sdhci: be more strict with get_min_clock() usage
get_min_clock() makes sense only with NONSTANDARD_CLOCK quirk and when
set_clock() callback is specified.
The patch should cause no functional changes, it just makes the code
self-documented and avoids any possible misuse of get_min_clock().
Suggested-by: Pierre Ossman <pierre@ossman.eu>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: Philip Langdale <philipl@overt.org>
Cc: Pierre Ossman <pierre@ossman.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index fc96f8c..7f7f45b 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1772,7 +1772,8 @@
* Set host parameters.
*/
mmc->ops = &sdhci_ops;
- if (host->ops->get_min_clock)
+ if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK &&
+ host->ops->set_clock && host->ops->get_min_clock)
mmc->f_min = host->ops->get_min_clock(host);
else
mmc->f_min = host->max_clk / 256;