Set hpet_address based on information provied form DTB
Cc: [email protected]
Cc: Dirk Brandewie <[email protected]>
Acked-by: Grant Likely <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
---
arch/x86/kernel/devicetree.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 72cc3e2..8d7a2eb 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>
@@ -99,6 +100,23 @@ 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
@@ -199,5 +217,6 @@ 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();
}
--
1.7.4
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