[PATCH v2 07/24] dt-bindings: net: dwmac: Detach Generic DW MAC bindings

From: Serge Semin
Date: Mon Feb 08 2021 - 09:09:42 EST

Currently the snps,dwmac.yaml DT bindings file is used for both DT nodes
describing generic DW MAC devices and as DT schema with common properties
to be evaluated against a vendor-specific DW MAC IP-cores. Due to such
dual-purpose design the "compatible" property of the common DW MAC schema
needs to contain the vendor-specific strings to successfully pass the
schema evaluation in case if it's referenced from the vendor-specific DT
bindings. That's a bad design from maintainability point of view, since
adding/removing any DW MAC-based device bindings requires the common
schema modification. In order to fix that let's detach the schema which
provides the generic DW MAC DT nodes evaluation into a dedicated DT
bindings file preserving the common DW MAC properties declaration in the
snps,dwmac.yaml file. By doing so we'll still provide a common properties
evaluation for each vendor-specific MAC bindings which refer to the
common bindings file, while the generic DW MAC DT nodes will be checked
against the new snps,dwmac-generic.yaml DT schema.

Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>

---

Changelog v2:
- Add a note to the snps,dwmac-generic.yaml bindings file description of
a requirement to create a new DT bindings file for the vendor-specific
versions of the DW MAC.
---
.../bindings/net/snps,dwmac-generic.yaml | 154 ++++++++++++++++++
.../devicetree/bindings/net/snps,dwmac.yaml | 139 +---------------
2 files changed, 155 insertions(+), 138 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml

diff --git a/Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml b/Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml
new file mode 100644
index 000000000000..6c3bf5b2f890
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml
@@ -0,0 +1,154 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/snps,dwmac-generic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys DesignWare Generic MAC Device Tree Bindings
+
+maintainers:
+ - Alexandre Torgue <alexandre.torgue@xxxxxx>
+ - Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
+ - Jose Abreu <joabreu@xxxxxxxxxxxx>
+
+description:
+ The primary purpose of this bindings file is to validate the Generic
+ Synopsys Desginware MAC DT nodes defined in accordance with the select
+ schema. All new vendor-specific versions of the DW *MAC IP-cores must
+ be described in a dedicated DT bindings file.
+
+# Select the DT nodes, which have got compatible strings either as just a
+# single string with IP-core name optionally followed by the IP version or
+# two strings: one with IP-core name plus the IP version, another as just
+# the IP-core name.
+select:
+ properties:
+ compatible:
+ oneOf:
+ - items:
+ - pattern: "^snps,dw(xg)+mac(-[0-9]+\\.[0-9]+a?)?$"
+ - items:
+ - pattern: "^snps,dwmac-[0-9]+\\.[0-9]+a?$"
+ - const: snps,dwmac
+ - items:
+ - pattern: "^snps,dwxgmac-[0-9]+\\.[0-9]+a?$"
+ - const: snps,dwxgmac
+
+ required:
+ - compatible
+
+allOf:
+ - $ref: snps,dwmac.yaml#
+
+properties:
+ compatible:
+ oneOf:
+ - description: Generic Synopsys DW MAC
+ oneOf:
+ - items:
+ - enum:
+ - snps,dwmac-3.50a
+ - snps,dwmac-3.610
+ - snps,dwmac-3.70a
+ - snps,dwmac-3.710
+ - snps,dwmac-4.00
+ - snps,dwmac-4.10a
+ - snps,dwmac-4.20a
+ - const: snps,dwmac
+ - const: snps,dwmac
+ - description: Generic Synopsys DW xGMAC
+ oneOf:
+ - items:
+ - enum:
+ - snps,dwxgmac-2.10
+ - const: snps,dwxgmac
+ - const: snps,dwxgmac
+ - description: ST SPEAr SoC Family GMAC
+ deprecated: true
+ const: st,spear600-gmac
+
+ reg:
+ maxItems: 1
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ gmac0: ethernet@e0800000 {
+ compatible = "snps,dwxgmac-2.10", "snps,dwxgmac";
+ reg = <0xe0800000 0x8000>;
+ interrupt-parent = <&vic1>;
+ interrupts = <24 23 22>;
+ interrupt-names = "macirq", "eth_wake_irq", "eth_lpi";
+ mac-address = [000000000000]; /* Filled in by U-Boot */
+ max-frame-size = <3800>;
+ phy-mode = "gmii";
+ snps,multicast-filter-bins = <256>;
+ snps,perfect-filter-entries = <128>;
+ rx-fifo-depth = <16384>;
+ tx-fifo-depth = <16384>;
+ clocks = <&clock>;
+ clock-names = "stmmaceth";
+ snps,axi-config = <&stmmac_axi_setup>;
+ snps,mtl-rx-config = <&mtl_rx_setup>;
+ snps,mtl-tx-config = <&mtl_tx_setup>;
+ mdio0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "snps,dwmac-mdio";
+ phy1: ethernet-phy@0 {
+ reg = <0>;
+ };
+ };
+ };
+ - |
+ gmac1: ethernet@f8010000 {
+ compatible = "snps,dwmac-4.10a", "snps,dwmac";
+ reg = <0xf8010000 0x4000>;
+ interrupts = <0 98 4>;
+ interrupt-names = "macirq";
+ clock-names = "stmmaceth", "ptp_ref";
+ clocks = <&clock 4>, <&clock 5>;
+ phy-mode = "rgmii";
+ snps,txpbl = <8>;
+ snps,rxpbl = <2>;
+ snps,aal;
+ snps,tso;
+
+ axi-config {
+ snps,wr_osr_lmt = <0xf>;
+ snps,rd_osr_lmt = <0xf>;
+ snps,blen = <256 128 64 32 0 0 0>;
+ };
+
+ mtl-rx-config {
+ snps,rx-queues-to-use = <1>;
+ snps,rx-sched-sp;
+ queue0 {
+ snps,dcb-algorithm;
+ snps,map-to-dma-channel = <0x0>;
+ snps,priority = <0x0>;
+ };
+ };
+
+ mtl-tx-config {
+ snps,tx-queues-to-use = <2>;
+ snps,tx-sched-wrr;
+
+ queue0 {
+ snps,weight = <0x10>;
+ snps,dcb-algorithm;
+ snps,priority = <0x0>;
+ };
+
+ queue1 {
+ snps,avb-algorithm;
+ snps,send_slope = <0x1000>;
+ snps,idle_slope = <0x1000>;
+ snps,high_credit = <0x3E800>;
+ snps,low_credit = <0x1FC18000>;
+ snps,priority = <0x1>;
+ };
+ };
+ };
+...
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 56baf8e6bf17..bdc437b14878 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -11,31 +11,7 @@ maintainers:
- Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
- Jose Abreu <joabreu@xxxxxxxxxxxx>

-# Select every compatible, including the deprecated ones. This way, we
-# will be able to report a warning when we have that compatible, since
-# we will validate the node thanks to the select, but won't report it
-# as a valid value in the compatible property description
-select:
- properties:
- compatible:
- contains:
- enum:
- - snps,dwmac
- - snps,dwmac-3.50a
- - snps,dwmac-3.610
- - snps,dwmac-3.70a
- - snps,dwmac-3.710
- - snps,dwmac-4.00
- - snps,dwmac-4.10a
- - snps,dwmac-4.20a
- - snps,dwxgmac
- - snps,dwxgmac-2.10
-
- # Deprecated
- - st,spear600-gmac
-
- required:
- - compatible
+select: false

allOf:
- $ref: "ethernet-controller.yaml#"
@@ -62,35 +38,6 @@ allOf:
MAC HW capability register.

