sdhci: Add set_clock callback and a quirk for nonstandard clocks
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>
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 34ab77b..75d0ecb 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -949,6 +949,12 @@
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)