dts: arm: st: h7: add max-erase-time property to the flash node

The erase time for a sector differs by a few order of magnitude for the
various SoCs of the STM32H7 family. Declare it in the device tree using
the existing max-erase-time property. For that it is necessary to add
"st,stm32-nv-flash" to the compatible node.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

Author: aurel32

dts/arm/st/h7/stm32h723.dtsi

@@ -13,9 +13,11 @@
 	soc {
 		flash-controller@52002000 {
 			flash0: flash@8000000 {
-				compatible = "soc-nv-flash";
+				compatible = "st,stm32-nv-flash", "soc-nv-flash";
 				write-block-size = <32>;
 				erase-block-size = <DT_SIZE_K(128)>;
+				/* maximum erase time for a 128K sector */
+				max-erase-time = <4000>;
 				label = "FLASH_STM32";
 			};
 		};

dts/arm/st/h7/stm32h743.dtsi

@@ -11,10 +11,12 @@
 	soc {
 		flash-controller@52002000 {
 			flash0: flash@8000000 {
-				compatible = "soc-nv-flash";
+				compatible = "st,stm32-nv-flash", "soc-nv-flash";
 				label = "FLASH_STM32";
 				write-block-size = <32>;
 				erase-block-size = <DT_SIZE_K(128)>;
+				/* maximum erase time for a 128K sector */
+				max-erase-time = <4000>;
 			};
 		};
 

dts/arm/st/h7/stm32h745.dtsi

@@ -11,14 +11,18 @@
 	soc {
 		flash-controller@52002000 {
 			flash0: flash@8000000 {
-				compatible = "soc-nv-flash";
+				compatible = "st,stm32-nv-flash", "soc-nv-flash";
 				write-block-size = <32>;
 				erase-block-size = <DT_SIZE_K(128)>;
+				/* maximum erase time for a 128K sector */
+				max-erase-time = <4000>;
 			};
 			flash1: flash@8100000 {
-				compatible = "soc-nv-flash";
+				compatible = "st,stm32-nv-flash", "soc-nv-flash";
 				write-block-size = <32>;
 				erase-block-size = <DT_SIZE_K(128)>;
+				/* maximum erase time for a 128K sector */
+				max-erase-time = <4000>;
 			};
 		};
 

dts/arm/st/h7/stm32h750.dtsi

@@ -11,9 +11,11 @@
 	soc {
 		flash-controller@52002000 {
 			flash0: flash@8000000 {
-				compatible = "soc-nv-flash";
+				compatible = "st,stm32-nv-flash", "soc-nv-flash";
 				write-block-size = <32>;
 				erase-block-size = <DT_SIZE_K(128)>;
+				/* maximum erase time for a 128K sector */
+				max-erase-time = <4000>;
 			};
 		};
 

dts/arm/st/h7/stm32h7a3.dtsi

@@ -11,10 +11,12 @@
 	soc {
 		flash-controller@52002000 {
 			flash0: flash@8000000 {
-				compatible = "soc-nv-flash";
+				compatible = "st,stm32-nv-flash", "soc-nv-flash";
 				label = "FLASH_STM32";
 				write-block-size = <16>;
 				erase-block-size = <DT_SIZE_K(8)>;
+				/* maximum erase time for a 8K sector */
+				max-erase-time = <3>;
 			};
 		};