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

Message ID 20200510105807.880-3-Sergey.Semin@baikalelectronics.ru
State New
Headers show
  • watchdog: dw_wdt: Take Baikal-T1 DW WDT peculiarities into account
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Commit Message

Serge Semin May 10, 2020, 10:58 a.m.
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
+    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