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Commit 550c106e authored by Mohan Pallaka's avatar Mohan Pallaka Committed by Sudhakar Manapati
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input: ft5x06_ts: Disable regulators in suspend 



Disable/enable the regulators in suspend/resume to
have better power savings.

  This patch is propagated from 3.4 kernel
    commit: f7ee45ea77d1a8d24aede0eba7efd2f44b456d70
    input: ft5x06_ts: Disable regulators in suspend

Change-Id: I8aa7e941f20040955d6cc177e70ed38dbd28af8c
Signed-off-by: default avatarMohan Pallaka <mpallaka@codeaurora.org>
parent 77ab5456

drivers/input/touchscreen/ft5x06_ts.c

+39 −0
Original line number Diff line number Diff line
@@ -491,6 +491,7 @@ static int ft5x06_ts_suspend(struct device *dev) 
{

	struct ft5x06_ts_data *data = dev_get_drvdata(dev);

	char txbuf[2], i;

	int err;



	if (data->loading_fw) {

		dev_info(dev, "Firmware loading in process...\n");
@@ -518,20 +519,58 @@ static int ft5x06_ts_suspend(struct device *dev) 
		ft5x06_i2c_write(data->client, txbuf, sizeof(txbuf));

	}



	if (data->pdata->power_on) {

		err = data->pdata->power_on(false);

		if (err) {

			dev_err(dev, "power off failed");

			goto pwr_off_fail;

		}

	} else {

		err = ft5x06_power_on(data, false);

		if (err) {

			dev_err(dev, "power off failed");

			goto pwr_off_fail;

		}

	}



	data->suspended = true;



	return 0;



pwr_off_fail:

	if (gpio_is_valid(data->pdata->reset_gpio)) {

		gpio_set_value_cansleep(data->pdata->reset_gpio, 0);

		msleep(FT_RESET_DLY);

		gpio_set_value_cansleep(data->pdata->reset_gpio, 1);

	}

	enable_irq(data->client->irq);

	return err;

}



static int ft5x06_ts_resume(struct device *dev)

{

	struct ft5x06_ts_data *data = dev_get_drvdata(dev);

	int err;



	if (!data->suspended) {

		dev_info(dev, "Already in awake state\n");

		return 0;

	}



	if (data->pdata->power_on) {

		err = data->pdata->power_on(true);

		if (err) {

			dev_err(dev, "power on failed");

			return err;

		}

	} else {

		err = ft5x06_power_on(data, true);

		if (err) {

			dev_err(dev, "power on failed");

			return err;

		}

	}



	if (gpio_is_valid(data->pdata->reset_gpio)) {

		gpio_set_value_cansleep(data->pdata->reset_gpio, 0);

		msleep(FT_RESET_DLY);