linux-stable.git/drivers/net/mdio, branch linux-rolling-stable Linux kernel stable tree net: mdio: select REGMAP_MMIO instead of depending on it 2026-07-24T14:20:44+00:00 Rosen Penev rosenp@gmail.com 2026-07-02T03:26:52+00:00 e3d1ca7882a529a90ccbe6c9e2c7bd8d92caf84f [ Upstream commit 1a3267a8c9ecabb8e27f5cbda6d19295d5e41beb ] REGMAP_MMIO is a hidden (non-user-visible) tristate symbol. Using depends on it is incorrect because there is no way for the user to enable it directly. Change to select, which is the convention used by every other driver in the tree that needs REGMAP_MMIO. Fixes: 8057cbb8335c ("net: mdio: mscc-miim: Add depend of REGMAP_MMIO on MDIO_MSCC_MIIM") Assisted-by: opencode:big-pickle Signed-off-by: Rosen Penev <rosenp@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260702032653.1580616-1-rosenp@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 1a3267a8c9ecabb8e27f5cbda6d19295d5e41beb ]

REGMAP_MMIO is a hidden (non-user-visible) tristate symbol. Using
depends on it is incorrect because there is no way for the user to
enable it directly. Change to select, which is the convention used
by every other driver in the tree that needs REGMAP_MMIO.

Fixes: 8057cbb8335c ("net: mdio: mscc-miim: Add depend of REGMAP_MMIO on MDIO_MSCC_MIIM")
Assisted-by: opencode:big-pickle
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260702032653.1580616-1-rosenp@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
net: mdio: MDIO_PIC64HPSC should depend on ARCH_MICROCHIP 2026-04-17T02:04:58+00:00 Geert Uytterhoeven geert+renesas@glider.be 2026-04-14T10:30:47+00:00 1e9e7fd839b7f22b46762059c6f3e576b3e6e179 The PIC64-HPSC/HX MDIO interface is only present on Microchip PIC64-HPSC/HX SoCs. Hence add a dependency on ARCH_MICROCHIP, to prevent asking the user about this driver when configuring a kernel without Microchip SoC support. Fixes: f76aef980206e7c6 ("net: mdio: add a driver for PIC64-HPSC/HX MDIO controller") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Charles Perry <charles.perry@microchip.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/980c57efa5843733ef95459c3283aebade56f142.1776162544.git.geert+renesas@glider.be Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
The PIC64-HPSC/HX MDIO interface is only present on Microchip
PIC64-HPSC/HX SoCs.  Hence add a dependency on ARCH_MICROCHIP, to
prevent asking the user about this driver when configuring a kernel
without Microchip SoC support.

Fixes: f76aef980206e7c6 ("net: mdio: add a driver for PIC64-HPSC/HX MDIO controller")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Charles Perry <charles.perry@microchip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/980c57efa5843733ef95459c3283aebade56f142.1776162544.git.geert+renesas@glider.be
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net: mdio: add a driver for PIC64-HPSC/HX MDIO controller 2026-04-12T21:19:19+00:00 Charles Perry charles.perry@microchip.com 2026-04-08T13:18:15+00:00 f76aef980206e7c6bc09933fd3c8e2b8a3479bd2 This adds an MDIO driver for PIC64-HPSC/HX. The hardware supports C22 and C45 but only C22 is implemented in this commit. This MDIO hardware is based on a Microsemi design supported in Linux by mdio-mscc-miim.c. However, The register interface is completely different with pic64hpsc, hence the need for a separate driver. The documentation recommends an input clock of 156.25MHz and a prescaler of 39, which yields an MDIO clock of 1.95MHz. The hardware supports an interrupt pin or a "TRIGGER" bit that can be polled to signal transaction completion. This commit uses polling. This was tested on Microchip HB1301 evalkit with a VSC8574 and a VSC8541. Signed-off-by: Charles Perry <charles.perry@microchip.com> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260408131821.1145334-3-charles.perry@microchip.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
This adds an MDIO driver for PIC64-HPSC/HX. The hardware supports C22
and C45 but only C22 is implemented in this commit.

