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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 as follows:
* if the information in i2c_client is sufficient, that's used instead
(client->name);
* anything else is handled by calling i2c_match_id() with the same
level of error-handling (if any) as before.
A few drivers aren't included in this patch because they have a
different set of maintainers. They will be covered by other patches.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200813160222.1503401-1-steve@sk2.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Add support for the Maxim MAX6654 to the lm90 driver.
The MAX6654 is a temperature sensor, similar to the others,
but with some differences regarding the configuration
register, and the sampling rate at which extended resolution
becomes possible.
Signed-off-by: Josh Lehan <krellan@google.com>
Link: https://lore.kernel.org/r/20200513184248.145765-1-krellan@google.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The code to update the configuration register is repeated several times.
Move it into a separate function. At the same time, un-inline
lm90_select_remote_channel() and leave it up to the compiler to decide
what to do with it. Also remove the 'client' argument from
lm90_select_remote_channel() and from lm90_write_convrate() and take
it from struct lm90_data instead where needed.
This patch reduces code size by more than 800 bytes on x86_64.
Cc: Boyang Yu <byu@arista.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The configuration register does not change on its own. Yet, it is read
in various locations, modified, and written back. Simplify and optimize
the code by caching its value and by only writing it back when needed.
Cc: Boyang Yu <byu@arista.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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max6658 may report unrealistically high temperature during
the driver initialization, for which, its overtemp alarm pin
also gets asserted. For certain devices implementing overtemp
protection based on that pin, it may further trigger a reset to
the device. By reproducing the problem, the wrong reading is
found to be coincident with changing the conversion rate.
To mitigate this issue, set the stop bit before changing the
conversion rate and unset it thereafter. After such change, the
wrong reading is not reproduced. Apply this change only to the
max6657 kind for now, controlled by flag LM90_PAUSE_ON_CONFIG.
Signed-off-by: Boyang Yu <byu@arista.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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We have a dedicated pointer for that, so use it. Much easier to read and
less computation involved.
Reported-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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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>
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If CONFIG_OF is not enabled, the following build warning is observed.
drivers/hwmon/lm90.c:239:34: warning:
‘lm90_of_match’ defined but not used
Mark lm90_of_match as __maybe_unused to fix the problem.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The HWMON_CHANNEL_INFO macro simplifies the code, reduces the likelihood
of errors, and makes the code easier to read.
The conversion was done automatically with coccinelle. The semantic patch
used to make this change is as follows.
@r@
initializer list elements;
identifier i;
@@
-u32 i[] = {
- elements,
- 0
-};
@s@
identifier r.i,j,ty;
@@
-struct hwmon_channel_info j = {
- .type = ty,
- .config = i,
-};
@script:ocaml t@
ty << s.ty;
elements << r.elements;
shorter;
elems;
@@
shorter :=
make_ident (List.hd(List.rev (Str.split (Str.regexp "_") ty)));
elems :=
make_ident
(String.concat ","
(List.map (fun x -> Printf.sprintf "\n\t\t\t %s" x)
(Str.split (Str.regexp " , ") elements)))
@@
identifier s.j,t.shorter;
identifier t.elems;
@@
- &j
+ HWMON_CHANNEL_INFO(shorter,elems)
This patch does not introduce functional changes. Many thanks to
Julia Lawall for providing the semantic patch.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Replace S_<PERMS> 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>
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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>
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Use DEVICE_ATTR_RW for read/write attributes. This simplifies the source
code, improves readbility, and reduces the chance of inconsistencies.
The conversion was done automatically using coccinelle. It was validated
by compiling both the old and the new source code and comparing its text,
data, and bss size.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
[groeck: Updated description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Since commit commit eb1c8f4325d5 ("hwmon: (lm90) Convert to use new hwmon
registration API") the temp1_max_alarm and temp1_crit_alarm attributes are
mapped to the same alarm bit. Fix the typo.
