[bug report] USB: PHY: JZ4770: Add support for new Ingenic SoCs.

[<dan.carpenter@oracle.com>]

Hello 周琰杰 (Zhou Yanjie),

The patch 2a6c0b82e651: "USB: PHY: JZ4770: Add support for new
Ingenic SoCs." from Jul 23, 2020, leads to the following static
checker warning:

	drivers/usb/phy/phy-jz4770.c:179 ingenic_usb_phy_init()
	error: uninitialized symbol 'reg'.

drivers/usb/phy/phy-jz4770.c
   157  static int ingenic_usb_phy_init(struct usb_phy *phy)
   158  {
   159          struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
   160          int err;
   161          u32 reg;
                    ^^^
   162  
   163          err = regulator_enable(priv->vcc_supply);
   164          if (err) {
   165                  dev_err(priv->dev, "Unable to enable VCC: %d\n", err);
   166                  return err;
   167          }
   168  
   169          err = clk_prepare_enable(priv->clk);
   170          if (err) {
   171                  dev_err(priv->dev, "Unable to start clock: %d\n", err);
   172                  return err;
   173          }
   174  
   175          priv->soc_info->usb_phy_init(phy);
   176  
   177          /* Wait for PHY to reset */
   178          usleep_range(30, 300);
   179          writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
                       ^^^
Not initialized any more.

   180          usleep_range(300, 1000);
   181  
   182          return 0;
   183  }

regards,
dan carpenter