diff options
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/atmel_mxt_ts.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index aeb46522073a..7659bc48f1db 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -28,6 +28,7 @@ #include <linux/interrupt.h> #include <linux/of.h> #include <linux/slab.h> +#include <linux/gpio/consumer.h> #include <asm/unaligned.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> @@ -300,6 +301,7 @@ struct mxt_data { u8 multitouch; struct t7_config t7_cfg; struct mxt_dbg dbg; + struct gpio_desc *reset_gpio; /* Cached parameters from object table */ u16 T5_address; @@ -3133,6 +3135,14 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) init_completion(&data->reset_completion); init_completion(&data->crc_completion); + data->reset_gpio = devm_gpiod_get_optional(&client->dev, + "reset", GPIOD_OUT_LOW); + if (IS_ERR(data->reset_gpio)) { + error = PTR_ERR(data->reset_gpio); + dev_err(&client->dev, "Failed to get reset gpio: %d\n", error); + return error; + } + error = devm_request_threaded_irq(&client->dev, client->irq, NULL, mxt_interrupt, pdata->irqflags | IRQF_ONESHOT, @@ -3142,6 +3152,18 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) return error; } + if (data->reset_gpio) { + data->in_bootloader = true; + msleep(MXT_RESET_TIME); + reinit_completion(&data->bl_completion); + gpiod_set_value(data->reset_gpio, 1); + error = mxt_wait_for_completion(data, &data->bl_completion, + MXT_RESET_TIMEOUT); + if (error) + return error; + data->in_bootloader = false; + } + disable_irq(client->irq); error = mxt_initialize(data); |