Commit Graph

3350 Commits

Author SHA1 Message Date
Stefan Wahren
d4010c4af1 hwmon: raspberrypi: Prevent voltage low warnings from filling log
Although the correct fix for low voltage warnings is to
improve the power supply, the current implementation
of the detection can fill the log if the warning
happens freqently. This replaces the logging with
slightly custom ratelimited logging.

Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
2019-04-02 12:55:25 +01:00
Serge Schneider
a1a833d640 Add rpi-poe-fan driver
Signed-off-by: Serge Schneider <serge@raspberrypi.org>

PoE HAT driver cleanup

* Fix undeclared variable in rpi_poe_fan_suspend
* Add SPDX-License-Identifier
* Expand PoE acronym in Kconfig help
* Give clearer error message on of_property_count_u32_elems fail
* Add documentation
* Add vendor to of_device_id compatible string.
* Rename m_data_s struct to fw_data_s
* Fix typos

Fixes: #2665

Signed-off-by: Serge Schneider <serge@raspberrypi.org>
2019-04-02 12:55:23 +01:00
Cheng-Min Ao
ddb8d7c9d4 hwmon: (tmp421) Correct the misspelling of the tmp442 compatible attribute in OF device ID table
[ Upstream commit f422449b58 ]

Correct a typo in OF device ID table
The last one should be 'ti,tmp442'

Signed-off-by: Cheng-Min Ao <tony_ao@wiwynn.com>
Signed-off-by: Yu-Hsiang Chen <matt_chen@wiwynn.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-02-27 10:08:57 +01:00
Wei Yongjun
82f39f0219 hwmon: (lm80) Fix missing unlock on error in set_fan_div()
commit 07bd14ccc3 upstream.

Add the missing unlock before return from function set_fan_div()
in the error handling case.

Fixes: c9c6391551 ("hwmon: (lm80) fix a missing check of the status of SMBus read")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-23 09:07:26 +01:00
Kangjie Lu
040f76976e hwmon: (lm80) fix a missing check of bus read in lm80 probe
[ Upstream commit 9aa3aa15f4 ]

In lm80_probe(), if lm80_read_value() fails, it returns a negative
error number which is stored to data->fan[f_min] and will be further
used. We should avoid using the data if the read fails.

The fix checks if lm80_read_value() fails, and if so, returns with the
error number.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-02-12 19:47:16 +01:00
Kangjie Lu
8dcf84789e hwmon: (lm80) fix a missing check of the status of SMBus read
[ Upstream commit c9c6391551 ]

If lm80_read_value() fails, it returns a negative number instead of the
correct read data. Therefore, we should avoid using the data if it
fails.

The fix checks if lm80_read_value() fails, and if so, returns with the
error number.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
[groeck: One variable for return values is enough]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-02-12 19:47:16 +01:00
Huacai Chen
f3ff2ac416 hwmon: (w83795) temp4_type has writable permission
[ Upstream commit 09aaf6813c ]

Both datasheet and comments of store_temp_mode() tell us that temp1~4_type
is writable, so fix it.

Signed-off-by: Yao Wang <wangyao@lemote.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Fixes: 39deb6993e (" hwmon: (w83795) Simplify temperature sensor type handling")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-12-17 09:24:33 +01:00
Vadim Pasternak
0d4ff09997 hwmon: (mlxreg-fan) Fix macros for tacho fault reading
[ Upstream commit 243cfe3fb8 ]

Fix macros for tacometer fault reading.
This fix is relevant for three Mellanox systems MQMB7, MSN37, MSN34,
which are about to be released to the customers.
At the moment, none of them is at customers sites.

Fixes: 65afb4c8e7 ("hwmon: (mlxreg-fan) Add support for Mellanox FAN driver")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-12-17 09:24:32 +01:00
Nicolin Chen
3ef0d19cd8 hwmon: (ina2xx) Fix current value calculation
[ Upstream commit 38cd989ee3 ]

The current register (04h) has a sign bit at MSB. The comments
for this calculation also mention that it's a signed register.

However, the regval is unsigned type so result of calculation
turns out to be an incorrect value when current is negative.

This patch simply fixes this by adding a casting to s16.

