[PATCH v7 3/4] arm64: dts: imx8m: add NVMEM provider and consumer to read soc unique ID

[Alice Guo (OSS)]

From: Alice Guo <alice.guo@xxxxxxx>

In order to be able to use NVMEM APIs to read soc unique ID, add the
nvmem data cell and name for nvmem-cells to the "soc" node, and add a
nvmem node which provides soc unique ID to efuse@30350000.

Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Signed-off-by: Alice Guo <alice.guo@xxxxxxx>
---

Changes for v7:
 - add Reviewed-by
Changes for v6:
 - leave only the changelog under '---'
Changes for v5:
 - change underscore of device node to hyphen
Changes for v4:
 - delete "stuff" in subject and commit message
 - add detailed description
Changes for v3:
 - convert register addresses and sizes to hex
Changes for v2:
 - remove the subject prefix "LF-2571-3"

 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 6 ++++++
 arch/arm64/boot/dts/freescale/imx8mn.dtsi | 6 ++++++
 arch/arm64/boot/dts/freescale/imx8mp.dtsi | 6 ++++++
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 6 ++++++
 4 files changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index d457ce815e68..9bee6f1889a4 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -261,6 +261,8 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x0 0x3e000000>;
+		nvmem-cells = <&imx8mm_uid>;
+		nvmem-cell-names = "soc_unique_id";

 		aips1: bus@30000000 {
 			compatible = "fsl,aips-bus", "simple-bus";
@@ -518,6 +520,10 @@
 				#address-cells = <1>;
 				#size-cells = <1>;

+				imx8mm_uid: unique-id@410 {
+					reg = <0x4 0x8>;
+				};
+
 				cpu_speed_grade: speed-grade@10 {
 					reg = <0x10 4>;
 				};
diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index db50e6e01ac5..b344fdc16534 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -245,6 +245,8 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x0 0x3e000000>;
+		nvmem-cells = <&imx8mn_uid>;
+		nvmem-cell-names = "soc_unique_id";

 		aips1: bus@30000000 {
 			compatible = "fsl,aips-bus", "simple-bus";
@@ -531,6 +533,10 @@
 				#address-cells = <1>;
 				#size-cells = <1>;

+				imx8mn_uid: unique-id@410 {
+					reg = <0x4 0x8>;
+				};
+
 				cpu_speed_grade: speed-grade@10 {
 					reg = <0x10 4>;
 				};
diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index ec6ac523ecfc..9401e92f1c84 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -222,6 +222,8 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x0 0x3e000000>;
+		nvmem-cells = <&imx8mp_uid>;
+		nvmem-cell-names = "soc_unique_id";

 		aips1: bus@30000000 {
 			compatible = "fsl,aips-bus", "simple-bus";
@@ -328,6 +330,10 @@
 				#address-cells = <1>;
 				#size-cells = <1>;

+				imx8mp_uid: unique-id@420 {
+					reg = <0x8 0x8>;
+				};
+
 				cpu_speed_grade: speed-grade@10 {
 					reg = <0x10 4>;
 				};
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 9b6d9307e5d7..a2a885f1a07a 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -291,6 +291,8 @@
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x0 0x3e000000>;
 		dma-ranges = <0x40000000 0x0 0x40000000 0xc0000000>;
+		nvmem-cells = <&imx8mq_uid>;
+		nvmem-cell-names = "soc_unique_id";

 		bus@30000000 { /* AIPS1 */
 			compatible = "fsl,aips-bus", "simple-bus";
@@ -555,6 +557,10 @@
 				#address-cells = <1>;
 				#size-cells = <1>;

+				imx8mq_uid: soc-uid@410 {
+					reg = <0x4 0x8>;
+				};
+
 				cpu_speed_grade: speed-grade@10 {
 					reg = <0x10 4>;
 				};
--
2.17.1