From: Igor Velkov via B4 Relay <devnull+iav.iav.lv@kernel.org>
To: John Stultz <jstultz@google.com>,
Thomas Gleixner <tglx@kernel.org>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>,
Miroslav Lichvar <mlichvar@redhat.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-rtc@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
Igor Velkov <iav@iav.lv>
Subject: [PATCH RFC 3/3] arm64: dts: amlogic: meson-sm1-odroid-hc4: Describe which RTC wakes the board
Date: Wed, 04 Nov 2026 05:54:39 +0000 [thread overview]
Message-ID: <20261104-b4-alarmtimer-rtc-priority-v1-3-e996681b8086@iav.lv> (raw)
In-Reply-To: <20261104-b4-alarmtimer-rtc-priority-v1-0-e996681b8086@iav.lv>
From: Igor Velkov <iav@iav.lv>
The board has two RTCs with an alarm. The pcf8563 interrupt line goes
to GPIOX_5, so once that interrupt is described [1], its alarm wakes the
board from s2idle but not from deep sleep. meson-vrtc is a register the
SoC firmware reads when the application processors suspend, so it wakes
the board from deep sleep only, and only with a BL301 that handles its
alarm.
List the states per RTC, so that alarmtimer programs the pcf8563 for
s2idle and meson-vrtc for deep sleep.
Link: https://lore.kernel.org/r/20261020-hc4-rtc-alarm-irq-v1-1-b2b8c68d54f5@iav.lv [1]
Signed-off-by: Igor Velkov <iav@iav.lv>
---
arch/arm64/boot/dts/amlogic/meson-sm1-odroid-hc4.dts | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-hc4.dts b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-hc4.dts
index 3ece30a0a1ff..935dd31572cb 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-hc4.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-hc4.dts
@@ -106,6 +106,7 @@ rtc: rtc@51 {
compatible = "nxp,pcf8563";
reg = <0x51>;
wakeup-source;
+ linux,wakeup-states = "s2idle";
};
};
@@ -142,3 +143,7 @@ &usb {
phys = <&usb2_phy0>, <&usb2_phy1>;
phy-names = "usb2-phy0", "usb2-phy1";
};
+
+&vrtc {
+ linux,wakeup-states = "deep";
+};
--
2.43.0
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next prev parent reply other threads:[~2026-11-04 5:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-04 5:54 [PATCH RFC 0/3] alarmtimer: Choose the wakeup RTC per sleep state from the device tree Igor Velkov via B4 Relay
2026-11-04 5:54 ` [PATCH RFC 1/3] dt-bindings: rtc: Add linux,wakeup-states and linux,alarmtimer-priority Igor Velkov via B4 Relay
2026-11-04 6:06 ` sashiko-bot
2026-11-04 5:54 ` [PATCH RFC 2/3] alarmtimer: Choose the wakeup RTC by sleep state and priority Igor Velkov via B4 Relay
2026-11-04 5:54 ` Igor Velkov via B4 Relay [this message]
2026-11-04 8:50 ` [PATCH RFC 0/3] alarmtimer: Choose the wakeup RTC per sleep state from the device tree Neil Armstrong
2026-11-04 18:38 ` Igor Velkov
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