Patch "net: dsa: b53: mmap: add phy ops" has been added to the 6.1-stable tree

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This is a note to let you know that I've just added the patch titled

    net: dsa: b53: mmap: add phy ops

to the 6.1-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-dsa-b53-mmap-add-phy-ops.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f3ba863ad6d11d19593156b8a45e8d266f5f77f5
Author: Álvaro Fernández Rojas <noltari@xxxxxxxxx>
Date:   Thu Mar 23 20:48:41 2023 +0100

    net: dsa: b53: mmap: add phy ops
    
    [ Upstream commit 45977e58ce65ed0459edc9a0466d9dfea09463f5 ]
    
    Implement phy_read16() and phy_write16() ops for B53 MMAP to avoid accessing
    B53_PORT_MII_PAGE registers which hangs the device.
    This access should be done through the MDIO Mux bus controller.
    
    Signed-off-by: Álvaro Fernández Rojas <noltari@xxxxxxxxx>
    Acked-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/dsa/b53/b53_mmap.c b/drivers/net/dsa/b53/b53_mmap.c
index 70887e0aece33..d9434ed9450df 100644
--- a/drivers/net/dsa/b53/b53_mmap.c
+++ b/drivers/net/dsa/b53/b53_mmap.c
@@ -216,6 +216,18 @@ static int b53_mmap_write64(struct b53_device *dev, u8 page, u8 reg,
 	return 0;
 }
 
+static int b53_mmap_phy_read16(struct b53_device *dev, int addr, int reg,
+			       u16 *value)
+{
+	return -EIO;
+}
+
+static int b53_mmap_phy_write16(struct b53_device *dev, int addr, int reg,
+				u16 value)
+{
+	return -EIO;
+}
+
 static const struct b53_io_ops b53_mmap_ops = {
 	.read8 = b53_mmap_read8,
 	.read16 = b53_mmap_read16,
@@ -227,6 +239,8 @@ static const struct b53_io_ops b53_mmap_ops = {
 	.write32 = b53_mmap_write32,
 	.write48 = b53_mmap_write48,
 	.write64 = b53_mmap_write64,
+	.phy_read16 = b53_mmap_phy_read16,
+	.phy_write16 = b53_mmap_phy_write16,
 };
 
 static int b53_mmap_probe_of(struct platform_device *pdev,



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