This MDIO hardware is based on a Microsemi design supported in Linux by
mdio-mscc-miim.c. However, The register interface is completely
different with pic64hpsc, hence the need for a separate driver.

The documentation recommends an input clock of 156.25MHz and a prescaler
of 39, which yields an MDIO clock of 1.95MHz.

The hardware supports an interrupt pin or a "TRIGGER" bit that can be
polled to signal transaction completion. This commit uses polling.

This was tested on Microchip HB1301 evalkit with a VSC8574 and a
VSC8541.

Signed-off-by: Charles Perry <charles.perry@microchip.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260408131821.1145334-3-charles.perry@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-04-09T20:20:59+00:00 Jakub Kicinski kuba@kernel.org 2026-04-02T17:57:09+00:00 b6e39e48469e37057fce27a1b87cf6d3e456aa42 Cross-merge networking fixes after downstream PR (net-7.0-rc8). Conflicts: net/ipv6/seg6_iptunnel.c c3812651b522f ("seg6: separate dst_cache for input and output paths in seg6 lwtunnel") 78723a62b969a ("seg6: add per-route tunnel source address") https://lore.kernel.org/adZhwtOYfo-0ImSa@sirena.org.uk net/ipv4/icmp.c fde29fd934932 ("ipv4: icmp: fix null-ptr-deref in icmp_build_probe()") d98adfbdd5c01 ("ipv4: drop ipv6_stub usage and use direct function calls") https://lore.kernel.org/adO3dccqnr6j-BL9@sirena.org.uk Adjacent changes: drivers/net/ethernet/stmicro/stmmac/chain_mode.c 51f4e090b9f8 ("net: stmmac: fix integer underflow in chain mode") 6b4286e05508 ("net: stmmac: rename STMMAC_GET_ENTRY() -> STMMAC_NEXT_ENTRY()") Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
Cross-merge networking fixes after downstream PR (net-7.0-rc8).

Conflicts:

net/ipv6/seg6_iptunnel.c
  c3812651b522f ("seg6: separate dst_cache for input and output paths in seg6 lwtunnel")
  78723a62b969a ("seg6: add per-route tunnel source address")
https://lore.kernel.org/adZhwtOYfo-0ImSa@sirena.org.uk

net/ipv4/icmp.c
  fde29fd934932 ("ipv4: icmp: fix null-ptr-deref in icmp_build_probe()")
  d98adfbdd5c01 ("ipv4: drop ipv6_stub usage and use direct function calls")
https://lore.kernel.org/adO3dccqnr6j-BL9@sirena.org.uk

Adjacent changes:

drivers/net/ethernet/stmicro/stmmac/chain_mode.c
  51f4e090b9f8 ("net: stmmac: fix integer underflow in chain mode")
  6b4286e05508 ("net: stmmac: rename STMMAC_GET_ENTRY() -> STMMAC_NEXT_ENTRY()")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net: mdio: realtek-rtl9300: use scoped device_for_each_child_node loop 2026-04-09T01:42:08+00:00 Felix Gu ustc.gu@gmail.com 2026-04-05T06:51:52+00:00 c09ea768bdb975e828f8e17293c397c3d14ad85d Switch to device_for_each_child_node_scoped() to auto-release fwnode references on early exit. Fixes: 24e31e474769 ("net: mdio: Add RTL9300 MDIO driver") Signed-off-by: Felix Gu <ustc.gu@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20260405-rtl9300-v1-1-08e4499cf944@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
Switch to device_for_each_child_node_scoped() to auto-release fwnode
references on early exit.

