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Message-Id: <20230406113421.649149-5-sashal@kernel.org> Date: Thu, 6 Apr 2023 07:34:19 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Álvaro Fernández Rojas <noltari@...il.com>, Florian Fainelli <f.fainelli@...il.com>, "David S . Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org>, andrew@...n.ch, olteanv@...il.com, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 4.14 5/7] net: dsa: b53: mmap: add phy ops From: Álvaro Fernández Rojas <noltari@...il.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@...il.com> Acked-by: Florian Fainelli <f.fainelli@...il.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.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 ef63d24fef814..985eb0bbf7dbd 100644 --- a/drivers/net/dsa/b53/b53_mmap.c +++ b/drivers/net/dsa/b53/b53_mmap.c @@ -207,6 +207,18 @@ 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, @@ -218,6 +230,8 @@ 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(struct platform_device *pdev) -- 2.39.2
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