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usb: phy: mxs: Add system suspend/resume API

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We need this to keep PHY's power on or off during the system
suspend mode. If we need to enable USB wakeup, then we
must keep PHY's power being on during the system suspend mode.
Otherwise, we need to keep PHY's power being off to save power.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Peter Chen 2014-02-24 10:21:03 +08:00 committed by Felipe Balbi
parent 3f1265056b
commit bf78343800
1 changed files with 61 additions and 0 deletions
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61
drivers/usb/phy/phy-mxs-usb.c
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@ -57,6 +57,10 @@
#define BM_USBPHY_DEBUG_CLKGATE BIT(30)
/* Anatop Registers */
#define ANADIG_ANA_MISC0 0x150
#define ANADIG_ANA_MISC0_SET 0x154
#define ANADIG_ANA_MISC0_CLR 0x158
#define ANADIG_USB1_VBUS_DET_STAT 0x1c0
#define ANADIG_USB2_VBUS_DET_STAT 0x220
@ -65,6 +69,9 @@
#define ANADIG_USB2_LOOPBACK_SET 0x244
#define ANADIG_USB2_LOOPBACK_CLR 0x248
#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG BIT(12)
#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL BIT(11)
#define BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3)
#define BM_ANADIG_USB2_VBUS_DET_STAT_VBUS_VALID BIT(3)
@ -134,6 +141,16 @@ struct mxs_phy {
int port_id;
};
static inline bool is_imx6q_phy(struct mxs_phy *mxs_phy)
{
return mxs_phy->data == &imx6q_phy_data;
}
static inline bool is_imx6sl_phy(struct mxs_phy *mxs_phy)
{
return mxs_phy->data == &imx6sl_phy_data;
}
static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)
{
int ret;
@ -387,6 +404,8 @@ static int mxs_phy_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mxs_phy);
device_set_wakeup_capable(&pdev->dev, true);
ret = usb_add_phy_dev(&mxs_phy->phy);
if (ret)
return ret;
@ -403,6 +422,47 @@ static int mxs_phy_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on)
{
unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR;
/* If the SoCs don't have anatop, quit */
if (!mxs_phy->regmap_anatop)
return;
if (is_imx6q_phy(mxs_phy))
regmap_write(mxs_phy->regmap_anatop, reg,
BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG);
else if (is_imx6sl_phy(mxs_phy))
regmap_write(mxs_phy->regmap_anatop,
reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL);
}
static int mxs_phy_system_suspend(struct device *dev)
{
struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
mxs_phy_enable_ldo_in_suspend(mxs_phy, true);
return 0;
}
static int mxs_phy_system_resume(struct device *dev)
{
struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
mxs_phy_enable_ldo_in_suspend(mxs_phy, false);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(mxs_phy_pm, mxs_phy_system_suspend,
mxs_phy_system_resume);
static struct platform_driver mxs_phy_driver = {
.probe = mxs_phy_probe,
.remove = mxs_phy_remove,
@ -410,6 +470,7 @@ static struct platform_driver mxs_phy_driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = mxs_phy_dt_ids,
.pm = &mxs_phy_pm,
},
};