[PATCH net-next v9 0/6] net: stmmac: qcom-ethqos: add support for SCMI power domains

[PATCH net-next v9 0/6] net: stmmac: qcom-ethqos: add support for SCMI power domains

[Bartosz Golaszewski]

Add support for the firmware-managed variant of the DesignWare MAC on
the sa8255p platform. This series contains new DT bindings and driver
changes required to support the MAC in the STMMAC driver.

It also reorganizes the ethqos code quite a bit to make the introduction
of power domains into the driver a bit easier on the eye.

The DTS changes will go in separately.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
Changes in v9:
- Rebase on top of current linux-next again
- Link to v8: https://patch.msgid.link/20260311-qcom-sa8255p-emac-v8-0-58227bcf1018@oss.qualcomm.com

Changes in v8:
- Rebase on top of recent changes in linux-next which required an
  extensive rework
- Drop partial R-b tags
- Link to v7: https://patch.msgid.link/20260306-qcom-sa8255p-emac-v7-0-d6a3013094b7@oss.qualcomm.com

Changes in v7:
- Restored the correct authorship after learning git uses .mailmap for
  the --author switch
- Rebased on top of changes from Russell
- Fixed resource management issues in error paths
- Link to v6: https://lore.kernel.org/r/20260112-qcom-sa8255p-emac-v6-0-86a3d4b2ad83@oss.qualcomm.com

Changes in v6:
- Fix $id value in the bindings
- Drop patch 3/8 from the series
- Update init/exit callback signatures
- Link to v5: https://lore.kernel.org/r/20251107-qcom-sa8255p-emac-v5-0-01d3e3aaf388@linaro.org
- Link to v6: https://lore.kernel.org/r/20251219-qcom-sa8255p-emac-v6-0-487f1082461e@oss.qualcomm.com

Changes in v5:
- Name the DT binding document after the new compatbile
- Add missing space
- Make the power-domains limits stricter
- Link to v4: https://lore.kernel.org/r/20251104-qcom-sa8255p-emac-v4-0-f76660087cea@linaro.org

Changes in v4:
- Remove the phys property from the SCMI bindings
- Mark the power-domain-names property as required
- Set maxItems for power-domains to 1 for all existing bindings to
  maintain the current requirements after modifying the value in the
  top-level document
- Link to v3: https://lore.kernel.org/r/20251027-qcom-sa8255p-emac-v3-0-75767b9230ab@linaro.org

Changes in v3:
- Drop 'power' and 'perf' prefixes from power domain names
- Rebase on top of Russell's changes to dwmac
- Rebase on top of even more changes from Russell that are not yet
  in next (E1vB6ld-0000000BIPy-2Qi4@rmk-PC.armlinux.org.uk)
- Link to v2: https://lore.kernel.org/all/20251008-qcom-sa8255p-emac-v2-0-92bc29309fce@linaro.org/

Changes in v2:
- Fix the power-domains property in DT bindings
- Rework the DT bindings example
- Drop the DTS patch, it will go upstream separately
- Link to v1: https://lore.kernel.org/r/20250910-qcom-sa8255p-emac-v1-0-32a79cf1e668@linaro.org

---
Bartosz Golaszewski (6):
      dt-bindings: net: qcom: document the ethqos device for SCMI-based systems
      net: stmmac: qcom-ethqos: use generic device properties
      net: stmmac: qcom-ethqos: wrap emac driver data in additional structure
      net: stmmac: qcom-ethqos: split power management fields into a separate structure
      net: stmmac: qcom-ethqos: split power management context into a separate struct
      net: stmmac: qcom-ethqos: add support for sa8255p

 .../bindings/net/allwinner,sun7i-a20-gmac.yaml     |   3 +
 .../bindings/net/altr,socfpga-stmmac.yaml          |   3 +
 .../bindings/net/amlogic,meson-dwmac.yaml          |   3 +
 .../devicetree/bindings/net/eswin,eic7700-eth.yaml |   3 +
 .../devicetree/bindings/net/intel,dwmac-plat.yaml  |   3 +
 .../bindings/net/loongson,ls1b-gmac.yaml           |   3 +
 .../bindings/net/loongson,ls1c-emac.yaml           |   3 +
 .../devicetree/bindings/net/nxp,dwmac-imx.yaml     |   3 +
 .../devicetree/bindings/net/nxp,lpc1850-dwmac.yaml |   3 +
 .../devicetree/bindings/net/nxp,s32-dwmac.yaml     |   3 +
 .../devicetree/bindings/net/qcom,ethqos.yaml       |   3 +
 .../bindings/net/qcom,sa8255p-ethqos.yaml          |  98 +++++
 .../devicetree/bindings/net/renesas,rzn1-gmac.yaml |   3 +
 .../bindings/net/renesas,rzv2h-gbeth.yaml          |   3 +
 .../devicetree/bindings/net/rockchip-dwmac.yaml    |   3 +
 .../devicetree/bindings/net/snps,dwmac.yaml        |   5 +-
 .../bindings/net/sophgo,cv1800b-dwmac.yaml         |   3 +
 .../bindings/net/sophgo,sg2044-dwmac.yaml          |   3 +
 .../bindings/net/starfive,jh7110-dwmac.yaml        |   3 +
 .../devicetree/bindings/net/stm32-dwmac.yaml       |   3 +
 .../devicetree/bindings/net/tesla,fsd-ethqos.yaml  |   3 +
 .../devicetree/bindings/net/thead,th1520-gmac.yaml |   3 +
 .../bindings/net/toshiba,visconti-dwmac.yaml       |   3 +
 MAINTAINERS                                        |   1 +
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |   2 +-
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    | 401 +++++++++++++++++----
 26 files changed, 498 insertions(+), 72 deletions(-)
---
base-commit: dac1315bf558e4895665aa1c278fd30113ca119d
change-id: 20250704-qcom-sa8255p-emac-8460235ac512

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

[PATCH net-next v9 1/6] dt-bindings: net: qcom: document the ethqos device for SCMI-based systems

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Describe the firmware-managed variant of the QCom DesignWare MAC. As the
properties here differ a lot from the HLOS-managed variant, lets put it
in a separate file. Since we need to update the maximum number of power
domains, let's update existing bindings referencing the top-level
snps,dwmac.yaml and limit their maxItems for power-domains to 1.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
 .../bindings/net/allwinner,sun7i-a20-gmac.yaml     |  3 +
 .../bindings/net/altr,socfpga-stmmac.yaml          |  3 +
 .../bindings/net/amlogic,meson-dwmac.yaml          |  3 +
 .../devicetree/bindings/net/eswin,eic7700-eth.yaml |  3 +
 .../devicetree/bindings/net/intel,dwmac-plat.yaml  |  3 +
 .../bindings/net/loongson,ls1b-gmac.yaml           |  3 +
 .../bindings/net/loongson,ls1c-emac.yaml           |  3 +
 .../devicetree/bindings/net/nxp,dwmac-imx.yaml     |  3 +
 .../devicetree/bindings/net/nxp,lpc1850-dwmac.yaml |  3 +
 .../devicetree/bindings/net/nxp,s32-dwmac.yaml     |  3 +
 .../devicetree/bindings/net/qcom,ethqos.yaml       |  3 +
 .../bindings/net/qcom,sa8255p-ethqos.yaml          | 98 ++++++++++++++++++++++
 .../devicetree/bindings/net/renesas,rzn1-gmac.yaml |  3 +
 .../bindings/net/renesas,rzv2h-gbeth.yaml          |  3 +
 .../devicetree/bindings/net/rockchip-dwmac.yaml    |  3 +
 .../devicetree/bindings/net/snps,dwmac.yaml        |  5 +-
 .../bindings/net/sophgo,cv1800b-dwmac.yaml         |  3 +
 .../bindings/net/sophgo,sg2044-dwmac.yaml          |  3 +
 .../bindings/net/starfive,jh7110-dwmac.yaml        |  3 +
 .../devicetree/bindings/net/stm32-dwmac.yaml       |  3 +
 .../devicetree/bindings/net/tesla,fsd-ethqos.yaml  |  3 +
 .../devicetree/bindings/net/thead,th1520-gmac.yaml |  3 +
 .../bindings/net/toshiba,visconti-dwmac.yaml       |  3 +
 MAINTAINERS                                        |  1 +
 24 files changed, 166 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml b/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml
index 23e92be33ac8609a16db530782989caed22a5730..b12632545673b2ad0148a677f45a7447309a43cd 100644
--- a/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml
@@ -40,6 +40,9 @@ properties:
     description:
       PHY regulator
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml b/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml
index fc445ad5a1f1ac490e921696d6f7ca83d15de459..448e617cddc4cda8dbc77e83324495ffd5dfb9be 100644
--- a/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml
+++ b/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml
@@ -140,6 +140,9 @@ properties:
           - description: offset of the control register
           - description: shift within the control register
 
