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Input: edt-ft5x06 - add support for regulator 

Add the support for enabling optional regulator that may be used as VCC
source.

Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
Signed-off-by: Ondrej Jirman <megous@megous.com>
Reviewed-by: Rob Herring <robh@kernel.org> # bindings
Link: https://lore.kernel.org/r/20191029005806.3577376-2-megous@megous.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Mylène Josserand 2019-10-28 20:56:23 -07:00 committed by Dmitry Torokhov
parent a1b92973fb
commit 7448bfec6b
2 changed files with 31 additions and 0 deletions
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1
Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
View File

@ -30,6 +30,7 @@ Required properties:
Optional properties:
- reset-gpios: GPIO specification for the RESET input
- wake-gpios: GPIO specification for the WAKE input
- vcc-supply: Regulator that supplies the touchscreen
- pinctrl-names: should be "default"
- pinctrl-0: a phandle pointing to the pin settings for the

30
drivers/input/touchscreen/edt-ft5x06.c
View File

@ -28,6 +28,7 @@
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <asm/unaligned.h>
#include <linux/regulator/consumer.h>
#define WORK_REGISTER_THRESHOLD 0x00
#define WORK_REGISTER_REPORT_RATE 0x08
@ -88,6 +89,7 @@ struct edt_ft5x06_ts_data {
struct touchscreen_properties prop;
u16 num_x;
u16 num_y;
struct regulator *vcc;
struct gpio_desc *reset_gpio;
struct gpio_desc *wake_gpio;
@ -1036,6 +1038,13 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
}
}
static void edt_ft5x06_disable_regulator(void *arg)
{
struct edt_ft5x06_ts_data *data = arg;
regulator_disable(data->vcc);
}
static int edt_ft5x06_ts_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -1064,6 +1073,27 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
tsdata->max_support_points = chip_data->max_support_points;
tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
if (IS_ERR(tsdata->vcc)) {
error = PTR_ERR(tsdata->vcc);
if (error != -EPROBE_DEFER)
dev_err(&client->dev,
"failed to request regulator: %d\n", error);
return error;
}
error = regulator_enable(tsdata->vcc);
if (error < 0) {
dev_err(&client->dev, "failed to enable vcc: %d\n", error);
return error;
}
error = devm_add_action_or_reset(&client->dev,
edt_ft5x06_disable_regulator,
tsdata);
if (error)
return error;
tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
"reset", GPIOD_OUT_HIGH);
if (IS_ERR(tsdata->reset_gpio)) {