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wandboard: Add board revision detection support

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There are two revisions of wandboard: version B1 and C1.

Add the revision detection support, so that the correct dtb file can
be automatically loaded.

Based on the patch from Richard Hu <hakahu@gmail.com>.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
Tested-By: Vagrant Cascadian <vagrant@aikidev.net>
This commit is contained in:
Fabio Estevam 2015-05-21 19:24:05 -03:00 committed by Stefano Babic
parent c0c5341e73
commit 9a8804a85e
2 changed files with 31 additions and 3 deletions
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26
board/wandboard/wandboard.c
View File

@ -50,6 +50,7 @@ DECLARE_GLOBAL_DATA_PTR;
#define USDHC1_CD_GPIO IMX_GPIO_NR(1, 2)
#define USDHC3_CD_GPIO IMX_GPIO_NR(3, 9)
#define ETH_PHY_RESET IMX_GPIO_NR(3, 29)
#define REV_DETECTION IMX_GPIO_NR(2, 28)
int dram_init(void)
{
@ -105,6 +106,10 @@ static iomux_v3_cfg_t const enet_pads[] = {
IOMUX_PADS(PAD_EIM_D29__GPIO3_IO29 | MUX_PAD_CTRL(NO_PAD_CTRL)),
};
static iomux_v3_cfg_t const rev_detection_pad[] = {
IOMUX_PADS(PAD_EIM_EB0__GPIO2_IO28 | MUX_PAD_CTRL(NO_PAD_CTRL)),
};
static void setup_iomux_uart(void)
{
SETUP_IOMUX_PADS(uart1_pads);
@ -393,6 +398,17 @@ static const struct boot_mode board_boot_modes[] = {
};
#endif
static bool is_revc1(void)
{
SETUP_IOMUX_PADS(rev_detection_pad);
gpio_direction_input(REV_DETECTION);
if (gpio_get_value(REV_DETECTION))
return true;
else
return false;
}
int board_late_init(void)
{
#ifdef CONFIG_CMD_BMODE
@ -404,6 +420,11 @@ int board_late_init(void)
setenv("board_rev", "MX6Q");
else
setenv("board_rev", "MX6DL");
if (is_revc1())
setenv("board_name", "C1");
else
setenv("board_name", "B1");
#endif
return 0;
}
@ -424,7 +445,10 @@ int board_init(void)
int checkboard(void)
{
puts("Board: Wandboard\n");
if (is_revc1())
puts("Board: Wandboard rev C1\n");
else
puts("Board: Wandboard rev B1\n");
return 0;
}

8
include/configs/wandboard.h
View File

@ -194,10 +194,14 @@
"bootz; " \
"fi;\0" \
"findfdt="\
"if test $board_rev = MX6Q ; then " \
"if test $board_name = C1 && test $board_rev = MX6Q ; then " \
"setenv fdtfile imx6q-wandboard.dtb; fi; " \
"if test $board_rev = MX6DL ; then " \
"if test $board_name = C1 && test $board_rev = MX6DL ; then " \
"setenv fdtfile imx6dl-wandboard.dtb; fi; " \
"if test $board_name = B1 && test $board_rev = MX6Q ; then " \
"setenv fdtfile imx6q-wandboard-revb1.dtb; fi; " \
"if test $board_name = B1 && test $board_rev = MX6DL ; then " \
"setenv fdtfile imx6dl-wandboard-revb1.dtb; fi; " \
"if test $fdtfile = undefined; then " \
"echo WARNING: Could not determine dtb to use; fi; \0" \