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- From: Jon Mason <jon.mason@broadcom.com>
- Date: Fri, 4 Nov 2016 01:10:56 -0400
- Subject: [PATCH] net: phy: broadcom: add bcm54xx_auxctl_read
- Add a helper function to read the AUXCTL register for the BCM54xx. This
- mirrors the bcm54xx_auxctl_write function already present in the code.
- Signed-off-by: Jon Mason <jon.mason@broadcom.com>
- Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
- Signed-off-by: David S. Miller <davem@davemloft.net>
- ---
- --- a/drivers/net/phy/broadcom.c
- +++ b/drivers/net/phy/broadcom.c
- @@ -30,6 +30,16 @@ MODULE_DESCRIPTION("Broadcom PHY driver"
- MODULE_AUTHOR("Maciej W. Rozycki");
- MODULE_LICENSE("GPL");
-
- +static int bcm54xx_auxctl_read(struct phy_device *phydev, u16 regnum)
- +{
- + /* The register must be written to both the Shadow Register Select and
- + * the Shadow Read Register Selector
- + */
- + phy_write(phydev, MII_BCM54XX_AUX_CTL, regnum |
- + regnum << MII_BCM54XX_AUXCTL_SHDWSEL_READ_SHIFT);
- + return phy_read(phydev, MII_BCM54XX_AUX_CTL);
- +}
- +
- static int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
- {
- return phy_write(phydev, MII_BCM54XX_AUX_CTL, regnum | val);
- --- a/include/linux/brcmphy.h
- +++ b/include/linux/brcmphy.h
- @@ -110,6 +110,7 @@
- #define MII_BCM54XX_AUXCTL_MISC_FORCE_AMDIX 0x0200
- #define MII_BCM54XX_AUXCTL_MISC_RDSEL_MISC 0x7000
- #define MII_BCM54XX_AUXCTL_SHDWSEL_MISC 0x0007
- +#define MII_BCM54XX_AUXCTL_SHDWSEL_READ_SHIFT 12
-
- #define MII_BCM54XX_AUXCTL_SHDWSEL_MASK 0x0007
-
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