From ffb9fc68dff38f811eeb24c15aba0418b6a8ee53 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Tue, 22 Feb 2011 21:07:41 +0100 Subject: [PATCH] x86: dtb: Add device tree support for HPET Set hpet_address based on information provied form DTB Signed-off-by: Sebastian Andrzej Siewior Acked-by: Grant Likely Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org Cc: Dirk Brandewie LKML-Reference: <1298405266-1624-7-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner --- arch/x86/kernel/devicetree.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c index 2739d5613a38..dbb3bda40af9 100644 --- a/arch/x86/kernel/devicetree.c +++ b/arch/x86/kernel/devicetree.c @@ -11,6 +11,7 @@ #include #include +#include #include #include @@ -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(); } -- 2.34.1