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authorJakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>2019-05-21 17:28:20 +0200
committerJakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>2019-05-21 17:29:04 +0200
commitd9bb659938cfeec97b01edf303f416d82f3adbea (patch)
treef039473198f823c0a9523383ed7efc3c4185f41a
parent6e36024ad688bfa13289c137799aecc4bbfc9604 (diff)
phy: rockchip-emmc: lower drive impedance to 33 ohm
Improves signal integrity on the RK3399-Q7 Puma. Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
-rw-r--r--drivers/phy/rockchip/phy-rockchip-emmc.c4
1 files 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));