From afe7cc88dc1c603d849bfac407867231ce8ccdff Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megi@xff.cz>
Date: Thu, 26 Sep 2024 23:00:02 +0200
Subject: Revert "Input: cyttsp4 - remove driver"

This reverts commit 25162a4f64f8ba0065f300977589fe1f6af332f0.
---
 drivers/input/touchscreen/Kconfig             |   30 +
 drivers/input/touchscreen/Makefile            |    5 +-
 drivers/input/touchscreen/cyttsp4_core.c      | 2174 +++++++++++++++++
 drivers/input/touchscreen/cyttsp4_core.h      |  448 ++++
 drivers/input/touchscreen/cyttsp4_i2c.c       |   72 +
 drivers/input/touchscreen/cyttsp4_spi.c       |  187 ++
 drivers/input/touchscreen/cyttsp_core.h       |    4 +
 drivers/input/touchscreen/cyttsp_i2c.c        |   55 -
 drivers/input/touchscreen/cyttsp_i2c_common.c |   86 +
 include/linux/platform_data/cyttsp4.h         |   62 +
 10 files changed, 3067 insertions(+), 56 deletions(-)
 create mode 100644 drivers/input/touchscreen/cyttsp4_core.c
 create mode 100644 drivers/input/touchscreen/cyttsp4_core.h
 create mode 100644 drivers/input/touchscreen/cyttsp4_i2c.c
 create mode 100644 drivers/input/touchscreen/cyttsp4_spi.c
 create mode 100644 drivers/input/touchscreen/cyttsp_i2c_common.c
 create mode 100644 include/linux/platform_data/cyttsp4.h

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 1a03de7fcfa6..3a8a3ad64cdc 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -254,6 +254,36 @@ config TOUCHSCREEN_CYTTSP_SPI
 	  To compile this driver as a module, choose M here: the
 	  module will be called cyttsp_spi.
 
+config TOUCHSCREEN_CYTTSP4_CORE
+	tristate "Cypress TrueTouch Gen4 Touchscreen Driver"
+	help
+	  Core driver for Cypress TrueTouch(tm) Standard Product
+	  Generation4 touchscreen controllers.
+
+	  Say Y here if you have a Cypress Gen4 touchscreen.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here.
+
+config TOUCHSCREEN_CYTTSP4_I2C
+	tristate "support I2C bus connection"
+	depends on TOUCHSCREEN_CYTTSP4_CORE && I2C
+	help
+	  Say Y here if the touchscreen is connected via I2C bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cyttsp4_i2c.
+
+config TOUCHSCREEN_CYTTSP4_SPI
+	tristate "support SPI bus connection"
+	depends on TOUCHSCREEN_CYTTSP4_CORE && SPI_MASTER
+	help
+	  Say Y here if the touchscreen is connected via SPI bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cyttsp4_spi.
+
 config TOUCHSCREEN_CYTTSP5
 	tristate "Cypress TrueTouch Gen5 Touchscreen Driver"
 	depends on I2C
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 82bc837ca01e..04dc8039341b 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -25,8 +25,11 @@ obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8505)	+= chipone_icn8505.o
 obj-$(CONFIG_TOUCHSCREEN_CY8CTMA140)	+= cy8ctma140.o
 obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE)	+= cyttsp_core.o
-obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C)	+= cyttsp_i2c.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C)	+= cyttsp_i2c.o cyttsp_i2c_common.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI)	+= cyttsp_spi.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_CORE)	+= cyttsp4_core.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_I2C)	+= cyttsp4_i2c.o cyttsp_i2c_common.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_SPI)	+= cyttsp4_spi.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP5)	+= cyttsp5.o
 obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o
 obj-$(CONFIG_TOUCHSCREEN_DA9052)	+= da9052_tsi.o
diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
new file mode 100644
index 000000000000..7cb26929dc73
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -0,0 +1,2174 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cyttsp4_core.c
+ * Cypress TrueTouch(TM) Standard Product V4 Core driver module.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2012 Cypress Semiconductor
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#include "cyttsp4_core.h"
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/input/mt.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+/* Timeout in ms. */
+#define CY_CORE_REQUEST_EXCLUSIVE_TIMEOUT	500
+#define CY_CORE_SLEEP_REQUEST_EXCLUSIVE_TIMEOUT	5000
+#define CY_CORE_MODE_CHANGE_TIMEOUT		1000
+#define CY_CORE_RESET_AND_WAIT_TIMEOUT		500
+#define CY_CORE_WAKEUP_TIMEOUT			500
+
+#define CY_CORE_STARTUP_RETRY_COUNT		3
+
+static const char * const cyttsp4_tch_abs_string[] = {
+	[CY_TCH_X]	= "X",
+	[CY_TCH_Y]	= "Y",
+	[CY_TCH_P]	= "P",
+	[CY_TCH_T]	= "T",
+	[CY_TCH_E]	= "E",
+	[CY_TCH_O]	= "O",
+	[CY_TCH_W]	= "W",
+	[CY_TCH_MAJ]	= "MAJ",
+	[CY_TCH_MIN]	= "MIN",
+	[CY_TCH_OR]	= "OR",
+	[CY_TCH_NUM_ABS] = "INVALID"
+};
+
+static const u8 ldr_exit[] = {
+	0xFF, 0x01, 0x3B, 0x00, 0x00, 0x4F, 0x6D, 0x17
+};
+
+static const u8 ldr_err_app[] = {
+	0x01, 0x02, 0x00, 0x00, 0x55, 0xDD, 0x17
+};
+
+static inline size_t merge_bytes(u8 high, u8 low)
+{
+	return (high << 8) + low;
+}
+
+#ifdef VERBOSE_DEBUG
+static void cyttsp4_pr_buf(struct device *dev, u8 *pr_buf, u8 *dptr, int size,
+		const char *data_name)
+{
+	int i, k;
+	const char fmt[] = "%02X ";
+	int max;
+
+	if (!size)
+		return;
+
+	max = (CY_MAX_PRBUF_SIZE - 1) - sizeof(CY_PR_TRUNCATED);
+
+	pr_buf[0] = 0;
+	for (i = k = 0; i < size && k < max; i++, k += 3)
+		scnprintf(pr_buf + k, CY_MAX_PRBUF_SIZE, fmt, dptr[i]);
+
+	dev_vdbg(dev, "%s:  %s[0..%d]=%s%s\n", __func__, data_name, size - 1,
+			pr_buf, size <= max ? "" : CY_PR_TRUNCATED);
+}
+#else
+#define cyttsp4_pr_buf(dev, pr_buf, dptr, size, data_name) do { } while (0)
+#endif
+
+static int cyttsp4_load_status_regs(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	struct device *dev = cd->dev;
+	int rc;
+
+	rc = cyttsp4_adap_read(cd, CY_REG_BASE, si->si_ofs.mode_size,
+			si->xy_mode);
+	if (rc < 0)
+		dev_err(dev, "%s: fail read mode regs r=%d\n",
+			__func__, rc);
+	else
+		cyttsp4_pr_buf(dev, cd->pr_buf, si->xy_mode,
+			si->si_ofs.mode_size, "xy_mode");
+
+	return rc;
+}
+
+static int cyttsp4_handshake(struct cyttsp4 *cd, u8 mode)
+{
+	u8 cmd = mode ^ CY_HST_TOGGLE;
+	int rc;
+
+	/*
+	 * Mode change issued, handshaking now will cause endless mode change
+	 * requests, for sync mode modechange will do same with handshake
+	 * */
+	if (mode & CY_HST_MODE_CHANGE)
+		return 0;
+
+	rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(cmd), &cmd);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: bus write fail on handshake (ret=%d)\n",
+				__func__, rc);
+
+	return rc;
+}
+
+static int cyttsp4_hw_soft_reset(struct cyttsp4 *cd)
+{
+	u8 cmd = CY_HST_RESET;
+	int rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(cmd), &cmd);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: FAILED to execute SOFT reset\n",
+				__func__);
+		return rc;
+	}
+	return 0;
+}
+
+static int cyttsp4_hw_hard_reset(struct cyttsp4 *cd)
+{
+	if (cd->cpdata->xres) {
+		cd->cpdata->xres(cd->cpdata, cd->dev);
+		dev_dbg(cd->dev, "%s: execute HARD reset\n", __func__);
+		return 0;
+	}
+	dev_err(cd->dev, "%s: FAILED to execute HARD reset\n", __func__);
+	return -ENOSYS;
+}
+
+static int cyttsp4_hw_reset(struct cyttsp4 *cd)
+{
+	int rc = cyttsp4_hw_hard_reset(cd);
+	if (rc == -ENOSYS)
+		rc = cyttsp4_hw_soft_reset(cd);
+	return rc;
+}
+
+/*
+ * Gets number of bits for a touch filed as parameter,
+ * sets maximum value for field which is used as bit mask
+ * and returns number of bytes required for that field
+ */
+static int cyttsp4_bits_2_bytes(unsigned int nbits, size_t *max)
+{
+	*max = 1UL << nbits;
+	return (nbits + 7) / 8;
+}
+
+static int cyttsp4_si_data_offsets(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(si->si_data),
+			&si->si_data);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read sysinfo data offsets r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	/* Print sysinfo data offsets */
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)&si->si_data,
+		       sizeof(si->si_data), "sysinfo_data_offsets");
+
+	/* convert sysinfo data offset bytes into integers */
+
+	si->si_ofs.map_sz = merge_bytes(si->si_data.map_szh,
+			si->si_data.map_szl);
+	si->si_ofs.map_sz = merge_bytes(si->si_data.map_szh,
+			si->si_data.map_szl);
+	si->si_ofs.cydata_ofs = merge_bytes(si->si_data.cydata_ofsh,
+			si->si_data.cydata_ofsl);
+	si->si_ofs.test_ofs = merge_bytes(si->si_data.test_ofsh,
+			si->si_data.test_ofsl);
+	si->si_ofs.pcfg_ofs = merge_bytes(si->si_data.pcfg_ofsh,
+			si->si_data.pcfg_ofsl);
+	si->si_ofs.opcfg_ofs = merge_bytes(si->si_data.opcfg_ofsh,
+			si->si_data.opcfg_ofsl);
+	si->si_ofs.ddata_ofs = merge_bytes(si->si_data.ddata_ofsh,
+			si->si_data.ddata_ofsl);
+	si->si_ofs.mdata_ofs = merge_bytes(si->si_data.mdata_ofsh,
+			si->si_data.mdata_ofsl);
+	return rc;
+}
+
+static int cyttsp4_si_get_cydata(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int read_offset;
+	int mfgid_sz, calc_mfgid_sz;
+	void *p;
+	int rc;
+
+	if (si->si_ofs.test_ofs <= si->si_ofs.cydata_ofs) {
+		dev_err(cd->dev,
+			"%s: invalid offset test_ofs: %zu, cydata_ofs: %zu\n",
+			__func__, si->si_ofs.test_ofs, si->si_ofs.cydata_ofs);
+		return -EINVAL;
+	}
+
+	si->si_ofs.cydata_size = si->si_ofs.test_ofs - si->si_ofs.cydata_ofs;
+	dev_dbg(cd->dev, "%s: cydata size: %zd\n", __func__,
+			si->si_ofs.cydata_size);
+
+	p = krealloc(si->si_ptrs.cydata, si->si_ofs.cydata_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: failed to allocate cydata memory\n",
+			__func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.cydata = p;
+
+	read_offset = si->si_ofs.cydata_ofs;
+
+	/* Read the CYDA registers up to MFGID field */
+	rc = cyttsp4_adap_read(cd, read_offset,
+			offsetof(struct cyttsp4_cydata, mfgid_sz)
+				+ sizeof(si->si_ptrs.cydata->mfgid_sz),
+			si->si_ptrs.cydata);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read cydata r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	/* Check MFGID size */
+	mfgid_sz = si->si_ptrs.cydata->mfgid_sz;
+	calc_mfgid_sz = si->si_ofs.cydata_size - sizeof(struct cyttsp4_cydata);
+	if (mfgid_sz != calc_mfgid_sz) {
+		dev_err(cd->dev, "%s: mismatch in MFGID size, reported:%d calculated:%d\n",
+			__func__, mfgid_sz, calc_mfgid_sz);
+		return -EINVAL;
+	}
+
+	read_offset += offsetof(struct cyttsp4_cydata, mfgid_sz)
+			+ sizeof(si->si_ptrs.cydata->mfgid_sz);
+
+	/* Read the CYDA registers for MFGID field */
+	rc = cyttsp4_adap_read(cd, read_offset, si->si_ptrs.cydata->mfgid_sz,
+			si->si_ptrs.cydata->mfg_id);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read cydata r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	read_offset += si->si_ptrs.cydata->mfgid_sz;
+
+	/* Read the rest of the CYDA registers */
+	rc = cyttsp4_adap_read(cd, read_offset,
+			sizeof(struct cyttsp4_cydata)
+				- offsetof(struct cyttsp4_cydata, cyito_idh),
+			&si->si_ptrs.cydata->cyito_idh);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read cydata r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)si->si_ptrs.cydata,
+		si->si_ofs.cydata_size, "sysinfo_cydata");
+	return rc;
+}
+
+static int cyttsp4_si_get_test_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	if (si->si_ofs.pcfg_ofs <= si->si_ofs.test_ofs) {
+		dev_err(cd->dev,
+			"%s: invalid offset pcfg_ofs: %zu, test_ofs: %zu\n",
+			__func__, si->si_ofs.pcfg_ofs, si->si_ofs.test_ofs);
+		return -EINVAL;
+	}
+
+	si->si_ofs.test_size = si->si_ofs.pcfg_ofs - si->si_ofs.test_ofs;
+
+	p = krealloc(si->si_ptrs.test, si->si_ofs.test_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: failed to allocate test memory\n",
+			__func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.test = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.test_ofs, si->si_ofs.test_size,
+			si->si_ptrs.test);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read test data r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+		       (u8 *)si->si_ptrs.test, si->si_ofs.test_size,
+		       "sysinfo_test_data");
+	if (si->si_ptrs.test->post_codel &
+	    CY_POST_CODEL_WDG_RST)
+		dev_info(cd->dev, "%s: %s codel=%02X\n",
+			 __func__, "Reset was a WATCHDOG RESET",
+			 si->si_ptrs.test->post_codel);
+
+	if (!(si->si_ptrs.test->post_codel &
+	      CY_POST_CODEL_CFG_DATA_CRC_FAIL))
+		dev_info(cd->dev, "%s: %s codel=%02X\n", __func__,
+			 "Config Data CRC FAIL",
+			 si->si_ptrs.test->post_codel);
+
+	if (!(si->si_ptrs.test->post_codel &
+	      CY_POST_CODEL_PANEL_TEST_FAIL))
+		dev_info(cd->dev, "%s: %s codel=%02X\n",
+			 __func__, "PANEL TEST FAIL",
+			 si->si_ptrs.test->post_codel);
+
+	dev_info(cd->dev, "%s: SCANNING is %s codel=%02X\n",
+		 __func__, si->si_ptrs.test->post_codel & 0x08 ?
