[lkml]   [2019]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRE: [PATCH 1/2] clk: imx: pll14xx: use writel_relaxed
Hi Daniel,

> Subject: Re: [PATCH 1/2] clk: imx: pll14xx: use writel_relaxed
> On Wed, 2019-11-13 at 07:24 +0000, Peng Fan wrote:
> > From: Peng Fan <>
> >
> > It not make sense to use writel, use relaxed variant.
> >
> Hi Peng,
> Please explain why this change is needed.

writel has a barrier, however that barrier is not needed,
because device memory access is in order and clk driver
has spin_lock or other lock to make sure write finished.

I would hear more comments before I post V2 about
the change and other similar patches to switch to
use relaxed API.

 \ /
  Last update: 2019-11-13 13:16    [W:0.095 / U:3.516 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site