[U-Boot] [PATCH 28/33] mmc: sdhci: export sdhci_set_clock()

[Ziyuan Xu]

For arasan-rk3399-sdhci controller, we should make sure the phy is in
poweroff status before we configure the clock stuff. So that we need to
export it for phy configuration.

Signed-off-by: Ziyuan Xu <xzy.xu at rock-chips.com>
---

 drivers/mmc/sdhci.c | 16 +++++++---------
 include/sdhci.h     |  5 ++++-
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 5c6dbdc..b9cd13a 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -301,9 +301,8 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
 		return -ECOMM;
 }
 
-static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
+int sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 {
-	struct sdhci_host *host = mmc->priv;
 	unsigned int div, clk = 0, timeout;
 
 	/* Wait max 20 ms */
@@ -319,12 +318,10 @@ static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
 		timeout--;
 		udelay(100);
 	}
-
 	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
 
 	if (clock == 0)
 		return 0;
-
 	if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
 		/*
 		 * Check if the Host Controller supports Programmable Clock
@@ -365,7 +362,6 @@ static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
 		}
 		div >>= 1;
 	}
-
 	if (host->ops && host->ops->set_clock_ext)
 		host->ops->set_clock_ext(host, div);
 
@@ -387,12 +383,10 @@ static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
 		timeout--;
 		udelay(1000);
 	}
-
 	clk |= SDHCI_CLOCK_CARD_EN;
 	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 
 	host->clock = clock;
-
 	return 0;
 }
 
@@ -490,8 +484,12 @@ static int sdhci_set_ios(struct mmc *mmc)
 	if (host->ops && host->ops->set_control_reg)
 		host->ops->set_control_reg(host);
 
-	if (mmc->clock != host->clock)
-		sdhci_set_clock(mmc, mmc->clock);
+	if (mmc->clock != host->clock) {
+		if (host->ops && host->ops->set_clock)
+			host->ops->set_clock(host, mmc->clock);
+		else
+			sdhci_set_clock(host, mmc->clock);
+	}
 
 	/* Set bus width */
 	ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
diff --git a/include/sdhci.h b/include/sdhci.h
index 449ada1..da21194 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -254,7 +254,8 @@ struct sdhci_ops {
 	int	(*get_cd)(struct sdhci_host *host);
 	void	(*set_control_reg)(struct sdhci_host *host);
 	void	(*set_ios_post)(struct sdhci_host *host);
-	void	(*set_clock)(struct sdhci_host *host, u32 div);
+	int	(*set_clock)(struct sdhci_host *host, unsigned int clock);
+	void	(*set_clock_ext)(struct sdhci_host *host, u32 div);
 };
 
 struct sdhci_host {
@@ -279,6 +280,8 @@ struct sdhci_host {
 	struct mmc_config cfg;
 };
 
+int sdhci_set_clock(struct sdhci_host *host, unsigned int clock);
+
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
 
 static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
-- 
2.7.4