[PATCH v3 0/2] ARM: vt8500: Add VIA APC Rock/Paper board

[PATCH v3 0/2] ARM: vt8500: Add VIA APC Rock/Paper board

[Alexey Charkov]

Add binding and DTS for the WM8950 based VIA APC Rock board. Paper
is the same board for all intents and purposes, so reflect it only
in the binding description.

Split the series from v1 into several chunks by topic so as not to
spam all the subsystems with unrelated changes, per Rob's suggestion

Changes in v2:
- kept single-valued compatibles in a single enum (thanks Rob)
- dropped the empty overall description node
- Link to v1: https://lore.kernel.org/all/20250416-wmt-updates-v1-7-f9af689cdfc2@gmail.com/

Changes in v3:
- submit DTS changes together with the respective binding change
- Link to v2: https://lore.kernel.org/r/20250418-apc_paper_binding-v2-1-17c9023b7c9b@gmail.com

Signed-off-by: Alexey Charkov <alchark@gmail.com>
---
Alexey Charkov (2):
      dt-bindings: arm: vt8500: Add VIA APC Rock/Paper boards
      ARM: dts: vt8500: Add VIA APC Rock/Paper board

 Documentation/devicetree/bindings/arm/vt8500.yaml | 23 ++++++++++++++---------
 arch/arm/boot/dts/vt8500/Makefile                 |  3 ++-
 arch/arm/boot/dts/vt8500/wm8950-apc-rock.dts      | 21 +++++++++++++++++++++
 arch/arm/boot/dts/vt8500/wm8950.dtsi              | 11 +++++++++++
 4 files changed, 48 insertions(+), 10 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250418-apc_paper_binding-8feae286710e

Best regards,
-- 
Alexey Charkov <alchark@gmail.com>

[PATCH v3 1/2] dt-bindings: arm: vt8500: Add VIA APC Rock/Paper boards

[Alexey Charkov]

APC Rock is a development board based on WonderMedia WM8950 SoC
released around 2013. Paper is the same as Rock but lacking a
VGA port and shipped with a recycled cardboard case.

While at that, put myself as the maintainer, given that Tony is
unavailable as of lately.

Signed-off-by: Alexey Charkov <alchark@gmail.com>
---
 Documentation/devicetree/bindings/arm/vt8500.yaml | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/vt8500.yaml b/Documentation/devicetree/bindings/arm/vt8500.yaml
index 5d5ad5a60451f569e6ef30c924a1964d02e1aa82..f2164144a7af29ca77761bc58fe7f4558e7d101c 100644
--- a/Documentation/devicetree/bindings/arm/vt8500.yaml
+++ b/Documentation/devicetree/bindings/arm/vt8500.yaml
@@ -7,19 +7,24 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: VIA/Wondermedia VT8500 Platforms
 
 maintainers:
-  - Tony Prisk <linux@prisktech.co.nz>
-description: test
+  - Alexey Charkov <alchark@gmail.com>
 
 properties:
   $nodename:
     const: '/'
   compatible:
-    items:
-      - enum:
-          - via,vt8500
-          - wm,wm8505
-          - wm,wm8650
-          - wm,wm8750
-          - wm,wm8850
+    oneOf:
+      - items:
+          - enum:
+              - via,vt8500
+              - wm,wm8505
+              - wm,wm8650
+              - wm,wm8750
+              - wm,wm8850
+
+      - description: VIA APC Rock and Paper boards
+        items:
+          - const: via,apc-rock
+          - const: wm,wm8950
 
 additionalProperties: true

-- 
2.49.0

[PATCH v3 2/2] ARM: dts: vt8500: Add VIA APC Rock/Paper board

[Alexey Charkov]

APC Rock is a development board based on WonderMedia WM8590 released
around 2013. Paper is the same board, but with the VGA port left
unpopulated, and shipped with a recycled cardboard case

Its hardware includes:
* Single-core Cortex-A9 CPU at 800 MHz
* 512MB DDR3 RAM
* 4GB NAND flash
* 8MB SPI NOR flash
* ARM Mali-400 GPU
* HDMI output (type A) capable of 1080p
* VGA output (on Rock, but not on Paper)
* 2x USB 2.0 type A
* 1x USB 2.0 OTG (microUSB connector)
* microSD slot
* 10/100M Ethernet
* 3.5mm minijack connector with combined headphones/mic
* Half-height miniPCIe slot (with only USB 2.0 signals)

Signed-off-by: Alexey Charkov <alchark@gmail.com>
---
 arch/arm/boot/dts/vt8500/Makefile            |  3 ++-
 arch/arm/boot/dts/vt8500/wm8950-apc-rock.dts | 21 +++++++++++++++++++++
 arch/arm/boot/dts/vt8500/wm8950.dtsi         | 11 +++++++++++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/vt8500/Makefile b/arch/arm/boot/dts/vt8500/Makefile
index 255f4403af91c1d6a22416ab694b8eab44bf98a2..c5a2e57d53af4babe40fe2d79b2f8d9c1ae1b8db 100644
--- a/arch/arm/boot/dts/vt8500/Makefile
+++ b/arch/arm/boot/dts/vt8500/Makefile
@@ -4,4 +4,5 @@ dtb-$(CONFIG_ARCH_VT8500) += \
 	wm8505-ref.dtb \
 	wm8650-mid.dtb \
 	wm8750-apc8750.dtb \
-	wm8850-w70v2.dtb
+	wm8850-w70v2.dtb \
+	wm8950a-apc-rock.dtb
diff --git a/arch/arm/boot/dts/vt8500/wm8950-apc-rock.dts b/arch/arm/boot/dts/vt8500/wm8950-apc-rock.dts
new file mode 100644
index 0000000000000000000000000000000000000000..58b3c8deb4f20ae072bf1381f1dfa5e5adeb414a
--- /dev/null
+++ b/arch/arm/boot/dts/vt8500/wm8950-apc-rock.dts
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2025 Alexey Charkov <alchark@gmail.com>
+ */
+
+/dts-v1/;
+/include/ "wm8950.dtsi"
+
+/ {
+	model = "VIA APC Rock";
+	compatible = "via,apc-rock", "wm,wm8950";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x20000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/vt8500/wm8950.dtsi b/arch/arm/boot/dts/vt8500/wm8950.dtsi
new file mode 100644
index 0000000000000000000000000000000000000000..31fba05d3c3e70b21a64d08b5cdf645102a1faf3
--- /dev/null
+++ b/arch/arm/boot/dts/vt8500/wm8950.dtsi
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2025 Alexey Charkov <alchark@gmail.com>
+ */
+
+/* No differences have been discovered vs. WM8850, but chip markings differ */
+/include/ "wm8850.dtsi"
+
+/ {
+	compatible = "wm,wm8950";
+};

-- 
2.49.0