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Input: tsc2005 - convert to gpiod 

The GPIOD API can be used from boardcode, so that the DT check can be
removed. To avoid breaking existing boardcode, _optional() variant has been
chosen. For completely removing the DT check, the regulator has also been
made optional, so that it could be supplied from boardcode.

As a side-effect the patch fixes the after-probe reset GPIO state, so that
the device is not kept in reset state.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Sebastian Reichel 2015-07-27 17:28:58 -07:00 committed by Dmitry Torokhov
parent 80b46aa69e
commit d257f2980f
1 changed files with 20 additions and 31 deletions
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51
drivers/input/touchscreen/tsc2005.c
View File

@ -30,11 +30,11 @@
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/spi/spi.h>
#include <linux/spi/tsc2005.h>
#include <linux/regulator/consumer.h>
#include <linux/regmap.h>
#include <linux/gpio/consumer.h>
/*
* The touchscreen interface operates as follows:
@ -180,7 +180,7 @@ struct tsc2005 {
struct regulator *vio;
int reset_gpio;
struct gpio_desc *reset_gpio;
void (*set_reset)(bool enable);
};
@ -318,8 +318,8 @@ static void tsc2005_stop_scan(struct tsc2005 *ts)
static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
{
if (ts->reset_gpio >= 0)
gpio_set_value(ts->reset_gpio, enable);
if (ts->reset_gpio)
gpiod_set_value_cansleep(ts->reset_gpio, enable);
else if (ts->set_reset)
ts->set_reset(enable);
}
@ -611,35 +611,24 @@ static int tsc2005_probe(struct spi_device *spi)
ts->x_plate_ohm = x_plate_ohm;
ts->esd_timeout = esd_timeout;
if (np) {
ts->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
if (ts->reset_gpio == -EPROBE_DEFER)
return ts->reset_gpio;
if (ts->reset_gpio < 0) {
dev_err(&spi->dev, "error acquiring reset gpio: %d\n",
ts->reset_gpio);
return ts->reset_gpio;
}
error = devm_gpio_request_one(&spi->dev, ts->reset_gpio, 0,
"reset-gpios");
if (error) {
dev_err(&spi->dev, "error requesting reset gpio: %d\n",
error);
return error;
}
ts->vio = devm_regulator_get(&spi->dev, "vio");
if (IS_ERR(ts->vio)) {
error = PTR_ERR(ts->vio);
dev_err(&spi->dev, "vio regulator missing (%d)", error);
return error;
}
} else {
ts->reset_gpio = -1;
ts->set_reset = pdata->set_reset;
ts->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(ts->reset_gpio)) {
error = PTR_ERR(ts->reset_gpio);
dev_err(&spi->dev, "error acquiring reset gpio: %d\n", error);
return error;
}
ts->vio = devm_regulator_get_optional(&spi->dev, "vio");
if (IS_ERR(ts->vio)) {
error = PTR_ERR(ts->vio);
dev_err(&spi->dev, "vio regulator missing (%d)", error);
return error;
}
if (!ts->reset_gpio && pdata)
ts->set_reset = pdata->set_reset;
mutex_init(&ts->mutex);
spin_lock_init(&ts->lock);