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195 lines
4.7 KiB
Diff
195 lines
4.7 KiB
Diff
From 114845b6010b6e6a320804f2d86ab4d5dc5a06de Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 5 Aug 2019 14:17:14 +0100
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Subject: [PATCH] overlays: Add baudrate parameter to i2c3-i2c6
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The overlays for enabling the new BCM2711 I2C interfaces were lacking
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the means to configure the baud/clock rate.
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Also explictly set the default pins, rather than relying on the values
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in the base DTB.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/README | 8 ++++++++
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arch/arm/boot/dts/overlays/i2c3-overlay.dts | 15 ++++++++++++---
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arch/arm/boot/dts/overlays/i2c4-overlay.dts | 15 ++++++++++++---
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arch/arm/boot/dts/overlays/i2c5-overlay.dts | 15 ++++++++++++---
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arch/arm/boot/dts/overlays/i2c6-overlay.dts | 15 ++++++++++++---
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5 files changed, 56 insertions(+), 12 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -1221,6 +1221,8 @@ Info: Enable the i2c3 bus
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Load: dtoverlay=i2c3,<param>
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Params: pins_2_3 Use GPIOs 2 and 3
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pins_4_5 Use GPIOs 4 and 5 (default)
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+ baudrate Set the baudrate for the interface (default
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+ "100000")
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Name: i2c4
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@@ -1228,6 +1230,8 @@ Info: Enable the i2c4 bus
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Load: dtoverlay=i2c4,<param>
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Params: pins_6_7 Use GPIOs 6 and 7
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pins_8_9 Use GPIOs 8 and 9 (default)
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+ baudrate Set the baudrate for the interface (default
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+ "100000")
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Name: i2c5
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@@ -1235,6 +1239,8 @@ Info: Enable the i2c5 bus
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Load: dtoverlay=i2c5,<param>
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Params: pins_10_11 Use GPIOs 10 and 11
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pins_12_13 Use GPIOs 12 and 13 (default)
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+ baudrate Set the baudrate for the interface (default
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+ "100000")
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Name: i2c6
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@@ -1242,6 +1248,8 @@ Info: Enable the i2c6 bus
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Load: dtoverlay=i2c6,<param>
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Params: pins_0_1 Use GPIOs 0 and 1
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pins_22_23 Use GPIOs 22 and 23 (default)
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+ baudrate Set the baudrate for the interface (default
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+ "100000")
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Name: i2s-gpio28-31
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--- a/arch/arm/boot/dts/overlays/i2c3-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/i2c3-overlay.dts
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@@ -6,10 +6,11 @@
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fragment@0 {
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target = <&i2c3>;
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- __overlay__ {
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+ frag0: __overlay__ {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&i2c3_pins>;
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+ clock-frequency = <100000>;
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};
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};
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@@ -20,8 +21,16 @@
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};
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};
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+ fragment@2 {
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+ target = <&i2c3_pins>;
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+ __overlay__ {
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+ brcm,pins = <4 5>;
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+ };
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+ };
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+
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__overrides__ {
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- pins_2_3 = <0>,"=1";
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- pins_4_5 = <0>,"!1";
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+ pins_2_3 = <0>,"=1!2";
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+ pins_4_5 = <0>,"!1=2";
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+ baudrate = <&frag0>, "clock-frequency:0";
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};
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};
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--- a/arch/arm/boot/dts/overlays/i2c4-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/i2c4-overlay.dts
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@@ -6,10 +6,11 @@
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fragment@0 {
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target = <&i2c4>;
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- __overlay__ {
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+ frag0: __overlay__ {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&i2c4_pins>;
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+ clock-frequency = <100000>;
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};
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};
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@@ -20,8 +21,16 @@
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};
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};
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+ fragment@2 {
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+ target = <&i2c4_pins>;
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+ __overlay__ {
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+ brcm,pins = <8 9>;
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+ };
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+ };
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+
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__overrides__ {
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- pins_6_7 = <0>,"=1";
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- pins_8_9 = <0>,"!1";
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+ pins_6_7 = <0>,"=1!2";
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+ pins_8_9 = <0>,"!1=2";
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+ baudrate = <&frag0>, "clock-frequency:0";
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};
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};
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--- a/arch/arm/boot/dts/overlays/i2c5-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/i2c5-overlay.dts
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@@ -6,10 +6,11 @@
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fragment@0 {
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target = <&i2c5>;
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- __overlay__ {
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+ frag0: __overlay__ {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&i2c5_pins>;
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+ clock-frequency = <100000>;
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};
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};
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@@ -20,8 +21,16 @@
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};
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};
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+ fragment@2 {
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+ target = <&i2c5_pins>;
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+ __overlay__ {
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+ brcm,pins = <12 13>;
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+ };
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+ };
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+
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__overrides__ {
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- pins_10_11 = <0>,"=1";
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- pins_12_13 = <0>,"!1";
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+ pins_10_11 = <0>,"=1!2";
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+ pins_12_13 = <0>,"!1=2";
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+ baudrate = <&frag0>, "clock-frequency:0";
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};
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};
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--- a/arch/arm/boot/dts/overlays/i2c6-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/i2c6-overlay.dts
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@@ -6,10 +6,11 @@
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fragment@0 {
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target = <&i2c6>;
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- __overlay__ {
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+ frag0: __overlay__ {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&i2c6_pins>;
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+ clock-frequency = <100000>;
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};
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};
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@@ -20,8 +21,16 @@
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};
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};
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+ fragment@2 {
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+ target = <&i2c6_pins>;
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+ __overlay__ {
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+ brcm,pins = <22 23>;
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+ };
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+ };
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+
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__overrides__ {
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- pins_0_1 = <0>,"=1";
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- pins_22_23 = <0>,"!1";
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+ pins_0_1 = <0>,"=1!2";
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+ pins_22_23 = <0>,"!1=2";
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+ baudrate = <&frag0>, "clock-frequency:0";
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};
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};
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