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[PATCH] hpet: allow HPET FIXED_MEM32 resource type

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Allow the ACPI HPET description table to use a resource type of FIXED_MEM32
for the HPET reource.  Use the fixed resoure size of 1 KB for the HPET
resource as per the HPET spec.

Signed-off-by: Randy Dunlap <randy_d_dunlap@linux.intel.com>
Acked-by: Bob Picco <bob.picco@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Randy Dunlap 2005-10-30 15:03:42 -08:00 • committed by Linus Torvalds
parent 318db8f03b
commit 757c472409
1 changed files with 17 additions and 0 deletions
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17
drivers/char/hpet.c
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@ -49,6 +49,8 @@
#define HPET_USER_FREQ (64) #define HPET_USER_FREQ (64)
#define HPET_DRIFT (500) #define HPET_DRIFT (500)
#define HPET_RANGE_SIZE 1024 /* from HPET spec */
static u32 hpet_nhpet, hpet_max_freq = HPET_USER_FREQ; static u32 hpet_nhpet, hpet_max_freq = HPET_USER_FREQ;
/* A lock for concurrent access by app and isr hpet activity. */ /* A lock for concurrent access by app and isr hpet activity. */
@ -922,6 +924,21 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next) for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
if (hpetp->hp_hpet == hdp->hd_address) if (hpetp->hp_hpet == hdp->hd_address)
return -EBUSY; return -EBUSY;
} else if (res->id == ACPI_RSTYPE_FIXED_MEM32) {
struct acpi_resource_fixed_mem32 *fixmem32;
fixmem32 = &res->data.fixed_memory32;
if (!fixmem32)
return -EINVAL;
hdp->hd_phys_address = fixmem32->range_base_address;
hdp->hd_address = ioremap(fixmem32->range_base_address,
HPET_RANGE_SIZE);
for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
if (hpetp->hp_hpet == hdp->hd_address) {
return -EBUSY;
}
} else if (res->id == ACPI_RSTYPE_EXT_IRQ) { } else if (res->id == ACPI_RSTYPE_EXT_IRQ) {
struct acpi_resource_ext_irq *irqp; struct acpi_resource_ext_irq *irqp;
int i; int i;