On 22-09-20, 00:24, 周琰杰 (Zhou Yanjie) wrote: > +#define USBPCR_IDPULLUP_LSB 28 > +#define USBPCR_IDPULLUP_MASK GENMASK(29, USBPCR_IDPULLUP_LSB) > +#define USBPCR_IDPULLUP_ALWAYS (0x2 << USBPCR_IDPULLUP_LSB) > +#define USBPCR_IDPULLUP_SUSPEND (0x1 << USBPCR_IDPULLUP_LSB) > +#define USBPCR_IDPULLUP_OTG (0x0 << USBPCR_IDPULLUP_LSB) why not define these as 0, 1, 2 and then use FIELD_PREP(value, USBPCR_IDPULLUP_MASK), please do this for rest as well. > +static int ingenic_usb_phy_set_mode(struct phy *phy, > + enum phy_mode mode, int submode) > +{ > + struct ingenic_usb_phy *priv = phy_get_drvdata(phy); > + u32 reg; > + > + switch (mode) { > + case PHY_MODE_USB_HOST: > + reg = readl(priv->base + REG_USBPCR_OFFSET); > + reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE); use u32_encode_bits or u32p_replace_bit to program registers using mask defined -- ~Vinod