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This makes it possible to use the hwmon_dev in fan_alarm_notify(). Otherwise
it would be possible, that a interupt arrives and fan_alarm_notify() is
executed, before hwmon_dev is initialized.
Signed-off-by: Christian Schneider <cschneider@radiodata.biz>
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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Linux style for comments is the C89 "/* ... */" style,
changes the comments to Linux style.
Signed-off-by: amy.shih <amy.shih@advantech.com.tw>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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When register read and write operations return errors, needs to add
error handling.
Signed-off-by: amy.shih <amy.shih@advantech.com.tw>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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This gets rid of the unnecessary license boilerplate, and avoids
having to deal with individual patches one by one.
No functional changes intended.
Reviewed-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The newly added variable is only used in an #if block:
drivers/hwmon/max6650.c: In function 'max6650_probe':
drivers/hwmon/max6650.c:766:33: error: unused variable 'cooling_dev' [-Werror=unused-variable]
Change the #if to if() so the compiler can see what is actually
going on.
Fixes: a8463754a5a9 ("hwmon: (max6650) Use devm function to register thermal device")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Not every chip supported by this driver supports setting the number
of samples for power averaging. Also, the power monitoring register
is not always a 16-bit register, and the configuration bits used for
voltage sampling are different depending on the register width.
Some conditional code is needed to fix the problem.
On top of all that, the compiler complains about problems with
FIELD_GET and FIELD_PREP macros if the file is built with W=1.
Avoid using those macros to silence the warning.
Cc: Krzysztof Adamski <krzysztof.adamski@nokia.com>
Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Reviewed-by: Krzysztof Adamski <krzysztof.adamski@nokia.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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When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Luca Tettamanti <kronos.it@gmail.com>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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CHECK: struct mutex definition without comment
CHECK: Alignment should match open parenthesis
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Pass errors from i2c_smbus_read_byte_data() back to the caller of
max6650_update_device().
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Only tachometer and alarm status registers are modified by the chip.
All other registers only need to be read only once, and reading them
repeatedly does not add any value.
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Convert driver to use devm_hwmon_device_register_with_info to simplify
the code and to reduce its size.
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Instead of re-reading the alarm register after reporting an alarm,
mark cached values as invalid. While this results in always reading all
data on subsequent reads, it is quite unlikely that such reads will
actually happen before the cache times out. The upside is avoiding
unnecessary unconditional i2c read operations.
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The alarm_en register is read each time the is_visible function is called.
Since it is a configuration register, this is completely unnecessary.
Read it once and cache its value.
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Declare valid as boolean to match its use case.
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Do not overwrite errors reported from i2c functions, and don't ignore
any errors.
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Consolidate conversion from pwm value to dac value and from dac value
to pwm value into helper functions.
While doing this, only update the cached dac value if writing it
to the chip was successful after an update. Also, put macro argument
of DIV_FROM_REG() into (), and simplify return statement of
max6650_set_cur_state().
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Use devm_thermal_of_cooling_device_register to register the thermal
cooling device. This lets us drop the remove function.
At the same time, use 'dev' variable in probe function consistently.
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The hwmon core registers the hwmon device before adding sensors to the
thermal core. If that fails, the hwmon device is released and an error
is returned to the caller. From the code flow, it appears to be necessary
to free struct hwmon_device *, allocated with kzalloc(), in that
situation. This is incorrect, since the data structure will be freed
automatically in hwmon_dev_release() when device_unregister() is called.
This used to result in a double free, which was found and fixed with
commit 74e3512731bd ("hwmon: (core) Fix double-free in
__hwmon_device_register()"). This is, however, not obvious; any reader
may erroneously conclude that the data structure is not freed.
Add comment explaining why kfree() is not necessary in this situation.
Reported-by: Eduardo Valentin <eduval@amazon.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Kbuild test robot reports outside array bounds warnings.
This is reproducible for ARCH=sh allmodconfig with the kernel.org
toolchains available at:
https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/8.1.0/x86_64-gcc-8.1.0-nolibc-sh4-linux.tar.xz
CC [M] drivers/hwmon/smsc47m1.o
drivers/hwmon/smsc47m1.c: In function 'fan_div_store':
drivers/hwmon/smsc47m1.c:370:49: warning: array subscript [0, 2] is outside array bounds of 'u8[3]' {aka 'unsigned char[3]'} [-Warray-bounds]
tmp = 192 - (old_div * (192 - data->fan_preload[nr])
~~~~~~~~~~~~~~~~~^~~~
drivers/hwmon/smsc47m1.c:372:19: warning: array subscript [0, 2] is outside array bounds of 'u8[3]' {aka 'unsigned char[3]'} [-Warray-bounds]
data->fan_preload[nr] = clamp_val(tmp, 0, 191);
~~~~~~~~~~~~~~~~~^~~~
drivers/hwmon/smsc47m1.c:373:53: warning: array subscript [0, 2] is outside array bounds of 'const u8[3]' {aka 'const unsigned char[3]'} [-Warray-bounds]
smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
~~~~~~~~~~~~~~~~~~~~~~~~^~~~
Looking at the code, I believe these are false positives.
While it is ridiculous to patch our driver to make the insane
compiler happy, clarifying the unreachable path will be helpful
not only for compilers but also for humans.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
[groeck: Use BUG() instead of unreachable() to make objtool happy]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Add a driver to support the Infineon IRPS5401 PMIC. This chip has 5
pages corresponding to 4 switching outputs and one linear (LDO) output.
The switching and LDO outputs have slightly different supported
parameters.
Signed-off-by: Robert Hancock <hancock@sedsystems.ca>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Detect the multi-function of voltage, thermal diode and thermistor
from register VT_ADC_MD_REG to set value of tcpu_mask in nct7904_data
struct, set temp[1-5]_input the input values TEMP_CH1~4 and LTD of
temperature. Set temp[6~13]_input the input values of DTS temperature
that correspond to sensors TCPU1~8.
Signed-off-by: amy.shih <amy.shih@advantech.com.tw>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Christian Schneider
Guenter Roeck
Boyang Yu
amy.shih
Arnd Bergmann
Wolfram Sang
Greg Kroah-Hartman
Masahiro Yamada
Robert Hancock