From: Anton Vorontsov Date: Mon, 16 Mar 2009 21:13:59 +0000 (+0300) Subject: sdhci: Add set_clock callback and a quirk for nonstandard clocks X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8114634ccb54d67a8c01e5825d95bff4e7f7b357;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git 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 Signed-off-by: Pierre Ossman --- 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);