aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm2708/patches-4.19/950-0708-overlays-Add-i2c0-and-i2c1-for-regularity.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0708-overlays-Add-i2c0-and-i2c1-for-regularity.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0708-overlays-Add-i2c0-and-i2c1-for-regularity.patch340
1 files changed, 340 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0708-overlays-Add-i2c0-and-i2c1-for-regularity.patch b/target/linux/brcm2708/patches-4.19/950-0708-overlays-Add-i2c0-and-i2c1-for-regularity.patch
new file mode 100644
index 0000000000..db937300ae
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0708-overlays-Add-i2c0-and-i2c1-for-regularity.patch
@@ -0,0 +1,340 @@
+From b61cc000ad6ee771f471a126dc80b7c083730a94 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Wed, 17 Jul 2019 10:08:55 +0100
+Subject: [PATCH 708/725] overlays: Add i2c0 and i2c1 for regularity
+
+The new i2c overlays for pi4 (i2c3, i2c4, i2c5, i2c6) have a
+standardised interface that allows pin groups to be chosen
+atomically rather than as individual pins. Add i2c0 and i2c1
+overlays to fit the naming scheme and parameter usage, deprecating
+i2c0-bcm2708 and i2c1-bcm2708.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/Makefile | 2 +
+ arch/arm/boot/dts/overlays/README | 33 +++++---
+ .../dts/overlays/i2c0-bcm2708-overlay.dts | 77 +++----------------
+ arch/arm/boot/dts/overlays/i2c0-overlay.dts | 61 +++++++++++++++
+ .../dts/overlays/i2c1-bcm2708-overlay.dts | 46 ++---------
+ arch/arm/boot/dts/overlays/i2c1-overlay.dts | 44 +++++++++++
+ 6 files changed, 147 insertions(+), 116 deletions(-)
+ create mode 100644 arch/arm/boot/dts/overlays/i2c0-overlay.dts
+ create mode 100644 arch/arm/boot/dts/overlays/i2c1-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -66,7 +66,9 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ i2c-rtc.dtbo \
+ i2c-rtc-gpio.dtbo \
+ i2c-sensor.dtbo \
++ i2c0.dtbo \
+ i2c0-bcm2708.dtbo \
++ i2c1.dtbo \
+ i2c1-bcm2708.dtbo \
+ i2c3.dtbo \
+ i2c4.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1151,14 +1151,12 @@ Params: addr Set the
+ sensor
+
+
+-Name: i2c0-bcm2708
++Name: i2c0
+ Info: Change i2c0 pin usage. Not all pin combinations are usable on all
+ platforms - platforms other then Compute Modules can only use this
+ to disable transaction combining.
+-Load: dtoverlay=i2c0-bcm2708,<param>=<val>
+-Params: sda0_pin GPIO pin for SDA0 (deprecated - use pins_*)
+- scl0_pin GPIO pin for SCL0 (deprecated - use pins_*)
+- pins_0_1 Use pins 0 and 1 (default)
++Load: dtoverlay=i2c0,<param>=<val>
++Params: pins_0_1 Use pins 0 and 1 (default)
+ pins_28_29 Use pins 28 and 29
+ pins_44_45 Use pins 44 and 45
+ pins_46_47 Use pins 46 and 47
+@@ -1166,18 +1164,33 @@ Params: sda0_pin GPIO pin
+ "yes")
+
+
+-Name: i2c1-bcm2708
++Name: i2c0-bcm2708
++Info: Deprecated, legacy version of i2c0, from which it inherits its
++ parameters, just adding the explicit individual pin specifiers.
++Load: <Deprecated>
++Params: sda0_pin GPIO pin for SDA0 (deprecated - use pins_*)
++ scl0_pin GPIO pin for SCL0 (deprecated - use pins_*)
++
++
++Name: i2c1
+ Info: Change i2c1 pin usage. Not all pin combinations are usable on all
+ platforms - platforms other then Compute Modules can only use this
+ to disable transaction combining.
