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Subject[PATCH v2] arm64: dts: mt8173-oak: Switch to SMC watchdog
Date
Switch to SMC watchdog because we need direct control of HW watchdog
registers from kernel. The corresponding firmware was uploaded in
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405.

Signed-off-by: Pin-yen Lin <treapking@chromium.org>
---

Changes in v2:
- Move the modifications to mt8173-elm.dtsi and add some comments.

arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
index e21feb85d822..b2269770abc3 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
@@ -161,6 +161,18 @@ hdmi_connector_in: endpoint {
};
};
};
+
+ soc {
+ /*
+ * Disable the original MMIO watch dog and switch to the SMC watchdog,
+ * which operates on the same MMIO.
+ */
+ /delete-node/ watchdog@10007000;
+
+ watchdog {
+ compatible = "arm,smc-wdt";
+ };
+ };
};

&mfg_async {
--
2.37.1.359.gd136c6c3e2-goog
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