[PATCH AUTOSEL 6.1 07/17] net: dsa: b53: mmap: add phy ops

Sasha Levin
2023-04-06T11:33:32Z

From: Álvaro Fernández Rojas <noltari@gmail.com>

[ 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@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/dsa/b53/b53_mmap.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

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,
--
2.39.2