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2020-09-23hwmon: use simple i2c probe function (take 2)Stephen Kitt1-4/+5
Many hwmon drivers don't use the id information provided by the old i2c probe function, and the remainder can easily be adapted to the new form ("probe_new") by calling i2c_match_id explicitly. This avoids scanning the identifier tables during probes. Drivers which didn't use the id are converted as-is; drivers which did are modified to call i2c_match_id() with the same level of error-handling (if any) as before. This patch wraps up the transition for hwmon, with four stragglers not included in the previous large patch. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20200821160354.594715-1-steve@sk2.org Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2019-05-24treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61Thomas Gleixner1-14/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-17docs: hwmon: Add an index file and rename docs to *.rstMauro Carvalho Chehab1-1/+1
Now that all files were converted to ReST format, rename them and add an index. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2019-04-15hwmon: (ads7828) Fix build warningGuenter Roeck1-1/+1
If CONFIG_OF is not enabled, the following build warning is observed. drivers/hwmon/ads7828.c:203:34: warning: ‘ads7828_of_match’ defined but not used Mark ads7828_of_match as __maybe_unused to fix the problem. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-12-16hwmon: (ads7828) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-10/+10
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/hwmon/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-04-02hwmon: (ads7828) Accept optional parameters from device treeSam Povilus1-0/+15
Adding the ability for the ads7828 and ads7830 to use device tree to get optional parameters instead of using platform devices. This allows people using custom boards to also use the ads7828 in a non-default manner. Signed-off-by: Sam Povilus <kernel.development@povil.us> [groeck: Fixed whitespace errors in ads7828.txt] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-04-02hwmon: (ads7828) Add OF device ID tableJavier Martinez Canillas1-1/+23
The driver doesn't have a struct of_device_id table but supported devices are registered via Device Trees. This is working on the assumption that a I2C device registered via OF will always match a legacy I2C device ID and that the MODALIAS reported will always be of the form i2c:<device>. But this could change in the future so the correct approach is to have an OF device ID table if the devices are registered via OF. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-04-19hwmon: (ads7828) Enable internal referenceAkshay Bhat1-0/+10
On ads7828 the internal reference defaults to off upon power up. When using internal reference, it needs to be turned on and the voltage needs to settle before normal conversion cycle can be started. Hence perform a dummy read in the probe to enable the internal reference allowing the voltage to settle before performing a normal read. Without this fix, the first read from the ADC when using internal reference always returns incorrect data. Signed-off-by: Akshay Bhat <akshay.bhat@timesys.com> Cc: stable@vger.kernel.org # v4.1+ Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2015-02-22hwmon: (ads7828) Check return value of devm_regmap_init_i2cAxel Lin1-0/+3
devm_regmap_init_i2c() can fail, thus add return value checking. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2015-02-02hwmon: (ads2828) Only keep data in device data structure if neededGuenter Roeck1-18/+14
The variables diff_input, ext_vref, and vref_mv are only used in the probe function and therefore don't need to be kept in the device data structure. Reviewed-and-Tested-by: Robert Rosengren <robert.rosengren@axis.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2015-02-02hwmon: (ads2828) Convert to use regmapGuenter Roeck1-44/+26
Simplify code and reduce code size by using regmap to access i2c registers. Reviewed-and-Tested-by: Robert Rosengren <robert.rosengren@axis.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2014-08-04hwmon: (ads7828) Convert to devm_hwmon_device_register_with_groupsAxel Lin1-38/+14
Use ATTRIBUTE_GROUPS macro and devm_hwmon_device_register_with_groups() to simplify the code a bit. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-08-11hwmon: use dev_get_platdata()Jingoo Han1-1/+1
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-01-25hwmon: Replace SENSORS_LIMIT with clamp_valGuenter Roeck1-3/+3