+  power-domains:
+    maxItems: 1
+
 patternProperties:
   "^mdio[0-9]$":
     type: object
diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
index 5c91716d1f21e617543b03c5a90b993f8aee053c..9c9cc3ef384da0270489c21b3426572ea46d9499 100644
--- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
@@ -158,6 +158,9 @@ properties:
   interrupt-names:
     const: macirq
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml b/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml
index 91e8cd1db67b8e14961497a7254e6b01dc4e582a..c1b67cfa76d070d5e8349d5e92ce6bc4bf2ab67c 100644
--- a/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml
+++ b/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml
@@ -83,6 +83,9 @@ properties:
                          register
           - description: Offset of register controlling TX/RX clock delay
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml b/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml
index 62c1da36a2b5a29290e5e01be87c48158c4adf89..e41851931b947559c89b0cd6f4756f71046f9594 100644
--- a/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml
+++ b/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml
@@ -47,6 +47,9 @@ properties:
   interrupt-names:
     const: macirq
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - clocks
diff --git a/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml b/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
index c4f3224bad387b87a5b4a3049dabd75f2c4bd42f..c9a131b8d8304c41559a416b324df749c0a87d14 100644
--- a/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
@@ -66,6 +66,9 @@ properties:
       - mii
       - rgmii-id
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml b/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
index 99001b940b8361f69bb917617f857ee99f4b3fa5..49db18423dd807683b9bb297978f5da8ea6cee3d 100644
--- a/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
+++ b/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
@@ -65,6 +65,9 @@ properties:
       - mii
       - rmii
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml b/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
index e5db346beca9649be4f97727b78fda8973095912..b240c76e7dd5254d0c3752610c4aa848a3c3d65b 100644
--- a/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
@@ -83,6 +83,9 @@ properties:
     description:
       To select RMII reference clock from external.
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - clocks
diff --git a/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml
index 05acd9bc7616356e68090ebdd4df20e42f70dd7e..f61188ab0dbe3c0cec5b10f7a65dfaff4dc3898f 100644
--- a/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml
@@ -51,6 +51,9 @@ properties:
     items:
       - const: stmmaceth
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
index 1b2934f3c87ca21ec67369fc34b3234cc3d9d60c..aa8772e77385ff265510a5d53b5c9e7e9ced086a 100644
--- a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
@@ -64,6 +64,9 @@ properties:
       - const: rx
       - const: ptp_ref
 
+  power-domains:
+    maxItems: 1
+
 required:
   - clocks
   - clock-names
diff --git a/Documentation/devicetree/bindings/net/qcom,ethqos.yaml b/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
index 423959cb928d945aa3e758a3c803d12bd61ec42b..ef520f8105773e22c0536ff419dad55fe316e1bd 100644
--- a/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
+++ b/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
@@ -86,6 +86,9 @@ properties:
   phy-names:
     const: serdes
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - clocks
diff --git a/Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml b/Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..72bb764c0ca046e0df4bbffe6c323850f5231787
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/qcom,sa8255p-ethqos.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Ethernet ETHQOS device (firmware managed)
+
+maintainers:
+  - Bjorn Andersson <andersson@kernel.org>
+  - Konrad Dybcio <konradybcio@kernel.org>
+  - Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
+
+description:
+  dwmmac based Qualcomm ethernet devices which support Gigabit
+  ethernet (version v2.3.0 and onwards) with clocks, interconnects, etc.
+  managed by firmware
+
+allOf:
+  - $ref: snps,dwmac.yaml#
+
+properties:
+  compatible:
+    const: qcom,sa8255p-ethqos
+
+  reg:
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: stmmaceth
+      - const: rgmii
+
+  interrupts:
+    items:
+      - description: Combined signal for various interrupt events
+      - description: The interrupt that occurs when HW safety error triggered
+
+  interrupt-names:
+    items:
+      - const: macirq
+      - const: sfty
+
+  power-domains:
+    minItems: 3
+    maxItems: 3
+
+  power-domain-names:
+    items:
+      - const: core
+      - const: mdio
+      - const: serdes
+
+  iommus:
+    maxItems: 1
+
+  dma-coherent: true
+
+required:
+  - compatible
+  - reg-names
+  - power-domains
+  - power-domain-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    ethernet: ethernet@7a80000 {
+        compatible = "qcom,sa8255p-ethqos";
+        reg = <0x23040000 0x10000>,
+              <0x23056000 0x100>;
+        reg-names = "stmmaceth", "rgmii";
+
+        iommus = <&apps_smmu 0x120 0x7>;
+
+        interrupts = <GIC_SPI 946 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 782 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "macirq", "sfty";
+
+        dma-coherent;
+
+        snps,tso;
+        snps,pbl = <32>;
+        rx-fifo-depth = <16384>;
+        tx-fifo-depth = <16384>;
+
+        phy-handle = <&ethernet_phy>;
+        phy-mode = "2500base-x";
+
+        snps,mtl-rx-config = <&mtl_rx_setup1>;
+        snps,mtl-tx-config = <&mtl_tx_setup1>;
+
+        power-domains = <&scmi8_pd 0>, <&scmi8_pd 1>, <&scmi8_dvfs 0>;
+        power-domain-names = "core", "mdio", "serdes";
+    };
diff --git a/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
index 16dd7a2631abf6fb7dc8e0c90755ab1e81915b38..ed0d10a19ca4c47c05f6873c64b0537b90acd15a 100644
--- a/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
@@ -44,6 +44,9 @@ properties:
       phandle pointing to a PCS sub-node compatible with
       renesas,rzn1-miic.yaml#
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
 
diff --git a/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml b/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml
index 2125b5ddf73dadd8b0d372e83a6b5c4624f5e648..8338834f49cd21df6c697a1f52a8b195c0208c23 100644
--- a/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml
@@ -154,6 +154,9 @@ properties:
       Documentation/devicetree/bindings/net/pcs/renesas,rzn1-miic.yaml#
       (Refer RZ/T2H portion in the DT-binding file)
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml b/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
index 80c252845349c4533deff85b052157984d0e2f23..3ec3f6dc2a125908ba98f20b1120311de8967954 100644
--- a/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
@@ -123,6 +123,9 @@ properties:
   phy-supply:
     description: PHY regulator
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - clocks
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 38bc34dc4f09b75f8f78ffa383f7e5ae6be9fb72..9d48ff4623895d93d63e710c6cc1c4c88671bb16 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -71,6 +71,7 @@ properties:
         - loongson,ls7a-dwmac
         - nxp,s32g2-dwmac
         - qcom,qcs404-ethqos
+        - qcom,sa8255p-ethqos
         - qcom,sa8775p-ethqos
         - qcom,sc8280xp-ethqos
         - qcom,sm8150-ethqos
@@ -183,7 +184,8 @@ properties:
           - const: ahb
 
   power-domains:
-    maxItems: 1
+    minItems: 1
+    maxItems: 3
 
   mac-mode:
     $ref: ethernet-controller.yaml#/properties/phy-connection-type
@@ -646,6 +648,7 @@ allOf:
                 - ingenic,x1830-mac
                 - ingenic,x2000-mac
                 - qcom,qcs404-ethqos
+                - qcom,sa8255p-ethqos
                 - qcom,sa8775p-ethqos
                 - qcom,sc8280xp-ethqos
                 - qcom,sm8150-ethqos
diff --git a/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
index b89456f0ef830991135bd17626da98661429596c..e78cbf594c695204040a53ab1e367daa9e12246b 100644
--- a/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
@@ -49,6 +49,9 @@ properties:
   reset-names:
     const: stmmaceth
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
index e8d3814db0e94fdcd0f3ab2a9fa8bab972a97ab5..845e2c67d20037496bb1eec6eb73c99cde74e944 100644
--- a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
@@ -52,6 +52,9 @@ properties:
   interrupt-names:
     maxItems: 1
 
+  power-domains:
+    maxItems: 1
+
   resets:
     maxItems: 1
 
diff --git a/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml b/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
index 313a15331661208a1fa64386739d87a4f11b7e20..8a68c6d7b5c6d6629a780d002299d767088def77 100644
--- a/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
@@ -71,6 +71,9 @@ properties:
       The argument one is the offset of phy mode selection, the
       argument two is the shift of phy mode selection.
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
index 987254900d0da7aab81237f20b1540ad8a17bd21..29b878079ff0c1a0ef95fc63f2035f478ee039b2 100644
--- a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
@@ -121,6 +121,9 @@ properties:
     minItems: 1
     maxItems: 2
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - clocks
diff --git a/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml b/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml
index dd7481bb16e59982c26c1a54ae82b8cff85fdfe0..ad635529d676ed6b752ab3bde5152d5cbddcb519 100644
--- a/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml
+++ b/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml
@@ -67,6 +67,9 @@ properties:
       - rgmii-rxid
       - rgmii-txid
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml b/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
index b3492a9aa4effa73fadf92a63a76ba8bb65a8769..c859f8bb5d582af8b8782f2f89ab5e6ee3d7a46c 100644
--- a/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
@@ -78,6 +78,9 @@ properties:
     items:
       - const: macirq
 
+  power-domains:
+    maxItems: 1
+
 required:
   - clocks
   - clock-names
diff --git a/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml b/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
index f0f32e18fc8550e6f63b87b60a095972453836c9..efa39eab0256a1102b01872bd848749788c9b4e8 100644
--- a/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
@@ -48,6 +48,9 @@ properties:
   interrupt-names:
     const: macirq
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/MAINTAINERS b/MAINTAINERS
index 4efaa76a0e6da830438661d2e5eb5095e4eb5020..9269975a7c76a23a9ac9a1106dbb357d8c75c3c4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21760,6 +21760,7 @@ L:	netdev@vger.kernel.org
 L:	linux-arm-msm@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/net/qcom,ethqos.yaml
+F:	Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml
 F:	drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
 
