[PATCH net-next 00/15] Probe SJA1105 DSA children using MFD and dynamic OF nodes

[PATCH net-next 00/15] Probe SJA1105 DSA children using MFD and dynamic OF nodes

[Vladimir Oltean]

This series prepares the SJA1105 driver for a goal covered in upcoming
patches: customize the XPCS with extra device tree properties for board
specific settings (specifically lane polarity).

The XPCS handles conversion of internal parallel Ethernet MAC data onto
a SGMII serial interface. This block can be memory-mapped or it can be
accessed over MDIO. Its driver (drivers/net/pcs/pcs-xpcs.c) always
expects it to be on an MDIO bus, so if memory-mapped, the code creates a
fake MDIO bus whose reads and writes go to the memory addresses. Note
that in the case of the SPI-controlled SJA1105 switches, memory-mapped
means accessible through the same device-specific SPI transfer protocol
that reads and writes any other switch register.

The status at present date in this DSA driver is that the XPCS is
implicitly created and used by the driver despite not described in the
device tree at all. The code which creates a fake MDIO bus for the XPCS
is itself a subset of the more general logic implemented in
drivers/net/pcs/pcs-xpcs-plat.c, and the latter already has DT bindings.

So we have to modify SJA1105's DT schema to allow XPCS children, and
modify the XPCS schema to allow SJA1105 compatibles (patch 12/15).

To retain compatibility with XPCS not being described in the device, we
use the dynamic OF API to create implicit XPCS nodes based on resources
hardcoded in the driver, when those nodes are missing (patch 13/15).

To probe the XPCS platform driver using its standard bindings but
adapted to sitting behind a SPI bus, the former needs to be converted
to regmap, as done in patch 11/15, and also needs to be aware of its
specific compatible string (patch 10/15). The SJA1105 also has to
provide a regmap for its child, in patch 05/15.

We use the MFD framework to probe the XPCS children. Actually, the XPCS
bindings want "reg" to denote the base address in the switch address
space, and the DSA ethernet-switch root node is not structured to be
able to provide that (other children need #address-cells = <0>). So we
create an intermediary "regs" node between the top-level ethernet-switch
node and the new ethernet-pcs node. This solves the device tree
hierarchy issue but results in the need for patch 07/15.

To use the MFD framework for XPCS, the SJA1105 driver must be decoupled
with it, interacting only through standard interfaces rather than
accessing it directly. Patch 01/15 replaces sja1105_static_config_reload()
interaction with generic phylink helpers for replaying link events after
a reset. Patch 10/15 and 15/15 obtain a simple phylink_pcs reference in
the SJA1105 driver based on the standard 'pcs-handle' device tree
property (phandle).

The work to use MFD for XPCS triggered a chain reaction where the other
MDIO buses implemented in the SJA1105 driver were also migrated to
standalone drivers and probed using MFD. This is the topic of patches
03/15, 04/15 and 08/15. This helps increase the separation of concerns
and makes the SJA1105 DSA driver more focused on switching stuff.

The rest (patches 02/15, 06/15, 09/15) are minor "glue" changes.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Herve Codina <herve.codina@bootlin.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Maxime Chevallier <maxime.chevallier@bootlin.com>
Cc: Lee Jones <lee@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org

Vladimir Oltean (15):
  net: dsa: sja1105: let phylink help with the replay of link callbacks
  net: mdio-regmap: permit working with non-MMIO regmaps
  net: mdio: add driver for NXP SJA1110 100BASE-T1 embedded PHYs
  net: mdio: add generic driver for NXP SJA1110 100BASE-TX embedded PHYs
  net: dsa: sja1105: prepare regmap for passing to child devices
  net: dsa: sja1105: include spi.h from sja1105.h
  mfd: core: add ability for cells to probe on a custom parent OF node
  net: dsa: sja1105: transition OF-based MDIO drivers to standalone
  net: dsa: sja1105: remove sja1105_mdio_private
  net: pcs: xpcs: introduce xpcs_create_pcs_fwnode()
  net: pcs: xpcs-plat: convert to regmap
  dt-bindings: net: dsa: sja1105: document the PCS nodes
  net: pcs: xpcs-plat: add NXP SJA1105/SJA1110 support
  net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver
  net: dsa: sja1105: permit finding the XPCS via pcs-handle

 .../bindings/net/dsa/nxp,sja1105.yaml         |  28 +
 .../bindings/net/pcs/snps,dw-xpcs.yaml        |   8 +
 MAINTAINERS                                   |   2 +
 drivers/mfd/mfd-core.c                        |  11 +-
 drivers/net/dsa/sja1105/Kconfig               |   2 +
 drivers/net/dsa/sja1105/Makefile              |   2 +-
 drivers/net/dsa/sja1105/sja1105.h             |  42 +-
 drivers/net/dsa/sja1105/sja1105_main.c        | 169 +++---
 drivers/net/dsa/sja1105/sja1105_mdio.c        | 507 ------------------
 drivers/net/dsa/sja1105/sja1105_mfd.c         | 293 ++++++++++
 drivers/net/dsa/sja1105/sja1105_mfd.h         |  11 +
 drivers/net/dsa/sja1105/sja1105_spi.c         | 113 +++-
 drivers/net/mdio/Kconfig                      |  21 +-
 drivers/net/mdio/Makefile                     |   2 +
 drivers/net/mdio/mdio-regmap-simple.c         |  77 +++
 drivers/net/mdio/mdio-regmap.c                |   7 +-
 drivers/net/mdio/mdio-sja1110-cbt1.c          | 173 ++++++
 drivers/net/pcs/pcs-xpcs-plat.c               | 146 +++--
 drivers/net/pcs/pcs-xpcs.c                    |  12 +
 drivers/net/phy/phylink.c                     |  75 ++-
 include/linux/mdio/mdio-regmap.h              |   2 +
 include/linux/mfd/core.h                      |   7 +
 include/linux/pcs/pcs-xpcs.h                  |   1 +
 include/linux/phylink.h                       |   5 +
 24 files changed, 1033 insertions(+), 683 deletions(-)
 delete mode 100644 drivers/net/dsa/sja1105/sja1105_mdio.c
 create mode 100644 drivers/net/dsa/sja1105/sja1105_mfd.c
 create mode 100644 drivers/net/dsa/sja1105/sja1105_mfd.h
 create mode 100644 drivers/net/mdio/mdio-regmap-simple.c
 create mode 100644 drivers/net/mdio/mdio-sja1110-cbt1.c

-- 
2.34.1

[PATCH net-next 12/15] dt-bindings: net: dsa: sja1105: document the PCS nodes

[Vladimir Oltean]

The XPCS blocks in NXP SJA1105 and SJA1110 may be described in the
device tree, and they follow the same bindings as the other instances
which are memory-mapped using an APB3 or MCI interface.

Document their compatible string, positioning in the switch's "regs"
subnode, and the pcs-handle to them.

The "type: object" addition in the ethernet-port node is to suppress
a dt_binding_check warning that states "node schemas must have a type
or $ref". This is fine, but I don't completely understand why it started
being required just now (apparently, the presence of "properties" under
the port node affects this).

Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 .../bindings/net/dsa/nxp,sja1105.yaml         | 28 +++++++++++++++++++
 .../bindings/net/pcs/snps,dw-xpcs.yaml        |  8 ++++++
 2 files changed, 36 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
index 607b7fe8d28e..ee1a95d6b032 100644
--- a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
@@ -85,11 +85,31 @@ properties:
           - compatible
           - reg
 
+  regs:
+    type: object
+    description:
+      Optional container node for peripherals in the switch address space other
+      than the switching IP itself. This node and its children only need to be
+      described if board-specific properties need to be specified, like SerDes
+      lane polarity inversion. If absent, default descriptions are used.
+    additionalProperties: false
+
+    properties:
+      '#address-cells':
+        const: 1
+      '#size-cells':
+        const: 1
+
+    patternProperties:
+      "^ethernet-pcs@[0-9a-f]+$":
+        $ref: /schemas/net/pcs/snps,dw-xpcs.yaml#
+
 patternProperties:
   "^(ethernet-)?ports$":
     additionalProperties: true
     patternProperties:
       "^(ethernet-)?port@[0-9]$":
+        type: object
         allOf:
           - if:
               properties:
@@ -107,6 +127,14 @@ patternProperties:
                 tx-internal-delay-ps:
                   $ref: "#/$defs/internal-delay-ps"
 
+        properties:
+          pcs-handle:
+            $ref: /schemas/types.yaml#/definitions/phandle
+            description:
+              Phandle to a PCS device node from the "regs" container.
+              Can be skipped if the PCS description is missing - in that case,
+              the connection is implicit.
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml b/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
index e77eec9ac9ee..46e4f611f714 100644
--- a/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
+++ b/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
@@ -25,6 +25,14 @@ description:
 properties:
   compatible:
     oneOf:
+      - description:
+          Synopsys DesignWare XPCS in NXP SJA1105 switch (direct APB3 access
+          via SPI) with custom PMA
+        const: nxp,sja1105-pcs
+      - description:
+          Synopsys DesignWare XPCS in NXP SJA1110 switch (indirect APB3 access
+          via SPI) with custom PMA
+        const: nxp,sja1110-pcs
       - description: Synopsys DesignWare XPCS with none or unknown PMA
         const: snps,dw-xpcs
       - description: Synopsys DesignWare XPCS with Consumer Gen1 3G PMA
-- 
2.34.1

Re: [PATCH net-next 12/15] dt-bindings: net: dsa: sja1105: document the PCS nodes

[Rob Herring]

On Tue, Nov 18, 2025 at 09:05:27PM +0200, Vladimir Oltean wrote:
> The XPCS blocks in NXP SJA1105 and SJA1110 may be described in the
> device tree, and they follow the same bindings as the other instances
> which are memory-mapped using an APB3 or MCI interface.
> 
> Document their compatible string, positioning in the switch's "regs"
> subnode, and the pcs-handle to them.
> 
> The "type: object" addition in the ethernet-port node is to suppress
> a dt_binding_check warning that states "node schemas must have a type
> or $ref". This is fine, but I don't completely understand why it started
> being required just now (apparently, the presence of "properties" under
> the port node affects this).

Yes. It's related to quirks in how json-schema works. You would think 
'properties' would require the instance to be an object, but no, such a 
schema defining properties would pass even for a boolean property. So 
requiring 'type: object' is necessary. In this case, we already do that 
elsewhere so it's not strictly needed here, but figuring that out is 
complicated.

> Cc: Rob Herring <robh@kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
> ---
>  .../bindings/net/dsa/nxp,sja1105.yaml         | 28 +++++++++++++++++++
>  .../bindings/net/pcs/snps,dw-xpcs.yaml        |  8 ++++++
>  2 files changed, 36 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
> index 607b7fe8d28e..ee1a95d6b032 100644
> --- a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
> @@ -85,11 +85,31 @@ properties:
>            - compatible
>            - reg
>  
> +  regs:
> +    type: object
> +    description:
> +      Optional container node for peripherals in the switch address space other
> +      than the switching IP itself. This node and its children only need to be
> +      described if board-specific properties need to be specified, like SerDes
> +      lane polarity inversion. If absent, default descriptions are used.
> +    additionalProperties: false
> +
> +    properties:
> +      '#address-cells':
> +        const: 1
> +      '#size-cells':
> +        const: 1
> +
> +    patternProperties:
> +      "^ethernet-pcs@[0-9a-f]+$":
> +        $ref: /schemas/net/pcs/snps,dw-xpcs.yaml#
> +
>  patternProperties:
>    "^(ethernet-)?ports$":
>      additionalProperties: true
>      patternProperties:
>        "^(ethernet-)?port@[0-9]$":
> +        type: object
>          allOf:
>            - if:
>                properties:
> @@ -107,6 +127,14 @@ patternProperties:
>                  tx-internal-delay-ps:
>                    $ref: "#/$defs/internal-delay-ps"
>  
> +        properties:
> +          pcs-handle:
> +            $ref: /schemas/types.yaml#/definitions/phandle

This already has a type, so drop the $ref.

