From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: [PATCH v5 4/5] xen/arm: Add support for device tree specified arch_timer clock frequency. Date: Thu, 8 Aug 2013 13:18:34 +0100 Message-ID: <1375964314.970.97.camel@kazak.uk.xensource.com> References: <1375959145-13709-1-git-send-email-baozich@gmail.com> <1375959145-13709-5-git-send-email-baozich@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1375959145-13709-5-git-send-email-baozich@gmail.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Chen Baozi Cc: Julien Grall , Andrii Anisov , Xen Developer List List-Id: xen-devel@lists.xenproject.org On Thu, 2013-08-08 at 18:52 +0800, Chen Baozi wrote: > Signed-off-by: Chen Baozi Acked + applied, thanks, > --- > xen/arch/arm/time.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > 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);