Fixes: 5d389b1251 ("hwmon: (ina2xx) Make calibration register value fixed")
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-12-17 09:24:32 +01:00
Stefan Wahren
dbc62bd3b0 hwmon: (raspberrypi) Fix initial notify
[ Upstream commit 35fdc39021 ]

In case an under-voltage happens before probing the driver wont
write the critical warning into the kernel log. So don't init
of last_throttled during probe and fix this issue.

Fixes: 74d1e00791 ("hwmon: Add support for RPi voltage sensor")
Reported-by: "Noralf Trønnes" <noralf@tronnes.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-12-17 09:24:31 +01:00
Nicolin Chen
08cff35113 hwmon (ina2xx) Fix NULL id pointer in probe()
[ Upstream commit 70df9ebbd8 ]

When using DT configurations, the id pointer might turn out to
be NULL. Then the driver encounters NULL pointer access:

  Unable to handle kernel read from unreadable memory at vaddr 00000018
  [...]
  PC is at ina2xx_probe+0x114/0x200
  LR is at ina2xx_probe+0x10c/0x200
  [...]
  Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

The reason is that i2c core returns the id pointer by matching
id_table with client->name, while the client->name is actually
using the name from the first string in the DT compatible list,
not the best one. So i2c core would fail to match the id_table
if the best matched compatible string isn't the first one, and
then would return a NULL id pointer.

This probably should be fixed in i2c core. But it doesn't hurt
to make the driver robust. So this patch fixes it by using the
"chip" that's added to unify both DT and non-DT configurations.

Additionally, since id pointer could be null, so as id->name:
  ina2xx 10-0047: power monitor (null) (Rshunt = 1000 uOhm)
  ina2xx 10-0048: power monitor (null) (Rshunt = 10000 uOhm)

So this patch also fixes NULL name pointer, using client->name
to play safe and to align with hwmon->name.

Fixes: bd0ddd4d08 ("hwmon: (ina2xx) Add OF device ID table")
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-12-17 09:24:31 +01:00
Geert Uytterhoeven
1ea367bb99 hwmon: (ibmpowernv) Remove bogus __init annotations
[ Upstream commit e3e61f01d7 ]

If gcc decides not to inline make_sensor_label():

    WARNING: vmlinux.o(.text+0x4df549c): Section mismatch in reference from the function .create_device_attrs() to the function .init.text:.make_sensor_label()
    The function .create_device_attrs() references
    the function __init .make_sensor_label().
    This is often because .create_device_attrs lacks a __init
    annotation or the annotation of .make_sensor_label is wrong.

As .probe() can be called after freeing of __init memory, all __init
annotiations in the driver are bogus, and should be removed.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-11-27 16:13:04 +01:00
Dmitry Osipenko
a63fffbd90 hwmon: (core) Fix double-free in __hwmon_device_register()
commit 74e3512731 upstream.

Fix double-free that happens when thermal zone setup fails, see KASAN log
below.

==================================================================
BUG: KASAN: double-free or invalid-free in __hwmon_device_register+0x5dc/0xa7c

