lkml.org 
[lkml]   [2016]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC 1/1] ARM: print MHz in /proc/cpuinfo
From
Date


On 07/06/16 22:08, Jon Mason wrote:
> Query the CPU core clock in the device tree to determine the core clock
> speed.

How do guarantee that it's the current frequency of the CPU ?
It doesn't even represent the mix or max frequency, so it's incorrect.
Some DTs have boot frequency in that entry.

> Output this clock rate in /proc/cpuinfo to match the output
> from other architectures. The output is intentionally patterned after
> the x86 output, to match existing (and possibly expected) convention.
>
> If any errors are encountered in querying the clock (or the speed is
> erroneously zero), nothing will be printed out. Thus any existing
> devices that do not have CPU clocks defined in the device tree will
> work as before.
>

What if they just don't have in DT but have DVFS support ?

Also whey do we need this support when the user-space can query the
CPUFreq sysfs which is more accurate and maintains the current running
frequency ?

--
Regards,
Sudeep

\
 
 \ /
  Last update: 2016-06-08 11:01    [W:0.107 / U:0.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site