[PATCH v3 03/15] at91: dt: sam9261: Basic Device Tree support for the at91sam9261ek
From: Jean-Christophe PLAGNIOL-VILLARD <hidden>
Date: 2014-02-07 08:30:07
On 16:57 Thu 23 Jan , Jean-Jacques Hiblot wrote:
quoted hunk ↗ jump to hunk
This patch implements a simple DTS to boot a at91sam9261ek with a dt-enabled kernel (at91_dt_defconfig). Only dbgu, nand and watchdog are described in the DT. Signed-off-by: Jean-Jacques Hiblot <redacted> --- arch/arm/boot/dts/Makefile | 2 + arch/arm/boot/dts/at91sam9261ek.dts | 112 ++++++++++++++++++++++++++++++++++++ 2 files changed, 114 insertions(+) create mode 100644 arch/arm/boot/dts/at91sam9261ek.dtsdiff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index 772a30e..ece523d 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile@@ -11,6 +11,8 @@ dtb-$(CONFIG_ARCH_AT91) += ethernut5.dtb dtb-$(CONFIG_ARCH_AT91) += evk-pro3.dtb dtb-$(CONFIG_ARCH_AT91) += tny_a9260.dtb dtb-$(CONFIG_ARCH_AT91) += usb_a9260.dtb +# sam9261 +dtb-$(CONFIG_ARCH_AT91) += at91sam9261ek.dtb # sam9263 dtb-$(CONFIG_ARCH_AT91) += at91sam9263ek.dtb dtb-$(CONFIG_ARCH_AT91) += tny_a9263.dtbdiff --git a/arch/arm/boot/dts/at91sam9261ek.dts b/arch/arm/boot/dts/at91sam9261ek.dts new file mode 100644 index 0000000..8909217 --- /dev/null +++ b/arch/arm/boot/dts/at91sam9261ek.dts@@ -0,0 +1,112 @@ +/* + * at91sam9261ek.dts - Device Tree file for Atmel at91sam9261 reference board + * + * Copyright (C) 2013 Jean-Jacques Hiblot <jjhiblot@traphandler.com> + * + * Licensed under GPLv2 only. + */ +/dts-v1/; +#include "at91sam9261.dtsi" + +/ { + model = "Atmel at91sam9261ek"; + compatible = "atmel,at91sam9261ek", "atmel,at91sam9261", "atmel,at91sam9"; + + chosen { + bootargs = "mem=64M console=ttyS0,115200";
drop the mem=64M and use linux,stdout for the console
+ };
+
+ memory {
+ reg = <0x20000000 0x4000000>;
+ };
+
+ clocks {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ main_clock: clock at 0 {
+ compatible = "atmel,osc", "fixed-clock";
+ clock-frequency = <18432000>;
+ };
+ };
+
+ ahb {
+
+ nand0: nand at 40000000 {
+ nand-bus-width = <8>;
+ nand-ecc-mode = "soft";
+ nand-on-flash-bbt = <1>;it's a boolean just nand-on-flash-bbt;
+ status = "okay";
+
+ at91bootstrap at 0 {
+ label = "at91bootstrap";
+ reg = <0x0 0x40000>;
+ };
+
+ bootloader at 40000 {
+ label = "bootloader";
+ reg = <0x40000 0x80000>;
+ };
+
+ bootloaderenv at c0000 {
+ label = "bootloader env";
+ reg = <0xc0000 0xc0000>;
+ };
+
+ dtb at 180000 {
+ label = "device tree";
+ reg = <0x180000 0x80000>;
+ };
+
+ kernel at 200000 {
+ label = "kernel";
+ reg = <0x200000 0x600000>;
+ };
+
+ rootfs at 800000 {
+ label = "rootfs";
+ reg = <0x800000 0x0f800000>;
+ };we really need to switch to UBI
+ };
+
+ apb {
+ dbgu: serial at fffff200 {
+ status = "okay";
+ };
+
+ pinctrl at fffff400 {
+ leds {
+ pinctrl_leds: leds-0 {
+ atmel,pins = <AT91_PIOA 13 AT91_PERIPH_GPIO AT91_PINCTRL_NONE
+ AT91_PIOA 14 AT91_PERIPH_GPIO AT91_PINCTRL_NONE
+ AT91_PIOA 23 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
+ };
+ };
+ };no need this drop it you need to only describe the GPIO if you have specific pinctrl property such as pull up & co
+
+ watchdog at fffffd40 {
+ status = "okay";
+ };
+ };
+ };
+
+ leds {
+ compatible = "gpio-leds";
+ ds8 {
+ label = "ds8";
+ gpios = <&pioA 13 GPIO_ACTIVE_LOW>;
+ linux,default-trigger = "none";
+ };
+ ds7 {
+ label = "ds7";
+ gpios = <&pioA 14 GPIO_ACTIVE_LOW>;
+ linux,default-trigger = "nand-disk";
+ };
+ ds1 {
+ label = "ds1";
+ gpios = <&pioA 23 GPIO_ACTIVE_LOW>;
+ linux,default-trigger = "heartbeat";
+ };
+ };
+};
--
1.8.5.2