+-Info: Enable the i2c_bcm2708 driver for the i2c1 bus
+-Load: dtoverlay=i2c1-bcm2708,<param>=<val>
++Load: dtoverlay=i2c1,<param>=<val>
++Params: pins_2_3 Use pins 2 and 3 (default)
++ pins_44_45 Use pins 44 and 45
++ combine Allow transactions to be combined (default
++ "yes")
++
++
++Name: i2c1-bcm2708
++Info: Deprecated, legacy version of i2c1, from which it inherits its
++ parameters, just adding the explicit individual pin specifiers.
++Load: <Deprecated>
+ Params: sda1_pin GPIO pin for SDA1 (2 or 44 - default 2)
+ scl1_pin GPIO pin for SCL1 (3 or 45 - default 3)
+ pin_func Alternative pin function (4 (alt0), 6 (alt2) -
+ default 4)
+- combine Allow transactions to be combined (default
+- "yes")
+
+
+ Name: i2c3
+--- a/arch/arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts
++++ b/arch/arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts
+@@ -1,69 +1,14 @@
+-/*
+- * Device tree overlay for i2c_bcm2708, i2c0 bus
+- *
+- * Compile:
+- * dtc -@ -I dts -O dtb -o i2c0-bcm2708-overlay.dtb i2c0-bcm2708-overlay.dts
+- */
+-
+-/dts-v1/;
+-/plugin/;
++#include "i2c0-overlay.dts"
+
+ /{
+- compatible = "brcm,bcm2835";
+-
+- fragment@0 {
+- target = <&i2c0>;
+- __overlay__ {
+- status = "okay";
+- };
+- };
+-
+- fragment@1 {
+- target = <&i2c0_pins>;
+- frag1: __overlay__ {
+- brcm,pins = <0 1>;
+- brcm,function = <4>; /* alt0 */
+- };
+- };
+-
+- fragment@2 {
+- target = <&i2c0_pins>;
+- __dormant__ {
+- brcm,pins = <28 29>;
+- brcm,function = <4>; /* alt0 */
+- };
+- };
+-
+- fragment@3 {
+- target = <&i2c0_pins>;
+- __dormant__ {
+- brcm,pins = <44 45>;
+- brcm,function = <5>; /* alt1 */
+- };
+- };
+-
+- fragment@4 {
+- target = <&i2c0_pins>;
+- __dormant__ {
+- brcm,pins = <46 47>;
+- brcm,function = <4>; /* alt0 */
+- };
+- };
+-
+- fragment@5 {
+- target = <&i2c0>;
+- __dormant__ {
+- compatible = "brcm,bcm2708-i2c";
+- };
+- };
+-
+- __overrides__ {
+- sda0_pin = <&frag1>,"brcm,pins:0";
+- scl0_pin = <&frag1>,"brcm,pins:4";
+- pins_0_1 = <0>,"+1-2-3-4";
+- pins_28_29 = <0>,"-1+2-3-4";
+- pins_44_45 = <0>,"-1-2+3-4";
+- pins_46_47 = <0>,"-1-2-3+4";
+- combine = <0>, "!5";
+- };
++ __overrides__ {
++ sda0_pin = <&pins1>,"brcm,pins:0",
++ <&pins2>,"brcm,pins:0",
++ <&pins3>,"brcm,pins:0",
++ <&pins4>,"brcm,pins:0";
++ scl0_pin = <&pins1>,"brcm,pins:4",
++ <&pins2>,"brcm,pins:4",
++ <&pins3>,"brcm,pins:4",
++ <&pins4>,"brcm,pins:4";
++ };
+ };
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/i2c0-overlay.dts
+@@ -0,0 +1,61 @@
++/dts-v1/;
++/plugin/;
++
++/{
++ compatible = "brcm,bcm2835";
++
++ fragment@0 {
++ target = <&i2c0>;
++ __overlay__ {
++ status = "okay";
++ pinctrl-0 = <&i2c0_pins>;
++ };
++ };
++
++ fragment@1 {
++ target = <&i2c0_pins>;
++ pins1: __overlay__ {
++ brcm,pins = <0 1>;