Fixes: 24e31e474769 ("net: mdio: Add RTL9300 MDIO driver")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260405-rtl9300-v1-1-08e4499cf944@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net: mdio-gpio: remove linux/platform_data/mdio-gpio.h 2026-03-19T01:29:57+00:00 Bartosz Golaszewski bartosz.golaszewski@oss.qualcomm.com 2026-03-16T10:04:04+00:00 356d4fbcf3defaff0f98d2b6b54f3b26f0ff189d Nobody defines struct mdio_gpio_platform_data. Remove platform data support from mdio-gpio and drop the header. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260316-gpio-mdio-hdr-cleanup-v1-2-2df696f74728@oss.qualcomm.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
Nobody defines struct mdio_gpio_platform_data. Remove platform data
support from mdio-gpio and drop the header.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260316-gpio-mdio-hdr-cleanup-v1-2-2df696f74728@oss.qualcomm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net: mdio-gpio: remove linux/mdio-gpio.h 2026-03-19T01:29:57+00:00 Bartosz Golaszewski bartosz.golaszewski@oss.qualcomm.com 2026-03-16T10:04:03+00:00 9c6b4009da5991db6bf02a47a578885a04a5e3f6 The three defines from the linux/mdio-gpio.h header are only used in the mdio-gpio module. There's no reason to have them in a public header. Move them into the driver and remove mdio-gpio.h. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260316-gpio-mdio-hdr-cleanup-v1-1-2df696f74728@oss.qualcomm.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
The three defines from the linux/mdio-gpio.h header are only used in the
mdio-gpio module. There's no reason to have them in a public header.
Move them into the driver and remove mdio-gpio.h.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260316-gpio-mdio-hdr-cleanup-v1-1-2df696f74728@oss.qualcomm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net: mdio: remove selecting FIXED_PHY for FWNODE_MDIO 2026-03-14T17:42:16+00:00 Heiner Kallweit hkallweit1@gmail.com 2026-03-11T20:54:46+00:00 b87249aab4c0cbc8d9e4e745dcd1cb45ca29b8bd Fwnode MDIO has never used the fixed PHY code, therefore don't select symbol FIXED_PHY. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Link: https://patch.msgid.link/880ca62b-a5d3-4865-bbce-2d2210928239@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
Fwnode MDIO has never used the fixed PHY code, therefore don't select
symbol FIXED_PHY.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/880ca62b-a5d3-4865-bbce-2d2210928239@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net: mdio: mvusb: drop redundant device reference 2026-03-11T02:53:19+00:00 Johan Hovold johan@kernel.org 2026-03-09T08:26:41+00:00 1a6ca6497a40f5c7795575a35f0da7d013b79bdd Driver core holds a reference to the USB interface and its parent USB device while the interface is bound to a driver and there is no need to take additional references unless the structures are needed after disconnect. Drop the redundant device reference to reduce cargo culting, make it easier to spot drivers where an extra reference is needed, and reduce the risk of memory leaks when drivers fail to release it. Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260309082641.15574-1-johan@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
Driver core holds a reference to the USB interface and its parent USB
device while the interface is bound to a driver and there is no need to
take additional references unless the structures are needed after
disconnect.

Drop the redundant device reference to reduce cargo culting, make it
easier to spot drivers where an extra reference is needed, and reduce
the risk of memory leaks when drivers fail to release it.

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260309082641.15574-1-johan@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net: mdio: xgene: Fix misleading err message in xgene mdio read 2026-03-06T02:32:01+00:00 Alok Tiwari alok.a.tiwari@oracle.com 2026-03-04T19:57:36+00:00 54f5a89da9e083322a0af171126020d509593414 xgene_xfi_mdio_read() prints "write failed" when the MDIO management interface remains busy and the read times out. Update the message to "read failed" to match the operation. Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Link: https://patch.msgid.link/20260304195755.2468204-1-alok.a.tiwari@oracle.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> 
xgene_xfi_mdio_read() prints "write failed" when the MDIO management
interface remains busy and the read times out. Update the message to
"read failed" to match the operation.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/20260304195755.2468204-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>