linux-kernel - [PATCH 2/4] arm64: dts: exynos: gs101: add AP to APM mailbox node

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Message-ID: <20241205180200.203146-3-tudor.ambarus@linaro.org>
Date: Thu,  5 Dec 2024 18:01:58 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	alim.akhtar@...sung.com
Cc: linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	andre.draszik@...aro.org,
	kernel-team@...roid.com,
	willmcvicker@...gle.com,
	peter.griffin@...aro.org,
	javierm@...hat.com,
	tzimmermann@...e.de,
	daniel.lezcano@...aro.org,
	vincent.guittot@...aro.org,
	ulf.hansson@...aro.org,
	arnd@...db.de,
	Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 2/4] arm64: dts: exynos: gs101: add AP to APM mailbox node

GS101 has 14 mailbox controllers. Add the AP to APM mailbox node.

Mailbox controllers have a shared register that can be used for passing
the mailbox messages. The AP to APM mailbox controller is used just as a
doorbell mechanism. It raises interrupt to the firmware after the mailbox
message has been written to SRAM where the TX/RX rings are defined.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 arch/arm64/boot/dts/exynos/google/gs101.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
index 1441e9a252c2..0970f6fc1ef5 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
+++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
@@ -1445,6 +1445,15 @@ wakeup-interrupt-controller {
 			};
 		};
 
+		ap2apm_mailbox: mailbox@...10000 {
+			compatible = "google,gs101-acpm-mbox";
+			reg = <0x17610000 0x1000>;
+			clocks = <&cmu_apm CLK_GOUT_APM_MAILBOX_APM_AP_PCLK>;
+			clock-names = "pclk";
+			interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH 0>;
+			#mbox-cells = <1>;
+		};
+
 		pinctrl_gsactrl: pinctrl@...40000 {
 			compatible = "google,gs101-pinctrl";
 			reg = <0x17940000 0x00001000>;
-- 
2.47.0.338.g60cca15819-goog