Implement mmc_get_env_devno, support loading env successfully when booting from different slots.
Signed-off-by: Peng Fan Peng.Fan@freescale.com Cc: Stefano Babic sbabic@denx.de --- board/freescale/mx6slevk/mx6slevk.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c index 5eab4b5..7617c76 100644 --- a/board/freescale/mx6slevk/mx6slevk.c +++ b/board/freescale/mx6slevk/mx6slevk.c @@ -170,6 +170,22 @@ static struct fsl_esdhc_cfg usdhc_cfg[3] = { {USDHC3_BASE_ADDR, 0, 4}, };
+int mmc_get_env_devno(void) +{ + struct src *src_regs = (struct src *)SRC_BASE_ADDR; + u32 soc_sbmr = readl(&src_regs->sbmr1); + u32 bootsel; + + bootsel = (soc_sbmr & 0x000000FF) >> 6 ; + + /* If not boot from sd/mmc, use default value */ + if (bootsel != 1) + return CONFIG_SYS_MMC_ENV_DEV; + + /* BOOT_CFG2[3] and BOOT_CFG2[4] */ + return (soc_sbmr & 0x00001800) >> 11; +} + int board_mmc_getcd(struct mmc *mmc) { struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;