> +            description:
> +              Phandle to a PCS device node from the "regs" container.
> +              Can be skipped if the PCS description is missing - in that case,
> +              the connection is implicit.
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml b/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
> index e77eec9ac9ee..46e4f611f714 100644
> --- a/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
> +++ b/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
> @@ -25,6 +25,14 @@ description:
>  properties:
>    compatible:
>      oneOf:
> +      - description:
> +          Synopsys DesignWare XPCS in NXP SJA1105 switch (direct APB3 access
> +          via SPI) with custom PMA
> +        const: nxp,sja1105-pcs
> +      - description:
> +          Synopsys DesignWare XPCS in NXP SJA1110 switch (indirect APB3 access
> +          via SPI) with custom PMA
> +        const: nxp,sja1110-pcs
>        - description: Synopsys DesignWare XPCS with none or unknown PMA
>          const: snps,dw-xpcs
>        - description: Synopsys DesignWare XPCS with Consumer Gen1 3G PMA
> -- 
> 2.34.1
> 

[PATCH net-next 13/15] net: pcs: xpcs-plat: add NXP SJA1105/SJA1110 support

[Vladimir Oltean]

The XPCS in these NXP switches returns 0 when reading the ID registers,
and is integrated with a custom PMA.

The current way to support it is with hijacked PHYID register reads
in sja1105_pcs_mdio_read_c45(), to fake that it returns
NXP_SJA1105_XPCS_ID.

The new way to support it is with a specific compatible string. This
makes the platform XPCS driver use a specific struct dw_xpcs_info which
it assigns to mdiodev->dev.platform_data, and from there, xpcs_init_id()
picks it up and uses it. Later, xpcs_identify() doesn't overwrite the
xpcs->info.pcs and xpcs->info.pma unless they are set to
DW_XPCS_ID_NATIVE and DW_XPCS_PMA_ID_NATIVE, aka zeroes.

Since what is custom is the PMA and not the PCS, a later patch will
probably have to move the NXP constants around. But that should be done
only after this becomes strictly XPCS internal business.

Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/pcs/pcs-xpcs-plat.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/pcs/pcs-xpcs-plat.c b/drivers/net/pcs/pcs-xpcs-plat.c
index ea6482aa8431..f96eaafb6376 100644
--- a/drivers/net/pcs/pcs-xpcs-plat.c
+++ b/drivers/net/pcs/pcs-xpcs-plat.c
@@ -479,6 +479,8 @@ DW_XPCS_INFO_DECLARE(xpcs_pma_gen4_3g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN4_3G_ID
 DW_XPCS_INFO_DECLARE(xpcs_pma_gen4_6g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN4_6G_ID);
 DW_XPCS_INFO_DECLARE(xpcs_pma_gen5_10g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN5_10G_ID);
 DW_XPCS_INFO_DECLARE(xpcs_pma_gen5_12g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN5_12G_ID);
+DW_XPCS_INFO_DECLARE(xpcs_sja1105, NXP_SJA1105_XPCS_ID, DW_XPCS_PMA_ID_NATIVE);
+DW_XPCS_INFO_DECLARE(xpcs_sja1110, NXP_SJA1110_XPCS_ID, DW_XPCS_PMA_ID_NATIVE);
 
 static const struct of_device_id xpcs_of_ids[] = {
 	{ .compatible = "snps,dw-xpcs", .data = &xpcs_generic },
@@ -489,6 +491,8 @@ static const struct of_device_id xpcs_of_ids[] = {
 	{ .compatible = "snps,dw-xpcs-gen4-6g", .data = &xpcs_pma_gen4_6g },
 	{ .compatible = "snps,dw-xpcs-gen5-10g", .data = &xpcs_pma_gen5_10g },
 	{ .compatible = "snps,dw-xpcs-gen5-12g", .data = &xpcs_pma_gen5_12g },
+	{ .compatible = "nxp,sja1105-pcs", .data = &xpcs_sja1105 },
+	{ .compatible = "nxp,sja1110-pcs", .data = &xpcs_sja1110 },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, xpcs_of_ids);
-- 
2.34.1

[PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Vladimir Oltean]

The code in sja1105_mdio.c does the same thing as the one added by Serge
Semin in drivers/net/pcs/pcs-xpcs-plat.c (implements a virtual MDIO bus,
backed by either a direct or an indirect register access method), except
the latter is generic after the conversion to regmap.

Except for just one problem: pcs-xpcs-plat.c expects to probe on a
device tree node, and the SJA1105 and SJA1110 doesn't describe its XPCS
on the SGMII ports in the device tree.

This is both a problem and a design intention. I've long held the view
that for SPI devices which don't have a common .dtsi but whose bindings
have to be written many times by many people for many boards, less is
more, and all the details like internal subdevices can probably stay
hidden even if those devices are being configured by the kernel.

I've also held the view that DSA should delegate its responsibility for
configuring non-essential subdevices to other drivers in their
respective subsystems, and that the switching IP core (the one with the
DSA driver) should merely be one of the MFD children of a MFD parent
that is in charge of the spi_device.

This would mean something like the "mscc,vsc7512" example from
Documentation/devicetree/bindings/mfd/mscc,ocelot.yaml, but:
- retrofitting that model onto the SJA1105 bindings (and any other
  switch on a non-MMIO bus, where the ethernet-switch node coincides
  with the SPI/I2C bus device node) is a huge pain for backwards and
  especially forward compatibility, as it implies that the switch can be
  either a spi_device or a platform_device after the conversion
- if it sounds like it is conflicting with the first requirement of
  "less is more", yes it is

I've tried various ways of using the xpcs-plat driver while
avoiding major DT bindings changes for this switch, like
fwnode_create_software_node() and custom platform data.
Platform data was ugly and software nodes didn't work at all, for
reasons explained here:
https://lore.kernel.org/lkml/20230223203713.hcse3mkbq3m6sogb@skbuf/

I have to give huge credits to Andy Shevchenko, who after more than one
year remembered the discussion and referenced Hervé Codina's work on PCI
DT overlays, as well as a presentation from Lizhi Hou and Rob Herring.

I think I found the compromise solution that allows me to make progress,
which is to create a dynamic OF changeset that attaches the PCS node to
the live device tree, if it wasn't described already in the DTS, or use
the one from the DTS if it's already there. With a proper OF node, the
xpcs-plat driver probes just fine.

As for where to attach the XPCS node? Memory-mapped devices (in the
SPI address space, mind you) don't naturally sit well in the
"ethernet-switch" node, because that has #address-cells = <0>
and #size-cells = <0>.

We can't modify #address-cells and #size-cells, because "ethernet-switch"
has a reg-less "ethernet-ports" child node as per dsa.yaml, and the PCS
would sit on the same hierarchical level as that. Essentially this is
another angle of the argument that the DSA OF node shouldn't coincide
with the SPI bus device node, as this implies it is in control of the
entire address space.

The compromise, retrofit-ready solution here is to create a "regs"
container node which is a child of the ethernet-switch and
has #address-cells = <1> and #size-cells = <1>, then attach the XPCS to
that.

There also exists a use case where the XPCS is manually described
in the device tree, and that is when we need to describe SGMII lane
polarity inversion (not yet supported, TBD). In that case,
sja1105_fill_device_tree() simply backs off for the already present PCS
nodes, and sja1105_mfd_add_pcs_cells() works all the same.

A small implementation note in sja1105_create_pcs():
xpcs_create_fwnode() is NULL-tolerant via fwnode_device_is_available(),
so we don't need to explicitly handle the case where
priv->pcs_fwnode[port] wasn't assigned by sja1105_create_pcs_nodes()
(because the OF node exists in the DTS). This case currently returns
-ENODEV and will be handled by the next change.

Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Herve Codina <herve.codina@bootlin.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/dsa/sja1105/Kconfig        |   1 +
 drivers/net/dsa/sja1105/Makefile       |   1 -
 drivers/net/dsa/sja1105/sja1105.h      |  29 ++-
 drivers/net/dsa/sja1105/sja1105_main.c |  82 +++++++--
 drivers/net/dsa/sja1105/sja1105_mdio.c | 233 -------------------------
 drivers/net/dsa/sja1105/sja1105_mfd.c  | 228 +++++++++++++++++++++++-
 drivers/net/dsa/sja1105/sja1105_mfd.h  |   2 +
 drivers/net/dsa/sja1105/sja1105_spi.c  |  49 ++++--
 8 files changed, 342 insertions(+), 283 deletions(-)
 delete mode 100644 drivers/net/dsa/sja1105/sja1105_mdio.c

diff --git a/drivers/net/dsa/sja1105/Kconfig b/drivers/net/dsa/sja1105/Kconfig
index 932bca545d69..eef06e419559 100644
--- a/drivers/net/dsa/sja1105/Kconfig
+++ b/drivers/net/dsa/sja1105/Kconfig
@@ -8,6 +8,7 @@ tristate "NXP SJA1105 Ethernet switch family support"
 	select PACKING
 	select CRC32
 	select MFD_CORE
+	select OF_DYNAMIC
 	help
 	  This is the driver for the NXP SJA1105 (5-port) and SJA1110 (10-port)
 	  automotive Ethernet switch family. These are managed over an SPI
diff --git a/drivers/net/dsa/sja1105/Makefile b/drivers/net/dsa/sja1105/Makefile
index 3ac2d77dbe6c..94907116c1cc 100644
--- a/drivers/net/dsa/sja1105/Makefile
+++ b/drivers/net/dsa/sja1105/Makefile
@@ -4,7 +4,6 @@ obj-$(CONFIG_NET_DSA_SJA1105) += sja1105.o
 sja1105-objs := \
     sja1105_spi.o \
     sja1105_main.o \
-    sja1105_mdio.o \
     sja1105_mfd.o \
     sja1105_flower.o \
     sja1105_ethtool.o \
diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h
index 22fce143cb76..96954f1f5bcf 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -44,6 +44,8 @@
 #define SJA1105_RGMII_DELAY_MAX_PS \
 	SJA1105_RGMII_DELAY_PHASE_TO_PS(1017)
 
+#define SJA1105_SGMII_PORT		4
+
 typedef enum {
 	SPI_READ = 0,
 	SPI_WRITE = 1,
@@ -91,7 +93,6 @@ struct sja1105_regs {
 	u64 rmii_ref_clk[SJA1105_MAX_NUM_PORTS];
 	u64 rmii_ext_tx_clk[SJA1105_MAX_NUM_PORTS];
 	u64 stats[__MAX_SJA1105_STATS_AREA][SJA1105_MAX_NUM_PORTS];
-	u64 pcs_base[SJA1105_MAX_NUM_PORTS];
 };
 
 enum {
@@ -109,6 +110,13 @@ enum sja1105_internal_phy_t {
 	SJA1105_PHY_BASE_T1,
 };
 
