colibri_imx6.c: prepare auxiliary pins to be GPIO

In order to use the gpio commandline feature of U-Boot the pins
one wants to control must be muxed to GPIO.
Do that for all unused pins which in the default kernel device tree also gets
muxed to gpio for userspace use.

This feature can be used as follows:
e.g. change the LCD brightness signal from 0V to 3.3V:
Colibri iMX6 # gpio set 41
gpio: pin 41 (gpio 41) value is 1

e.g. read the state of gpio 111:
Colibri iMX6 # gpio input 111
gpio: pin 111 (gpio 111) value is 1

1 files changed, 80 insertions, 0 deletions

diff --git a/board/toradex/colibri_imx6/colibri_imx6.c b/board/toradex/colibri_imx6/colibri_imx6.c
index 1464e30869..055f1cf2d4 100644
--- a/board/toradex/colibri_imx6/colibri_imx6.c
+++ b/board/toradex/colibri_imx6/colibri_imx6.c
@@ -166,6 +166,84 @@ static void setup_iomux_enet(void)
 	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
 }
 
+/* mux auxilary pins to gpio, so they can be used from the U-Boot commandline */
+iomux_v3_cfg_t const gpio_pads[] = {
+	/* ADDRESS[17:18] [25] used as GPIO */
+	MX6_PAD_KEY_ROW2__GPIO4_IO11	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_KEY_COL2__GPIO4_IO10	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_D1__GPIO2_IO01	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* ADDRESS[19:24] used as GPIO */
+	MX6_PAD_DISP0_DAT23__GPIO5_IO17 | MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_DISP0_DAT22__GPIO5_IO16 | MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_DISP0_DAT21__GPIO5_IO15 | MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_DISP0_DAT20__GPIO5_IO14 | MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_DISP0_DAT19__GPIO5_IO13 | MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_DISP0_DAT18__GPIO5_IO12 | MUX_PAD_CTRL(WEAK_PULLUP),
+	/* DATA[16:29] [31]	 used as GPIO */
+	MX6_PAD_EIM_LBA__GPIO2_IO27	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_BCLK__GPIO6_IO31	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_CS3__GPIO6_IO16	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_CS1__GPIO6_IO14	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_RB0__GPIO6_IO10	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_ALE__GPIO6_IO08	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_WP_B__GPIO6_IO09	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_CS0__GPIO6_IO11	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_CLE__GPIO6_IO07	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_GPIO_19__GPIO4_IO05	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_CSI0_MCLK__GPIO5_IO19	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_CSI0_PIXCLK__GPIO5_IO18 | MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_GPIO_4__GPIO1_IO04	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_GPIO_5__GPIO1_IO05	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_GPIO_2__GPIO1_IO02	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* DQM[0:3]	 used as GPIO */
+	MX6_PAD_EIM_EB0__GPIO2_IO28	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_EB1__GPIO2_IO29	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_SD2_DAT2__GPIO1_IO13	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_D0__GPIO2_IO00	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* RDY	used as GPIO */
+	MX6_PAD_EIM_WAIT__GPIO5_IO00	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* ADDRESS[16] DATA[30]	 used as GPIO */
+	MX6_PAD_KEY_ROW4__GPIO4_IO15	| MUX_PAD_CTRL(WEAK_PULLDOWN),
+	MX6_PAD_KEY_COL4__GPIO4_IO14	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* CSI pins used as GPIO */
+	MX6_PAD_EIM_A24__GPIO5_IO04	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_SD2_CMD__GPIO1_IO11	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_CS2__GPIO6_IO15	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_D18__GPIO3_IO18	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_A19__GPIO2_IO19	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_D29__GPIO3_IO29	| MUX_PAD_CTRL(WEAK_PULLDOWN),
+	MX6_PAD_EIM_A23__GPIO6_IO06	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_A20__GPIO2_IO18	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_A17__GPIO2_IO21	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_A18__GPIO2_IO20	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_EB3__GPIO2_IO31	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_D17__GPIO3_IO17	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_SD2_DAT0__GPIO1_IO15	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* GPIO */
+	MX6_PAD_EIM_D26__GPIO3_IO26	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_EIM_D27__GPIO3_IO27	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_D6__GPIO2_IO06	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_D3__GPIO2_IO03	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_ENET_REF_CLK__GPIO1_IO23| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_DI0_PIN4__GPIO4_IO20	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_SD4_DAT3__GPIO2_IO11	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_NANDF_D4__GPIO2_IO04	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_SD4_DAT0__GPIO2_IO08	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_GPIO_7__GPIO1_IO07	| MUX_PAD_CTRL(WEAK_PULLUP),
+	MX6_PAD_GPIO_8__GPIO1_IO08	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* USBH_OC */
+	MX6_PAD_EIM_D30__GPIO3_IO30	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* USBC_ID */
+	MX6_PAD_NANDF_D2__GPIO2_IO02	| MUX_PAD_CTRL(WEAK_PULLUP),
+	/* USBC_DET */
+	MX6_PAD_GPIO_17__GPIO7_IO12	| MUX_PAD_CTRL(WEAK_PULLUP),
+};
+
+static void setup_iomux_gpio(void)
+{
+	imx_iomux_v3_setup_multiple_pads(gpio_pads, ARRAY_SIZE(gpio_pads));
+}
+
 iomux_v3_cfg_t const usb_pads[] = {
 	/* TODO This pin has a dedicated USB power functionality, can we use it? */
 	/* USB_PE */
@@ -548,6 +626,8 @@ int board_init(void)
 	setup_sata();
 #endif
 
+	setup_iomux_gpio();
+
 	return 0;
 }