Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * cy8c4014/cy8c4024 touch pad driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * it under the terms of the GNU General Public License as published by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * the Free Software Foundation; either version 2 of the License, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * (at your option) any later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * This program is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * GNU General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^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/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/hrtimer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/async.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/input/mt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include "tp_suspend.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <linux/wakelock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) struct cy8c_chipdef {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	int max_x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	int max_y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	int multi_touch_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	u8 reg_base;
^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 cy8c_touch {
^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;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct work_struct work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct workqueue_struct *wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct tp_device tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	const struct cy8c_chipdef *cdef;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) static const struct cy8c_chipdef cy8c4014_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	.max_x = 0xfe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	.max_y = 0xfe, /* only have x axis */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	.multi_touch_num = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	.reg_base = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static u32 i2c_cy8ctouch_read(struct cy8c_touch *ts,  u8 *buf, u32 num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct i2c_client *client = ts->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	u8 reg = ts->cdef->reg_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct i2c_msg xfer_msg[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	xfer_msg[0].addr = client->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	xfer_msg[0].len = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	xfer_msg[0].flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	xfer_msg[0].buf = &reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	xfer_msg[1].addr = client->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	xfer_msg[1].len = num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	xfer_msg[1].flags = I2C_M_RD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	xfer_msg[1].buf = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	ret = i2c_transfer(client->adapter, xfer_msg, ARRAY_SIZE(xfer_msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (ret != ARRAY_SIZE(xfer_msg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static irqreturn_t cy8ctouch_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct cy8c_touch *ts = (struct cy8c_touch *)dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	disable_irq_nosync(ts->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	queue_work(ts->wq, &ts->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) static void cy8ctouch_ts_worker(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct cy8c_touch *ts = container_of(work, struct cy8c_touch, work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct i2c_client *client = ts->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	const struct cy8c_chipdef *cdef = ts->cdef;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		u8 cur_x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		u8 cur_y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	} pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	rc = i2c_cy8ctouch_read(ts, (u8 *)&pos, sizeof(pos));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (rc != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		dev_err(&client->dev, "i2c read failed, ret = %d, line:%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			rc, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		enable_irq(ts->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (pos.cur_x <= cdef->max_x && pos.cur_y <= cdef->max_y) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		/* finger down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		dev_dbg(&client->dev, "Touch down, position is %d : %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			pos.cur_x, pos.cur_y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		input_report_abs(ts->input, ABS_X, pos.cur_x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		input_report_abs(ts->input, ABS_Y, pos.cur_y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		input_report_key(ts->input, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		input_sync(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	} else if (pos.cur_x == 0xff && pos.cur_y == 0xff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		/* finger up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		dev_dbg(&client->dev, "Touch up, position is %d : %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			pos.cur_x, pos.cur_y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		input_report_key(ts->input, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		input_sync(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	enable_irq(ts->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int cy8ctouch_init(struct i2c_client *client, struct cy8c_touch *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct input_dev *input_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	INIT_WORK(&ts->work, cy8ctouch_ts_worker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	ts->wq = create_singlethread_workqueue("cy8c_touchpad_wq");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	if (!ts->wq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		dev_err(&client->dev, "Create workqueue failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	input_device = devm_input_allocate_device(&ts->client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (!input_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		dev_err(&client->dev, "Allocate input device failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		destroy_workqueue(ts->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	ts->input = input_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	input_device->name = "cy8c_touchpad";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	input_device->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	input_device->dev.parent = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	input_set_drvdata(input_device, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	__set_bit(EV_ABS, input_device->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	__set_bit(EV_KEY, input_device->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	__set_bit(BTN_TOUCH, input_device->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	if (ts->cdef->max_x > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		__set_bit(ABS_X, input_device->absbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		input_set_abs_params(input_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				     ABS_X, 0, ts->cdef->max_x, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		dev_err(&client->dev, "max_x is zero, touchpad don't have x axis\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (ts->cdef->max_y > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		__set_bit(ABS_Y, input_device->absbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		input_set_abs_params(input_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 				     ABS_Y, 0, ts->cdef->max_y, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		dev_err(&client->dev, "max_y is zero, touchpad don't have y axis\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	rc = input_register_device(input_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		goto error_unreg_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) error_unreg_device:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	destroy_workqueue(ts->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static int cy8ctouch_suspend(struct  tp_device *tp_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	struct cy8c_touch *ts = container_of(tp_dev, struct cy8c_touch, tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	dev_info(&ts->client->dev, "[cy8ctouch] Enter %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int cy8ctouch_resume(struct  tp_device *tp_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct cy8c_touch *ts = container_of(tp_dev, struct cy8c_touch, tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	dev_info(&ts->client->dev, "[cy8ctouch] Enter %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static const struct of_device_id of_cy8ctouch_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	{.compatible = "cypress,cy8c4014", .data = &cy8c4014_data},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	{.compatible = "cypress,cy8c4024", .data = &cy8c4014_data},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) MODULE_DEVICE_TABLE(of, of_cy8ctouch_dt_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) cy8ctouch_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	const struct of_device_id *of_dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	struct cy8c_touch *ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		dev_err(&client->dev, "cy8ctouch I2C functionality not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	of_dev_id = of_match_device(of_cy8ctouch_dt_ids, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (!of_dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	if (!ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	ts->tp.tp_suspend = cy8ctouch_suspend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	ts->tp.tp_resume = cy8ctouch_resume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	tp_register_fb(&ts->tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	ts->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	i2c_set_clientdata(client, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	ts->cdef = of_dev_id->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	rc = cy8ctouch_init(client, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		dev_err(&client->dev, "cy8ctouch init failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		goto porbe_err_ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	if (client->irq > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		rc = devm_request_irq(dev, client->irq, cy8ctouch_irq, IRQF_TRIGGER_FALLING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 				      client->name, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			dev_err(&client->dev, "cy8ctouch_probe: request irq failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 			goto porbe_err_ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) porbe_err_ret:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static int cy8ctouch_i2c_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	struct cy8c_touch *ts = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	cancel_work_sync(&ts->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	destroy_workqueue(ts->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static const struct i2c_device_id cy8ctouch_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	{ "cy8c4014", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	{ "cy8c4024", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static struct i2c_driver cy8ctouch_i2c_driver  = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		.name  = "cy8c_touchpad",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		.of_match_table = of_match_ptr(of_cy8ctouch_dt_ids),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	.probe		= cy8ctouch_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	.remove		= cy8ctouch_i2c_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	.id_table	= cy8ctouch_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) module_i2c_driver(cy8ctouch_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) MODULE_AUTHOR("Wenping Zhang <zwp@rock-chips.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) MODULE_DESCRIPTION("Cypress Cy8cxxxx touchpad driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) MODULE_LICENSE("GPL v2");