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sdhci: Add set_clock callback and a quirk for nonstandard clocks

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FSL eSDHC hosts have incompatible register map to manage the SDCLK.
This patch adds set_clock callback so that drivers could overwrite
set_clock behaviour.

Similar patch[1] was posted by Ben Dooks, though in Ben's version the
callback is named change_clock, plus the patch has some unrelated bits
that makes the patch difficult to reuse.

[1] http://lkml.org/lkml/2008/12/2/160

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Anton Vorontsov
2009-03-17 00:13:59 +03:00
committed by Pierre Ossman
parent 4240ff0a02
commit 8114634ccb
2 changed files with 10 additions and 0 deletions
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6
drivers/mmc/host/sdhci.c
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@@ -949,6 +949,12 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
if (clock == host->clock)
return;
if (host->ops->set_clock) {
host->ops->set_clock(host, clock);
if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK)
return;
}
sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
if (clock == 0)