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From:   Dmitry Torokhov <dmitry.torokhov@gmail.com>
To:     Heiko Stuebner <heiko@sntech.de>
Cc:     Linus Walleij <linus.walleij@linaro.org>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/5] Input: auo-pixcir-ts - drop support for platform data
Date:   Wed, 14 Sep 2022 07:14:24 -0700
Message-Id: <20220914141428.2201784-1-dmitry.torokhov@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Currently there are no users of auo_pixcir_ts_platdata in the mainline, and
having it (with legacy gpio numbers) prevents us from converting the driver
to gpiod API, so let's drop it.

If, in the future, someone wants to use this driver on non-device tree,
non-ACPI system, they should use static device properties instead of
platform data.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/auo-pixcir-ts.c | 118 ++++++++++------------
 include/linux/input/auo-pixcir-ts.h       |  44 --------
 2 files changed, 56 insertions(+), 106 deletions(-)
 delete mode 100644 include/linux/input/auo-pixcir-ts.h

diff --git a/drivers/input/touchscreen/auo-pixcir-ts.c b/drivers/input/touchscreen/auo-pixcir-ts.c
index c33e63ca6142..a51d66ebff2b 100644
--- a/drivers/input/touchscreen/auo-pixcir-ts.c
+++ b/drivers/input/touchscreen/auo-pixcir-ts.c
@@ -20,7 +20,6 @@
 #include <linux/mutex.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
-#include <linux/input/auo-pixcir-ts.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 
@@ -69,6 +68,16 @@
 #define AUO_PIXCIR_INT_RELEASE		(1 << 4)
 #define AUO_PIXCIR_INT_ENABLE		(1 << 3)
 #define AUO_PIXCIR_INT_POL_HIGH		(1 << 2)
+
+/*
+ * Interrupt modes:
+ * periodical:		interrupt is asserted periodicaly
+ * compare coordinates:	interrupt is asserted when coordinates change
+ * indicate touch:	interrupt is asserted during touch
+ */
+#define AUO_PIXCIR_INT_PERIODICAL	0x00
+#define AUO_PIXCIR_INT_COMP_COORD	0x01
+#define AUO_PIXCIR_INT_TOUCH_IND	0x02
 #define AUO_PIXCIR_INT_MODE_MASK	0x03
 
 /*
@@ -103,10 +112,14 @@
 struct auo_pixcir_ts {
 	struct i2c_client	*client;
 	struct input_dev	*input;
-	const struct auo_pixcir_ts_platdata *pdata;
+	int			gpio_int;
+	int			gpio_rst;
 	char			phys[32];
 
-	/* special handling for touch_indicate interupt mode */
+	unsigned int		x_max;
+	unsigned int		y_max;
+
+	/* special handling for touch_indicate interrupt mode */
 	bool			touch_ind_mode;
 
 	wait_queue_head_t	wait;
@@ -125,7 +138,6 @@ static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts,
 				   struct auo_point_t *point)
 {
 	struct i2c_client *client = ts->client;
-	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
 	uint8_t raw_coord[8];
 	uint8_t raw_area[4];
 	int i, ret;
@@ -152,8 +164,8 @@ static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts,
 		point[i].coord_y =
 			raw_coord[4 * i + 3] << 8 | raw_coord[4 * i + 2];
 
-		if (point[i].coord_x > pdata->x_max ||
-		    point[i].coord_y > pdata->y_max) {
+		if (point[i].coord_x > ts->x_max ||
+		    point[i].coord_y > ts->y_max) {
 			dev_warn(&client->dev, "coordinates (%d,%d) invalid\n",
 				point[i].coord_x, point[i].coord_y);
 			point[i].coord_x = point[i].coord_y = 0;
@@ -171,7 +183,6 @@ static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts,
 static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id)
 {
 	struct auo_pixcir_ts *ts = dev_id;
-	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
 	struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS];
 	int i;
 	int ret;
@@ -182,7 +193,7 @@ static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id)
 
 		/* check for up event in touch touch_ind_mode */
 		if (ts->touch_ind_mode) {
-			if (gpio_get_value(pdata->gpio_int) == 0) {
+			if (gpio_get_value(ts->gpio_int) == 0) {
 				input_mt_sync(ts->input);
 				input_report_key(ts->input, BTN_TOUCH, 0);
 				input_sync(ts->input);
@@ -278,11 +289,9 @@ static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode)
 	return 0;
 }
 
