[PATCH 1/3] dt-bindings: watchdog: sunxi: Add compatible for R329
From: Samuel Holland <samuel@sholland.org>
Date: 2021-07-26 03:52:04
Also in:
linux-devicetree, linux-sunxi, linux-watchdog, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest, watchdog device drivers · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Wim Van Sebroeck, Guenter Roeck
On existing SoCs, the watchdog has a single clock input: HOSC (OSC24M) divided by 750. However, starting with R329, LOSC (OSC32k) is added as an alternative clock source, with a bit to switch between them. Since 24 MHz / 750 == 32 kHz, not 32.768 kHz, the hardware adjusts the cycle counts to keep the timeouts independent of the clock source. This keeps the programming interface backward-compatible. R329 also adds two new registers, to allow software to immediately drive the SoC reset signal. Signed-off-by: Samuel Holland <samuel@sholland.org> --- .../watchdog/allwinner,sun4i-a10-wdt.yaml | 30 ++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml b/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml
index 9aa3c313c49f..853ceb1b7c0f 100644
--- a/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml@@ -24,6 +24,7 @@ properties: - allwinner,sun50i-a100-wdt - allwinner,sun50i-h6-wdt - allwinner,sun50i-h616-wdt + - allwinner,sun50i-r329-wdt - const: allwinner,sun6i-a31-wdt - items: - const: allwinner,suniv-f1c100s-wdt
@@ -33,7 +34,16 @@ properties: maxItems: 1 clocks: - maxItems: 1 + minItems: 1 + maxItems: 2 + + clock-names: + minItems: 1 + maxItems: 2 + items: + enum: + - hosc + - losc interrupts: maxItems: 1
@@ -44,6 +54,24 @@ required: - clocks - interrupts +if: + properties: + compatible: + contains: + enum: + - allwinner,sun50i-r329-wdt + +then: + properties: + clocks: + minItems: 2 + + clock-names: + minItems: 2 + + required: + - clock-names + unevaluatedProperties: false examples:
--
2.31.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel