[PATCH V4 RESEND 2/2] dt-bindings: mfd: add Broadcom's Timer-Watchdog block
From: Rafał Miłecki <zajec5@gmail.com>
Date: 2021-11-15 05:54:29
Also in:
linux-arm-kernel, linux-mips, linux-watchdog
Subsystem:
multifunction devices (mfd), open firmware and flattened device tree bindings, the rest · Maintainers:
Lee Jones, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Rafał Miłecki <rafal@milecki.pl> It's a block implementing few time related functions depending on a (SoC specific) variant. At this point there is ready binding for a watchdog only. Work on remaining subblocks (e.g. "reg" based reboot) is in progress. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> --- V2: Update $id, description, compatible, example & commit message V3: Drop "brcm,twd" from compatible list per Rob's review RESEND: Patchwork lost 1/2, marc.info lost 2/2 --- .../devicetree/bindings/mfd/brcm,twd.yaml | 61 +++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/brcm,twd.yaml
diff --git a/Documentation/devicetree/bindings/mfd/brcm,twd.yaml b/Documentation/devicetree/bindings/mfd/brcm,twd.yaml
new file mode 100644
index 000000000000..634526f790b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/brcm,twd.yaml@@ -0,0 +1,61 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/brcm,twd.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadcom's Timer-Watchdog (aka TWD) + +maintainers: + - Rafał Miłecki <rafal@milecki.pl> + +description: | + Broadcom has a Timer-Watchdog block used in multiple SoCs (e.g., BCM4908, + BCM63xx, BCM7038). There are few variants available (they differ slightly in + registers layout). This block consists of: timers, watchdog and optionally a + software reset handler. + +properties: + compatible: + items: + - enum: + - brcm,bcm4908-twd + - brcm,bcm7038-twd + - const: simple-mfd + - const: syscon + + reg: + maxItems: 1 + + ranges: true + + "#address-cells": + const: 1 + + "#size-cells": + const: 1 + +patternProperties: + '^watchdog@[a-f0-9]+$': + $ref: /schemas/watchdog/brcm,bcm7038-wdt.yaml + +additionalProperties: false + +required: + - reg + +examples: + - | + timer-mfd@ff800400 { + compatible = "brcm,bcm4908-twd", "simple-mfd", "syscon"; + reg = <0xff800400 0x4c>; + ranges = <0x00000000 0xff800400 0x4c>; + + #address-cells = <1>; + #size-cells = <1>; + + watchdog@28 { + compatible = "brcm,bcm7038-wdt"; + reg = <0x28 0x8>; + }; + };
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2.31.1