[PATCH 1/2] Input: msc5000_ts - remove the driver

From: Dmitry Torokhov
Date: Sun Jul 14 2024 - 02:00:52 EST

MCS-5000 belongs to the 1st generation of Melfas chips, manufactured in
2000-2007.

The driver relies on custom platform data (no DT support) and there
never were any users of this driver in the mainline kernel. The commit
adding the driver mentioned that the driver was tested on S3C6410 NCP
board (with Samsung S3C6410 SoC) but the touchscreen device was never
added to the board file. This board was removed in v6.3 in commit
743c8fbb90ca ("ARM: s3c: remove most s3c64xx board support").

Remove the driver since there are no users.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/input/touchscreen/Kconfig | 12 --
drivers/input/touchscreen/Makefile | 1 -
drivers/input/touchscreen/mcs5000_ts.c | 288 -------------------------
include/linux/platform_data/mcs.h | 4 -
4 files changed, 305 deletions(-)
delete mode 100644 drivers/input/touchscreen/mcs5000_ts.c

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index c821fe3ee794..0df90c3d743b 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -626,18 +626,6 @@ config TOUCHSCREEN_MAX11801
To compile this driver as a module, choose M here: the
module will be called max11801_ts.

-config TOUCHSCREEN_MCS5000
- tristate "MELFAS MCS-5000 touchscreen"
- depends on I2C
- help
- Say Y here if you have the MELFAS MCS-5000 touchscreen controller
- chip in your system.
-
- If unsure, say N.
-
- To compile this driver as a module, choose M here: the
- module will be called mcs5000_ts.
-
config TOUCHSCREEN_MMS114
tristate "MELFAS MMS114 touchscreen"
depends on I2C
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index a81cb5aa21a5..04dc8039341b 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -63,7 +63,6 @@ obj-$(CONFIG_TOUCHSCREEN_MAX11801) += max11801_ts.o
obj-$(CONFIG_TOUCHSCREEN_MXS_LRADC) += mxs-lradc-ts.o
obj-$(CONFIG_TOUCHSCREEN_MX25) += fsl-imx25-tcq.o
obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o
-obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o
obj-$(CONFIG_TOUCHSCREEN_MELFAS_MIP4) += melfas_mip4.o
obj-$(CONFIG_TOUCHSCREEN_MIGOR) += migor_ts.o
obj-$(CONFIG_TOUCHSCREEN_MMS114) += mms114.o
diff --git a/drivers/input/touchscreen/mcs5000_ts.c b/drivers/input/touchscreen/mcs5000_ts.c
deleted file mode 100644
index 5aff8dcda0dc..000000000000
--- a/drivers/input/touchscreen/mcs5000_ts.c
+++ /dev/null
@@ -1,288 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * mcs5000_ts.c - Touchscreen driver for MELFAS MCS-5000 controller
- *
- * Copyright (C) 2009 Samsung Electronics Co.Ltd
- * Author: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
- *
- * Based on wm97xx-core.c
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/irq.h>
-#include <linux/platform_data/mcs.h>
-#include <linux/slab.h>
-
-/* Registers */
-#define MCS5000_TS_STATUS 0x00
-#define STATUS_OFFSET 0
-#define STATUS_NO (0 << STATUS_OFFSET)
-#define STATUS_INIT (1 << STATUS_OFFSET)
-#define STATUS_SENSING (2 << STATUS_OFFSET)
-#define STATUS_COORD (3 << STATUS_OFFSET)
-#define STATUS_GESTURE (4 << STATUS_OFFSET)
-#define ERROR_OFFSET 4
-#define ERROR_NO (0 << ERROR_OFFSET)
-#define ERROR_POWER_ON_RESET (1 << ERROR_OFFSET)
-#define ERROR_INT_RESET (2 << ERROR_OFFSET)
-#define ERROR_EXT_RESET (3 << ERROR_OFFSET)
-#define ERROR_INVALID_REG_ADDRESS (8 << ERROR_OFFSET)
-#define ERROR_INVALID_REG_VALUE (9 << ERROR_OFFSET)
-
-#define MCS5000_TS_OP_MODE 0x01
-#define RESET_OFFSET 0
-#define RESET_NO (0 << RESET_OFFSET)
-#define RESET_EXT_SOFT (1 << RESET_OFFSET)
-#define OP_MODE_OFFSET 1
