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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";
};
};
|
