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- 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";
- + };
- +};
|