+struct sja1105_pcs_resource {
+	struct resource res;
+	int port;
+	const char *cell_name;
+	const char *compatible;
+};
+
 struct sja1105_info {
 	u64 device_id;
 	/* Needed for distinction between P and R, and between Q and S
@@ -148,10 +156,6 @@ struct sja1105_info {
 	bool (*rxtstamp)(struct dsa_switch *ds, int port, struct sk_buff *skb);
 	void (*txtstamp)(struct dsa_switch *ds, int port, struct sk_buff *skb);
 	int (*clocking_setup)(struct sja1105_private *priv);
-	int (*pcs_mdio_read_c45)(struct mii_bus *bus, int phy, int mmd,
-				 int reg);
-	int (*pcs_mdio_write_c45)(struct mii_bus *bus, int phy, int mmd,
-				  int reg, u16 val);
 	int (*disable_microcontroller)(struct sja1105_private *priv);
 	const char *name;
 	bool supports_mii[SJA1105_MAX_NUM_PORTS];
@@ -161,6 +165,8 @@ struct sja1105_info {
 	bool supports_2500basex[SJA1105_MAX_NUM_PORTS];
 	enum sja1105_internal_phy_t internal_phy[SJA1105_MAX_NUM_PORTS];
 	const u64 port_speed[SJA1105_SPEED_MAX];
+	const struct sja1105_pcs_resource *pcs_resources;
+	size_t num_pcs_resources;
 };
 
 enum sja1105_key_type {
@@ -273,8 +279,9 @@ struct sja1105_private {
 	struct regmap *regmap;
 	struct devlink_region **regions;
 	struct sja1105_cbs_entry *cbs;
-	struct mii_bus *mdio_pcs;
 	struct phylink_pcs *pcs[SJA1105_MAX_NUM_PORTS];
+	struct fwnode_handle *pcs_fwnode[SJA1105_MAX_NUM_PORTS];
+	struct of_changeset of_cs;
 	struct sja1105_ptp_data ptp_data;
 	struct sja1105_tas_data tas_data;
 };
@@ -302,16 +309,6 @@ int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled,
 			   struct netlink_ext_ack *extack);
 void sja1105_frame_memory_partitioning(struct sja1105_private *priv);
 
-/* From sja1105_mdio.c */
-int sja1105_mdiobus_register(struct dsa_switch *ds);
-void sja1105_mdiobus_unregister(struct dsa_switch *ds);
-int sja1105_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg);
-int sja1105_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int mmd, int reg,
-			       u16 val);
-int sja1110_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg);
-int sja1110_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int mmd, int reg,
-			       u16 val);
-
 /* From sja1105_devlink.c */
 int sja1105_devlink_setup(struct dsa_switch *ds);
 void sja1105_devlink_teardown(struct dsa_switch *ds);
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 6da5c655dae7..70aecdf9fd0e 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -15,6 +15,7 @@
 #include <linux/of.h>
 #include <linux/of_net.h>
 #include <linux/of_mdio.h>
+#include <linux/pcs/pcs-xpcs.h>
 #include <linux/netdev_features.h>
 #include <linux/netdevice.h>
 #include <linux/if_bridge.h>
@@ -3032,6 +3033,44 @@ static int sja1105_port_bridge_flags(struct dsa_switch *ds, int port,
 	return 0;
 }
 
+static int sja1105_create_pcs(struct dsa_switch *ds, int port)
+{
+	struct sja1105_private *priv = ds->priv;
+	struct phylink_pcs *pcs;
+
+	if (priv->phy_mode[port] != PHY_INTERFACE_MODE_SGMII &&
+	    priv->phy_mode[port] != PHY_INTERFACE_MODE_2500BASEX)
+		return 0;
+
+	pcs = xpcs_create_pcs_fwnode(priv->pcs_fwnode[port]);
+	if (IS_ERR(pcs))
+		return PTR_ERR(pcs);
+
+	priv->pcs[port] = pcs;
+
+	return 0;
+}
+
+static void sja1105_destroy_pcs(struct dsa_switch *ds, int port)
+{
+	struct sja1105_private *priv = ds->priv;
+
+	if (priv->pcs[port]) {
+		xpcs_destroy_pcs(priv->pcs[port]);
+		priv->pcs[port] = NULL;
+	}
+}
+
+static int sja1105_port_setup(struct dsa_switch *ds, int port)
+{
+	return sja1105_create_pcs(ds, port);
+}
+
+static void sja1105_port_teardown(struct dsa_switch *ds, int port)
+{
+	sja1105_destroy_pcs(ds, port);
+}
+
 /* The programming model for the SJA1105 switch is "all-at-once" via static
  * configuration tables. Some of these can be dynamically modified at runtime,
  * but not the xMII mode parameters table.
@@ -3086,16 +3125,9 @@ static int sja1105_setup(struct dsa_switch *ds)
 		goto out_flower_teardown;
 	}
 
-	rc = sja1105_mdiobus_register(ds);
-	if (rc < 0) {
-		dev_err(ds->dev, "Failed to register MDIO bus: %pe\n",
-			ERR_PTR(rc));
-		goto out_ptp_clock_unregister;
-	}
-
 	rc = sja1105_devlink_setup(ds);
 	if (rc < 0)
-		goto out_mdiobus_unregister;
+		goto out_ptp_clock_unregister;
 
 	rtnl_lock();
 	rc = dsa_tag_8021q_register(ds, htons(ETH_P_8021Q));
@@ -3125,8 +3157,6 @@ static int sja1105_setup(struct dsa_switch *ds)
 
 out_devlink_teardown:
 	sja1105_devlink_teardown(ds);
-out_mdiobus_unregister:
-	sja1105_mdiobus_unregister(ds);
 out_ptp_clock_unregister:
 	sja1105_ptp_clock_unregister(ds);
 out_flower_teardown:
@@ -3147,7 +3177,6 @@ static void sja1105_teardown(struct dsa_switch *ds)
 	rtnl_unlock();
 
 	sja1105_devlink_teardown(ds);
-	sja1105_mdiobus_unregister(ds);
 	sja1105_ptp_clock_unregister(ds);
 	sja1105_flower_teardown(ds);
 	sja1105_tas_teardown(ds);
@@ -3166,6 +3195,8 @@ static const struct dsa_switch_ops sja1105_switch_ops = {
 	.connect_tag_protocol	= sja1105_connect_tag_protocol,
 	.setup			= sja1105_setup,
 	.teardown		= sja1105_teardown,
+	.port_setup		= sja1105_port_setup,
+	.port_teardown		= sja1105_port_teardown,
 	.set_ageing_time	= sja1105_set_ageing_time,
 	.port_change_mtu	= sja1105_change_mtu,
 	.port_max_mtu		= sja1105_get_max_mtu,
@@ -3362,32 +3393,51 @@ static int sja1105_probe(struct spi_device *spi)
 		return rc;
 	}
 
+	rc = sja1105_fill_device_tree(ds);
+	if (rc) {
+		dev_err(ds->dev, "Failed to fill device tree: %pe\n",
+			ERR_PTR(rc));
+		return rc;
+	}
+
 	rc = sja1105_mfd_add_devices(ds);
 	if (rc) {
 		dev_err(ds->dev, "Failed to create child devices: %pe\n",
 			ERR_PTR(rc));
-		return rc;
+		goto restore_device_tree;
 	}
 
 	if (IS_ENABLED(CONFIG_NET_SCH_CBS)) {
 		priv->cbs = devm_kcalloc(dev, priv->info->num_cbs_shapers,
 					 sizeof(struct sja1105_cbs_entry),
 					 GFP_KERNEL);
-		if (!priv->cbs)
-			return -ENOMEM;
+		if (!priv->cbs) {
+			rc = -ENOMEM;
+			goto restore_device_tree;
+		}
 	}
 
-	return dsa_register_switch(priv->ds);
+	rc = dsa_register_switch(priv->ds);
+	if (rc)
+		goto restore_device_tree;
+
+	return 0;
+
+restore_device_tree:
+	sja1105_restore_device_tree(ds);
+	return rc;
 }
 
 static void sja1105_remove(struct spi_device *spi)
 {
 	struct sja1105_private *priv = spi_get_drvdata(spi);
+	struct dsa_switch *ds = priv->ds;
 
 	if (!priv)
 		return;
 
-	dsa_unregister_switch(priv->ds);
+	dsa_unregister_switch(ds);
+	sja1105_restore_device_tree(ds);
 }
 
 static void sja1105_shutdown(struct spi_device *spi)
diff --git a/drivers/net/dsa/sja1105/sja1105_mdio.c b/drivers/net/dsa/sja1105/sja1105_mdio.c
deleted file mode 100644
index d5577c702902..000000000000
--- a/drivers/net/dsa/sja1105/sja1105_mdio.c
+++ /dev/null
@@ -1,233 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright 2021 NXP
- */
-#include <linux/pcs/pcs-xpcs.h>
-#include <linux/of_mdio.h>
-#include "sja1105.h"
-
-#define SJA1110_PCS_BANK_REG		SJA1110_SPI_ADDR(0x3fc)
-
-int sja1105_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg)
-{
-	struct sja1105_private *priv = bus->priv;
-	u64 addr;
-	u32 tmp;
-	int rc;
-
-	addr = (mmd << 16) | reg;
-
-	if (mmd != MDIO_MMD_VEND1 && mmd != MDIO_MMD_VEND2)
-		return 0xffff;
-
-	if (mmd == MDIO_MMD_VEND2 && (reg & GENMASK(15, 0)) == MII_PHYSID1)
-		return NXP_SJA1105_XPCS_ID >> 16;
-	if (mmd == MDIO_MMD_VEND2 && (reg & GENMASK(15, 0)) == MII_PHYSID2)
-		return NXP_SJA1105_XPCS_ID & GENMASK(15, 0);
-
-	rc = sja1105_xfer_u32(priv, SPI_READ, addr, &tmp, NULL);
-	if (rc < 0)
-		return rc;
-
-	return tmp & 0xffff;
-}
-
-int sja1105_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int mmd,
-			       int reg, u16 val)
-{
-	struct sja1105_private *priv = bus->priv;
-	u64 addr;
-	u32 tmp;
-
-	addr = (mmd << 16) | reg;
-	tmp = val;
-
-	if (mmd != MDIO_MMD_VEND1 && mmd != MDIO_MMD_VEND2)
-		return -EINVAL;
-
-	return sja1105_xfer_u32(priv, SPI_WRITE, addr, &tmp, NULL);
-}
-
-int sja1110_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg)
-{
-	struct sja1105_private *priv = bus->priv;
-	const struct sja1105_regs *regs = priv->info->regs;
-	int offset, bank;
-	u64 addr;
-	u32 tmp;
-	int rc;
-
-	if (regs->pcs_base[phy] == SJA1105_RSV_ADDR)
-		return -ENODEV;
-
-	addr = (mmd << 16) | reg;
-
-	if (mmd == MDIO_MMD_VEND2 && (reg & GENMASK(15, 0)) == MII_PHYSID1)
-		return NXP_SJA1110_XPCS_ID >> 16;
-	if (mmd == MDIO_MMD_VEND2 && (reg & GENMASK(15, 0)) == MII_PHYSID2)
-		return NXP_SJA1110_XPCS_ID & GENMASK(15, 0);
-
-	bank = addr >> 8;
-	offset = addr & GENMASK(7, 0);
-
-	/* This addressing scheme reserves register 0xff for the bank address
-	 * register, so that can never be addressed.
-	 */
-	if (WARN_ON(offset == 0xff))
-		return -ENODEV;
-
-	tmp = bank;
-
-	rc = sja1105_xfer_u32(priv, SPI_WRITE,
-			      regs->pcs_base[phy] + SJA1110_PCS_BANK_REG,
-			      &tmp, NULL);
-	if (rc < 0)
-		return rc;
-
-	rc = sja1105_xfer_u32(priv, SPI_READ, regs->pcs_base[phy] + offset,
-			      &tmp, NULL);
-	if (rc < 0)
-		return rc;
-
-	return tmp & 0xffff;
-}
-
-int sja1110_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int mmd, int reg,
-			       u16 val)
-{
-	struct sja1105_private *priv = bus->priv;
-	const struct sja1105_regs *regs = priv->info->regs;
-	int offset, bank;
-	u64 addr;
-	u32 tmp;
-	int rc;
-
-	if (regs->pcs_base[phy] == SJA1105_RSV_ADDR)
-		return -ENODEV;
-
-	addr = (mmd << 16) | reg;
-
-	bank = addr >> 8;
-	offset = addr & GENMASK(7, 0);
-
-	/* This addressing scheme reserves register 0xff for the bank address
-	 * register, so that can never be addressed.
-	 */
-	if (WARN_ON(offset == 0xff))
-		return -ENODEV;
-
-	tmp = bank;
-
-	rc = sja1105_xfer_u32(priv, SPI_WRITE,
-			      regs->pcs_base[phy] + SJA1110_PCS_BANK_REG,
-			      &tmp, NULL);
-	if (rc < 0)
-		return rc;
-
-	tmp = val;
-
-	return sja1105_xfer_u32(priv, SPI_WRITE, regs->pcs_base[phy] + offset,
-				&tmp, NULL);
-}
-
-static int sja1105_mdiobus_pcs_register(struct sja1105_private *priv)
-{
-	struct dsa_switch *ds = priv->ds;
-	struct mii_bus *bus;
-	int rc = 0;
-	int port;
-
-	if (!priv->info->pcs_mdio_read_c45 || !priv->info->pcs_mdio_write_c45)
-		return 0;
-
-	bus = mdiobus_alloc_size(0);
-	if (!bus)
-		return -ENOMEM;
-
-	bus->name = "SJA1105 PCS MDIO bus";
-	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-pcs",
-		 dev_name(ds->dev));
-	bus->read_c45 = priv->info->pcs_mdio_read_c45;
-	bus->write_c45 = priv->info->pcs_mdio_write_c45;
-	bus->parent = ds->dev;
-	/* There is no PHY on this MDIO bus => mask out all PHY addresses
-	 * from auto probing.
-	 */
-	bus->phy_mask = ~0;
-	bus->priv = priv;
-
-	rc = mdiobus_register(bus);
-	if (rc) {
-		mdiobus_free(bus);
-		return rc;
-	}
-
-	for (port = 0; port < ds->num_ports; port++) {
-		struct phylink_pcs *pcs;
-
-		if (dsa_is_unused_port(ds, port))
-			continue;
-
-		if (priv->phy_mode[port] != PHY_INTERFACE_MODE_SGMII &&
-		    priv->phy_mode[port] != PHY_INTERFACE_MODE_2500BASEX)
-			continue;
-
-		pcs = xpcs_create_pcs_mdiodev(bus, port);
-		if (IS_ERR(pcs)) {
-			rc = PTR_ERR(pcs);
-			goto out_pcs_free;
-		}
-
-		priv->pcs[port] = pcs;
-	}
-
-	priv->mdio_pcs = bus;
-
-	return 0;
-
-out_pcs_free:
-	for (port = 0; port < ds->num_ports; port++) {
-		if (priv->pcs[port]) {
-			xpcs_destroy_pcs(priv->pcs[port]);
-			priv->pcs[port] = NULL;
-		}
-	}
-
-	mdiobus_unregister(bus);
-	mdiobus_free(bus);
-
-	return rc;
-}
-
-static void sja1105_mdiobus_pcs_unregister(struct sja1105_private *priv)
-{
-	struct dsa_switch *ds = priv->ds;
-	int port;
-
-	if (!priv->mdio_pcs)
-		return;
-
-	for (port = 0; port < ds->num_ports; port++) {
-		if (priv->pcs[port]) {
-			xpcs_destroy_pcs(priv->pcs[port]);
-			priv->pcs[port] = NULL;
-		}
-	}
-
-	mdiobus_unregister(priv->mdio_pcs);
-	mdiobus_free(priv->mdio_pcs);
-	priv->mdio_pcs = NULL;
-}
-
-int sja1105_mdiobus_register(struct dsa_switch *ds)
-{
-	struct sja1105_private *priv = ds->priv;
-
-	return sja1105_mdiobus_pcs_register(priv);
-}
-
-void sja1105_mdiobus_unregister(struct dsa_switch *ds)
-{
-	struct sja1105_private *priv = ds->priv;
-
-	sja1105_mdiobus_pcs_unregister(priv);
-}
diff --git a/drivers/net/dsa/sja1105/sja1105_mfd.c b/drivers/net/dsa/sja1105/sja1105_mfd.c
index 9e60cd3b5d01..7785e7d33c3d 100644
--- a/drivers/net/dsa/sja1105/sja1105_mfd.c
+++ b/drivers/net/dsa/sja1105/sja1105_mfd.c
@@ -7,12 +7,40 @@
 #include "sja1105.h"
 #include "sja1105_mfd.h"
 
