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openwrt/target/linux/bcm27xx/patches-4.19/950-0614-overlays-Add-i2c0-and-i2c1-for-regularity.patch
Adrian Schmutzler 7d7aa2fd92 brcm2708: rename target to bcm27xx 
This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-02-14 14:10:51 +01:00

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From 9c0f4b3e3b197d5c81f4bd6679f2c2456ab45c9e Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 17 Jul 2019 10:08:55 +0100
Subject: [PATCH] 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";
+ };
+};
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