arm64: dts: hikey: Add hikey support for syscon-reboot-mode

Add support to hikey dts for the syscon-reboot-mode driver.

After trying an approach using a sram driver and node, a number
of issues cropped up which would make it so we would be
duplicating a lot of extra syscon infrastructure in order to
support mfds on sram. After talking with Bjorn, using the
syscon driver for this seems like an better choice.

Cc: Andy Yan <andy.yan@rock-chips.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
index bdf9310..49d53ff 100644 (file)
--- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
+++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
@@ -29,6 +29,7 @@
         * Reserve below regions from memory node:
         *
         *  0x05e0,0000 - 0x05ef,ffff: MCU firmware runtime using
+        *  0x05f0,1000 - 0x05f0,1fff: Reboot reason
         *  0x06df,f000 - 0x06df,ffff: Mailbox message data
         *  0x0740,f000 - 0x0740,ffff: MCU firmware section
         *  0x3e00,0000 - 0x3fff,ffff: OP-TEE
@@ -36,11 +37,26 @@
        memory@0 {
                device_type = "memory";
                reg = <0x00000000 0x00000000 0x00000000 0x05e00000>,
-                     <0x00000000 0x05f00000 0x00000000 0x00eff000>,
+                     <0x00000000 0x05f00000 0x00000000 0x00001000>,
+                     <0x00000000 0x05f02000 0x00000000 0x00efd000>,
                      <0x00000000 0x06e00000 0x00000000 0x0060f000>,
                      <0x00000000 0x07410000 0x00000000 0x36bf0000>;
        };
 
+       reboot-mode-syscon@5f01000 {
+               compatible = "syscon", "simple-mfd";
+               reg = <0x0 0x05f01000 0x0 0x00001000>;
+
+               reboot-mode {
+                       compatible = "syscon-reboot-mode";
+                       offset = <0x0>;
+
+                       mode-normal     = <0x77665501>;
+                       mode-bootloader = <0x77665500>;
+                       mode-recovery   = <0x77665502>;
+               };
+       };
+
        soc {
                spi0: spi@f7106000 {
                        status = "ok";