mmc: Retry some MMC cmds on failure
With certain SD cards like Kingston 8GB/16GB UHS card, it is seen that
MMC_CMD_ALL_SEND_CID cmd fails on first attempt, but succeeds
subsequently. Therefore, retry MMC_CMD_ALL_SEND_CID cmd a few time
as done in Linux kernel.
Similarly, it is seen that MMC_CMD_SET_BLOCKLEN may fail on first
attempt, therefore retry this cmd a few times as done in kernel.
To make it clear that those are optionnal workarounds, a new Kconfig
option 'MMC_QUIRKS' is added (enabled by default).
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index a8a689f..006c901 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -42,6 +42,15 @@
If you have an ARM(R) platform with a Multimedia Card slot,
say Y or M here.
+config MMC_QUIRKS
+ bool "Enable quirks"
+ default y
+ help
+ Some cards and hosts may sometimes behave unexpectedly (quirks).
+ This option enable workarounds to handle those quirks. Some of them
+ are enabled by default, other may require additionnal flags or are
+ enabled by the host driver.
+
config MMC_VERBOSE
bool "Output more information about the MMC"
default y