drivers: marvell: comphy-a3700: Set TXDCLK_2X_SEL bit during PCIe initialization
Marvell Armada 3700 Functional Specifications, section 52.2 PCIe Link
Initialization says that TXDCLK_2X_SEL bit needs to be enabled for PCIe
Root Complex mode. Both U-Boot and Linux kernel support only Root Complex
mode. Set this bit.
Signed-off-by: Pali Rohár <pali@kernel.org>
Change-Id: Id2a538c379b911b62597f9463b4842b7b5c24df7
diff --git a/drivers/marvell/comphy/phy-comphy-3700.c b/drivers/marvell/comphy/phy-comphy-3700.c
index df8c411..02fe97c 100644
--- a/drivers/marvell/comphy/phy-comphy-3700.c
+++ b/drivers/marvell/comphy/phy-comphy-3700.c
@@ -835,7 +835,7 @@
/* 6. Enable the output of 100M/125M/500M clock */
reg_set16(MISC_REG0_ADDR(PCIE) + COMPHY_SD_ADDR,
- MISC_REG0_DEFAULT_VALUE | CLK500M_EN | CLK100M_125M_EN,
+ MISC_REG0_DEFAULT_VALUE | CLK500M_EN | TXDCLK_2X_SEL | CLK100M_125M_EN,
REG_16_BIT_MASK);
/*
diff --git a/drivers/marvell/comphy/phy-comphy-3700.h b/drivers/marvell/comphy/phy-comphy-3700.h
index 1628e36..94056f1 100644
--- a/drivers/marvell/comphy/phy-comphy-3700.h
+++ b/drivers/marvell/comphy/phy-comphy-3700.h
@@ -104,6 +104,7 @@
#define COMPHY_MISC_REG0_ADDR 0x4F
#define MISC_REG0_ADDR(unit) (COMPHY_MISC_REG0_ADDR * PHY_SHFT(unit))
#define CLK100M_125M_EN BIT(4)
+#define TXDCLK_2X_SEL BIT(6)
#define CLK500M_EN BIT(7)
#define PHY_REF_CLK_SEL BIT(10)
#define MISC_REG0_DEFAULT_VALUE 0xA00D