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phy: rockchip-inno-usb2: open pre-emphasize for rk3228

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Open pre-emphasize in non-chirp state for rk3228 USB
PHY0 otg port to increase HS slew rate.

Change-Id: Ia565746286a750a251619a83cbbead99c0ddecbd
Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
This commit is contained in:
William Wu
2018-04-13 10:04:28 +08:00
committed by Tao Huang
parent 98cc759785
commit 0eb0eba350
1 changed files with 12 additions and 0 deletions
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12
drivers/phy/rockchip/phy-rockchip-inno-usb2.c
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@@ -1933,6 +1933,17 @@ static int rk312x_usb2phy_tuning(struct rockchip_usb2phy *rphy)
return 0;
}
static int rk3228_usb2phy_tuning(struct rockchip_usb2phy *rphy)
{
int ret = 0;
/* Open pre-emphasize in non-chirp state for PHY0 otg port */
if (rphy->phy_cfg->reg == 0x760)
ret = regmap_write(rphy->grf, 0x76c, 0x00070004);
return ret;
}
static int rk3308_usb2phy_tuning(struct rockchip_usb2phy *rphy)
{
int ret;
@@ -2235,6 +2246,7 @@ static const struct rockchip_usb2phy_cfg rk3228_phy_cfgs[] = {
{
.reg = 0x760,
.num_ports = 2,
.phy_tuning = rk3228_usb2phy_tuning,
.clkout_ctl = { 0x0768, 4, 4, 1, 0 },
.port_cfgs = {
[USB2PHY_PORT_OTG] = {