SENSORS_LIMIT and the generic clamp_val have the same functionality, and clamp_val is more efficient. This patch reduces text size by 9052 bytes and bss size by 11624 bytes for x86_64 builds. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: George Joseph <george.joseph@fairview5.com> Acked-by: Jean Delvare <khali@linux-fr.org>
2012-12-05hwmon: (ads7828) add support for ADS7830Guillaume Roguez1-6/+19
The ADS7830 device is almost the same as the ADS7828, except that it does 8-bit sampling, instead of 12-bit. This patch extends the ads7828 driver to support this chip. Signed-off-by: Guillaume Roguez <guillaume.roguez@savoirfairelinux.com> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-12-05hwmon: (ads7828) driver cleanupVivien Didelot1-142/+86
As there is no reliable way to identify the chip, it is preferable to remove the detect callback, to avoid misdetection. Module parameters are not worth it here, so let's get rid of them and add an ads7828_platform_data structure instead. Clean the code by removing unused macros, fixing coding style issues, avoiding function prototypes and using convenient macros such as module_i2c_driver(). Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-09-23hwmon: (ads7828) Convert to use devm_ functionsGuenter Roeck1-10/+5
Convert to use devm_ functions to reduce code size and simplify the code. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-03-18hwmon: (ads7828) Fix multi-line commentsGuenter Roeck1-29/+30
Cc: Steve Hardy <shardy@redhat.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-01-13module_param: make bool parameters really bool (drivers & misc)Rusty Russell1-2/+2
module_param(bool) used to counter-intuitively take an int. In fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy trick. It's time to remove the int/unsigned int option. For this version it'll simply give a warning, but it'll break next kernel version. Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-11-04hwmon: Use i2c_smbus_{read,write}_word_swappedJean Delvare1-9/+3
Make use of the new i2c_smbus_{read,write}_word_swapped functions. This makes the driver code more compact and readable. It also ensures proper error handling. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Dirk Eibach <eibach@gdsys.de> Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Guillaume Ligneul <guillaume.ligneul@gmail.com>
2011-01-12hwmon: (ads7828) Update email contact detailsSteven Hardy1-2/+2
Trivial patch updating my email contact details due to change of employer, and because I no longer have access to the previously used domain. Unfortunately I also no longer have access to any ads7828 hardware, but am happy to support/maintain the driver if others are able to test changes. Signed-off-by: Steve Hardy <shardy@redhat.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-12-14i2c: Drop I2C_CLIENT_INSMOD_1Jean Delvare1-5/+2
This macro simply declares an enum, so drivers might as well declare it themselves. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-12-14i2c: Get rid of struct i2c_client_address_dataJean Delvare1-1/+1
Struct i2c_client_address_data only contains one field at this point, which makes its usefulness questionable. Get rid of it and pass simple address lists around instead. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-12-14i2c: Drop the kind parameter from detect callbacksJean Delvare1-2/+2
The "kind" parameter always has value -1, and nobody is using it any longer, so we can remove it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-12-09hwmon: Clean up detect functionsJean Delvare1-12/+10
As kind is now hard-coded to -1, there is room for code clean-ups. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Corentin Labbe <corentin.labbe@geomatys.fr> Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Juerg Haefliger <juergh@gmail.com> Cc: Riku Voipio <riku.voipio@iki.fi> Acked-by: "Hans J. Koch" <hjk@linutronix.de> Cc: Rudolf Marek <r.marek@assembler.cz>
2008-07-16hwmon: (ads7828) Convert to a new-style i2c driverJean Delvare1-51/+38
The new-style ads7828 driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-04-30drivers: replace remaining __FUNCTION__ occurrencesHarvey Harrison1-1/+1
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-18hwmon: normal_i2c arrays should be constMark M. Hoffman1-1/+1
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
2008-02-07hwmon: Add support for Texas Instruments/Burr-Brown ADS7828Steve Hardy1-0/+297
Signed-off-by: Steve Hardy <steve@linuxrealtime.co.uk> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
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