drivers: flash: NXP KL2X/KW4xZ: Add device tree support

Add device tree support for the "nxp,kinetis-ftfa" flash controller used
on the NXP KL2X and KW4xZ SoCs.

Fixes: zephyrproject-rtos#5788

Signed-off-by: Kumar Gala <[email protected]>

Author: galak

arch/arm/soc/nxp_kinetis/kl2x/dts.fixup

@@ -0,0 +1,6 @@
+/* SoC level DTS fixup file */
+
+#define FLASH_DEV_BASE_ADDRESS		NXP_KINETIS_FTFA_40020000_BASE_ADDRESS_0
+#define FLASH_DEV_NAME			NXP_KINETIS_FTFA_40020000_LABEL
+
+/* End of SoC Level DTS fixup file */

arch/arm/soc/nxp_kinetis/kwx/dts.fixup

@@ -5,4 +5,8 @@
 #define FLASH_DEV_NAME			NXP_KINETIS_FTFL_40020000_LABEL
 #endif /* CONFIG_SOC_MKW22D5 || CONFIG_SOC_MKW24D5 */
 
+#if defined(CONFIG_SOC_MKW40Z4) || defined(CONFIG_SOC_MKW41Z4)
+#define FLASH_DEV_BASE_ADDRESS		NXP_KINETIS_FTFA_40020000_BASE_ADDRESS_0
+#define FLASH_DEV_NAME			NXP_KINETIS_FTFA_40020000_LABEL
+#endif /* CONFIG_SOC_MKW40Z4 || CONFIG_SOC_MKW41Z4 */
 /* End of SoC Level DTS fixup file */

dts/arm/nxp/nxp_kl25z.dtsi

@@ -21,11 +21,21 @@
 	};
 
 	soc {
-		flash0: flash@0 {
-			compatible = "soc-nv-flash";
-			label = "MCUX_FLASH";
-			reg = <0 0x20000>;
-			write-block-size = <4>;
+		flash-controller@40020000 {
+			compatible = "nxp,kinetis-ftfa";
+			label = "FLASH_CTRL";
+			reg = <0x40020000 0x14>;
+			interrupts = <5 0>;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			flash0: flash@0 {
+				compatible = "soc-nv-flash";
+				label = "MCUX_FLASH";
+				reg = <0 0x20000>;
+				write-block-size = <4>;
+			};
 		};
 
 		i2c0: i2c@40066000 {

dts/arm/nxp/nxp_kw40z.dtsi

@@ -49,11 +49,21 @@
 			#clocks-cells = <3>;
 		};
 
-		flash0: flash@0 {
-			compatible = "soc-nv-flash";
-			label = "MCUX_FLASH";
-			reg = <0 0x80000>;
-			write-block-size = <4>;
+		flash-controller@40020000 {
+			compatible = "nxp,kinetis-ftfa";
+			label = "FLASH_CTRL";
+			reg = <0x40020000 0x2c>;
+			interrupts = <5 0>;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			flash0: flash@0 {
+				compatible = "soc-nv-flash";
+				label = "MCUX_FLASH";
+				reg = <0 0x80000>;
+				write-block-size = <4>;
+			};
 		};
 
 		i2c0: i2c@40066000 {

dts/arm/nxp/nxp_kw41z.dtsi

@@ -49,11 +49,21 @@
 			#clocks-cells = <3>;
 		};
 
-		flash0: flash@0 {
-			compatible = "soc-nv-flash";
-			label = "MCUX_FLASH";
-			reg = <0 0x80000>;
-			write-block-size = <4>;
+		flash-controller@40020000 {
+			compatible = "nxp,kinetis-ftfa";
+			label = "FLASH_CTRL";
+			reg = <0x40020000 0x2c>;
+			interrupts = <5 0>;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			flash0: flash@0 {
+				compatible = "soc-nv-flash";
+				label = "MCUX_FLASH";
+				reg = <0 0x80000>;
+				write-block-size = <4>;
+			};
 		};
 
 		i2c0: i2c@40066000 {

dts/bindings/flash_controller/nxp,kinetis-ftfa.yaml

@@ -0,0 +1,19 @@
+---
+title: NXP Kinetis Flash Memory Module (FTFA)
+id: nxp,kinetis-ftfa
+version: 0.1
+
+description: >
+    This binding gives for the NXP Kinetis Flash Memory Module A (FTFA)
+
+inherits:
+    !include flash-controller.yaml
+
+properties:
+    compatible:
+      type: string
+      category: required
+      description: compatible strings
+      constraint: "nxp,kinetis-ftfa"
+
+...