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[5/6] phy: uniphier-usb3hs: Change Rx sync mode to avoid communication failure

Message ID 1573035979-32200-6-git-send-email-hayashi.kunihiko@socionext.com
State Accepted
Commit 25858c5213d2d69b568bf28b960a3b999ebc3ea9
Headers show
Series phy: socionext: Add some improvements and legacy SoC support | expand

Commit Message

Kunihiko Hayashi Nov. 6, 2019, 10:26 a.m. UTC 
In case of using default parameters, communication failure might occur
in rare cases. This sets Rx sync mode parameter to avoid the issue.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>

---
 drivers/phy/socionext/phy-uniphier-usb3hs.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

-- 
2.7.4
diff mbox series

Patch

diff --git a/drivers/phy/socionext/phy-uniphier-usb3hs.c b/drivers/phy/socionext/phy-uniphier-usb3hs.c
index bdf696e..a9bc741 100644
--- a/drivers/phy/socionext/phy-uniphier-usb3hs.c
+++ b/drivers/phy/socionext/phy-uniphier-usb3hs.c
@@ -41,10 +41,12 @@ 
 
 #define PHY_F(regno, msb, lsb) { (regno), (msb), (lsb) }
 
+#define RX_CHK_SYNC	PHY_F(0, 5, 5)	/* RX sync mode */
+#define RX_SYNC_SEL	PHY_F(1, 1, 0)	/* RX sync length */
 #define LS_SLEW		PHY_F(10, 6, 6)	/* LS mode slew rate */
 #define FS_LS_DRV	PHY_F(10, 5, 5)	/* FS/LS slew rate */
 
-#define MAX_PHY_PARAMS	2
+#define MAX_PHY_PARAMS	4
 
 struct uniphier_u3hsphy_param {
 	struct {
@@ -395,13 +397,19 @@  static const struct uniphier_u3hsphy_soc_data uniphier_pro5_data = {
 
 static const struct uniphier_u3hsphy_soc_data uniphier_pxs2_data = {
 	.is_legacy = false,
-	.nparams = 0,
+	.nparams = 2,
+	.param = {
+		{ RX_CHK_SYNC, 1 },
+		{ RX_SYNC_SEL, 1 },
+	},
 };
 
 static const struct uniphier_u3hsphy_soc_data uniphier_ld20_data = {
 	.is_legacy = false,
-	.nparams = 2,
+	.nparams = 4,
 	.param = {
+		{ RX_CHK_SYNC, 1 },
+		{ RX_SYNC_SEL, 1 },
 		{ LS_SLEW, 1 },
 		{ FS_LS_DRV, 1 },
 	},
@@ -412,7 +420,11 @@  static const struct uniphier_u3hsphy_soc_data uniphier_ld20_data = {
 
 static const struct uniphier_u3hsphy_soc_data uniphier_pxs3_data = {
 	.is_legacy = false,
-	.nparams = 0,
+	.nparams = 2,
+	.param = {
+		{ RX_CHK_SYNC, 1 },
+		{ RX_SYNC_SEL, 1 },
+	},
 	.trim_func = uniphier_u3hsphy_trim_ld20,
 	.config0 = 0x92316680,
 	.config1 = 0x00000106,