mmc: detect boot sectors using EXT_CSD_BOOT_MULT too
authorStephen Warren <swarren@nvidia.com>
Mon, 30 Jul 2012 10:55:43 +0000 (10:55 +0000)
committerAndy Fleming <afleming@freescale.com>
Wed, 5 Sep 2012 22:32:41 +0000 (17:32 -0500)
commit8948ea830275afaa7c91fe7e13dd3c4b894a453f
treeeacb0bff88c42d717293454fa064ec2e4f8d6d8f
parent122efd43899597e79bbe0a11298279f90ee55a17
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>
drivers/mmc/mmc.c
include/mmc.h