diff options
Diffstat (limited to 'drivers/input/touchscreen/egalax_ts.c')
| -rw-r--r-- | drivers/input/touchscreen/egalax_ts.c | 77 |
1 files changed, 36 insertions, 41 deletions
diff --git a/drivers/input/touchscreen/egalax_ts.c b/drivers/input/touchscreen/egalax_ts.c index 752ae9cf4514..eb3cc2befcdf 100644 --- a/drivers/input/touchscreen/egalax_ts.c +++ b/drivers/input/touchscreen/egalax_ts.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Driver for EETI eGalax Multiple Touch Controller * * Copyright (C) 2011 Freescale Semiconductor, Inc. * * based on max11801_ts.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ /* EETI eGalax serial touch screen controller is a I2C based multiple @@ -17,17 +14,18 @@ - auto idle mode support */ +#include <linux/err.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/irq.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/delay.h> #include <linux/slab.h> +#include <linux/string_choices.h> #include <linux/bitops.h> #include <linux/input/mt.h> -#include <linux/of_gpio.h> /* * Mouse Mode: some panel may configure the controller to mouse mode, @@ -105,7 +103,7 @@ static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id) input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, down); dev_dbg(&client->dev, "%s id:%d x:%d y:%d z:%d", - down ? "down" : "up", id, x, y, z); + str_down_up(down), id, x, y, z); if (down) { input_report_abs(input_dev, ABS_MT_POSITION_X, x); @@ -122,32 +120,26 @@ static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id) /* wake up controller by an falling edge of interrupt gpio. */ static int egalax_wake_up_device(struct i2c_client *client) { - struct device_node *np = client->dev.of_node; - int gpio; + struct gpio_desc *gpio; int ret; - if (!np) - return -ENODEV; - - gpio = of_get_named_gpio(np, "wakeup-gpios", 0); - if (!gpio_is_valid(gpio)) - return -ENODEV; - - ret = gpio_request(gpio, "egalax_irq"); - if (ret < 0) { - dev_err(&client->dev, - "request gpio failed, cannot wake up controller: %d\n", - ret); + /* wake up controller via an falling edge on IRQ gpio. */ + gpio = gpiod_get(&client->dev, "wakeup", GPIOD_OUT_HIGH); + ret = PTR_ERR_OR_ZERO(gpio); + if (ret) { + if (ret != -EPROBE_DEFER) + dev_err(&client->dev, + "failed to request wakeup gpio, cannot wake up controller: %d\n", + ret); return ret; } - /* wake up controller via an falling edge on IRQ gpio. */ - gpio_direction_output(gpio, 0); - gpio_set_value(gpio, 1); + /* release the line */ + gpiod_set_value_cansleep(gpio, 0); - /* controller should be waken up, return irq. */ - gpio_direction_input(gpio); - gpio_free(gpio); + /* controller should be woken up, return irq. */ + gpiod_direction_input(gpio); + gpiod_put(gpio); return 0; } @@ -164,8 +156,7 @@ static int egalax_firmware_version(struct i2c_client *client) return 0; } -static int egalax_ts_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int egalax_ts_probe(struct i2c_client *client) { struct egalax_ts *ts; struct input_dev *input_dev; @@ -188,10 +179,8 @@ static int egalax_ts_probe(struct i2c_client *client, /* controller may be in sleep, wake it up. */ error = egalax_wake_up_device(client); - if (error) { - dev_err(&client->dev, "Failed to wake up the controller\n"); + if (error) return error; - } error = egalax_firmware_version(client); if (error < 0) { @@ -214,10 +203,9 @@ static int egalax_ts_probe(struct i2c_client *client, ABS_MT_POSITION_Y, 0, EGALAX_MAX_Y, 0, 0); input_mt_init_slots(input_dev, MAX_SUPPORT_POINTS, 0); - error = devm_request_threaded_irq(&client->dev, client->irq, NULL, - egalax_ts_interrupt, - IRQF_TRIGGER_LOW | IRQF_ONESHOT, - "egalax_ts", ts); + error = devm_request_threaded_irq(&client->dev, client->irq, + NULL, egalax_ts_interrupt, + IRQF_ONESHOT, "egalax_ts", ts); if (error < 0) { dev_err(&client->dev, "Failed to register interrupt\n"); return error; @@ -231,12 +219,12 @@ static int egalax_ts_probe(struct i2c_client *client, } static const struct i2c_device_id egalax_ts_id[] = { - { "egalax_ts", 0 }, + { "egalax_ts" }, { } }; MODULE_DEVICE_TABLE(i2c, egalax_ts_id); -static int __maybe_unused egalax_ts_suspend(struct device *dev) +static int egalax_ts_suspend(struct device *dev) { static const u8 suspend_cmd[MAX_I2C_DATA_LEN] = { 0x3, 0x6, 0xa, 0x3, 0x36, 0x3f, 0x2, 0, 0, 0 @@ -244,18 +232,25 @@ static int __maybe_unused egalax_ts_suspend(struct device *dev) struct i2c_client *client = to_i2c_client(dev); int ret; + if (device_may_wakeup(dev)) + return enable_irq_wake(client->irq); + ret = i2c_master_send(client, suspend_cmd, MAX_I2C_DATA_LEN); return ret > 0 ? 0 : ret; } -static int __maybe_unused egalax_ts_resume(struct device *dev) +static int egalax_ts_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); + if (device_may_wakeup(dev)) + return disable_irq_wake(client->irq); + return egalax_wake_up_device(client); } -static SIMPLE_DEV_PM_OPS(egalax_ts_pm_ops, egalax_ts_suspend, egalax_ts_resume); +static DEFINE_SIMPLE_DEV_PM_OPS(egalax_ts_pm_ops, + egalax_ts_suspend, egalax_ts_resume); static const struct of_device_id egalax_ts_dt_ids[] = { { .compatible = "eeti,egalax_ts" }, @@ -266,7 +261,7 @@ MODULE_DEVICE_TABLE(of, egalax_ts_dt_ids); static struct i2c_driver egalax_ts_driver = { .driver = { .name = "egalax_ts", - .pm = &egalax_ts_pm_ops, + .pm = pm_sleep_ptr(&egalax_ts_pm_ops), .of_match_table = egalax_ts_dt_ids, }, .id_table = egalax_ts_id, |