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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2011-02-22 21:07:41 +0100
committerThomas Gleixner <tglx@linutronix.de>2011-02-23 22:27:53 +0100
commitffb9fc68dff38f811eeb24c15aba0418b6a8ee53 (patch)
tree6292fde3f85656584c4a96d53b9f3f2ac7d91c0a /arch/x86/kernel/devicetree.c
parent3879a6f32948330782889cebc4d74c4f2316c676 (diff)
x86: dtb: Add device tree support for HPET
Set hpet_address based on information provied form DTB Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org Cc: Dirk Brandewie <dirk.brandewie@gmail.com> LKML-Reference: <1298405266-1624-7-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/devicetree.c')
-rw-r--r--arch/x86/kernel/devicetree.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 2739d5613a3..dbb3bda40af 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -11,6 +11,7 @@
#include <linux/of_platform.h>
#include <linux/slab.h>
+#include <asm/hpet.h>
#include <asm/irq_controller.h>
#include <asm/apic.h>
@@ -98,6 +99,23 @@ void __init add_dtb(u64 data)
initial_dtb = data + offsetof(struct setup_data, data);
}
+static void __init dtb_setup_hpet(void)
+{
+ struct device_node *dn;
+ struct resource r;
+ int ret;
+
+ dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
+ if (!dn)
+ return;
+ ret = of_address_to_resource(dn, 0, &r);
+ if (ret) {
+ WARN_ON(1);
+ return;
+ }
+ hpet_address = r.start;
+}
+
static void __init dtb_lapic_setup(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
@@ -197,5 +215,6 @@ void __init x86_dtb_get_config(unsigned int unused)
of_scan_flat_dt(early_init_dt_scan_root, NULL);
unflatten_device_tree();
+ dtb_setup_hpet();
dtb_apic_setup();
}