[2/3] mmc: add support for h/w clock gating of sd controller

Commit Message

Philip Rakity Dec. 3, 2010, 7:28 p.m. UTC

None

Patch

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 8a74fcb..0feea35 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1188,6 +1188,12 @@  static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	if (host->ops->platform_send_init_74_clocks)
 		host->ops->platform_send_init_74_clocks(host, ios->power_mode);
 
+#ifdef CONFIG_MMC_CLKGATE
+	if ((mmc->caps & MMC_CAP_CLOCK_GATING_HW)
+		&& host->ops->platform_hw_clk_gate)
+			host->ops->platform_hw_clk_gate(host);
+#endif
+
 	/*
 	 * If your platform has 8-bit width support but is not a v3 controller,
 	 * or if it requires special setup code, you should implement that in
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 1efe7dc..26a8c09 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -221,6 +221,7 @@  struct sdhci_ops {
 	void (*platform_send_init_74_clocks)(struct sdhci_host *host,
 					     u8 power_mode);
 	unsigned int    (*get_ro)(struct sdhci_host *host);
+	void		(*platform_hw_clk_gate)(struct sdhci_host *host);
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS