openwrt/target/linux/brcm2708/patches-4.19/950-0654-overlays-Add-baudrate-parameter-to-i2c3-i2c6.patch

From 114845b6010b6e6a320804f2d86ab4d5dc5a06de Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 5 Aug 2019 14:17:14 +0100
Subject: [PATCH] overlays: Add baudrate parameter to i2c3-i2c6

The overlays for enabling the new BCM2711 I2C interfaces were lacking
the means to configure the baud/clock rate.

Also explictly set the default pins, rather than relying on the values
in the base DTB.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 arch/arm/boot/dts/overlays/README           |  8 ++++++++
 arch/arm/boot/dts/overlays/i2c3-overlay.dts | 15 ++++++++++++---
 arch/arm/boot/dts/overlays/i2c4-overlay.dts | 15 ++++++++++++---
 arch/arm/boot/dts/overlays/i2c5-overlay.dts | 15 ++++++++++++---
 arch/arm/boot/dts/overlays/i2c6-overlay.dts | 15 ++++++++++++---
 5 files changed, 56 insertions(+), 12 deletions(-)

--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1221,6 +1221,8 @@ Info:   Enable the i2c3 bus
 Load:   dtoverlay=i2c3,<param>
 Params: pins_2_3                Use GPIOs 2 and 3
         pins_4_5                Use GPIOs 4 and 5 (default)
+        baudrate                Set the baudrate for the interface (default
+                                "100000")
 
 
 Name:   i2c4
@@ -1228,6 +1230,8 @@ Info:   Enable the i2c4 bus
 Load:   dtoverlay=i2c4,<param>
 Params: pins_6_7                Use GPIOs 6 and 7
         pins_8_9                Use GPIOs 8 and 9 (default)
+        baudrate                Set the baudrate for the interface (default
+                                "100000")
 
 
 Name:   i2c5
@@ -1235,6 +1239,8 @@ Info:   Enable the i2c5 bus
 Load:   dtoverlay=i2c5,<param>
 Params: pins_10_11              Use GPIOs 10 and 11
         pins_12_13              Use GPIOs 12 and 13 (default)
+        baudrate                Set the baudrate for the interface (default
+                                "100000")
 
 
 Name:   i2c6
@@ -1242,6 +1248,8 @@ Info:   Enable the i2c6 bus
 Load:   dtoverlay=i2c6,<param>
 Params: pins_0_1                Use GPIOs 0 and 1
         pins_22_23              Use GPIOs 22 and 23 (default)
+        baudrate                Set the baudrate for the interface (default
+                                "100000")
 
 
 Name:   i2s-gpio28-31
--- a/arch/arm/boot/dts/overlays/i2c3-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c3-overlay.dts
@@ -6,10 +6,11 @@
 
 	fragment@0 {
 		target = <&i2c3>;
-		__overlay__ {
+		frag0: __overlay__ {
 			status = "okay";
 			pinctrl-names = "default";
 			pinctrl-0 = <&i2c3_pins>;
+			clock-frequency = <100000>;
 		};
 	};
 
@@ -20,8 +21,16 @@
 		};
 	};
 
+	fragment@2 {
+		target = <&i2c3_pins>;
+		__overlay__ {
+			brcm,pins = <4 5>;
+		};
+	};
+
 	__overrides__ {
-		pins_2_3 = <0>,"=1";
-		pins_4_5 = <0>,"!1";
+		pins_2_3 = <0>,"=1!2";
+		pins_4_5 = <0>,"!1=2";
+		baudrate = <&frag0>, "clock-frequency:0";
 	};
 };
--- a/arch/arm/boot/dts/overlays/i2c4-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c4-overlay.dts
@@ -6,10 +6,11 @@
 
 	fragment@0 {
 		target = <&i2c4>;
-		__overlay__ {
+		frag0: __overlay__ {
 			status = "okay";
 			pinctrl-names = "default";
 			pinctrl-0 = <&i2c4_pins>;
+			clock-frequency = <100000>;
 		};
 	};
 
@@ -20,8 +21,16 @@
 		};
 	};
 
+	fragment@2 {
+		target = <&i2c4_pins>;
+		__overlay__ {
+			brcm,pins = <8 9>;
+		};
+	};
+
 	__overrides__ {
-		pins_6_7 = <0>,"=1";
-		pins_8_9 = <0>,"!1";
+		pins_6_7 = <0>,"=1!2";
+		pins_8_9 = <0>,"!1=2";
+		baudrate = <&frag0>, "clock-frequency:0";
 	};
 };
--- a/arch/arm/boot/dts/overlays/i2c5-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c5-overlay.dts
@@ -6,10 +6,11 @@
 
 	fragment@0 {
 		target = <&i2c5>;
-		__overlay__ {
+		frag0: __overlay__ {
 			status = "okay";
 			pinctrl-names = "default";
 			pinctrl-0 = <&i2c5_pins>;
+			clock-frequency = <100000>;
 		};
 	};
 
@@ -20,8 +21,16 @@
 		};
 	};
 
+	fragment@2 {
+		target = <&i2c5_pins>;
+		__overlay__ {
+			brcm,pins = <12 13>;
+		};
+	};
+
 	__overrides__ {
-		pins_10_11 = <0>,"=1";
-		pins_12_13 = <0>,"!1";
+		pins_10_11 = <0>,"=1!2";
+		pins_12_13 = <0>,"!1=2";
+		baudrate = <&frag0>, "clock-frequency:0";
 	};
 };
--- a/arch/arm/boot/dts/overlays/i2c6-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c6-overlay.dts
@@ -6,10 +6,11 @@
 
 	fragment@0 {
 		target = <&i2c6>;
-		__overlay__ {
+		frag0: __overlay__ {
 			status = "okay";
 			pinctrl-names = "default";
 			pinctrl-0 = <&i2c6_pins>;
+			clock-frequency = <100000>;
 		};
 	};
 
@@ -20,8 +21,16 @@
 		};
 	};
 
+	fragment@2 {
+		target = <&i2c6_pins>;
+		__overlay__ {
+			brcm,pins = <22 23>;
+		};
+	};
+
 	__overrides__ {
-		pins_0_1 = <0>,"=1";
-		pins_22_23 = <0>,"!1";
+		pins_0_1 = <0>,"=1!2";
+		pins_22_23 = <0>,"!1=2";
+		baudrate = <&frag0>, "clock-frequency:0";
 	};
 };