properties:
-
- # We need to include all the compatibles from schemas that will
- # include that schemas, otherwise compatible won't validate for
- # those.
- compatible:
- contains:
- enum:
- - allwinner,sun7i-a20-gmac
- - allwinner,sun8i-a83t-emac
- - allwinner,sun8i-h3-emac
- - allwinner,sun8i-r40-emac
- - allwinner,sun8i-v3s-emac
- - allwinner,sun50i-a64-emac
- - amlogic,meson6-dwmac
- - amlogic,meson8b-dwmac
- - amlogic,meson8m2-dwmac
- - amlogic,meson-gxbb-dwmac
- - amlogic,meson-axg-dwmac
- - snps,dwmac
- - snps,dwmac-3.50a
- - snps,dwmac-3.610
- - snps,dwmac-3.70a
- - snps,dwmac-3.710
- - snps,dwmac-4.00
- - snps,dwmac-4.10a
- - snps,dwmac-4.20a
- - snps,dwxgmac
- - snps,dwxgmac-2.10
-
reg:
minItems: 1
maxItems: 2
@@ -555,88 +502,4 @@ dependencies:
snps,reset-delay-us: ["snps,reset-gpio"]

additionalProperties: true
-
-examples:
- - |
- gmac0: ethernet@e0800000 {
- compatible = "snps,dwxgmac-2.10", "snps,dwxgmac";
- reg = <0xe0800000 0x8000>;
- interrupt-parent = <&vic1>;
- interrupts = <24 23 22>;
- interrupt-names = "macirq", "eth_wake_irq", "eth_lpi";
- mac-address = [000000000000]; /* Filled in by U-Boot */
- max-frame-size = <3800>;
- phy-mode = "gmii";
- snps,multicast-filter-bins = <256>;
- snps,perfect-filter-entries = <128>;
- rx-fifo-depth = <16384>;
- tx-fifo-depth = <16384>;
- clocks = <&clock>;
- clock-names = "stmmaceth";
- snps,axi-config = <&stmmac_axi_setup>;
- snps,mtl-rx-config = <&mtl_rx_setup>;
- snps,mtl-tx-config = <&mtl_tx_setup>;
- mdio0 {
- #address-cells = <1>;
- #size-cells = <0>;
- compatible = "snps,dwmac-mdio";
- phy1: ethernet-phy@0 {
- reg = <0>;
- };
- };
- };
- - |
- gmac1: ethernet@f8010000 {
- compatible = "snps,dwmac-4.10a", "snps,dwmac";
- reg = <0xf8010000 0x4000>;
- interrupts = <0 98 4>;
- interrupt-names = "macirq";
- clock-names = "stmmaceth", "ptp_ref";
- clocks = <&clock 4>, <&clock 5>;
- phy-mode = "rgmii";
- snps,txpbl = <8>;
- snps,rxpbl = <2>;
- snps,aal;
- snps,tso;
-
- axi-config {
- snps,wr_osr_lmt = <0xf>;
- snps,rd_osr_lmt = <0xf>;
- snps,blen = <256 128 64 32 0 0 0>;
- };
-
- mtl-rx-config {
- snps,rx-queues-to-use = <1>;
- snps,rx-sched-sp;
- queue0 {
- snps,dcb-algorithm;
- snps,map-to-dma-channel = <0x0>;
- snps,priority = <0x0>;
- };
- };
-
- mtl-tx-config {
- snps,tx-queues-to-use = <2>;
- snps,tx-sched-wrr;
- queue0 {
- snps,weight = <0x10>;
- snps,dcb-algorithm;
- snps,priority = <0x0>;
- };
-
- queue1 {
- snps,avb-algorithm;
- snps,send_slope = <0x1000>;
- snps,idle_slope = <0x1000>;
- snps,high_credit = <0x3E800>;
- snps,low_credit = <0xFFC18000>;
- snps,priority = <0x1>;
- };
- };
- };
-
-# FIXME: We should set it, but it would report all the generic
-# properties as additional properties.
-# additionalProperties: false
-
...
--
2.29.2