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

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Date:   Tue, 26 May 2020 18:41:18 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        Rob Herring <robh@...nel.org>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Arnd Bergmann <arnd@...db.de>, <linux-mips@...r.kernel.org>,
        <linux-watchdog@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 2/7] dt-bindings: watchdog: dw-wdt: Support devices with asynch clocks

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@...kalelectronics.ru>
Reviewed-by: Rob Herring <robh@...nel.org>
Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: linux-mips@...r.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(+)

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
 
   clocks:
+    minItems: 1
     items:
       - description: Watchdog timer reference clock
+      - description: APB3 interface clock
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: tclk
+      - const: pclk
 
   resets:
     description: Phandle to the DW Watchdog reset lane
-- 
2.26.2