+#define SJA1105_MAX_NUM_MDIOS	2
+#define SJA1105_MAX_NUM_PCS	4
+#define SJA1105_MAX_NUM_CELLS	(SJA1105_MAX_NUM_MDIOS + \
+				 SJA1105_MAX_NUM_PCS + \
+				 1) /* sentinel */
+
 static const struct resource sja1110_mdio_cbtx_res =
 	DEFINE_RES_REG_NAMED(0x709000, 0x1000, "mdio_cbtx");
 
 static const struct resource sja1110_mdio_cbt1_res =
 	DEFINE_RES_REG_NAMED(0x704000, 0x4000, "mdio_cbt1");
 
+static void sja1105_mfd_add_pcs_cells(struct sja1105_private *priv,
+				      struct device_node *regs_node,
+				      struct mfd_cell *cells,
+				      int *num_cells)
+{
+	for (int i = 0; i < priv->info->num_pcs_resources; i++) {
+		const struct sja1105_pcs_resource *pcs_res;
+
+		pcs_res = &priv->info->pcs_resources[i];
+
+		cells[(*num_cells)++] = (struct mfd_cell) {
+			.name = pcs_res->cell_name,
+			.of_compatible = pcs_res->compatible,
+			.of_reg = pcs_res->res.start,
+			.use_of_reg = true,
+			.resources = &pcs_res->res,
+			.num_resources = 1,
+			.parent_of_node = regs_node,
+		};
+	}
+}
+
 static void sja1105_mfd_add_mdio_cells(struct sja1105_private *priv,
 				       struct device_node *mdio_node,
 				       struct mfd_cell *cells,
@@ -50,12 +78,16 @@ static void sja1105_mfd_add_mdio_cells(struct sja1105_private *priv,
 int sja1105_mfd_add_devices(struct dsa_switch *ds)
 {
 	struct device_node *switch_node = dev_of_node(ds->dev);
+	struct mfd_cell cells[SJA1105_MAX_NUM_CELLS] = {};
+	struct device_node *regs_node, *mdio_node;
 	struct sja1105_private *priv = ds->priv;
-	struct device_node *mdio_node;
-	struct mfd_cell cells[2] = {};
 	int num_cells = 0;
 	int rc = 0;
 
+	regs_node = of_get_available_child_by_name(switch_node, "regs");
+	if (regs_node)
+		sja1105_mfd_add_pcs_cells(priv, regs_node, cells, &num_cells);
+
 	mdio_node = of_get_available_child_by_name(switch_node, "mdios");
 	if (mdio_node)
 		sja1105_mfd_add_mdio_cells(priv, mdio_node, cells, &num_cells);
@@ -64,6 +96,198 @@ int sja1105_mfd_add_devices(struct dsa_switch *ds)
 		rc = devm_mfd_add_devices(ds->dev, PLATFORM_DEVID_AUTO, cells,
 					  num_cells, NULL, 0, NULL);
 
+	of_node_put(regs_node);
 	of_node_put(mdio_node);
 	return rc;
 }
+
+static bool sja1105_child_node_exists(struct device_node *node,
+				      const char *name,
+				      const struct resource *res)
+{
+	struct device_node *child = of_get_child_by_name(node, name);
+	u32 reg[2];
+
+	for_each_child_of_node(node, child) {
+		if (!of_node_name_eq(child, name))
+			continue;
+
+		if (of_property_read_u32_array(child, "reg", reg, ARRAY_SIZE(reg)))
+			continue;
+
+		if (reg[0] == res->start && reg[1] == resource_size(res))
+			return true;
+	}
+
+	return false;
+}
+
+static int sja1105_create_pcs_nodes(struct sja1105_private *priv,
+				    struct device_node *regs_node)
+{
+	struct dsa_switch *ds = priv->ds;
+	struct device *dev = ds->dev;
+	struct device_node *pcs_node;
+	const u32 reg_io_width = 4;
+	char node_name[32];
+	u32 reg_props[2];
+	int rc;
+
+	for (int i = 0; i < priv->info->num_pcs_resources; i++) {
+		const struct sja1105_pcs_resource *pcs_res;
+
+		pcs_res = &priv->info->pcs_resources[i];
+
+		if (sja1105_child_node_exists(regs_node, "ethernet-pcs",
+					      &pcs_res->res))
+			continue;
+
+		snprintf(node_name, sizeof(node_name), "ethernet-pcs@%llx",
+			 pcs_res->res.start);
+
+		pcs_node = of_changeset_create_node(&priv->of_cs, regs_node,
+						    node_name);
+		if (!pcs_node) {
+			dev_err(dev, "Failed to create PCS node %s\n", node_name);
+			return -ENOMEM;
+		}
+
+		rc = of_changeset_add_prop_string(&priv->of_cs, pcs_node,
+						  "compatible",
+						  pcs_res->compatible);
+		if (rc) {
+			dev_err(dev, "Failed to add compatible property to %s: %pe\n",
+				node_name, ERR_PTR(rc));
+			return rc;
+		}
+
+		reg_props[0] = pcs_res->res.start;
+		reg_props[1] = resource_size(&pcs_res->res);
+		rc = of_changeset_add_prop_u32_array(&priv->of_cs, pcs_node,
+						     "reg", reg_props, 2);
+		if (rc) {
+			dev_err(dev, "Failed to add reg property to %s: %pe\n",
+				node_name, ERR_PTR(rc));
+			return rc;
+		}
+
+		rc = of_changeset_add_prop_string(&priv->of_cs, pcs_node,
+						  "reg-names",
+						  pcs_res->res.name);
+		if (rc) {
+			dev_err(dev, "Failed to add reg-names property to %s: %pe\n",
+				node_name, ERR_PTR(rc));
+			return rc;
+		}
+
+		rc = of_changeset_add_prop_u32_array(&priv->of_cs, pcs_node,
+						     "reg-io-width",
+						     &reg_io_width, 1);
+		if (rc) {
+			dev_err(dev, "Failed to add reg-io-width property to %s: %pe\n",
+				node_name, ERR_PTR(rc));
+			return rc;
+		}
+
+		dev_dbg(dev, "Created OF node %pOF\n", pcs_node);
+		priv->pcs_fwnode[pcs_res->port] = of_fwnode_handle(pcs_node);
+	}
+
+	return 0;
+}
+
+static struct device_node *sja1105_create_regs_node(struct sja1105_private *priv,
+						    struct device_node *switch_node)
+{
+	struct device *dev = priv->ds->dev;
+	struct device_node *regs_node;
+	const u32 addr_size_cells = 1;
+	int rc;
+
+	regs_node = of_changeset_create_node(&priv->of_cs, switch_node, "regs");
+	if (!regs_node) {
+		dev_err(dev, "Failed to create 'regs' device tree node\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	rc = of_changeset_add_prop_u32_array(&priv->of_cs, regs_node,
+					     "#address-cells",
+					     &addr_size_cells, 1);
+	if (rc) {
+		dev_err(dev, "Failed to add #address-cells property: %pe\n",
+			ERR_PTR(rc));
+		return ERR_PTR(rc);
+	}
+
+	rc = of_changeset_add_prop_u32_array(&priv->of_cs, regs_node,
+					     "#size-cells",
+					     &addr_size_cells, 1);
+	if (rc) {
+		dev_err(dev, "Failed to add #size-cells property: %pe\n",
+			ERR_PTR(rc));
+		return ERR_PTR(rc);
+	}
+
+	return regs_node;
+}
+
+int sja1105_fill_device_tree(struct dsa_switch *ds)
+{
+	struct device_node *switch_node, *regs_node;
+	struct sja1105_private *priv = ds->priv;
+	bool regs_node_created = false;
+	struct device *dev = ds->dev;
+	int rc;
+
+	switch_node = dev_of_node(dev);
+	of_changeset_init(&priv->of_cs);
+
+	regs_node = of_get_child_by_name(switch_node, "regs");
+	if (!regs_node) {
+		regs_node = sja1105_create_regs_node(priv, switch_node);
+		if (IS_ERR(regs_node)) {
+			rc = PTR_ERR(regs_node);
+			goto out_destroy_changeset;
+		}
+
+		regs_node_created = true;
+		dev_dbg(dev, "Created OF node %pOF\n", regs_node);
+	}
+
+	rc = sja1105_create_pcs_nodes(priv, regs_node);
+	if (rc)
+		goto out_destroy_changeset;
+
+	rc = of_changeset_apply(&priv->of_cs);
+	if (rc) {
+		dev_err(dev, "Failed to apply device tree changeset: %pe\n",
+			ERR_PTR(rc));
+		goto out_destroy_changeset;
+	}
+
+	/* Don't destroy the changeset - we need it for reverting later */
+	goto out_put_regs_node;
+
+out_destroy_changeset:
+	of_changeset_destroy(&priv->of_cs);
+out_put_regs_node:
+	if (!regs_node_created)
+		of_node_put(regs_node);
+
+	return rc;
+}
+
+void sja1105_restore_device_tree(struct dsa_switch *ds)
+{
+	struct sja1105_private *priv = ds->priv;
+	struct device *dev = ds->dev;
+	int rc;
+
+	rc = of_changeset_revert(&priv->of_cs);
+	if (rc) {
+		dev_err(dev, "Failed to revert device tree changeset: %pe\n",
+			ERR_PTR(rc));
+	}
+
+	of_changeset_destroy(&priv->of_cs);
+}
diff --git a/drivers/net/dsa/sja1105/sja1105_mfd.h b/drivers/net/dsa/sja1105/sja1105_mfd.h
index c33c8ff24e25..7195c3aa1437 100644
--- a/drivers/net/dsa/sja1105/sja1105_mfd.h
+++ b/drivers/net/dsa/sja1105/sja1105_mfd.h
@@ -5,5 +5,7 @@
 #define _SJA1105_MFD_H
 
