[PATCH v2 2/7] dt-bindings: watchdog: dw-wdt: Support devices with asynch clocks

[Serge Semin <Sergey.Semin@baikalelectronics.ru>]

DW Watchdog IP core can be synthesised with asynchronous timer/APB
clocks support (WDT_ASYNC_CLK_MODE_ENABLE == 1). In this case
a separate clock signal is supposed to be used to feed watchdog timer
and APB interface of the device. Lets along with the watchdog timer
reference clock expect to have the optional APB3 bus interface clock
sepcified in a DW WDT dt node.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Philipp Zabel <p.zabel@pengutronix.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(+)

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
-- 
2.25.1