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Commit 5b4e2900 authored by Jon Mason's avatar Jon Mason Committed by David S. Miller
Browse files

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: default avatarJon Mason <jon.mason@broadcom.com>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 94edc86b

drivers/net/phy/broadcom.c

+10 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/brcmphy.h

+1 −0
Original line number Diff line number Diff line
@@ -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