 int sja1105_mfd_add_devices(struct dsa_switch *ds);
+int sja1105_fill_device_tree(struct dsa_switch *ds);
+void sja1105_restore_device_tree(struct dsa_switch *ds);
 
 #endif
diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c b/drivers/net/dsa/sja1105/sja1105_spi.c
index 087acded7827..8af3d01d0f5c 100644
--- a/drivers/net/dsa/sja1105/sja1105_spi.c
+++ b/drivers/net/dsa/sja1105/sja1105_spi.c
@@ -617,9 +617,28 @@ static const struct sja1105_regs sja1110_regs = {
 	.ptpclkrate = SJA1110_SPI_ADDR(0x74),
 	.ptpclkcorp = SJA1110_SPI_ADDR(0x80),
 	.ptpsyncts = SJA1110_SPI_ADDR(0x84),
-	.pcs_base = {SJA1105_RSV_ADDR, 0x1c1400, 0x1c1800, 0x1c1c00, 0x1c2000,
-		     SJA1105_RSV_ADDR, SJA1105_RSV_ADDR, SJA1105_RSV_ADDR,
-		     SJA1105_RSV_ADDR, SJA1105_RSV_ADDR, SJA1105_RSV_ADDR},
+};
+
+/* See port compatibility matrix in Documentation/networking/dsa/sja1105.rst */
+static const struct sja1105_pcs_resource sja1105rs_pcs_resources[] = {
+	{ DEFINE_RES_REG_NAMED(0x0, 0x800000, "direct"),
+	  SJA1105_SGMII_PORT, "sja1105-pcs", "nxp,sja1105-pcs"
+	},
+};
+
+static const struct sja1105_pcs_resource sja1110_pcs_resources[] = {
+	{ DEFINE_RES_REG_NAMED(0x705000, 0x1000, "indirect"),
+	  1, "sja1110-pcs", "nxp,sja1110-pcs"
+	},
+	{ DEFINE_RES_REG_NAMED(0x706000, 0x1000, "indirect"),
+	  2, "sja1110-pcs", "nxp,sja1110-pcs"
+	},
+	{ DEFINE_RES_REG_NAMED(0x707000, 0x1000, "indirect"),
+	  3, "sja1110-pcs", "nxp,sja1110-pcs"
+	},
+	{ DEFINE_RES_REG_NAMED(0x708000, 0x1000, "indirect"),
+	  4, "sja1110-pcs", "nxp,sja1110-pcs"
+	},
 };
 
 const struct sja1105_info sja1105e_info = {
@@ -771,8 +790,6 @@ const struct sja1105_info sja1105r_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.rxtstamp		= sja1105_rxtstamp,
 	.clocking_setup		= sja1105_clocking_setup,
-	.pcs_mdio_read_c45	= sja1105_pcs_mdio_read_c45,
-	.pcs_mdio_write_c45	= sja1105_pcs_mdio_write_c45,
 	.regs			= &sja1105pqrs_regs,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
@@ -785,6 +802,8 @@ const struct sja1105_info sja1105r_info = {
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
 	.supports_sgmii		= {false, false, false, false, true},
+	.pcs_resources		= sja1105rs_pcs_resources,
+	.num_pcs_resources	= ARRAY_SIZE(sja1105rs_pcs_resources),
 	.name			= "SJA1105R",
 };
 
@@ -808,8 +827,6 @@ const struct sja1105_info sja1105s_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.rxtstamp		= sja1105_rxtstamp,
 	.clocking_setup		= sja1105_clocking_setup,
-	.pcs_mdio_read_c45	= sja1105_pcs_mdio_read_c45,
-	.pcs_mdio_write_c45	= sja1105_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 3,
@@ -821,6 +838,8 @@ const struct sja1105_info sja1105s_info = {
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
 	.supports_sgmii		= {false, false, false, false, true},
+	.pcs_resources		= sja1105rs_pcs_resources,
+	.num_pcs_resources	= ARRAY_SIZE(sja1105rs_pcs_resources),
 	.name			= "SJA1105S",
 };
 
@@ -847,8 +866,6 @@ const struct sja1105_info sja1110a_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
-	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,
@@ -872,6 +889,8 @@ const struct sja1105_info sja1110a_info = {
 				   SJA1105_PHY_BASE_T1, SJA1105_PHY_BASE_T1,
 				   SJA1105_PHY_BASE_T1, SJA1105_PHY_BASE_T1,
 				   SJA1105_PHY_BASE_T1},
+	.pcs_resources		= sja1110_pcs_resources,
+	.num_pcs_resources	= ARRAY_SIZE(sja1110_pcs_resources),
 	.name			= "SJA1110A",
 };
 
@@ -898,8 +917,6 @@ const struct sja1105_info sja1110b_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
-	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,
@@ -923,6 +940,8 @@ const struct sja1105_info sja1110b_info = {
 				   SJA1105_PHY_BASE_T1, SJA1105_PHY_BASE_T1,
 				   SJA1105_PHY_BASE_T1, SJA1105_PHY_BASE_T1,
 				   SJA1105_NO_PHY},
+	.pcs_resources		= &sja1110_pcs_resources[2], /* ports 3 and 4 */
+	.num_pcs_resources	= ARRAY_SIZE(sja1110_pcs_resources) - 2,
 	.name			= "SJA1110B",
 };
 
@@ -949,8 +968,6 @@ const struct sja1105_info sja1110c_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
-	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,
@@ -974,6 +991,8 @@ const struct sja1105_info sja1110c_info = {
 				   SJA1105_PHY_BASE_T1, SJA1105_PHY_BASE_T1,
 				   SJA1105_NO_PHY, SJA1105_NO_PHY,
 				   SJA1105_NO_PHY},
+	.pcs_resources		= &sja1110_pcs_resources[3], /* port 4 */
+	.num_pcs_resources	= ARRAY_SIZE(sja1110_pcs_resources) - 3,
 	.name			= "SJA1110C",
 };
 
@@ -1000,8 +1019,6 @@ const struct sja1105_info sja1110d_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
-	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,
@@ -1025,5 +1042,7 @@ const struct sja1105_info sja1110d_info = {
 				   SJA1105_PHY_BASE_T1, SJA1105_PHY_BASE_T1,
 				   SJA1105_NO_PHY, SJA1105_NO_PHY,
 				   SJA1105_NO_PHY},
+	.pcs_resources		= sja1110_pcs_resources,
+	.num_pcs_resources	= ARRAY_SIZE(sja1110_pcs_resources),
 	.name			= "SJA1110D",
 };
-- 
2.34.1

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Jakub Kicinski]

On Tue, 18 Nov 2025 21:05:29 +0200 Vladimir Oltean wrote:
> +static bool sja1105_child_node_exists(struct device_node *node,
> +				      const char *name,
> +				      const struct resource *res)
> +{
> +	struct device_node *child = of_get_child_by_name(node, name);
> +	u32 reg[2];
> +
> +	for_each_child_of_node(node, child) {
> +		if (!of_node_name_eq(child, name))
> +			continue;
> +
> +		if (of_property_read_u32_array(child, "reg", reg, ARRAY_SIZE(reg)))
> +			continue;
> +
> +		if (reg[0] == res->start && reg[1] == resource_size(res))
> +			return true;

coccicheck says you're likely leaking the reference on the child here

> +	}
> +
> +	return false;
> +}
-- 
pw-bot: cr

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Vladimir Oltean]

On Tue, Nov 18, 2025 at 04:41:30PM -0800, Jakub Kicinski wrote:
> On Tue, 18 Nov 2025 21:05:29 +0200 Vladimir Oltean wrote:
> > +static bool sja1105_child_node_exists(struct device_node *node,
> > +				      const char *name,
> > +				      const struct resource *res)
> > +{
> > +	struct device_node *child = of_get_child_by_name(node, name);
> > +	u32 reg[2];
> > +
> > +	for_each_child_of_node(node, child) {
> > +		if (!of_node_name_eq(child, name))
> > +			continue;
> > +
> > +		if (of_property_read_u32_array(child, "reg", reg, ARRAY_SIZE(reg)))
> > +			continue;
> > +
> > +		if (reg[0] == res->start && reg[1] == resource_size(res))
> > +			return true;
> 
> coccicheck says you're likely leaking the reference on the child here

Ok, one item added to the change list for v2.

Why is cocci-check.sh part of the "contest" test suite that runs on
remote executors? This test didn't run when I tested this series locally
with ingest_mdir.py.

> > +	}
> > +
> > +	return false;
> > +}
> -- 
> pw-bot: cr

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Andy Shevchenko]

On Wed, Nov 19, 2025 at 11:59:42AM +0200, Vladimir Oltean wrote:
> On Tue, Nov 18, 2025 at 04:41:30PM -0800, Jakub Kicinski wrote:
> > On Tue, 18 Nov 2025 21:05:29 +0200 Vladimir Oltean wrote:

...

> > > +	for_each_child_of_node(node, child) {
> > > +		if (!of_node_name_eq(child, name))
> > > +			continue;
> > > +
> > > +		if (of_property_read_u32_array(child, "reg", reg, ARRAY_SIZE(reg)))
> > > +			continue;
> > > +
> > > +		if (reg[0] == res->start && reg[1] == resource_size(res))
> > > +			return true;
> > 
> > coccicheck says you're likely leaking the reference on the child here
> 
> Ok, one item added to the change list for v2.

Note, we have __free() and _scoped() variants of the respective APIs to make it
easier to not forget.

> Why is cocci-check.sh part of the "contest" test suite that runs on
> remote executors? This test didn't run when I tested this series locally
> with ingest_mdir.py.

I believe it's due to heavy load it makes. Running it on a (whole) kernel make
take hours.


