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phy: rockchip-inno-usb2: turn off differential receiver in suspend mode

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Turn off differential receiver in suspend mode to save power

Change-Id: Idd9b4c2d7d9d78915c94946ced99737683a2ce91
Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
This commit is contained in:
Meng Dongyang
2017-11-22 17:43:09 +08:00
committed by Tao Huang
parent 864f960310
commit 4bffa7c5ea
1 changed files with 13 additions and 0 deletions
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13
drivers/phy/rockchip/phy-rockchip-inno-usb2.c
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@@ -1797,6 +1797,18 @@ disable_clks:
return ret;
}
static int rk312x_usb2phy_tuning(struct rockchip_usb2phy *rphy)
{
int ret;
/* Turn off differential receiver in suspend mode */
ret = regmap_write(rphy->grf, 0x298, 0x00040000);
if (ret)
return ret;
return 0;
}
static int rk3366_usb2phy_tuning(struct rockchip_usb2phy *rphy)
{
unsigned int open_pre_emphasize = 0xffff851f;
@@ -1970,6 +1982,7 @@ static const struct rockchip_usb2phy_cfg rk312x_phy_cfgs[] = {
{
.reg = 0x17c,
.num_ports = 2,
.phy_tuning = rk312x_usb2phy_tuning,
.clkout_ctl = { 0x0190, 15, 15, 1, 0 },
.port_cfgs = {
[USB2PHY_PORT_OTG] = {