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Commit 1b0bf399 authored by Shantanu Jain's avatar Shantanu Jain
Browse files

input: it7258_ts_i2c: add gpio configuration support 



Add gpio configuration support for ITE tech touchscreen
driver.

Change-Id: I261db5723a19a7084072487527b350d155a54e78
Signed-off-by: default avatarShantanu Jain <shjain@codeaurora.org>
parent 2e07b241

drivers/input/touchscreen/it7258_ts_i2c.c

+110 −39
Original line number Diff line number Diff line
@@ -1285,6 +1285,99 @@ power_off: 
	return 0;

}



static int IT7260_gpio_configure(bool on)

{

	int retval = 0;



	if (on) {

		if (gpio_is_valid(gl_ts->pdata->irq_gpio)) {

			/* configure touchscreen irq gpio */

			retval = gpio_request(gl_ts->pdata->irq_gpio,

					"ite_irq_gpio");

			if (retval) {

				dev_err(&gl_ts->client->dev,

					"unable to request irq gpio [%d]\n",

					retval);

				goto err_irq_gpio_req;

			}



			retval = gpio_direction_input(gl_ts->pdata->irq_gpio);

			if (retval) {

				dev_err(&gl_ts->client->dev,

					"unable to set direction for irq gpio [%d]\n",

					retval);

				goto err_irq_gpio_dir;

			}

		} else {

			dev_err(&gl_ts->client->dev,

				"irq gpio not provided\n");

				goto err_irq_gpio_req;

		}



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

			/* configure touchscreen reset out gpio */

			retval = gpio_request(gl_ts->pdata->reset_gpio,

					"ite_reset_gpio");

			if (retval) {

				dev_err(&gl_ts->client->dev,

					"unable to request reset gpio [%d]\n",

					retval);

					goto err_reset_gpio_req;

			}



			retval = gpio_direction_output(

					gl_ts->pdata->reset_gpio, 1);

			if (retval) {

				dev_err(&gl_ts->client->dev,

					"unable to set direction for reset gpio [%d]\n",

					retval);

				goto err_reset_gpio_dir;

			}



			if (gl_ts->pdata->low_reset)

				gpio_set_value(gl_ts->pdata->reset_gpio, 0);

			else

				gpio_set_value(gl_ts->pdata->reset_gpio, 1);



			msleep(gl_ts->pdata->reset_delay);

		} else {

			dev_err(&gl_ts->client->dev,

				"reset gpio not provided\n");

				goto err_reset_gpio_req;

		}

	} else {

		if (gpio_is_valid(gl_ts->pdata->irq_gpio))

			gpio_free(gl_ts->pdata->irq_gpio);

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

			/*

			 * This is intended to save leakage current

			 * only. Even if the call(gpio_direction_input)

			 * fails, only leakage current will be more but

			 * functionality will not be affected.

			 */

			retval = gpio_direction_input(gl_ts->pdata->reset_gpio);

			if (retval) {

				dev_err(&gl_ts->client->dev,

					"unable to set direction for gpio reset [%d]\n",

					retval);

			}

			gpio_free(gl_ts->pdata->reset_gpio);

		}

	}



	return 0;



err_reset_gpio_dir:

	if (gpio_is_valid(gl_ts->pdata->reset_gpio))

		gpio_free(gl_ts->pdata->reset_gpio);

err_reset_gpio_req:

err_irq_gpio_dir:

	if (gpio_is_valid(gl_ts->pdata->irq_gpio))

		gpio_free(gl_ts->pdata->irq_gpio);

err_irq_gpio_req:

	return retval;

}



#if CONFIG_OF

static int IT7260_get_dt_coords(struct device *dev, char *name,

				struct IT7260_ts_platform_data *pdata)
@@ -1540,36 +1633,12 @@ static int IT7260_ts_probe(struct i2c_client *client, 
				"failed to select pin to active state %d",

				ret);

		}

	}



	/* reset gpio info */

	if (gpio_is_valid(pdata->reset_gpio)) {

		if (gpio_request(pdata->reset_gpio, "ite_reset_gpio")) {

			dev_err(&client->dev,

				"gpio_request failed for reset GPIO\n");

		if (pdata->low_reset) {

			if (gpio_direction_output(pdata->reset_gpio, 0))

				dev_err(&gl_ts->client->dev,

					"gpio_direction_output for reset GPIO\n");

		} else {

			if (gpio_direction_output(pdata->reset_gpio, 1))

				dev_err(&gl_ts->client->dev,

					"gpio_direction_output for reset GPIO\n");

		}

		dev_dbg(&gl_ts->client->dev, "Reset GPIO %d\n",

							pdata->reset_gpio);

	} else {

		ret = pdata->reset_gpio;

		ret = IT7260_gpio_configure(true);

		if (ret < 0) {

			dev_err(&client->dev, "Failed to configure gpios\n");

			goto err_gpio_config;

		}



	/* irq gpio info */

	if (gpio_is_valid(pdata->irq_gpio)) {

		dev_dbg(&gl_ts->client->dev, "IRQ GPIO %d, IRQ # %d\n",

				pdata->irq_gpio, gpio_to_irq(pdata->irq_gpio));

	} else {

		ret = pdata->irq_gpio;

		goto err_gpio_config;

	}



	if (!IT7260_chipIdentify()) {
@@ -1694,12 +1763,6 @@ err_input_register: 


err_input_alloc:

err_identification_fail:

err_gpio_config:

	if (gpio_is_valid(pdata->reset_gpio))

		gpio_free(pdata->reset_gpio);

	if (gpio_is_valid(pdata->irq_gpio))

		gpio_free(pdata->irq_gpio);



	if (gl_ts->ts_pinctrl) {

		if (IS_ERR_OR_NULL(gl_ts->pinctrl_state_release)) {

			devm_pinctrl_put(gl_ts->ts_pinctrl);
@@ -1712,7 +1775,14 @@ err_gpio_config: 
					"failed to select relase pinctrl state %d\n",

					ret);

		}

	} else {

		if (gpio_is_valid(pdata->reset_gpio))

			gpio_free(pdata->reset_gpio);

		if (gpio_is_valid(pdata->irq_gpio))

			gpio_free(pdata->irq_gpio);

	}



err_gpio_config:

	IT7260_power_on(false);



err_power_device:
@@ -1741,10 +1811,6 @@ static int IT7260_ts_remove(struct i2c_client *client) 
		cancel_work_sync(&gl_ts->work_pm_relax);

		device_init_wakeup(&client->dev, false);

	}

	if (gpio_is_valid(gl_ts->pdata->reset_gpio))

		gpio_free(gl_ts->pdata->reset_gpio);

	if (gpio_is_valid(gl_ts->pdata->irq_gpio))

		gpio_free(gl_ts->pdata->irq_gpio);

	if (gl_ts->ts_pinctrl) {

		if (IS_ERR_OR_NULL(gl_ts->pinctrl_state_release)) {

			devm_pinctrl_put(gl_ts->ts_pinctrl);
@@ -1757,6 +1823,11 @@ static int IT7260_ts_remove(struct i2c_client *client) 
					"failed to select relase pinctrl state %d\n",

					ret);

		}

	} else {

		if (gpio_is_valid(gl_ts->pdata->reset_gpio))

			gpio_free(gl_ts->pdata->reset_gpio);

		if (gpio_is_valid(gl_ts->pdata->irq_gpio))

			gpio_free(gl_ts->pdata->irq_gpio);

	}

	IT7260_power_on(false);

	IT7260_regulator_configure(false);