Hi, On 20-11-15 18:27, Dmitry Torokhov wrote:
On Fri, Nov 20, 2015 at 12:17:10PM +0100, Hans de Goede wrote:From: Sander Vermin <sander@xxxxxxxxx> On some devices the wake and enable pins of the pixcir touchscreen controller are connected to gpios and these must be controlled by the driver for the device to operate properly. Signed-off-by: Sander Vermin <sander@xxxxxxxxx> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- Changes in v2 (Hans de Goede): -Split the changes for dealing with inverted / swapped axis out into a separate patch -Remove a bunch of dev_info calls to make the driver less chatty -Use devm_gpiod_get_optional as these new gpios are optional -Only msleep after setting enable high if we have an enable pin --- .../bindings/input/touchscreen/pixcir_i2c_ts.txt | 2 + drivers/input/touchscreen/pixcir_i2c_ts.c | 46 ++++++++++++++++++++++ 2 files changed, 48 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/pixcir_i2c_ts.txt b/Documentation/devicetree/bindings/input/touchscreen/pixcir_i2c_ts.txt index 8eb240a..72ca5ec 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/pixcir_i2c_ts.txt +++ b/Documentation/devicetree/bindings/input/touchscreen/pixcir_i2c_ts.txt @@ -10,6 +10,8 @@ Required properties: Optional properties: - reset-gpio: GPIO connected to the RESET line of the chip +- enable-gpios: GPIO connected to the ENABLE line of the chip +- wake-gpios: GPIO connected to the WAKE line of the chip Example: diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.c b/drivers/input/touchscreen/pixcir_i2c_ts.c index 211408c..b75ef65 100644 --- a/drivers/input/touchscreen/pixcir_i2c_ts.c +++ b/drivers/input/touchscreen/pixcir_i2c_ts.c @@ -38,6 +38,8 @@ struct pixcir_i2c_ts_data { struct input_dev *input; struct gpio_desc *gpio_attb; struct gpio_desc *gpio_reset; + struct gpio_desc *gpio_enable; + struct gpio_desc *gpio_wake; const struct pixcir_i2c_chip_data *chip; int max_fingers; /* Max fingers supported in this instance */ bool running; @@ -208,6 +210,11 @@ static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts, struct device *dev = &ts->client->dev; int ret; + if (mode == PIXCIR_POWER_ACTIVE || mode == PIXCIR_POWER_IDLE) { + if (!IS_ERR_OR_NULL(ts->gpio_wake)) + gpiod_set_value_cansleep(ts->gpio_wake, 1);I believe you error out in case when IS_ERR(ts->gpio_wake) is true, so I wonder if we should simply use if (ts->gpio_wake) gpiod_set_value_cansleep(ts->gpio_wake, 1); here and elsewhere.
Yes that will work fine, I believe Sander went with his version because that is what the existing gpio code (for the also optional reset pin) already does. So from a consistency pov it is better to keep this patch as is.
No need to resubmit, just let me know.
Ok, either way is fine with me. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
