linux-kernel - [PATCH V2] ARM: dts: imx: add nvmem property for cpu0

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Message-Id: <1583917326-5550-1-git-send-email-peng.fan@nxp.com>
Date:   Wed, 11 Mar 2020 17:02:06 +0800
From:   peng.fan@....com
To:     shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        Anson.Huang@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH V2] ARM: dts: imx: add nvmem property for cpu0

From: Peng Fan <peng.fan@....com>

Add nvmem related property for cpu0, then nvmem API could be used
to read cpu speed grading to avoid directly read OCOTP registers
mapped which could not handle defer probe.

Signed-off-by: Peng Fan <peng.fan@....com>
---

V2:
 Drop useless blankline

 arch/arm/boot/dts/imx6dl.dtsi  | 2 ++
 arch/arm/boot/dts/imx6q.dtsi   | 2 ++
 arch/arm/boot/dts/imx6qdl.dtsi | 6 ++++++
 arch/arm/boot/dts/imx6sl.dtsi  | 8 ++++++++
 arch/arm/boot/dts/imx6sll.dtsi | 6 ++++++
 arch/arm/boot/dts/imx6sx.dtsi  | 6 ++++++
 6 files changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/imx6dl.dtsi b/arch/arm/boot/dts/imx6dl.dtsi
index 4b3a128d9260..055f1d875bac 100644
--- a/arch/arm/boot/dts/imx6dl.dtsi
+++ b/arch/arm/boot/dts/imx6dl.dtsi
@@ -44,6 +44,8 @@
 			arm-supply = <&reg_arm>;
 			pu-supply = <&reg_pu>;
 			soc-supply = <&reg_soc>;
+			nvmem-cells = <&cpu_speed_grade>;
+			nvmem-cell-names = "speed_grade";
 		};
 
 		cpu@1 {
diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
index 0fad13f9d336..d3ba9d4a1290 100644
--- a/arch/arm/boot/dts/imx6q.dtsi
+++ b/arch/arm/boot/dts/imx6q.dtsi
@@ -49,6 +49,8 @@
 			arm-supply = <&reg_arm>;
 			pu-supply = <&reg_pu>;
 			soc-supply = <&reg_soc>;
+			nvmem-cells = <&cpu_speed_grade>;
+			nvmem-cell-names = "speed_grade";
 		};
 
 		cpu1: cpu@1 {
diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index 70fb8b56b1d7..303131200675 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -1165,6 +1165,12 @@
 				compatible = "fsl,imx6q-ocotp", "syscon";
 				reg = <0x021bc000 0x4000>;
 				clocks = <&clks IMX6QDL_CLK_IIM>;
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				cpu_speed_grade: speed-grade@10 {
+					reg = <0x10 4>;
+				};
 			};
 
 			tzasc@...0000 { /* TZASC1 */
diff --git a/arch/arm/boot/dts/imx6sl.dtsi b/arch/arm/boot/dts/imx6sl.dtsi
index c8ec46fe8302..ae75fde8877a 100644
--- a/arch/arm/boot/dts/imx6sl.dtsi
+++ b/arch/arm/boot/dts/imx6sl.dtsi
@@ -74,6 +74,8 @@
 			arm-supply = <&reg_arm>;
 			pu-supply = <&reg_pu>;
 			soc-supply = <&reg_soc>;
+			nvmem-cells = <&cpu_speed_grade>;
+			nvmem-cell-names = "speed_grade";
 		};
 	};
 
@@ -953,6 +955,12 @@
 				compatible = "fsl,imx6sl-ocotp", "syscon";
 				reg = <0x021bc000 0x4000>;
 				clocks = <&clks IMX6SL_CLK_OCOTP>;
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				cpu_speed_grade: speed-grade@10 {
+					reg = <0x10 4>;
+				};
 			};
 
 			audmux: audmux@...8000 {
diff --git a/arch/arm/boot/dts/imx6sll.dtsi b/arch/arm/boot/dts/imx6sll.dtsi
index 797f850492fe..6b7fb3cec9f6 100644
--- a/arch/arm/boot/dts/imx6sll.dtsi
+++ b/arch/arm/boot/dts/imx6sll.dtsi
@@ -72,6 +72,8 @@
 				 <&clks IMX6SLL_CLK_PLL1_SYS>;
 			clock-names = "arm", "pll2_pfd2_396m", "step",
 				      "pll1_sw", "pll1_sys";
+			nvmem-cells = <&cpu_speed_grade>;
+			nvmem-cell-names = "speed_grade";
 		};
 	};
 
@@ -791,6 +793,10 @@
 				reg = <0x021bc000 0x4000>;
 				clocks = <&clks IMX6SLL_CLK_OCOTP>;
 
+				cpu_speed_grade: speed-grade@10 {
+					reg = <0x10 4>;
+				};
+
 				tempmon_calib: calib@38 {
 					reg = <0x38 4>;
 				};
diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
index e47d346a3543..63aa19d81b42 100644
--- a/arch/arm/boot/dts/imx6sx.dtsi
+++ b/arch/arm/boot/dts/imx6sx.dtsi
@@ -87,6 +87,8 @@
 				      "pll1_sw", "pll1_sys";
 			arm-supply = <&reg_arm>;
 			soc-supply = <&reg_soc>;
+			nvmem-cells = <&cpu_speed_grade>;
+			nvmem-cell-names = "speed_grade";
 		};
 	};
 
@@ -1058,6 +1060,10 @@
 				reg = <0x021bc000 0x4000>;
 				clocks = <&clks IMX6SX_CLK_OCOTP>;
 
+				cpu_speed_grade: speed-grade@10 {
+					reg = <0x10 4>;
+				};
+
 				tempmon_calib: calib@38 {
 					reg = <0x38 4>;
 				};
-- 
2.16.4