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| author | Marco Franchi <marco.franchi@nxp.com> | 2016-06-08 15:05:31 -0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-06-18 10:25:54 +0200 |
| commit | 6c51a3644e233bce171c19cec9cec77a77beada7 (patch) | |
| tree | edb238ffb3b996859cd77cdefc8521a001ada5ae /board | |
| parent | dc557e9a1fe00ca9d884bd88feef5bebf23fede4 (diff) | |
| download | talos-obmc-uboot-6c51a3644e233bce171c19cec9cec77a77beada7.tar.gz talos-obmc-uboot-6c51a3644e233bce171c19cec9cec77a77beada7.zip | |
mx6sabresd: Allow LVDS backlight to be functional after a kernel reboot
Currently the LVDS backlight does not work in U-Boot after a “reboot” comand
in the kernel.
This problem occurs because the kernel uses this pin in PWM mode and U-Boot
does not configure the backlight pin as GPIO functionality.
So fix the problem by explicitly configuring the backlight pin as GPIO in
U-Boot.
Signed-off-by: Marco Franchi <marco.franchi@nxp.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
Diffstat (limited to 'board')
| -rw-r--r-- | board/freescale/mx6sabresd/mx6sabresd.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c index 54ba36b535..0cf68097f4 100644 --- a/board/freescale/mx6sabresd/mx6sabresd.c +++ b/board/freescale/mx6sabresd/mx6sabresd.c @@ -177,13 +177,27 @@ static iomux_v3_cfg_t const rgb_pads[] = { MX6_PAD_DISP0_DAT21__IPU1_DISP0_DATA21 | MUX_PAD_CTRL(NO_PAD_CTRL), MX6_PAD_DISP0_DAT22__IPU1_DISP0_DATA22 | MUX_PAD_CTRL(NO_PAD_CTRL), MX6_PAD_DISP0_DAT23__IPU1_DISP0_DATA23 | MUX_PAD_CTRL(NO_PAD_CTRL), +}; + +static iomux_v3_cfg_t const bl_pads[] = { MX6_PAD_SD1_DAT3__GPIO1_IO21 | MUX_PAD_CTRL(NO_PAD_CTRL), }; +static void enable_backlight(void) +{ + imx_iomux_v3_setup_multiple_pads(bl_pads, ARRAY_SIZE(bl_pads)); + gpio_direction_output(DISP0_PWR_EN, 1); +} + static void enable_rgb(struct display_info_t const *dev) { imx_iomux_v3_setup_multiple_pads(rgb_pads, ARRAY_SIZE(rgb_pads)); - gpio_direction_output(DISP0_PWR_EN, 1); + enable_backlight(); +} + +static void enable_lvds(struct display_info_t const *dev) +{ + enable_backlight(); } static struct i2c_pads_info i2c_pad_info1 = { @@ -370,7 +384,7 @@ struct display_info_t const displays[] = {{ .addr = 0, .pixfmt = IPU_PIX_FMT_RGB666, .detect = NULL, - .enable = NULL, + .enable = enable_lvds, .mode = { .name = "Hannstar-XGA", .refresh = 60, |
