Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * TM2 touchkey device driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2005 Phil Blundell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright 2016 Samsung Electronics Co., Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Author: Beomho Seo <beomho.seo@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Author: Jaechul Lee <jcsing.lee@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define TM2_TOUCHKEY_DEV_NAME		"tm2-touchkey"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define ARIES_TOUCHKEY_CMD_LED_ON	0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define ARIES_TOUCHKEY_CMD_LED_OFF	0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define TM2_TOUCHKEY_CMD_LED_ON		0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define TM2_TOUCHKEY_CMD_LED_OFF	0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define TM2_TOUCHKEY_BIT_PRESS_EV	BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define TM2_TOUCHKEY_BIT_KEYCODE	GENMASK(2, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define TM2_TOUCHKEY_LED_VOLTAGE_MIN	2500000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define TM2_TOUCHKEY_LED_VOLTAGE_MAX	3300000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) struct touchkey_variant {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	u8 keycode_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	u8 base_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	u8 cmd_led_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	u8 cmd_led_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	bool no_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	bool fixed_regulator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) struct tm2_touchkey_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct led_classdev led_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct regulator *vdd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct regulator_bulk_data regulators[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	const struct touchkey_variant *variant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	u32 keycodes[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	int num_keycodes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static const struct touchkey_variant tm2_touchkey_variant = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	.keycode_reg = 0x03,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	.base_reg = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	.cmd_led_on = TM2_TOUCHKEY_CMD_LED_ON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	.cmd_led_off = TM2_TOUCHKEY_CMD_LED_OFF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) static const struct touchkey_variant midas_touchkey_variant = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	.keycode_reg = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	.base_reg = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	.cmd_led_on = TM2_TOUCHKEY_CMD_LED_ON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	.cmd_led_off = TM2_TOUCHKEY_CMD_LED_OFF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static struct touchkey_variant aries_touchkey_variant = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	.no_reg = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	.fixed_regulator = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	.cmd_led_on = ARIES_TOUCHKEY_CMD_LED_ON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	.cmd_led_off = ARIES_TOUCHKEY_CMD_LED_OFF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) static const struct touchkey_variant tc360_touchkey_variant = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	.keycode_reg = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	.base_reg = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	.fixed_regulator = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	.cmd_led_on = TM2_TOUCHKEY_CMD_LED_ON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	.cmd_led_off = TM2_TOUCHKEY_CMD_LED_OFF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static int tm2_touchkey_led_brightness_set(struct led_classdev *led_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 					    enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct tm2_touchkey_data *touchkey =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		container_of(led_dev, struct tm2_touchkey_data, led_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	u32 volt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	u8 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (brightness == LED_OFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		volt = TM2_TOUCHKEY_LED_VOLTAGE_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		data = touchkey->variant->cmd_led_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		volt = TM2_TOUCHKEY_LED_VOLTAGE_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		data = touchkey->variant->cmd_led_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (!touchkey->variant->fixed_regulator)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		regulator_set_voltage(touchkey->vdd, volt, volt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	return touchkey->variant->no_reg ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		i2c_smbus_write_byte(touchkey->client, data) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		i2c_smbus_write_byte_data(touchkey->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 					  touchkey->variant->base_reg, data);
^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) static int tm2_touchkey_power_enable(struct tm2_touchkey_data *touchkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	error = regulator_bulk_enable(ARRAY_SIZE(touchkey->regulators),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 				      touchkey->regulators);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	/* waiting for device initialization, at least 150ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	msleep(150);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static void tm2_touchkey_power_disable(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	struct tm2_touchkey_data *touchkey = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	regulator_bulk_disable(ARRAY_SIZE(touchkey->regulators),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			       touchkey->regulators);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static irqreturn_t tm2_touchkey_irq_handler(int irq, void *devid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	struct tm2_touchkey_data *touchkey = devid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	int data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (touchkey->variant->no_reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		data = i2c_smbus_read_byte(touchkey->client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		data = i2c_smbus_read_byte_data(touchkey->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 						touchkey->variant->keycode_reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (data < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		dev_err(&touchkey->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			"failed to read i2c data: %d\n", data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	index = (data & TM2_TOUCHKEY_BIT_KEYCODE) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (index < 0 || index >= touchkey->num_keycodes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		dev_warn(&touchkey->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			 "invalid keycode index %d\n", index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (data & TM2_TOUCHKEY_BIT_PRESS_EV) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		for (i = 0; i < touchkey->num_keycodes; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			input_report_key(touchkey->input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 					 touchkey->keycodes[i], 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		input_report_key(touchkey->input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 				 touchkey->keycodes[index], 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	input_sync(touchkey->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (touchkey->variant->fixed_regulator &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 				data & TM2_TOUCHKEY_BIT_PRESS_EV) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		/* touch turns backlight on, so make sure we're in