CPU: 0 PID: 132 Comm: kworker/0:2 Tainted: G    B             4.19.0-rc8-next-20181016-00042-gb52cd80401e9-dirty #41
Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
Workqueue: events deferred_probe_work_func
Backtrace:
[<c0110540>] (dump_backtrace) from [<c0110944>] (show_stack+0x20/0x24)
[<c0110924>] (show_stack) from [<c105cb08>] (dump_stack+0x9c/0xb0)
[<c105ca6c>] (dump_stack) from [<c02fdaec>] (print_address_description+0x68/0x250)
[<c02fda84>] (print_address_description) from [<c02fd4ac>] (kasan_report_invalid_free+0x68/0x88)
[<c02fd444>] (kasan_report_invalid_free) from [<c02fc85c>] (__kasan_slab_free+0x1f4/0x200)
[<c02fc668>] (__kasan_slab_free) from [<c02fd0c0>] (kasan_slab_free+0x14/0x18)
[<c02fd0ac>] (kasan_slab_free) from [<c02f9c6c>] (kfree+0x90/0x294)
[<c02f9bdc>] (kfree) from [<c0b41bbc>] (__hwmon_device_register+0x5dc/0xa7c)
[<c0b415e0>] (__hwmon_device_register) from [<c0b421e8>] (hwmon_device_register_with_info+0xa0/0xa8)
[<c0b42148>] (hwmon_device_register_with_info) from [<c0b42324>] (devm_hwmon_device_register_with_info+0x74/0xb4)
[<c0b422b0>] (devm_hwmon_device_register_with_info) from [<c0b4481c>] (lm90_probe+0x414/0x578)
[<c0b44408>] (lm90_probe) from [<c0aeeff4>] (i2c_device_probe+0x35c/0x384)
[<c0aeec98>] (i2c_device_probe) from [<c08776cc>] (really_probe+0x290/0x3e4)
[<c087743c>] (really_probe) from [<c0877a2c>] (driver_probe_device+0x80/0x1c4)
[<c08779ac>] (driver_probe_device) from [<c0877da8>] (__device_attach_driver+0x104/0x11c)
[<c0877ca4>] (__device_attach_driver) from [<c0874dd8>] (bus_for_each_drv+0xa4/0xc8)
[<c0874d34>] (bus_for_each_drv) from [<c08773b0>] (__device_attach+0xf0/0x15c)
[<c08772c0>] (__device_attach) from [<c0877e24>] (device_initial_probe+0x1c/0x20)
[<c0877e08>] (device_initial_probe) from [<c08762f4>] (bus_probe_device+0xdc/0xec)
[<c0876218>] (bus_probe_device) from [<c0876a08>] (deferred_probe_work_func+0xa8/0xd4)
[<c0876960>] (deferred_probe_work_func) from [<c01527c4>] (process_one_work+0x3dc/0x96c)
[<c01523e8>] (process_one_work) from [<c01541e0>] (worker_thread+0x4ec/0x8bc)
[<c0153cf4>] (worker_thread) from [<c015b238>] (kthread+0x230/0x240)
[<c015b008>] (kthread) from [<c01010bc>] (ret_from_fork+0x14/0x38)
Exception stack(0xcf743fb0 to 0xcf743ff8)
3fa0:                                     00000000 00000000 00000000 00000000
3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
3fe0: 00000000 00000000 00000000 00000000 00000013 00000000

Allocated by task 132:
 kasan_kmalloc.part.1+0x58/0xf4
 kasan_kmalloc+0x90/0xa4
 kmem_cache_alloc_trace+0x90/0x2a0
 __hwmon_device_register+0xbc/0xa7c
 hwmon_device_register_with_info+0xa0/0xa8
 devm_hwmon_device_register_with_info+0x74/0xb4
 lm90_probe+0x414/0x578
 i2c_device_probe+0x35c/0x384
 really_probe+0x290/0x3e4
 driver_probe_device+0x80/0x1c4
 __device_attach_driver+0x104/0x11c
 bus_for_each_drv+0xa4/0xc8
 __device_attach+0xf0/0x15c
 device_initial_probe+0x1c/0x20
 bus_probe_device+0xdc/0xec
 deferred_probe_work_func+0xa8/0xd4
 process_one_work+0x3dc/0x96c
 worker_thread+0x4ec/0x8bc
 kthread+0x230/0x240
 ret_from_fork+0x14/0x38
   (null)

Freed by task 132:
 __kasan_slab_free+0x12c/0x200
 kasan_slab_free+0x14/0x18
 kfree+0x90/0x294
 hwmon_dev_release+0x1c/0x20
 device_release+0x4c/0xe8
 kobject_put+0xac/0x11c
 device_unregister+0x2c/0x30
 __hwmon_device_register+0xa58/0xa7c
 hwmon_device_register_with_info+0xa0/0xa8
 devm_hwmon_device_register_with_info+0x74/0xb4
 lm90_probe+0x414/0x578
 i2c_device_probe+0x35c/0x384
 really_probe+0x290/0x3e4
 driver_probe_device+0x80/0x1c4
 __device_attach_driver+0x104/0x11c
 bus_for_each_drv+0xa4/0xc8
 __device_attach+0xf0/0x15c
 device_initial_probe+0x1c/0x20
 bus_probe_device+0xdc/0xec
 deferred_probe_work_func+0xa8/0xd4
 process_one_work+0x3dc/0x96c
 worker_thread+0x4ec/0x8bc
 kthread+0x230/0x240
 ret_from_fork+0x14/0x38
   (null)