-#define OP_MODE_SLEEP (0 << OP_MODE_OFFSET)
-#define OP_MODE_ACTIVE (1 << OP_MODE_OFFSET)
-#define GESTURE_OFFSET 4
-#define GESTURE_DISABLE (0 << GESTURE_OFFSET)
-#define GESTURE_ENABLE (1 << GESTURE_OFFSET)
-#define PROXIMITY_OFFSET 5
-#define PROXIMITY_DISABLE (0 << PROXIMITY_OFFSET)
-#define PROXIMITY_ENABLE (1 << PROXIMITY_OFFSET)
-#define SCAN_MODE_OFFSET 6
-#define SCAN_MODE_INTERRUPT (0 << SCAN_MODE_OFFSET)
-#define SCAN_MODE_POLLING (1 << SCAN_MODE_OFFSET)
-#define REPORT_RATE_OFFSET 7
-#define REPORT_RATE_40 (0 << REPORT_RATE_OFFSET)
-#define REPORT_RATE_80 (1 << REPORT_RATE_OFFSET)
-
-#define MCS5000_TS_SENS_CTL 0x02
-#define MCS5000_TS_FILTER_CTL 0x03
-#define PRI_FILTER_OFFSET 0
-#define SEC_FILTER_OFFSET 4
-
-#define MCS5000_TS_X_SIZE_UPPER 0x08
-#define MCS5000_TS_X_SIZE_LOWER 0x09
-#define MCS5000_TS_Y_SIZE_UPPER 0x0A
-#define MCS5000_TS_Y_SIZE_LOWER 0x0B
-
-#define MCS5000_TS_INPUT_INFO 0x10
-#define INPUT_TYPE_OFFSET 0
-#define INPUT_TYPE_NONTOUCH (0 << INPUT_TYPE_OFFSET)
-#define INPUT_TYPE_SINGLE (1 << INPUT_TYPE_OFFSET)
-#define INPUT_TYPE_DUAL (2 << INPUT_TYPE_OFFSET)
-#define INPUT_TYPE_PALM (3 << INPUT_TYPE_OFFSET)
-#define INPUT_TYPE_PROXIMITY (7 << INPUT_TYPE_OFFSET)
-#define GESTURE_CODE_OFFSET 3
-#define GESTURE_CODE_NO (0 << GESTURE_CODE_OFFSET)
-
-#define MCS5000_TS_X_POS_UPPER 0x11
-#define MCS5000_TS_X_POS_LOWER 0x12
-#define MCS5000_TS_Y_POS_UPPER 0x13
-#define MCS5000_TS_Y_POS_LOWER 0x14
-#define MCS5000_TS_Z_POS 0x15
-#define MCS5000_TS_WIDTH 0x16
-#define MCS5000_TS_GESTURE_VAL 0x17
-#define MCS5000_TS_MODULE_REV 0x20
-#define MCS5000_TS_FIRMWARE_VER 0x21
-
-/* Touchscreen absolute values */
-#define MCS5000_MAX_XC 0x3ff
-#define MCS5000_MAX_YC 0x3ff
-
-enum mcs5000_ts_read_offset {
- READ_INPUT_INFO,
- READ_X_POS_UPPER,
- READ_X_POS_LOWER,
- READ_Y_POS_UPPER,
- READ_Y_POS_LOWER,
- READ_BLOCK_SIZE,
-};
-
-/* Each client has this additional data */
-struct mcs5000_ts_data {
- struct i2c_client *client;
- struct input_dev *input_dev;
- const struct mcs_platform_data *platform_data;
-};
-
-static irqreturn_t mcs5000_ts_interrupt(int irq, void *dev_id)
-{
- struct mcs5000_ts_data *data = dev_id;
- struct i2c_client *client = data->client;
- u8 buffer[READ_BLOCK_SIZE];
- int err;
- int x;
- int y;
-
- err = i2c_smbus_read_i2c_block_data(client, MCS5000_TS_INPUT_INFO,
- READ_BLOCK_SIZE, buffer);
- if (err < 0) {
- dev_err(&client->dev, "%s, err[%d]\n", __func__, err);
- goto out;
- }
-
- switch (buffer[READ_INPUT_INFO]) {
- case INPUT_TYPE_NONTOUCH:
- input_report_key(data->input_dev, BTN_TOUCH, 0);
- input_sync(data->input_dev);
- break;
-
- case INPUT_TYPE_SINGLE:
- x = (buffer[READ_X_POS_UPPER] << 8) | buffer[READ_X_POS_LOWER];
- y = (buffer[READ_Y_POS_UPPER] << 8) | buffer[READ_Y_POS_LOWER];
-
- input_report_key(data->input_dev, BTN_TOUCH, 1);
- input_report_abs(data->input_dev, ABS_X, x);
- input_report_abs(data->input_dev, ABS_Y, y);
- input_sync(data->input_dev);
- break;
-
- case INPUT_TYPE_DUAL:
- /* TODO */
- break;
-
- case INPUT_TYPE_PALM:
- /* TODO */
- break;
-
- case INPUT_TYPE_PROXIMITY:
- /* TODO */
- break;
-
- default:
- dev_err(&client->dev, "Unknown ts input type %d\n",
- buffer[READ_INPUT_INFO]);
- break;
- }
-
- out:
- return IRQ_HANDLED;
-}
-
-static void mcs5000_ts_phys_init(struct mcs5000_ts_data *data,
- const struct mcs_platform_data *platform_data)
-{
- struct i2c_client *client = data->client;
-
- /* Touch reset & sleep mode */
- i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE,
- RESET_EXT_SOFT | OP_MODE_SLEEP);
-
- /* Touch size */
- i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_UPPER,
