Commit e112f2de authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Lee Jones
Browse files

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: default avatarRafał Miłecki <rafal@milecki.pl>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarLee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20221028115353.13881-1-zajec5@gmail.com
parent 727b67e3

Documentation/devicetree/bindings/mfd/brcm,twd.yaml

+8 −0
Original line number Diff line number Diff line
@@ -36,6 +36,9 @@ properties: 
    const: 1



patternProperties:

  '^timer@[a-f0-9]+$':

    $ref: /schemas/timer/brcm,bcmbca-timer.yaml



  '^watchdog@[a-f0-9]+$':

    $ref: /schemas/watchdog/brcm,bcm7038-wdt.yaml
@@ -54,6 +57,11 @@ examples: 
        #address-cells = <1>;

        #size-cells = <1>;



        timer@0 {

            compatible = "brcm,bcm63138-timer";

            reg = <0x0 0x28>;

        };



        watchdog@28 {

            compatible = "brcm,bcm7038-wdt";

            reg = <0x28 0x8>;

Documentation/devicetree/bindings/timer/brcm,bcmbca-timer.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/timer/brcm,bcmbca-timer.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Broadcom Broadband SoC timer



maintainers:

  - Rafał Miłecki <rafal@milecki.pl>



properties:

  compatible:

    oneOf:

      - const: brcm,bcm6345-timer

        description: >

          An old block with 3 timers.



          It can be found in BCM6345, BCM6838 and BCM63268.

      - const: brcm,bcm63138-timer

        description: >

          Updated block with 4 timers and control regs at the beginning.



          It can be found in newer SoCs, e.g. BCM63138, BCM63148, BCM63381,

          BCM68360, BCM6848, BCM6858, BCM4908.



  reg:

    maxItems: 1



additionalProperties: false



required:

  - reg



examples:

  - |

    timer@fffe0200 {

      compatible = "brcm,bcm6345-timer";

      reg = <0xfffe0200 0x1c>;

    };