-static int auo_pixcir_int_config(struct auo_pixcir_ts *ts,
-					   int int_setting)
+static int auo_pixcir_int_config(struct auo_pixcir_ts *ts, int int_setting)
 {
 	struct i2c_client *client = ts->client;
-	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
 	int ret;
 
 	ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING);
@@ -304,7 +313,7 @@ static int auo_pixcir_int_config(struct auo_pixcir_ts *ts,
 		return ret;
 	}
 
-	ts->touch_ind_mode = pdata->int_setting == AUO_PIXCIR_INT_TOUCH_IND;
+	ts->touch_ind_mode = int_setting == AUO_PIXCIR_INT_TOUCH_IND;
 
 	return 0;
 }
@@ -466,49 +475,41 @@ static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops,
 			 auo_pixcir_suspend, auo_pixcir_resume);
 
 #ifdef CONFIG_OF
-static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
+static int auo_pixcir_parse_dt(struct device *dev, struct auo_pixcir_ts *ts)
 {
-	struct auo_pixcir_ts_platdata *pdata;
 	struct device_node *np = dev->of_node;
 
 	if (!np)
-		return ERR_PTR(-ENOENT);
+		return -ENOENT;
 
-	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata)
-		return ERR_PTR(-ENOMEM);
-
-	pdata->gpio_int = of_get_gpio(np, 0);
-	if (!gpio_is_valid(pdata->gpio_int)) {
+	ts->gpio_int = of_get_gpio(np, 0);
+	if (!gpio_is_valid(ts->gpio_int)) {
 		dev_err(dev, "failed to get interrupt gpio\n");
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 	}
 
-	pdata->gpio_rst = of_get_gpio(np, 1);
-	if (!gpio_is_valid(pdata->gpio_rst)) {
+	ts->gpio_rst = of_get_gpio(np, 1);
+	if (!gpio_is_valid(ts->gpio_rst)) {
 		dev_err(dev, "failed to get reset gpio\n");
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 	}
 
-	if (of_property_read_u32(np, "x-size", &pdata->x_max)) {
+	if (of_property_read_u32(np, "x-size", &ts->x_max)) {
 		dev_err(dev, "failed to get x-size property\n");
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 	}
 
-	if (of_property_read_u32(np, "y-size", &pdata->y_max)) {
+	if (of_property_read_u32(np, "y-size", &ts->y_max)) {
 		dev_err(dev, "failed to get y-size property\n");
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 	}
 
-	/* default to asserting the interrupt when the screen is touched */
-	pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND;
-
-	return pdata;
+	return 0;
 }
 #else
-static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
+static int auo_pixcir_parse_dt(struct device *dev, struct auo_pixcir_ts *ts)
 {
-	return ERR_PTR(-EINVAL);
+	return -EINVAL;
 }
 #endif
 
@@ -516,27 +517,18 @@ static void auo_pixcir_reset(void *data)
 {
 	struct auo_pixcir_ts *ts = data;
 
-	gpio_set_value(ts->pdata->gpio_rst, 0);
+	gpio_set_value(ts->gpio_rst, 0);
 }
 
 static int auo_pixcir_probe(struct i2c_client *client,
 			    const struct i2c_device_id *id)
 {
-	const struct auo_pixcir_ts_platdata *pdata;
 	struct auo_pixcir_ts *ts;
 	struct input_dev *input_dev;
 	int version;
 	int error;
 
-	pdata = dev_get_platdata(&client->dev);
-	if (!pdata) {
-		pdata = auo_pixcir_parse_dt(&client->dev);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-	}
-
-	ts = devm_kzalloc(&client->dev,
-			  sizeof(struct auo_pixcir_ts), GFP_KERNEL);
+	ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
 	if (!ts)
 		return -ENOMEM;
 
@@ -546,7 +538,6 @@ static int auo_pixcir_probe(struct i2c_client *client,
 		return -ENOMEM;
 	}
 
-	ts->pdata = pdata;
 	ts->client = client;
 	ts->input = input_dev;
 	ts->touch_ind_mode = 0;
@@ -556,6 +547,10 @@ static int auo_pixcir_probe(struct i2c_client *client,
 	snprintf(ts->phys, sizeof(ts->phys),
 		 "%s/input0", dev_name(&client->dev));
 
