[RFC PATCH 3/5] arm64: dts: sunxi: add SCPI node to sun50i-a64.dtsi
From: Andre Przywara <hidden>
Date: 2016-08-09 11:52:14
Also in:
linux-arm-kernel, lkml
Subsystem:
arm/allwinner sunxi soc support, the rest · Maintainers:
Chen-Yu Tsai, Jernej Skrabec, Samuel Holland, Linus Torvalds
Support for variable frequency clocks is implemented in ARM Trusted Firmware, which sits in SRAM and waits for SCPI requests. Add the respective SMC mailbox node and a 512-byte chunk of SRAM to allow SCPI calls to be handled by the firmware. Signed-off-by: Andre Przywara <redacted> --- arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 70d0382..9fc540e 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi@@ -131,8 +131,34 @@ (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>; }; + mailbox: mbox@0 { + compatible = "arm,smc-mbox"; + #mbox-cells = <1>; + identifiers = <0x82000001>; + }; + + sram: sram@18000{ + compatible = "mmio-sram"; + reg = <0x10000 0x8000>; + + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x10000 0x8000>; + + cpu_scp_mem: scp-shmem@7e00 { + compatible = "mmio-sram"; + reg = <0x7e00 0x200>; + }; + }; + /include/ "sun50i-a64-clocks.dtsi" + scpi { + compatible = "arm,scpi"; + mboxes = <&mailbox 0>; + shmem = <&cpu_scp_mem>; + }; + soc { compatible = "simple-bus"; #address-cells = <1>;
--
2.9.0