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ARM: ux500: get SCU base from device tree

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The SMP startup/shutdown code relied on a static SCU base
address, let's get this from the device tree instead.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2015-05-14 09:46:40 +02:00
parent 80757f2335
commit 58202033fa
1 changed files with 8 additions and 1 deletions
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9
arch/arm/mach-ux500/platsmp.c
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@ -16,6 +16,8 @@
#include <linux/device.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
@ -122,8 +124,13 @@ static void __init wakeup_secondary(void)
static void __init ux500_smp_init_cpus(void)
{
unsigned int i, ncores;
struct device_node *np;
scu_base = ioremap(U8500_SCU_BASE, 0x100);
np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
scu_base = of_iomap(np, 0);
of_node_put(np);
if (!scu_base)
return;
backupram = ioremap(U8500_BACKUPRAM0_BASE, SZ_8K);
ncores = scu_get_core_count(scu_base);