diff options
| author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-03-17 00:13:59 +0300 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2009-03-24 23:30:09 +0300 |
| commit | 8114634ccb54d67a8c01e5825d95bff4e7f7b357 (patch) | |
| tree | e80edf6881a8366fadbd4ec06574af8ab6306c24 /drivers/mmc | |
| parent | 4240ff0a02cb52f7d10dc1df6d82ba9c27dba07b (diff) | |
| download | linux-8114634ccb54d67a8c01e5825d95bff4e7f7b357.tar.xz | |
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>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 6 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 34ab77bd12ae..75d0ecbce10c 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -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) diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index aab0652a4585..b9bc622735ba 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -218,6 +218,8 @@ struct sdhci_host { #define SDHCI_QUIRK_BROKEN_CARD_DETECTION (1<<15) /* Controller reports inverted write-protect state */ #define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<16) +/* Controller has nonstandard clock management */ +#define SDHCI_QUIRK_NONSTANDARD_CLOCK (1<<17) int irq; /* Device IRQ */ void __iomem * ioaddr; /* Mapped address */ @@ -284,6 +286,8 @@ struct sdhci_ops { void (*writeb)(struct sdhci_host *host, u8 val, int reg); #endif + void (*set_clock)(struct sdhci_host *host, unsigned int clock); + int (*enable_dma)(struct sdhci_host *host); unsigned int (*get_max_clock)(struct sdhci_host *host); unsigned int (*get_timeout_clock)(struct sdhci_host *host); |