| Message ID | 20200520153936.46869-6-sebastian.reichel@collabora.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | EXC3000 Updates | expand |
Hi Sebastian, On 20/5/20 17:39, Sebastian Reichel wrote: > Add basic support for an optional reset gpio. > > Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> Thanks to address the comments I did in second version. so, Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> > --- > .../input/touchscreen/eeti,exc3000.yaml | 2 ++ > drivers/input/touchscreen/exc3000.c | 17 +++++++++++++++++ > 2 files changed, 19 insertions(+) > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml b/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml > index 7e6e23f8fa00..007adbc89c14 100644 > --- a/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml > +++ b/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml > @@ -22,6 +22,8 @@ properties: > const: 0x2a > interrupts: > maxItems: 1 > + reset-gpios: > + maxItems: 1 > touchscreen-size-x: true > touchscreen-size-y: true > touchscreen-inverted-x: true > diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c > index b5a3bbb63504..de9d0ae1210a 100644 > --- a/drivers/input/touchscreen/exc3000.c > +++ b/drivers/input/touchscreen/exc3000.c > @@ -8,7 +8,9 @@ > */ > > #include <linux/bitops.h> > +#include <linux/delay.h> > #include <linux/device.h> > +#include <linux/gpio/consumer.h> > #include <linux/i2c.h> > #include <linux/input.h> > #include <linux/input/mt.h> > @@ -33,6 +35,9 @@ > > #define EXC3000_TIMEOUT_MS 100 > > +#define EXC3000_RESET_MS 10 > +#define EXC3000_READY_MS 100 > + > static const struct i2c_device_id exc3000_id[]; > > struct eeti_dev_info { > @@ -66,6 +71,7 @@ struct exc3000_data { > const struct eeti_dev_info *info; > struct input_dev *input; > struct touchscreen_properties prop; > + struct gpio_desc *reset; > struct timer_list timer; > u8 buf[2 * EXC3000_LEN_FRAME]; > struct completion wait_event; > @@ -325,6 +331,17 @@ static int exc3000_probe(struct i2c_client *client) > init_completion(&data->wait_event); > mutex_init(&data->query_lock); > > + data->reset = devm_gpiod_get_optional(&client->dev, "reset", > + GPIOD_OUT_HIGH); > + if (IS_ERR(data->reset)) > + return PTR_ERR(data->reset); > + > + if (data->reset) { > + msleep(EXC3000_RESET_MS); > + gpiod_set_value_cansleep(data->reset, 0); > + msleep(EXC3000_READY_MS); > + } > + > input = devm_input_allocate_device(&client->dev); > if (!input) > return -ENOMEM; >
diff --git a/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml b/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml index 7e6e23f8fa00..007adbc89c14 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml @@ -22,6 +22,8 @@ properties: const: 0x2a interrupts: maxItems: 1 + reset-gpios: + maxItems: 1 touchscreen-size-x: true touchscreen-size-y: true touchscreen-inverted-x: true diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c index b5a3bbb63504..de9d0ae1210a 100644 --- a/drivers/input/touchscreen/exc3000.c +++ b/drivers/input/touchscreen/exc3000.c @@ -8,7 +8,9 @@ */ #include <linux/bitops.h> +#include <linux/delay.h> #include <linux/device.h> +#include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/mt.h> @@ -33,6 +35,9 @@ #define EXC3000_TIMEOUT_MS 100 +#define EXC3000_RESET_MS 10 +#define EXC3000_READY_MS 100 + static const struct i2c_device_id exc3000_id[]; struct eeti_dev_info { @@ -66,6 +71,7 @@ struct exc3000_data { const struct eeti_dev_info *info; struct input_dev *input; struct touchscreen_properties prop; + struct gpio_desc *reset; struct timer_list timer; u8 buf[2 * EXC3000_LEN_FRAME]; struct completion wait_event; @@ -325,6 +331,17 @@ static int exc3000_probe(struct i2c_client *client) init_completion(&data->wait_event); mutex_init(&data->query_lock); + data->reset = devm_gpiod_get_optional(&client->dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(data->reset)) + return PTR_ERR(data->reset); + + if (data->reset) { + msleep(EXC3000_RESET_MS); + gpiod_set_value_cansleep(data->reset, 0); + msleep(EXC3000_READY_MS); + } + input = devm_input_allocate_device(&client->dev); if (!input) return -ENOMEM;
Add basic support for an optional reset gpio. Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> --- .../input/touchscreen/eeti,exc3000.yaml | 2 ++ drivers/input/touchscreen/exc3000.c | 17 +++++++++++++++++ 2 files changed, 19 insertions(+)