From: broonie@kernel.org (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/5] spi: do not fail if the CS line is not connected
Date: Fri, 17 Jun 2016 11:47:25 +0100 [thread overview]
Message-ID: <20160617104725.GC26099@sirena.org.uk> (raw)
In-Reply-To: <1466150245-2648-2-git-send-email-andi.shyti@samsung.com>
On Fri, Jun 17, 2016 at 04:57:21PM +0900, Andi Shyti wrote:
> Some SPI connected devices do not have any CS line connected as
> some devices are alway enabled. Indeed, until now, a common
> workaround was to assign to num_chipselect a -1 value or 255
> (num_chipselect is unsigned).
>
> In this case do not fail and defer to the SPI device drivers the
> responsibility to check whether the num-cs is '0'.
A SPI controller always has one chip seelct, it may not be controllable
but it's at least logically present.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 473 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20160617/ac3e4287/attachment.sig>
next prev parent reply other threads:[~2016-06-17 10:47 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 7:57 [PATCH 0/5] SPI CS line logical change and s3c64xx code rework Andi Shyti
2016-06-17 7:57 ` [PATCH 1/5] spi: do not fail if the CS line is not connected Andi Shyti
2016-06-17 10:47 ` Mark Brown [this message]
2016-06-17 11:36 ` Andi Shyti
2016-06-17 12:28 ` Mark Brown
2016-06-19 6:09 ` Andi Shyti
2016-06-26 12:48 ` Mark Brown
2016-06-27 10:57 ` Andi Shyti
2016-06-27 13:06 ` Mark Brown
2016-06-27 14:08 ` Andi Shyti
2016-06-17 7:57 ` [PATCH 2/5] spi: s3c64xx: group the CS signalling writes in a single function Andi Shyti
2016-06-30 12:15 ` Applied "spi: s3c64xx: group the CS signalling writes in a single function" to the spi tree Mark Brown
2016-06-17 7:57 ` [PATCH 3/5] spi: s3c64xx: consider the case where the CS line is not connected Andi Shyti
2016-06-17 7:57 ` [PATCH 4/5] spi: s3c64xx: do not configure the device twice Andi Shyti
2016-06-30 12:15 ` Applied "spi: s3c64xx: do not configure the device twice" to the spi tree Mark Brown
2016-06-17 7:57 ` [PATCH 5/5] spi: s3c63xx: simplify if statement in prepare_transfer function Andi Shyti
2016-06-30 12:15 ` Applied "spi: s3c64xx: simplify if statement in prepare_transfer function" to the spi tree Mark Brown
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=20160617104725.GC26099@sirena.org.uk \
--to=broonie@kernel.org \
--cc=linux-arm-kernel@lists.infradead.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