Set VCOPLL clamp mode to mode 0 to avoid hardware unstable issue.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
---
drivers/phy/socionext/phy-uniphier-pcie.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/phy/socionext/phy-uniphier-pcie.c b/drivers/phy/socionext/phy-uniphier-pcie.c
index fde8aac5f4b6..2bd8df619712 100644
--- a/drivers/phy/socionext/phy-uniphier-pcie.c
+++ b/drivers/phy/socionext/phy-uniphier-pcie.c
@@ -51,6 +51,9 @@
#define PCL_PHY_R26 26
#define VCO_CTRL GENMASK(7, 4) /* Tx VCO adjustment value */
#define VCO_CTRL_INIT_VAL 5
+#define PCL_PHY_R28 28
+#define VCOPLL_CLMP GENMASK(3, 2) /* Tx VCOPLL clamp mode */
+#define VCOPLL_CLMP_VAL 0
struct uniphier_pciephy_priv {
void __iomem *base;
@@ -158,6 +161,8 @@ static int uniphier_pciephy_init(struct phy *phy)
FIELD_PREP(RX_EQ_ADJ, RX_EQ_ADJ_VAL));
uniphier_pciephy_set_param(priv, PCL_PHY_R26, VCO_CTRL,
FIELD_PREP(VCO_CTRL, VCO_CTRL_INIT_VAL));
+ uniphier_pciephy_set_param(priv, PCL_PHY_R28, VCOPLL_CLMP,
+ FIELD_PREP(VCOPLL_CLMP, VCOPLL_CLMP_VAL));
usleep_range(1, 10);
uniphier_pciephy_deassert(priv);
--
2.7.4
