Add support for the optional power-supply.
Note: A "dummy regulator" is returned by devm_regulator_get() if the optional regulator is not present in the device tree, simplifying the source code when enabling/disabling the regulator.
Signed-off-by: Philippe Cornu philippe.cornu@st.com --- drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c index 72530983d55d..90f1ae4af93c 100644 --- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c +++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c @@ -11,6 +11,7 @@ #include <drm/drm_panel.h> #include <linux/backlight.h> #include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> #include <video/mipi_display.h>
#define DRV_NAME "orisetech_otm8009a" @@ -62,6 +63,7 @@ struct otm8009a { struct drm_panel panel; struct backlight_device *bl_dev; struct gpio_desc *reset_gpio; + struct regulator *supply; bool prepared; bool enabled; }; @@ -279,6 +281,8 @@ static int otm8009a_unprepare(struct drm_panel *panel) msleep(20); }
+ regulator_disable(ctx->supply); + ctx->prepared = false;
return 0; @@ -292,6 +296,12 @@ static int otm8009a_prepare(struct drm_panel *panel) if (ctx->prepared) return 0;
+ ret = regulator_enable(ctx->supply); + if (ret < 0) { + DRM_ERROR("failed to enable supply: %d\n", ret); + return ret; + } + if (ctx->reset_gpio) { gpiod_set_value_cansleep(ctx->reset_gpio, 0); gpiod_set_value_cansleep(ctx->reset_gpio, 1); @@ -414,6 +424,13 @@ static int otm8009a_probe(struct mipi_dsi_device *dsi) return PTR_ERR(ctx->reset_gpio); }
+ ctx->supply = devm_regulator_get(dev, "power"); + if (IS_ERR(ctx->supply)) { + ret = PTR_ERR(ctx->supply); + dev_err(dev, "failed to request regulator: %d\n", ret); + return ret; + } + mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;