This wakeup setting can enable USB wakeup function even the controller's power is lost, and both A7 and M4 are in VLLS mode. Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx> --- Changes in v2: - no changes --- drivers/usb/phy/phy-mxs-usb.c | 41 +++++++++++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-) diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c index e172af75f602..acaae22df3ba 100644 --- a/drivers/usb/phy/phy-mxs-usb.c +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -118,6 +118,11 @@ #define BM_ANADIG_USB2_MISC_RX_VPIN_FS BIT(29) #define BM_ANADIG_USB2_MISC_RX_VMIN_FS BIT(28) +/* System Integration Module (SIM) Registers */ +#define SIM_GPR1 0x30 + +#define USB_PHY_VLLS_WAKEUP_EN BIT(0) + #define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) /* Do disconnection between PHY and controller without vbus */ @@ -214,6 +219,7 @@ struct mxs_phy { struct clk *clk; const struct mxs_phy_data *data; struct regmap *regmap_anatop; + struct regmap *regmap_sim; int port_id; u32 tx_reg_set; u32 tx_reg_mask; @@ -772,6 +778,17 @@ static int mxs_phy_probe(struct platform_device *pdev) } } + /* Currently, only imx7ulp has SIM module */ + if (of_get_property(np, "nxp,sim", NULL)) { + mxs_phy->regmap_sim = syscon_regmap_lookup_by_phandle + (np, "nxp,sim"); + if (IS_ERR(mxs_phy->regmap_sim)) { + dev_dbg(&pdev->dev, + "failed to find regmap for sim\n"); + return PTR_ERR(mxs_phy->regmap_sim); + } + } + /* Precompute which bits of the TX register are to be updated, if any */ if (!of_property_read_u32(np, "fsl,tx-cal-45-dn-ohms", &val) && val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) { @@ -849,6 +866,22 @@ static void mxs_phy_remove(struct platform_device *pdev) } #ifdef CONFIG_PM_SLEEP +static void mxs_phy_wakeup_enable(struct mxs_phy *mxs_phy, bool on) +{ + u32 mask = USB_PHY_VLLS_WAKEUP_EN; + + /* If the SoCs don't have SIM, quit */ + if (!mxs_phy->regmap_sim) + return; + + if (on) { + regmap_update_bits(mxs_phy->regmap_sim, SIM_GPR1, mask, mask); + udelay(500); + } else { + regmap_update_bits(mxs_phy->regmap_sim, SIM_GPR1, mask, 0); + } +} + 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; @@ -869,8 +902,10 @@ static int mxs_phy_system_suspend(struct device *dev) { struct mxs_phy *mxs_phy = dev_get_drvdata(dev); - if (device_may_wakeup(dev)) + if (device_may_wakeup(dev)) { mxs_phy_enable_ldo_in_suspend(mxs_phy, true); + mxs_phy_wakeup_enable(mxs_phy, true); + } return 0; } @@ -879,8 +914,10 @@ static int mxs_phy_system_resume(struct device *dev) { struct mxs_phy *mxs_phy = dev_get_drvdata(dev); - if (device_may_wakeup(dev)) + if (device_may_wakeup(dev)) { mxs_phy_enable_ldo_in_suspend(mxs_phy, false); + mxs_phy_wakeup_enable(mxs_phy, false); + } return 0; } -- 2.34.1