diff options
| author | Jason Liu <r64343@freescale.com> | 2013-06-20 16:52:50 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2013-06-20 18:04:17 +0800 |
| commit | dccc698c3571eaa9d8a04ad77787b5d0d716e0de (patch) | |
| tree | b16bb006da585b1bc1d24530edd2edeabca2be00 | |
| parent | 264ad1a3bb3051aebed6c7c4c408a3629ad89210 (diff) | |
| download | u-boot-imx-dccc698c3571eaa9d8a04ad77787b5d0d716e0de.zip u-boot-imx-dccc698c3571eaa9d8a04ad77787b5d0d716e0de.tar.gz u-boot-imx-dccc698c3571eaa9d8a04ad77787b5d0d716e0de.tar.bz2 | |
ENGR00268061-2 imx6/sabresd: add the dynamtic mmc dev support
This patch add the support to load/save env to the slot which
was used as the boot media by dynamic detection.
The slot(usdhcx) vs real mmc dev number is board dependent:
on imx6q/dl sabresd board, the map is as the followings:
slot(USDHCx) mmc dev number
SD2(USDHC2) 0
SD3(USDHC3) 1
SD4(USDHC4) 2
Signed-off-by: Jason Liu <r64343@freescale.com>
| -rw-r--r-- | board/freescale/mx6qsabresd/mx6qsabresd.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/board/freescale/mx6qsabresd/mx6qsabresd.c b/board/freescale/mx6qsabresd/mx6qsabresd.c index a014596..bbe7b32 100644 --- a/board/freescale/mx6qsabresd/mx6qsabresd.c +++ b/board/freescale/mx6qsabresd/mx6qsabresd.c @@ -283,6 +283,24 @@ struct fsl_esdhc_cfg usdhc_cfg[3] = { {USDHC4_BASE_ADDR}, }; +int mmc_get_env_devno(void) +{ + u32 soc_sbmr = readl(SRC_BASE_ADDR + 0x4); + u32 dev_no; + + /* BOOT_CFG2[3] and BOOT_CFG2[4] */ + dev_no = (soc_sbmr & 0x00001800) >> 11; + + /* need ubstract 1 to map to the mmc device id + * see the comments in board_mmc_init function + */ + + dev_no--; + + return dev_no; +} + + #define USDHC2_CD_GPIO IMX_GPIO_NR(2, 2) #define USDHC3_CD_GPIO IMX_GPIO_NR(2, 0) |