2b1c6b21b5
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Also adds support for Raspberry Pi Compute Module 3 (untested). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
76 lines
2.1 KiB
Diff
76 lines
2.1 KiB
Diff
From a008938ed54a702e72a8421776c1d3f97b79a97b Mon Sep 17 00:00:00 2001
|
|
From: Thomas Kriechbaumer <thomas@kriechbaumer.name>
|
|
Date: Fri, 3 Jun 2016 09:40:44 +0200
|
|
Subject: [PATCH] BCM270X_DT: Add spi-rtc overlay on SPI0.0
|
|
|
|
Initial version only supports PCF2123 RTC.
|
|
|
|
See: https://github.com/raspberrypi/linux/pull/1510
|
|
---
|
|
arch/arm/boot/dts/overlays/Makefile | 1 +
|
|
arch/arm/boot/dts/overlays/README | 6 +++++
|
|
arch/arm/boot/dts/overlays/spi-rtc-overlay.dts | 33 ++++++++++++++++++++++++++
|
|
3 files changed, 40 insertions(+)
|
|
create mode 100644 arch/arm/boot/dts/overlays/spi-rtc-overlay.dts
|
|
|
|
--- a/arch/arm/boot/dts/overlays/Makefile
|
|
+++ b/arch/arm/boot/dts/overlays/Makefile
|
|
@@ -78,6 +78,7 @@ dtbo-$(RPI_DT_OVERLAYS) += smi.dtbo
|
|
dtbo-$(RPI_DT_OVERLAYS) += smi-dev.dtbo
|
|
dtbo-$(RPI_DT_OVERLAYS) += smi-nand.dtbo
|
|
dtbo-$(RPI_DT_OVERLAYS) += spi-gpio35-39.dtbo
|
|
+dtbo-$(RPI_DT_OVERLAYS) += spi-rtc.dtbo
|
|
dtbo-$(RPI_DT_OVERLAYS) += spi1-1cs.dtbo
|
|
dtbo-$(RPI_DT_OVERLAYS) += spi1-2cs.dtbo
|
|
dtbo-$(RPI_DT_OVERLAYS) += spi1-3cs.dtbo
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -975,6 +975,12 @@ Load: dtoverlay=spi-gpio35-39
|
|
Params: <None>
|
|
|
|
|
|
+Name: spi-rtc
|
|
+Info: Adds support for a number of SPI Real Time Clock devices
|
|
+Load: dtoverlay=spi-rtc,<param>=<val>
|
|
+Params: pcf2123 Select the PCF2123 device
|
|
+
|
|
+
|
|
Name: spi1-1cs
|
|
Info: Enables spi1 with a single chip select (CS) line and associated spidev
|
|
dev node. The gpio pin number for the CS line and spidev device node
|
|
--- /dev/null
|
|
+++ b/arch/arm/boot/dts/overlays/spi-rtc-overlay.dts
|
|
@@ -0,0 +1,33 @@
|
|
+/dts-v1/;
|
|
+/plugin/;
|
|
+
|
|
+/ {
|
|
+ compatible = "brcm,bcm2708";
|
|
+
|
|
+ fragment@0 {
|
|
+ target = <&spidev0>;
|
|
+ __dormant__ {
|
|
+ status = "disabled";
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@1 {
|
|
+ target = <&spi0>;
|
|
+ __dormant__ {
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ status = "okay";
|
|
+
|
|
+ rtc-pcf2123@0 {
|
|
+ compatible = "nxp,rtc-pcf2123";
|
|
+ spi-max-frequency = <5000000>;
|
|
+ spi-cs-high = <1>;
|
|
+ reg = <0>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+
|
|
+ __overrides__ {
|
|
+ pcf2123 = <0>, "=0=1";
|
|
+ };
|
|
+};
|