+		 "ENABLED" : "DISABLED",
+		 si->si_ptrs.test->post_codel);
+	return rc;
+}
+
+static int cyttsp4_si_get_pcfg_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	if (si->si_ofs.opcfg_ofs <= si->si_ofs.pcfg_ofs) {
+		dev_err(cd->dev,
+			"%s: invalid offset opcfg_ofs: %zu, pcfg_ofs: %zu\n",
+			__func__, si->si_ofs.opcfg_ofs, si->si_ofs.pcfg_ofs);
+		return -EINVAL;
+	}
+
+	si->si_ofs.pcfg_size = si->si_ofs.opcfg_ofs - si->si_ofs.pcfg_ofs;
+
+	p = krealloc(si->si_ptrs.pcfg, si->si_ofs.pcfg_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: failed to allocate pcfg memory\n",
+			__func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.pcfg = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.pcfg_ofs, si->si_ofs.pcfg_size,
+			si->si_ptrs.pcfg);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read pcfg data r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	si->si_ofs.max_x = merge_bytes((si->si_ptrs.pcfg->res_xh
+			& CY_PCFG_RESOLUTION_X_MASK), si->si_ptrs.pcfg->res_xl);
+	si->si_ofs.x_origin = !!(si->si_ptrs.pcfg->res_xh
+			& CY_PCFG_ORIGIN_X_MASK);
+	si->si_ofs.max_y = merge_bytes((si->si_ptrs.pcfg->res_yh
+			& CY_PCFG_RESOLUTION_Y_MASK), si->si_ptrs.pcfg->res_yl);
+	si->si_ofs.y_origin = !!(si->si_ptrs.pcfg->res_yh
+			& CY_PCFG_ORIGIN_Y_MASK);
+	si->si_ofs.max_p = merge_bytes(si->si_ptrs.pcfg->max_zh,
+			si->si_ptrs.pcfg->max_zl);
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+		       (u8 *)si->si_ptrs.pcfg,
+		       si->si_ofs.pcfg_size, "sysinfo_pcfg_data");
+	return rc;
+}
+
+static int cyttsp4_si_get_opcfg_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	struct cyttsp4_tch_abs_params *tch;
+	struct cyttsp4_tch_rec_params *tch_old, *tch_new;
+	enum cyttsp4_tch_abs abs;
+	int i;
+	void *p;
+	int rc;
+
+	if (si->si_ofs.ddata_ofs <= si->si_ofs.opcfg_ofs) {
+		dev_err(cd->dev,
+			"%s: invalid offset ddata_ofs: %zu, opcfg_ofs: %zu\n",
+			__func__, si->si_ofs.ddata_ofs, si->si_ofs.opcfg_ofs);
+		return -EINVAL;
+	}
+
+	si->si_ofs.opcfg_size = si->si_ofs.ddata_ofs - si->si_ofs.opcfg_ofs;
+
+	p = krealloc(si->si_ptrs.opcfg, si->si_ofs.opcfg_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: failed to allocate opcfg memory\n",
+			__func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.opcfg = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.opcfg_ofs, si->si_ofs.opcfg_size,
+			si->si_ptrs.opcfg);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read opcfg data r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+	si->si_ofs.cmd_ofs = si->si_ptrs.opcfg->cmd_ofs;
+	si->si_ofs.rep_ofs = si->si_ptrs.opcfg->rep_ofs;
+	si->si_ofs.rep_sz = (si->si_ptrs.opcfg->rep_szh * 256) +
+		si->si_ptrs.opcfg->rep_szl;
+	si->si_ofs.num_btns = si->si_ptrs.opcfg->num_btns;
+	si->si_ofs.num_btn_regs = (si->si_ofs.num_btns +
+		CY_NUM_BTN_PER_REG - 1) / CY_NUM_BTN_PER_REG;
+	si->si_ofs.tt_stat_ofs = si->si_ptrs.opcfg->tt_stat_ofs;
+	si->si_ofs.obj_cfg0 = si->si_ptrs.opcfg->obj_cfg0;
+	si->si_ofs.max_tchs = si->si_ptrs.opcfg->max_tchs &
+		CY_BYTE_OFS_MASK;
+	si->si_ofs.tch_rec_size = si->si_ptrs.opcfg->tch_rec_size &
+		CY_BYTE_OFS_MASK;
+
+	/* Get the old touch fields */
+	for (abs = CY_TCH_X; abs < CY_NUM_TCH_FIELDS; abs++) {
+		tch = &si->si_ofs.tch_abs[abs];
+		tch_old = &si->si_ptrs.opcfg->tch_rec_old[abs];
+
+		tch->ofs = tch_old->loc & CY_BYTE_OFS_MASK;
+		tch->size = cyttsp4_bits_2_bytes(tch_old->size,
+						 &tch->max);
+		tch->bofs = (tch_old->loc & CY_BOFS_MASK) >> CY_BOFS_SHIFT;
+	}
+
+	/* button fields */
+	si->si_ofs.btn_rec_size = si->si_ptrs.opcfg->btn_rec_size;
+	si->si_ofs.btn_diff_ofs = si->si_ptrs.opcfg->btn_diff_ofs;
+	si->si_ofs.btn_diff_size = si->si_ptrs.opcfg->btn_diff_size;
+
+	if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE) {
+		/* Get the extended touch fields */
+		for (i = 0; i < CY_NUM_EXT_TCH_FIELDS; abs++, i++) {
+			tch = &si->si_ofs.tch_abs[abs];
+			tch_new = &si->si_ptrs.opcfg->tch_rec_new[i];
+
+			tch->ofs = tch_new->loc & CY_BYTE_OFS_MASK;
+			tch->size = cyttsp4_bits_2_bytes(tch_new->size,
+							 &tch->max);
+			tch->bofs = (tch_new->loc & CY_BOFS_MASK) >> CY_BOFS_SHIFT;
+		}
+	}
+
+	for (abs = 0; abs < CY_TCH_NUM_ABS; abs++) {
+		dev_dbg(cd->dev, "%s: tch_rec_%s\n", __func__,
+			cyttsp4_tch_abs_string[abs]);
+		dev_dbg(cd->dev, "%s:     ofs =%2zd\n", __func__,
+			si->si_ofs.tch_abs[abs].ofs);
+		dev_dbg(cd->dev, "%s:     siz =%2zd\n", __func__,
+			si->si_ofs.tch_abs[abs].size);
+		dev_dbg(cd->dev, "%s:     max =%2zd\n", __func__,
+			si->si_ofs.tch_abs[abs].max);
+		dev_dbg(cd->dev, "%s:     bofs=%2zd\n", __func__,
+			si->si_ofs.tch_abs[abs].bofs);
+	}
+
+	si->si_ofs.mode_size = si->si_ofs.tt_stat_ofs + 1;
+	si->si_ofs.data_size = si->si_ofs.max_tchs *
+		si->si_ptrs.opcfg->tch_rec_size;
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)si->si_ptrs.opcfg,
+		si->si_ofs.opcfg_size, "sysinfo_opcfg_data");
+
+	return 0;
+}
+
+static int cyttsp4_si_get_ddata(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	si->si_ofs.ddata_size = si->si_ofs.mdata_ofs - si->si_ofs.ddata_ofs;
+
+	p = krealloc(si->si_ptrs.ddata, si->si_ofs.ddata_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: fail alloc ddata memory\n", __func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.ddata = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.ddata_ofs, si->si_ofs.ddata_size,
+			si->si_ptrs.ddata);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: fail read ddata data r=%d\n",
+			__func__, rc);
+	else
+		cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+			       (u8 *)si->si_ptrs.ddata,
+			       si->si_ofs.ddata_size, "sysinfo_ddata");
+	return rc;
+}
+
+static int cyttsp4_si_get_mdata(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	si->si_ofs.mdata_size = si->si_ofs.map_sz - si->si_ofs.mdata_ofs;
+
+	p = krealloc(si->si_ptrs.mdata, si->si_ofs.mdata_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: fail alloc mdata memory\n", __func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.mdata = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.mdata_ofs, si->si_ofs.mdata_size,
+			si->si_ptrs.mdata);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: fail read mdata data r=%d\n",
+			__func__, rc);
+	else
+		cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+			       (u8 *)si->si_ptrs.mdata,
+			       si->si_ofs.mdata_size, "sysinfo_mdata");
+	return rc;
+}
+
+static int cyttsp4_si_get_btn_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int btn;
+	int num_defined_keys;
+	u16 *key_table;
+	void *p;
+	int rc = 0;
+
+	if (si->si_ofs.num_btns) {
+		si->si_ofs.btn_keys_size = si->si_ofs.num_btns *
+			sizeof(struct cyttsp4_btn);
+
+		p = krealloc(si->btn, si->si_ofs.btn_keys_size,
+				GFP_KERNEL|__GFP_ZERO);
+		if (p == NULL) {
+			dev_err(cd->dev, "%s: %s\n", __func__,
+				"fail alloc btn_keys memory");
+			return -ENOMEM;
+		}
+		si->btn = p;
+
+		if (cd->cpdata->sett[CY_IC_GRPNUM_BTN_KEYS] == NULL)
+			num_defined_keys = 0;
+		else if (cd->cpdata->sett[CY_IC_GRPNUM_BTN_KEYS]->data == NULL)
+			num_defined_keys = 0;
+		else
+			num_defined_keys = cd->cpdata->sett
+				[CY_IC_GRPNUM_BTN_KEYS]->size;
+
+		for (btn = 0; btn < si->si_ofs.num_btns &&
+			btn < num_defined_keys; btn++) {
+			key_table = (u16 *)cd->cpdata->sett
+				[CY_IC_GRPNUM_BTN_KEYS]->data;
+			si->btn[btn].key_code = key_table[btn];
+			si->btn[btn].state = CY_BTN_RELEASED;
+			si->btn[btn].enabled = true;
+		}
+		for (; btn < si->si_ofs.num_btns; btn++) {
+			si->btn[btn].key_code = KEY_RESERVED;
+			si->btn[btn].state = CY_BTN_RELEASED;
+			si->btn[btn].enabled = true;
+		}
+
+		return rc;
+	}
+
+	si->si_ofs.btn_keys_size = 0;
+	kfree(si->btn);
+	si->btn = NULL;
+	return rc;
+}
+
+static int cyttsp4_si_get_op_data_ptrs(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+
+	p = krealloc(si->xy_mode, si->si_ofs.mode_size, GFP_KERNEL|__GFP_ZERO);
+	if (p == NULL)
+		return -ENOMEM;
+	si->xy_mode = p;
+
+	p = krealloc(si->xy_data, si->si_ofs.data_size, GFP_KERNEL|__GFP_ZERO);
+	if (p == NULL)
+		return -ENOMEM;
+	si->xy_data = p;
+
+	p = krealloc(si->btn_rec_data,
+			si->si_ofs.btn_rec_size * si->si_ofs.num_btns,
+			GFP_KERNEL|__GFP_ZERO);
+	if (p == NULL)
+		return -ENOMEM;
+	si->btn_rec_data = p;
+
+	return 0;
+}
+
+static void cyttsp4_si_put_log_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	dev_dbg(cd->dev, "%s: cydata_ofs =%4zd siz=%4zd\n", __func__,
+		si->si_ofs.cydata_ofs, si->si_ofs.cydata_size);
+	dev_dbg(cd->dev, "%s: test_ofs   =%4zd siz=%4zd\n", __func__,
+		si->si_ofs.test_ofs, si->si_ofs.test_size);
+	dev_dbg(cd->dev, "%s: pcfg_ofs   =%4zd siz=%4zd\n", __func__,
+		si->si_ofs.pcfg_ofs, si->si_ofs.pcfg_size);
+	dev_dbg(cd->dev, "%s: opcfg_ofs  =%4zd siz=%4zd\n", __func__,
+		si->si_ofs.opcfg_ofs, si->si_ofs.opcfg_size);
+	dev_dbg(cd->dev, "%s: ddata_ofs  =%4zd siz=%4zd\n", __func__,
+		si->si_ofs.ddata_ofs, si->si_ofs.ddata_size);
+	dev_dbg(cd->dev, "%s: mdata_ofs  =%4zd siz=%4zd\n", __func__,
+		si->si_ofs.mdata_ofs, si->si_ofs.mdata_size);
+
+	dev_dbg(cd->dev, "%s: cmd_ofs       =%4zd\n", __func__,
+		si->si_ofs.cmd_ofs);
+	dev_dbg(cd->dev, "%s: rep_ofs       =%4zd\n", __func__,
+		si->si_ofs.rep_ofs);
+	dev_dbg(cd->dev, "%s: rep_sz        =%4zd\n", __func__,
+		si->si_ofs.rep_sz);
+	dev_dbg(cd->dev, "%s: num_btns      =%4zd\n", __func__,
+		si->si_ofs.num_btns);
+	dev_dbg(cd->dev, "%s: num_btn_regs  =%4zd\n", __func__,
+		si->si_ofs.num_btn_regs);
+	dev_dbg(cd->dev, "%s: tt_stat_ofs   =%4zd\n", __func__,
+		si->si_ofs.tt_stat_ofs);
+	dev_dbg(cd->dev, "%s: tch_rec_size  =%4zd\n", __func__,
+		si->si_ofs.tch_rec_size);
+	dev_dbg(cd->dev, "%s: max_tchs      =%4zd\n", __func__,
+		si->si_ofs.max_tchs);
+	dev_dbg(cd->dev, "%s: mode_size     =%4zd\n", __func__,
+		si->si_ofs.mode_size);
+	dev_dbg(cd->dev, "%s: data_size     =%4zd\n", __func__,
+		si->si_ofs.data_size);
+	dev_dbg(cd->dev, "%s: map_sz        =%4zd\n", __func__,
+		si->si_ofs.map_sz);
+
+	dev_dbg(cd->dev, "%s: btn_rec_size   =%2zd\n", __func__,
+		si->si_ofs.btn_rec_size);
+	dev_dbg(cd->dev, "%s: btn_diff_ofs   =%2zd\n", __func__,
+		si->si_ofs.btn_diff_ofs);
+	dev_dbg(cd->dev, "%s: btn_diff_size  =%2zd\n", __func__,
+		si->si_ofs.btn_diff_size);
+
+	dev_dbg(cd->dev, "%s: max_x    = 0x%04zX (%zd)\n", __func__,
+		si->si_ofs.max_x, si->si_ofs.max_x);
+	dev_dbg(cd->dev, "%s: x_origin = %zd (%s)\n", __func__,
+		si->si_ofs.x_origin,
+		si->si_ofs.x_origin == CY_NORMAL_ORIGIN ?
