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[2001:14ba:16f3:4a00::1]) by smtp.gmail.com with ESMTPSA id h19-20020a056512221300b00498f67cbfa9sm671086lfu.22.2022.10.01.00.44.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Oct 2022 00:44:07 -0700 (PDT) Date: Sat, 1 Oct 2022 10:44:01 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Subject: [RFT PATCH v2 1/2] iio: Add IIO_STATIC_CONST_DEVICE_ATTR Message-ID: References: MIME-Version: 1.0 In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221001_004411_226515_988164A1 X-CRM114-Status: GOOD ( 14.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexandre Belloni , linux-iio@vger.kernel.org, Srinivas Pandruvada , Gwendal Grignou , Paul Cercueil , Miquel Raynal , Guenter Roeck , chrome-platform@lists.linux.dev, Lars-Peter Clausen , Miaoqian Lin , Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Alexandru Ardelean , Mihail Chindris , Michael Hennerich , Matti Vaittinen , Cosmin Tanislav , Nathan Chancellor , Benson Leung , linux-arm-kernel@lists.infradead.org, Douglas Anderson , linux-kernel@vger.kernel.org, Eugen Hristev , Claudiu Beznea , Jonathan Cameron Content-Type: multipart/mixed; boundary="===============6302150861903724736==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============6302150861903724736== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="xd5zRoFn41p0ColK" Content-Disposition: inline --xd5zRoFn41p0ColK Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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 --- 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 { =3D { .string =3D _string, \ .dev_attr =3D __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)} =20 +#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 */ =20 /** --=20 2.37.3 --=20 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 =3D]=20 --xd5zRoFn41p0ColK Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEIx+f8wZb28fLKEhTeFA3/03aocUFAmM378EACgkQeFA3/03a ocXKeAf9HN002m865SDcUlmLtg0aCs/YoUrIHeUs903yq/3AedvqFTck32PpJzs5 l5Lg7yVnTVBJchAdezzNQghJuAcWqQZsoO1qT9HF+dTumrTM46zJ/vs87li1wWIP hPMyaxcuCUyaKPTXEPYawiAihAChYcurB7bm1VLwjtoI9f9kSAYMvNIerfXi11v/ /T1kipzgSUv79MaojvGw5iYNbkcrMhi9+rZXegQl+YiicZ7dEtjHhI6o1SifTzmT oV5x77T3dFww7/P25HfYhWyvfCPTTPuiRmzS6sHpH0H4PbFPhel9ULa2xHtr/NCy qfQUs3ugjSq+s3gwzpehS6cAtte2GA== =DkLa -----END PGP SIGNATURE----- --xd5zRoFn41p0ColK-- --===============6302150861903724736== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============6302150861903724736==--