input: sensors: add pinctrl support for akm09911 (5c1b13a2) · Commits · e / devices / android_kernel_sony_msm8994

Documentation/devicetree/bindings/input/misc/akm09911.txt

+6 −0

Original line number	Diff line number	Diff line
		@@ -4,6 +4,9 @@ Required properties:

		- compatible : Should be "ak,ak09911" or "akm,akm09911".
		- reg : i2c address of the device.
		- pinctrl-names : The pinctrl configration names of this sensor driver. Should be "default","reset".
		- pinctrl-0 : The pinctrl node corresponding to "default", should be <&akm_default>.
		- pinctrl-1 : The pinctrl node corresponding to "reset", should be <&akm_reset>.
		- vdd-supply : Analog power supply needed to power up the device.
		- vio-supply : Digital IO power supply needed for IO and I2C.
		- akm,layout : The layout of the ecompass sensor chip. There are 8
		@@ -23,6 +26,9 @@ Required properties:
		akm@c {
		compatible = "ak,ak09911";
		reg = <0x0c>;
		pinctrl-names = "default","reset";
		pinctrl-0 = <&akm_default>;
		pinctrl-1 = <&akm_reset>;
		vdd-supply = <&pm8110_l19>;
		vio-supply = <&pm8110_l14>;
		akm,layout = <0x0>;

drivers/input/misc/akm09911.c

+60 −5

Original line number	Diff line number	Diff line
		@@ -52,6 +52,9 @@ struct akm_compass_data {
		struct input_dev *input;
		struct device *class_dev;
		struct class *compass;
		struct pinctrl *pinctrl;
		struct pinctrl_state *pin_default;
		struct pinctrl_state *pin_reset;

		wait_queue_head_t drdy_wq;
		wait_queue_head_t open_wq;
		@@ -236,6 +239,7 @@ static int AKECS_Reset(
		int hard)
		{
		int err;
		struct i2c_client *client = akm->i2c;

		#if AKM_HAS_RESET
		uint8_t buffer[2];
		@@ -244,10 +248,26 @@ static int AKECS_Reset(
		mutex_lock(&akm->sensor_mutex);

		if (hard != 0) {
		if (!IS_ERR_OR_NULL(s_akm->pinctrl)) {
		err = pinctrl_select_state(s_akm->pinctrl,
		s_akm->pin_reset);
		if (err) {
		dev_err(&client->dev, "can't select state!!\n");
		goto exit;
		}
		udelay(5);
		err = pinctrl_select_state(s_akm->pinctrl,
		s_akm->pin_default);
		if (err) {
		dev_err(&client->dev, "can't select state!!\n");
		goto exit;
		}
		} else {
		gpio_set_value(akm->gpio_rstn, 0);
		udelay(5);
		gpio_set_value(akm->gpio_rstn, 1);
		/* No error is returned */
		}
		err = 0;
		} else {
		buffer[0] = AKM_REG_RESET;
		@@ -265,7 +285,7 @@ static int AKECS_Reset(
		/* Clear status */
		akm->is_busy = 0;
		atomic_set(&akm->drdy, 0);

		exit:
		mutex_unlock(&akm->sensor_mutex);
		/*** unlock ***/

		@@ -1524,6 +1544,31 @@ static int akm_compass_parse_dt(struct device *dev,
		}
		#endif /* !CONFIG_OF */

		static int akm_pinctrl_init(struct akm_compass_data *s_akm)
		{
		struct i2c_client *client = s_akm->i2c;

		s_akm->pinctrl = devm_pinctrl_get(&client->dev);
		if (IS_ERR_OR_NULL(s_akm->pinctrl)) {
		dev_err(&client->dev, "Failed to get pinctrl\n");
		return PTR_ERR(s_akm->pinctrl);
		}

		s_akm->pin_default = pinctrl_lookup_state(s_akm->pinctrl, "default");
		if (IS_ERR_OR_NULL(s_akm->pin_default)) {
		dev_err(&client->dev, "Failed to look up default state\n");
		return PTR_ERR(s_akm->pin_default);
		}

		s_akm->pin_reset = pinctrl_lookup_state(s_akm->pinctrl, "reset");
		if (IS_ERR_OR_NULL("s_akm->pin_reset")) {
		dev_err(&client->dev, "Failed to look up reset state\n");
		return PTR_ERR(s_akm->pin_reset);
		}

		return 0;
		}

		int akm_compass_probe(struct i2c_client client, const struct i2c_device_id id)
		{
		struct akm09911_platform_data *pdata;
		@@ -1597,6 +1642,16 @@ int akm_compass_probe(struct i2c_client client, const struct i2c_device_id id)
		s_akm->i2c = client;
		/* set client data */
		i2c_set_clientdata(client, s_akm);

		/* initialize pinctrl */
		if (!akm_pinctrl_init(s_akm)) {
		err = pinctrl_select_state(s_akm->pinctrl, s_akm->pin_default);
		if (err) {
		dev_err(&client->dev, "Can't select pinctrl state\n");
		goto exit2;
		}
		}

		/* check connection */
		err = akm_compass_power_set(s_akm, 1);
		if (err < 0)