Implement mmc_get_env_devno, devno can be got from smbr1 of SRC.
Introduce a weak function board_mmc_get_env_devno, different
boards can implement it according to different sdhc controllers
that used by the board.
Signed-off-by: Peng Fan <peng....@nxp.com>
Cc: Stefano Babic <sba...@denx.de>
---
Changes V2:
move mmc_get_env_devno into soc.c
arch/arm/cpu/armv7/mx6/soc.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index bf5ae8c..fd383f2 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -349,6 +349,36 @@ int arch_cpu_init(void)
return 0;
}
+__weak int board_mmc_get_env_devno(int devno)
+{
+ return CONFIG_SYS_MMC_ENV_DEV;
+}
+
+int mmc_get_env_devno(void)
+{
+ struct src *src_regs = (struct src *)SRC_BASE_ADDR;
+ u32 soc_sbmr = readl(&src_regs->sbmr1);
+ u32 bootsel;
+ int devno;
+
+ /*
+ * Refer to
+ * "i.MX 6Dual/6Quad Applications Processor Reference Manual"
+ * Chapter "8.5.3.1 Expansion Device eFUSE Configuration"
+ * i.MX6SL/SX/UL has same layout.
+ */
+ 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] */
+ devno = (soc_sbmr & 0x00001800) >> 11;
+
+ return board_mmc_get_env_devno(devno);
+}
+
int board_postclk_init(void)
{
set_ldo_voltage(LDO_SOC, 1175); /* Set VDDSOC to 1.175V */
--
2.6.2
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