Fixes: eb1c8f4325d5 ("hwmon: (lm90) Convert to use new hwmon registration API")
Signed-off-by: Micehael Walle <michael@walle.cc>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Reduce driver complexity and size by converting it to
the new hwmon API.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull more hwmon updates from Guenter Roeck:
- Improved error handling in tmp102, lm75, and lm90 drivers
- Bug fixes in sht3x, ftsteutates, iio_hwmon, and adt7411 drivers
* tag 'hwmon-for-linus-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (adt7411) set sane values for CFG1 and CFG3
hwmon: (iio_hwmon) fix memory leak in name attribute
hwmon: (ftsteutates) Fix potential memory access error
hwmon: (tmp102) Improve error handling
hwmon: (lm75) Improve error handling
hwmon: (lm90) Improve error handling
hwmon: (lm90) Add missing assignment
hwmon: (sht3x) set initial jiffies to last_update
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Replace devm_add_action() with devm_add_action_or_reset(),
and check its return value.
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Coverity reports the following error.
>>> CID 1364474: Error handling issues (CHECKED_RETURN)
>>> Calling "lm90_read_reg" without checking return value (as is done
>>> elsewhere 28 out of 29 times).
532 lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH);
533 if (val < 0)
534 return val;
Fixes: 10bfef47bd259 ("hwmon: (lm90) Read limit registers only once")
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
"Here is the I2C pull request for 4.8:
- the core and i801 driver gained support for SMBus Host Notify
- core support for more than one address in DT
- i2c_add_adapter() has now better error messages. We can remove all
error messages from drivers calling it as a next step.
- bigger updates to rk3x driver to support rk3399 SoC
- the at24 eeprom driver got refactored and can now read special
variants with unique serials or fixed MAC addresses.
The rest is regular driver updates and bugfixes"
* 'i2c/for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (66 commits)
i2c: i801: use IS_ENABLED() instead of checking for built-in or module
Documentation: i2c: slave: give proper example for pm usage
Documentation: i2c: slave: describe buffer problems a bit better
i2c: bcm2835: Don't complain on -EPROBE_DEFER from getting our clock
i2c: i2c-smbus: drop useless stubs
i2c: efm32: fix a failure path in efm32_i2c_probe()
Revert "i2c: core: Cleanup I2C ACPI namespace"
Revert "i2c: core: Add function for finding the bus speed from ACPI"
i2c: Update the description of I2C_SMBUS
i2c: i2c-smbus: fix i2c_handle_smbus_host_notify documentation
eeprom: at24: tweak the loop_until_timeout() macro
eeprom: at24: add support for at24mac series
eeprom: at24: support reading the serial number for 24csxx
eeprom: at24: platform_data: use BIT() macro
eeprom: at24: split at24_eeprom_write() into specialized functions
eeprom: at24: split at24_eeprom_read() into specialized functions
eeprom: at24: hide the read/write loop behind a macro
eeprom: at24: call read/write functions via function pointers
eeprom: at24: coding style fixes
eeprom: at24: move at24_read() below at24_eeprom_write()
...
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checkpatch rightfully complains that else after return is unnecessary.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Use bool for valid flag and leave it up to the compiler to find
an optimal representation.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Read limit registers only once at startup or after errors to improve
driver performance.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Return both error code and register value as return code from
read functions, and always check for errors.
This reduces code size on x86_64 by more than 1k while at
the same time improving error resiliency.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Since all other cleanup handled with devm_add_action, we can use
devm_hwmon_device_register_with_groups() to register the hwmon
device, and drop the remove function.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Use devm_add_action where possible to simplify error handling and
cleanup on remove.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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.alert() is meant to be generic, but there is currently no way
for the device driver to know which protocol generated the alert.
Add a parameter in .alert() to help the device driver to understand
what is given in data.
This patch is required to have the support of SMBus Host Notify protocol
through .alert().
Tested-by: Andrew Duggan <aduggan@synaptics.com>
For hwmon:
Acked-by: Guenter Roeck <linux@roeck-us.net>
For IPMI:
Acked-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The code handles this variable always as unsigned, so adapt the type.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Simplify code, reduce code size, and attach hwmon attributes to hwmon device.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
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Create all sysfs groups in one call by using sysfs_create_groups
instead of calling sysfs_create_group individually for each group.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
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Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
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With the new hwmon API, all attributes have to be created as groups.
Use sysfs_create_group and sysfs_remove_group instead of device_create_file
and device_remove_file to prepare for the new API.
Exception is the 'pec' attribute which will stay with the i2c device.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
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Signed-off-by: Jean Delvare <khali@linux-fr.org>
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Commit 109b1283fb (hwmon: (lm90) Add support to handle IRQ) introduced
interrupt support. Its error handling code fails to unregister the already
registered hwmon device.
