[PATCH] arm64: tegra: Enable ramoops on Tegra210 and newer

[Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@kernel.org>]

From: Aaron Kling <webgeek1234@gmail.com>

This allows using pstore on all such platforms. There are some
differences per arch:

* Tegra132: Flounder does not appear to enumerate pstore and I do not
  have access to norrin, thus Tegra132 is left out of this commit.
* Tegra210: Does not support ramoops carveouts in the bootloader, instead
  relying on a dowstream driver to allocate the carveout, hence this
  hardcodes a location matching what the downstream driver picks.
* Tegra186 and Tegra194 on cboot: Bootloader fills in the address and
  size in a node specifically named /reserved-memory/ramoops_carveout,
  thus these cannot be renamed.
* Tegra194 and Tegra234 on edk2: Bootloader looks up the node based on
  compatible, however the dt still does not know the address, so keeping
  the node name consistent on Tegra186 and newer.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 arch/arm64/boot/dts/nvidia/tegra186.dtsi | 16 ++++++++++++++++
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 16 ++++++++++++++++
 arch/arm64/boot/dts/nvidia/tegra210.dtsi | 13 +++++++++++++
 arch/arm64/boot/dts/nvidia/tegra234.dtsi | 16 ++++++++++++++++
 4 files changed, 61 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index 2b3bb5d0af17bd521f87db0484fcbe943dd1a797..2e2b27deb957dfd754e42dd03f5a1da5079971dc 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -2051,6 +2051,22 @@ pmu-denver {
 		interrupt-affinity = <&denver_0 &denver_1>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ramoops_carveout {
+			compatible = "ramoops";
+			size = <0x0 0x200000>;
+			record-size = <0x00010000>;
+			console-size = <0x00080000>;
+			alignment = <0x0 0x10000>;
+			alloc-ranges = <0x0 0x0 0x1 0x0>;
+			no-map;
+		};
+	};
+
 	sound {
 		status = "disabled";
 
diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 33f92b77cd9d9e530eae87a4bb8ba61993ceffeb..90ffea161a57a8986c2493573c73e3cf9e2c43c0 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -3105,6 +3105,22 @@ psci {
 		method = "smc";
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ramoops_carveout {
+			compatible = "ramoops";
+			size = <0x0 0x200000>;
+			record-size = <0x00010000>;
+			console-size = <0x00080000>;
+			alignment = <0x0 0x10000>;
+			alloc-ranges = <0x0 0x0 0x1 0x0>;
+			no-map;
+		};
+	};
+
 	tcu: serial {
 		compatible = "nvidia,tegra194-tcu";
 		mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_SM TEGRA_HSP_SM_RX(0)>,
diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index b6c84d195c0ef9ae90721fada09ffd46a9c11fa3..00ae127e8b8af3fe3b95d8ce5986d937a4fc6325 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
@@ -2025,6 +2025,19 @@ pmu {
 				      &{/cpus/cpu@2} &{/cpus/cpu@3}>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ramoops@b0000000 {
+			compatible = "ramoops";
+			reg = <0x0 0xb0000000 0x0 0x200000>;
+			record-size = <0x00010000>;
+			console-size = <0x00080000>;
+		};
+	};
+
 	sound {
 		status = "disabled";
 
diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
index 2601b43b2d8cadeb0d1f428018a82b144aa79392..36f35c6dc774d42aca8871dbfa0e0a16414cb860 100644
--- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
@@ -5723,6 +5723,22 @@ psci {
 		method = "smc";
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ramoops_carveout {
+			compatible = "ramoops";
+			size = <0x0 0x200000>;
+			record-size = <0x00010000>;
+			console-size = <0x00080000>;
+			alignment = <0x0 0x10000>;
+			alloc-ranges = <0x0 0x0 0x1 0x0>;
+			no-map;
+		};
+	};
+
 	tcu: serial {
 		compatible = "nvidia,tegra234-tcu", "nvidia,tegra194-tcu";
 		mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_SM TEGRA_HSP_SM_RX(0)>,

---
base-commit: 91e5bfe317d8f8471fbaa3e70cf66cae1314a516
change-id: 20250404-tegra-pstore-5bed3f721390

Best regards,
-- 
Aaron Kling <webgeek1234@gmail.com>