@@ -1013,6 +1013,12 @@ 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)
@@ -225,6 +225,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<17)
/* Controller has all registers of 32 bit width */
#define SDHCI_QUIRK_32BIT_REGISTERS (1<<18)
+/* Controller has nonstandard clock management */
+#define SDHCI_QUIRK_NONSTANDARD_CLOCK (1<<19)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */
@@ -288,6 +290,8 @@ struct sdhci_ops {
void (*writew)(struct sdhci_host *host, u16 val, int reg);
void (*writeb)(struct sdhci_host *host, u8 val, int reg);
+ 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);
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> --- drivers/mmc/host/sdhci.c | 6 ++++++ drivers/mmc/host/sdhci.h | 4 ++++ 2 files changed, 10 insertions(+), 0 deletions(-)