patchbot at xen
Aug 8, 2013, 10:23 PM
Post #1 of 1
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[xen master] xen/arm: Add support for device tree specified arch_timer clock frequency.
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commit dd11cc89c5ba53ae8d969037eda8b8c70d20ffa6
Author: Chen Baozi <baozich [at] gmail>
AuthorDate: Thu Aug 8 18:52:24 2013 +0800
Commit: Ian Campbell <ian.campbell [at] citrix>
CommitDate: Thu Aug 8 12:43:19 2013 +0100
xen/arm: Add support for device tree specified arch_timer clock frequency.
Signed-off-by: Chen Baozi <baozich [at] gmail>
Acked-by: Ian Campbell <ian.campbell [at] citrix>
---
xen/arch/arm/time.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/xen/arch/arm/time.c b/xen/arch/arm/time.c
index 4ed7882..9a1b080 100644
--- a/xen/arch/arm/time.c
+++ b/xen/arch/arm/time.c
@@ -104,6 +104,7 @@ int __init init_xen_time(void)
struct dt_device_node *dev;
int res;
unsigned int i;
+ u32 rate;
dev = dt_find_compatible_node(NULL, NULL, "arm,armv7-timer");
if ( !dev )
@@ -134,7 +135,11 @@ int __init init_xen_time(void)
if ( !cpu_has_gentimer )
panic("CPU does not support the Generic Timer v1 interface.\n");
- cpu_khz = READ_SYSREG32(CNTFRQ_EL0) / 1000;
+ res = dt_property_read_u32(dev, "clock-frequency", &rate);
+ if ( res )
+ cpu_khz = rate / 1000;
+ else
+ cpu_khz = READ_SYSREG32(CNTFRQ_EL0) / 1000;
boot_count = READ_SYSREG64(CNTPCT_EL0);
printk("Using generic timer at %lu KHz\n", cpu_khz);
--
generated by git-patchbot for /home/xen/git/xen.git#master
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