- platform_data->x_size >> 8);
- i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_LOWER,
- platform_data->x_size & 0xff);
- i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_UPPER,
- platform_data->y_size >> 8);
- i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_LOWER,
- platform_data->y_size & 0xff);
-
- /* Touch active mode & 80 report rate */
- i2c_smbus_write_byte_data(data->client, MCS5000_TS_OP_MODE,
- OP_MODE_ACTIVE | REPORT_RATE_80);
-}
-
-static int mcs5000_ts_probe(struct i2c_client *client)
-{
- const struct mcs_platform_data *pdata;
- struct mcs5000_ts_data *data;
- struct input_dev *input_dev;
- int error;
-
- pdata = dev_get_platdata(&client->dev);
- if (!pdata)
- return -EINVAL;
-
- data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
- if (!data) {
- dev_err(&client->dev, "Failed to allocate memory\n");
- return -ENOMEM;
- }
-
- data->client = client;
-
- input_dev = devm_input_allocate_device(&client->dev);
- if (!input_dev) {
- dev_err(&client->dev, "Failed to allocate input device\n");
- return -ENOMEM;
- }
-
- input_dev->name = "MELFAS MCS-5000 Touchscreen";
- input_dev->id.bustype = BUS_I2C;
- input_dev->dev.parent = &client->dev;
-
- __set_bit(EV_ABS, input_dev->evbit);
- __set_bit(EV_KEY, input_dev->evbit);
- __set_bit(BTN_TOUCH, input_dev->keybit);
- input_set_abs_params(input_dev, ABS_X, 0, MCS5000_MAX_XC, 0, 0);
- input_set_abs_params(input_dev, ABS_Y, 0, MCS5000_MAX_YC, 0, 0);
-
- data->input_dev = input_dev;
-
- if (pdata->cfg_pin)
- pdata->cfg_pin();
-
- error = devm_request_threaded_irq(&client->dev, client->irq,
- NULL, mcs5000_ts_interrupt,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
- "mcs5000_ts", data);
- if (error) {
- dev_err(&client->dev, "Failed to register interrupt\n");
- return error;
- }
-
- error = input_register_device(data->input_dev);
- if (error) {
- dev_err(&client->dev, "Failed to register input device\n");
- return error;
- }
-
- mcs5000_ts_phys_init(data, pdata);
- i2c_set_clientdata(client, data);
-
- return 0;
-}
-
-static int mcs5000_ts_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
-
- /* Touch sleep mode */
- i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, OP_MODE_SLEEP);
-
- return 0;
-}
-
-static int mcs5000_ts_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct mcs5000_ts_data *data = i2c_get_clientdata(client);
- const struct mcs_platform_data *pdata = dev_get_platdata(dev);
-
- mcs5000_ts_phys_init(data, pdata);
-
- return 0;
-}
-
-static DEFINE_SIMPLE_DEV_PM_OPS(mcs5000_ts_pm,
- mcs5000_ts_suspend, mcs5000_ts_resume);
-
-static const struct i2c_device_id mcs5000_ts_id[] = {
- { "mcs5000_ts" },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, mcs5000_ts_id);
-
-static struct i2c_driver mcs5000_ts_driver = {
- .probe = mcs5000_ts_probe,
- .driver = {
- .name = "mcs5000_ts",
- .pm = pm_sleep_ptr(&mcs5000_ts_pm),
- },
- .id_table = mcs5000_ts_id,
-};
-
-module_i2c_driver(mcs5000_ts_driver);
-
-/* Module information */
-MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>");
-MODULE_DESCRIPTION("Touchscreen driver for MELFAS MCS-5000 controller");
-MODULE_LICENSE("GPL");
diff --git a/include/linux/platform_data/mcs.h b/include/linux/platform_data/mcs.h
index fcc6f2a1f5c3..f3b0749f1630 100644
--- a/include/linux/platform_data/mcs.h
+++ b/include/linux/platform_data/mcs.h
@@ -16,10 +16,6 @@ struct mcs_platform_data {
void (*poweron)(bool);
void (*cfg_pin)(void);

- /* touchscreen */
- unsigned int x_size;
- unsigned int y_size;
-
/* touchkey */
const u32 *keymap;
unsigned int keymap_size;
--
2.45.2.993.g49e7a77208-goog