mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
70 lines
2.0 KiB
Diff
70 lines
2.0 KiB
Diff
From 0583a0c3f173c327dff70ee9d7a0d70e50b5d120 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Fri, 1 Jul 2016 22:34:52 +0100
|
|
Subject: [PATCH] BCM270X_DT: Overlay to re-enable HW CS on SPI0
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/1547
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
arch/arm/boot/dts/overlays/Makefile | 1 +
|
|
arch/arm/boot/dts/overlays/README | 6 ++++++
|
|
arch/arm/boot/dts/overlays/spi0-hw-cs-overlay.dts | 26 +++++++++++++++++++++++
|
|
3 files changed, 33 insertions(+)
|
|
create mode 100644 arch/arm/boot/dts/overlays/spi0-hw-cs-overlay.dts
|
|
|
|
--- a/arch/arm/boot/dts/overlays/Makefile
|
|
+++ b/arch/arm/boot/dts/overlays/Makefile
|
|
@@ -81,6 +81,7 @@ 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-$(RPI_DT_OVERLAYS) += spi0-hw-cs.dtbo
|
|
dtbo-$(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
|
|
@@ -1006,6 +1006,12 @@ Load: dtoverlay=spi-rtc,<param>=<val>
|
|
Params: pcf2123 Select the PCF2123 device
|
|
|
|
|
|
+Name: spi0-hw-cs
|
|
+Info: Re-enables hardware CS/CE (chip selects) for SPI0
|
|
+Load: dtoverlay=spi0-hw-cs
|
|
+Params: <None>
|
|
+
|
|
+
|
|
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/spi0-hw-cs-overlay.dts
|
|
@@ -0,0 +1,26 @@
|
|
+/*
|
|
+ * Device tree overlay to re-enable hardware CS for SPI0
|
|
+ */
|
|
+
|
|
+/dts-v1/;
|
|
+/plugin/;
|
|
+
|
|
+/ {
|
|
+ compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709";
|
|
+
|
|
+ fragment@0 {
|
|
+ target = <&spi0>;
|
|
+ __overlay__ {
|
|
+ cs-gpios = <0>, <0>;
|
|
+ status = "okay";
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@1 {
|
|
+ target = <&spi0_cs_pins>;
|
|
+ __overlay__ {
|
|
+ brcm,pins = <8 7>;
|
|
+ brcm,function = <4>; /* alt0 */
|
|
+ };
|
|
+ };
|
|
+};
|