 QUALCOMM FASTRPC DRIVER

-- 
2.47.3

[PATCH net-next v9 2/6] net: stmmac: qcom-ethqos: use generic device properties

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

In order to drop the dependency on CONFIG_OF, convert all device property
getters from OF-specific to generic device properties and stop pulling
in any linux/of.h symbols.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
 drivers/net/ethernet/stmicro/stmmac/Kconfig             | 2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 9 ++++-----
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 07088d03dbab5bd1abf66e9460613b839c1d565e..e2af4fdd654340d618477ed87d3889dbb9aab456 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -135,7 +135,7 @@ config DWMAC_MESON
 config DWMAC_QCOM_ETHQOS
 	tristate "Qualcomm ETHQOS support"
 	default ARCH_QCOM
-	depends on OF && (ARCH_QCOM || COMPILE_TEST)
+	depends on ARCH_QCOM || COMPILE_TEST
 	help
 	  Support for the Qualcomm ETHQOS core.
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 3ccf20fdf52a8ec4649b43ade8ee7b85d613e1c5..66fd2ed2c2c8428694c07d89220d0e1608546791 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0
 // Copyright (c) 2018-19, Linaro Limited
 
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of.h>
 #include <linux/of_net.h>
 #include <linux/platform_device.h>
 #include <linux/phy.h>
@@ -728,7 +728,6 @@ static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv)
 
 static int qcom_ethqos_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	const struct ethqos_emac_driver_data *data;
 	struct plat_stmmacenet_data *plat_dat;
 	struct stmmac_resources stmmac_res;
@@ -778,7 +777,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, PTR_ERR(ethqos->rgmii_base),
 				     "Failed to map rgmii resource\n");
 
-	data = of_device_get_match_data(dev);
+	data = device_get_match_data(dev);
 	ethqos->rgmii_por = data->rgmii_por;
 	ethqos->num_rgmii_por = data->num_rgmii_por;
 	ethqos->rgmii_config_loopback_en = data->rgmii_config_loopback_en;
@@ -818,9 +817,9 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	if (ethqos->has_emac_ge_3)
 		plat_dat->dwmac4_addrs = &data->dwmac4_addrs;
 	plat_dat->pmt = true;
-	if (of_property_read_bool(np, "snps,tso"))
+	if (device_property_present(dev, "snps,tso"))
 		plat_dat->flags |= STMMAC_FLAG_TSO_EN;
-	if (of_device_is_compatible(np, "qcom,qcs404-ethqos"))
+	if (device_is_compatible(dev, "qcom,qcs404-ethqos"))
 		plat_dat->flags |= STMMAC_FLAG_RX_CLK_RUNS_IN_LPI;
 	if (data->dma_addr_width)
 		plat_dat->host_dma_width = data->dma_addr_width;

-- 
2.47.3

[PATCH net-next v9 3/6] net: stmmac: qcom-ethqos: wrap emac driver data in additional structure

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

As the first step in enabling power domain support in the driver, we'll
split the device match data and runtime data structures into their
general and power-management-specific parts. To allow that: first wrap
the emac driver data in another layer which will later be expanded.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    | 52 +++++++++++++++-------
 1 file changed, 37 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 66fd2ed2c2c8428694c07d89220d0e1608546791..8fda6c128117d7f5b1dece68c919f2a09a511210 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -97,6 +97,10 @@ struct ethqos_emac_driver_data {
 	bool needs_sgmii_loopback;
 };
 
+struct ethqos_emac_match_data {
+	const struct ethqos_emac_driver_data *drv_data;
+};
+
 struct qcom_ethqos {
 	struct platform_device *pdev;
 	void __iomem *rgmii_base;
@@ -223,6 +227,10 @@ static const struct ethqos_emac_driver_data emac_v2_3_0_data = {
 	.has_emac_ge_3 = false,
 };
 
+static const struct ethqos_emac_match_data emac_qcs404_data = {
+	.drv_data = &emac_v2_3_0_data,
+};
+
 static const struct ethqos_emac_por emac_v2_1_0_por[] = {
 	{ .offset = RGMII_IO_MACRO_CONFIG,	.value = 0x40C01343 },
 	{ .offset = SDCC_HC_REG_DLL_CONFIG,	.value = 0x2004642C },
@@ -239,6 +247,10 @@ static const struct ethqos_emac_driver_data emac_v2_1_0_data = {
 	.has_emac_ge_3 = false,
 };
 
+static const struct ethqos_emac_match_data emac_sm8150_data = {
+	.drv_data = &emac_v2_1_0_data,
+};
+
 static const struct ethqos_emac_por emac_v3_0_0_por[] = {
 	{ .offset = RGMII_IO_MACRO_CONFIG,	.value = 0x40c01343 },
 	{ .offset = SDCC_HC_REG_DLL_CONFIG,	.value = 0x2004642c },
@@ -271,6 +283,10 @@ static const struct ethqos_emac_driver_data emac_v3_0_0_data = {
 	},
 };
 
+static const struct ethqos_emac_match_data emac_sc8280xp_data = {
+	.drv_data = &emac_v3_0_0_data,
+};
+
 static const struct ethqos_emac_por emac_v4_0_0_por[] = {
 	{ .offset = RGMII_IO_MACRO_CONFIG,	.value = 0x40c01343 },
 	{ .offset = SDCC_HC_REG_DLL_CONFIG,	.value = 0x2004642c },
@@ -306,6 +322,10 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
 	},
 };
 
+static const struct ethqos_emac_match_data emac_sa8775p_data = {
+	.drv_data = &emac_v4_0_0_data,
+};
+
 static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 {
 	struct device *dev = &ethqos->pdev->dev;
@@ -728,7 +748,8 @@ static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv)
 
 static int qcom_ethqos_probe(struct platform_device *pdev)
 {
-	const struct ethqos_emac_driver_data *data;
+	const struct ethqos_emac_driver_data *drv_data;
+	const struct ethqos_emac_match_data *data;
 	struct plat_stmmacenet_data *plat_dat;
 	struct stmmac_resources stmmac_res;
 	struct device *dev = &pdev->dev;
@@ -778,13 +799,14 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 				     "Failed to map rgmii resource\n");
 
 	data = device_get_match_data(dev);
-	ethqos->rgmii_por = data->rgmii_por;
-	ethqos->num_rgmii_por = data->num_rgmii_por;
-	ethqos->rgmii_config_loopback_en = data->rgmii_config_loopback_en;
-	ethqos->has_emac_ge_3 = data->has_emac_ge_3;
-	ethqos->needs_sgmii_loopback = data->needs_sgmii_loopback;
-
-	ethqos->link_clk = devm_clk_get(dev, data->link_clk_name ?: "rgmii");
+	drv_data = data->drv_data;
+	ethqos->rgmii_por = drv_data->rgmii_por;
+	ethqos->num_rgmii_por = drv_data->num_rgmii_por;
+	ethqos->rgmii_config_loopback_en = drv_data->rgmii_config_loopback_en;
+	ethqos->has_emac_ge_3 = drv_data->has_emac_ge_3;
+	ethqos->needs_sgmii_loopback = drv_data->needs_sgmii_loopback;
+
+	ethqos->link_clk = devm_clk_get(dev, drv_data->link_clk_name ?: "rgmii");
 	if (IS_ERR(ethqos->link_clk))
 		return dev_err_probe(dev, PTR_ERR(ethqos->link_clk),
 				     "Failed to get link_clk\n");
@@ -815,14 +837,14 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	plat_dat->ptp_clk_freq_config = ethqos_ptp_clk_freq_config;
 	plat_dat->core_type = DWMAC_CORE_GMAC4;
 	if (ethqos->has_emac_ge_3)
-		plat_dat->dwmac4_addrs = &data->dwmac4_addrs;
+		plat_dat->dwmac4_addrs = &drv_data->dwmac4_addrs;
 	plat_dat->pmt = true;
 	if (device_property_present(dev, "snps,tso"))
 		plat_dat->flags |= STMMAC_FLAG_TSO_EN;
 	if (device_is_compatible(dev, "qcom,qcs404-ethqos"))
 		plat_dat->flags |= STMMAC_FLAG_RX_CLK_RUNS_IN_LPI;
-	if (data->dma_addr_width)
-		plat_dat->host_dma_width = data->dma_addr_width;
+	if (drv_data->dma_addr_width)
+		plat_dat->host_dma_width = drv_data->dma_addr_width;
 
 	if (ethqos->serdes_phy) {
 		plat_dat->serdes_powerup = qcom_ethqos_serdes_powerup;
@@ -837,10 +859,10 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id qcom_ethqos_match[] = {
-	{ .compatible = "qcom,qcs404-ethqos", .data = &emac_v2_3_0_data},
-	{ .compatible = "qcom,sa8775p-ethqos", .data = &emac_v4_0_0_data},
-	{ .compatible = "qcom,sc8280xp-ethqos", .data = &emac_v3_0_0_data},
-	{ .compatible = "qcom,sm8150-ethqos", .data = &emac_v2_1_0_data},
+	{ .compatible = "qcom,qcs404-ethqos", .data = &emac_qcs404_data},
+	{ .compatible = "qcom,sa8775p-ethqos", .data = &emac_sa8775p_data},
+	{ .compatible = "qcom,sc8280xp-ethqos", .data = &emac_sc8280xp_data},
+	{ .compatible = "qcom,sm8150-ethqos", .data = &emac_sm8150_data},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, qcom_ethqos_match);

-- 
2.47.3

[PATCH net-next v9 4/6] net: stmmac: qcom-ethqos: split power management fields into a separate structure

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Now that we have a separate wrapper for device match data, let's extend
this structure with a pointer to the structure containing fields related
to power-management only. This is done because a device may have the
same device settings but different power management mode (e.g.: firmware
vs manual).

