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author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2011-12-22 10:37:33 +0200 |
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committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2012-05-09 10:51:04 +0300 |
commit | 2da35193dc81b574001a47347f41c4922b1266d3 (patch) | |
tree | b9816c8b8fba317eae9bfdb6ff9fb31387a4e052 /drivers/video | |
parent | 66f75a5d028beaf67c931435fdc3e7823125730c (diff) | |
download | linux-stable-2da35193dc81b574001a47347f41c4922b1266d3.tar.gz linux-stable-2da35193dc81b574001a47347f41c4922b1266d3.tar.bz2 linux-stable-2da35193dc81b574001a47347f41c4922b1266d3.zip |
OMAPDSS: panel-dvi: add PD gpio handling
The driver for the TFP410 chip should handle the power-down signal of
the chip, instead of the current way of handling it in the board files.
This patch adds power_down_gpio into the device's platform data, and
adds the necessary code in the driver to request and handle the GPIO.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video')
-rw-r--r-- | drivers/video/omap2/displays/panel-dvi.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/video/omap2/displays/panel-dvi.c b/drivers/video/omap2/displays/panel-dvi.c index 03eb14af33e0..876b7989ecb4 100644 --- a/drivers/video/omap2/displays/panel-dvi.c +++ b/drivers/video/omap2/displays/panel-dvi.c @@ -21,6 +21,7 @@ #include <linux/slab.h> #include <video/omapdss.h> #include <linux/i2c.h> +#include <linux/gpio.h> #include <drm/drm_edid.h> #include <video/omap-panel-dvi.h> @@ -44,6 +45,8 @@ struct panel_drv_data { struct omap_dss_device *dssdev; struct mutex lock; + + int pd_gpio; }; static inline struct panel_dvi_platform_data @@ -54,6 +57,7 @@ static inline struct panel_dvi_platform_data static int panel_dvi_power_on(struct omap_dss_device *dssdev) { + struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev); struct panel_dvi_platform_data *pdata = get_pdata(dssdev); int r; @@ -70,6 +74,9 @@ static int panel_dvi_power_on(struct omap_dss_device *dssdev) goto err1; } + if (gpio_is_valid(ddata->pd_gpio)) + gpio_set_value(ddata->pd_gpio, 1); + return 0; err1: omapdss_dpi_display_disable(dssdev); @@ -79,11 +86,15 @@ err0: static void panel_dvi_power_off(struct omap_dss_device *dssdev) { + struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev); struct panel_dvi_platform_data *pdata = get_pdata(dssdev); if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) return; + if (gpio_is_valid(ddata->pd_gpio)) + gpio_set_value(ddata->pd_gpio, 0); + if (pdata->platform_disable) pdata->platform_disable(dssdev); @@ -92,7 +103,9 @@ static void panel_dvi_power_off(struct omap_dss_device *dssdev) static int panel_dvi_probe(struct omap_dss_device *dssdev) { + struct panel_dvi_platform_data *pdata = get_pdata(dssdev); struct panel_drv_data *ddata; + int r; ddata = kzalloc(sizeof(*ddata), GFP_KERNEL); if (!ddata) @@ -104,6 +117,21 @@ static int panel_dvi_probe(struct omap_dss_device *dssdev) ddata->dssdev = dssdev; mutex_init(&ddata->lock); + if (pdata) + ddata->pd_gpio = pdata->power_down_gpio; + else + ddata->pd_gpio = -1; + + if (gpio_is_valid(ddata->pd_gpio)) { + r = gpio_request_one(ddata->pd_gpio, GPIOF_OUT_INIT_LOW, + "tfp410 pd"); + if (r) { + dev_err(&dssdev->dev, "Failed to request PD GPIO %d\n", + ddata->pd_gpio); + ddata->pd_gpio = -1; + } + } + dev_set_drvdata(&dssdev->dev, ddata); return 0; @@ -115,6 +143,9 @@ static void __exit panel_dvi_remove(struct omap_dss_device *dssdev) mutex_lock(&ddata->lock); + if (gpio_is_valid(ddata->pd_gpio)) + gpio_free(ddata->pd_gpio); + dev_set_drvdata(&dssdev->dev, NULL); mutex_unlock(&ddata->lock); |