+		"left corner" : "right corner");
+	dev_dbg(cd->dev, "%s: max_y    = 0x%04zX (%zd)\n", __func__,
+		si->si_ofs.max_y, si->si_ofs.max_y);
+	dev_dbg(cd->dev, "%s: y_origin = %zd (%s)\n", __func__,
+		si->si_ofs.y_origin,
+		si->si_ofs.y_origin == CY_NORMAL_ORIGIN ?
+		"upper corner" : "lower corner");
+	dev_dbg(cd->dev, "%s: max_p    = 0x%04zX (%zd)\n", __func__,
+		si->si_ofs.max_p, si->si_ofs.max_p);
+
+	dev_dbg(cd->dev, "%s: xy_mode=%p xy_data=%p\n", __func__,
+		si->xy_mode, si->xy_data);
+}
+
+static int cyttsp4_get_sysinfo_regs(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int rc;
+
+	rc = cyttsp4_si_data_offsets(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_cydata(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_test_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_pcfg_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_opcfg_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_ddata(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_mdata(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_btn_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_op_data_ptrs(cd);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: failed to get_op_data\n",
+			__func__);
+		return rc;
+	}
+
+	cyttsp4_si_put_log_data(cd);
+
+	/* provide flow control handshake */
+	rc = cyttsp4_handshake(cd, si->si_data.hst_mode);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: handshake fail on sysinfo reg\n",
+			__func__);
+
+	si->ready = true;
+	return rc;
+}
+
+static void cyttsp4_queue_startup_(struct cyttsp4 *cd)
+{
+	if (cd->startup_state == STARTUP_NONE) {
+		cd->startup_state = STARTUP_QUEUED;
+		schedule_work(&cd->startup_work);
+		dev_dbg(cd->dev, "%s: cyttsp4_startup queued\n", __func__);
+	} else {
+		dev_dbg(cd->dev, "%s: startup_state = %d\n", __func__,
+			cd->startup_state);
+	}
+}
+
+static void cyttsp4_report_slot_liftoff(struct cyttsp4_mt_data *md,
+		int max_slots)
+{
+	int t;
+
+	if (md->num_prv_tch == 0)
+		return;
+
+	for (t = 0; t < max_slots; t++) {
+		input_mt_slot(md->input, t);
+		input_mt_report_slot_inactive(md->input);
+	}
+}
+
+static void cyttsp4_lift_all(struct cyttsp4_mt_data *md)
+{
+	if (!md->si)
+		return;
+
+	if (md->num_prv_tch != 0) {
+		cyttsp4_report_slot_liftoff(md,
+				md->si->si_ofs.tch_abs[CY_TCH_T].max);
+		input_sync(md->input);
+		md->num_prv_tch = 0;
+	}
+}
+
+static void cyttsp4_get_touch_axis(struct cyttsp4_mt_data *md,
+	int *axis, int size, int max, u8 *xy_data, int bofs)
+{
+	int nbyte;
+	int next;
+
+	for (nbyte = 0, *axis = 0, next = 0; nbyte < size; nbyte++) {
+		dev_vdbg(&md->input->dev,
+			"%s: *axis=%02X(%d) size=%d max=%08X xy_data=%p"
+			" xy_data[%d]=%02X(%d) bofs=%d\n",
+			__func__, *axis, *axis, size, max, xy_data, next,
+			xy_data[next], xy_data[next], bofs);
+		*axis = (*axis * 256) + (xy_data[next] >> bofs);
+		next++;
+	}
+
+	*axis &= max - 1;
+
+	dev_vdbg(&md->input->dev,
+		"%s: *axis=%02X(%d) size=%d max=%08X xy_data=%p"
+		" xy_data[%d]=%02X(%d)\n",
+		__func__, *axis, *axis, size, max, xy_data, next,
+		xy_data[next], xy_data[next]);
+}
+
+static void cyttsp4_get_touch(struct cyttsp4_mt_data *md,
+	struct cyttsp4_touch *touch, u8 *xy_data)
+{
+	struct device *dev = &md->input->dev;
+	struct cyttsp4_sysinfo *si = md->si;
+	enum cyttsp4_tch_abs abs;
+	bool flipped;
+
+	for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) {
+		cyttsp4_get_touch_axis(md, &touch->abs[abs],
+			si->si_ofs.tch_abs[abs].size,
+			si->si_ofs.tch_abs[abs].max,
+			xy_data + si->si_ofs.tch_abs[abs].ofs,
+			si->si_ofs.tch_abs[abs].bofs);
+		dev_vdbg(dev, "%s: get %s=%04X(%d)\n", __func__,
+			cyttsp4_tch_abs_string[abs],
+			touch->abs[abs], touch->abs[abs]);
+	}
+
+	if (md->pdata->flags & CY_FLAG_FLIP) {
+		swap(touch->abs[CY_TCH_X], touch->abs[CY_TCH_Y]);
+		flipped = true;
+	} else
+		flipped = false;
+
+	if (md->pdata->flags & CY_FLAG_INV_X) {
+		if (flipped)
+			touch->abs[CY_TCH_X] = md->si->si_ofs.max_y -
+				touch->abs[CY_TCH_X];
+		else
+			touch->abs[CY_TCH_X] = md->si->si_ofs.max_x -
+				touch->abs[CY_TCH_X];
+	}
+	if (md->pdata->flags & CY_FLAG_INV_Y) {
+		if (flipped)
+			touch->abs[CY_TCH_Y] = md->si->si_ofs.max_x -
+				touch->abs[CY_TCH_Y];
+		else
+			touch->abs[CY_TCH_Y] = md->si->si_ofs.max_y -
+				touch->abs[CY_TCH_Y];
+	}
+
+	dev_vdbg(dev, "%s: flip=%s inv-x=%s inv-y=%s x=%04X(%d) y=%04X(%d)\n",
+		__func__, flipped ? "true" : "false",
+		md->pdata->flags & CY_FLAG_INV_X ? "true" : "false",
+		md->pdata->flags & CY_FLAG_INV_Y ? "true" : "false",
+		touch->abs[CY_TCH_X], touch->abs[CY_TCH_X],
+		touch->abs[CY_TCH_Y], touch->abs[CY_TCH_Y]);
+}
+
+static void cyttsp4_final_sync(struct input_dev *input, int max_slots, int *ids)
+{
+	int t;
+
+	for (t = 0; t < max_slots; t++) {
+		if (ids[t])
+			continue;
+		input_mt_slot(input, t);
+		input_mt_report_slot_inactive(input);
+	}
+
+	input_sync(input);
+}
+
+static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
+{
+	struct device *dev = &md->input->dev;
+	struct cyttsp4_sysinfo *si = md->si;
+	struct cyttsp4_touch tch;
+	int sig;
+	int i, j, t = 0;
+	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+
+	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
+	for (i = 0; i < num_cur_tch; i++) {
+		cyttsp4_get_touch(md, &tch, si->xy_data +
+			(i * si->si_ofs.tch_rec_size));
+		if ((tch.abs[CY_TCH_T] < md->pdata->frmwrk->abs
+			[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MIN_OST]) ||
+			(tch.abs[CY_TCH_T] > md->pdata->frmwrk->abs
+			[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MAX_OST])) {
+			dev_err(dev, "%s: tch=%d -> bad trk_id=%d max_id=%d\n",
+				__func__, i, tch.abs[CY_TCH_T],
+				md->pdata->frmwrk->abs[(CY_ABS_ID_OST *
+				CY_NUM_ABS_SET) + CY_MAX_OST]);
+			continue;
+		}
+
+		/* use 0 based track id's */
+		sig = md->pdata->frmwrk->abs
+			[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + 0];
+		if (sig != CY_IGNORE_VALUE) {
+			t = tch.abs[CY_TCH_T] - md->pdata->frmwrk->abs
+				[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MIN_OST];
+			if (tch.abs[CY_TCH_E] == CY_EV_LIFTOFF) {
+				dev_dbg(dev, "%s: t=%d e=%d lift-off\n",
+					__func__, t, tch.abs[CY_TCH_E]);
+				goto cyttsp4_get_mt_touches_pr_tch;
+			}
+			input_mt_slot(md->input, t);
+			input_mt_report_slot_state(md->input, MT_TOOL_FINGER,
+					true);
+			ids[t] = true;
+		}
+
+		/* all devices: position and pressure fields */
+		for (j = 0; j <= CY_ABS_W_OST; j++) {
+			sig = md->pdata->frmwrk->abs[((CY_ABS_X_OST + j) *
+				CY_NUM_ABS_SET) + 0];
+			if (sig != CY_IGNORE_VALUE)
+				input_report_abs(md->input, sig,
+					tch.abs[CY_TCH_X + j]);
+		}
+		if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE) {
+			/*
+			 * TMA400 size and orientation fields:
+			 * if pressure is non-zero and major touch
+			 * signal is zero, then set major and minor touch
+			 * signals to minimum non-zero value
+			 */
+			if (tch.abs[CY_TCH_P] > 0 && tch.abs[CY_TCH_MAJ] == 0)
+				tch.abs[CY_TCH_MAJ] = tch.abs[CY_TCH_MIN] = 1;
+
+			/* Get the extended touch fields */
+			for (j = 0; j < CY_NUM_EXT_TCH_FIELDS; j++) {
+				sig = md->pdata->frmwrk->abs
+					[((CY_ABS_MAJ_OST + j) *
+					CY_NUM_ABS_SET) + 0];
+				if (sig != CY_IGNORE_VALUE)
+					input_report_abs(md->input, sig,
+						tch.abs[CY_TCH_MAJ + j]);
+			}
+		}
+
+cyttsp4_get_mt_touches_pr_tch:
+		if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE)
+			dev_dbg(dev,
+				"%s: t=%d x=%d y=%d z=%d M=%d m=%d o=%d e=%d\n",
+				__func__, t,
+				tch.abs[CY_TCH_X],
+				tch.abs[CY_TCH_Y],
+				tch.abs[CY_TCH_P],
+				tch.abs[CY_TCH_MAJ],
+				tch.abs[CY_TCH_MIN],
+				tch.abs[CY_TCH_OR],
+				tch.abs[CY_TCH_E]);
+		else
+			dev_dbg(dev,
+				"%s: t=%d x=%d y=%d z=%d e=%d\n", __func__,
+				t,
+				tch.abs[CY_TCH_X],
+				tch.abs[CY_TCH_Y],
+				tch.abs[CY_TCH_P],
+				tch.abs[CY_TCH_E]);
+	}
+
+	cyttsp4_final_sync(md->input, si->si_ofs.tch_abs[CY_TCH_T].max, ids);
+
+	md->num_prv_tch = num_cur_tch;
+
+	return;
+}
+
+/* read xy_data for all current touches */
+static int cyttsp4_xy_worker(struct cyttsp4 *cd)
+{
+	struct cyttsp4_mt_data *md = &cd->md;
+	struct device *dev = &md->input->dev;
+	struct cyttsp4_sysinfo *si = md->si;
+	u8 num_cur_tch;
+	u8 hst_mode;
+	u8 rep_len;
+	u8 rep_stat;
+	u8 tt_stat;
+	int rc = 0;
+
+	/*
+	 * Get event data from cyttsp4 device.
+	 * The event data includes all data
+	 * for all active touches.