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c   | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 8fda6c128117d7f5b1dece68c919f2a09a511210..cbfae18773c1193cd640f07824f5a66d68f9634b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -92,13 +92,17 @@ struct ethqos_emac_driver_data {
 	bool rgmii_config_loopback_en;
 	bool has_emac_ge_3;
 	u8 dma_addr_width;
-	const char *link_clk_name;
 	struct dwmac4_addrs dwmac4_addrs;
 	bool needs_sgmii_loopback;
 };
 
+struct ethqos_emac_pm_data {
+	const char *link_clk_name;
+};
+
 struct ethqos_emac_match_data {
 	const struct ethqos_emac_driver_data *drv_data;
+	const struct ethqos_emac_pm_data *pm_data;
 };
 
 struct qcom_ethqos {
@@ -301,7 +305,6 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
 	.num_rgmii_por = ARRAY_SIZE(emac_v4_0_0_por),
 	.rgmii_config_loopback_en = false,
 	.has_emac_ge_3 = true,
-	.link_clk_name = "phyaux",
 	.needs_sgmii_loopback = true,
 	.dma_addr_width = 36,
 	.dwmac4_addrs = {
@@ -322,8 +325,13 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
 	},
 };
 
+static const struct ethqos_emac_pm_data emac_sa8775p_pm_data = {
+	.link_clk_name = "phyaux",
+};
+
 static const struct ethqos_emac_match_data emac_sa8775p_data = {
 	.drv_data = &emac_v4_0_0_data,
+	.pm_data = &emac_sa8775p_pm_data,
 };
 
 static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
@@ -749,11 +757,13 @@ static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv)
 static int qcom_ethqos_probe(struct platform_device *pdev)
 {
 	const struct ethqos_emac_driver_data *drv_data;
+	const struct ethqos_emac_pm_data *pm_data;
 	const struct ethqos_emac_match_data *data;
 	struct plat_stmmacenet_data *plat_dat;
 	struct stmmac_resources stmmac_res;
 	struct device *dev = &pdev->dev;
 	struct qcom_ethqos *ethqos;
+	const char *clk_name;
 	int ret, i;
 
 	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
@@ -800,13 +810,16 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 
 	data = device_get_match_data(dev);
 	drv_data = data->drv_data;
+	pm_data = data->pm_data;
+	clk_name = pm_data && pm_data->link_clk_name ? pm_data->link_clk_name : "rgmii";
+
 	ethqos->rgmii_por = drv_data->rgmii_por;
 	ethqos->num_rgmii_por = drv_data->num_rgmii_por;
 	ethqos->rgmii_config_loopback_en = drv_data->rgmii_config_loopback_en;
 	ethqos->has_emac_ge_3 = drv_data->has_emac_ge_3;
 	ethqos->needs_sgmii_loopback = drv_data->needs_sgmii_loopback;
 
-	ethqos->link_clk = devm_clk_get(dev, drv_data->link_clk_name ?: "rgmii");
+	ethqos->link_clk = devm_clk_get(dev, clk_name);
 	if (IS_ERR(ethqos->link_clk))
 		return dev_err_probe(dev, PTR_ERR(ethqos->link_clk),
 				     "Failed to get link_clk\n");

-- 
2.47.3

[PATCH net-next v9 5/6] net: stmmac: qcom-ethqos: split power management context into a separate struct

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

With match data split into general and power-management sections, let's
now do the same with runtime device data.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    | 40 ++++++++++++----------
 1 file changed, 22 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index cbfae18773c1193cd640f07824f5a66d68f9634b..f32ff0d9ce513d8270c8db9c549a79778549df59 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -105,14 +105,18 @@ struct ethqos_emac_match_data {
 	const struct ethqos_emac_pm_data *pm_data;
 };
 
+struct ethqos_emac_pm_ctx {
+	struct clk *link_clk;
+	struct phy *serdes_phy;
+};
+
 struct qcom_ethqos {
 	struct platform_device *pdev;
 	void __iomem *rgmii_base;
 	void (*configure_func)(struct qcom_ethqos *ethqos,
 			       phy_interface_t interface, int speed);
 
-	struct clk *link_clk;
-	struct phy *serdes_phy;
+	struct ethqos_emac_pm_ctx pm;
 	phy_interface_t phy_mode;
 
 	const struct ethqos_emac_por *rgmii_por;
@@ -194,7 +198,7 @@ static int ethqos_set_clk_tx_rate(void *bsp_priv, struct clk *clk_tx_i,
 	if (rate < 0)
 		return rate;
 
-	return clk_set_rate(ethqos->link_clk, rate * 2);
+	return clk_set_rate(ethqos->pm.link_clk, rate * 2);
 }
 
 static void
@@ -670,13 +674,13 @@ static int qcom_ethqos_serdes_powerup(struct net_device *ndev, void *priv)
 	struct qcom_ethqos *ethqos = priv;
 	int ret;
 
-	ret = phy_init(ethqos->serdes_phy);
+	ret = phy_init(ethqos->pm.serdes_phy);
 	if (ret)
 		return ret;
 
-	ret = phy_power_on(ethqos->serdes_phy);
+	ret = phy_power_on(ethqos->pm.serdes_phy);
 	if (ret)
-		phy_exit(ethqos->serdes_phy);
+		phy_exit(ethqos->pm.serdes_phy);
 
 	return ret;
 }
@@ -685,8 +689,8 @@ static void qcom_ethqos_serdes_powerdown(struct net_device *ndev, void *priv)
 {
 	struct qcom_ethqos *ethqos = priv;
 
-	phy_power_off(ethqos->serdes_phy);
-	phy_exit(ethqos->serdes_phy);
+	phy_power_off(ethqos->pm.serdes_phy);
+	phy_exit(ethqos->pm.serdes_phy);
 }
 
 static int ethqos_mac_finish_serdes(struct net_device *ndev, void *priv,
@@ -700,7 +704,7 @@ static int ethqos_mac_finish_serdes(struct net_device *ndev, void *priv,
 
 	if (interface == PHY_INTERFACE_MODE_SGMII ||
 	    interface == PHY_INTERFACE_MODE_2500BASEX)
-		ret = phy_set_mode_ext(ethqos->serdes_phy, PHY_MODE_ETHERNET,
+		ret = phy_set_mode_ext(ethqos->pm.serdes_phy, PHY_MODE_ETHERNET,
 				       interface);
 
 	return ret;
@@ -712,7 +716,7 @@ static int ethqos_clks_config(void *priv, bool enabled)
 	int ret = 0;
 
 	if (enabled) {
-		ret = clk_prepare_enable(ethqos->link_clk);
+		ret = clk_prepare_enable(ethqos->pm.link_clk);
 		if (ret) {
 			dev_err(&ethqos->pdev->dev, "link_clk enable failed\n");
 			return ret;
@@ -726,7 +730,7 @@ static int ethqos_clks_config(void *priv, bool enabled)
 		qcom_ethqos_set_sgmii_loopback(ethqos, true);
 		ethqos_set_func_clk_en(ethqos);
 	} else {
-		clk_disable_unprepare(ethqos->link_clk);
+		clk_disable_unprepare(ethqos->pm.link_clk);
 	}
 
 	return ret;
@@ -819,9 +823,9 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	ethqos->has_emac_ge_3 = drv_data->has_emac_ge_3;
 	ethqos->needs_sgmii_loopback = drv_data->needs_sgmii_loopback;
 
-	ethqos->link_clk = devm_clk_get(dev, clk_name);
-	if (IS_ERR(ethqos->link_clk))
-		return dev_err_probe(dev, PTR_ERR(ethqos->link_clk),
+	ethqos->pm.link_clk = devm_clk_get(dev, clk_name);
+	if (IS_ERR(ethqos->pm.link_clk))
+		return dev_err_probe(dev, PTR_ERR(ethqos->pm.link_clk),
 				     "Failed to get link_clk\n");
 
 	ret = ethqos_clks_config(ethqos, true);
@@ -832,9 +836,9 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ethqos->serdes_phy = devm_phy_optional_get(dev, "serdes");
-	if (IS_ERR(ethqos->serdes_phy))
-		return dev_err_probe(dev, PTR_ERR(ethqos->serdes_phy),
+	ethqos->pm.serdes_phy = devm_phy_optional_get(dev, "serdes");
+	if (IS_ERR(ethqos->pm.serdes_phy))
+		return dev_err_probe(dev, PTR_ERR(ethqos->pm.serdes_phy),
 				     "Failed to get serdes phy\n");
 
 	ethqos_set_clk_tx_rate(ethqos, NULL, plat_dat->phy_interface,
@@ -859,7 +863,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	if (drv_data->dma_addr_width)
 		plat_dat->host_dma_width = drv_data->dma_addr_width;
 
-	if (ethqos->serdes_phy) {
+	if (ethqos->pm.serdes_phy) {
 		plat_dat->serdes_powerup = qcom_ethqos_serdes_powerup;
 		plat_dat->serdes_powerdown  = qcom_ethqos_serdes_powerdown;
 	}

-- 
2.47.3

[PATCH net-next v9 6/6] net: stmmac: qcom-ethqos: add support for sa8255p

[Bartosz Golaszewski]

Extend the driver to support a new model - sa8255p. Unlike the
previously supported variants, this one's power management is done in
the firmware using SCMI. This is modeled in linux using power domains so
add support for them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    | 301 ++++++++++++++++++---
 1 file changed, 262 insertions(+), 39 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index f32ff0d9ce513d8270c8db9c549a79778549df59..09ce80b446cbac8bf85d974a3d6517e037b049c1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -7,6 +7,8 @@
 #include <linux/platform_device.h>
 #include <linux/phy.h>
 #include <linux/phy/phy.h>
+#include <linux/pm_opp.h>
+#include <linux/pm_domain.h>
 