Fixes: 109b1283fb532ac773a076748ffccf76a7067cab
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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The device lm90 can be controlled by the vcc rail.
Adding the regulator support to power on/off the vcc rail.
Enable the "vcc" regulator before accessing the device.
[JD: Rename variables to avoid confusion with registers.]
Signed-off-by: Wei Ni <wni@nvidia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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TI TMP451 is mostly compatible with ADT7461, except for
local temperature low byte and max conversion rate.
Add support to the LM90 driver.
Signed-off-by: Wei Ni <wni@nvidia.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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Using enums for the indexes and nrs of temp8 and temp11.
This make the code much more readable.
Signed-off-by: Wei Ni <wni@nvidia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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When the temperature exceed the limit range value,
the driver can handle the interrupt.
Signed-off-by: Wei Ni <wni@nvidia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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Add bit defines for the status register. And add a function
lm90_is_tripped() which will read status register and return
tripped or not, then lm90_alert can call it directly, and in the
future the IRQ thread also can use it.
[JD: Adjusted to include all the new MAX6696 status flags.]
Signed-off-by: Wei Ni <wni@nvidia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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Bit 2 of status register 2 on MAX6696 (external diode 2 open)
sets ALERT; the bit thus has to be listed in alert_alarms.
Also display a message in the alert handler if the condition
is encountered.
Even though not all overtemperature conditions cause ALERT
to be set, we should not ignore them in the alert handler.
Display messages for all out-of-range conditions.
Reported-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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time_after (as opposed to time_after_equal) already ensures that the
cache lifetime is at least as much as requested. There is no point in
manually adding another jiffy to that value, and this can confuse the
reader into wrong interpretation.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Imre Deak <imre.deak@intel.com>
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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>
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Convert to use devm_ functions to reduce code size and simplify the code.
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
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The lm90 driver restores the original chip configuration in its exit function.
However, the chip configuration is not restored if the probe function fails.
Restore it there as well.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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GMT G781 is a ADM1032-compatible temperature sensor chip.
Add support to the LM90 driver.
Cc: Mike Gorchak <lestat@i.com.ua>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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This patch converts the drivers in drivers/hwmon/* to use the
module_i2c_driver() macro which makes the code smaller and a bit simpler.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Corentin Labbe <corentin.labbe@geomatys.fr>
Cc: Dirk Eibach <eibach@gdsys.de>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Steve Glendinning <steve.glendinning@smsc.com>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Guillaume Ligneul <guillaume.ligneul@gmail.com>
Cc: David George <david.george@ska.ac.za>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Cc: Marc Hulsman <m.hulsman@tudelft.nl>
Cc: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
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When writing the update_interval attribute, the parameter value was
not range checked, which could cause an integer overflow and result
in an arbitrary update interval. Fix by limiting the value range to
<0, 100000>.
Reported-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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replaced strict_strtol with kstrtol and
replaced strict_strtuol with kstrtuol
This satisfies checkpatch -f
Compile tested only: no warnings or errors given
Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
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Clean up the code to make it more readable:
* Remove reg_ and new_ prefixes from variable names, they made the
names longer, causing extra line breaks, while not adding much
value.
* Introduce struct device dev* = &client->dev in two functions, to
avoid repeating client->dev everywhere in these functions.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
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With some configuration option combinations, we get the following
warnings:
drivers/hwmon/lm90.c: In function 'lm90_detect':
drivers/hwmon/lm90.c:1114: warning: 'chip_id' may be used uninitialized
in this function
drivers/hwmon/lm90.c:1114: warning: 'reg_config1' may be used
uninitialized in this function
drivers/hwmon/lm90.c:1114: warning: 'reg_convrate' may be used
uninitialized in this function
drivers/hwmon/lm90.c:1187: warning: 'reg_emerg2' may be used
uninitialized in this function
drivers/hwmon/lm90.c:1187: warning: 'reg_status2' may be used
uninitialized in this function
We can solve these easily by reading the register values first and
checking for errors later. These errors should be very rare, even in
the case of failed detection, so this change has no impact on
performance. And this makes checkpatch.pl happier.
Reported-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
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Several vendors implement a second configuration register, which we
check during device detection. Refactor the code to avoid duplication.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Stijn Devriendt <sdevrien@cisco.com>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
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