linux-kernel - [PATCH RFC v1 1/4] dt-bindings: power: meson-ee-pwrc: add support for Meson8/8b/8m2

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Message-Id: <20200414201457.229131-2-martin.blumenstingl@googlemail.com>
Date:   Tue, 14 Apr 2020 22:14:54 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     robh+dt@...nel.org, khilman@...libre.com, narmstrong@...libre.com,
        linux-amlogic@...ts.infradead.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH RFC v1 1/4] dt-bindings: power: meson-ee-pwrc: add support for Meson8/8b/8m2

The power domains on the 32-bit Meson8/Meson8b/Meson8m2 SoCs are very
similar to what G12A still uses. The (known) differences are:
- Meson8 doesn't use any reset lines at all
- Meson8b and Meson8m2 use the same reset lines, which are different
  from what the 64-bit SoCs use
- there is no "vapb" clock on the older SoCs
- amlogic,ao-sysctrl cannot point to the whole AO sysctrl region but
  only the power management related registers

Add a new compatible string and adjust clock and reset line expectations
for each SoC.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 .../bindings/power/amlogic,meson-ee-pwrc.yaml | 75 ++++++++++++++-----
 include/dt-bindings/power/meson8-power.h      | 13 ++++
 2 files changed, 71 insertions(+), 17 deletions(-)
 create mode 100644 include/dt-bindings/power/meson8-power.h

diff --git a/Documentation/devicetree/bindings/power/amlogic,meson-ee-pwrc.yaml b/Documentation/devicetree/bindings/power/amlogic,meson-ee-pwrc.yaml
index 6c6079fe1351..a0e4cf143b9c 100644
--- a/Documentation/devicetree/bindings/power/amlogic,meson-ee-pwrc.yaml
+++ b/Documentation/devicetree/bindings/power/amlogic,meson-ee-pwrc.yaml
@@ -23,13 +23,19 @@ description: |+
 properties:
   compatible:
     enum:
+      - amlogic,meson8-pwrc
+      - amlogic,meson8b-pwrc
+      - amlogic,meson8m2-pwrc
       - amlogic,meson-g12a-pwrc
       - amlogic,meson-sm1-pwrc
 
   clocks:
-    minItems: 2
+    minItems: 1
+    maxItems: 2
 
   clock-names:
+    minItems: 1
+    maxItems: 2
     items:
       - const: vpu
       - const: vapb
@@ -37,20 +43,6 @@ properties:
   resets:
     minItems: 11
 
-  reset-names:
-    items:
-      - const: viu
-      - const: venc
-      - const: vcbus
-      - const: bt656
-      - const: rdma
-      - const: venci
-      - const: vencp
-      - const: vdac
-      - const: vdi6
-      - const: vencl
-      - const: vid_lock
-
   "#power-domain-cells":
     const: 1
 
@@ -59,12 +51,61 @@ properties:
     allOf:
       - $ref: /schemas/types.yaml#/definitions/phandle
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          enum:
+            - amlogic,meson8b-pwrc
+            - amlogic,meson8m2-pwrc
+    then:
+      properties:
+        reset-names:
+          items:
+            - const: dblk
+            - const: pic_dc
+            - const: hdmi_apb
+            - const: hdmi_system
+            - const: venci
+            - const: vencp
+            - const: vdac
+            - const: vencl
+            - const: viu
+            - const: venc
+            - const: rdma
+      required:
+        - resets
+        - reset-names
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - amlogic,meson-g12a-pwrc
+            - amlogic,meson-sm1-pwrc
+    then:
+      properties:
+        reset-names:
+          items:
+            - const: viu
+            - const: venc
+            - const: vcbus
+            - const: bt656
+            - const: rdma
+            - const: venci
+            - const: vencp
+            - const: vdac
+            - const: vdi6
+            - const: vencl
+            - const: vid_lock
+      required:
+        - resets
+        - reset-names
+
 required:
   - compatible
   - clocks
   - clock-names
-  - resets
-  - reset-names
   - "#power-domain-cells"
   - amlogic,ao-sysctrl
 
diff --git a/include/dt-bindings/power/meson8-power.h b/include/dt-bindings/power/meson8-power.h
new file mode 100644
index 000000000000..dd8b2ddb82a7
--- /dev/null
+++ b/include/dt-bindings/power/meson8-power.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: (GPL-2.0+ or MIT) */
+/*
+ * Copyright (c) 2019 Martin Blumenstingl <martin.blumenstingl@...glemail.com>
+ */
+
+#ifndef _DT_BINDINGS_MESON8_POWER_H
+#define _DT_BINDINGS_MESON8_POWER_H
+
+#define PWRC_MESON8_VPU_ID			0
+#define PWRC_MESON8_ETHERNET_MEM_ID		1
+#define PWRC_MESON8_AUDIO_DSP_MEM_ID		2
+
+#endif /* _DT_BINDINGS_MESON8_POWER_H */
-- 
2.26.0