++ brcm,function = <4>; /* alt0 */
++ };
++ };
++
++ fragment@2 {
++ target = <&i2c0_pins>;
++ pins2: __dormant__ {
++ brcm,pins = <28 29>;
++ brcm,function = <4>; /* alt0 */
++ };
++ };
++
++ fragment@3 {
++ target = <&i2c0_pins>;
++ pins3: __dormant__ {
++ brcm,pins = <44 45>;
++ brcm,function = <5>; /* alt1 */
++ };
++ };
++
++ fragment@4 {
++ target = <&i2c0_pins>;
++ pins4: __dormant__ {
++ brcm,pins = <46 47>;
++ brcm,function = <4>; /* alt0 */
++ };
++ };
++
++ fragment@5 {
++ target = <&i2c0>;
++ __dormant__ {
++ compatible = "brcm,bcm2708-i2c";
++ };
++ };
++
++ __overrides__ {
++ pins_0_1 = <0>,"+1-2-3-4";
++ pins_28_29 = <0>,"-1+2-3-4";
++ pins_44_45 = <0>,"-1-2+3-4";
++ pins_46_47 = <0>,"-1-2-3+4";
++ combine = <0>, "!5";
++ };
++};
+--- a/arch/arm/boot/dts/overlays/i2c1-bcm2708-overlay.dts
++++ b/arch/arm/boot/dts/overlays/i2c1-bcm2708-overlay.dts
+@@ -1,43 +1,9 @@
+-/*
+- * Device tree overlay for i2c_bcm2708, i2c1 bus
+- *
+- * Compile:
+- * dtc -@ -I dts -O dtb -o i2c1-bcm2708-overlay.dtb i2c1-bcm2708-overlay.dts
+- */
+-
+-/dts-v1/;
+-/plugin/;
++#include "i2c1-overlay.dts"
+
+ /{
+- compatible = "brcm,bcm2835";
+-
+- fragment@0 {
+- target = <&i2c1>;
+- __overlay__ {
+- pinctrl-0 = <&i2c1_pins>;
+- status = "okay";
+- };
+- };
+-
+- fragment@1 {
+- target = <&i2c1_pins>;
+- pins: __overlay__ {
+- brcm,pins = <2 3>;
+- brcm,function = <4>; /* alt 0 */
+- };
+- };
+-
+- fragment@2 {
+- target = <&i2c1>;
+- __dormant__ {
+- compatible = "brcm,bcm2708-i2c";
+- };
+- };
+-
+- __overrides__ {
+- sda1_pin = <&pins>,"brcm,pins:0";
+- scl1_pin = <&pins>,"brcm,pins:4";
+- pin_func = <&pins>,"brcm,function:0";
+- combine = <0>, "!2";
+- };
++ __overrides__ {
++ sda1_pin = <&pins1>,"brcm,pins:0", <&pins2>,"brcm,pins:0";
++ scl1_pin = <&pins1>,"brcm,pins:4", <&pins1>,"brcm,pins:4";
++ pin_func = <&pins1>,"brcm,function:0", <&pins2>,"brcm,function:0";
++ };
+ };
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/i2c1-overlay.dts
+@@ -0,0 +1,44 @@
++/dts-v1/;
++/plugin/;
++
++/{
++ compatible = "brcm,bcm2835";
++
++ fragment@0 {
++ target = <&i2c1>;
++ __overlay__ {
++ status = "okay";
++ pinctrl-names = "default";
++ pinctrl-0 = <&i2c1_pins>;
++ };
++ };
++
++ fragment@1 {
++ target = <&i2c1_pins>;
++ pins1: __overlay__ {
++ brcm,pins = <2 3>;
++ brcm,function = <4>; /* alt 0 */
++ };
++ };
++
++ fragment@2 {
++ target = <&i2c1_pins>;
++ pins2: __dormant__ {
++ brcm,pins = <44 45>;
++ brcm,function = <6>; /* alt 2 */
++ };
++ };
++
++ fragment@3 {
++ target = <&i2c1>;
++ __dormant__ {
++ compatible = "brcm,bcm2708-i2c";
++ };
++ };
++
++ __overrides__ {
++ pins_2_3 = <0>,"=1!2";
++ pins_44_45 = <0>,"!1=2";
++ combine = <0>, "!3";
++ };
++};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 04:06:42 +0000