 #include "stmmac.h"
 #include "stmmac_platform.h"
@@ -81,6 +83,13 @@
 
 #define SGMII_10M_RX_CLK_DVDR			0x31
 
+enum ethqos_pd_selector {
+	ETHQOS_PD_CORE = 0,
+	ETHQOS_PD_MDIO,
+	ETHQOS_PD_SERDES,
+	ETHQOS_NUM_PDS,
+};
+
 struct ethqos_emac_por {
 	unsigned int offset;
 	unsigned int value;
@@ -98,6 +107,9 @@ struct ethqos_emac_driver_data {
 
 struct ethqos_emac_pm_data {
 	const char *link_clk_name;
+	bool use_domains;
+	struct dev_pm_domain_attach_data pd;
+	unsigned int clk_ptp_rate;
 };
 
 struct ethqos_emac_match_data {
@@ -110,13 +122,21 @@ struct ethqos_emac_pm_ctx {
 	struct phy *serdes_phy;
 };
 
+struct ethqos_emac_pd_ctx {
+	struct dev_pm_domain_list *pd_list;
+	int serdes_level;
+};
+
 struct qcom_ethqos {
 	struct platform_device *pdev;
 	void __iomem *rgmii_base;
 	void (*configure_func)(struct qcom_ethqos *ethqos,
 			       phy_interface_t interface, int speed);
 
-	struct ethqos_emac_pm_ctx pm;
+	union {
+		struct ethqos_emac_pm_ctx pm;
+		struct ethqos_emac_pd_ctx pd;
+	};
 	phy_interface_t phy_mode;
 
 	const struct ethqos_emac_por *rgmii_por;
@@ -338,6 +358,25 @@ static const struct ethqos_emac_match_data emac_sa8775p_data = {
 	.pm_data = &emac_sa8775p_pm_data,
 };
 
+static const char * const emac_sa8255p_pd_names[] = {
+	"core", "mdio", "serdes"
+};
+
+static const struct ethqos_emac_pm_data emac_sa8255p_pm_data = {
+	.pd = {
+		.pd_flags = PD_FLAG_NO_DEV_LINK,
+		.pd_names = emac_sa8255p_pd_names,
+		.num_pd_names = ETHQOS_NUM_PDS,
+	},
+	.use_domains = true,
+	.clk_ptp_rate = 230400000,
+};
+
+static const struct ethqos_emac_match_data emac_sa8255p_data = {
+	.drv_data = &emac_v4_0_0_data,
+	.pm_data = &emac_sa8255p_pm_data,
+};
+
 static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 {
 	struct device *dev = &ethqos->pdev->dev;
@@ -406,6 +445,28 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 	return 0;
 }
 
+static int qcom_ethqos_domain_on(struct qcom_ethqos *ethqos,
+				 enum ethqos_pd_selector sel)
+{
+	struct device *dev = ethqos->pd.pd_list->pd_devs[sel];
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret < 0)
+		dev_err(&ethqos->pdev->dev,
+			"Failed to enable the power domain for %s\n",
+			dev_name(dev));
+	return ret;
+}
+
+static void qcom_ethqos_domain_off(struct qcom_ethqos *ethqos,
+				   enum ethqos_pd_selector sel)
+{
+	struct device *dev = ethqos->pd.pd_list->pd_devs[sel];
+
+	pm_runtime_put_sync(dev);
+}
+
 static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
 {
 	struct device *dev = &ethqos->pdev->dev;
@@ -655,6 +716,20 @@ static void ethqos_configure_sgmii(struct qcom_ethqos *ethqos,
 	ethqos_pcs_set_inband(priv, interface == PHY_INTERFACE_MODE_SGMII);
 }
 
+static void ethqos_configure_sgmii_pd(struct qcom_ethqos *ethqos,
+				      phy_interface_t interface, int speed)
+{
+	switch (speed) {
+	case SPEED_2500:
+	case SPEED_1000:
+	case SPEED_100:
+	case SPEED_10:
+		ethqos->pd.serdes_level = speed;
+	}
+
+	ethqos_configure_sgmii(ethqos, interface, speed);
+}
+
 static void ethqos_configure(struct qcom_ethqos *ethqos,
 			     phy_interface_t interface, int speed)
 {
@@ -710,6 +785,45 @@ static int ethqos_mac_finish_serdes(struct net_device *ndev, void *priv,
 	return ret;
 }
 
+static int ethqos_mac_finish_serdes_pd(struct net_device *ndev, void *priv,
+				       unsigned int mode,
+				       phy_interface_t interface)
+{
+	struct qcom_ethqos *ethqos = priv;
+	struct device *dev = ethqos->pd.pd_list->pd_devs[ETHQOS_PD_SERDES];
+	int ret = 0;
+
+	qcom_ethqos_set_sgmii_loopback(ethqos, false);
+
+	if (interface == PHY_INTERFACE_MODE_SGMII ||
+	    interface == PHY_INTERFACE_MODE_2500BASEX)
+		ret = dev_pm_opp_set_level(dev, ethqos->pd.serdes_level);
+
+	return ret;
+}
+
+static int qcom_ethqos_pd_serdes_powerup(struct net_device *ndev, void *priv)
+{
+	struct qcom_ethqos *ethqos = priv;
+	struct device *dev = ethqos->pd.pd_list->pd_devs[ETHQOS_PD_SERDES];
+	int ret;
+
+	ret = qcom_ethqos_domain_on(ethqos, ETHQOS_PD_SERDES);
+	if (ret < 0)
+		return ret;
+
+	return dev_pm_opp_set_level(dev, ethqos->pd.serdes_level);
+}
+
+static void qcom_ethqos_pd_serdes_powerdown(struct net_device *ndev, void *priv)
+{
+	struct qcom_ethqos *ethqos = priv;
+	struct device *dev = ethqos->pd.pd_list->pd_devs[ETHQOS_PD_SERDES];
+
+	dev_pm_opp_set_level(dev, 0);
+	qcom_ethqos_domain_off(ethqos, ETHQOS_PD_SERDES);
+}
+
 static int ethqos_clks_config(void *priv, bool enabled)
 {
 	struct qcom_ethqos *ethqos = priv;
@@ -741,6 +855,68 @@ static void ethqos_clks_disable(void *data)
 	ethqos_clks_config(data, false);
 }
 
+static void ethqos_disable_serdes(void *data)
+{
+	struct qcom_ethqos *ethqos = data;
+
+	qcom_ethqos_domain_off(ethqos, ETHQOS_PD_SERDES);
+}
+
+static int ethqos_pd_clks_config(void *priv, bool enabled)
+{
+	struct qcom_ethqos *ethqos = priv;
+	int ret = 0;
+
+	if (enabled) {
+		ret = qcom_ethqos_domain_on(ethqos, ETHQOS_PD_MDIO);
+		if (ret < 0) {
+			dev_err(&ethqos->pdev->dev,
+				"Failed to enable the MDIO power domain\n");
+			return ret;
+		}
+
+		ethqos_set_func_clk_en(ethqos);
+	} else {
+		qcom_ethqos_domain_off(ethqos, ETHQOS_PD_MDIO);
+	}
+
+	return ret;
+}
+
+static int qcom_ethqos_pd_init(struct device *dev, void *priv)
+{
+	struct qcom_ethqos *ethqos = priv;
+	int ret;
+
+	/*
+	 * Enable functional clock to prevent DMA reset after timeout due
+	 * to no PHY clock being enabled after the hardware block has been
+	 * power cycled. The actual configuration will be adjusted once
+	 * ethqos_fix_mac_speed() is called.
+	 */
+	ethqos_set_func_clk_en(ethqos);
+
+	ret = qcom_ethqos_domain_on(ethqos, ETHQOS_PD_CORE);
+	if (ret)
+		return ret;
+
+	ret = qcom_ethqos_domain_on(ethqos, ETHQOS_PD_MDIO);
+	if (ret) {
+		qcom_ethqos_domain_off(ethqos, ETHQOS_PD_CORE);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void qcom_ethqos_pd_exit(struct device *dev, void *data)
+{
+	struct qcom_ethqos *ethqos = data;
+
+	qcom_ethqos_domain_off(ethqos, ETHQOS_PD_MDIO);
+	qcom_ethqos_domain_off(ethqos, ETHQOS_PD_CORE);
+}
+
 static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv)
 {
 	struct plat_stmmacenet_data *plat_dat = priv->plat;
@@ -781,31 +957,11 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 				     "dt configuration failed\n");
 	}
 
-	plat_dat->clks_config = ethqos_clks_config;
-
 	ethqos = devm_kzalloc(dev, sizeof(*ethqos), GFP_KERNEL);
 	if (!ethqos)
 		return -ENOMEM;
 
 	ethqos->phy_mode = plat_dat->phy_interface;
-	switch (ethqos->phy_mode) {
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
-		ethqos->configure_func = ethqos_configure_rgmii;
-		break;
-	case PHY_INTERFACE_MODE_2500BASEX:
-	case PHY_INTERFACE_MODE_SGMII:
-		ethqos->configure_func = ethqos_configure_sgmii;
-		plat_dat->mac_finish = ethqos_mac_finish_serdes;
-		break;
-	default:
-		dev_err(dev, "Unsupported phy mode %s\n",
-			phy_modes(ethqos->phy_mode));
-		return -EINVAL;
-	}
-
 	ethqos->pdev = pdev;
 	ethqos->rgmii_base = devm_platform_ioremap_resource_byname(pdev, "rgmii");
 	if (IS_ERR(ethqos->rgmii_base))
@@ -823,35 +979,101 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	ethqos->has_emac_ge_3 = drv_data->has_emac_ge_3;
 	ethqos->needs_sgmii_loopback = drv_data->needs_sgmii_loopback;
 