+	 * Event data also includes button data
+	 */
+	/*
+	 * Use 2 reads:
+	 * 1st read to get mode + button bytes + touch count (core)
+	 * 2nd read (optional) to get touch 1 - touch n data
+	 */
+	hst_mode = si->xy_mode[CY_REG_BASE];
+	rep_len = si->xy_mode[si->si_ofs.rep_ofs];
+	rep_stat = si->xy_mode[si->si_ofs.rep_ofs + 1];
+	tt_stat = si->xy_mode[si->si_ofs.tt_stat_ofs];
+	dev_vdbg(dev, "%s: %s%02X %s%d %s%02X %s%02X\n", __func__,
+		"hst_mode=", hst_mode, "rep_len=", rep_len,
+		"rep_stat=", rep_stat, "tt_stat=", tt_stat);
+
+	num_cur_tch = GET_NUM_TOUCHES(tt_stat);
+	dev_vdbg(dev, "%s: num_cur_tch=%d\n", __func__, num_cur_tch);
+
+	if (rep_len == 0 && num_cur_tch > 0) {
+		dev_err(dev, "%s: report length error rep_len=%d num_tch=%d\n",
+			__func__, rep_len, num_cur_tch);
+		goto cyttsp4_xy_worker_exit;
+	}
+
+	/* read touches */
+	if (num_cur_tch > 0) {
+		rc = cyttsp4_adap_read(cd, si->si_ofs.tt_stat_ofs + 1,
+				num_cur_tch * si->si_ofs.tch_rec_size,
+				si->xy_data);
+		if (rc < 0) {
+			dev_err(dev, "%s: read fail on touch regs r=%d\n",
+				__func__, rc);
+			goto cyttsp4_xy_worker_exit;
+		}
+	}
+
+	/* print xy data */
+	cyttsp4_pr_buf(dev, cd->pr_buf, si->xy_data, num_cur_tch *
+		si->si_ofs.tch_rec_size, "xy_data");
+
+	/* check any error conditions */
+	if (IS_BAD_PKT(rep_stat)) {
+		dev_dbg(dev, "%s: Invalid buffer detected\n", __func__);
+		rc = 0;
+		goto cyttsp4_xy_worker_exit;
+	}
+
+	if (IS_LARGE_AREA(tt_stat))
+		dev_dbg(dev, "%s: Large area detected\n", __func__);
+
+	if (num_cur_tch > si->si_ofs.max_tchs) {
+		dev_err(dev, "%s: too many tch; set to max tch (n=%d c=%zd)\n",
+				__func__, num_cur_tch, si->si_ofs.max_tchs);
+		num_cur_tch = si->si_ofs.max_tchs;
+	}
+
+	/* extract xy_data for all currently reported touches */
+	dev_vdbg(dev, "%s: extract data num_cur_tch=%d\n", __func__,
+		num_cur_tch);
+	if (num_cur_tch)
+		cyttsp4_get_mt_touches(md, num_cur_tch);
+	else
+		cyttsp4_lift_all(md);
+
+	rc = 0;
+
+cyttsp4_xy_worker_exit:
+	return rc;
+}
+
+static int cyttsp4_mt_attention(struct cyttsp4 *cd)
+{
+	struct device *dev = cd->dev;
+	struct cyttsp4_mt_data *md = &cd->md;
+	int rc = 0;
+
+	if (!md->si)
+		return 0;
+
+	mutex_lock(&md->report_lock);
+	if (!md->is_suspended) {
+		/* core handles handshake */
+		rc = cyttsp4_xy_worker(cd);
+	} else {
+		dev_vdbg(dev, "%s: Ignoring report while suspended\n",
+			__func__);
+	}
+	mutex_unlock(&md->report_lock);
+	if (rc < 0)
+		dev_err(dev, "%s: xy_worker error r=%d\n", __func__, rc);
+
+	return rc;
+}
+
+static irqreturn_t cyttsp4_irq(int irq, void *handle)
+{
+	struct cyttsp4 *cd = handle;
+	struct device *dev = cd->dev;
+	enum cyttsp4_mode cur_mode;
+	u8 cmd_ofs = cd->sysinfo.si_ofs.cmd_ofs;
+	u8 mode[3];
+	int rc;
+
+	/*
+	 * Check whether this IRQ should be ignored (external)
+	 * This should be the very first thing to check since
+	 * ignore_irq may be set for a very short period of time
+	 */
+	if (atomic_read(&cd->ignore_irq)) {
+		dev_vdbg(dev, "%s: Ignoring IRQ\n", __func__);
+		return IRQ_HANDLED;
+	}
+
+	dev_dbg(dev, "%s int:0x%x\n", __func__, cd->int_status);
+
+	mutex_lock(&cd->system_lock);
+
+	/* Just to debug */
+	if (cd->sleep_state == SS_SLEEP_ON || cd->sleep_state == SS_SLEEPING)
+		dev_vdbg(dev, "%s: Received IRQ while in sleep\n", __func__);
+
+	rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), mode);
+	if (rc) {
+		dev_err(cd->dev, "%s: Fail read adapter r=%d\n", __func__, rc);
+		goto cyttsp4_irq_exit;
+	}
+	dev_vdbg(dev, "%s mode[0-2]:0x%X 0x%X 0x%X\n", __func__,
+			mode[0], mode[1], mode[2]);
+
+	if (IS_BOOTLOADER(mode[0], mode[1])) {
+		cur_mode = CY_MODE_BOOTLOADER;
+		dev_vdbg(dev, "%s: bl running\n", __func__);
+		if (cd->mode == CY_MODE_BOOTLOADER) {
+			/* Signal bootloader heartbeat heard */
+			wake_up(&cd->wait_q);
+			goto cyttsp4_irq_exit;
+		}
+
+		/* switch to bootloader */
+		dev_dbg(dev, "%s: restart switch to bl m=%d -> m=%d\n",
+			__func__, cd->mode, cur_mode);
+
+		/* catch operation->bl glitch */
+		if (cd->mode != CY_MODE_UNKNOWN) {
+			/* Incase startup_state do not let startup_() */
+			cd->mode = CY_MODE_UNKNOWN;
+			cyttsp4_queue_startup_(cd);
+			goto cyttsp4_irq_exit;
+		}
+
+		/*
+		 * do not wake thread on this switch since
+		 * it is possible to get an early heartbeat
+		 * prior to performing the reset
+		 */
+		cd->mode = cur_mode;
+
+		goto cyttsp4_irq_exit;
+	}
+
+	switch (mode[0] & CY_HST_MODE) {
+	case CY_HST_OPERATE:
+		cur_mode = CY_MODE_OPERATIONAL;
+		dev_vdbg(dev, "%s: operational\n", __func__);
+		break;
+	case CY_HST_CAT:
+		cur_mode = CY_MODE_CAT;
+		dev_vdbg(dev, "%s: CaT\n", __func__);
+		break;
+	case CY_HST_SYSINFO:
+		cur_mode = CY_MODE_SYSINFO;
+		dev_vdbg(dev, "%s: sysinfo\n", __func__);
+		break;
+	default:
+		cur_mode = CY_MODE_UNKNOWN;
+		dev_err(dev, "%s: unknown HST mode 0x%02X\n", __func__,
+			mode[0]);
+		break;
+	}
+
+	/* Check whether this IRQ should be ignored (internal) */
+	if (cd->int_status & CY_INT_IGNORE) {
+		dev_vdbg(dev, "%s: Ignoring IRQ\n", __func__);
+		goto cyttsp4_irq_exit;
+	}
+
+	/* Check for wake up interrupt */
+	if (cd->int_status & CY_INT_AWAKE) {
+		cd->int_status &= ~CY_INT_AWAKE;
+		wake_up(&cd->wait_q);
+		dev_vdbg(dev, "%s: Received wake up interrupt\n", __func__);
+		goto cyttsp4_irq_handshake;
+	}
+
+	/* Expecting mode change interrupt */
+	if ((cd->int_status & CY_INT_MODE_CHANGE)
+			&& (mode[0] & CY_HST_MODE_CHANGE) == 0) {
+		cd->int_status &= ~CY_INT_MODE_CHANGE;
+		dev_dbg(dev, "%s: finish mode switch m=%d -> m=%d\n",
+				__func__, cd->mode, cur_mode);
+		cd->mode = cur_mode;
+		wake_up(&cd->wait_q);
+		goto cyttsp4_irq_handshake;
+	}
+
+	/* compare current core mode to current device mode */
+	dev_vdbg(dev, "%s: cd->mode=%d cur_mode=%d\n",
+			__func__, cd->mode, cur_mode);
+	if ((mode[0] & CY_HST_MODE_CHANGE) == 0 && cd->mode != cur_mode) {
+		/* Unexpected mode change occurred */
+		dev_err(dev, "%s %d->%d 0x%x\n", __func__, cd->mode,
+				cur_mode, cd->int_status);
+		dev_dbg(dev, "%s: Unexpected mode change, startup\n",
+				__func__);
+		cyttsp4_queue_startup_(cd);
+		goto cyttsp4_irq_exit;
+	}
+
+	/* Expecting command complete interrupt */
+	dev_vdbg(dev, "%s: command byte:0x%x\n", __func__, mode[cmd_ofs]);
+	if ((cd->int_status & CY_INT_EXEC_CMD)
+			&& mode[cmd_ofs] & CY_CMD_COMPLETE) {
+		cd->int_status &= ~CY_INT_EXEC_CMD;
+		dev_vdbg(dev, "%s: Received command complete interrupt\n",
+				__func__);
+		wake_up(&cd->wait_q);
+		/*
+		 * It is possible to receive a single interrupt for
+		 * command complete and touch/button status report.
+		 * Continue processing for a possible status report.
+		 */
+	}
+
+	/* This should be status report, read status regs */
+	if (cd->mode == CY_MODE_OPERATIONAL) {
+		dev_vdbg(dev, "%s: Read status registers\n", __func__);
+		rc = cyttsp4_load_status_regs(cd);
+		if (rc < 0)
+			dev_err(dev, "%s: fail read mode regs r=%d\n",
+				__func__, rc);
+	}
+
+	cyttsp4_mt_attention(cd);
+
+cyttsp4_irq_handshake:
+	/* handshake the event */
+	dev_vdbg(dev, "%s: Handshake mode=0x%02X r=%d\n",
+			__func__, mode[0], rc);
+	rc = cyttsp4_handshake(cd, mode[0]);
+	if (rc < 0)
+		dev_err(dev, "%s: Fail handshake mode=0x%02X r=%d\n",
+				__func__, mode[0], rc);
+
+	/*
+	 * a non-zero udelay period is required for using
+	 * IRQF_TRIGGER_LOW in order to delay until the
+	 * device completes isr deassert
+	 */
+	udelay(cd->cpdata->level_irq_udelay);
+
+cyttsp4_irq_exit:
+	mutex_unlock(&cd->system_lock);
+	return IRQ_HANDLED;
+}
+
+static void cyttsp4_start_wd_timer(struct cyttsp4 *cd)
+{
+	if (!CY_WATCHDOG_TIMEOUT)
+		return;
+
+	mod_timer(&cd->watchdog_timer, jiffies +
+			msecs_to_jiffies(CY_WATCHDOG_TIMEOUT));
+}
+
+static void cyttsp4_stop_wd_timer(struct cyttsp4 *cd)
+{
+	if (!CY_WATCHDOG_TIMEOUT)
+		return;
+
+	/*
+	 * Ensure we wait until the watchdog timer
+	 * running on a different CPU finishes
+	 */
+	timer_shutdown_sync(&cd->watchdog_timer);
+	cancel_work_sync(&cd->watchdog_work);
+}
+
+static void cyttsp4_watchdog_timer(struct timer_list *t)
+{
+	struct cyttsp4 *cd = from_timer(cd, t, watchdog_timer);
+
+	dev_vdbg(cd->dev, "%s: Watchdog timer triggered\n", __func__);
+
+	schedule_work(&cd->watchdog_work);
+
+	return;
+}
+
+static int cyttsp4_request_exclusive(struct cyttsp4 *cd, void *ownptr,
+		int timeout_ms)
+{
+	int t = msecs_to_jiffies(timeout_ms);
+	bool with_timeout = (timeout_ms != 0);
+
+	mutex_lock(&cd->system_lock);
+	if (!cd->exclusive_dev && cd->exclusive_waits == 0) {
+		cd->exclusive_dev = ownptr;
+		goto exit;
+	}
+
+	cd->exclusive_waits++;
+wait:
+	mutex_unlock(&cd->system_lock);
+	if (with_timeout) {
+		t = wait_event_timeout(cd->wait_q, !cd->exclusive_dev, t);
+		if (IS_TMO(t)) {
+			dev_err(cd->dev, "%s: tmo waiting exclusive access\n",
+				__func__);
+			mutex_lock(&cd->system_lock);
+			cd->exclusive_waits--;
+			mutex_unlock(&cd->system_lock);
+			return -ETIME;
+		}
+	} else {
+		wait_event(cd->wait_q, !cd->exclusive_dev);
+	}
+	mutex_lock(&cd->system_lock);
+	if (cd->exclusive_dev)
+		goto wait;
+	cd->exclusive_dev = ownptr;
+	cd->exclusive_waits--;
+exit:
+	mutex_unlock(&cd->system_lock);
+
+	return 0;
+}
+
+/*
+ * returns error if was not owned
+ */
+static int cyttsp4_release_exclusive(struct cyttsp4 *cd, void *ownptr)
+{
+	mutex_lock(&cd->system_lock);
+	if (cd->exclusive_dev != ownptr) {
+		mutex_unlock(&cd->system_lock);
+		return -EINVAL;
+	}
+
+	dev_vdbg(cd->dev, "%s: exclusive_dev %p freed\n",
+		__func__, cd->exclusive_dev);
+	cd->exclusive_dev = NULL;
+	wake_up(&cd->wait_q);
+	mutex_unlock(&cd->system_lock);
+	return 0;
+}
+
+static int cyttsp4_wait_bl_heartbeat(struct cyttsp4 *cd)
+{
+	long t;
+	int rc = 0;
+
+	/* wait heartbeat */
+	dev_vdbg(cd->dev, "%s: wait heartbeat...\n", __func__);
+	t = wait_event_timeout(cd->wait_q, cd->mode == CY_MODE_BOOTLOADER,
+			msecs_to_jiffies(CY_CORE_RESET_AND_WAIT_TIMEOUT));
+	if (IS_TMO(t)) {
+		dev_err(cd->dev, "%s: tmo waiting bl heartbeat cd->mode=%d\n",
+			__func__, cd->mode);
+		rc = -ETIME;
+	}
+
+	return rc;
+}
+
+static int cyttsp4_wait_sysinfo_mode(struct cyttsp4 *cd)
+{
+	long t;
+
+	dev_vdbg(cd->dev, "%s: wait sysinfo...\n", __func__);
+
+	t = wait_event_timeout(cd->wait_q, cd->mode == CY_MODE_SYSINFO,
+			msecs_to_jiffies(CY_CORE_MODE_CHANGE_TIMEOUT));
+	if (IS_TMO(t)) {
+		dev_err(cd->dev, "%s: tmo waiting exit bl cd->mode=%d\n",
+			__func__, cd->mode);
+		mutex_lock(&cd->system_lock);
+		cd->int_status &= ~CY_INT_MODE_CHANGE;
+		mutex_unlock(&cd->system_lock);
+		return -ETIME;
+	}
+
+	return 0;
+}
+
+static int cyttsp4_reset_and_wait(struct cyttsp4 *cd)
+{
+	int rc;
+
+	/* reset hardware */
+	mutex_lock(&cd->system_lock);
+	dev_dbg(cd->dev, "%s: reset hw...\n", __func__);
+	rc = cyttsp4_hw_reset(cd);
+	cd->mode = CY_MODE_UNKNOWN;
+	mutex_unlock(&cd->system_lock);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s:Fail hw reset r=%d\n", __func__, rc);