Cc: <stable@vger.kernel.org> # v4.15+
Fixes: 47c332deb8 ("hwmon: Deal with errors from the thermal subsystem")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-21 09:19:19 +01:00
Thierry Reding
5764ffc8a6 hwmon: (pwm-fan) Set fan speed to 0 on suspend
[ Upstream commit 95dcd64bc5 ]

Technically this is not required because disabling the PWM should be
enough. However, when support for atomic operations was implemented in
the PWM subsystem, only actual changes to the PWM channel are applied
during pwm_config(), which means that during after resume from suspend
the old settings won't be applied.

One possible solution is for the PWM driver to implement its own PM
operations such that settings from before suspend get applied on resume.
This has the disadvantage of completely ignoring any particular ordering
requirements that PWM user drivers might have, so it is best to leave it
up to the user drivers to apply the settings that they want at the
appropriate time.

Another way to solve this would be to read back the current state of the
PWM at the time of resume. That way, in case the configuration was lost
during suspend, applying the old settings in PWM user drivers would
actually get them applied because they differ from the current settings.
However, not all PWM drivers support reading the hardware state, and not
all hardware may support it.

The best workaround at this point seems to be to let PWM user drivers
tell the PWM subsystem that the PWM is turned off by, in addition to
disabling it, also setting the duty cycle to 0. This causes the resume
operation to apply a configuration that is different from the current
configuration, resulting in the proper state from before suspend getting
restored.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-13 11:08:21 -08:00
Dmitry Bazhenov
43cba96d95 hwmon: (pmbus) Fix page count auto-detection.
commit e7c6a55606 upstream.

Devices with compatible="pmbus" field have zero initial page count,
and pmbus_clear_faults() being called before the page count auto-
detection does not actually clear faults because it depends on the
page count. Non-cleared faults in its turn may fail the subsequent
page count auto-detection.

This patch fixes this problem by calling pmbus_clear_fault_page()
for currently set page and calling pmbus_clear_faults() after the
page count was detected.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Bazhenov <bazhenov.dn@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-13 11:08:16 -08:00
Greg Kroah-Hartman
834d3cd294 Merge tag 'alloc-args-v4.19-rc8' of https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Kees writes:
  "Fix open-coded multiplication arguments to allocators

   - Fixes several new open-coded multiplications added in the 4.19
     merge window."

* tag 'alloc-args-v4.19-rc8' of https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  treewide: Replace more open-coded allocation size multiplications
2018-10-11 19:10:30 +02:00
Kees Cook
329e098939 treewide: Replace more open-coded allocation size multiplications
As done treewide earlier, this catches several more open-coded
allocation size calculations that were added to the kernel during the
merge window. This performs the following mechanical transformations
using Coccinelle:

	kvmalloc(a * b, ...) -> kvmalloc_array(a, b, ...)
	kvzalloc(a * b, ...) -> kvcalloc(a, b, ...)
	devm_kzalloc(..., a * b, ...) -> devm_kcalloc(..., a, b, ...)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-10-05 18:06:30 -07:00
Greg Kroah-Hartman
eb9a29f9e5 Merge tag 'hwmon-for-linus-v4.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Guenter writes:
   "Various bug fixes for nct6775 driver"
2018-09-19 22:59:30 +02:00
Guenter Roeck
5506635428 hwmon: (nct6775) Use different register to get fan RPM for fan7
The documented register to retrieve the fan RPM for fan7 is found
to be unreliable at least with NCT6796D revision 3. Let's use
register 0x4ce instead. This is undocumented for NCT6796D, but
documented for NCT6797D and NCT6798D and known to be working.

Reported-by: Robert Kern <ulteq@web.de>
Cc: Robert Kern <ulteq@web.de>
Fixes: 81820059a4 ("hwmon: (nct6775) Add support for NCT6796D")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-09-17 05:38:50 -07:00
Guenter Roeck
f6de298806 hwmon: (nct6775) Fix RPM output for fan7 on NCT6796D
fan7 on NCT6796D does not have a fan count register; it only has an RPM
register. Switch to using RPM registers to read the fan speed for all
chips supporting it to solve the problem for good.

