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charset="utf-8" Add cdns,usb2-disconnect-threshold-microvolt property to address fake USB disconnection issue during enumeration or suspend state for difference platform. Signed-off-by: Frank Li --- drivers/phy/cadence/phy-cadence-salvo.c | 29 +++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/phy/cadence/phy-cadence-salvo.c b/drivers/phy/cadence/= phy-cadence-salvo.c index 41616f786321..881e122f93c2 100644 --- a/drivers/phy/cadence/phy-cadence-salvo.c +++ b/drivers/phy/cadence/phy-cadence-salvo.c @@ -6,6 +6,7 @@ * Copyright (c) 2019-2020 NXP */ =20 +#include #include #include #include @@ -91,9 +92,19 @@ =20 /* USB2 PHY register definition */ #define UTMI_REG15 0xaf +#define UTMI_AFE_RX_REG0 0x0d #define UTMI_AFE_RX_REG5 0x12 #define UTMI_AFE_BC_REG4 0x29 =20 +/* Align UTMI_AFE_RX_REG0 bit[7:6] define */ +enum usb2_disconn_threshold { + USB2_DISCONN_THRESHOLD_575 =3D 0x0, + USB2_DISCONN_THRESHOLD_610 =3D 0x1, + USB2_DISCONN_THRESHOLD_645 =3D 0x3, +}; + +#define RX_USB2_DISCONN_MASK GENMASK(7, 6) + /* TB_ADDR_TX_RCVDETSC_CTRL */ #define RXDET_IN_P3_32KHZ BIT(0) /* @@ -125,6 +136,7 @@ struct cdns_salvo_phy { struct clk *clk; void __iomem *base; struct cdns_salvo_data *data; + enum usb2_disconn_threshold usb2_disconn; }; =20 static const struct of_device_id cdns_salvo_phy_of_match[]; @@ -261,6 +273,12 @@ static int cdns_salvo_phy_init(struct phy *phy) =20 cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG5, 0x5); + + value =3D cdns_salvo_read(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG0); + value &=3D ~RX_USB2_DISCONN_MASK; + value =3D FIELD_PREP(RX_USB2_DISCONN_MASK, salvo_phy->usb2_disconn); + cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG0, value); + udelay(10); =20 clk_disable_unprepare(salvo_phy->clk); @@ -315,6 +333,7 @@ static int cdns_salvo_phy_probe(struct platform_device = *pdev) struct device *dev =3D &pdev->dev; struct cdns_salvo_phy *salvo_phy; struct cdns_salvo_data *data; + u32 val; =20 data =3D (struct cdns_salvo_data *)of_device_get_match_data(dev); salvo_phy =3D devm_kzalloc(dev, sizeof(*salvo_phy), GFP_KERNEL); @@ -326,6 +345,16 @@ static int cdns_salvo_phy_probe(struct platform_device= *pdev) if (IS_ERR(salvo_phy->clk)) return PTR_ERR(salvo_phy->clk); =20 + if (of_property_read_u32(dev->of_node, "cdns,usb2-disconnect-threshold-mi= crovolt", &val)) + val =3D 575; + + if (val < 610) + salvo_phy->usb2_disconn =3D USB2_DISCONN_THRESHOLD_575; + else if (val < 645) + salvo_phy->usb2_disconn =3D USB2_DISCONN_THRESHOLD_610; + else + salvo_phy->usb2_disconn =3D USB2_DISCONN_THRESHOLD_645; + salvo_phy->base =3D devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(salvo_phy->base)) return PTR_ERR(salvo_phy->base); --=20 2.34.1