dt-bindings: timer: Add Broadcom's BCMBCA timers
BCA is a big set / family of Broadcom devices sharing multiple hardware blocks. One of them is timer that actually exists in two versions. It's a part of TWD MFD block. Add binding for it so SoCs can be properly described. Linux (and probably any other OS) doesn't really seem to need a driver for it. it may be needed for bootloaders (e.g. U-Boot) though. Especially for SoCs with CPUs other than Cortex-A9 (which contains arch timers). Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20221028115353.13881-1-zajec5@gmail.com
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Documentation/devicetree/bindings
@ -36,6 +36,9 @@ properties:
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const: 1
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patternProperties:
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'^timer@[a-f0-9]+$':
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$ref: /schemas/timer/brcm,bcmbca-timer.yaml
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'^watchdog@[a-f0-9]+$':
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$ref: /schemas/watchdog/brcm,bcm7038-wdt.yaml
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@ -54,6 +57,11 @@ examples:
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#address-cells = <1>;
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#size-cells = <1>;
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timer@0 {
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compatible = "brcm,bcm63138-timer";
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reg = <0x0 0x28>;
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};
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watchdog@28 {
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compatible = "brcm,bcm7038-wdt";
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reg = <0x28 0x8>;
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@ -0,0 +1,40 @@
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/timer/brcm,bcmbca-timer.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Broadcom Broadband SoC timer
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maintainers:
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- Rafał Miłecki <rafal@milecki.pl>
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properties:
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compatible:
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oneOf:
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- const: brcm,bcm6345-timer
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description: >
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An old block with 3 timers.
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It can be found in BCM6345, BCM6838 and BCM63268.
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- const: brcm,bcm63138-timer
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description: >
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Updated block with 4 timers and control regs at the beginning.
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It can be found in newer SoCs, e.g. BCM63138, BCM63148, BCM63381,
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BCM68360, BCM6848, BCM6858, BCM4908.
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reg:
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maxItems: 1
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additionalProperties: false
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required:
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- reg
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examples:
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- |
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timer@fffe0200 {
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compatible = "brcm,bcm6345-timer";
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reg = <0xfffe0200 0x1c>;
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};
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