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| author | Randy Dunlap <randy_d_dunlap@linux.intel.com> | 2005-10-30 15:03:42 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-30 17:37:31 -0800 |
| commit | 757c4724099a31a61754ea5202802eaa1def851c (patch) | |
| tree | 19e8d379a50d96f80fc179dc4567449de1eed623 /drivers/char | |
| parent | 318db8f03bc06e6de98e98a568b6b2fa64233b87 (diff) | |
| download | linux-stable-757c4724099a31a61754ea5202802eaa1def851c.tar.gz linux-stable-757c4724099a31a61754ea5202802eaa1def851c.tar.bz2 linux-stable-757c4724099a31a61754ea5202802eaa1def851c.zip | |
[PATCH] hpet: allow HPET FIXED_MEM32 resource type
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>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hpet.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index 0159c463f0f9..e605259e3753 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -49,6 +49,8 @@ #define HPET_USER_FREQ (64) #define HPET_DRIFT (500) +#define HPET_RANGE_SIZE 1024 /* from HPET spec */ + static u32 hpet_nhpet, hpet_max_freq = HPET_USER_FREQ; /* 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) if (hpetp->hp_hpet == hdp->hd_address) 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) { struct acpi_resource_ext_irq *irqp; int i; |