This is a note to let you know that I've just added the patch titled
net: mdio: add helpers to extract clause 45 regad and devad fields
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mdio-add-helpers-to-extract-clause-45-regad-and-.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 66d469f51f4cb2e5700cb3872bfae0cdbe124b52
Author: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
Date: Tue Jan 4 12:07:00 2022 +0000
net: mdio: add helpers to extract clause 45 regad and devad fields
[ Upstream commit c6af53f038aa32cec12e8a305ba07c7ef168f1b0 ]
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: Daniel Golle <daniel@xxxxxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
Signed-off-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: 8851346912a1 ("net: stmmac: Assign configured channel value to EXTTS event")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 5e6dc38f418e4..3a6ff4e7284a8 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -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;
@@ -355,6 +357,16 @@ 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)
{
