[PATCH 08/21] drm/omap: panel-sony-acx565akm: Convert to the GPIO descriptors API

[Sebastian Reichel]

Hi,

On Wed, Jun 06, 2018 at 12:36:37PM +0300, Laurent Pinchart wrote:
> The GPIO descriptor API is favoured over the plain GPIO API for consumer
> drivers. Using it simplifies the driver code.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> ---

Reviewed-by: Sebastian Reichel <sebastian.reichel at collabora.co.uk>

-- Sebastian

>  .../drm/omapdrm/displays/panel-sony-acx565akm.c    | 56 ++++++++--------------
>  1 file changed, 21 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c b/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c
> index c501a06207af..f5f3e5e5f3dc 100644
> --- a/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c
> +++ b/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c
> @@ -20,17 +20,15 @@
>   * this program.  If not, see <http://www.gnu.org/licenses/>.
>   */
>  
> +#include <linux/backlight.h>
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/jiffies.h>
>  #include <linux/kernel.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
> -#include <linux/delay.h>
> -#include <linux/spi/spi.h>
> -#include <linux/jiffies.h>
>  #include <linux/sched.h>
> -#include <linux/backlight.h>
> -#include <linux/gpio/consumer.h>
> -#include <linux/of.h>
> -#include <linux/of_gpio.h>
> +#include <linux/spi/spi.h>
>  
>  #include "../dss/omapdss.h"
>  
> @@ -65,7 +63,7 @@
>  struct panel_drv_data {
>  	struct omap_dss_device	dssdev;
>  
> -	int reset_gpio;
> +	struct gpio_desc *reset_gpio;
>  
>  	struct videomode vm;
>  
> @@ -536,8 +534,8 @@ static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
>  	/*FIXME tweak me */
>  	msleep(50);
>  
> -	if (gpio_is_valid(ddata->reset_gpio))
> -		gpio_set_value(ddata->reset_gpio, 1);
> +	if (ddata->reset_gpio)
> +		gpiod_set_value(ddata->reset_gpio, 1);
>  
>  	if (ddata->enabled) {
>  		dev_dbg(&ddata->spi->dev, "panel already enabled\n");
> @@ -586,8 +584,8 @@ static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
>  	 */
>  	msleep(50);
>  
> -	if (gpio_is_valid(ddata->reset_gpio))
> -		gpio_set_value(ddata->reset_gpio, 0);
> +	if (ddata->reset_gpio)
> +		gpiod_set_value(ddata->reset_gpio, 0);
>  
>  	/* FIXME need to tweak this delay */
>  	msleep(100);
> @@ -674,16 +672,6 @@ static const struct omap_dss_driver acx565akm_ops = {
>  	.check_timings	= acx565akm_check_timings,
>  };
>  
> -static int acx565akm_probe_of(struct spi_device *spi)
> -{
> -	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
> -	struct device_node *np = spi->dev.of_node;
> -
> -	ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
> -
> -	return 0;
> -}
> -
>  static int acx565akm_probe(struct spi_device *spi)
>  {
>  	struct panel_drv_data *ddata;
> @@ -691,6 +679,7 @@ static int acx565akm_probe(struct spi_device *spi)
>  	struct backlight_device *bldev;
>  	int max_brightness, brightness;
>  	struct backlight_properties props;
> +	struct gpio_desc *gpio;
>  	int r;
>  
>  	dev_dbg(&spi->dev, "%s\n", __func__);
> @@ -707,19 +696,16 @@ static int acx565akm_probe(struct spi_device *spi)
>  
>  	mutex_init(&ddata->mutex);
>  
> -	r = acx565akm_probe_of(spi);
> -	if (r)
> -		return r;
> -
> -	if (gpio_is_valid(ddata->reset_gpio)) {
> -		r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
> -				GPIOF_OUT_INIT_LOW, "lcd reset");
> -		if (r)
> -			return r;
> +	gpio = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW);
> +	if (IS_ERR(gpio)) {
> +		dev_err(&spi->dev, "failed to parse reset gpio\n");
> +		return PTR_ERR(gpio);
>  	}
>  
> -	if (gpio_is_valid(ddata->reset_gpio))
> -		gpio_set_value(ddata->reset_gpio, 1);
> +	ddata->reset_gpio = gpio;
> +
> +	if (ddata->reset_gpio)
> +		gpiod_set_value(ddata->reset_gpio, 1);
>  
>  	/*
>  	 * After reset we have to wait 5 msec before the first
> @@ -731,8 +717,8 @@ static int acx565akm_probe(struct spi_device *spi)
>  
>  	r = panel_detect(ddata);
>  
> -	if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
> -		gpio_set_value(ddata->reset_gpio, 0);
> +	if (!ddata->enabled && ddata->reset_gpio)
> +		gpiod_set_value(ddata->reset_gpio, 0);
>  
>  	if (r) {
>  		dev_err(&spi->dev, "%s panel detect error\n", __func__);
> -- 
> Regards,
> 
> Laurent Pinchart
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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