[PATCH v3 2/4] arm64: dts: exynos: gs101: add AP to APM mailbox node

[Tudor Ambarus]

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 at linaro.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..6947dd081a0e 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 at 17610000 {
+			compatible = "google,gs101-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 = <0>;
+		};
+
 		pinctrl_gsactrl: pinctrl at 17940000 {
 			compatible = "google,gs101-pinctrl";
 			reg = <0x17940000 0x00001000>;

-- 
2.47.1.613.gc27f4b7a9f-goog