From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Trent Piepho <tpiepho-cgc2CodaaHDQT0dZR+AlfA@public.gmane.org>
Cc: "jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"mark.rutland-5wv7dgnIgG8@public.gmane.org"
<mark.rutland-5wv7dgnIgG8@public.gmane.org>,
"ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org"
<ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
"masami.hiramatsu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org"
<masami.hiramatsu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"jaswinder.singh-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org"
<jaswinder.singh-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCHv2 1/3] dt-bindings: spi: Add DT bindings for Synquacer
Date: Wed, 17 Jan 2018 11:18:18 +0000 [thread overview]
Message-ID: <20180117111817.GA9775@sirena.org.uk> (raw)
In-Reply-To: <1516132926.25398.98.camel-cgc2CodaaHDQT0dZR+AlfA@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 795 bytes --]
On Tue, Jan 16, 2018 at 08:02:06PM +0000, Trent Piepho wrote:
> On Tue, 2018-01-16 at 08:59 +0530, Jassi Brar wrote:
> > Now the idea dawns that DT provide both clocks and the driver select
> > from the mux looking at speed requirements of the slave at runtime.
> add this feature at some point. It might be simpler to just prefer
> HCLK if both are there. The idea being that the DT should describe the
> hardware rather than tell the driver what to do.
Or only try one if the other fails to give something.
> Speed can be changed on a xfer by xfer basis on a single message to a
> single slave. Trying to switch clocks during a message, if it requires
> resetting the whole block, sounds rather difficult.
In practice that's so vanishingly rare it's probably not worth worrying
about.
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
next prev parent reply other threads:[~2018-01-17 11:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-15 13:05 [PATCHv2 0/3] spi: support for Socionext Synquacer platform jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w
[not found] ` <1516021530-19236-1-git-send-email-jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2018-01-15 13:05 ` [PATCHv2 1/3] dt-bindings: spi: Add DT bindings for Synquacer jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w
[not found] ` <1516021559-19327-1-git-send-email-jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2018-01-15 15:15 ` Rob Herring
[not found] ` <CAL_JsqKM2OhdhFZfd_fhBkYiFE9Fdr38Xn7TKorwJo_-+f9xUg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-15 15:53 ` Jassi Brar
[not found] ` <CABb+yY3HEX6qMWxmirMnbwe3P5NwmUHGcuYypo-UzbUyUOi5UQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-15 17:17 ` Rob Herring
[not found] ` <CAL_JsqK16GXU0WQ2Ft2-_dHOH_y08inMjF8vHE4mhK0Zo9=JMg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-16 3:29 ` Jassi Brar
[not found] ` <CABb+yY1f=NwB_UmGAogTj2AgA5stk5zic39HJgTSJcv1rdcQVw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-16 20:02 ` Trent Piepho
[not found] ` <1516132926.25398.98.camel-cgc2CodaaHDQT0dZR+AlfA@public.gmane.org>
2018-01-17 11:18 ` Mark Brown [this message]
2018-01-17 10:00 ` Jassi Brar
2018-01-15 13:06 ` [PATCHv2 2/3] spi: Add spi driver for Socionext Synquacer platform jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w
2018-01-15 13:06 ` [PATCHv2 3/3] MAINTAINERS: Add entry for Synquacer SPI driver jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180117111817.GA9775@sirena.org.uk \
--to=broonie-dgejt+ai2ygdnm+yrofe0a@public.gmane.org \
--cc=ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
--cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=jaswinder.singh-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
--cc=linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=mark.rutland-5wv7dgnIgG8@public.gmane.org \
--cc=masami.hiramatsu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
--cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=tpiepho-cgc2CodaaHDQT0dZR+AlfA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).