+	error = auo_pixcir_parse_dt(&client->dev, ts);
+	if (error)
+		return error;
+
 	input_dev->name = "AUO-Pixcir touchscreen";
 	input_dev->phys = ts->phys;
 	input_dev->id.bustype = BUS_I2C;
@@ -569,36 +564,34 @@ static int auo_pixcir_probe(struct i2c_client *client,
 	__set_bit(BTN_TOUCH, input_dev->keybit);
 
 	/* For single touch */
-	input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0);
+	input_set_abs_params(input_dev, ABS_X, 0, ts->x_max, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0, ts->y_max, 0, 0);
 
 	/* For multi touch */
-	input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
-			     pdata->x_max, 0, 0);
-	input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
-			     pdata->y_max, 0, 0);
-	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0,
-			     AUO_PIXCIR_MAX_AREA, 0, 0);
-	input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0,
-			     AUO_PIXCIR_MAX_AREA, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, ts->x_max, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, ts->y_max, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+			     0, AUO_PIXCIR_MAX_AREA, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR,
+			     0, AUO_PIXCIR_MAX_AREA, 0, 0);
 	input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
 
 	input_set_drvdata(ts->input, ts);
 
-	error = devm_gpio_request_one(&client->dev, pdata->gpio_int,
+	error = devm_gpio_request_one(&client->dev, ts->gpio_int,
 				      GPIOF_DIR_IN, "auo_pixcir_ts_int");
 	if (error) {
 		dev_err(&client->dev, "request of gpio %d failed, %d\n",
-			pdata->gpio_int, error);
+			ts->gpio_int, error);
 		return error;
 	}
 
-	error = devm_gpio_request_one(&client->dev, pdata->gpio_rst,
+	error = devm_gpio_request_one(&client->dev, ts->gpio_rst,
 				      GPIOF_DIR_OUT | GPIOF_INIT_HIGH,
 				      "auo_pixcir_ts_rst");
 	if (error) {
 		dev_err(&client->dev, "request of gpio %d failed, %d\n",
-			pdata->gpio_rst, error);
+			ts->gpio_rst, error);
 		return error;
 	}
 
@@ -619,7 +612,8 @@ static int auo_pixcir_probe(struct i2c_client *client,
 
 	dev_info(&client->dev, "firmware version 0x%X\n", version);
 
-	error = auo_pixcir_int_config(ts, pdata->int_setting);
+	/* default to asserting the interrupt when the screen is touched */
+	error = auo_pixcir_int_config(ts, AUO_PIXCIR_INT_TOUCH_IND);
 	if (error)
 		return error;
 
diff --git a/include/linux/input/auo-pixcir-ts.h b/include/linux/input/auo-pixcir-ts.h
deleted file mode 100644
index ed0776997a7a..000000000000
--- a/include/linux/input/auo-pixcir-ts.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Driver for AUO in-cell touchscreens
- *
- * Copyright (c) 2011 Heiko Stuebner <heiko@sntech.de>
- *
- * based on auo_touch.h from Dell Streak kernel
- *
- * Copyright (c) 2008 QUALCOMM Incorporated.
- * Copyright (c) 2008 QUALCOMM USA, INC.
- */
-
-#ifndef __AUO_PIXCIR_TS_H__
-#define __AUO_PIXCIR_TS_H__
-
-/*
- * Interrupt modes:
- * periodical:		interrupt is asserted periodicaly
- * compare coordinates:	interrupt is asserted when coordinates change
- * indicate touch:	interrupt is asserted during touch
- */
-#define AUO_PIXCIR_INT_PERIODICAL	0x00
-#define AUO_PIXCIR_INT_COMP_COORD	0x01
-#define AUO_PIXCIR_INT_TOUCH_IND	0x02
-
-/*
- * @gpio_int		interrupt gpio
- * @int_setting		one of AUO_PIXCIR_INT_*
- * @init_hw		hardwarespecific init
- * @exit_hw		hardwarespecific shutdown
- * @x_max		x-resolution
- * @y_max		y-resolution
- */
-struct auo_pixcir_ts_platdata {
-	int gpio_int;
-	int gpio_rst;
-
-	int int_setting;
-
-	unsigned int x_max;
-	unsigned int y_max;
-};
-
-#endif
-- 
2.37.2.789.g6183377224-goog