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authorLinus Walleij <linus.walleij@linaro.org>2015-05-14 07:46:40 (GMT)
committerLinus Walleij <linus.walleij@linaro.org>2015-05-18 13:06:40 (GMT)
commit58202033faca18198af21dabb7e75481d4a2cd8a (patch)
treeabf3cc5d1b6c239ae71c2c6e23f5e41ac66e4fd6 /arch/arm/mach-ux500
parent80757f2335c93fbb9a8fa5a2e68f8ef46d2d5081 (diff)
downloadlinux-58202033faca18198af21dabb7e75481d4a2cd8a.tar.xz
ARM: ux500: get SCU base from device tree
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>
Diffstat (limited to 'arch/arm/mach-ux500')
-rw-r--r--arch/arm/mach-ux500/platsmp.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c
index 1e13d0a..62b1de9 100644
--- a/arch/arm/mach-ux500/platsmp.c
+++ b/arch/arm/mach-ux500/platsmp.c
@@ -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);