-	ethqos->pm.link_clk = devm_clk_get(dev, clk_name);
-	if (IS_ERR(ethqos->pm.link_clk))
-		return dev_err_probe(dev, PTR_ERR(ethqos->pm.link_clk),
-				     "Failed to get link_clk\n");
+	if (pm_data && pm_data->use_domains) {
+		switch (ethqos->phy_mode) {
+		case PHY_INTERFACE_MODE_RGMII:
+		case PHY_INTERFACE_MODE_RGMII_ID:
+		case PHY_INTERFACE_MODE_RGMII_RXID:
+		case PHY_INTERFACE_MODE_RGMII_TXID:
+			ethqos->configure_func = ethqos_configure_rgmii;
+			break;
+		case PHY_INTERFACE_MODE_2500BASEX:
+		case PHY_INTERFACE_MODE_SGMII:
+			ethqos->configure_func = ethqos_configure_sgmii_pd;
+			plat_dat->mac_finish = ethqos_mac_finish_serdes_pd;
+			break;
+		default:
+			dev_err(dev, "Unsupported phy mode %s\n",
+				phy_modes(ethqos->phy_mode));
+			return -EINVAL;
+		}
 
-	ret = ethqos_clks_config(ethqos, true);
-	if (ret)
-		return ret;
+		ret = devm_pm_domain_attach_list(dev, &pm_data->pd,
+						 &ethqos->pd.pd_list);
+		if (ret < 0)
+			return dev_err_probe(dev, ret, "Failed to attach power domains\n");
+
+		plat_dat->clks_config = ethqos_pd_clks_config;
+		plat_dat->serdes_powerup = qcom_ethqos_pd_serdes_powerup;
+		plat_dat->serdes_powerdown = qcom_ethqos_pd_serdes_powerdown;
+		plat_dat->exit = qcom_ethqos_pd_exit;
+		plat_dat->init = qcom_ethqos_pd_init;
+		plat_dat->clk_ptp_rate = pm_data->clk_ptp_rate;
+
+		ret = qcom_ethqos_domain_on(ethqos, ETHQOS_PD_SERDES);
+		if (ret)
+			return dev_err_probe(dev, ret,
+					     "Failed to enable the serdes power domain\n");
+
+		ret = devm_add_action_or_reset(dev, ethqos_disable_serdes, ethqos);
+		if (ret)
+			return ret;
+	} else {
+		switch (ethqos->phy_mode) {
+		case PHY_INTERFACE_MODE_RGMII:
+		case PHY_INTERFACE_MODE_RGMII_ID:
+		case PHY_INTERFACE_MODE_RGMII_RXID:
+		case PHY_INTERFACE_MODE_RGMII_TXID:
+			ethqos->configure_func = ethqos_configure_rgmii;
+			break;
+		case PHY_INTERFACE_MODE_2500BASEX:
+		case PHY_INTERFACE_MODE_SGMII:
+			ethqos->configure_func = ethqos_configure_sgmii;
+			plat_dat->mac_finish = ethqos_mac_finish_serdes;
+			break;
+		default:
+			dev_err(dev, "Unsupported phy mode %s\n",
+				phy_modes(ethqos->phy_mode));
+			return -EINVAL;
+		}
 
-	ret = devm_add_action_or_reset(dev, ethqos_clks_disable, ethqos);
-	if (ret)
-		return ret;
+		ethqos->pm.link_clk = devm_clk_get(dev, clk_name);
+		if (IS_ERR(ethqos->pm.link_clk))
+			return dev_err_probe(dev, PTR_ERR(ethqos->pm.link_clk),
+					     "Failed to get link_clk\n");
+
+		ret = ethqos_clks_config(ethqos, true);
+		if (ret)
+			return ret;
+
+		ret = devm_add_action_or_reset(dev, ethqos_clks_disable, ethqos);
+		if (ret)
+			return ret;
+
+		ethqos->pm.serdes_phy = devm_phy_optional_get(dev, "serdes");
+		if (IS_ERR(ethqos->pm.serdes_phy))
+			return dev_err_probe(dev, PTR_ERR(ethqos->pm.serdes_phy),
+					     "Failed to get serdes phy\n");
 
-	ethqos->pm.serdes_phy = devm_phy_optional_get(dev, "serdes");
-	if (IS_ERR(ethqos->pm.serdes_phy))
-		return dev_err_probe(dev, PTR_ERR(ethqos->pm.serdes_phy),
-				     "Failed to get serdes phy\n");
+		ethqos_set_clk_tx_rate(ethqos, NULL, plat_dat->phy_interface,
+				       SPEED_1000);
 
-	ethqos_set_clk_tx_rate(ethqos, NULL, plat_dat->phy_interface,
-			       SPEED_1000);
+		plat_dat->clks_config = ethqos_clks_config;
+		plat_dat->set_clk_tx_rate = ethqos_set_clk_tx_rate;
+		plat_dat->ptp_clk_freq_config = ethqos_ptp_clk_freq_config;
+
+		if (ethqos->pm.serdes_phy) {
+			plat_dat->serdes_powerup = qcom_ethqos_serdes_powerup;
+			plat_dat->serdes_powerdown  = qcom_ethqos_serdes_powerdown;
+		}
+	}
 
 	qcom_ethqos_set_sgmii_loopback(ethqos, true);
 	ethqos_set_func_clk_en(ethqos);
 
 	plat_dat->bsp_priv = ethqos;
-	plat_dat->set_clk_tx_rate = ethqos_set_clk_tx_rate;
 	plat_dat->fix_mac_speed = ethqos_fix_mac_speed;
 	plat_dat->dump_debug_regs = rgmii_dump;
-	plat_dat->ptp_clk_freq_config = ethqos_ptp_clk_freq_config;
 	plat_dat->core_type = DWMAC_CORE_GMAC4;
 	if (ethqos->has_emac_ge_3)
 		plat_dat->dwmac4_addrs = &drv_data->dwmac4_addrs;
@@ -877,6 +1099,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 
 static const struct of_device_id qcom_ethqos_match[] = {
 	{ .compatible = "qcom,qcs404-ethqos", .data = &emac_qcs404_data},
+	{ .compatible = "qcom,sa8255p-ethqos", .data = &emac_sa8255p_data},
 	{ .compatible = "qcom,sa8775p-ethqos", .data = &emac_sa8775p_data},
 	{ .compatible = "qcom,sc8280xp-ethqos", .data = &emac_sc8280xp_data},
 	{ .compatible = "qcom,sm8150-ethqos", .data = &emac_sm8150_data},

-- 
2.47.3

Re: [PATCH net-next v9 1/6] dt-bindings: net: qcom: document the ethqos device for SCMI-based systems

[Krzysztof Kozlowski]

On 16/03/2026 13:05, Bartosz Golaszewski wrote:
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    ethernet: ethernet@7a80000 {

Wrong unit address.

> +        compatible = "qcom,sa8255p-ethqos";
> +        reg = <0x23040000 0x10000>,
> +              <0x23056000 0x100>;


Best regards,
Krzysztof

Re: [PATCH net-next v9 0/6] net: stmmac: qcom-ethqos: add support for SCMI power domains

[Radu Rendec]

On Mon, 2026-03-16 at 13:05 +0100, Bartosz Golaszewski wrote:
> Add support for the firmware-managed variant of the DesignWare MAC on
> the sa8255p platform. This series contains new DT bindings and driver
> changes required to support the MAC in the STMMAC driver.
> 
> It also reorganizes the ethqos code quite a bit to make the introduction
> of power domains into the driver a bit easier on the eye.
> 
> The DTS changes will go in separately.

I'm seeing some weird behavior with this version. The probe part looks
good (but see below), but when I try to bring an interface up, it fails
with ETIMEDOUT. The relevant part of the stack trace leading to the
error is this:

dwmac4_dma_reset+0x208/0x220 [stmmac]
stmmac_reset+0x2c/0x68 [stmmac]
stmmac_init_dma_engine+0x108/0x400 [stmmac]
stmmac_hw_setup+0x5c/0x538 [stmmac]
__stmmac_open+0xc8/0x2a0 [stmmac]
stmmac_open+0xcc/0x238 [stmmac]
__dev_open+0x138/0x2a8

Now dwmac4_dma_reset() is very simple. It sets the soft reset bit in
the DMA_BUS_MODE register, then waits for the hardware to clear it, and
that never happens.

Now, getting back to the probe part, there is one extra message
(compared to my previous successful test on v7), which I see at the
very end of the probing:

  qcom-ethqos 23040000.ethernet: clk_csr value out of range (0xffffff00
  exceeds mask 0x00000f00), truncating

This is a sa8775p ride board, so there are two stmmac devices. I only
see that message for the 2nd one, which is also the one I'm trying to
enable, and which fails.

I realize this may or may not be related to your changes. But there is
no way to test on a SCMI-pd board without them. I'm not sure how
relevant it would be to test on the non-SCMI variant. I'm assuming the
DMA part should work the same way (regardless of SCMI-pd), so if I can
reproduce it there, and since I know it works on mainline Linux (that's
where I tested v7), I could bisect and see which commit in net-next
breaks it. If you don't have any better idea, let me know and I can
try. Meanwhile, I'll keep poking at v9.

