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drivers: marvell: comphy-a3700: Set TXDCLK_2X_SEL bit during PCIe initialization

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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
This commit is contained in:
Pali Rohár 2021-03-24 17:03:43 +01:00
parent ccec1bd5ca
commit 40d08192aa
2 changed files with 2 additions and 1 deletions
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2
drivers/marvell/comphy/phy-comphy-3700.c
View file

@ -835,7 +835,7 @@ static int mvebu_a3700_comphy_pcie_power_on(uint8_t comphy_index,
/* 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);
/*

1
drivers/marvell/comphy/phy-comphy-3700.h
View file

@ -104,6 +104,7 @@ enum {
#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