linux-kernel - [PATCH v2 1/3] dt-bindings: memory-controller: Document Broadcom STB MEMC

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Date:   Fri, 22 Jul 2022 13:10:41 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-kernel@...ts.infradead.org (moderated list:BROADCOM BCM7XXX
        ARM ARCHITECTURE),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS)
Subject: [PATCH v2 1/3] dt-bindings: memory-controller: Document Broadcom STB MEMC

Document the Broadcom STB memory controller which is a trivial binding
for now with a set of compatible strings and single register.

Since we introduce this binding, the section in
Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt is removed
and this binding is referenced instead.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 .../bindings/arm/bcm/brcm,brcmstb.txt         | 11 +---
 .../brcm,brcmstb-memc-ddr.yaml                | 53 +++++++++++++++++++
 2 files changed, 55 insertions(+), 9 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml

diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
index 104cc9b41df4..e797d2f69f3b 100644
--- a/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
+++ b/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
@@ -187,15 +187,8 @@ Required properties:
 Sequencer DRAM parameters and control registers. Used for Self-Refresh
 Power-Down (SRPD), among other things.
 
-Required properties:
-- compatible     : should contain one of these
-	"brcm,brcmstb-memc-ddr-rev-b.2.1"
-	"brcm,brcmstb-memc-ddr-rev-b.2.2"
-	"brcm,brcmstb-memc-ddr-rev-b.2.3"
-	"brcm,brcmstb-memc-ddr-rev-b.3.0"
-	"brcm,brcmstb-memc-ddr-rev-b.3.1"
-	"brcm,brcmstb-memc-ddr"
-- reg            : the MEMC DDR register range
+See Documentation/devicetree/bindings/memory-controllers/brcm,memc.yaml for a
+full list of supported compatible strings and properties.
 
 Example:
 
diff --git a/Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml b/Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml
new file mode 100644
index 000000000000..a1479b75c536
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/brcm,brcmstb-memc-ddr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Memory controller (MEMC) for Broadcom STB
+
+maintainers:
+  - Florian Fainelli <f.fainelli@...il.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - brcm,brcmstb-memc-ddr-rev-b.1.x
+          - brcm,brcmstb-memc-ddr-rev-b.2.0
+          - brcm,brcmstb-memc-ddr-rev-b.2.1
+          - brcm,brcmstb-memc-ddr-rev-b.2.2
+          - brcm,brcmstb-memc-ddr-rev-b.2.3
+          - brcm,brcmstb-memc-ddr-rev-b.2.5
+          - brcm,brcmstb-memc-ddr-rev-b.2.6
+          - brcm,brcmstb-memc-ddr-rev-b.2.7
+          - brcm,brcmstb-memc-ddr-rev-b.2.8
+          - brcm,brcmstb-memc-ddr-rev-b.3.0
+          - brcm,brcmstb-memc-ddr-rev-b.3.1
+          - brcm,brcmstb-memc-ddr-rev-c.1.0
+          - brcm,brcmstb-memc-ddr-rev-c.1.1
+          - brcm,brcmstb-memc-ddr-rev-c.1.2
+          - brcm,brcmstb-memc-ddr-rev-c.1.3
+          - brcm,brcmstb-memc-ddr-rev-c.1.4
+      - const: brcm,brcmstb-memc-ddr
+
+  reg:
+    maxItems: 1
+
+  clock-frequency:
+    description: DDR PHY frequency in Hz
+
+required:
+  - compatible
+  - reg
+  - clock-frequency
+
+additionalProperties: false
+
+examples:
+  - |
+    memory-controller@...2000 {
+        compatible = "brcm,brcmstb-memc-ddr-rev-c.1.1", "brcm,brcmstb-memc-ddr";
+        reg = <0x9902000 0x600>;
+        clock-frequency = <2133000000>;
+    };
-- 
2.25.1