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net: mdiobus: add clause 45 mdiobus accessors

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There is a recurring pattern throughout some of the PHY code converting
a devad and regnum to our packed clause 45 representation. Rather than
having this scattered around the code, let's put a common translation
function in mdio.h, and provide some register accessors.

Convert the phylib core, phylink, bcm87xx and cortina to use these.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King
2020-05-26 16:29:36 +01:00
committed by David S. Miller
parent 8928e19ad8
commit 90ce665c6a
8 changed files with 52 additions and 36 deletions
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31
include/linux/mdio.h
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@@ -9,6 +9,13 @@
#include <uapi/linux/mdio.h>
#include <linux/mod_devicetable.h>
/* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit
* IEEE 802.3ae clause 45 addressing mode used by 10GIGE phy chips.
*/
#define MII_ADDR_C45 (1<<30)
#define MII_DEVADDR_C45_SHIFT 16
#define MII_REGADDR_C45_MASK GENMASK(15, 0)
struct gpio_desc;
struct mii_bus;
@@ -326,6 +333,30 @@ int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val);
int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
u16 set);
static inline u32 mdiobus_c45_addr(int devad, u16 regnum)
{
return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;
}
static inline int __mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
u16 regnum)
{
return __mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
}
static inline int __mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad,
u16 regnum, u16 val)
{
return __mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum),
val);
}
static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
u16 regnum)
{
return mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
}
int mdiobus_register_device(struct mdio_device *mdiodev);
int mdiobus_unregister_device(struct mdio_device *mdiodev);
bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);