diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0410-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0410-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0410-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch b/target/linux/brcm2708/patches-4.4/0410-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch new file mode 100644 index 0000000000..235879725a --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0410-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch @@ -0,0 +1,76 @@ +From ae24592f7b8e0af654a25d18a8d26cd0e5799fdb Mon Sep 17 00:00:00 2001 +From: Thomas Kriechbaumer <thomas@kriechbaumer.name> +Date: Fri, 3 Jun 2016 09:40:44 +0200 +Subject: [PATCH 410/423] 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"; ++ }; ++}; |