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Subject[PATCH 4/5] proximity: vl53l0x: Handle the reset GPIO
Date
Handle the GPIO connected to the XSHUT/RST_N pin of VL53L0X.

Signed-off-by: Markuss Broks <markuss.broks@gmail.com>
---
drivers/iio/proximity/vl53l0x-i2c.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/iio/proximity/vl53l0x-i2c.c b/drivers/iio/proximity/vl53l0x-i2c.c
index 74aeb2548ef6..47022bc1504e 100644
--- a/drivers/iio/proximity/vl53l0x-i2c.c
+++ b/drivers/iio/proximity/vl53l0x-i2c.c
@@ -15,6 +15,7 @@
*/

#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
@@ -43,6 +44,7 @@ struct vl53l0x_data {
struct i2c_client *client;
struct completion completion;
struct regulator *vdd_supply;
+ struct gpio_desc *reset_gpio;
};

static irqreturn_t vl53l0x_handle_irq(int irq, void *priv)
@@ -192,6 +194,8 @@ static void vl53l0x_power_off(void *_data)
{
struct vl53l0x_data *data = _data;

+ gpiod_set_value_cansleep(data->reset_gpio, 1);
+
regulator_disable(data->vdd_supply);
}

@@ -203,6 +207,8 @@ static int vl53l0x_power_on(struct vl53l0x_data *data)
if (ret)
return ret;

+ gpiod_set_value_cansleep(data->reset_gpio, 0);
+
usleep_range(3200, 5000);

return 0;
@@ -232,6 +238,11 @@ static int vl53l0x_probe(struct i2c_client *client)
return dev_err_probe(&client->dev, PTR_ERR(data->vdd_supply),
"Unable to get VDD regulator\n");

+ data->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(data->reset_gpio))
+ return dev_err_probe(&client->dev, PTR_ERR(data->reset_gpio),
+ "Cannot get reset GPIO\n");
+
error = devm_add_action_or_reset(&client->dev, vl53l0x_power_off, data);
if (error)
return dev_err_probe(&client->dev, error,
--
2.35.1
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