diff options
| author | Biju Das <biju.das.jz@bp.renesas.com> | 2020-08-10 18:22:18 +0300 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2020-09-22 14:10:01 +0300 |
| commit | 946a61ab2d758cc645f6e63f1a5e2731690c3943 (patch) | |
| tree | 1fe749ec3057dc11fc771888f0871f4b883b3deb /drivers/gpu/drm/bridge | |
| parent | 2cd9df2be75766452fef87c37ec37d91f4cbaf6b (diff) | |
| download | linux-946a61ab2d758cc645f6e63f1a5e2731690c3943.tar.xz | |
drm/bridge: lvds-codec: Add support for regulator
Add the support for enabling optional regulator that may be used as VCC
source.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[Replaced 'error' variable with 'ret']
[Renamed regulator from 'vcc' to 'power']
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Diffstat (limited to 'drivers/gpu/drm/bridge')
| -rw-r--r-- | drivers/gpu/drm/bridge/lvds-codec.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c index f19d9f7a5db2..f52ccffc1bd1 100644 --- a/drivers/gpu/drm/bridge/lvds-codec.c +++ b/drivers/gpu/drm/bridge/lvds-codec.c @@ -10,13 +10,16 @@ #include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/platform_device.h> +#include <linux/regulator/consumer.h> #include <drm/drm_bridge.h> #include <drm/drm_panel.h> struct lvds_codec { + struct device *dev; struct drm_bridge bridge; struct drm_bridge *panel_bridge; + struct regulator *vcc; struct gpio_desc *powerdown_gpio; u32 connector_type; }; @@ -38,6 +41,14 @@ static int lvds_codec_attach(struct drm_bridge *bridge, static void lvds_codec_enable(struct drm_bridge *bridge) { struct lvds_codec *lvds_codec = to_lvds_codec(bridge); + int ret; + + ret = regulator_enable(lvds_codec->vcc); + if (ret) { + dev_err(lvds_codec->dev, + "Failed to enable regulator \"vcc\": %d\n", ret); + return; + } if (lvds_codec->powerdown_gpio) gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 0); @@ -46,9 +57,15 @@ static void lvds_codec_enable(struct drm_bridge *bridge) static void lvds_codec_disable(struct drm_bridge *bridge) { struct lvds_codec *lvds_codec = to_lvds_codec(bridge); + int ret; if (lvds_codec->powerdown_gpio) gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 1); + + ret = regulator_disable(lvds_codec->vcc); + if (ret) + dev_err(lvds_codec->dev, + "Failed to disable regulator \"vcc\": %d\n", ret); } static const struct drm_bridge_funcs funcs = { @@ -63,12 +80,24 @@ static int lvds_codec_probe(struct platform_device *pdev) struct device_node *panel_node; struct drm_panel *panel; struct lvds_codec *lvds_codec; + int ret; lvds_codec = devm_kzalloc(dev, sizeof(*lvds_codec), GFP_KERNEL); if (!lvds_codec) return -ENOMEM; + lvds_codec->dev = &pdev->dev; lvds_codec->connector_type = (uintptr_t)of_device_get_match_data(dev); + + lvds_codec->vcc = devm_regulator_get(lvds_codec->dev, "power"); + if (IS_ERR(lvds_codec->vcc)) { + ret = PTR_ERR(lvds_codec->vcc); + if (ret != -EPROBE_DEFER) + dev_err(lvds_codec->dev, + "Unable to get \"vcc\" supply: %d\n", ret); + return ret; + } + lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH); if (IS_ERR(lvds_codec->powerdown_gpio)) |