+		return rc;
+	}
+
+	return cyttsp4_wait_bl_heartbeat(cd);
+}
+
+/*
+ * returns err if refused or timeout; block until mode change complete
+ * bit is set (mode change interrupt)
+ */
+static int cyttsp4_set_mode(struct cyttsp4 *cd, int new_mode)
+{
+	u8 new_dev_mode;
+	u8 mode;
+	long t;
+	int rc;
+
+	switch (new_mode) {
+	case CY_MODE_OPERATIONAL:
+		new_dev_mode = CY_HST_OPERATE;
+		break;
+	case CY_MODE_SYSINFO:
+		new_dev_mode = CY_HST_SYSINFO;
+		break;
+	case CY_MODE_CAT:
+		new_dev_mode = CY_HST_CAT;
+		break;
+	default:
+		dev_err(cd->dev, "%s: invalid mode: %02X(%d)\n",
+			__func__, new_mode, new_mode);
+		return -EINVAL;
+	}
+
+	/* change mode */
+	dev_dbg(cd->dev, "%s: %s=%p new_dev_mode=%02X new_mode=%d\n",
+			__func__, "have exclusive", cd->exclusive_dev,
+			new_dev_mode, new_mode);
+
+	mutex_lock(&cd->system_lock);
+	rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode);
+	if (rc < 0) {
+		mutex_unlock(&cd->system_lock);
+		dev_err(cd->dev, "%s: Fail read mode r=%d\n",
+			__func__, rc);
+		goto exit;
+	}
+
+	/* Clear device mode bits and set to new mode */
+	mode &= ~CY_HST_MODE;
+	mode |= new_dev_mode | CY_HST_MODE_CHANGE;
+
+	cd->int_status |= CY_INT_MODE_CHANGE;
+	rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(mode), &mode);
+	mutex_unlock(&cd->system_lock);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: Fail write mode change r=%d\n",
+				__func__, rc);
+		goto exit;
+	}
+
+	/* wait for mode change done interrupt */
+	t = wait_event_timeout(cd->wait_q,
+			(cd->int_status & CY_INT_MODE_CHANGE) == 0,
+			msecs_to_jiffies(CY_CORE_MODE_CHANGE_TIMEOUT));
+	dev_dbg(cd->dev, "%s: back from wait t=%ld cd->mode=%d\n",
+			__func__, t, cd->mode);
+
+	if (IS_TMO(t)) {
+		dev_err(cd->dev, "%s: %s\n", __func__,
+				"tmo waiting mode change");
+		mutex_lock(&cd->system_lock);
+		cd->int_status &= ~CY_INT_MODE_CHANGE;
+		mutex_unlock(&cd->system_lock);
+		rc = -EINVAL;
+	}
+
+exit:
+	return rc;
+}
+
+static void cyttsp4_watchdog_work(struct work_struct *work)
+{
+	struct cyttsp4 *cd =
+		container_of(work, struct cyttsp4, watchdog_work);
+	u8 *mode;
+	int retval;
+
+	mutex_lock(&cd->system_lock);
+	retval = cyttsp4_load_status_regs(cd);
+	if (retval < 0) {
+		dev_err(cd->dev,
+			"%s: failed to access device in watchdog timer r=%d\n",
+			__func__, retval);
+		cyttsp4_queue_startup_(cd);
+		goto cyttsp4_timer_watchdog_exit_error;
+	}
+	mode = &cd->sysinfo.xy_mode[CY_REG_BASE];
+	if (IS_BOOTLOADER(mode[0], mode[1])) {
+		dev_err(cd->dev,
+			"%s: device found in bootloader mode when operational mode\n",
+			__func__);
+		cyttsp4_queue_startup_(cd);
+		goto cyttsp4_timer_watchdog_exit_error;
+	}
+
+	cyttsp4_start_wd_timer(cd);
+cyttsp4_timer_watchdog_exit_error:
+	mutex_unlock(&cd->system_lock);
+	return;
+}
+
+static int cyttsp4_core_sleep_(struct cyttsp4 *cd)
+{
+	enum cyttsp4_sleep_state ss = SS_SLEEP_ON;
+	enum cyttsp4_int_state int_status = CY_INT_IGNORE;
+	int rc = 0;
+	u8 mode[2];
+
+	/* Already in sleep mode? */
+	mutex_lock(&cd->system_lock);
+	if (cd->sleep_state == SS_SLEEP_ON) {
+		mutex_unlock(&cd->system_lock);
+		return 0;
+	}
+	cd->sleep_state = SS_SLEEPING;
+	mutex_unlock(&cd->system_lock);
+
+	cyttsp4_stop_wd_timer(cd);
+
+	/* Wait until currently running IRQ handler exits and disable IRQ */
+	disable_irq(cd->irq);
+
+	dev_vdbg(cd->dev, "%s: write DEEP SLEEP...\n", __func__);
+	mutex_lock(&cd->system_lock);
+	rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode);
+	if (rc) {
+		mutex_unlock(&cd->system_lock);
+		dev_err(cd->dev, "%s: Fail read adapter r=%d\n", __func__, rc);
+		goto error;
+	}
+
+	if (IS_BOOTLOADER(mode[0], mode[1])) {
+		mutex_unlock(&cd->system_lock);
+		dev_err(cd->dev, "%s: Device in BOOTLOADER mode.\n", __func__);
+		rc = -EINVAL;
+		goto error;
+	}
+
+	mode[0] |= CY_HST_SLEEP;
+	rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(mode[0]), &mode[0]);
+	mutex_unlock(&cd->system_lock);
+	if (rc) {
+		dev_err(cd->dev, "%s: Fail write adapter r=%d\n", __func__, rc);
+		goto error;
+	}
+	dev_vdbg(cd->dev, "%s: write DEEP SLEEP succeeded\n", __func__);
+
+	if (cd->cpdata->power) {
+		dev_dbg(cd->dev, "%s: Power down HW\n", __func__);
+		rc = cd->cpdata->power(cd->cpdata, 0, cd->dev, &cd->ignore_irq);
+	} else {
+		dev_dbg(cd->dev, "%s: No power function\n", __func__);
+		rc = 0;
+	}
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: HW Power down fails r=%d\n",
+				__func__, rc);
+		goto error;
+	}
+
+	/* Give time to FW to sleep */
+	msleep(50);
+
+	goto exit;
+
+error:
+	ss = SS_SLEEP_OFF;
+	int_status = CY_INT_NONE;
+	cyttsp4_start_wd_timer(cd);
+
+exit:
+	mutex_lock(&cd->system_lock);
+	cd->sleep_state = ss;
+	cd->int_status |= int_status;
+	mutex_unlock(&cd->system_lock);
+	enable_irq(cd->irq);
+	return rc;
+}
+
+static int cyttsp4_startup_(struct cyttsp4 *cd)
+{
+	int retry = CY_CORE_STARTUP_RETRY_COUNT;
+	int rc;
+
+	cyttsp4_stop_wd_timer(cd);
+
+reset:
+	if (retry != CY_CORE_STARTUP_RETRY_COUNT)
+		dev_dbg(cd->dev, "%s: Retry %d\n", __func__,
+			CY_CORE_STARTUP_RETRY_COUNT - retry);
+
+	/* reset hardware and wait for heartbeat */
+	rc = cyttsp4_reset_and_wait(cd);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: Error on h/w reset r=%d\n", __func__, rc);
+		if (retry--)
+			goto reset;
+		goto exit;
+	}
+
+	/* exit bl into sysinfo mode */
+	dev_vdbg(cd->dev, "%s: write exit ldr...\n", __func__);
+	mutex_lock(&cd->system_lock);
+	cd->int_status &= ~CY_INT_IGNORE;
+	cd->int_status |= CY_INT_MODE_CHANGE;
+
+	rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(ldr_exit),
+			(u8 *)ldr_exit);
+	mutex_unlock(&cd->system_lock);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: Fail write r=%d\n", __func__, rc);
+		if (retry--)
+			goto reset;
+		goto exit;
+	}
+
+	rc = cyttsp4_wait_sysinfo_mode(cd);
+	if (rc < 0) {
+		u8 buf[sizeof(ldr_err_app)];
+		int rc1;
+
+		/* Check for invalid/corrupted touch application */
+		rc1 = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(ldr_err_app),
+				buf);
+		if (rc1) {
+			dev_err(cd->dev, "%s: Fail read r=%d\n", __func__, rc1);
+		} else if (!memcmp(buf, ldr_err_app, sizeof(ldr_err_app))) {
+			dev_err(cd->dev, "%s: Error launching touch application\n",
+				__func__);
+			mutex_lock(&cd->system_lock);
+			cd->invalid_touch_app = true;
+			mutex_unlock(&cd->system_lock);
+			goto exit_no_wd;
+		}
+
+		if (retry--)
+			goto reset;
+		goto exit;
+	}
+
+	mutex_lock(&cd->system_lock);
+	cd->invalid_touch_app = false;
+	mutex_unlock(&cd->system_lock);
+
+	/* read sysinfo data */
+	dev_vdbg(cd->dev, "%s: get sysinfo regs..\n", __func__);
+	rc = cyttsp4_get_sysinfo_regs(cd);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: failed to get sysinfo regs rc=%d\n",
+			__func__, rc);
+		if (retry--)
+			goto reset;
+		goto exit;
+	}
+
+	rc = cyttsp4_set_mode(cd, CY_MODE_OPERATIONAL);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: failed to set mode to operational rc=%d\n",
+			__func__, rc);
+		if (retry--)
+			goto reset;
+		goto exit;
+	}
+
+	cyttsp4_lift_all(&cd->md);
+
+	/* restore to sleep if was suspended */
+	mutex_lock(&cd->system_lock);
+	if (cd->sleep_state == SS_SLEEP_ON) {
+		cd->sleep_state = SS_SLEEP_OFF;
+		mutex_unlock(&cd->system_lock);
+		cyttsp4_core_sleep_(cd);
+		goto exit_no_wd;
+	}
+	mutex_unlock(&cd->system_lock);
+
+exit:
+	cyttsp4_start_wd_timer(cd);
+exit_no_wd:
+	return rc;
+}
+
+static int cyttsp4_startup(struct cyttsp4 *cd)
+{
+	int rc;
+
+	mutex_lock(&cd->system_lock);
+	cd->startup_state = STARTUP_RUNNING;
+	mutex_unlock(&cd->system_lock);
+
+	rc = cyttsp4_request_exclusive(cd, cd->dev,
+			CY_CORE_REQUEST_EXCLUSIVE_TIMEOUT);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail get exclusive ex=%p own=%p\n",
+				__func__, cd->exclusive_dev, cd->dev);
+		goto exit;
+	}
+
+	rc = cyttsp4_startup_(cd);
+
+	if (cyttsp4_release_exclusive(cd, cd->dev) < 0)
+		/* Don't return fail code, mode is already changed. */
+		dev_err(cd->dev, "%s: fail to release exclusive\n", __func__);
+	else
+		dev_vdbg(cd->dev, "%s: pass release exclusive\n", __func__);
+
+exit:
+	mutex_lock(&cd->system_lock);
+	cd->startup_state = STARTUP_NONE;
+	mutex_unlock(&cd->system_lock);
+
+	/* Wake the waiters for end of startup */
+	wake_up(&cd->wait_q);
+
+	return rc;
+}
+
+static void cyttsp4_startup_work_function(struct work_struct *work)
+{
+	struct cyttsp4 *cd =  container_of(work, struct cyttsp4, startup_work);
+	int rc;
+
+	rc = cyttsp4_startup(cd);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: Fail queued startup r=%d\n",
+			__func__, rc);
+}
+
+static void cyttsp4_free_si_ptrs(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+
+	if (!si)
+		return;
+
+	kfree(si->si_ptrs.cydata);
+	kfree(si->si_ptrs.test);
+	kfree(si->si_ptrs.pcfg);
+	kfree(si->si_ptrs.opcfg);
+	kfree(si->si_ptrs.ddata);
+	kfree(si->si_ptrs.mdata);
+	kfree(si->btn);
+	kfree(si->xy_mode);
+	kfree(si->xy_data);
+	kfree(si->btn_rec_data);
+}
+
+static int cyttsp4_core_sleep(struct cyttsp4 *cd)
+{
+	int rc;
+
+	rc = cyttsp4_request_exclusive(cd, cd->dev,
+			CY_CORE_SLEEP_REQUEST_EXCLUSIVE_TIMEOUT);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail get exclusive ex=%p own=%p\n",
+				__func__, cd->exclusive_dev, cd->dev);
+		return 0;
+	}
+
+	rc = cyttsp4_core_sleep_(cd);
+
+	if (cyttsp4_release_exclusive(cd, cd->dev) < 0)
+		dev_err(cd->dev, "%s: fail to release exclusive\n", __func__);
+	else
+		dev_vdbg(cd->dev, "%s: pass release exclusive\n", __func__);
+
+	return rc;
+}
+
+static int cyttsp4_core_wake_(struct cyttsp4 *cd)
+{
+	struct device *dev = cd->dev;
+	int rc;
+	u8 mode;
+	int t;
+
+	/* Already woken? */
+	mutex_lock(&cd->system_lock);
+	if (cd->sleep_state == SS_SLEEP_OFF) {
+		mutex_unlock(&cd->system_lock);
+		return 0;
+	}
+	cd->int_status &= ~CY_INT_IGNORE;
+	cd->int_status |= CY_INT_AWAKE;
+	cd->sleep_state = SS_WAKING;
+
+	if (cd->cpdata->power) {
+		dev_dbg(dev, "%s: Power up HW\n", __func__);
+		rc = cd->cpdata->power(cd->cpdata, 1, dev, &cd->ignore_irq);
+	} else {
+		dev_dbg(dev, "%s: No power function\n", __func__);
+		rc = -ENOSYS;
+	}
+	if (rc < 0) {
+		dev_err(dev, "%s: HW Power up fails r=%d\n",
+				__func__, rc);
+
+		/* Initiate a read transaction to wake up */
+		cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode);
+	} else
+		dev_vdbg(cd->dev, "%s: HW power up succeeds\n",
+			__func__);
+	mutex_unlock(&cd->system_lock);
+
+	t = wait_event_timeout(cd->wait_q,
+			(cd->int_status & CY_INT_AWAKE) == 0,
+			msecs_to_jiffies(CY_CORE_WAKEUP_TIMEOUT));
+	if (IS_TMO(t)) {
+		dev_err(dev, "%s: TMO waiting for wakeup\n", __func__);
+		mutex_lock(&cd->system_lock);
+		cd->int_status &= ~CY_INT_AWAKE;
+		/* Try starting up */
+		cyttsp4_queue_startup_(cd);
+		mutex_unlock(&cd->system_lock);
+	}
+
+	mutex_lock(&cd->system_lock);
+	cd->sleep_state = SS_SLEEP_OFF;
+	mutex_unlock(&cd->system_lock);
+
+	cyttsp4_start_wd_timer(cd);
