Calling request_gpio to register bklt_gpio with the GPIO driver had no effect in setup_display called from early board init (although pinmuxing it and configuring it as output-low does do what it should). Therefore move the request_gpio later in enable_lvds so that its registered for use by the gpio command if LVDS is actually enabled.
Signed-off-by: Tim Harvey tharvey@gateworks.com --- board/gateworks/gw_ventana/gw_ventana.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/board/gateworks/gw_ventana/gw_ventana.c b/board/gateworks/gw_ventana/gw_ventana.c index 3b7c82b..7a3d96a 100644 --- a/board/gateworks/gw_ventana/gw_ventana.c +++ b/board/gateworks/gw_ventana/gw_ventana.c @@ -317,6 +317,8 @@ static void enable_lvds(struct display_info_t const *dev) writel(reg, &iomux->gpr[2]);
/* Enable Backlight */ + gpio_request(IMX_GPIO_NR(1, 10), "bklt_gpio"); + gpio_direction_output(IMX_GPIO_NR(1, 10), 0); gpio_request(IMX_GPIO_NR(1, 18), "bklt_en"); SETUP_IOMUX_PAD(PAD_SD1_CMD__GPIO1_IO18 | DIO_PAD_CFG); gpio_direction_output(IMX_GPIO_NR(1, 18), 1); @@ -456,8 +458,7 @@ static void setup_display(void) <<IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET); writel(reg, &iomux->gpr[3]);
- /* Backlight CABEN on LVDS connector */ - gpio_request(IMX_GPIO_NR(1, 10), "bklt_gpio"); + /* LVDS Backlight GPIO on LVDS connector - output low */ SETUP_IOMUX_PAD(PAD_SD2_CLK__GPIO1_IO10 | DIO_PAD_CFG); gpio_direction_output(IMX_GPIO_NR(1, 10), 0); }