ARM: ux500: remap BB offset dynamically
Instead of relying on static maps, remap the BB chip ID
offset dynamically.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/mach-ux500/cpu-db8500.c b/arch/arm/mach-ux500/cpu-db8500.c
index 391d329..0b3ebbf 100644
--- a/arch/arm/mach-ux500/cpu-db8500.c
+++ b/arch/arm/mach-ux500/cpu-db8500.c
@@ -104,14 +104,18 @@
static const char *db8500_read_soc_id(void)
{
- void __iomem *uid = __io_address(U8500_BB_UID_BASE);
+ void __iomem *uid;
+ uid = ioremap(U8500_BB_UID_BASE, 0x20);
+ if (!uid)
+ return NULL;
/* Throw these device-specific numbers into the entropy pool */
add_device_randomness(uid, 0x14);
return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
readl((u32 *)uid+0),
readl((u32 *)uid+1), readl((u32 *)uid+2),
readl((u32 *)uid+3), readl((u32 *)uid+4));
+ iounmap(uid);
}
static struct device * __init db8500_soc_device_init(void)