+
+	return 0;
+}
+
+static int cyttsp4_core_wake(struct cyttsp4 *cd)
+{
+	int rc;
+
+	rc = cyttsp4_request_exclusive(cd, cd->dev,
+			CY_CORE_REQUEST_EXCLUSIVE_TIMEOUT);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail get exclusive ex=%p own=%p\n",
+				__func__, cd->exclusive_dev, cd->dev);
+		return 0;
+	}
+
+	rc = cyttsp4_core_wake_(cd);
+
+	if (cyttsp4_release_exclusive(cd, cd->dev) < 0)
+		dev_err(cd->dev, "%s: fail to release exclusive\n", __func__);
+	else
+		dev_vdbg(cd->dev, "%s: pass release exclusive\n", __func__);
+
+	return rc;
+}
+
+static int cyttsp4_core_suspend(struct device *dev)
+{
+	struct cyttsp4 *cd = dev_get_drvdata(dev);
+	struct cyttsp4_mt_data *md = &cd->md;
+	int rc;
+
+	md->is_suspended = true;
+
+	rc = cyttsp4_core_sleep(cd);
+	if (rc < 0) {
+		dev_err(dev, "%s: Error on sleep\n", __func__);
+		return -EAGAIN;
+	}
+	return 0;
+}
+
+static int cyttsp4_core_resume(struct device *dev)
+{
+	struct cyttsp4 *cd = dev_get_drvdata(dev);
+	struct cyttsp4_mt_data *md = &cd->md;
+	int rc;
+
+	md->is_suspended = false;
+
+	rc = cyttsp4_core_wake(cd);
+	if (rc < 0) {
+		dev_err(dev, "%s: Error on wake\n", __func__);
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
+EXPORT_GPL_RUNTIME_DEV_PM_OPS(cyttsp4_pm_ops,
+			      cyttsp4_core_suspend, cyttsp4_core_resume, NULL);
+
+static int cyttsp4_mt_open(struct input_dev *input)
+{
+	pm_runtime_get(input->dev.parent);
+	return 0;
+}
+
+static void cyttsp4_mt_close(struct input_dev *input)
+{
+	struct cyttsp4_mt_data *md = input_get_drvdata(input);
+	mutex_lock(&md->report_lock);
+	if (!md->is_suspended)
+		pm_runtime_put(input->dev.parent);
+	mutex_unlock(&md->report_lock);
+}
+
+
+static int cyttsp4_setup_input_device(struct cyttsp4 *cd)
+{
+	struct device *dev = cd->dev;
+	struct cyttsp4_mt_data *md = &cd->md;
+	int signal = CY_IGNORE_VALUE;
+	int max_x, max_y, max_p, min, max;
+	int max_x_tmp, max_y_tmp;
+	int i;
+	int rc;
+
+	dev_vdbg(dev, "%s: Initialize event signals\n", __func__);
+	__set_bit(EV_ABS, md->input->evbit);
+	__set_bit(EV_REL, md->input->evbit);
+	__set_bit(EV_KEY, md->input->evbit);
+
+	max_x_tmp = md->si->si_ofs.max_x;
+	max_y_tmp = md->si->si_ofs.max_y;
+
+	/* get maximum values from the sysinfo data */
+	if (md->pdata->flags & CY_FLAG_FLIP) {
+		max_x = max_y_tmp - 1;
+		max_y = max_x_tmp - 1;
+	} else {
+		max_x = max_x_tmp - 1;
+		max_y = max_y_tmp - 1;
+	}
+	max_p = md->si->si_ofs.max_p;
+
+	/* set event signal capabilities */
+	for (i = 0; i < (md->pdata->frmwrk->size / CY_NUM_ABS_SET); i++) {
+		signal = md->pdata->frmwrk->abs
+			[(i * CY_NUM_ABS_SET) + CY_SIGNAL_OST];
+		if (signal != CY_IGNORE_VALUE) {
+			__set_bit(signal, md->input->absbit);
+			min = md->pdata->frmwrk->abs
+				[(i * CY_NUM_ABS_SET) + CY_MIN_OST];
+			max = md->pdata->frmwrk->abs
+				[(i * CY_NUM_ABS_SET) + CY_MAX_OST];
+			if (i == CY_ABS_ID_OST) {
+				/* shift track ids down to start at 0 */
+				max = max - min;
+				min = min - min;
+			} else if (i == CY_ABS_X_OST)
+				max = max_x;
+			else if (i == CY_ABS_Y_OST)
+				max = max_y;
+			else if (i == CY_ABS_P_OST)
+				max = max_p;
+			input_set_abs_params(md->input, signal, min, max,
+				md->pdata->frmwrk->abs
+				[(i * CY_NUM_ABS_SET) + CY_FUZZ_OST],
+				md->pdata->frmwrk->abs
+				[(i * CY_NUM_ABS_SET) + CY_FLAT_OST]);
+			dev_dbg(dev, "%s: register signal=%02X min=%d max=%d\n",
+				__func__, signal, min, max);
+			if ((i == CY_ABS_ID_OST) &&
+				(md->si->si_ofs.tch_rec_size <
+				CY_TMA4XX_TCH_REC_SIZE))
+				break;
+		}
+	}
+
+	input_mt_init_slots(md->input, md->si->si_ofs.tch_abs[CY_TCH_T].max,
+			INPUT_MT_DIRECT);
+	rc = input_register_device(md->input);
+	if (rc < 0)
+		dev_err(dev, "%s: Error, failed register input device r=%d\n",
+			__func__, rc);
+	return rc;
+}
+
+static int cyttsp4_mt_probe(struct cyttsp4 *cd)
+{
+	struct device *dev = cd->dev;
+	struct cyttsp4_mt_data *md = &cd->md;
+	struct cyttsp4_mt_platform_data *pdata = cd->pdata->mt_pdata;
+	int rc = 0;
+
+	mutex_init(&md->report_lock);
+	md->pdata = pdata;
+	/* Create the input device and register it. */
+	dev_vdbg(dev, "%s: Create the input device and register it\n",
+		__func__);
+	md->input = input_allocate_device();
+	if (md->input == NULL) {
+		dev_err(dev, "%s: Error, failed to allocate input device\n",
+			__func__);
+		rc = -ENOSYS;
+		goto error_alloc_failed;
+	}
+
+	md->input->name = pdata->inp_dev_name;
+	scnprintf(md->phys, sizeof(md->phys)-1, "%s", dev_name(dev));
+	md->input->phys = md->phys;
+	md->input->id.bustype = cd->bus_ops->bustype;
+	md->input->dev.parent = dev;
+	md->input->open = cyttsp4_mt_open;
+	md->input->close = cyttsp4_mt_close;
+	input_set_drvdata(md->input, md);
+
+	/* get sysinfo */
+	md->si = &cd->sysinfo;
+
+	rc = cyttsp4_setup_input_device(cd);
+	if (rc)
+		goto error_init_input;
+
+	return 0;
+
+error_init_input:
+	input_free_device(md->input);
+error_alloc_failed:
+	dev_err(dev, "%s failed.\n", __func__);
+	return rc;
+}
+
+struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
+		struct device *dev, u16 irq, size_t xfer_buf_size)
+{
+	struct cyttsp4 *cd;
+	struct cyttsp4_platform_data *pdata = dev_get_platdata(dev);
+	unsigned long irq_flags;
+	int rc = 0;
+
+	if (!pdata || !pdata->core_pdata || !pdata->mt_pdata) {
+		dev_err(dev, "%s: Missing platform data\n", __func__);
+		rc = -ENODEV;
+		goto error_no_pdata;
+	}
+
+	cd = kzalloc(sizeof(*cd), GFP_KERNEL);
+	if (!cd) {
+		dev_err(dev, "%s: Error, kzalloc\n", __func__);
+		rc = -ENOMEM;
+		goto error_alloc_data;
+	}
+
+	cd->xfer_buf = kzalloc(xfer_buf_size, GFP_KERNEL);
+	if (!cd->xfer_buf) {
+		dev_err(dev, "%s: Error, kzalloc\n", __func__);
+		rc = -ENOMEM;
+		goto error_free_cd;
+	}
+
+	/* Initialize device info */
+	cd->dev = dev;
+	cd->pdata = pdata;
+	cd->cpdata = pdata->core_pdata;
+	cd->bus_ops = ops;
+
+	/* Initialize mutexes and spinlocks */
+	mutex_init(&cd->system_lock);
+	mutex_init(&cd->adap_lock);
+
+	/* Initialize wait queue */
+	init_waitqueue_head(&cd->wait_q);
+
+	/* Initialize works */
+	INIT_WORK(&cd->startup_work, cyttsp4_startup_work_function);
+	INIT_WORK(&cd->watchdog_work, cyttsp4_watchdog_work);
+
+	/* Initialize IRQ */
+	cd->irq = gpio_to_irq(cd->cpdata->irq_gpio);
+	if (cd->irq < 0) {
+		rc = -EINVAL;
+		goto error_free_xfer;
+	}
+
+	dev_set_drvdata(dev, cd);
+
+	/* Call platform init function */
+	if (cd->cpdata->init) {
+		dev_dbg(cd->dev, "%s: Init HW\n", __func__);
+		rc = cd->cpdata->init(cd->cpdata, 1, cd->dev);
+	} else {
+		dev_dbg(cd->dev, "%s: No HW INIT function\n", __func__);
+		rc = 0;
+	}
+	if (rc < 0)
+		dev_err(cd->dev, "%s: HW Init fail r=%d\n", __func__, rc);
+
+	dev_dbg(dev, "%s: initialize threaded irq=%d\n", __func__, cd->irq);
+	if (cd->cpdata->level_irq_udelay > 0)
+		/* use level triggered interrupts */
+		irq_flags = IRQF_TRIGGER_LOW | IRQF_ONESHOT;
+	else
+		/* use edge triggered interrupts */
+		irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
+
+	rc = request_threaded_irq(cd->irq, NULL, cyttsp4_irq, irq_flags,
+		dev_name(dev), cd);
+	if (rc < 0) {
+		dev_err(dev, "%s: Error, could not request irq\n", __func__);
+		goto error_request_irq;
+	}
+
+	/* Setup watchdog timer */
+	timer_setup(&cd->watchdog_timer, cyttsp4_watchdog_timer, 0);
+
+	/*
+	 * call startup directly to ensure that the device
+	 * is tested before leaving the probe
+	 */
+	rc = cyttsp4_startup(cd);
+
+	/* Do not fail probe if startup fails but the device is detected */
+	if (rc < 0 && cd->mode == CY_MODE_UNKNOWN) {
+		dev_err(cd->dev, "%s: Fail initial startup r=%d\n",
+			__func__, rc);
+		goto error_startup;
+	}
+
+	rc = cyttsp4_mt_probe(cd);
+	if (rc < 0) {
+		dev_err(dev, "%s: Error, fail mt probe\n", __func__);
+		goto error_startup;
+	}
+
+	pm_runtime_enable(dev);
+
+	return cd;
+
+error_startup:
+	cancel_work_sync(&cd->startup_work);
+	cyttsp4_stop_wd_timer(cd);
+	pm_runtime_disable(dev);
+	cyttsp4_free_si_ptrs(cd);
+	free_irq(cd->irq, cd);
+error_request_irq:
+	if (cd->cpdata->init)
+		cd->cpdata->init(cd->cpdata, 0, dev);
+error_free_xfer:
+	kfree(cd->xfer_buf);
+error_free_cd:
+	kfree(cd);
+error_alloc_data:
+error_no_pdata:
+	dev_err(dev, "%s failed.\n", __func__);
+	return ERR_PTR(rc);
+}
+EXPORT_SYMBOL_GPL(cyttsp4_probe);
+
+static void cyttsp4_mt_release(struct cyttsp4_mt_data *md)
+{
+	input_unregister_device(md->input);
+	input_set_drvdata(md->input, NULL);
+}
+
+int cyttsp4_remove(struct cyttsp4 *cd)
+{
+	struct device *dev = cd->dev;
+
+	cyttsp4_mt_release(&cd->md);
+
+	/*
+	 * Suspend the device before freeing the startup_work and stopping
+	 * the watchdog since sleep function restarts watchdog on failure
+	 */
+	pm_runtime_suspend(dev);
+	pm_runtime_disable(dev);
+
+	cancel_work_sync(&cd->startup_work);
+
+	cyttsp4_stop_wd_timer(cd);
+
+	free_irq(cd->irq, cd);
+	if (cd->cpdata->init)
+		cd->cpdata->init(cd->cpdata, 0, dev);
+	cyttsp4_free_si_ptrs(cd);
+	kfree(cd);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(cyttsp4_remove);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen core driver");
+MODULE_AUTHOR("Cypress");
diff --git a/drivers/input/touchscreen/cyttsp4_core.h b/drivers/input/touchscreen/cyttsp4_core.h
new file mode 100644
index 000000000000..6262f6e45075
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp4_core.h
@@ -0,0 +1,448 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * cyttsp4_core.h
+ * Cypress TrueTouch(TM) Standard Product V4 Core driver module.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2012 Cypress Semiconductor
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#ifndef _LINUX_CYTTSP4_CORE_H
+#define _LINUX_CYTTSP4_CORE_H
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/module.h>
+#include <linux/stringify.h>
+#include <linux/types.h>
+#include <linux/platform_data/cyttsp4.h>
+
+#define CY_REG_BASE			0x00
+
+#define CY_POST_CODEL_WDG_RST		0x01
+#define CY_POST_CODEL_CFG_DATA_CRC_FAIL	0x02
+#define CY_POST_CODEL_PANEL_TEST_FAIL	0x04
+
+#define CY_NUM_BTN_PER_REG		4
+
+/* touch record system information offset masks and shifts */
+#define CY_BYTE_OFS_MASK		0x1F
+#define CY_BOFS_MASK			0xE0
+#define CY_BOFS_SHIFT			5
+
+#define CY_TMA1036_TCH_REC_SIZE		6
+#define CY_TMA4XX_TCH_REC_SIZE		9
+#define CY_TMA1036_MAX_TCH		0x0E
+#define CY_TMA4XX_MAX_TCH		0x1E
+
+#define CY_NORMAL_ORIGIN		0	/* upper, left corner */
+#define CY_INVERT_ORIGIN		1	/* lower, right corner */
+
+/* helpers */
+#define GET_NUM_TOUCHES(x)		((x) & 0x1F)
+#define IS_LARGE_AREA(x)		((x) & 0x20)
+#define IS_BAD_PKT(x)			((x) & 0x20)
+#define IS_BOOTLOADER(hst_mode, reset_detect)	\
+		((hst_mode) & 0x01 || (reset_detect) != 0)
+#define IS_TMO(t)			((t) == 0)
+
+
+enum cyttsp_cmd_bits {
+	CY_CMD_COMPLETE = (1 << 6),
+};
+
+/* Timeout in ms. */
+#define CY_WATCHDOG_TIMEOUT		1000
+
+#define CY_MAX_PRINT_SIZE		512
+#ifdef VERBOSE_DEBUG
+#define CY_MAX_PRBUF_SIZE		PIPE_BUF
+#define CY_PR_TRUNCATED			" truncated..."
