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drm/bridge: add psave gpio control for dumb-vga-dac

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Change-Id: If2c5402d842e13df4baf2d608718e0597f5d4ff7
Signed-off-by: Jerry Xu <xbl@rock-chips.com>
This commit is contained in:
Jerry Xu 2018-01-23 16:06:36 +08:00 committed by Tao Huang
parent 1a0b9345e8
commit 751b94a7e9
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/drm/bridge/dumb-vga-dac.c
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@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <drm/drmP.h>
@ -25,6 +26,7 @@ struct dumb_vga {
struct i2c_adapter *ddc;
struct regulator *vdd;
struct gpio_desc *psave_gpio;
};
static inline struct dumb_vga *
@ -136,12 +138,18 @@ static void dumb_vga_enable(struct drm_bridge *bridge)
if (ret)
DRM_ERROR("Failed to enable vdd regulator: %d\n", ret);
if (vga->psave_gpio)
gpiod_direction_output(vga->psave_gpio, 1);
}
static void dumb_vga_disable(struct drm_bridge *bridge)
{
struct dumb_vga *vga = drm_bridge_to_dumb_vga(bridge);
if (vga->psave_gpio)
gpiod_direction_output(vga->psave_gpio, 0);
if (vga->vdd)
regulator_disable(vga->vdd);
}
@ -177,6 +185,7 @@ static struct i2c_adapter *dumb_vga_retrieve_ddc(struct device *dev)
static int dumb_vga_probe(struct platform_device *pdev)
{
struct dumb_vga *vga;
int err;
vga = devm_kzalloc(&pdev->dev, sizeof(*vga), GFP_KERNEL);
if (!vga)
@ -192,6 +201,13 @@ static int dumb_vga_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "No vdd regulator found: %d\n", ret);
}
vga->psave_gpio = devm_gpiod_get_optional(&pdev->dev, "psave", 0);
if (IS_ERR(vga->psave_gpio)) {
err = PTR_ERR(vga->psave_gpio);
dev_err(&pdev->dev, "failed to get psave GPIO: %d\n", err);
return err;
}
vga->ddc = dumb_vga_retrieve_ddc(&pdev->dev);
if (IS_ERR(vga->ddc)) {
if (PTR_ERR(vga->ddc) == -ENODEV) {