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Commit 0085ca6d authored by Fei Mao's avatar Fei Mao Committed by Gerrit - the friendly Code Review server
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input: touchscreen: shutdown ST touch's power supply when suspend 



To avoid the current leakage, disable/enable power supply when device
suspend/resume.

Change-Id: Icee571a3accb743a7609bc197d7a6e16bc32608b
Signed-off-by: default avatarFei Mao <feim1@codeaurora.org>
parent 26348a70

drivers/input/touchscreen/st/fts.c

+46 −7
Original line number Diff line number Diff line
@@ -3835,6 +3835,47 @@ static int fts_mode_handler(struct fts_ts_info *info, int force) 
	return res;

}



int fts_chip_power_switch(struct fts_ts_info *info, int on)

{

	int error = 0;



	logError(0, "%s %s:will set power mode %d...\n", tag, __func__, on);

	if (on == 0) {

		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__);



		}

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

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

	} else if (on == 1) {

		if (info->bus_reg) {

			error = regulator_enable(info->bus_reg);

			if (error < 0)

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

					tag, __func__);

		}

		if (info->pwr_reg) {

			error = regulator_enable(info->pwr_reg);

			if (error < 0)

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

					tag, __func__);

		}



	}



	return error;

}





static void fts_resume_work(struct work_struct *work)

{
@@ -3845,22 +3886,19 @@ static void fts_resume_work(struct work_struct *work) 
	__pm_wakeup_event(&info->wakeup_source, HZ);



	info->resume_bit = 1;

	fts_chip_power_switch(info, 1);

#ifdef USE_NOISE_PARAM

	readNoiseParameters(noise_params);

#endif

	fts_system_reset();



	cleanUp(1);

#ifdef USE_NOISE_PARAM

	writeNoiseParameters(noise_params);

#endif



	release_all_touches(info);



	fts_mode_handler(info, 0);



	info->sensor_sleep = false;



	fts_enableInterrupt();

}
@@ -3875,11 +3913,12 @@ static void fts_suspend_work(struct work_struct *work) 
	info->resume_bit = 0;



	fts_mode_handler(info, 0);



	release_all_touches(info);

	info->sensor_sleep = true;



	fts_enableInterrupt();

	fts_disableInterrupt();

	fts_chip_power_switch(info, 0);



}