Hi,
On Wed, Jun 06, 2018 at 12:36:35PM +0300, Laurent Pinchart wrote:
> The GPIO descriptor API is favoured over the plain GPIO API for consumer
> drivers. Using it simplifies the driver code.
>
> As the descriptor API handles the active-low flag internally we need to
> invert the polarity of all GPIO operations in the driver.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
-- Sebastian
> drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c | 51 ++++++-----------------
> 1 file changed, 13 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c b/drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c
> index c7398428228f..b91e45c0bfdd 100644
> --- a/drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c
> +++ b/drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c
> @@ -13,14 +13,13 @@
> #include <linux/module.h>
> #include <linux/platform_device.h>
> #include <linux/slab.h>
> -#include <linux/of_gpio.h>
>
> #include "../dss/omapdss.h"
>
> struct panel_drv_data {
> struct omap_dss_device dssdev;
>
> - int pd_gpio;
> + struct gpio_desc *pd_gpio;
>
> struct videomode vm;
> };
> @@ -57,8 +56,8 @@ static int tfp410_enable(struct omap_dss_device *dssdev)
> if (r)
> return r;
>
> - if (gpio_is_valid(ddata->pd_gpio))
> - gpio_set_value_cansleep(ddata->pd_gpio, 1);
> + if (ddata->pd_gpio)
> + gpiod_set_value_cansleep(ddata->pd_gpio, 0);
>
> dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
>
> @@ -73,8 +72,8 @@ static void tfp410_disable(struct omap_dss_device *dssdev)
> if (!omapdss_device_is_enabled(dssdev))
> return;
>
> - if (gpio_is_valid(ddata->pd_gpio))
> - gpio_set_value_cansleep(ddata->pd_gpio, 0);
> + if (ddata->pd_gpio)
> + gpiod_set_value_cansleep(ddata->pd_gpio, 0);
>
> src->ops->disable(src);
>
> @@ -119,30 +118,11 @@ static const struct omap_dss_device_ops tfp410_ops = {
> .set_timings = tfp410_set_timings,
> };
>
> -static int tfp410_probe_of(struct platform_device *pdev)
> -{
> - struct panel_drv_data *ddata = platform_get_drvdata(pdev);
> - struct device_node *node = pdev->dev.of_node;
> - int gpio;
> -
> - gpio = of_get_named_gpio(node, "powerdown-gpios", 0);
> -
> - if (gpio_is_valid(gpio) || gpio == -ENOENT) {
> - ddata->pd_gpio = gpio;
> - } else {
> - if (gpio != -EPROBE_DEFER)
> - dev_err(&pdev->dev, "failed to parse PD gpio\n");
> - return gpio;
> - }
> -
> - return 0;
> -}
> -
> static int tfp410_probe(struct platform_device *pdev)
> {
> struct panel_drv_data *ddata;
> struct omap_dss_device *dssdev;
> - int r;
> + struct gpio_desc *gpio;
>
> ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
> if (!ddata)
> @@ -150,20 +130,15 @@ static int tfp410_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, ddata);
>
> - r = tfp410_probe_of(pdev);
> - if (r)
> - return r;
> -
> - if (gpio_is_valid(ddata->pd_gpio)) {
> - r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,
> - GPIOF_OUT_INIT_LOW, "tfp410 PD");
> - if (r) {
> - dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
> - ddata->pd_gpio);
> - return r;
> - }
> + /* Powerdown GPIO */
> + gpio = devm_gpiod_get_optional(&pdev->dev, "powerdown", GPIOD_OUT_HIGH);
> + if (IS_ERR(gpio)) {
> + dev_err(&pdev->dev, "failed to parse powerdown gpio\n");
> + return PTR_ERR(gpio);
> }
>
> + ddata->pd_gpio = gpio;
> +
> dssdev = &ddata->dssdev;
> dssdev->ops = &tfp410_ops;
> dssdev->dev = &pdev->dev;
> --
> Regards,
>
> Laurent Pinchart
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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