mmc: sdhci_am654: Add support for clkbuf_sel property

Add support for writing new clkbuf_sel property for the J721e 4 bit IP.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Link: https://lore.kernel.org/r/20200619125801.9530-7-faiz_abbas@ti.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
index f7535ee..f9d24af 100644 (file)
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -47,6 +47,8 @@
 #define SEL100_MASK            BIT(SEL100_SHIFT)
 #define FREQSEL_SHIFT          8
 #define FREQSEL_MASK           GENMASK(10, 8)
+#define CLKBUFSEL_SHIFT                0
+#define CLKBUFSEL_MASK         GENMASK(2, 0)
 #define DLL_TRIM_ICP_SHIFT     4
 #define DLL_TRIM_ICP_MASK      GENMASK(7, 4)
 #define DR_TY_SHIFT            20
@@ -86,6 +88,7 @@ struct sdhci_am654_data {
        struct regmap *base;
        bool legacy_otapdly;
        int otap_del_sel[11];
+       int clkbuf_sel;
        int trm_icp;
        int drv_strength;
        bool dll_on;
@@ -238,6 +241,9 @@ static void sdhci_am654_set_clock(struct sdhci_host *host, unsigned int clock)
                regmap_update_bits(sdhci_am654->base, PHY_CTRL5,
                                   SELDLYTXCLK_MASK, 1 << SELDLYTXCLK_SHIFT);
        }
+
+       regmap_update_bits(sdhci_am654->base, PHY_CTRL5, CLKBUFSEL_MASK,
+                          sdhci_am654->clkbuf_sel);
 }
 
 static void sdhci_j721e_4bit_set_clock(struct sdhci_host *host,
@@ -260,6 +266,9 @@ static void sdhci_j721e_4bit_set_clock(struct sdhci_host *host,
              (otap_del_sel << OTAPDLYSEL_SHIFT);
        regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, val);
 
+       regmap_update_bits(sdhci_am654->base, PHY_CTRL5, CLKBUFSEL_MASK,
+                          sdhci_am654->clkbuf_sel);
+
        sdhci_set_clock(host, clock);
 }
 
@@ -582,6 +591,8 @@ static int sdhci_am654_get_of_property(struct platform_device *pdev,
        }
 
        device_property_read_u32(dev, "ti,strobe-sel", &sdhci_am654->strb_sel);
+       device_property_read_u32(dev, "ti,clkbuf-sel",
+                                &sdhci_am654->clkbuf_sel);
 
        sdhci_get_of_property(pdev);