aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm2708/patches-4.4/0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch76
1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch b/target/linux/brcm2708/patches-4.4/0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch
new file mode 100644
index 0000000000..1b53b9a90b
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch
@@ -0,0 +1,76 @@
+From 6790d3a4683d7e2e6e0fe1bbc7ab856f23e37885 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";
++ };
++};