Reported-by: Robert Kern <ulteq@web.de>
Cc: Robert Kern <ulteq@web.de>
Fixes: 81820059a4 ("hwmon: (nct6775) Add support for NCT6796D")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-09-15 16:18:44 -07:00
Guenter Roeck
37196ba4ae hwmon: (nct6775) Fix virtual temperature sources for NCT6796D
The following kernel log message is reported for the nct6775 driver
on ASUS WS X299 SAGE.

nct6775: Found NCT6796D or compatible chip at 0x2e:0x290
nct6775 nct6775.656: Invalid temperature source 11 at index 0,
			source register 0x100, temp register 0x73
nct6775 nct6775.656: Invalid temperature source 11 at index 2,
			source register 0x300, temp register 0x77
nct6775 nct6775.656: Invalid temperature source 11 at index 3,
			source register 0x800, temp register 0x79
nct6775 nct6775.656: Invalid temperature source 11 at index 4,
			source register 0x900, temp register 0x7b

A recent version of the datasheet lists temperature source 11 as reserved.
However, an older version of the datasheet lists temperature sources 10
and 11 as supported virtual temperature sources. Apparently the older
version of the datasheet is correct, so list those temperature sources
as supported.

Virtual temperature sources are different than other temperature sources:
Values are not read from a temperature sensor, but written either from
BIOS or an embedded controller. As such, each virtual temperature has to
be reported. Since there is now more than one temperature source, we have
to keep virtual temperature sources in a chip-specific mask and can no
longer rely on the assumption that there is only one virtual temperature
source with a fixed index. This accounts for most of the complexity of this
patch.

Reported-by: Robert Kern <ulteq@web.de>
Cc: Robert Kern <ulteq@web.de>
Fixes: 81820059a4 ("hwmon: (nct6775) Add support for NCT6796D")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-09-15 07:42:07 -07:00
Linus Torvalds
0f3aa48ad4 Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
 "A few more fixes who have trickled in:

   - MMC bus width fixup for some Allwinner platforms

   - Fix for NULL deref in ti-aemif when no platform data is passed in

   - Fix div by 0 in SCMI code

   - Add a missing module alias in a new RPi driver"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  memory: ti-aemif: fix a potential NULL-pointer dereference
  firmware: arm_scmi: fix divide by zero when sustained_perf_level is zero
  hwmon: rpi: add module alias to raspberrypi-hwmon
  arm64: allwinner: dts: h6: fix Pine H64 MMC bus width
2018-09-08 15:38:57 -07:00
Guenter Roeck
c793279c77 hwmon: (nct6775) Fix access to fan pulse registers
Not all fans have a fan pulse register. This can result in reading
beyond the end of REG_FAN_PULSES and FAN_PULSE_SHIFT arrays,
and was reported by smatch as possible error.

1672          for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
                              ^^^^^^^^^^^^^^^^^^^^^^^^
			      This is a 7 element array.
...
1685                  data->fan_pulses[i] =
1686                    (nct6775_read_value(data, data->REG_FAN_PULSES[i])
1687                          >> data->FAN_PULSE_SHIFT[i]) & 0x03;
                                 ^^^^^^^^^^^^^^^^^^^^^^^^
				 FAN_PULSE_SHIFT is either 5 or 6
				 elements.

To fix the problem, we have to ensure that all REG_FAN_PULSES and
FAN_PULSE_SHIFT have the appropriate length, and that REG_FAN_PULSES
is only read if the register actually exists.

Fixes: 6c009501ff ("hwmon: (nct6775) Add support for NCT6102D/6106D")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-09-07 09:33:36 -07:00
Dan Carpenter
e3f3d7ab00 hwmon: (nct6775) Set weight source to zero correctly
This is dead code because j can never be 1 at this point.  We had
intended to just test if the bit was clear.