+#endif
+
+enum cyttsp4_ic_grpnum {
+	CY_IC_GRPNUM_RESERVED,
+	CY_IC_GRPNUM_CMD_REGS,
+	CY_IC_GRPNUM_TCH_REP,
+	CY_IC_GRPNUM_DATA_REC,
+	CY_IC_GRPNUM_TEST_REC,
+	CY_IC_GRPNUM_PCFG_REC,
+	CY_IC_GRPNUM_TCH_PARM_VAL,
+	CY_IC_GRPNUM_TCH_PARM_SIZE,
+	CY_IC_GRPNUM_RESERVED1,
+	CY_IC_GRPNUM_RESERVED2,
+	CY_IC_GRPNUM_OPCFG_REC,
+	CY_IC_GRPNUM_DDATA_REC,
+	CY_IC_GRPNUM_MDATA_REC,
+	CY_IC_GRPNUM_TEST_REGS,
+	CY_IC_GRPNUM_BTN_KEYS,
+	CY_IC_GRPNUM_TTHE_REGS,
+	CY_IC_GRPNUM_NUM
+};
+
+enum cyttsp4_int_state {
+	CY_INT_NONE,
+	CY_INT_IGNORE      = (1 << 0),
+	CY_INT_MODE_CHANGE = (1 << 1),
+	CY_INT_EXEC_CMD    = (1 << 2),
+	CY_INT_AWAKE       = (1 << 3),
+};
+
+enum cyttsp4_mode {
+	CY_MODE_UNKNOWN,
+	CY_MODE_BOOTLOADER   = (1 << 1),
+	CY_MODE_OPERATIONAL  = (1 << 2),
+	CY_MODE_SYSINFO      = (1 << 3),
+	CY_MODE_CAT          = (1 << 4),
+	CY_MODE_STARTUP      = (1 << 5),
+	CY_MODE_LOADER       = (1 << 6),
+	CY_MODE_CHANGE_MODE  = (1 << 7),
+	CY_MODE_CHANGED      = (1 << 8),
+	CY_MODE_CMD_COMPLETE = (1 << 9),
+};
+
+enum cyttsp4_sleep_state {
+	SS_SLEEP_OFF,
+	SS_SLEEP_ON,
+	SS_SLEEPING,
+	SS_WAKING,
+};
+
+enum cyttsp4_startup_state {
+	STARTUP_NONE,
+	STARTUP_QUEUED,
+	STARTUP_RUNNING,
+};
+
+#define CY_NUM_REVCTRL			8
+struct cyttsp4_cydata {
+	u8 ttpidh;
+	u8 ttpidl;
+	u8 fw_ver_major;
+	u8 fw_ver_minor;
+	u8 revctrl[CY_NUM_REVCTRL];
+	u8 blver_major;
+	u8 blver_minor;
+	u8 jtag_si_id3;
+	u8 jtag_si_id2;
+	u8 jtag_si_id1;
+	u8 jtag_si_id0;
+	u8 mfgid_sz;
+	u8 cyito_idh;
+	u8 cyito_idl;
+	u8 cyito_verh;
+	u8 cyito_verl;
+	u8 ttsp_ver_major;
+	u8 ttsp_ver_minor;
+	u8 device_info;
+	u8 mfg_id[];
+} __packed;
+
+struct cyttsp4_test {
+	u8 post_codeh;
+	u8 post_codel;
+} __packed;
+
+struct cyttsp4_pcfg {
+	u8 electrodes_x;
+	u8 electrodes_y;
+	u8 len_xh;
+	u8 len_xl;
+	u8 len_yh;
+	u8 len_yl;
+	u8 res_xh;
+	u8 res_xl;
+	u8 res_yh;
+	u8 res_yl;
+	u8 max_zh;
+	u8 max_zl;
+	u8 panel_info0;
+} __packed;
+
+struct cyttsp4_tch_rec_params {
+	u8 loc;
+	u8 size;
+} __packed;
+
+#define CY_NUM_TCH_FIELDS		7
+#define CY_NUM_EXT_TCH_FIELDS		3
+struct cyttsp4_opcfg {
+	u8 cmd_ofs;
+	u8 rep_ofs;
+	u8 rep_szh;
+	u8 rep_szl;
+	u8 num_btns;
+	u8 tt_stat_ofs;
+	u8 obj_cfg0;
+	u8 max_tchs;
+	u8 tch_rec_size;
+	struct cyttsp4_tch_rec_params tch_rec_old[CY_NUM_TCH_FIELDS];
+	u8 btn_rec_size;	/* btn record size (in bytes) */
+	u8 btn_diff_ofs;	/* btn data loc, diff counts  */
+	u8 btn_diff_size;	/* btn size of diff counts (in bits) */
+	struct cyttsp4_tch_rec_params tch_rec_new[CY_NUM_EXT_TCH_FIELDS];
+} __packed;
+
+struct cyttsp4_sysinfo_ptr {
+	struct cyttsp4_cydata *cydata;
+	struct cyttsp4_test *test;
+	struct cyttsp4_pcfg *pcfg;
+	struct cyttsp4_opcfg *opcfg;
+	struct cyttsp4_ddata *ddata;
+	struct cyttsp4_mdata *mdata;
+} __packed;
+
+struct cyttsp4_sysinfo_data {
+	u8 hst_mode;
+	u8 reserved;
+	u8 map_szh;
+	u8 map_szl;
+	u8 cydata_ofsh;
+	u8 cydata_ofsl;
+	u8 test_ofsh;
+	u8 test_ofsl;
+	u8 pcfg_ofsh;
+	u8 pcfg_ofsl;
+	u8 opcfg_ofsh;
+	u8 opcfg_ofsl;
+	u8 ddata_ofsh;
+	u8 ddata_ofsl;
+	u8 mdata_ofsh;
+	u8 mdata_ofsl;
+} __packed;
+
+enum cyttsp4_tch_abs {	/* for ordering within the extracted touch data array */
+	CY_TCH_X,	/* X */
+	CY_TCH_Y,	/* Y */
+	CY_TCH_P,	/* P (Z) */
+	CY_TCH_T,	/* TOUCH ID */
+	CY_TCH_E,	/* EVENT ID */
+	CY_TCH_O,	/* OBJECT ID */
+	CY_TCH_W,	/* SIZE */
+	CY_TCH_MAJ,	/* TOUCH_MAJOR */
+	CY_TCH_MIN,	/* TOUCH_MINOR */
+	CY_TCH_OR,	/* ORIENTATION */
+	CY_TCH_NUM_ABS
+};
+
+struct cyttsp4_touch {
+	int abs[CY_TCH_NUM_ABS];
+};
+
+struct cyttsp4_tch_abs_params {
+	size_t ofs;	/* abs byte offset */
+	size_t size;	/* size in bits */
+	size_t max;	/* max value */
+	size_t bofs;	/* bit offset */
+};
+
+struct cyttsp4_sysinfo_ofs {
+	size_t chip_type;
+	size_t cmd_ofs;
+	size_t rep_ofs;
+	size_t rep_sz;
+	size_t num_btns;
+	size_t num_btn_regs;	/* ceil(num_btns/4) */
+	size_t tt_stat_ofs;
+	size_t tch_rec_size;
+	size_t obj_cfg0;
+	size_t max_tchs;
+	size_t mode_size;
+	size_t data_size;
+	size_t map_sz;
+	size_t max_x;
+	size_t x_origin;	/* left or right corner */
+	size_t max_y;
+	size_t y_origin;	/* upper or lower corner */
+	size_t max_p;
+	size_t cydata_ofs;
+	size_t test_ofs;
+	size_t pcfg_ofs;
+	size_t opcfg_ofs;
+	size_t ddata_ofs;
+	size_t mdata_ofs;
+	size_t cydata_size;
+	size_t test_size;
+	size_t pcfg_size;
+	size_t opcfg_size;
+	size_t ddata_size;
+	size_t mdata_size;
+	size_t btn_keys_size;
+	struct cyttsp4_tch_abs_params tch_abs[CY_TCH_NUM_ABS];
+	size_t btn_rec_size; /* btn record size (in bytes) */
+	size_t btn_diff_ofs;/* btn data loc ,diff counts, (Op-Mode byte ofs) */
+	size_t btn_diff_size;/* btn size of diff counts (in bits) */
+};
+
+enum cyttsp4_btn_state {
+	CY_BTN_RELEASED,
+	CY_BTN_PRESSED,
+	CY_BTN_NUM_STATE
+};
+
+struct cyttsp4_btn {
+	bool enabled;
+	int state;	/* CY_BTN_PRESSED, CY_BTN_RELEASED */
+	int key_code;
+};
+
+struct cyttsp4_sysinfo {
+	bool ready;
+	struct cyttsp4_sysinfo_data si_data;
+	struct cyttsp4_sysinfo_ptr si_ptrs;
+	struct cyttsp4_sysinfo_ofs si_ofs;
+	struct cyttsp4_btn *btn;	/* button states */
+	u8 *btn_rec_data;		/* button diff count data */
+	u8 *xy_mode;			/* operational mode and status regs */
+	u8 *xy_data;			/* operational touch regs */
+};
+
+struct cyttsp4_mt_data {
+	struct cyttsp4_mt_platform_data *pdata;
+	struct cyttsp4_sysinfo *si;
+	struct input_dev *input;
+	struct mutex report_lock;
+	bool is_suspended;
+	char phys[NAME_MAX];
+	int num_prv_tch;
+};
+
+struct cyttsp4 {
+	struct device *dev;
+	struct mutex system_lock;
+	struct mutex adap_lock;
+	enum cyttsp4_mode mode;
+	enum cyttsp4_sleep_state sleep_state;
+	enum cyttsp4_startup_state startup_state;
+	int int_status;
+	wait_queue_head_t wait_q;
+	int irq;
+	struct work_struct startup_work;
+	struct work_struct watchdog_work;
+	struct timer_list watchdog_timer;
+	struct cyttsp4_sysinfo sysinfo;
+	void *exclusive_dev;
+	int exclusive_waits;
+	atomic_t ignore_irq;
+	bool invalid_touch_app;
+	struct cyttsp4_mt_data md;
+	struct cyttsp4_platform_data *pdata;
+	struct cyttsp4_core_platform_data *cpdata;
+	const struct cyttsp4_bus_ops *bus_ops;
+	u8 *xfer_buf;
+#ifdef VERBOSE_DEBUG
+	u8 pr_buf[CY_MAX_PRBUF_SIZE];
+#endif
+};
+
+struct cyttsp4_bus_ops {
+	u16 bustype;
+	int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
+			const void *values);
+	int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
+			void *values);
+};
+
+enum cyttsp4_hst_mode_bits {
+	CY_HST_TOGGLE      = (1 << 7),
+	CY_HST_MODE_CHANGE = (1 << 3),
+	CY_HST_MODE        = (7 << 4),
+	CY_HST_OPERATE     = (0 << 4),
+	CY_HST_SYSINFO     = (1 << 4),
+	CY_HST_CAT         = (2 << 4),
+	CY_HST_LOWPOW      = (1 << 2),
+	CY_HST_SLEEP       = (1 << 1),
+	CY_HST_RESET       = (1 << 0),
+};
+
+/* abs settings */
+#define CY_IGNORE_VALUE			0xFFFF
+
+/* abs signal capabilities offsets in the frameworks array */
+enum cyttsp4_sig_caps {
+	CY_SIGNAL_OST,
+	CY_MIN_OST,
+	CY_MAX_OST,
+	CY_FUZZ_OST,
+	CY_FLAT_OST,
+	CY_NUM_ABS_SET	/* number of signal capability fields */
+};
+
+/* abs axis signal offsets in the framworks array  */
+enum cyttsp4_sig_ost {
+	CY_ABS_X_OST,
+	CY_ABS_Y_OST,
+	CY_ABS_P_OST,
+	CY_ABS_W_OST,
+	CY_ABS_ID_OST,
+	CY_ABS_MAJ_OST,
+	CY_ABS_MIN_OST,
+	CY_ABS_OR_OST,
+	CY_NUM_ABS_OST	/* number of abs signals */
+};
+
+enum cyttsp4_flags {
+	CY_FLAG_NONE = 0x00,
+	CY_FLAG_HOVER = 0x04,
+	CY_FLAG_FLIP = 0x08,
+	CY_FLAG_INV_X = 0x10,
+	CY_FLAG_INV_Y = 0x20,
+	CY_FLAG_VKEYS = 0x40,
+};
+
+enum cyttsp4_object_id {
+	CY_OBJ_STANDARD_FINGER,
+	CY_OBJ_LARGE_OBJECT,
+	CY_OBJ_STYLUS,
+	CY_OBJ_HOVER,
+};
+
+enum cyttsp4_event_id {
+	CY_EV_NO_EVENT,
+	CY_EV_TOUCHDOWN,
+	CY_EV_MOVE,		/* significant displacement (> act dist) */
+	CY_EV_LIFTOFF,		/* record reports last position */
+};
+
+/* x-axis resolution of panel in pixels */
+#define CY_PCFG_RESOLUTION_X_MASK	0x7F
+
+/* y-axis resolution of panel in pixels */
+#define CY_PCFG_RESOLUTION_Y_MASK	0x7F
+
+/* x-axis, 0:origin is on left side of panel, 1: right */
+#define CY_PCFG_ORIGIN_X_MASK		0x80
+
+/* y-axis, 0:origin is on top side of panel, 1: bottom */
+#define CY_PCFG_ORIGIN_Y_MASK		0x80
+
+static inline int cyttsp4_adap_read(struct cyttsp4 *ts, u16 addr, int size,
+		void *buf)
+{
+	return ts->bus_ops->read(ts->dev, ts->xfer_buf, addr, size, buf);
+}
+
+static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u16 addr, int size,
+		const void *buf)
+{
+	return ts->bus_ops->write(ts->dev, ts->xfer_buf, addr, size, buf);
+}
+
+extern struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
+		struct device *dev, u16 irq, size_t xfer_buf_size);
+extern int cyttsp4_remove(struct cyttsp4 *ts);
+int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
+		u8 length, const void *values);
+int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
+		u8 length, void *values);
+extern const struct dev_pm_ops cyttsp4_pm_ops;
+
+#endif /* _LINUX_CYTTSP4_CORE_H */
diff --git a/drivers/input/touchscreen/cyttsp4_i2c.c b/drivers/input/touchscreen/cyttsp4_i2c.c
new file mode 100644
index 000000000000..da32c151def5
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp4_i2c.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cyttsp_i2c.c
+ * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
+ * For use with Cypress  Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ * Copyright (C) 2013 Cypress Semiconductor
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#include "cyttsp4_core.h"
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+
+#define CYTTSP4_I2C_DATA_SIZE	(3 * 256)
+
+static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
+	.bustype	= BUS_I2C,
+	.write		= cyttsp_i2c_write_block_data,
+	.read           = cyttsp_i2c_read_block_data,
+};
+
+static int cyttsp4_i2c_probe(struct i2c_client *client)
+{
+	struct cyttsp4 *ts;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(&client->dev, "I2C functionality not Supported\n");
+		return -EIO;
+	}
+
+	ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
+			  CYTTSP4_I2C_DATA_SIZE);
+
+	return PTR_ERR_OR_ZERO(ts);
+}
+
+static void cyttsp4_i2c_remove(struct i2c_client *client)
+{
+	struct cyttsp4 *ts = i2c_get_clientdata(client);
+
+	cyttsp4_remove(ts);
+}
+
+static const struct i2c_device_id cyttsp4_i2c_id[] = {
+	{ CYTTSP4_I2C_NAME },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
+
+static struct i2c_driver cyttsp4_i2c_driver = {
+	.driver = {
+		.name	= CYTTSP4_I2C_NAME,
+		.pm	= pm_ptr(&cyttsp4_pm_ops),
+	},
+	.probe		= cyttsp4_i2c_probe,
+	.remove		= cyttsp4_i2c_remove,
+	.id_table	= cyttsp4_i2c_id,
+};
+
+module_i2c_driver(cyttsp4_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
+MODULE_AUTHOR("Cypress");
diff --git a/drivers/input/touchscreen/cyttsp4_spi.c b/drivers/input/touchscreen/cyttsp4_spi.c
new file mode 100644
index 000000000000..944fbbe9113e
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp4_spi.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Source for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) SPI touchscreen driver.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ * Copyright (C) 2013 Cypress Semiconductor
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#include "cyttsp4_core.h"
+
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/spi/spi.h>
+
+#define CY_SPI_WR_OP		0x00 /* r/~w */
+#define CY_SPI_RD_OP		0x01
+#define CY_SPI_BITS_PER_WORD	8
+#define CY_SPI_A8_BIT		0x02
+#define CY_SPI_WR_HEADER_BYTES	2
+#define CY_SPI_RD_HEADER_BYTES	1
+#define CY_SPI_CMD_BYTES	2
+#define CY_SPI_SYNC_BYTE	0
+#define CY_SPI_SYNC_ACK		0x62 /* from TRM *A protocol */
+#define CY_SPI_DATA_SIZE	(2 * 256)
+
+#define CY_SPI_DATA_BUF_SIZE	(CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE)
+
+static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
+			   u8 op, u16 reg, u8 *buf, int length)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	struct spi_message msg;
+	struct spi_transfer xfer[2];
+	u8 *wr_buf = &xfer_buf[0];
+	u8 rd_buf[CY_SPI_CMD_BYTES];
+	int retval;
+	int i;
+
+	if (length > CY_SPI_DATA_SIZE) {
+		dev_err(dev, "%s: length %d is too big.\n",
+			__func__, length);
+		return -EINVAL;
+	}
+
+	memset(wr_buf, 0, CY_SPI_DATA_BUF_SIZE);
+	memset(rd_buf, 0, CY_SPI_CMD_BYTES);
+
+	wr_buf[0] = op + (((reg >> 8) & 0x1) ? CY_SPI_A8_BIT : 0);
+	if (op == CY_SPI_WR_OP) {
+		wr_buf[1] = reg & 0xFF;
+		if (length > 0)
+			memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length);
+	}
+
+	memset(xfer, 0, sizeof(xfer));
+	spi_message_init(&msg);
+
+	/*
+	  We set both TX and RX buffers because Cypress TTSP
+	  requires full duplex operation.
