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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2011-02-22 21:07:41 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-23 22:27:53 +0100 |
| commit | ffb9fc68dff38f811eeb24c15aba0418b6a8ee53 (patch) | |
| tree | 6292fde3f85656584c4a96d53b9f3f2ac7d91c0a /arch/x86/kernel/devicetree.c | |
| parent | x86: dtb: Add early parsing of IO_APIC (diff) | |
| download | linux-ffb9fc68dff38f811eeb24c15aba0418b6a8ee53.tar.xz linux-ffb9fc68dff38f811eeb24c15aba0418b6a8ee53.zip | |
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.c | 19 |
1 files changed, 19 insertions, 0 deletions
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 <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(); } |