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

1 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mfd/brcm,twd.yaml b/Documentation/devicetree/bindings/mfd/brcm,twd.yaml
index 634526f790b8..e5136a37b0a3 100644
--- a/Documentation/devicetree/bindings/mfd/brcm,twd.yaml
+++ b/Documentation/devicetree/bindings/mfd/brcm,twd.yaml
@@ -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>;