sync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		if (touchkey->led_dev.brightness == LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			tm2_touchkey_led_brightness_set(&touchkey->led_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 							LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static int tm2_touchkey_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			      const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	struct device_node *np = client->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	struct tm2_touchkey_data *touchkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		dev_err(&client->dev, "incompatible I2C adapter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	touchkey = devm_kzalloc(&client->dev, sizeof(*touchkey), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (!touchkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	touchkey->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	i2c_set_clientdata(client, touchkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	touchkey->variant = of_device_get_match_data(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	touchkey->regulators[0].supply = "vcc";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	touchkey->regulators[1].supply = "vdd";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	error = devm_regulator_bulk_get(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 					ARRAY_SIZE(touchkey->regulators),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 					touchkey->regulators);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		dev_err(&client->dev, "failed to get regulators: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	/* Save VDD for easy access */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	touchkey->vdd = touchkey->regulators[1].consumer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	touchkey->num_keycodes = of_property_read_variable_u32_array(np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 					"linux,keycodes", touchkey->keycodes, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 					ARRAY_SIZE(touchkey->keycodes));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (touchkey->num_keycodes <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		/* default keycodes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		touchkey->keycodes[0] = KEY_PHONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		touchkey->keycodes[1] = KEY_BACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		touchkey->num_keycodes = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	error = tm2_touchkey_power_enable(touchkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		dev_err(&client->dev, "failed to power up device: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	error = devm_add_action_or_reset(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 					 tm2_touchkey_power_disable, touchkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 			"failed to install poweroff handler: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	/* input device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	touchkey->input_dev = devm_input_allocate_device(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (!touchkey->input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		dev_err(&client->dev, "failed to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	touchkey->input_dev->name = TM2_TOUCHKEY_DEV_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	touchkey->input_dev->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	for (i = 0; i < touchkey->num_keycodes; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		input_set_capability(touchkey->input_dev, EV_KEY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 				     touchkey->keycodes[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	error = input_register_device(touchkey->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			"failed to register input device: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	error = devm_request_threaded_irq(&client->dev, client->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 					  NULL, tm2_touchkey_irq_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 					  IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 					  TM2_TOUCHKEY_DEV_NAME, touchkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			"failed to request threaded irq: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	/* led device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	touchkey->led_dev.name = TM2_TOUCHKEY_DEV_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	touchkey->led_dev.brightness = LED_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	touchkey->led_dev.max_brightness = LED_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	touchkey->led_dev.brightness_set_blocking =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 					tm2_touchkey_led_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	error = devm_led_classdev_register(&client->dev, &touchkey->led_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			"failed to register touchkey led: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	if (touchkey->variant->fixed_regulator)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		tm2_touchkey_led_brightness_set(&touchkey->led_dev, LED_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static int __maybe_unused tm2_touchkey_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	struct tm2_touchkey_data *touchkey = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	disable_irq(client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	tm2_touchkey_power_disable(touchkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static int __maybe_unused tm2_touchkey_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	struct tm2_touchkey_data *touchkey = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	enable_irq(client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	ret = tm2_touchkey_power_enable(touchkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		dev_err(dev, "failed to enable power: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) static SIMPLE_DEV_PM_OPS(tm2_touchkey_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 			 tm2_touchkey_suspend, tm2_touchkey_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static const struct i2c_device_id tm2_touchkey_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	{ TM2_TOUCHKEY_DEV_NAME, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) MODULE_DEVICE_TABLE(i2c, tm2_touchkey_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) static const struct of_device_id tm2_touchkey_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		.compatible = "cypress,tm2-touchkey",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		.data = &tm2_touchkey_variant,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	}, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		.compatible = "cypress,midas-touchkey",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		.data = &midas_touchkey_variant,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	}, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		.compatible = "cypress,aries-touchkey",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		.data = &aries_touchkey_variant,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	}, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		.compatible = "coreriver,tc360-touchkey",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		.data = &tc360_touchkey_variant,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) MODULE_DEVICE_TABLE(of, tm2_touchkey_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static struct i2c_driver tm2_touchkey_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		.name = TM2_TOUCHKEY_DEV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		.pm = &tm2_touchkey_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		.of_match_table = of_match_ptr(tm2_touchkey_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	.probe = tm2_touchkey_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	.id_table = tm2_touchkey_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) module_i2c_driver(tm2_touchkey_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) MODULE_AUTHOR("Jaechul Lee <jcsing.lee@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) MODULE_DESCRIPTION("Samsung touchkey driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) MODULE_LICENSE("GPL v2");