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| author | Hein Tibosch <hein_tibosch@yahoo.es> | 2010-09-06 09:37:19 +0800 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-10-23 21:11:15 +0800 |
| commit | 88ae8b866488031b0e2fc05a27440fefec5e6927 (patch) | |
| tree | 07fba0c9aab5c50230fcac22e74506622fa19c68 /include/linux/mmc | |
| parent | 176d1ed426a2a73a87c62a8aa05f6d002353cd50 (diff) | |
| download | op-kernel-dev-88ae8b866488031b0e2fc05a27440fefec5e6927.zip op-kernel-dev-88ae8b866488031b0e2fc05a27440fefec5e6927.tar.gz | |
mmc: Make ID freq configurable
In the latest releases of the mmc driver, the freq during initialization
is set to a fixed 400 Khz. This was reportedly too fast for several
users. As there doesn't seem to be an ideal frequency
which-works-for-all, Pierre suggested to let the driver try several
frequencies.
This patch implements that idea. It will try mmc-initialization using
several frequencies from an array 400, 300, 200 and 100.
In case SDIO is broken, it'll still try to detect SDMEM, also at different
freqs.
Signed-off-by: Hein Tibosch <hein_tibosch@yahoo.es>
Cc: Pierre Ossman <pierre@ossman.eu>
Reviewed-by: Chris Ball <cjb@laptop.org>
Tested-by: Chris Ball <cjb@laptop.org>
Cc: Ben Nizette <bn@niasdigital.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 2e0fe62..20be040 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -123,6 +123,7 @@ struct mmc_host { const struct mmc_host_ops *ops; unsigned int f_min; unsigned int f_max; + unsigned int f_init; u32 ocr_avail; struct notifier_block pm_notify; |
