Merge remote-tracking branch 'omap_dss2/for-next'

[deliverable/linux.git] / drivers / mmc / host / sdhci-st.c

diff --git a/drivers/mmc/host/sdhci-st.c b/drivers/mmc/host/sdhci-st.c
index c95ba83366a0f2d95b1b45a70824327069f6b79d..ed92ce729dde1d60b91ce5395e1802816cca448b 100644 (file)
--- a/drivers/mmc/host/sdhci-st.c
+++ b/drivers/mmc/host/sdhci-st.c
@@ -28,6 +28,7 @@
 
 struct st_mmc_platform_data {
        struct  reset_control *rstc;
+       struct  clk *icnclk;
        void __iomem *top_ioaddr;
 };
 
@@ -353,7 +354,7 @@ static int sdhci_st_probe(struct platform_device *pdev)
        struct sdhci_host *host;
        struct st_mmc_platform_data *pdata;
        struct sdhci_pltfm_host *pltfm_host;
-       struct clk *clk;
+       struct clk *clk, *icnclk;
        int ret = 0;
        u16 host_version;
        struct resource *res;
@@ -365,6 +366,11 @@ static int sdhci_st_probe(struct platform_device *pdev)
                return PTR_ERR(clk);
        }
 
+       /* ICN clock isn't compulsory, but use it if it's provided. */
+       icnclk = devm_clk_get(&pdev->dev, "icn");
+       if (IS_ERR(icnclk))
+               icnclk = NULL;
+
        rstc = devm_reset_control_get(&pdev->dev, NULL);
        if (IS_ERR(rstc))
                rstc = NULL;
@@ -389,6 +395,7 @@ static int sdhci_st_probe(struct platform_device *pdev)
        }
 
        clk_prepare_enable(clk);
+       clk_prepare_enable(icnclk);
 
        /* Configure the FlashSS Top registers for setting eMMC TX/RX delay */
        res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@@ -400,6 +407,7 @@ static int sdhci_st_probe(struct platform_device *pdev)
        }
 
        pltfm_host->clk = clk;
+       pdata->icnclk = icnclk;
 
        /* Configure the Arasan HC inside the flashSS */
        st_mmcss_cconfig(np, host);
@@ -422,6 +430,7 @@ static int sdhci_st_probe(struct platform_device *pdev)
        return 0;
 
 err_out:
+       clk_disable_unprepare(icnclk);
        clk_disable_unprepare(clk);
 err_of:
        sdhci_pltfm_free(pdev);
@@ -442,6 +451,8 @@ static int sdhci_st_remove(struct platform_device *pdev)
 
        ret = sdhci_pltfm_unregister(pdev);
 
+       clk_disable_unprepare(pdata->icnclk);
+
        if (rstc)
                reset_control_assert(rstc);
 
@@ -462,6 +473,7 @@ static int sdhci_st_suspend(struct device *dev)
        if (pdata->rstc)
                reset_control_assert(pdata->rstc);
 
+       clk_disable_unprepare(pdata->icnclk);
        clk_disable_unprepare(pltfm_host->clk);
 out:
        return ret;
@@ -475,6 +487,7 @@ static int sdhci_st_resume(struct device *dev)
        struct device_node *np = dev->of_node;
 
        clk_prepare_enable(pltfm_host->clk);
+       clk_prepare_enable(pdata->icnclk);
 
        if (pdata->rstc)
                reset_control_deassert(pdata->rstc);