Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Driver for ChipOne icn8318 i2c touchscreen controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2015 Red Hat Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Red Hat authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Hans de Goede <hdegoede@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/input/mt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/input/touchscreen.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define ICN8318_REG_POWER		4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define ICN8318_REG_TOUCHDATA		16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define ICN8318_POWER_ACTIVE		0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define ICN8318_POWER_MONITOR		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define ICN8318_POWER_HIBERNATE		2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define ICN8318_MAX_TOUCHES		5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) struct icn8318_touch {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	__u8 slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	__be16 x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	__be16 y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	__u8 pressure;	/* Seems more like finger width then pressure really */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	__u8 event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) /* The difference between 2 and 3 is unclear */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define ICN8318_EVENT_NO_DATA	1 /* No finger seen yet since wakeup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define ICN8318_EVENT_UPDATE1	2 /* New or updated coordinates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define ICN8318_EVENT_UPDATE2	3 /* New or updated coordinates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define ICN8318_EVENT_END	4 /* Finger lifted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) struct icn8318_touch_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	__u8 softbutton;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	__u8 touch_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct icn8318_touch touches[ICN8318_MAX_TOUCHES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) struct icn8318_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct gpio_desc *wake_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct touchscreen_properties prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) static int icn8318_read_touch_data(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 				   struct icn8318_touch_data *touch_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	u8 reg = ICN8318_REG_TOUCHDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	struct i2c_msg msg[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			.addr = client->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 			.len = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 			.buf = &reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			.addr = client->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			.flags = I2C_M_RD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			.len = sizeof(struct icn8318_touch_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			.buf = (u8 *)touch_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	return i2c_transfer(client->adapter, msg, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) static inline bool icn8318_touch_active(u8 event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return (event == ICN8318_EVENT_UPDATE1) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	       (event == ICN8318_EVENT_UPDATE2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static irqreturn_t icn8318_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	struct icn8318_data *data = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	struct device *dev = &data->client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct icn8318_touch_data touch_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	ret = icn8318_read_touch_data(data->client, &touch_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		dev_err(dev, "Error reading touch data: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	if (touch_data.softbutton) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		 * Other data is invalid when a softbutton is pressed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		 * This needs some extra devicetree bindings to map the icn8318
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		 * softbutton codes to evdev codes. Currently no known devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		 * use this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	if (touch_data.touch_count > ICN8318_MAX_TOUCHES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		dev_warn(dev, "Too much touches %d > %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			 touch_data.touch_count, ICN8318_MAX_TOUCHES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		touch_data.touch_count = ICN8318_MAX_TOUCHES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	for (i = 0; i < touch_data.touch_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		struct icn8318_touch *touch = &touch_data.touches[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		bool act = icn8318_touch_active(touch->event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		input_mt_slot(data->input, touch->slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		input_mt_report_slot_state(data->input, MT_TOOL_FINGER, act);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		if (!act)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		touchscreen_report_pos(data->input, &data->prop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 				       be16_to_cpu(touch->x),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 				       be16_to_cpu(touch->y), true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	input_mt_sync_frame(data->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	input_sync(data->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static int icn8318_start(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct icn8318_data *data = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	enable_irq(data->client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	gpiod_set_value_cansleep(data->wake_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static void icn8318_stop(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	struct icn8318_data *data = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	disable_irq(data->client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	i2c_smbus_write_byte_data(data->client, ICN8318_REG_POWER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 				  ICN8318_POWER_HIBERNATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	gpiod_set_value_cansleep(data->wake_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static int icn8318_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct icn8318_data *data = i2c_get_clientdata(to_i2c_client(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	mutex_lock(&data->input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	if (data->input->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		icn8318_stop(data->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	mutex_unlock(&data->input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int icn8318_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	struct icn8318_data *data = i2c_get_clientdata(to_i2c_client(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	mutex_lock(&data->input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (data->input->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		icn8318_start(data->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	mutex_unlock(&data->input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static SIMPLE_DEV_PM_OPS(icn8318_pm_ops, icn8318_suspend, icn8318_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int icn8318_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			 const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	struct icn8318_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (!client->irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		dev_err(dev, "Error no irq specified\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	data->wake_gpio = devm_gpiod_get(dev, "wake", GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (IS_ERR(data->wake_gpio)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		error = PTR_ERR(data->wake_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			dev_err(dev, "Error getting wake gpio: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	input = devm_input_allocate_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (!input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	input->name = client->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	input->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	input->open = icn8318_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	input->close = icn8318_stop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	input->dev.parent = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	touchscreen_parse_properties(input, true, &data->prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	    !input_abs_get_max(input, ABS_MT_POSITION_Y)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		dev_err(dev, "Error touchscreen-size-x and/or -y missing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	error = input_mt_init_slots(input, ICN8318_MAX_TOUCHES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	data->input = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	input_set_drvdata(input, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	error = devm_request_threaded_irq(dev, client->irq, NULL, icn8318_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 					  IRQF_ONESHOT, client->name, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		dev_err(dev, "Error requesting irq: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	/* Stop device till opened */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	icn8318_stop(data->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	error = input_register_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	i2c_set_clientdata(client, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static const struct of_device_id icn8318_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	{ .compatible = "chipone,icn8318" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) MODULE_DEVICE_TABLE(of, icn8318_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /* This is useless for OF-enabled devices, but it is needed by I2C subsystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static const struct i2c_device_id icn8318_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) MODULE_DEVICE_TABLE(i2c, icn8318_i2c_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static struct i2c_driver icn8318_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		.name	= "chipone_icn8318",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		.pm	= &icn8318_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		.of_match_table = icn8318_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	.probe = icn8318_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	.id_table = icn8318_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) module_i2c_driver(icn8318_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) MODULE_DESCRIPTION("ChipOne icn8318 I2C Touchscreen Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) MODULE_LICENSE("GPL");