| Message ID | 1448207853-24256-1-git-send-email-hdegoede@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Sun, Nov 22, 2015 at 04:57:33PM +0100, Hans de Goede wrote: > From: Sander Vermin <sander@vermin.nl> > > 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@vermin.nl> > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > 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 > Changes in v3 (Hans de Goede): > -Use "if (ts->gpio_foo)" instead of "if (!IS_ERR_OR_NULL(ts->foo))" > -No need to set gpio-s to 1 after requesting them with GPIOD_OUT_HIGH > --- > .../bindings/input/touchscreen/pixcir_i2c_ts.txt | 2 ++ For the binding: Acked-by: Rob Herring <robh@kernel.org> > drivers/input/touchscreen/pixcir_i2c_ts.c | 40 ++++++++++++++++++++++ > 2 files changed, 42 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..22a67c6 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 (ts->gpio_wake) > + gpiod_set_value_cansleep(ts->gpio_wake, 1); > + } > + > ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE); > if (ret < 0) { > dev_err(dev, "%s: can't read reg 0x%x : %d\n", > @@ -228,6 +235,11 @@ static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts, > return ret; > } > > + if (mode == PIXCIR_POWER_HALT) { > + if (ts->gpio_wake) > + gpiod_set_value_cansleep(ts->gpio_wake, 0); > + } > + > return 0; > } > > @@ -302,6 +314,11 @@ static int pixcir_start(struct pixcir_i2c_ts_data *ts) > struct device *dev = &ts->client->dev; > int error; > > + if (ts->gpio_enable) { > + gpiod_set_value_cansleep(ts->gpio_enable, 1); > + msleep(100); > + } > + > /* LEVEL_TOUCH interrupt with active low polarity */ > error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0); > if (error) { > @@ -343,6 +360,9 @@ static int pixcir_stop(struct pixcir_i2c_ts_data *ts) > /* Wait till running ISR is complete */ > synchronize_irq(ts->client->irq); > > + if (ts->gpio_enable) > + gpiod_set_value_cansleep(ts->gpio_enable, 0); > + > return 0; > } > > @@ -534,6 +554,26 @@ static int pixcir_i2c_ts_probe(struct i2c_client *client, > return error; > } > > + tsdata->gpio_wake = devm_gpiod_get_optional(dev, "wake", > + GPIOD_OUT_HIGH); > + if (IS_ERR(tsdata->gpio_wake)) { > + error = PTR_ERR(tsdata->gpio_wake); > + if (error != -EPROBE_DEFER) > + dev_err(dev, "Failed to get wake gpio: %d\n", error); > + return error; > + } > + > + tsdata->gpio_enable = devm_gpiod_get_optional(dev, "enable", > + GPIOD_OUT_HIGH); > + if (IS_ERR(tsdata->gpio_enable)) { > + error = PTR_ERR(tsdata->gpio_enable); > + if (error != -EPROBE_DEFER) > + dev_err(dev, "Failed to get enable gpio: %d\n", error); > + return error; > + } > + if (tsdata->gpio_enable) > + msleep(100); > + > error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr, > IRQF_TRIGGER_FALLING | IRQF_ONESHOT, > client->name, tsdata); > -- > 2.5.0 > > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
On Sun, Nov 22, 2015 at 04:19:50PM -0600, Rob Herring wrote: > On Sun, Nov 22, 2015 at 04:57:33PM +0100, Hans de Goede wrote: > > From: Sander Vermin <sander@vermin.nl> > > > > 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@vermin.nl> > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > > --- > > 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 > > Changes in v3 (Hans de Goede): > > -Use "if (ts->gpio_foo)" instead of "if (!IS_ERR_OR_NULL(ts->foo))" > > -No need to set gpio-s to 1 after requesting them with GPIOD_OUT_HIGH > > --- > > .../bindings/input/touchscreen/pixcir_i2c_ts.txt | 2 ++ > > For the binding: > > Acked-by: Rob Herring <robh@kernel.org> Applied, thank you. > > > drivers/input/touchscreen/pixcir_i2c_ts.c | 40 ++++++++++++++++++++++ > > 2 files changed, 42 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..22a67c6 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 (ts->gpio_wake) > > + gpiod_set_value_cansleep(ts->gpio_wake, 1); > > + } > > + > > ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE); > > if (ret < 0) { > > dev_err(dev, "%s: can't read reg 0x%x : %d\n", > > @@ -228,6 +235,11 @@ static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts, > > return ret; > > } > > > > + if (mode == PIXCIR_POWER_HALT) { > > + if (ts->gpio_wake) > > + gpiod_set_value_cansleep(ts->gpio_wake, 0); > > + } > > + > > return 0; > > } > > > > @@ -302,6 +314,11 @@ static int pixcir_start(struct pixcir_i2c_ts_data *ts) > > struct device *dev = &ts->client->dev; > > int error; > > > > + if (ts->gpio_enable) { > > + gpiod_set_value_cansleep(ts->gpio_enable, 1); > > + msleep(100); > > + } > > + > > /* LEVEL_TOUCH interrupt with active low polarity */ > > error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0); > > if (error) { > > @@ -343,6 +360,9 @@ static int pixcir_stop(struct pixcir_i2c_ts_data *ts) > > /* Wait till running ISR is complete */ > > synchronize_irq(ts->client->irq); > > > > + if (ts->gpio_enable) > > + gpiod_set_value_cansleep(ts->gpio_enable, 0); > > + > > return 0; > > } > > > > @@ -534,6 +554,26 @@ static int pixcir_i2c_ts_probe(struct i2c_client *client, > > return error; > > } > > > > + tsdata->gpio_wake = devm_gpiod_get_optional(dev, "wake", > > + GPIOD_OUT_HIGH); > > + if (IS_ERR(tsdata->gpio_wake)) { > > + error = PTR_ERR(tsdata->gpio_wake); > > + if (error != -EPROBE_DEFER) > > + dev_err(dev, "Failed to get wake gpio: %d\n", error); > > + return error; > > + } > > + > > + tsdata->gpio_enable = devm_gpiod_get_optional(dev, "enable", > > + GPIOD_OUT_HIGH); > > + if (IS_ERR(tsdata->gpio_enable)) { > > + error = PTR_ERR(tsdata->gpio_enable); > > + if (error != -EPROBE_DEFER) > > + dev_err(dev, "Failed to get enable gpio: %d\n", error); > > + return error; > > + } > > + if (tsdata->gpio_enable) > > + msleep(100); > > + > > error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr, > > IRQF_TRIGGER_FALLING | IRQF_ONESHOT, > > client->name, tsdata); > > -- > > 2.5.0 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe devicetree" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html
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..22a67c6 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 (ts->gpio_wake) + gpiod_set_value_cansleep(ts->gpio_wake, 1); + } + ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE); if (ret < 0) { dev_err(dev, "%s: can't read reg 0x%x : %d\n", @@ -228,6 +235,11 @@ static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts, return ret; } + if (mode == PIXCIR_POWER_HALT) { + if (ts->gpio_wake) + gpiod_set_value_cansleep(ts->gpio_wake, 0); + } + return 0; } @@ -302,6 +314,11 @@ static int pixcir_start(struct pixcir_i2c_ts_data *ts) struct device *dev = &ts->client->dev; int error; + if (ts->gpio_enable) { + gpiod_set_value_cansleep(ts->gpio_enable, 1); + msleep(100); + } + /* LEVEL_TOUCH interrupt with active low polarity */ error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0); if (error) { @@ -343,6 +360,9 @@ static int pixcir_stop(struct pixcir_i2c_ts_data *ts) /* Wait till running ISR is complete */ synchronize_irq(ts->client->irq); + if (ts->gpio_enable) + gpiod_set_value_cansleep(ts->gpio_enable, 0); + return 0; } @@ -534,6 +554,26 @@ static int pixcir_i2c_ts_probe(struct i2c_client *client, return error; } + tsdata->gpio_wake = devm_gpiod_get_optional(dev, "wake", + GPIOD_OUT_HIGH); + if (IS_ERR(tsdata->gpio_wake)) { + error = PTR_ERR(tsdata->gpio_wake); + if (error != -EPROBE_DEFER) + dev_err(dev, "Failed to get wake gpio: %d\n", error); + return error; + } + + tsdata->gpio_enable = devm_gpiod_get_optional(dev, "enable", + GPIOD_OUT_HIGH); + if (IS_ERR(tsdata->gpio_enable)) { + error = PTR_ERR(tsdata->gpio_enable); + if (error != -EPROBE_DEFER) + dev_err(dev, "Failed to get enable gpio: %d\n", error); + return error; + } + if (tsdata->gpio_enable) + msleep(100); + error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, client->name, tsdata);