-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Vladimir Oltean]

On Wed, Nov 19, 2025 at 12:31:27PM +0200, Andy Shevchenko wrote:
> On Wed, Nov 19, 2025 at 11:59:42AM +0200, Vladimir Oltean wrote:
> > On Tue, Nov 18, 2025 at 04:41:30PM -0800, Jakub Kicinski wrote:
> > > On Tue, 18 Nov 2025 21:05:29 +0200 Vladimir Oltean wrote:
> 
> ...
> 
> > > > +	for_each_child_of_node(node, child) {
> > > > +		if (!of_node_name_eq(child, name))
> > > > +			continue;
> > > > +
> > > > +		if (of_property_read_u32_array(child, "reg", reg, ARRAY_SIZE(reg)))
> > > > +			continue;
> > > > +
> > > > +		if (reg[0] == res->start && reg[1] == resource_size(res))
> > > > +			return true;
> > > 
> > > coccicheck says you're likely leaking the reference on the child here
> > 
> > Ok, one item added to the change list for v2.
> 
> Note, we have __free() and _scoped() variants of the respective APIs to make it
> easier to not forget.

Ok, I'll use for_each_child_of_node_scoped(), as it's a good fit, thanks.

> > Why is cocci-check.sh part of the "contest" test suite that runs on
> > remote executors? This test didn't run when I tested this series locally
> > with ingest_mdir.py.
> 
> I believe it's due to heavy load it makes. Running it on a (whole) kernel make
> take hours.

For context, the "local" NIPA tests for this set took me 3 hours and 34 minutes
to run on 32 AMD EPYC 9R14 CPU cores. So if cocci-check.sh increases that time
by a few additional hours, yeah, it's bad, but it was bad before too, so
the "heavy load" argument doesn't satisfactorily explain things.

Plus, looking deeper at the NIPA code, it only submits the patch set
under test to a "contest" branch if it already passed the slow
gate_checks=build_clang,build_32bit,build_allmodconfig_warn. So it's not
like the "local" build tests run in parallel with the remote worker, and
we're not saving any time for a single build.

I think it's due to the fact that the "contest" checks are fundamentally
so slow, that they can't be run on individual patch sets, and are run on
batches of patch sets merged into a single branch (of which there seem
to be 8 per day). I didn't get this from NIPA documentation, though.

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Jakub Kicinski]

On Wed, 19 Nov 2025 13:25:22 +0200 Vladimir Oltean wrote:
> I think it's due to the fact that the "contest" checks are fundamentally
> so slow, that they can't be run on individual patch sets, and are run on
> batches of patch sets merged into a single branch (of which there seem
> to be 8 per day).

Correct, looking at the logs AFAICT coccicheck takes 25min on a
relatively beefy machine, and we only run it on path that were actually
modified by pending changes. We get 100+ patches a day, and 40+ series,
and coccicheck fails relatively rarely. So on the NIPA side it's not
worth it.

But, we can certainly integrate it into ingest_mdir.

FTR make htmldocs and of course selftests are also not executed by
ingest_mdir.

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Andy Shevchenko]

On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:
> On Wed, 19 Nov 2025 13:25:22 +0200 Vladimir Oltean wrote:
> > I think it's due to the fact that the "contest" checks are fundamentally
> > so slow, that they can't be run on individual patch sets, and are run on
> > batches of patch sets merged into a single branch (of which there seem
> > to be 8 per day).
> 
> Correct, looking at the logs AFAICT coccicheck takes 25min on a
> relatively beefy machine, and we only run it on path that were actually
> modified by pending changes. We get 100+ patches a day, and 40+ series,
> and coccicheck fails relatively rarely. So on the NIPA side it's not
> worth it.
> 
> But, we can certainly integrate it into ingest_mdir.
> 
> FTR make htmldocs and of course selftests are also not executed by
> ingest_mdir.

Btw, do you do `make W=1` while having CONFIG_WERROR=y?
And if so, do you also compile with clang?

Sorry if it's documented / answered already, please point me to that discussion
/ documentation.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Russell King (Oracle)]

On Wed, Nov 19, 2025 at 06:17:48PM +0200, Andy Shevchenko wrote:
> On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:
> > On Wed, 19 Nov 2025 13:25:22 +0200 Vladimir Oltean wrote:
> > > I think it's due to the fact that the "contest" checks are fundamentally
> > > so slow, that they can't be run on individual patch sets, and are run on
> > > batches of patch sets merged into a single branch (of which there seem
> > > to be 8 per day).
> > 
> > Correct, looking at the logs AFAICT coccicheck takes 25min on a
> > relatively beefy machine, and we only run it on path that were actually
> > modified by pending changes. We get 100+ patches a day, and 40+ series,
> > and coccicheck fails relatively rarely. So on the NIPA side it's not
> > worth it.
> > 
> > But, we can certainly integrate it into ingest_mdir.
> > 
> > FTR make htmldocs and of course selftests are also not executed by
> > ingest_mdir.
> 
> Btw, do you do `make W=1` while having CONFIG_WERROR=y?
> And if so, do you also compile with clang?

If you look at any patch in patchwork, e.g.

https://patchwork.kernel.org/project/netdevbpf/patch/E1vLgSZ-0000000FMrW-0cEu@rmk-PC.armlinux.org.uk/

it gives a list of the tests performed. In answer to your questions:

netdev/build_clang 	success 	Errors and warnings before: 1 this patch: 1

So yes, building with clang is tested.

I can say that stuff such as unused const variables gets found by
nipa, via -Wunused-const-variable, which as I understand it is a
W=1 thing.

I suspect CONFIG_WERROR=y isn't used (I don't know) as that would
stop the build on warnings, whereas what is done instead is that
the output of the build is analysed, and the number of warnings
counted and reported in patchwork. Note that the "build" stuff
reports number of errors/warnings before and after the patch.

Hope this answers your question.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Andy Shevchenko]

On Wed, Nov 19, 2025 at 05:23:48PM +0000, Russell King (Oracle) wrote:
> On Wed, Nov 19, 2025 at 06:17:48PM +0200, Andy Shevchenko wrote:
> > On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:
> > > On Wed, 19 Nov 2025 13:25:22 +0200 Vladimir Oltean wrote:
> > > > I think it's due to the fact that the "contest" checks are fundamentally
> > > > so slow, that they can't be run on individual patch sets, and are run on
> > > > batches of patch sets merged into a single branch (of which there seem
> > > > to be 8 per day).
> > > 
> > > Correct, looking at the logs AFAICT coccicheck takes 25min on a
> > > relatively beefy machine, and we only run it on path that were actually
> > > modified by pending changes. We get 100+ patches a day, and 40+ series,
> > > and coccicheck fails relatively rarely. So on the NIPA side it's not
> > > worth it.
> > > 
> > > But, we can certainly integrate it into ingest_mdir.
> > > 
> > > FTR make htmldocs and of course selftests are also not executed by
> > > ingest_mdir.
> > 
> > Btw, do you do `make W=1` while having CONFIG_WERROR=y?
> > And if so, do you also compile with clang?
> 
> If you look at any patch in patchwork, e.g.
> 
> https://patchwork.kernel.org/project/netdevbpf/patch/E1vLgSZ-0000000FMrW-0cEu@rmk-PC.armlinux.org.uk/
> 
> it gives a list of the tests performed. In answer to your questions:
> 
> netdev/build_clang 	success 	Errors and warnings before: 1 this patch: 1
> 
> So yes, building with clang is tested.
> 
> I can say that stuff such as unused const variables gets found by
> nipa, via -Wunused-const-variable, which as I understand it is a
> W=1 thing.
> 
> I suspect CONFIG_WERROR=y isn't used (I don't know) as that would
> stop the build on warnings, whereas what is done instead is that
> the output of the build is analysed, and the number of warnings
> counted and reported in patchwork. Note that the "build" stuff
> reports number of errors/warnings before and after the patch.
> 
> Hope this answers your question.

Pretty much, thanks!

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Jakub Kicinski]

On Wed, 19 Nov 2025 19:39:32 +0200 Andy Shevchenko wrote:
> On Wed, Nov 19, 2025 at 05:23:48PM +0000, Russell King (Oracle) wrote:
> > On Wed, Nov 19, 2025 at 06:17:48PM +0200, Andy Shevchenko wrote:  
> > > On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:  
> > I can say that stuff such as unused const variables gets found by
> > nipa, via -Wunused-const-variable, which as I understand it is a
> > W=1 thing.
> > 
> > I suspect CONFIG_WERROR=y isn't used (I don't know) as that would
> > stop the build on warnings, whereas what is done instead is that
> > the output of the build is analysed, and the number of warnings
> > counted and reported in patchwork. Note that the "build" stuff
> > reports number of errors/warnings before and after the patch.
> > 
> > Hope this answers your question.  
> 
> Pretty much, thanks!

We do:

prep_config() {
  make LLVM=1 O=$output_dir allmodconfig
  ./scripts/config --file $output_dir/.config -d werror
  ./scripts/config --file $output_dir/.config -d drm_werror
  ./scripts/config --file $output_dir/.config -d kvm_werror
}

I have strong feelings about people who think Werror is an acceptable
practice in 2025, but let me not violate the CoC here..

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Andy Shevchenko]

On Wed, Nov 19, 2025 at 10:35:45AM -0800, Jakub Kicinski wrote:
> On Wed, 19 Nov 2025 19:39:32 +0200 Andy Shevchenko wrote:
> > On Wed, Nov 19, 2025 at 05:23:48PM +0000, Russell King (Oracle) wrote:
> > > On Wed, Nov 19, 2025 at 06:17:48PM +0200, Andy Shevchenko wrote:  
> > > > On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:  
> > > I can say that stuff such as unused const variables gets found by
> > > nipa, via -Wunused-const-variable, which as I understand it is a
> > > W=1 thing.
> > > 
> > > I suspect CONFIG_WERROR=y isn't used (I don't know) as that would
> > > stop the build on warnings, whereas what is done instead is that
> > > the output of the build is analysed, and the number of warnings
> > > counted and reported in patchwork. Note that the "build" stuff
> > > reports number of errors/warnings before and after the patch.
> > > 
> > > Hope this answers your question.  
> > 
> > Pretty much, thanks!
> 
> We do:

A-ha, thanks!

> prep_config() {
>   make LLVM=1 O=$output_dir allmodconfig
>   ./scripts/config --file $output_dir/.config -d werror
>   ./scripts/config --file $output_dir/.config -d drm_werror
>   ./scripts/config --file $output_dir/.config -d kvm_werror
> }
> 
> I have strong feelings about people who think Werror is an acceptable
> practice in 2025, but let me not violate the CoC here..

WERROR=y by default was introduced you-know-by-whom :-)

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Russell King (Oracle)]

On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:
> On Wed, 19 Nov 2025 13:25:22 +0200 Vladimir Oltean wrote:
> > I think it's due to the fact that the "contest" checks are fundamentally
> > so slow, that they can't be run on individual patch sets, and are run on
> > batches of patch sets merged into a single branch (of which there seem
> > to be 8 per day).
> 
> Correct, looking at the logs AFAICT coccicheck takes 25min on a
> relatively beefy machine, and we only run it on path that were actually
> modified by pending changes. We get 100+ patches a day, and 40+ series,
> and coccicheck fails relatively rarely. So on the NIPA side it's not
> worth it.

On "contest" I find when looking at patchwork, it's just best to ignore
the result that NIPA posts for that, because more often than not it
reports "fail" when there's nothing wrong.

For example, the qcom-ethqos patches - v1 passed contest, and this
morning I submitted v2. The only change was removing the double space
in patch 2. What I see in v2 is that _all_ the patches failed contest,
even those that are unchanged and previously passed. This makes
contest unreliable and IMHO misleading - and as such I hate it.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Jakub Kicinski]

On Thu, 20 Nov 2025 12:32:37 +0000 Russell King (Oracle) wrote:
> On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:
> > On Wed, 19 Nov 2025 13:25:22 +0200 Vladimir Oltean wrote:  
> > > I think it's due to the fact that the "contest" checks are fundamentally
> > > so slow, that they can't be run on individual patch sets, and are run on
> > > batches of patch sets merged into a single branch (of which there seem
> > > to be 8 per day).  
> > 
> > Correct, looking at the logs AFAICT coccicheck takes 25min on a
> > relatively beefy machine, and we only run it on path that were actually
> > modified by pending changes. We get 100+ patches a day, and 40+ series,
> > and coccicheck fails relatively rarely. So on the NIPA side it's not
> > worth it.  
> 
> On "contest" I find when looking at patchwork, it's just best to ignore
> the result that NIPA posts for that, because more often than not it
> reports "fail" when there's nothing wrong.
> 
> For example, the qcom-ethqos patches - v1 passed contest, and this
> morning I submitted v2. The only change was removing the double space
> in patch 2. What I see in v2 is that _all_ the patches failed contest,
> even those that are unchanged and previously passed. This makes
> contest unreliable and IMHO misleading - and as such I hate it.

