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| author | Stephen Warren <swarren@nvidia.com> | 2012-07-30 10:55:43 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-09-05 17:32:41 -0500 |
| commit | 8948ea830275afaa7c91fe7e13dd3c4b894a453f (patch) | |
| tree | eacb0bff88c42d717293454fa064ec2e4f8d6d8f /drivers | |
| parent | 122efd43899597e79bbe0a11298279f90ee55a17 (diff) | |
| download | blackbird-obmc-uboot-8948ea830275afaa7c91fe7e13dd3c4b894a453f.tar.gz blackbird-obmc-uboot-8948ea830275afaa7c91fe7e13dd3c4b894a453f.zip | |
mmc: detect boot sectors using EXT_CSD_BOOT_MULT too
Some eMMC devices contain boot partitions, but do not set the PART_SUPPORT
bit in EXT_CSD_PARTITIONING_SUPPORT. Allow partition selection on such
devices, by enabling partition switching when EXT_CSD_BOOT_MULT is set.
Note that the Linux kernel enables access to boot partitions solely based
on the value of EXT_CSD_BOOT_MULT; EXT_CSD_PARTITIONING_SUPPORT only
influences access to "general" partitions.
eMMC devices affected by this issue exist on various NVIDIA Tegra
platforms (and presumably many others too), such as Harmony (plug-in eMMC),
Seaboard, Springbank, and Whistler (plug-in eMMC).
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/mmc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 1f666c2fdc..64abe5b1c8 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1137,7 +1137,8 @@ int mmc_startup(struct mmc *mmc) } /* store the partition info of emmc */ - if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) + if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || + ext_csd[EXT_CSD_BOOT_MULT]) mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; } |
