summaryrefslogtreecommitdiff
path: root/include/linux/mmc/host.h
diff options
context:
space:
mode:
authorAries Lee <arieslee@jmicron.com>2010-12-15 08:14:24 +0100
committerChris Ball <cjb@laptop.org>2011-01-08 23:52:09 -0500
commit22113efd00491310da802f3b1a9a66cfcf415fac (patch)
tree1faf6e99a591f9b6856bab6c8318eeeacb076051 /include/linux/mmc/host.h
parente6f29a8dc1602e170daf955233891a9130573a55 (diff)
mmc: Test bus-width for old MMC devices
Some old MMC devices fail with the 4/8 bits the driver tries to use exclusively. This patch adds a test for the given bus setup and falls back to the lower bit mode (until 1-bit mode) when the test fails. [Major rework and refactoring by tiwai] [Quirk addition and many fixes by prakity] Signed-off-by: Aries Lee <arieslee@jmicron.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Philip Rakity <prakity@marvell.com> Tested-by: Philip Rakity <prakity@marvell.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc/host.h')
-rw-r--r--include/linux/mmc/host.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 3a85e73a38a9..bcb793ec7374 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -172,6 +172,7 @@ struct mmc_host {
#define MMC_CAP_1_2V_DDR (1 << 12) /* can support */
/* DDR mode at 1.2V */
#define MMC_CAP_POWER_OFF_CARD (1 << 13) /* Can power off after boot */
+#define MMC_CAP_BUS_WIDTH_TEST (1 << 14) /* CMD14/CMD19 bus width ok */
mmc_pm_flag_t pm_caps; /* supported pm features */