The eMMC HW partition 0 and 7 both mean USER HW partition. Use this as a mean of propagating A/B copy selection within USER HW partition. The spl_mmc_get_uboot_raw_sector() can detect that a USER HW partition is in use and based on whether it is 0 or 7, select appropriate sector to load from.
Signed-off-by: Fedor Ross fedor.ross@ifm.com Signed-off-by: Marek Vasut marex@denx.de --- Cc: Jaehoon Chung jh80.chung@samsung.com Cc: Peng Fan peng.fan@nxp.com --- V2: Initialize the part variable, else it is passed uninitialized to mmc_load_image_raw_sector(..raw_sect + spl_mmc_raw_uboot_offset(part)); and that prevents pine64 from booting. Interestingly enough, there is no warning emitted, which sounds like a compiler bug. V3: Update on u-boot/master --- common/spl/spl_mmc.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/common/spl/spl_mmc.c b/common/spl/spl_mmc.c index f1f87d78ba7..865c395b9fe 100644 --- a/common/spl/spl_mmc.c +++ b/common/spl/spl_mmc.c @@ -412,7 +412,7 @@ int spl_mmc_load(struct spl_image_info *spl_image, static struct mmc *mmc; u32 boot_mode; int err = 0; - __maybe_unused int hw_part = 0; + __maybe_unused int part = 0, hw_part = 0; int mmc_dev;
/* Perform peripheral init only once for an mmc device */ @@ -437,11 +437,12 @@ int spl_mmc_load(struct spl_image_info *spl_image, switch (boot_mode) { case MMCSD_MODE_EMMCBOOT: hw_part = spl_mmc_emmc_boot_partition(mmc); + part = hw_part == 7 ? 0 : hw_part;
if (CONFIG_IS_ENABLED(MMC_TINY)) - err = mmc_switch_part(mmc, hw_part); + err = mmc_switch_part(mmc, part); else - err = blk_dselect_hwpart(mmc_get_blk_desc(mmc), hw_part); + err = blk_dselect_hwpart(mmc_get_blk_desc(mmc), part);
if (err) { #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT @@ -471,7 +472,7 @@ int spl_mmc_load(struct spl_image_info *spl_image, #endif #ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR err = mmc_load_image_raw_sector(spl_image, bootdev, mmc, - raw_sect + spl_mmc_raw_uboot_offset(hw_part)); + raw_sect + spl_mmc_raw_uboot_offset(part)); if (!err) return err; #endif