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nitrogen6x: power-down miscellanous peripherals

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Ensure that cameras and USB OTG power are in a stable (reset)
state at reset by configuring their pads and toggling GPIOs.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
This commit is contained in:
Eric Nelson 2014-10-02 12:16:25 -07:00 committed by Stefano Babic
parent 41612472b6
commit a3b527a947
1 changed files with 43 additions and 4 deletions
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47
board/boundary/nitrogen6x/nitrogen6x.c
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@ -622,17 +622,56 @@ static void setup_display(void)
}
#endif
/* wl1271 pads on nitrogen6x */
static iomux_v3_cfg_t const init_pads[] = {
/* WL12XX_WL_IRQ_GP */
NEW_PAD_CTRL(MX6_PAD_NANDF_CS1__GPIO6_IO14, WEAK_PULLDOWN),
/* WL12XX_WL_ENABLE_GP */
NEW_PAD_CTRL(MX6_PAD_NANDF_CS2__GPIO6_IO15, OUTPUT_40OHM),
/* WL12XX_BT_ENABLE_GP */
NEW_PAD_CTRL(MX6_PAD_NANDF_CS3__GPIO6_IO16, OUTPUT_40OHM),
/* USB otg power */
NEW_PAD_CTRL(MX6_PAD_EIM_D22__GPIO3_IO22, OUTPUT_40OHM),
NEW_PAD_CTRL(MX6_PAD_NANDF_D5__GPIO2_IO05, OUTPUT_40OHM),
NEW_PAD_CTRL(MX6_PAD_NANDF_WP_B__GPIO6_IO09, OUTPUT_40OHM),
NEW_PAD_CTRL(MX6_PAD_GPIO_8__GPIO1_IO08, OUTPUT_40OHM),
NEW_PAD_CTRL(MX6_PAD_GPIO_6__GPIO1_IO06, OUTPUT_40OHM),
};
#define WL12XX_WL_IRQ_GP IMX_GPIO_NR(6, 14)
static unsigned gpios_out_low[] = {
/* Disable wl1271 */
IMX_GPIO_NR(6, 15), /* disable wireless */
IMX_GPIO_NR(6, 16), /* disable bluetooth */
IMX_GPIO_NR(3, 22), /* disable USB otg power */
IMX_GPIO_NR(2, 5), /* ov5640 mipi camera reset */
IMX_GPIO_NR(1, 8), /* ov5642 reset */
};
static unsigned gpios_out_high[] = {
IMX_GPIO_NR(1, 6), /* ov5642 powerdown */
IMX_GPIO_NR(6, 9), /* ov5640 mipi camera power down */
};
static void set_gpios(unsigned *p, int cnt, int val)
{
int i;
for (i = 0; i < cnt; i++)
gpio_direction_output(*p++, val);
}
int board_early_init_f(void)
{
setup_iomux_uart();
/* Disable wl1271 For Nitrogen6w */
set_gpios(gpios_out_high, ARRAY_SIZE(gpios_out_high), 1);
set_gpios(gpios_out_low, ARRAY_SIZE(gpios_out_low), 0);
gpio_direction_input(WL12XX_WL_IRQ_GP);
gpio_direction_output(WL12XX_WL_ENABLE_GP, 0);
gpio_direction_output(WL12XX_BT_ENABLE_GP, 0);
gpio_direction_output(GP_USB_OTG_PWR, 0); /* OTG power off */
imx_iomux_v3_setup_multiple_pads(wl12xx_pads, ARRAY_SIZE(wl12xx_pads));
imx_iomux_v3_setup_multiple_pads(init_pads, ARRAY_SIZE(init_pads));
setup_buttons();
#if defined(CONFIG_VIDEO_IPUV3)