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 <avoront...@ru.mvista.com> --- drivers/mmc/host/sdhci.c | 6 ++++++ 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 96a0482..f63db25 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -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) diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index ef70900..63b436a 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -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); -- 1.5.6.5 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