Radu

> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
> ---
> Changes in v9:
> - Rebase on top of current linux-next again
> - Link to v8: https://patch.msgid.link/20260311-qcom-sa8255p-emac-v8-0-58227bcf1018@oss.qualcomm.com
> 
> Changes in v8:
> - Rebase on top of recent changes in linux-next which required an
>   extensive rework
> - Drop partial R-b tags
> - Link to v7: https://patch.msgid.link/20260306-qcom-sa8255p-emac-v7-0-d6a3013094b7@oss.qualcomm.com
> 
> Changes in v7:
> - Restored the correct authorship after learning git uses .mailmap for
>   the --author switch
> - Rebased on top of changes from Russell
> - Fixed resource management issues in error paths
> - Link to v6: https://lore.kernel.org/r/20260112-qcom-sa8255p-emac-v6-0-86a3d4b2ad83@oss.qualcomm.com
> 
> Changes in v6:
> - Fix $id value in the bindings
> - Drop patch 3/8 from the series
> - Update init/exit callback signatures
> - Link to v5: https://lore.kernel.org/r/20251107-qcom-sa8255p-emac-v5-0-01d3e3aaf388@linaro.org
> - Link to v6: https://lore.kernel.org/r/20251219-qcom-sa8255p-emac-v6-0-487f1082461e@oss.qualcomm.com
> 
> Changes in v5:
> - Name the DT binding document after the new compatbile
> - Add missing space
> - Make the power-domains limits stricter
> - Link to v4: https://lore.kernel.org/r/20251104-qcom-sa8255p-emac-v4-0-f76660087cea@linaro.org
> 
> Changes in v4:
> - Remove the phys property from the SCMI bindings
> - Mark the power-domain-names property as required
> - Set maxItems for power-domains to 1 for all existing bindings to
>   maintain the current requirements after modifying the value in the
>   top-level document
> - Link to v3: https://lore.kernel.org/r/20251027-qcom-sa8255p-emac-v3-0-75767b9230ab@linaro.org
> 
> Changes in v3:
> - Drop 'power' and 'perf' prefixes from power domain names
> - Rebase on top of Russell's changes to dwmac
> - Rebase on top of even more changes from Russell that are not yet
>   in next (E1vB6ld-0000000BIPy-2Qi4@rmk-PC.armlinux.org.uk)
> - Link to v2: https://lore.kernel.org/all/20251008-qcom-sa8255p-emac-v2-0-92bc29309fce@linaro.org/
> 
> Changes in v2:
> - Fix the power-domains property in DT bindings
> - Rework the DT bindings example
> - Drop the DTS patch, it will go upstream separately
> - Link to v1: https://lore.kernel.org/r/20250910-qcom-sa8255p-emac-v1-0-32a79cf1e668@linaro.org
> 
> ---
> Bartosz Golaszewski (6):
>       dt-bindings: net: qcom: document the ethqos device for SCMI-based systems
>       net: stmmac: qcom-ethqos: use generic device properties
>       net: stmmac: qcom-ethqos: wrap emac driver data in additional structure
>       net: stmmac: qcom-ethqos: split power management fields into a separate structure
>       net: stmmac: qcom-ethqos: split power management context into a separate struct
>       net: stmmac: qcom-ethqos: add support for sa8255p
> 
>  .../bindings/net/allwinner,sun7i-a20-gmac.yaml     |   3 +
>  .../bindings/net/altr,socfpga-stmmac.yaml          |   3 +
>  .../bindings/net/amlogic,meson-dwmac.yaml          |   3 +
>  .../devicetree/bindings/net/eswin,eic7700-eth.yaml |   3 +
>  .../devicetree/bindings/net/intel,dwmac-plat.yaml  |   3 +
>  .../bindings/net/loongson,ls1b-gmac.yaml           |   3 +
>  .../bindings/net/loongson,ls1c-emac.yaml           |   3 +
>  .../devicetree/bindings/net/nxp,dwmac-imx.yaml     |   3 +
>  .../devicetree/bindings/net/nxp,lpc1850-dwmac.yaml |   3 +
>  .../devicetree/bindings/net/nxp,s32-dwmac.yaml     |   3 +
>  .../devicetree/bindings/net/qcom,ethqos.yaml       |   3 +
>  .../bindings/net/qcom,sa8255p-ethqos.yaml          |  98 +++++
>  .../devicetree/bindings/net/renesas,rzn1-gmac.yaml |   3 +
>  .../bindings/net/renesas,rzv2h-gbeth.yaml          |   3 +
>  .../devicetree/bindings/net/rockchip-dwmac.yaml    |   3 +
>  .../devicetree/bindings/net/snps,dwmac.yaml        |   5 +-
>  .../bindings/net/sophgo,cv1800b-dwmac.yaml         |   3 +
>  .../bindings/net/sophgo,sg2044-dwmac.yaml          |   3 +
>  .../bindings/net/starfive,jh7110-dwmac.yaml        |   3 +
>  .../devicetree/bindings/net/stm32-dwmac.yaml       |   3 +
>  .../devicetree/bindings/net/tesla,fsd-ethqos.yaml  |   3 +
>  .../devicetree/bindings/net/thead,th1520-gmac.yaml |   3 +
>  .../bindings/net/toshiba,visconti-dwmac.yaml       |   3 +
>  MAINTAINERS                                        |   1 +
>  drivers/net/ethernet/stmicro/stmmac/Kconfig        |   2 +-
>  .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    | 401 +++++++++++++++++----
>  26 files changed, 498 insertions(+), 72 deletions(-)
> ---
> base-commit: dac1315bf558e4895665aa1c278fd30113ca119d
> change-id: 20250704-qcom-sa8255p-emac-8460235ac512
> 
> Best regards,

Re: [PATCH net-next v9 0/6] net: stmmac: qcom-ethqos: add support for SCMI power domains

[Bartosz Golaszewski]

On Mon, Mar 16, 2026 at 7:31 PM Radu Rendec <rrendec@redhat.com> wrote:
>
> On Mon, 2026-03-16 at 13:05 +0100, Bartosz Golaszewski wrote:
> > Add support for the firmware-managed variant of the DesignWare MAC on
> > the sa8255p platform. This series contains new DT bindings and driver
> > changes required to support the MAC in the STMMAC driver.
> >
> > It also reorganizes the ethqos code quite a bit to make the introduction
> > of power domains into the driver a bit easier on the eye.
> >
> > The DTS changes will go in separately.
>
> I'm seeing some weird behavior with this version. The probe part looks
> good (but see below), but when I try to bring an interface up, it fails
> with ETIMEDOUT. The relevant part of the stack trace leading to the
> error is this:
>
> dwmac4_dma_reset+0x208/0x220 [stmmac]
> stmmac_reset+0x2c/0x68 [stmmac]
> stmmac_init_dma_engine+0x108/0x400 [stmmac]
> stmmac_hw_setup+0x5c/0x538 [stmmac]
> __stmmac_open+0xc8/0x2a0 [stmmac]
> stmmac_open+0xcc/0x238 [stmmac]
> __dev_open+0x138/0x2a8
>
> Now dwmac4_dma_reset() is very simple. It sets the soft reset bit in
> the DMA_BUS_MODE register, then waits for the hardware to clear it, and
> that never happens.
>
> Now, getting back to the probe part, there is one extra message
> (compared to my previous successful test on v7), which I see at the
> very end of the probing:
>
>   qcom-ethqos 23040000.ethernet: clk_csr value out of range (0xffffff00
>   exceeds mask 0x00000f00), truncating
>
> This is a sa8775p ride board, so there are two stmmac devices. I only
> see that message for the 2nd one, which is also the one I'm trying to
> enable, and which fails.
>
> I realize this may or may not be related to your changes. But there is
> no way to test on a SCMI-pd board without them. I'm not sure how
> relevant it would be to test on the non-SCMI variant. I'm assuming the
> DMA part should work the same way (regardless of SCMI-pd), so if I can
> reproduce it there, and since I know it works on mainline Linux (that's
> where I tested v7), I could bisect and see which commit in net-next
> breaks it. If you don't have any better idea, let me know and I can
> try. Meanwhile, I'll keep poking at v9.
>

Does current net-next on its own still work? Or is the second
interface broken even without this series?