+	*/
+	xfer[0].tx_buf = wr_buf;
+	xfer[0].rx_buf = rd_buf;
+	switch (op) {
+	case CY_SPI_WR_OP:
+		xfer[0].len = length + CY_SPI_CMD_BYTES;
+		spi_message_add_tail(&xfer[0], &msg);
+		break;
+
+	case CY_SPI_RD_OP:
+		xfer[0].len = CY_SPI_RD_HEADER_BYTES;
+		spi_message_add_tail(&xfer[0], &msg);
+
+		xfer[1].rx_buf = buf;
+		xfer[1].len = length;
+		spi_message_add_tail(&xfer[1], &msg);
+		break;
+
+	default:
+		dev_err(dev, "%s: bad operation code=%d\n", __func__, op);
+		return -EINVAL;
+	}
+
+	retval = spi_sync(spi, &msg);
+	if (retval < 0) {
+		dev_dbg(dev, "%s: spi_sync() error %d, len=%d, op=%d\n",
+			__func__, retval, xfer[1].len, op);
+
+		/*
+		 * do not return here since was a bad ACK sequence
+		 * let the following ACK check handle any errors and
+		 * allow silent retries
+		 */
+	}
+
+	if (rd_buf[CY_SPI_SYNC_BYTE] != CY_SPI_SYNC_ACK) {
+		dev_dbg(dev, "%s: operation %d failed\n", __func__, op);
+
+		for (i = 0; i < CY_SPI_CMD_BYTES; i++)
+			dev_dbg(dev, "%s: test rd_buf[%d]:0x%02x\n",
+				__func__, i, rd_buf[i]);
+		for (i = 0; i < length; i++)
+			dev_dbg(dev, "%s: test buf[%d]:0x%02x\n",
+				__func__, i, buf[i]);
+
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf,
+				      u16 addr, u8 length, void *data)
+{
+	int rc;
+
+	rc = cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, NULL, 0);
+	if (rc)
+		return rc;
+	else
+		return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_RD_OP, addr, data,
+				length);
+}
+
+static int cyttsp_spi_write_block_data(struct device *dev, u8 *xfer_buf,
+				       u16 addr, u8 length, const void *data)
+{
+	return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, (void *)data,
+			length);
+}
+
+static const struct cyttsp4_bus_ops cyttsp_spi_bus_ops = {
+	.bustype	= BUS_SPI,
+	.write		= cyttsp_spi_write_block_data,
+	.read		= cyttsp_spi_read_block_data,
+};
+
+static int cyttsp4_spi_probe(struct spi_device *spi)
+{
+	struct cyttsp4 *ts;
+	int error;
+
+	/* Set up SPI*/
+	spi->bits_per_word = CY_SPI_BITS_PER_WORD;
+	spi->mode = SPI_MODE_0;
+	error = spi_setup(spi);
+	if (error < 0) {
+		dev_err(&spi->dev, "%s: SPI setup error %d\n",
+			__func__, error);
+		return error;
+	}
+
+	ts = cyttsp4_probe(&cyttsp_spi_bus_ops, &spi->dev, spi->irq,
+			  CY_SPI_DATA_BUF_SIZE);
+
+	return PTR_ERR_OR_ZERO(ts);
+}
+
+static void cyttsp4_spi_remove(struct spi_device *spi)
+{
+	struct cyttsp4 *ts = spi_get_drvdata(spi);
+	cyttsp4_remove(ts);
+}
+
+static struct spi_driver cyttsp4_spi_driver = {
+	.driver = {
+		.name	= CYTTSP4_SPI_NAME,
+		.pm	= pm_ptr(&cyttsp4_pm_ops),
+	},
+	.probe  = cyttsp4_spi_probe,
+	.remove = cyttsp4_spi_remove,
+};
+
+module_spi_driver(cyttsp4_spi_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) SPI driver");
+MODULE_AUTHOR("Cypress");
+MODULE_ALIAS("spi:cyttsp4");
diff --git a/drivers/input/touchscreen/cyttsp_core.h b/drivers/input/touchscreen/cyttsp_core.h
index 40a605d20285..cd3b80401970 100644
--- a/drivers/input/touchscreen/cyttsp_core.h
+++ b/drivers/input/touchscreen/cyttsp_core.h
@@ -136,6 +136,10 @@ struct cyttsp {
 struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 			    struct device *dev, int irq, size_t xfer_buf_size);
 
+int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
+		u8 length, const void *values);
+int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
+		u8 length, void *values);
 extern const struct dev_pm_ops cyttsp_pm_ops;
 
 #endif /* __CYTTSP_CORE_H__ */
diff --git a/drivers/input/touchscreen/cyttsp_i2c.c b/drivers/input/touchscreen/cyttsp_i2c.c
index cb15600549cd..bf13b3448a6b 100644
--- a/drivers/input/touchscreen/cyttsp_i2c.c
+++ b/drivers/input/touchscreen/cyttsp_i2c.c
@@ -22,61 +22,6 @@
 
 #define CY_I2C_DATA_SIZE	128
 
-static int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
-				      u16 addr, u8 length, void *values)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	u8 client_addr = client->addr | ((addr >> 8) & 0x1);
-	u8 addr_lo = addr & 0xFF;
-	struct i2c_msg msgs[] = {
-		{
-			.addr = client_addr,
-			.flags = 0,
-			.len = 1,
-			.buf = &addr_lo,
-		},
-		{
-			.addr = client_addr,
-			.flags = I2C_M_RD,
-			.len = length,
-			.buf = values,
-		},
-	};
-	int retval;
-
-	retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
-	if (retval < 0)
-		return retval;
-
-	return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
-}
-
-static int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
-				       u16 addr, u8 length, const void *values)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	u8 client_addr = client->addr | ((addr >> 8) & 0x1);
-	u8 addr_lo = addr & 0xFF;
-	struct i2c_msg msgs[] = {
-		{
-			.addr = client_addr,
-			.flags = 0,
-			.len = length + 1,
-			.buf = xfer_buf,
-		},
-	};
-	int retval;
-
-	xfer_buf[0] = addr_lo;
-	memcpy(&xfer_buf[1], values, length);
-
-	retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
-	if (retval < 0)
-		return retval;
-
-	return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
-}
-
 static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
 	.bustype	= BUS_I2C,
 	.write		= cyttsp_i2c_write_block_data,
diff --git a/drivers/input/touchscreen/cyttsp_i2c_common.c b/drivers/input/touchscreen/cyttsp_i2c_common.c
new file mode 100644
index 000000000000..7e752fb9fad7
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp_i2c_common.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cyttsp_i2c_common.c
+ * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
+ * For use with Cypress Txx3xx and Txx4xx parts.
+ * Supported parts include:
+ * CY8CTST341
+ * CY8CTMA340
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include "cyttsp4_core.h"
+
+int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
+				      u16 addr, u8 length, void *values)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 client_addr = client->addr | ((addr >> 8) & 0x1);
+	u8 addr_lo = addr & 0xFF;
+	struct i2c_msg msgs[] = {
+		{
+			.addr = client_addr,
+			.flags = 0,
+			.len = 1,
+			.buf = &addr_lo,
+		},
+		{
+			.addr = client_addr,
+			.flags = I2C_M_RD,
+			.len = length,
+			.buf = values,
+		},
+	};
+	int retval;
+
+	retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (retval < 0)
+		return retval;
+
+	return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
+}
+EXPORT_SYMBOL_GPL(cyttsp_i2c_read_block_data);
+
+int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
+				       u16 addr, u8 length, const void *values)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 client_addr = client->addr | ((addr >> 8) & 0x1);
+	u8 addr_lo = addr & 0xFF;
+	struct i2c_msg msgs[] = {
+		{
+			.addr = client_addr,
+			.flags = 0,
+			.len = length + 1,
+			.buf = xfer_buf,
+		},
+	};
+	int retval;
+
+	xfer_buf[0] = addr_lo;
+	memcpy(&xfer_buf[1], values, length);
+
+	retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (retval < 0)
+		return retval;
+
+	return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
+}
+EXPORT_SYMBOL_GPL(cyttsp_i2c_write_block_data);
+
+
+MODULE_DESCRIPTION("Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cypress");
diff --git a/include/linux/platform_data/cyttsp4.h b/include/linux/platform_data/cyttsp4.h
new file mode 100644
index 000000000000..5dc9d2be384b
--- /dev/null
+++ b/include/linux/platform_data/cyttsp4.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Header file for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
+ * For use with Cypress Txx3xx parts.
+ * Supported parts include:
+ * CY8CTST341
+ * CY8CTMA340
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ *
+ * Contact Cypress Semiconductor at www.cypress.com (kev@cypress.com)
+ */
+#ifndef _CYTTSP4_H_
+#define _CYTTSP4_H_
+
+#define CYTTSP4_MT_NAME "cyttsp4_mt"
+#define CYTTSP4_I2C_NAME "cyttsp4_i2c_adapter"
+#define CYTTSP4_SPI_NAME "cyttsp4_spi_adapter"
+
+#define CY_TOUCH_SETTINGS_MAX 32
+
+struct touch_framework {
+	const uint16_t  *abs;
+	uint8_t         size;
+	uint8_t         enable_vkeys;
+} __packed;
+
+struct cyttsp4_mt_platform_data {
+	struct touch_framework *frmwrk;
+	unsigned short flags;
+	char const *inp_dev_name;
+};
+
+struct touch_settings {
+	const uint8_t *data;
+	uint32_t size;
+	uint8_t tag;
+} __packed;
+
+struct cyttsp4_core_platform_data {
+	int irq_gpio;
+	int rst_gpio;
+	int level_irq_udelay;
+	int (*xres)(struct cyttsp4_core_platform_data *pdata,
+		struct device *dev);
+	int (*init)(struct cyttsp4_core_platform_data *pdata,
+		int on, struct device *dev);
+	int (*power)(struct cyttsp4_core_platform_data *pdata,
+		int on, struct device *dev, atomic_t *ignore_irq);
+	int (*irq_stat)(struct cyttsp4_core_platform_data *pdata,
+		struct device *dev);
+	struct touch_settings *sett[CY_TOUCH_SETTINGS_MAX];
+};
+
+struct cyttsp4_platform_data {
+	struct cyttsp4_core_platform_data *core_pdata;
+	struct cyttsp4_mt_platform_data *mt_pdata;
+};
+
+#endif /* _CYTTSP4_H_ */
-- 
2.35.3

