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drm/omap: panel-dpi: implement support for a vcc regulator 

To allow supporting displays that need some logic to enable power to the
display try to get a vcc-supply property from the device tree and drive
the resulting regulator accordingly.

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Uwe Kleine-König 2016-03-21 22:10:27 +01:00 committed by Tomi Valkeinen
parent e2513b3f56
commit 5379be2912
1 changed files with 13 additions and 0 deletions
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13
drivers/gpu/drm/omapdrm/displays/panel-dpi.c
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@ -15,6 +15,7 @@
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/regulator/consumer.h>
#include <video/omapdss.h>
#include <video/omap-panel-data.h>
@ -32,6 +33,7 @@ struct panel_drv_data {
int backlight_gpio;
struct gpio_desc *enable_gpio;
struct regulator *vcc_supply;
};
#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
@ -83,6 +85,12 @@ static int panel_dpi_enable(struct omap_dss_device *dssdev)
if (r)
return r;
r = regulator_enable(ddata->vcc_supply);
if (r) {
in->ops.dpi->disable(in);
return r;
}
gpiod_set_value_cansleep(ddata->enable_gpio, 1);
if (gpio_is_valid(ddata->backlight_gpio))
@ -105,6 +113,7 @@ static void panel_dpi_disable(struct omap_dss_device *dssdev)
gpio_set_value_cansleep(ddata->backlight_gpio, 0);
gpiod_set_value_cansleep(ddata->enable_gpio, 0);
regulator_disable(ddata->vcc_supply);
in->ops.dpi->disable(in);
@ -223,6 +232,10 @@ static int panel_dpi_probe_of(struct platform_device *pdev)
if (IS_ERR(gpio))
return PTR_ERR(gpio);
ddata->vcc_supply = devm_regulator_get(&pdev->dev, "vcc");
if (IS_ERR(ddata->vcc_supply))
return PTR_ERR(ddata->vcc_supply);
ddata->backlight_gpio = -ENOENT;
r = of_get_display_timing(node, "panel-timing", &timing);