From: Chuanhong Guo <gch981213-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH resend 1/2] spi: add driver for ar934x spi controller
Date: Thu, 6 Feb 2020 20:33:33 +0800 [thread overview]
Message-ID: <CAJsYDV+C+-uqurM+yTS3XXXrEDe+G3XFrpYEAaZLvzECLNoF+A@mail.gmail.com> (raw)
In-Reply-To: <CAJsYDVKnOv+4NT8V+9fFy_0KE7QSoeTL0jHTdq31Z=88vBzHgQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Thu, Feb 6, 2020 at 8:30 PM Chuanhong Guo <gch981213-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > It looks like this could just be a transfer_one() operation
> > instead of transfer_one_message() (which is what this is in spite
> > of the name)? There's nothing custom outside this loop that I
> > can see.
>
> Chipselect is also handled during transfer. Controller asserts
> corresponding chipselect in SHIFT_CTRL register, and if SHIFT_TERM bit
> is set, controller will deassert chipselect after current transfer is
> done. I need to know whether this is the last transfer and set
> SHIFT_TERM accordingly.
Oh, I remembered that I saw transfer_one function name somewhere and
thought maybe I could shorten the function name a bit. I'll correct
this back to ar934x_spi_transfer_one_message in v2.
Regards,
Chuanhong Guo
next prev parent reply other threads:[~2020-02-06 12:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-06 8:44 [PATCH resend 0/2] spi: add driver for ar934x spi controller Chuanhong Guo
2020-02-06 8:44 ` [PATCH resend 1/2] " Chuanhong Guo
[not found] ` <20200206084443.209719-2-gch981213-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-02-06 11:31 ` Mark Brown
[not found] ` <20200206113158.GK3897-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2020-02-06 12:30 ` Chuanhong Guo
[not found] ` <CAJsYDVKnOv+4NT8V+9fFy_0KE7QSoeTL0jHTdq31Z=88vBzHgQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-02-06 12:33 ` Chuanhong Guo [this message]
[not found] ` <CAJsYDV+C+-uqurM+yTS3XXXrEDe+G3XFrpYEAaZLvzECLNoF+A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-02-06 13:54 ` Mark Brown
[not found] ` <20200206084443.209719-1-gch981213-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-02-06 8:44 ` [PATCH resend 2/2] dt-binding: spi: add bindings for spi-ar934x Chuanhong Guo
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=CAJsYDV+C+-uqurM+yTS3XXXrEDe+G3XFrpYEAaZLvzECLNoF+A@mail.gmail.com \
--to=gch981213-re5jqeeqqe8avxtiumwx3w@public.gmane.org \
--cc=broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=mark.rutland-5wv7dgnIgG8@public.gmane.org \
--cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@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).