From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: linux-acpi@vger.kernel.org
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Len Brown <lenb@kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH] ACPI: implement acpi_os_get_timer() according the spec
Date: Mon, 13 May 2013 13:27:51 +0300 [thread overview]
Message-ID: <1368440871-27552-1-git-send-email-mika.westerberg@linux.intel.com> (raw)
ACPI Timer() opcode should return monotonically increasing clock with 100ns
granularity. Implement this with the help of ktime_get().
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
drivers/acpi/osl.c | 14 +-------------
1 file changed, 1 insertion(+), 13 deletions(-)
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 586e7e9..2a22170 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -835,19 +835,7 @@ void acpi_os_stall(u32 us)
*/
u64 acpi_os_get_timer(void)
{
- static u64 t;
-
-#ifdef CONFIG_HPET
- /* TBD: use HPET if available */
-#endif
-
-#ifdef CONFIG_X86_PM_TIMER
- /* TBD: default to PM timer if HPET was not available */
-#endif
- if (!t)
- printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
-
- return ++t;
+ return ktime_to_ns(ktime_get()) / 100;
}
acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
--
1.7.10.4
next reply other threads:[~2013-05-13 10:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-13 10:27 Mika Westerberg [this message]
2013-05-13 11:38 ` [PATCH] ACPI: implement acpi_os_get_timer() according the spec Rafael J. Wysocki
2013-05-13 11:44 ` Mika Westerberg
2013-05-20 10:25 ` Mika Westerberg
2013-05-20 11:07 ` Rafael J. Wysocki
2013-05-20 11:28 ` [PATCH v2] " Mika Westerberg
2013-05-23 7:27 ` [PATCH v3] " Mika Westerberg
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