Commit c6af53f0 authored by Russell King (Oracle)'s avatar Russell King (Oracle) Committed by David S. Miller
Browse files

net: mdio: add helpers to extract clause 45 regad and devad fields 



Add a couple of helpers and definitions to extract the clause 45 regad
and devad fields from the regnum passed into MDIO drivers.

Tested-by: default avatarDaniel Golle <daniel@makrotopia.org>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarDaniel Golle <daniel@makrotopia.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eda80b24

include/linux/mdio.h

+12 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
#define __LINUX_MDIO_H__



#include <uapi/linux/mdio.h>

#include <linux/bitfield.h>

#include <linux/mod_devicetable.h>



/* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit
@@ -14,6 +15,7 @@ 
 */

#define MII_ADDR_C45		(1<<30)

#define MII_DEVADDR_C45_SHIFT	16

#define MII_DEVADDR_C45_MASK	GENMASK(20, 16)

#define MII_REGADDR_C45_MASK	GENMASK(15, 0)



struct gpio_desc;
@@ -381,6 +383,16 @@ static inline u32 mdiobus_c45_addr(int devad, u16 regnum) 
	return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;

}



static inline u16 mdiobus_c45_regad(u32 regnum)

{

	return FIELD_GET(MII_REGADDR_C45_MASK, regnum);

}



static inline u16 mdiobus_c45_devad(u32 regnum)

{

	return FIELD_GET(MII_DEVADDR_C45_MASK, regnum);

}



static inline int __mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,

				     u16 regnum)

{