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[v3,2/7] dt-bindings: watchdog: dw-wdt: Support devices with asynch clocks

Message ID 20200526154123.24402-3-Sergey.Semin@baikalelectronics.ru
State Superseded
Headers show
Series None | expand

Commit Message

Serge Semin May 26, 2020, 3:41 p.m. UTC
DW Watchdog IP core can be synthesised with asynchronous timer/APB
clocks support (WDT_ASYNC_CLK_MODE_ENABLE == 1). In this case
separate clock signals are supposed to be used to feed watchdog timer
and APB interface of the device. Let's update the DW Watchdog DT node
schema so it would support the optional APB3 bus clock specified along
with the mandatory watchdog timer reference clock.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-mips@vger.kernel.org


Changelog v2:
- It's a new patch unpinned from the previous one.
 .../devicetree/bindings/watchdog/snps,dw-wdt.yaml         | 8 ++++++++
 1 file changed, 8 insertions(+)
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diff --git a/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
index 4f6944756ab4..5bf6dc6377f3 100644
--- a/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
@@ -24,8 +24,16 @@  properties:
     maxItems: 1
+    minItems: 1
       - description: Watchdog timer reference clock
+      - description: APB3 interface clock
+  clock-names:
+    minItems: 1
+    items:
+      - const: tclk
+      - const: pclk
     description: Phandle to the DW Watchdog reset lane