Bart

Re: [PATCH net-next v9 0/6] net: stmmac: qcom-ethqos: add support for SCMI power domains

[Radu Rendec]

On Tue, 2026-03-17 at 15:12 +0100, Bartosz Golaszewski wrote:
> On Mon, Mar 16, 2026 at 7:31 PM Radu Rendec <rrendec@redhat.com> wrote:
> > 
> > On Mon, 2026-03-16 at 13:05 +0100, Bartosz Golaszewski wrote:
> > > Add support for the firmware-managed variant of the DesignWare MAC on
> > > the sa8255p platform. This series contains new DT bindings and driver
> > > changes required to support the MAC in the STMMAC driver.
> > > 
> > > It also reorganizes the ethqos code quite a bit to make the introduction
> > > of power domains into the driver a bit easier on the eye.
> > > 
> > > The DTS changes will go in separately.
> > 
> > I'm seeing some weird behavior with this version. The probe part looks
> > good (but see below), but when I try to bring an interface up, it fails
> > with ETIMEDOUT. The relevant part of the stack trace leading to the
> > error is this:
> > 
> > dwmac4_dma_reset+0x208/0x220 [stmmac]
> > stmmac_reset+0x2c/0x68 [stmmac]
> > stmmac_init_dma_engine+0x108/0x400 [stmmac]
> > stmmac_hw_setup+0x5c/0x538 [stmmac]
> > __stmmac_open+0xc8/0x2a0 [stmmac]
> > stmmac_open+0xcc/0x238 [stmmac]
> > __dev_open+0x138/0x2a8
> > 
> > Now dwmac4_dma_reset() is very simple. It sets the soft reset bit in
> > the DMA_BUS_MODE register, then waits for the hardware to clear it, and
> > that never happens.
> > 
> > Now, getting back to the probe part, there is one extra message
> > (compared to my previous successful test on v7), which I see at the
> > very end of the probing:
> > 
> >   qcom-ethqos 23040000.ethernet: clk_csr value out of range (0xffffff00
> >   exceeds mask 0x00000f00), truncating
> > 
> > This is a sa8775p ride board, so there are two stmmac devices. I only
> > see that message for the 2nd one, which is also the one I'm trying to
> > enable, and which fails.
> > 
> > I realize this may or may not be related to your changes. But there is
> > no way to test on a SCMI-pd board without them. I'm not sure how
> > relevant it would be to test on the non-SCMI variant. I'm assuming the
> > DMA part should work the same way (regardless of SCMI-pd), so if I can
> > reproduce it there, and since I know it works on mainline Linux (that's
> > where I tested v7), I could bisect and see which commit in net-next
> > breaks it. If you don't have any better idea, let me know and I can
> > try. Meanwhile, I'll keep poking at v9.
> > 
> 
> Does current net-next on its own still work? Or is the second
> interface broken even without this series?

I don't think there is a way to test net-next on its own (without your
series) on a board with SCMI-pd firmware. It would require the
qcom-ethqos driver to have direct access to the clocks, but the clocks
would not be there.

What I could test though is a board with the "other" firmware (without
SCMI-pd). And on that board, I do *not* see the problem even with your
series applied. In fact, I tested the exact same kernel build I had
previously tested on the SCMI-pd board.

I'm not sure what to make of that or what else I could try.

FWIW, the "clk_csr value out of range" message I mentioned before is
still there on the board where everything works, so it's probably a
red herring.

-- 
Radu

Re: [PATCH net-next v9 2/6] net: stmmac: qcom-ethqos: use generic device properties

[Russell King (Oracle)]

On Mon, Mar 16, 2026 at 01:05:07PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> In order to drop the dependency on CONFIG_OF, convert all device property
> getters from OF-specific to generic device properties and stop pulling
> in any linux/of.h symbols.

Why is this desirable? Please see the recent discussion at

https://lore.kernel.org/r/20260322-remove-device-find-by-of-node-v1-0-b72eb22a1215@gmail.com

specifically replies from Andrew and myself.

Merely wanting to drop a dependency is not a good enough reason for
these kinds of conversions, because they in effect make the DT
properties also apply to ACPI which may not be appropriate (note
for example that MDIO busses are not represented in ACPI.)

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Re: [PATCH net-next v9 5/6] net: stmmac: qcom-ethqos: split power management context into a separate struct

[Russell King (Oracle)]

On Mon, Mar 16, 2026 at 01:05:10PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> With match data split into general and power-management sections, let's
> now do the same with runtime device data.

As I've already said, this conflicts with work that I have in progress,
which will remove the serdes support from this driver _if_ we can get
forward progress on the PCS bits from Mohd - that has become dependent
on sorting out the MDIO bus clock which seems to have been totally
broken in this driver for quite some time so that we can have confidence
that any testing that is done is actually being done on a setup which is
running within correct specification (and not running the MDIO bus at
some insane speed that may lead to data corruption.)

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Re: [PATCH net-next v9 6/6] net: stmmac: qcom-ethqos: add support for sa8255p

[Russell King (Oracle)]

On Mon, Mar 16, 2026 at 01:05:11PM +0100, Bartosz Golaszewski wrote:
> Extend the driver to support a new model - sa8255p. Unlike the
> previously supported variants, this one's power management is done in
> the firmware using SCMI. This is modeled in linux using power domains so
> add support for them.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Shouldn't the SerDes driver be doing the power management rather than
the ethernet driver?

We already have the crappy situation with this driver that the stmmac
clocks are not running when they need to be, which is now causing
warnings with the VLAN code. The platform glue driver itself doesn't
_actually_ have enough information on its own to know when it needs
to ensure that the PCS and SerDes need to be operational which is what
is leading to this problem.

Also note that the core stmmac driver does runtime PM management which
covers both the stmmac MDIO block and the core MAC as well. How does
your implementation interact with those, when e.g. a MDIO bus on one
stmmac instance could be used to access a PHY on a different instance.

> +struct ethqos_emac_pd_ctx {
> +	struct dev_pm_domain_list *pd_list;
> +	int serdes_level;

I don't think serdes_level is appropriate nor correct (see below.)

> +static void ethqos_configure_sgmii_pd(struct qcom_ethqos *ethqos,
> +				      phy_interface_t interface, int speed)
> +{
> +	switch (speed) {
> +	case SPEED_2500:
> +	case SPEED_1000:
> +	case SPEED_100:
> +	case SPEED_10:
> +		ethqos->pd.serdes_level = speed;

This is called at mac_link_up(), after mac_finish() has done its
stuff...

> +	}
> +
> +	ethqos_configure_sgmii(ethqos, interface, speed);
> +}
> +
>  static void ethqos_configure(struct qcom_ethqos *ethqos,
>  			     phy_interface_t interface, int speed)
>  {
> @@ -710,6 +785,45 @@ static int ethqos_mac_finish_serdes(struct net_device *ndev, void *priv,
>  	return ret;
>  }
>  
> +static int ethqos_mac_finish_serdes_pd(struct net_device *ndev, void *priv,
> +				       unsigned int mode,
> +				       phy_interface_t interface)
> +{
> +	struct qcom_ethqos *ethqos = priv;
> +	struct device *dev = ethqos->pd.pd_list->pd_devs[ETHQOS_PD_SERDES];
> +	int ret = 0;
> +
> +	qcom_ethqos_set_sgmii_loopback(ethqos, false);
> +
> +	if (interface == PHY_INTERFACE_MODE_SGMII ||
> +	    interface == PHY_INTERFACE_MODE_2500BASEX)
> +		ret = dev_pm_opp_set_level(dev, ethqos->pd.serdes_level);

... which means this won't get called with anything but a stale speed
from the _previous_ link up event.

> +
> +	return ret;
> +}
> +
> +static int qcom_ethqos_pd_serdes_powerup(struct net_device *ndev, void *priv)
> +{
> +	struct qcom_ethqos *ethqos = priv;
> +	struct device *dev = ethqos->pd.pd_list->pd_devs[ETHQOS_PD_SERDES];
> +	int ret;
> +
> +	ret = qcom_ethqos_domain_on(ethqos, ETHQOS_PD_SERDES);
> +	if (ret < 0)
> +		return ret;
> +
> +	return dev_pm_opp_set_level(dev, ethqos->pd.serdes_level);

and same here.

The fundamental question arises - why does the power domain need to know
the _media_ speed (which is completely unrelated to the speed at which
the SerDes link operates at) ?

For example, with SGMII, the link operates at 1.25GBaud irrespective of
whether it is operating at an underlying Ethernet data rate of 10M, 100M
or 1G speeds.

To me, the whole "serdes_level" stuff looks completely wrong.

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Re: [PATCH net-next v9 2/6] net: stmmac: qcom-ethqos: use generic device properties

[Andrew Lunn]

On Mon, Mar 16, 2026 at 01:05:07PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> In order to drop the dependency on CONFIG_OF, convert all device property
> getters from OF-specific to generic device properties and stop pulling
> in any linux/of.h symbols.

Adding to what Russell said, please document your new binding. e.g. in
Documentation/firmware-guide/acpi/dsd.

	Andrew

Re: [PATCH net-next v9 2/6] net: stmmac: qcom-ethqos: use generic device properties

[Andrew Lunn]

On Mon, Mar 16, 2026 at 01:05:07PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> In order to drop the dependency on CONFIG_OF, convert all device property
> getters from OF-specific to generic device properties and stop pulling
> in any linux/of.h symbols.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/Kconfig             | 2 +-
>  drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 9 ++++-----
>  2 files changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> index 07088d03dbab5bd1abf66e9460613b839c1d565e..e2af4fdd654340d618477ed87d3889dbb9aab456 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
> +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> @@ -135,7 +135,7 @@ config DWMAC_MESON
>  config DWMAC_QCOM_ETHQOS
>  	tristate "Qualcomm ETHQOS support"
>  	default ARCH_QCOM
> -	depends on OF && (ARCH_QCOM || COMPILE_TEST)
> +	depends on ARCH_QCOM || COMPILE_TEST
>  	help
>  	  Support for the Qualcomm ETHQOS core.

Are you sure you want to do that?

static int qcom_ethqos_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	const struct ethqos_emac_driver_data *data;
	struct plat_stmmacenet_data *plat_dat;
	struct stmmac_resources stmmac_res;
	struct device *dev = &pdev->dev;
	struct qcom_ethqos *ethqos;
	int ret, i;

	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
	if (ret)
		return dev_err_probe(dev, ret,
				     "Failed to get platform resources\n");

	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
	if (IS_ERR(plat_dat)) {
		return dev_err_probe(dev, PTR_ERR(plat_dat),
				     "dt configuration failed\n");
	}

https://elixir.bootlin.com/linux/v6.19.9/source/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c#L684


#else
struct plat_stmmacenet_data *
devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
{
	return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_OF */

It seems like this is just going to result in the probe failing with
-EINVAL.

	Andrew