Fair, I'll fix it over the weekend. tl;dr it shows up as failing until
we get a clean run because of patchwork UI shortcomings.

Long version is that unfortunately patchwork UI does not show "pending"
tests on the main page. So when we eyeball the queue to get a sense
of patches which are fully validated its hard to tell "done" from 
"in progress". I believe BPF's KPD system also uses "fail until
finished", I'm guessing for the same reason. 

That said I stopped using the patchwork UI completely now, and switch 
to my own UIs within NIPA. So patchwork shortcomings are no longer 
a concern.

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[kernel test robot]

Hi Vladimir,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Vladimir-Oltean/net-dsa-sja1105-let-phylink-help-with-the-replay-of-link-callbacks/20251119-031300
base:   net-next/main
patch link:    https://lore.kernel.org/r/20251118190530.580267-15-vladimir.oltean%40nxp.com
patch subject: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20251119/202511191835.rwfD48SW-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511191835.rwfD48SW-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511191835.rwfD48SW-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/dsa/sja1105/sja1105_mfd.c: In function 'sja1105_create_pcs_nodes':
>> drivers/net/dsa/sja1105/sja1105_mfd.c:145:73: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'resource_size_t' {aka 'unsigned int'} [-Wformat=]
     145 |                 snprintf(node_name, sizeof(node_name), "ethernet-pcs@%llx",
         |                                                                      ~~~^
         |                                                                         |
         |                                                                         long long unsigned int
         |                                                                      %x
     146 |                          pcs_res->res.start);
         |                          ~~~~~~~~~~~~~~~~~~                              
         |                                      |
         |                                      resource_size_t {aka unsigned int}


vim +145 drivers/net/dsa/sja1105/sja1105_mfd.c

   124	
   125	static int sja1105_create_pcs_nodes(struct sja1105_private *priv,
   126					    struct device_node *regs_node)
   127	{
   128		struct dsa_switch *ds = priv->ds;
   129		struct device *dev = ds->dev;
   130		struct device_node *pcs_node;
   131		const u32 reg_io_width = 4;
   132		char node_name[32];
   133		u32 reg_props[2];
   134		int rc;
   135	
   136		for (int i = 0; i < priv->info->num_pcs_resources; i++) {
   137			const struct sja1105_pcs_resource *pcs_res;
   138	
   139			pcs_res = &priv->info->pcs_resources[i];
   140	
   141			if (sja1105_child_node_exists(regs_node, "ethernet-pcs",
   142						      &pcs_res->res))
   143				continue;
   144	
 > 145			snprintf(node_name, sizeof(node_name), "ethernet-pcs@%llx",
   146				 pcs_res->res.start);
   147	
   148			pcs_node = of_changeset_create_node(&priv->of_cs, regs_node,
   149							    node_name);
   150			if (!pcs_node) {
   151				dev_err(dev, "Failed to create PCS node %s\n", node_name);
   152				return -ENOMEM;
   153			}
   154	
   155			rc = of_changeset_add_prop_string(&priv->of_cs, pcs_node,
   156							  "compatible",
   157							  pcs_res->compatible);
   158			if (rc) {
   159				dev_err(dev, "Failed to add compatible property to %s: %pe\n",
   160					node_name, ERR_PTR(rc));
   161				return rc;
   162			}
   163	
   164			reg_props[0] = pcs_res->res.start;
   165			reg_props[1] = resource_size(&pcs_res->res);
   166			rc = of_changeset_add_prop_u32_array(&priv->of_cs, pcs_node,
   167							     "reg", reg_props, 2);
   168			if (rc) {
   169				dev_err(dev, "Failed to add reg property to %s: %pe\n",
   170					node_name, ERR_PTR(rc));
   171				return rc;
   172			}
   173	
   174			rc = of_changeset_add_prop_string(&priv->of_cs, pcs_node,
   175							  "reg-names",
   176							  pcs_res->res.name);
   177			if (rc) {
   178				dev_err(dev, "Failed to add reg-names property to %s: %pe\n",
   179					node_name, ERR_PTR(rc));
   180				return rc;
   181			}
   182	
   183			rc = of_changeset_add_prop_u32_array(&priv->of_cs, pcs_node,
   184							     "reg-io-width",
   185							     &reg_io_width, 1);
   186			if (rc) {
   187				dev_err(dev, "Failed to add reg-io-width property to %s: %pe\n",
   188					node_name, ERR_PTR(rc));
   189				return rc;
   190			}
   191	
   192			dev_dbg(dev, "Created OF node %pOF\n", pcs_node);
   193			priv->pcs_fwnode[pcs_res->port] = of_fwnode_handle(pcs_node);
   194		}
   195	
   196		return 0;
   197	}
   198	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Vladimir Oltean]

On Wed, Nov 19, 2025 at 07:19:59PM +0800, kernel test robot wrote:
> Hi Vladimir,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on net-next/main]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Vladimir-Oltean/net-dsa-sja1105-let-phylink-help-with-the-replay-of-link-callbacks/20251119-031300
> base:   net-next/main
> patch link:    https://lore.kernel.org/r/20251118190530.580267-15-vladimir.oltean%40nxp.com
> patch subject: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver
> config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20251119/202511191835.rwfD48SW-lkp@intel.com/config)
> compiler: m68k-linux-gcc (GCC) 15.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511191835.rwfD48SW-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202511191835.rwfD48SW-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>    drivers/net/dsa/sja1105/sja1105_mfd.c: In function 'sja1105_create_pcs_nodes':
> >> drivers/net/dsa/sja1105/sja1105_mfd.c:145:73: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'resource_size_t' {aka 'unsigned int'} [-Wformat=]
>      145 |                 snprintf(node_name, sizeof(node_name), "ethernet-pcs@%llx",
>          |                                                                      ~~~^
>          |                                                                         |
>          |                                                                         long long unsigned int
>          |                                                                      %x
>      146 |                          pcs_res->res.start);
>          |                          ~~~~~~~~~~~~~~~~~~
>          |                                      |
>          |                                      resource_size_t {aka unsigned int}

I do wonder how to print resource_size_t (typedef to phys_addr_t, which
is typedeffed to u64 or u32 depending on CONFIG_PHYS_ADDR_T_64BIT).

Using %pa should be fine, like drivers/irqchip/irq-gic-v3-its.c does?

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Russell King (Oracle)]

On Wed, Nov 19, 2025 at 02:01:11PM +0200, Vladimir Oltean wrote:
> I do wonder how to print resource_size_t (typedef to phys_addr_t, which
> is typedeffed to u64 or u32 depending on CONFIG_PHYS_ADDR_T_64BIT).

From the now hard to find Documentation/core-api/printk-formats.rst:

Physical address types phys_addr_t
----------------------------------

::

        %pa[p]  0x01234567 or 0x0123456789abcdef

For printing a phys_addr_t type (and its derivatives, such as
resource_size_t) which can vary based on build options, regardless of the
width of the CPU data path.

Passed by reference.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Russell King (Oracle)]

On Wed, Nov 19, 2025 at 12:03:29PM +0000, Russell King (Oracle) wrote:
> On Wed, Nov 19, 2025 at 02:01:11PM +0200, Vladimir Oltean wrote:
> > I do wonder how to print resource_size_t (typedef to phys_addr_t, which
> > is typedeffed to u64 or u32 depending on CONFIG_PHYS_ADDR_T_64BIT).
> 
> From the now hard to find Documentation/core-api/printk-formats.rst:
> 
> Physical address types phys_addr_t
> ----------------------------------
> 
> ::
> 
>         %pa[p]  0x01234567 or 0x0123456789abcdef
> 
> For printing a phys_addr_t type (and its derivatives, such as
> resource_size_t) which can vary based on build options, regardless of the
> width of the CPU data path.
> 
> Passed by reference.

Hmm, but I guess you don't want the 0x prefix. Maybe print it to a
separate buffer and then lop off the first two characters?

Another solution would be to always cast it to a u64 and use %llx as
suggested in the "Integer types" section.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[Vladimir Oltean]

On Wed, Nov 19, 2025 at 12:05:43PM +0000, Russell King (Oracle) wrote:
> On Wed, Nov 19, 2025 at 12:03:29PM +0000, Russell King (Oracle) wrote:
> > On Wed, Nov 19, 2025 at 02:01:11PM +0200, Vladimir Oltean wrote:
> > > I do wonder how to print resource_size_t (typedef to phys_addr_t, which
> > > is typedeffed to u64 or u32 depending on CONFIG_PHYS_ADDR_T_64BIT).
> > 
> > From the now hard to find Documentation/core-api/printk-formats.rst:

I really wasn't aware of this, and I was reading the inline docs from
lib/vsprintf.c all this time... Thanks!

> > Physical address types phys_addr_t
> > ----------------------------------
> > 
> > ::
> > 
> >         %pa[p]  0x01234567 or 0x0123456789abcdef
> > 
> > For printing a phys_addr_t type (and its derivatives, such as
> > resource_size_t) which can vary based on build options, regardless of the
> > width of the CPU data path.
> > 
> > Passed by reference.
> 
> Hmm, but I guess you don't want the 0x prefix. Maybe print it to a
> separate buffer and then lop off the first two characters?
> 
> Another solution would be to always cast it to a u64 and use %llx as
> suggested in the "Integer types" section.

Yeah, although I see the ePAPR section on node names doesn't disallow
the 0x prefix for the unit-address, it is just that the established
convention is without it.

By far the most unassuming option seems to be to do explicit type
casting to unsigned long long. I've started a new test build with the
changes made so far.

