From d9bb659938cfeec97b01edf303f416d82f3adbea Mon Sep 17 00:00:00 2001 From: Jakob Unterwurzacher Date: Tue, 21 May 2019 17:28:20 +0200 Subject: phy: rockchip-emmc: lower drive impedance to 33 ohm Improves signal integrity on the RK3399-Q7 Puma. Signed-off-by: Jakob Unterwurzacher --- drivers/phy/rockchip/phy-rockchip-emmc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/phy/rockchip/phy-rockchip-emmc.c b/drivers/phy/rockchip/phy-rockchip-emmc.c index b69a0a796473..0747b7807edf 100644 --- a/drivers/phy/rockchip/phy-rockchip-emmc.c +++ b/drivers/phy/rockchip/phy-rockchip-emmc.c @@ -286,10 +286,10 @@ static int rockchip_emmc_phy_power_on(struct phy *phy) { struct rockchip_emmc_phy *rk_phy = phy_get_drvdata(phy); - /* Drive impedance: 50 Ohm */ + /* Drive impedance: 33 Ohm */ regmap_write(rk_phy->reg_base, rk_phy->reg_offset + GRF_EMMCPHY_CON6, - HIWORD_UPDATE(PHYCTRL_DR_50OHM, + HIWORD_UPDATE(PHYCTRL_DR_33OHM, PHYCTRL_DR_MASK, PHYCTRL_DR_SHIFT)); -- cgit v1.2.3