MediaTek's USXGMII can be found in the MT7988 SoC. We need to access
it in order to configure and monitor the Ethernet SerDes link in
USXGMII, 10GBase-R and 5GBase-R mode. By including a wrapped
legacy 1000Base-X/2500Base-X/Cisco SGMII LynxI PCS as well, those
interface modes are also available.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
.../bindings/net/pcs/mediatek,usxgmii.yaml | 100 ++++++++++++++++++
1 file changed, 100 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml
diff --git a/Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml b/Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml
new file mode 100644
index 0000000000000..9a798c0d2fdd7
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml
@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/pcs/mediatek,usxgmii.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek USXGMII PCS
+
+maintainers:
+ - Daniel Golle <daniel@makrotopia.org>
+
+description:
+ The MediaTek USXGMII PCS provides physical link control and status
+ for USXGMII, 10GBase-R and 5GBase-R links on the SerDes interfaces
+ provided by the PEXTP PHY.
+ In order to also support legacy 2500Base-X, 1000Base-X and Cisco
+ SGMII an existing mediatek,*-sgmiisys LynxI PCS is wrapped to
+ provide those interfaces modes on the same SerDes interfaces shared
+ with the USXGMII PCS.
+
+properties:
+ $nodename:
+ pattern: "^pcs@[0-9a-f]+$"
+
+ compatible:
+ const: mediatek,mt7988-usxgmiisys
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: USXGMII top-level clock
+ - description: SGMII top-level clock
+ - description: SGMII subsystem TX clock
+ - description: SGMII subsystem RX clock
+ - description: XFI PLL clock
+
+ clock-names:
+ items:
+ - const: usxgmii
+ - const: sgmii_sel
+ - const: sgmii_tx
+ - const: sgmii_rx
+ - const: xfi_pll
+
+ phys:
+ items:
+ - description: PEXTP SerDes PHY
+
+ mediatek,sgmiisys:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to the syscon node of the corresponding SGMII LynxI PCS.
+
+ resets:
+ items:
+ - description: XFI reset
+ - description: SGMII reset
+
+ reset-names:
+ items:
+ - const: xfi
+ - const: sgmii
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - phys
+ - mediatek,sgmiisys
+ - resets
+ - reset-names
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/mediatek,mt7988-clk.h>
+ #include <dt-bindings/reset/mediatek,mt7988-resets.h>
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ usxgmiisys0: pcs@10080000 {
+ compatible = "mediatek,mt7988-usxgmiisys";
+ reg = <0 0x10080000 0 0x1000>;
+ clocks = <&topckgen CLK_TOP_USXGMII_SBUS_0_SEL>,
+ <&topckgen CLK_TOP_SGM_0_SEL>,
+ <&sgmiisys0 CLK_SGM0_TX_EN>,
+ <&sgmiisys0 CLK_SGM0_RX_EN>,
+ <&xfi_pll CLK_XFIPLL_PLL_EN>;
+ clock-names = "usxgmii", "sgmii_sel", "sgmii_tx", "sgmii_rx", "xfi_pll";
+ resets = <&watchdog MT7988_TOPRGU_XFI0_GRST>,
+ <&watchdog MT7988_TOPRGU_SGMII0_GRST>;
+ reset-names = "xfi", "sgmii";
+ phys = <&xfi_pextp0>;
+ mediatek,sgmiisys = <&sgmiisys0>;
+ };
+ };
--
2.43.0