X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0782-overlays-Make-mcp342x-run-time-compatible.patch;fp=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0782-overlays-Make-mcp342x-run-time-compatible.patch;h=900cbb2ca852b100da342729f61696d34e1b52ed;hb=c2308a7e4adbb2acc8ff149f91d1ca46801c135e;hp=0000000000000000000000000000000000000000;hpb=67dcc43f3a22dc3a7ac07a7065971b426feeb043;p=openwrt%2Fstaging%2Fdedeckeh.git

diff --git a/target/linux/brcm2708/patches-4.19/950-0782-overlays-Make-mcp342x-run-time-compatible.patch b/target/linux/brcm2708/patches-4.19/950-0782-overlays-Make-mcp342x-run-time-compatible.patch
new file mode 100644
index 0000000000..900cbb2ca8
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0782-overlays-Make-mcp342x-run-time-compatible.patch
@@ -0,0 +1,209 @@
+From e650f4bfbe9a09e5b75d702884a8ba8d9df6ccdf Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 9 Dec 2019 12:32:20 +0000
+Subject: [PATCH] overlays: Make mcp342x run-time compatible
+
+The order of processing of run-time overlays differs from that done by
+the firmware. This means that certain parameter processing techniques
+are not compatible with run-time use.  The mcp342x overlay is one such
+overlay, but it is easy to change the implementation without changing
+the interface.
+
+See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=258294
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ .../arm/boot/dts/overlays/mcp342x-overlay.dts | 133 ++++++++++++++----
+ 1 file changed, 102 insertions(+), 31 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/mcp342x-overlay.dts
++++ b/arch/arm/boot/dts/overlays/mcp342x-overlay.dts
+@@ -8,14 +8,15 @@
+ 
+ 	fragment@0 {
+ 		target = <&i2c1>;
+-		__overlay__ {
++		__dormant__ {
+ 			#address-cells = <1>;
+ 			#size-cells = <0>;
+ 
+ 			status = "okay";
+ 
+-			mcp342x: mcp@68 {
++			mcp3421: mcp@68 {
+ 				reg = <0x68>;
++				compatible = "microchip,mcp3421";
+ 
+ 				status = "okay";
+ 			};
+@@ -23,71 +24,141 @@
+ 	};
+ 
+ 	fragment@1 {
+-		target = <&mcp342x>;
++		target = <&i2c1>;
+ 		__dormant__ {
+-			compatible = "microchip,mcp3421";
++			#address-cells = <1>;
++			#size-cells = <0>;
++
++			status = "okay";
++
++			mcp3422: mcp@68 {
++				reg = <0x68>;
++				compatible = "microchip,mcp3422";
++
++				status = "okay";
++			};
+ 		};
+ 	};
+ 
+ 	fragment@2 {
+-		target = <&mcp342x>;
++		target = <&i2c1>;
+ 		__dormant__ {
+-			compatible = "microchip,mcp3422";
++			#address-cells = <1>;
++			#size-cells = <0>;
++
++			status = "okay";
++
++			mcp3423: mcp@68 {
++				reg = <0x68>;
++				compatible = "microchip,mcp3423";
++
++				status = "okay";
++			};
+ 		};
+ 	};
+ 
+ 	fragment@3 {
+-		target = <&mcp342x>;
++		target = <&i2c1>;
+ 		__dormant__ {
+-			compatible = "microchip,mcp3423";
++			#address-cells = <1>;
++			#size-cells = <0>;
++
++			status = "okay";
++
++			mcp3424: mcp@68 {
++				reg = <0x68>;
++				compatible = "microchip,mcp3424";
++
++				status = "okay";
++			};
+ 		};
+ 	};
+ 
+ 	fragment@4 {
+-		target = <&mcp342x>;
++		target = <&i2c1>;
+ 		__dormant__ {
+-			compatible = "microchip,mcp3424";
++			#address-cells = <1>;
++			#size-cells = <0>;
++
++			status = "okay";
++
++			mcp3425: mcp@68 {
++				reg = <0x68>;
++				compatible = "microchip,mcp3425","mcp3425";
++
++				status = "okay";
++			};
+ 		};
+ 	};
+ 
+ 	fragment@5 {
+-		target = <&mcp342x>;
++		target = <&i2c1>;
+ 		__dormant__ {
+-			compatible = "microchip,mcp3425";
++			#address-cells = <1>;
++			#size-cells = <0>;
++
++			status = "okay";
++
++			mcp3426: mcp@68 {
++				reg = <0x68>;
++				compatible = "microchip,mcp3426";
++
++				status = "okay";
++			};
+ 		};
+ 	};
+ 
+ 	fragment@6 {
+-		target = <&mcp342x>;
++		target = <&i2c1>;
+ 		__dormant__ {
+-			compatible = "microchip,mcp3426";
++			#address-cells = <1>;
++			#size-cells = <0>;
++
++			status = "okay";
++
++			mcp3427: mcp@68 {
++				reg = <0x68>;
++				compatible = "microchip,mcp3427";
++
++				status = "okay";
++			};
+ 		};
+ 	};
+ 
+ 	fragment@7 {
+-		target = <&mcp342x>;
++		target = <&i2c1>;
+ 		__dormant__ {
+-			compatible = "microchip,mcp3427";
+-		};
+-	};
++			#address-cells = <1>;
++			#size-cells = <0>;
+ 
+-	fragment@8 {
+-		target = <&mcp342x>;
+-		__dormant__ {
+-			compatible = "microchip,mcp3428";
++			status = "okay";
++
++			mcp3428: mcp@68 {
++				reg = <0x68>;
++				compatible = "microchip,mcp3428";
++
++				status = "okay";
++			};
+ 		};
+ 	};
+ 
+ 	__overrides__ {
+-		addr = <&mcp342x>,"reg:0";
+-		mcp3421 = <0>,"=1";
+-		mcp3422 = <0>,"=2";
+-		mcp3423 = <0>,"=3";
+-		mcp3424 = <0>,"=4";
+-		mcp3425 = <0>,"=5";
+-		mcp3426 = <0>,"=6";
+-		mcp3427 = <0>,"=7";
+-		mcp3428 = <0>,"=8";
++		addr = <&mcp3421>,"reg:0",
++		       <&mcp3422>,"reg:0",
++		       <&mcp3423>,"reg:0",
++		       <&mcp3424>,"reg:0",
++		       <&mcp3425>,"reg:0",
++		       <&mcp3426>,"reg:0",
++		       <&mcp3427>,"reg:0",
++		       <&mcp3428>,"reg:0";
++		mcp3421 = <0>,"=0";
++		mcp3422 = <0>,"=1";
++		mcp3423 = <0>,"=2";
++		mcp3424 = <0>,"=3";
++		mcp3425 = <0>,"=4";
++		mcp3426 = <0>,"=5";
++		mcp3427 = <0>,"=6";
++		mcp3428 = <0>,"=7";
+ 	};
+ };
+