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phy: phy-rockchip-naneng-usb2: add low power function for rv1126

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By bypass charge detect module, about 140uA current can be saved
on USB_AVDD_1V8 power supply when suspend. Notice that bandgap
current can not be turned off, so there is still about 165uA
current.

This patch also remove the tuning in phy resuming, because the power
of phy is always on and registers does not need to be configured
again.

Change-Id: If13d3741e3b01289c1bd0294d6e6d88278c4654c
Signed-off-by: Jianing Ren <jianing.ren@rock-chips.com>
This commit is contained in:
Jianing Ren
2020-04-28 09:54:06 +08:00
committed by Tao Huang
parent 65b48186c4
commit d65989c056
1 changed files with 23 additions and 2 deletions
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25
drivers/phy/rockchip/phy-rockchip-naneng-usb2.c
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@@ -141,6 +141,7 @@ struct rockchip_usb2phy_port_cfg {
* @clks: array of input clocks
* @num_clks: number of input clocks.
* @phy_tuning: phy default parameters tuning.
* @phy_lowpower: phy low power mode.
* @clkout_ctl: keep on/turn off output clk of phy.
* @port_cfgs: ports register configuration, assigned by driver data.
* @chg_det: charger detection registers.
@@ -152,6 +153,7 @@ struct rockchip_usb2phy_cfg {
const struct clk_bulk_data *clks;
int num_clks;
int (*phy_tuning)(struct rockchip_usb2phy *rphy);
int (*phy_lowpower)(struct rockchip_usb2phy *rphy, bool en);
struct usb2phy_reg clkout_ctl;
const struct rockchip_usb2phy_port_cfg port_cfgs[USB2PHY_NUM_PORTS];
const struct rockchip_chg_det_reg chg_det;
@@ -1378,6 +1380,18 @@ out:
return ret;
}
static int rv1126_usb2phy_low_power(struct rockchip_usb2phy *rphy, bool en)
{
unsigned int reg;
reg = readl(rphy->base + 0x20);
/* bypass or enable bc detect */
reg = en ? reg | BIT(5) : reg & ~BIT(5);
writel(reg, rphy->base + 0x20);
return 0;
}
static const struct clk_bulk_data rv1126_clks[] = {
{ .id = "phyclk" },
{ .id = "pclk" },
@@ -1433,6 +1447,10 @@ static int rockchip_usb2phy_pm_suspend(struct device *dev)
enable_irq_wake(rport->ls_irq);
}
/* enter low power state */
if (rphy->phy_cfg->phy_lowpower)
ret = rphy->phy_cfg->phy_lowpower(rphy, true);
return ret;
}
@@ -1448,8 +1466,9 @@ static int rockchip_usb2phy_pm_resume(struct device *dev)
if (device_may_wakeup(rphy->dev))
wakeup_enable = true;
if (rphy->phy_cfg->phy_tuning)
ret = rphy->phy_cfg->phy_tuning(rphy);
/* exit low power state */
if (rphy->phy_cfg->phy_lowpower)
ret = rphy->phy_cfg->phy_lowpower(rphy, false);
for (index = 0; index < rphy->phy_cfg->num_ports; index++) {
rport = &rphy->ports[index];
@@ -1512,6 +1531,7 @@ static const struct rockchip_usb2phy_cfg rv1126_phy_cfgs[] = {
.reg = 0xff4c0000,
.num_ports = 1,
.phy_tuning = rv1126_usb2phy_tuning,
.phy_lowpower = rv1126_usb2phy_low_power,
.num_clks = 2,
.clks = rv1126_clks,
.clkout_ctl = { 0x10230, 14, 14, 0, 1 },
@@ -1557,6 +1577,7 @@ static const struct rockchip_usb2phy_cfg rv1126_phy_cfgs[] = {
.reg = 0xff4c8000,
.num_ports = 1,
.phy_tuning = rv1126_usb2phy_tuning,
.phy_lowpower = rv1126_usb2phy_low_power,
.num_clks = 2,
.clks = rv1126_clks,
.clkout_ctl = { 0x10238, 9, 9, 0, 1 },