Fixes: bbd8decd41 ("hwmon: (nct6775) Add support for weighted fan control")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-09-05 14:47:50 -07:00
Peter Robinson
d07f05fb86 hwmon: rpi: add module alias to raspberrypi-hwmon
The raspberrypi-hwmon driver doesn't automatically load, although it does work
when loaded, by adding the alias it auto loads as expected when built as a
module. Tested on RPi2/RPi3 on 32 bit kernel and RPi3B+ on aarch64 with
Fedora 28 and a patched 4.18 RC kernel.

Fixes: 3c493c885cf ("hwmon: Add support for RPi voltage sensor")
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
CC: Stefan Wahren <stefan.wahren@i2se.com>
CC: Eric Anholt <eric@anholt.net>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2018-09-05 11:58:00 -07:00
Gustavo A. R. Silva
d49dbfade9 hwmon: (nct6775) Fix potential Spectre v1
val can be indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.

This issue was detected with the help of Smatch:

vers/hwmon/nct6775.c:2698 store_pwm_weight_temp_sel() warn: potential
spectre issue 'data->temp_src' [r]

Fix this by sanitizing val before using it to index data->temp_src

Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].

[1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2

Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-26 17:45:25 -07:00
Dan Carpenter
f196dec6d5 hwmon: (adt7475) Make adt7475_read_word() return errors
The adt7475_read_word() function was meant to return negative error
codes on failure.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-26 17:45:25 -07:00
Dan Carpenter
9d19371df5 hwmon: (adt7475) Potential error pointer dereferences
The adt7475_update_device() function returns error pointers.  The
problem is that in show_pwmfreq() we dereference it before the check.
And then in pwm_use_point2_pwm_at_crit_show() there isn't a check at
all.  I don't know if it's required, but it silences a static checker
warning and it's doesn't hurt anything to check.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-26 17:45:25 -07:00
Lothar Felten
3ad867001c hwmon: (ina2xx) fix sysfs shunt resistor read access
fix the sysfs shunt resistor read access: return the shunt resistor
value, not the calibration register contents.

update email address

Signed-off-by: Lothar Felten <lothar.felten@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-26 17:45:25 -07:00
Linus Torvalds
f3ea496213 Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Olof Johansson:
 "Some of the larger changes this merge window:

   - Removal of drivers for Exynos5440, a Samsung SoC that never saw
     widespread use.

   - Uniphier support for USB3 and SPI reset handling

   - Syste control and SRAM drivers and bindings for Allwinner platforms

   - Qualcomm AOSS (Always-on subsystem) reset controller drivers

   - Raspberry Pi hwmon driver for voltage

   - Mediatek pwrap (pmic) support for MT6797 SoC"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (52 commits)
  drivers/firmware: psci_checker: stash and use topology_core_cpumask for hotplug tests
  soc: fsl: cleanup Kconfig menu
  soc: fsl: dpio: Convert DPIO documentation to .rst
  staging: fsl-mc: Remove remaining files
  staging: fsl-mc: Move DPIO from staging to drivers/soc/fsl
  staging: fsl-dpaa2: eth: move generic FD defines to DPIO
  soc: fsl: qe: gpio: Add qe_gpio_set_multiple
  usb: host: exynos: Remove support for Exynos5440
  clk: samsung: Remove support for Exynos5440
  soc: sunxi: Add the A13, A23 and H3 system control compatibles
  reset: uniphier: add reset control support for SPI
  cpufreq: exynos: Remove support for Exynos5440
  ata: ahci-platform: Remove support for Exynos5440
  soc: imx6qp: Use GENPD_FLAG_ALWAYS_ON for PU errata
  soc: mediatek: pwrap: add mt6351 driver for mt6797 SoCs
  soc: mediatek: pwrap: add pwrap driver for mt6797 SoCs
  soc: mediatek: pwrap: fix cipher init setting error
  dt-bindings: pwrap: mediatek: add pwrap support for MT6797
  reset: uniphier: add USB3 core reset control
  dt-bindings: reset: uniphier: add USB3 core reset support
  ...
2018-08-23 13:52:46 -07:00
Linus Torvalds
d5acba26bf Merge tag 'char-misc-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
 "Here is the bit set of char/misc drivers for 4.19-rc1

  There is a lot here, much more than normal, seems like everyone is
  writing new driver subsystems these days... Anyway, major things here
  are:

   - new FSI driver subsystem, yet-another-powerpc low-level hardware
     bus

   - gnss, finally an in-kernel GPS subsystem to try to tame all of the
     crazy out-of-tree drivers that have been floating around for years,
     combined with some really hacky userspace implementations. This is
     only for GNSS receivers, but you have to start somewhere, and this
     is great to see.

