[PATCH v4 04/21] mmc: am654_sdhci: Add flag for PHY calibration

[Aswath Govindraju]

From: Faiz Abbas <faiz_abbas at ti.com>

Not all controllers need calibration for the PHY DLL. Add a DLL_CALIB
flag to indicate the same.

Also move the write of trm_icp and driver strength to the set_clock()
function to match the kernel configuration flow.

Signed-off-by: Faiz Abbas <faiz_abbas at ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju at ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>
---
 drivers/mmc/am654_sdhci.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c
index e0136dff9711..1e0654183811 100644
--- a/drivers/mmc/am654_sdhci.c
+++ b/drivers/mmc/am654_sdhci.c
@@ -84,6 +84,7 @@ struct am654_sdhci_plat {
 #define IOMUX_PRESENT	BIT(1)
 #define FREQSEL_2_BIT	BIT(2)
 #define STRBSEL_4_BIT	BIT(3)
+#define DLL_CALIB	BIT(4)
 };
 
 struct timing_data {
@@ -195,6 +196,15 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host)
 					   freqsel << FREQSEL_SHIFT);
 		}
 
+		/* Configure DLL TRIM */
+		mask = DLL_TRIM_ICP_MASK;
+		val = plat->trm_icp << DLL_TRIM_ICP_SHIFT;
+
+		/* Configure DLL driver strength */
+		mask |= DR_TY_MASK;
+		val |= plat->drv_strength << DR_TY_SHIFT;
+		regmap_update_bits(plat->base, PHY_CTRL1, mask, val);
+
 		/* Enable DLL */
 		regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK,
 				   0x1 << ENDLL_SHIFT);
@@ -221,7 +231,7 @@ int am654_sdhci_init(struct am654_sdhci_plat *plat)
 	mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;
 	regmap_update_bits(plat->base, PHY_CTRL4, mask, 0x0);
 
-	if (plat->flags & DLL_PRESENT) {
+	if (plat->flags & DLL_CALIB) {
 		regmap_read(plat->base, PHY_STAT1, &val);
 		if (~val & CALDONE_MASK) {
 			/* Calibrate IO lines */
@@ -233,15 +243,6 @@ int am654_sdhci_init(struct am654_sdhci_plat *plat)
 			if (ret)
 				return ret;
 		}
-
-		/* Configure DLL TRIM */
-		mask = DLL_TRIM_ICP_MASK;
-		val = plat->trm_icp << DLL_TRIM_ICP_SHIFT;
-
-		/* Configure DLL driver strength */
-		mask |= DR_TY_MASK;
-		val |= plat->drv_strength << DR_TY_SHIFT;
-		regmap_update_bits(plat->base, PHY_CTRL1, mask, val);
 	}
 
 	/* Enable pins by setting IO mux to 0 */
@@ -292,12 +293,13 @@ const struct sdhci_ops am654_sdhci_ops = {
 
 const struct am654_driver_data am654_drv_data = {
 	.ops = &am654_sdhci_ops,
-	.flags = IOMUX_PRESENT | FREQSEL_2_BIT | DLL_PRESENT | STRBSEL_4_BIT,
+	.flags = IOMUX_PRESENT | FREQSEL_2_BIT | DLL_PRESENT | DLL_CALIB |
+		 STRBSEL_4_BIT,
 };
 
 const struct am654_driver_data j721e_8bit_drv_data = {
 	.ops = &am654_sdhci_ops,
-	.flags = DLL_PRESENT,
+	.flags = DLL_PRESENT | DLL_CALIB,
 };
 
 static int j721e_4bit_sdhci_set_ios_post(struct sdhci_host *host)
-- 
2.17.1