linux-kernel - [PATCH v4 1/5] ARM: tegra: Add device tree node to describe IRAM

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Message-Id: <8ce696bc2b4b1808f6c7f7a967a3dacd954d2a4e.1508448293.git.digetx@gmail.com>
Date:   Fri, 20 Oct 2017 00:34:21 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stephen Warren <swarren@...dotorg.org>,
        Vladimir Zapolskiy <vz@...ia.com>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org,
        devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 1/5] ARM: tegra: Add device tree node to describe IRAM

From: Vladimir Zapolskiy <vz@...ia.com>

All Tegra SoCs contain 256KiB IRAM, which is used to store CPU resume code
and by hardware engines like a video decoder.

Signed-off-by: Vladimir Zapolskiy <vz@...ia.com>
---
 arch/arm/boot/dts/tegra114.dtsi | 8 ++++++++
 arch/arm/boot/dts/tegra124.dtsi | 8 ++++++++
 arch/arm/boot/dts/tegra20.dtsi  | 8 ++++++++
 arch/arm/boot/dts/tegra30.dtsi  | 8 ++++++++
 4 files changed, 32 insertions(+)

diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index 8932ea3afd5f..13f6087790c8 100644
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -10,6 +10,14 @@
 	compatible = "nvidia,tegra114";
 	interrupt-parent = <&lic>;
 
+	iram@...00000 {
+		compatible = "mmio-sram";
+		reg = <0x40000000 0x40000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x40000000 0x40000>;
+	};
+
 	host1x@...00000 {
 		compatible = "nvidia,tegra114-host1x", "simple-bus";
 		reg = <0x50000000 0x00028000>;
diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
index 8baf00b89efb..a3585ed82646 100644
--- a/arch/arm/boot/dts/tegra124.dtsi
+++ b/arch/arm/boot/dts/tegra124.dtsi
@@ -14,6 +14,14 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	iram@...00000 {
+		compatible = "mmio-sram";
+		reg = <0x0 0x40000000 0x0 0x40000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x0 0x40000000 0x40000>;
+	};
+
 	pcie@...3000 {
 		compatible = "nvidia,tegra124-pcie";
 		device_type = "pci";
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index 7c85f97f72ea..aaf32f96f1e8 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -9,6 +9,14 @@
 	compatible = "nvidia,tegra20";
 	interrupt-parent = <&lic>;
 
+	iram@...00000 {
+		compatible = "mmio-sram";
+		reg = <0x40000000 0x40000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x40000000 0x40000>;
+	};
+
 	host1x@...00000 {
 		compatible = "nvidia,tegra20-host1x", "simple-bus";
 		reg = <0x50000000 0x00024000>;
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index 13960fda7471..3b447c64bf69 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -10,6 +10,14 @@
 	compatible = "nvidia,tegra30";
 	interrupt-parent = <&lic>;
 
+	iram@...00000 {
+		compatible = "mmio-sram";
+		reg = <0x40000000 0x40000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x40000000 0x40000>;
+	};
+
 	pcie@...0 {
 		compatible = "nvidia,tegra30-pcie";
 		device_type = "pci";
-- 
2.14.2