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ARM: ux500: Initial Device Tree support for Snowball 

This provides very basic Device Tree support for ST-Ericsson's
low-cost development platform, Snowball. If Device Tree for
ux500 is enabled and the correct board is configured within the
Device Tree blob, the correct *_init_machine() will be called.

This patch is based on some original work completed by:
  Niklas Hernaeus <niklas.hernaeus@linaro.org>

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Niklas Hernaeus <niklas.hernaeus@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2012-03-07 15:04:07 +00:00
parent e27fc6cf84
commit 2d334297c6
3 changed files with 66 additions and 0 deletions
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31
arch/arm/boot/dts/snowball.dts Normal file
View File

@ -0,0 +1,31 @@
/*
* Copyright 2011 ST-Ericsson AB
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/dts-v1/;
/ {
model = "Calao Systems Snowball platform with device tree";
compatible = "calaosystems,snowball-a9500";
#address-cells = <1>;
#size-cells = <1>;
memory {
reg = <0x00000000 0x20000000>;
};
soc-u9500 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
ranges;
};
};

1
arch/arm/mach-ux500/Makefile.boot
View File

@ -2,3 +2,4 @@
params_phys-y := 0x00000100
initrd_phys-y := 0x00800000
dtb-$(CONFIG_MACH_SNOWBALL) += snowball.dtb

34
arch/arm/mach-ux500/board-mop500.c
View File

@ -30,6 +30,9 @@
#include <linux/gpio_keys.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/leds.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@ -738,3 +741,34 @@ MACHINE_START(SNOWBALL, "Calao Systems Snowball platform")
.handle_irq = gic_handle_irq,
.init_machine = snowball_init_machine,
MACHINE_END
#ifdef CONFIG_MACH_UX500_DT
static void __init u8500_init_machine(void)
{
if (of_machine_is_compatible("calaosystems,snowball-a9500"))
return snowball_init_machine();
else if (of_machine_is_compatible("st-ericsson,hrefv60+"))
return hrefv60_init_machine();
else if (of_machine_is_compatible("st-ericsson,mop500"))
return mop500_init_machine();
}
static const char * u8500_dt_board_compat[] = {
"calaosystems,snowball-a9500",
"st-ericsson,hrefv60+",
"st-ericsson,u8500",
"st-ericsson,mop500",
NULL,
};
DT_MACHINE_START(U8500_DT, "ST-Ericsson U8500 platform (Device Tree Support)")
.map_io = u8500_map_io,
.init_irq = ux500_init_irq,
/* we re-use nomadik timer here */
.timer = &ux500_timer,
.handle_irq = gic_handle_irq,
.init_machine = u8500_init_machine,
.dt_compat = u8500_dt_board_compat,
MACHINE_END
#endif