From: Quentin Schulz <quentin.schulz@free-electrons.com>
To: jdelvare@suse.com, linux@roeck-us.net, jic23@kernel.org,
knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net,
maxime.ripard@free-electrons.com, wens@csie.org,
lee.jones@linaro.org
Cc: Quentin Schulz <quentin.schulz@free-electrons.com>,
linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org,
linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
thomas.petazzoni@free-electrons.com,
antoine.tenart@free-electrons.com
Subject: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall
Date: Tue, 26 Jul 2016 09:43:44 +0200 [thread overview]
Message-ID: <1469519027-11387-2-git-send-email-quentin.schulz@free-electrons.com> (raw)
In-Reply-To: <1469519027-11387-1-git-send-email-quentin.schulz@free-electrons.com>
iio_channel_get_all returns -ENODEV when it cannot find either phandles and
properties in the Device Tree or channels whose consumer_dev_name matches
iio_hwmon in iio_map_list. The iio_map_list is filled in by iio drivers
which might be probed after iio_hwmon.
This makes sure iio_hwmon is probed after all iio drivers which provides
channels to iio_hwmon are probed, be they present in the DT or using
iio_map_list.
This replaces module_platform_driver() by an explicit code variant which
calls late_initcall() install of module_init(), meaning it probes after
all the drivers using module_init() as their init.
Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
---
v3:
- use late_initcall instead of deferring probe,
drivers/hwmon/iio_hwmon.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/iio_hwmon.c b/drivers/hwmon/iio_hwmon.c
index b550ba5..0a00bfb 100644
--- a/drivers/hwmon/iio_hwmon.c
+++ b/drivers/hwmon/iio_hwmon.c
@@ -192,7 +192,21 @@ static struct platform_driver __refdata iio_hwmon_driver = {
.remove = iio_hwmon_remove,
};
-module_platform_driver(iio_hwmon_driver);
+static struct platform_driver * const drivers[] = {
+ &iio_hwmon_driver,
+};
+
+static int __init iio_hwmon_late_init(void)
+{
+ return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
+}
+late_initcall(iio_hwmon_late_init);
+
+static void __exit iio_hwmon_exit(void)
+{
+ platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
+}
+module_exit(iio_hwmon_exit);
MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
MODULE_DESCRIPTION("IIO to hwmon driver");
--
2.5.0
next prev parent reply other threads:[~2016-07-26 7:44 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-26 7:43 [PATCH v3 0/4] add support for Allwinner SoCs ADC Quentin Schulz
2016-07-26 7:43 ` Quentin Schulz [this message]
2016-07-26 7:48 ` [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Thomas Petazzoni
2016-07-26 7:55 ` Quentin Schulz
2016-07-26 8:21 ` Alexander Stein
2016-07-26 8:24 ` Quentin Schulz
2016-07-26 9:05 ` Alexander Stein
2016-07-26 9:33 ` Quentin Schulz
2016-07-26 10:00 ` Alexander Stein
2016-07-26 10:07 ` Quentin Schulz
2016-07-26 16:04 ` Guenter Roeck
2016-08-15 15:40 ` Jonathan Cameron
2016-08-15 17:07 ` Guenter Roeck
2016-08-15 21:35 ` Jonathan Cameron
2016-09-01 7:15 ` Quentin Schulz
2016-09-01 9:03 ` Quentin Schulz
2016-09-03 19:32 ` Jonathan Cameron
2016-08-15 15:36 ` Jonathan Cameron
2016-07-26 7:43 ` [PATCH v3 2/4] mfd: add support for Allwinner SoCs ADC Quentin Schulz
2016-07-29 6:49 ` Maxime Ripard
2016-07-26 7:43 ` [PATCH v3 3/4] mfd: mfd-core: reattach mfd of_node to cells without of_compatible Quentin Schulz
2016-08-09 13:48 ` Lee Jones
2016-08-24 6:38 ` Maxime Ripard
2016-08-31 11:56 ` Lee Jones
2016-09-01 8:35 ` Quentin Schulz
2016-07-26 7:43 ` [PATCH v3 4/4] iio: adc: add support for Allwinner SoCs ADC Quentin Schulz
2016-07-29 7:12 ` Maxime Ripard
2016-08-04 8:41 ` Quentin Schulz
2016-08-24 6:41 ` Maxime Ripard
2016-08-04 9:56 ` Russell King - ARM Linux
2016-08-04 10:27 ` Quentin Schulz
2016-08-21 19:27 ` Jonathan Cameron
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=1469519027-11387-2-git-send-email-quentin.schulz@free-electrons.com \
--to=quentin.schulz@free-electrons.com \
--cc=antoine.tenart@free-electrons.com \
--cc=jdelvare@suse.com \
--cc=jic23@kernel.org \
--cc=knaack.h@gmx.de \
--cc=lars@metafoo.de \
--cc=lee.jones@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-hwmon@vger.kernel.org \
--cc=linux-iio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=maxime.ripard@free-electrons.com \
--cc=pmeerw@pmeerw.net \
--cc=thomas.petazzoni@free-electrons.com \
--cc=wens@csie.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).