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| author | Anton Vorontsov | 2010-05-26 23:41:53 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2010-05-27 18:12:39 +0200 |
| commit | f27f47ef5b67106ff1cdeebf061387a7b30c12bc (patch) | |
| tree | 0238bc989cefa0df4e64eaa3c21c182c66c294c4 /drivers/mmc/host/sdhci.c | |
| parent | mmc-omap: add support for 16-bit and 32-bit registers (diff) | |
| download | kernel-qcow2-linux-f27f47ef5b67106ff1cdeebf061387a7b30c12bc.tar.gz kernel-qcow2-linux-f27f47ef5b67106ff1cdeebf061387a7b30c12bc.tar.xz kernel-qcow2-linux-f27f47ef5b67106ff1cdeebf061387a7b30c12bc.zip | |
sdhci: implement CAP_CLOCK_BASE_BROKEN quirk
Some hosts (e.g. as found in CNS3xxx SOCs) report wrong value in
CLOCK_BASE capability field, and currently there is no way to force the
SDHCI core to use the platform-provided base clock value.
This patch implements CAP_CLOCK_BASE_BROKEN quirk. When enabled, the
SDHCI core will always use base clock frequency provided by the platform.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Richard Röjfors <richard.rojfors@pelagicore.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 9d4fdfa685e5..02b365f5a4be 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1744,7 +1744,8 @@ int sdhci_add_host(struct sdhci_host *host) host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT; host->max_clk *= 1000000; - if (host->max_clk == 0) { + if (host->max_clk == 0 || host->quirks & + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) { if (!host->ops->get_max_clock) { printk(KERN_ERR "%s: Hardware doesn't specify base clock " |