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[kernel test robot]

Hi Vladimir,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Vladimir-Oltean/net-dsa-sja1105-let-phylink-help-with-the-replay-of-link-callbacks/20251119-031300
base:   net-next/main
patch link:    https://lore.kernel.org/r/20251118190530.580267-15-vladimir.oltean%40nxp.com
patch subject: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver
config: hexagon-randconfig-002-20251119 (https://download.01.org/0day-ci/archive/20251119/202511191946.DzxNhLVl-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 0bba1e76581bad04e7d7f09f5115ae5e2989e0d9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511191946.DzxNhLVl-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511191946.DzxNhLVl-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/net/dsa/sja1105/sja1105_mfd.c:146:5: warning: format specifies type 'unsigned long long' but the argument has type 'resource_size_t' (aka 'unsigned int') [-Wformat]
     145 |                 snprintf(node_name, sizeof(node_name), "ethernet-pcs@%llx",
         |                                                                      ~~~~
         |                                                                      %x
     146 |                          pcs_res->res.start);
         |                          ^~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +146 drivers/net/dsa/sja1105/sja1105_mfd.c

   124	
   125	static int sja1105_create_pcs_nodes(struct sja1105_private *priv,
   126					    struct device_node *regs_node)
   127	{
   128		struct dsa_switch *ds = priv->ds;
   129		struct device *dev = ds->dev;
   130		struct device_node *pcs_node;
   131		const u32 reg_io_width = 4;
   132		char node_name[32];
   133		u32 reg_props[2];
   134		int rc;
   135	
   136		for (int i = 0; i < priv->info->num_pcs_resources; i++) {
   137			const struct sja1105_pcs_resource *pcs_res;
   138	
   139			pcs_res = &priv->info->pcs_resources[i];
   140	
   141			if (sja1105_child_node_exists(regs_node, "ethernet-pcs",
   142						      &pcs_res->res))
   143				continue;
   144	
   145			snprintf(node_name, sizeof(node_name), "ethernet-pcs@%llx",
 > 146				 pcs_res->res.start);
   147	
   148			pcs_node = of_changeset_create_node(&priv->of_cs, regs_node,
   149							    node_name);
   150			if (!pcs_node) {
   151				dev_err(dev, "Failed to create PCS node %s\n", node_name);
   152				return -ENOMEM;
   153			}
   154	
   155			rc = of_changeset_add_prop_string(&priv->of_cs, pcs_node,
   156							  "compatible",
   157							  pcs_res->compatible);
   158			if (rc) {
   159				dev_err(dev, "Failed to add compatible property to %s: %pe\n",
   160					node_name, ERR_PTR(rc));
   161				return rc;
   162			}
   163	
   164			reg_props[0] = pcs_res->res.start;
   165			reg_props[1] = resource_size(&pcs_res->res);
   166			rc = of_changeset_add_prop_u32_array(&priv->of_cs, pcs_node,
   167							     "reg", reg_props, 2);
   168			if (rc) {
   169				dev_err(dev, "Failed to add reg property to %s: %pe\n",
   170					node_name, ERR_PTR(rc));
   171				return rc;
   172			}
   173	
   174			rc = of_changeset_add_prop_string(&priv->of_cs, pcs_node,
   175							  "reg-names",
   176							  pcs_res->res.name);
   177			if (rc) {
   178				dev_err(dev, "Failed to add reg-names property to %s: %pe\n",
   179					node_name, ERR_PTR(rc));
   180				return rc;
   181			}
   182	
   183			rc = of_changeset_add_prop_u32_array(&priv->of_cs, pcs_node,
   184							     "reg-io-width",
   185							     &reg_io_width, 1);
   186			if (rc) {
   187				dev_err(dev, "Failed to add reg-io-width property to %s: %pe\n",
   188					node_name, ERR_PTR(rc));
   189				return rc;
   190			}
   191	
   192			dev_dbg(dev, "Created OF node %pOF\n", pcs_node);
   193			priv->pcs_fwnode[pcs_res->port] = of_fwnode_handle(pcs_node);
   194		}
   195	
   196		return 0;
   197	}
   198	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

[kernel test robot]

Hi Vladimir,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Vladimir-Oltean/net-dsa-sja1105-let-phylink-help-with-the-replay-of-link-callbacks/20251119-031300
base:   net-next/main
patch link:    https://lore.kernel.org/r/20251118190530.580267-15-vladimir.oltean%40nxp.com
patch subject: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver
config: s390-randconfig-002-20251120 (https://download.01.org/0day-ci/archive/20251120/202511200752.hGkPwqbU-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251120/202511200752.hGkPwqbU-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511200752.hGkPwqbU-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/cpufreq.h:17,
                    from kernel/sched/sched.h:31,
                    from kernel/sched/rq-offsets.c:5:
   include/linux/of.h: In function 'of_changeset_attach_node':
>> include/linux/of.h:1623:34: error: 'OF_RECONFIG_ATTACH_NODE' undeclared (first use in this function); did you mean 'OF_RECONFIG_NO_CHANGE'?
     return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
                                     ^~~~~~~~~~~~~~~~~~~~~~~
                                     OF_RECONFIG_NO_CHANGE
   include/linux/of.h:1623:34: note: each undeclared identifier is reported only once for each function it appears in
   include/linux/of.h: In function 'of_changeset_detach_node':
>> include/linux/of.h:1629:34: error: 'OF_RECONFIG_DETACH_NODE' undeclared (first use in this function); did you mean 'OF_RECONFIG_NO_CHANGE'?
     return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
                                     ^~~~~~~~~~~~~~~~~~~~~~~
                                     OF_RECONFIG_NO_CHANGE
   include/linux/of.h: In function 'of_changeset_add_property':
>> include/linux/of.h:1635:34: error: 'OF_RECONFIG_ADD_PROPERTY' undeclared (first use in this function); did you mean 'OF_RECONFIG_NO_CHANGE'?
     return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
                                     ^~~~~~~~~~~~~~~~~~~~~~~~
                                     OF_RECONFIG_NO_CHANGE
   include/linux/of.h: In function 'of_changeset_remove_property':
>> include/linux/of.h:1641:34: error: 'OF_RECONFIG_REMOVE_PROPERTY' undeclared (first use in this function); did you mean 'OF_RECONFIG_CHANGE_REMOVE'?
     return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
                                     OF_RECONFIG_CHANGE_REMOVE
   include/linux/of.h: In function 'of_changeset_update_property':
>> include/linux/of.h:1647:34: error: 'OF_RECONFIG_UPDATE_PROPERTY' undeclared (first use in this function); did you mean 'OF_RECONFIG_CHANGE_REMOVE'?
     return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
                                     OF_RECONFIG_CHANGE_REMOVE
   make[3]: *** [scripts/Makefile.build:182: kernel/sched/rq-offsets.s] Error 1 shuffle=1571759522
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1280: prepare0] Error 2 shuffle=1571759522
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=1571759522
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2 shuffle=1571759522
   make: Target 'prepare' not remade because of errors.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for OF_DYNAMIC
   Depends on [n]: OF [=n]
   Selected by [m]:
   - NET_DSA_SJA1105 [=m] && NETDEVICES [=y] && NET_DSA [=m] && SPI [=y] && PTP_1588_CLOCK_OPTIONAL [=m]


vim +1623 include/linux/of.h

2e8fff668dc14e Rob Herring       2023-03-29  1604  
201c910bd6898d Pantelis Antoniou 2014-07-04  1605  #ifdef CONFIG_OF_DYNAMIC
f6892d193fb9d6 Grant Likely      2014-11-21  1606  extern int of_reconfig_notifier_register(struct notifier_block *);
f6892d193fb9d6 Grant Likely      2014-11-21  1607  extern int of_reconfig_notifier_unregister(struct notifier_block *);
f5242e5a883bf1 Grant Likely      2014-11-24  1608  extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
f5242e5a883bf1 Grant Likely      2014-11-24  1609  extern int of_reconfig_get_state_change(unsigned long action,
f5242e5a883bf1 Grant Likely      2014-11-24  1610  					struct of_reconfig_data *arg);
f6892d193fb9d6 Grant Likely      2014-11-21  1611  
201c910bd6898d Pantelis Antoniou 2014-07-04  1612  extern void of_changeset_init(struct of_changeset *ocs);
201c910bd6898d Pantelis Antoniou 2014-07-04  1613  extern void of_changeset_destroy(struct of_changeset *ocs);
201c910bd6898d Pantelis Antoniou 2014-07-04  1614  extern int of_changeset_apply(struct of_changeset *ocs);
201c910bd6898d Pantelis Antoniou 2014-07-04  1615  extern int of_changeset_revert(struct of_changeset *ocs);
201c910bd6898d Pantelis Antoniou 2014-07-04  1616  extern int of_changeset_action(struct of_changeset *ocs,
201c910bd6898d Pantelis Antoniou 2014-07-04  1617  		unsigned long action, struct device_node *np,
201c910bd6898d Pantelis Antoniou 2014-07-04  1618  		struct property *prop);
201c910bd6898d Pantelis Antoniou 2014-07-04  1619  
201c910bd6898d Pantelis Antoniou 2014-07-04  1620  static inline int of_changeset_attach_node(struct of_changeset *ocs,
201c910bd6898d Pantelis Antoniou 2014-07-04  1621  		struct device_node *np)
201c910bd6898d Pantelis Antoniou 2014-07-04  1622  {
201c910bd6898d Pantelis Antoniou 2014-07-04 @1623  	return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
201c910bd6898d Pantelis Antoniou 2014-07-04  1624  }
201c910bd6898d Pantelis Antoniou 2014-07-04  1625  
201c910bd6898d Pantelis Antoniou 2014-07-04  1626  static inline int of_changeset_detach_node(struct of_changeset *ocs,
201c910bd6898d Pantelis Antoniou 2014-07-04  1627  		struct device_node *np)
201c910bd6898d Pantelis Antoniou 2014-07-04  1628  {
201c910bd6898d Pantelis Antoniou 2014-07-04 @1629  	return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
201c910bd6898d Pantelis Antoniou 2014-07-04  1630  }
201c910bd6898d Pantelis Antoniou 2014-07-04  1631  
201c910bd6898d Pantelis Antoniou 2014-07-04  1632  static inline int of_changeset_add_property(struct of_changeset *ocs,
201c910bd6898d Pantelis Antoniou 2014-07-04  1633  		struct device_node *np, struct property *prop)
201c910bd6898d Pantelis Antoniou 2014-07-04  1634  {
201c910bd6898d Pantelis Antoniou 2014-07-04 @1635  	return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
201c910bd6898d Pantelis Antoniou 2014-07-04  1636  }
201c910bd6898d Pantelis Antoniou 2014-07-04  1637  
201c910bd6898d Pantelis Antoniou 2014-07-04  1638  static inline int of_changeset_remove_property(struct of_changeset *ocs,
201c910bd6898d Pantelis Antoniou 2014-07-04  1639  		struct device_node *np, struct property *prop)
201c910bd6898d Pantelis Antoniou 2014-07-04  1640  {
201c910bd6898d Pantelis Antoniou 2014-07-04 @1641  	return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
201c910bd6898d Pantelis Antoniou 2014-07-04  1642  }
201c910bd6898d Pantelis Antoniou 2014-07-04  1643  
201c910bd6898d Pantelis Antoniou 2014-07-04  1644  static inline int of_changeset_update_property(struct of_changeset *ocs,
201c910bd6898d Pantelis Antoniou 2014-07-04  1645  		struct device_node *np, struct property *prop)
201c910bd6898d Pantelis Antoniou 2014-07-04  1646  {
201c910bd6898d Pantelis Antoniou 2014-07-04 @1647  	return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
201c910bd6898d Pantelis Antoniou 2014-07-04  1648  }
b544fc2b8606d7 Lizhi Hou         2023-08-15  1649  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

[PATCH net-next 15/15] net: dsa: sja1105: permit finding the XPCS via pcs-handle

[Vladimir Oltean]

This completes support for describing the XPCS in the device tree,
rather than just the case where sja1105_fill_device_tree() populates it.
Having it in the device tree is necessary when configuring lane polarity.

Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/dsa/sja1105/sja1105_main.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 70aecdf9fd0e..e62b2facc1be 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -3035,14 +3035,26 @@ static int sja1105_port_bridge_flags(struct dsa_switch *ds, int port,
 
 static int sja1105_create_pcs(struct dsa_switch *ds, int port)
 {
+	struct dsa_port *dp = dsa_to_port(ds, port);
 	struct sja1105_private *priv = ds->priv;
+	struct fwnode_handle *pcs_fwnode;
 	struct phylink_pcs *pcs;
 
 	if (priv->phy_mode[port] != PHY_INTERFACE_MODE_SGMII &&
 	    priv->phy_mode[port] != PHY_INTERFACE_MODE_2500BASEX)
 		return 0;
 
-	pcs = xpcs_create_pcs_fwnode(priv->pcs_fwnode[port]);
+	pcs_fwnode = fwnode_handle_get(priv->pcs_fwnode[port]);
+	/* priv->pcs_fwnode[port] is only set if the PCS is absent
+	 * from the device tree source. If present, there needs to
+	 * be a pcs-handle to it.
+	 */
+	if (!pcs_fwnode)
+		pcs_fwnode = fwnode_find_reference(of_fwnode_handle(dp->dn),
+						   "pcs-handle", 0);
+
+	pcs = xpcs_create_pcs_fwnode(pcs_fwnode);
+	fwnode_handle_put(pcs_fwnode);
 	if (IS_ERR(pcs))
 		return PTR_ERR(pcs);
 
-- 
2.34.1