From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: linux-wpan@vger.kernel.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>,
Alexander Aring <aar@pengutronix.de>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Chris Healy <cphealy@gmail.com>
Subject: [PATCH] at86rf230: Allow slow GPIO pins for "rstn"
Date: Sun, 18 Dec 2016 15:25:33 -0800 [thread overview]
Message-ID: <1482103533-13187-1-git-send-email-andrew.smirnov@gmail.com> (raw)
Driver code never touches "rstn" signal in atomic context, so there's
no need to implicitly put such restriction on it by using gpio_set_value
to manipulate it. Replace gpio_set_value to gpio_set_value_cansleep to
fix that.
As a an example of where such restriction might be inconvenient,
consider a hardware design where "rstn" is connected to a pin of I2C/SPI
GPIO expander chip.
Cc: Chris Healy <cphealy@gmail.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
drivers/net/ieee802154/at86rf230.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index 9f10da6..7700690 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -1710,9 +1710,9 @@ static int at86rf230_probe(struct spi_device *spi)
/* Reset */
if (gpio_is_valid(rstn)) {
udelay(1);
- gpio_set_value(rstn, 0);
+ gpio_set_value_cansleep(rstn, 0);
udelay(1);
- gpio_set_value(rstn, 1);
+ gpio_set_value_cansleep(rstn, 1);
usleep_range(120, 240);
}
--
2.5.5
next reply other threads:[~2016-12-18 23:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-18 23:25 Andrey Smirnov [this message]
2016-12-21 12:30 ` at86rf230: Allow slow GPIO pins for "rstn" Nikita Yushchenko
2016-12-21 13:11 ` [PATCH] " Stefan Schmidt
[not found] ` <CAFXsbZpgiTM2qngYERVpfXHvePW8M8DN91YnZwc-voKO=FDUUA@mail.gmail.com>
2016-12-21 21:01 ` Stefan Schmidt
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=1482103533-13187-1-git-send-email-andrew.smirnov@gmail.com \
--to=andrew.smirnov@gmail.com \
--cc=aar@pengutronix.de \
--cc=cphealy@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-wpan@vger.kernel.org \
--cc=netdev@vger.kernel.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).