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authorAries Lee <arieslee@jmicron.com>2010-12-15 10:14:24 +0300
committerChris Ball <cjb@laptop.org>2011-01-09 07:52:09 +0300
commit22113efd00491310da802f3b1a9a66cfcf415fac (patch)
tree1faf6e99a591f9b6856bab6c8318eeeacb076051 /drivers/mmc/core/mmc_ops.h
parente6f29a8dc1602e170daf955233891a9130573a55 (diff)
downloadlinux-22113efd00491310da802f3b1a9a66cfcf415fac.tar.xz
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 'drivers/mmc/core/mmc_ops.h')
-rw-r--r--drivers/mmc/core/mmc_ops.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
index 653eb8e84178..e6d44b8a18db 100644
--- a/drivers/mmc/core/mmc_ops.h
+++ b/drivers/mmc/core/mmc_ops.h
@@ -26,6 +26,7 @@ int mmc_send_cid(struct mmc_host *host, u32 *cid);
int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
int mmc_card_sleepawake(struct mmc_host *host, int sleep);
+int mmc_bus_test(struct mmc_card *card, u8 bus_width);
#endif