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Commit 5fc3d012 authored by Xin Hua Lu's avatar Xin Hua Lu Committed by Gerrit - the friendly Code Review server
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input: touchscreen: st: power down when suspend 



Shut down power supply regulators when device suspend.

Change-Id: Ibda696bd643ba8fa285c57c45160e3a554174fd6
Signed-off-by: default avatarXin Hua Lu <luxinhua@codeaurora.org>
parent eedfb960

drivers/input/touchscreen/st/fts.c

+84 −25
Original line number Diff line number Diff line
@@ -4062,26 +4062,94 @@ static int fts_mode_handler(struct fts_ts_info *info, int force) 
	return res;

}



static void fts_resume_work(struct work_struct *work)

static int fts_chip_power_switch(struct fts_ts_info *info, bool on)

{

	struct fts_ts_info *info;

	int error = -1;



	info = container_of(work, struct fts_ts_info, resume_work);

	if (info->bdata->pwr_on_suspend) {

		if (!info->ts_pinctrl)

			return 0;



	__pm_wakeup_event(&info->wakeup_source, HZ);

		if (on) {

			error = pinctrl_select_state(info->ts_pinctrl,

				info->pinctrl_state_active);

			if (error < 0)

				logError(1, "%s: Failed to select %s\n",

					__func__, PINCTRL_STATE_ACTIVE);

		} else {

			error = pinctrl_select_state(info->ts_pinctrl,

				info->pinctrl_state_suspend);

			if (error < 0)

				logError(1, "%s: Failed to select %s\n",

					__func__, PINCTRL_STATE_SUSPEND);

		}



		return 0;

	}



	if (on) {

		if (info->pwr_reg) {

			error = regulator_enable(info->bus_reg);

			if (error < 0)

				logError(1, "%s %s: Failed to enable AVDD\n",

					tag, __func__);

		}



		if (info->bus_reg) {

			error = regulator_enable(info->pwr_reg);

			if (error < 0)

				logError(1, "%s %s: Failed to enable DVDD\n",

					tag, __func__);

		}



		if (info->ts_pinctrl) {

		/*

		 * Pinctrl handle is optional. If pinctrl handle is found

		 * let pins to be configured in active state. If not

		 * found continue further without error.

		 */

			if (pinctrl_select_state(info->ts_pinctrl,

				info->pinctrl_state_active) < 0) {

			logError(1, "%s: Failed to select %s pinstate\n",

				logError(1, "%s: Failed to select %s\n",

					__func__, PINCTRL_STATE_ACTIVE);

			}

		}

	} else {

		if (info->bdata->reset_gpio != GPIO_NOT_DEFINED)

			gpio_set_value(info->bdata->reset_gpio, 0);

		else

			msleep(300);



		if (info->ts_pinctrl) {

			if (pinctrl_select_state(info->ts_pinctrl,

				info->pinctrl_state_suspend) < 0) {

				logError(1, "%s: Failed to select %s\n",

					__func__, PINCTRL_STATE_SUSPEND);

			}

		}



		if (info->pwr_reg) {

			error = regulator_disable(info->pwr_reg);

			if (error < 0)

				logError(1, "%s %s: Failed to disable DVDD\n",

					tag, __func__);

		}



		if (info->bus_reg) {

			error = regulator_disable(info->bus_reg);

			if (error < 0)

				logError(1, "%s %s: Failed to disable AVDD\n",

					tag, __func__);

		}

	}

	return error;

}





static void fts_resume_work(struct work_struct *work)

{

	struct fts_ts_info *info;



	info = container_of(work, struct fts_ts_info, resume_work);



	__pm_wakeup_event(&info->wakeup_source, HZ);



	fts_chip_power_switch(info, true);



	info->resume_bit = 1;
@@ -4119,19 +4187,7 @@ static void fts_suspend_work(struct work_struct *work) 
	release_all_touches(info);

	info->sensor_sleep = true;



	if (info->ts_pinctrl) {

		/*

		 * Pinctrl handle is optional. If pinctrl handle is found

		 * let pins to be configured in suspend state. If not

		 * found continue further without error.

		 */

		if (pinctrl_select_state(info->ts_pinctrl,

					info->pinctrl_state_suspend) < 0) {

			logError(1, "%s: Failed to select %s pinstate\n",

				__func__, PINCTRL_STATE_SUSPEND);

		}

	}



	fts_chip_power_switch(info, false);

}



#if defined(CONFIG_FB_MSM)
@@ -4459,6 +4515,9 @@ static int parse_dt(struct device *dev, 


	logError(0, "%s irq_gpio = %d\n", tag, bdata->irq_gpio);



	bdata->pwr_on_suspend =

		of_property_read_bool(np, "st,power_on_suspend");



	retval = of_property_read_string(np, "st,regulator_dvdd", &name);

	if (retval == -EINVAL)

		bdata->pwr_reg_name = NULL;

drivers/input/touchscreen/st/fts.h

+1 −0
Original line number Diff line number Diff line
@@ -196,6 +196,7 @@ struct fts_i2c_platform_data { 
	int reset_gpio;

	const char *pwr_reg_name;

	const char *bus_reg_name;

	bool pwr_on_suspend;

};



/*