Re: [RFC][PATCH 4/4] arm64: dts: hikey: Add pstore support for HiKey

This patch reserves some memory in the DTS and sets up a
pstore device tree node to enable pstore support on HiKey.

Cc: Kees Cook <redacted>
Cc: Guodong Xu <redacted>
Cc: Haojian Zhuang <haojian.zhuang@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 <redacted>
Cc: linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org
Signed-off-by: John Stultz <redacted>
---
 arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
index b2683e4..9140306 100644
--- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
+++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts

@@ -32,6 +32,7 @@
         *  0x05f0,1000 - 0x05f0,1fff: Reboot reason
         *  0x06df,f000 - 0x06df,ffff: Mailbox message data
         *  0x0740,f000 - 0x0740,ffff: MCU firmware section
+        *  0x21f0,0000 - 0x21ff,ffff: pstore/ramoops buffer
         *  0x3e00,0000 - 0x3fff,ffff: OP-TEE
         */
        memory@0 {

@@ -40,7 +41,21 @@
                      <0x00000000 0x05f00000 0x00000000 0x00001000>,
                      <0x00000000 0x05f02000 0x00000000 0x00efd000>,
                      <0x00000000 0x06e00000 0x00000000 0x0060f000>,
-                     <0x00000000 0x07410000 0x00000000 0x36bf0000>;
+                     <0x00000000 0x07410000 0x00000000 0x1aaf0000>,
+                     <0x00000000 0x22000000 0x00000000 0x1c000000>;
+       };
+
+       pstore: pstore@0x21f00000 {
+               no-map;
+               reg = <0x0 0x21f00000 0x0 0x00100000>;  /* pstore buffer */
+       };
+
+       ramoops {
+               compatible = "ramoops";
+               memory-region = <&pstore>;
+               record-size     = <0x0 0x00020000>;
+               console-size    = <0x0 0x00020000>;
+               ftrace-size     = <0x0 0x00020000>;
        };

        reboot-mode-syscon@5f01000 {