From: Matti Vaittinen <mazziesaccount@gmail.com>
To: Matti Vaittinen <mazziesaccount@gmail.com>,
Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Cc: "Alexandre Belloni" <alexandre.belloni@bootlin.com>,
linux-iio@vger.kernel.org,
"Srinivas Pandruvada" <srinivas.pandruvada@linux.intel.com>,
"Gwendal Grignou" <gwendal@chromium.org>,
"Paul Cercueil" <paul@crapouillou.net>,
"Miquel Raynal" <miquel.raynal@bootlin.com>,
"Guenter Roeck" <groeck@chromium.org>,
chrome-platform@lists.linux.dev,
"Lars-Peter Clausen" <lars@metafoo.de>,
"Miaoqian Lin" <linmq006@gmail.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Alexandru Ardelean" <alexandru.ardelean@analog.com>,
"Mihail Chindris" <mihail.chindris@analog.com>,
"Michael Hennerich" <Michael.Hennerich@analog.com>,
"Matti Vaittinen" <mazziesaccount@gmail.com>,
"Cosmin Tanislav" <cosmin.tanislav@analog.com>,
"Nathan Chancellor" <nathan@kernel.org>,
"Benson Leung" <bleung@chromium.org>,
linux-arm-kernel@lists.infradead.org,
"Douglas Anderson" <dianders@chromium.org>,
linux-kernel@vger.kernel.org,
"Eugen Hristev" <eugen.hristev@microchip.com>,
"Claudiu Beznea" <claudiu.beznea@microchip.com>,
"Jonathan Cameron" <jic23@kernel.org>
Subject: [RFT PATCH v2 1/2] iio: Add IIO_STATIC_CONST_DEVICE_ATTR
Date: Sat, 1 Oct 2022 10:44:01 +0300 [thread overview]
Message-ID: <ad6753e27cfefe9ecb5db2c089d1fcee427ab7c9.1664610071.git.mazziesaccount@gmail.com> (raw)
In-Reply-To: <cover.1664610071.git.mazziesaccount@gmail.com>
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Add IIO_STATIC_CONST_DEVICE_ATTR macro for creating an read-only
iio_dev_attr which returns constant value. This macro is intended to be
used when replacing the IIO_CONST_ATTR - attributes for triggered
buffers because the triggered buffer attributes must be of type
iio_dev_attr.
Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
---
include/linux/iio/sysfs.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h
index e51fba66de4b..de5bb125815c 100644
--- a/include/linux/iio/sysfs.h
+++ b/include/linux/iio/sysfs.h
@@ -97,6 +97,17 @@ struct iio_const_attr {
= { .string = _string, \
.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
+#define IIO_STATIC_CONST_DEVICE_ATTR(_name, _string) \
+ static ssize_t iio_const_dev_attr_show_##_name( \
+ struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+ { \
+ return sysfs_emit(buf, "%s\n", _string); \
+ } \
+ static IIO_DEVICE_ATTR(_name, 0444, \
+ iio_const_dev_attr_show_##_name, NULL, 0)
+
/* Generic attributes of onetype or another */
/**
--
2.37.3
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
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next prev parent reply other threads:[~2022-10-01 7:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-01 7:43 [RFT PATCH v2 0/2] iio: Fix unsafe buffer attributes Matti Vaittinen
2022-10-01 7:44 ` Matti Vaittinen [this message]
2022-10-01 7:44 ` [RFT PATCH v2 2/2] " Matti Vaittinen
2022-10-02 13:57 ` Jonathan Cameron
2022-10-02 14:25 ` Matti Vaittinen
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