  Other than that, there are new slimbus drivers, new coresight drivers,
  new fpga drivers, and loads of DT bindings for all of these and
  existing drivers.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (255 commits)
  android: binder: Rate-limit debug and userspace triggered err msgs
  fsi: sbefifo: Bump max command length
  fsi: scom: Fix NULL dereference
  misc: mic: SCIF Fix scif_get_new_port() error handling
  misc: cxl: changed asterisk position
  genwqe: card_base: Use true and false for boolean values
  misc: eeprom: assignment outside the if statement
  uio: potential double frees if __uio_register_device() fails
  eeprom: idt_89hpesx: clean up an error pointer vs NULL inconsistency
  misc: ti-st: Fix memory leak in the error path of probe()
  android: binder: Show extra_buffers_size in trace
  firmware: vpd: Fix section enabled flag on vpd_section_destroy
  platform: goldfish: Retire pdev_bus
  goldfish: Use dedicated macros instead of manual bit shifting
  goldfish: Add missing includes to goldfish.h
  mux: adgs1408: new driver for Analog Devices ADGS1408/1409 mux
  dt-bindings: mux: add adi,adgs1408
  Drivers: hv: vmbus: Cleanup synic memory free path
  Drivers: hv: vmbus: Remove use of slow_virt_to_phys()
  Drivers: hv: vmbus: Reset the channel callback in vmbus_onoffer_rescind()
  ...
2018-08-18 11:04:51 -07:00
Linus Torvalds
5e2d059b52 Merge tag 'powerpc-4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
 "Notable changes:

   - A fix for a bug in our page table fragment allocator, where a page
     table page could be freed and reallocated for something else while
     still in use, leading to memory corruption etc. The fix reuses
     pt_mm in struct page (x86 only) for a powerpc only refcount.

   - Fixes to our pkey support. Several are user-visible changes, but
     bring us in to line with x86 behaviour and/or fix outright bugs.
     Thanks to Florian Weimer for reporting many of these.

   - A series to improve the hvc driver & related OPAL console code,
     which have been seen to cause hardlockups at times. The hvc driver
     changes in particular have been in linux-next for ~month.

   - Increase our MAX_PHYSMEM_BITS to 128TB when SPARSEMEM_VMEMMAP=y.

   - Remove Power8 DD1 and Power9 DD1 support, neither chip should be in
     use anywhere other than as a paper weight.

   - An optimised memcmp implementation using Power7-or-later VMX
     instructions

   - Support for barrier_nospec on some NXP CPUs.

   - Support for flushing the count cache on context switch on some IBM
     CPUs (controlled by firmware), as a Spectre v2 mitigation.

   - A series to enhance the information we print on unhandled signals
     to bring it into line with other arches, including showing the
     offending VMA and dumping the instructions around the fault.

  Thanks to: Aaro Koskinen, Akshay Adiga, Alastair D'Silva, Alexey
  Kardashevskiy, Alexey Spirkov, Alistair Popple, Andrew Donnellan,
  Aneesh Kumar K.V, Anju T Sudhakar, Arnd Bergmann, Bartosz Golaszewski,
  Benjamin Herrenschmidt, Bharat Bhushan, Bjoern Noetel, Boqun Feng,
  Breno Leitao, Bryant G. Ly, Camelia Groza, Christophe Leroy, Christoph
  Hellwig, Cyril Bur, Dan Carpenter, Daniel Klamt, Darren Stevens, Dave
  Young, David Gibson, Diana Craciun, Finn Thain, Florian Weimer,
  Frederic Barrat, Gautham R. Shenoy, Geert Uytterhoeven, Geoff Levand,
  Guenter Roeck, Gustavo Romero, Haren Myneni, Hari Bathini, Joel
  Stanley, Jonathan Neuschäfer, Kees Cook, Madhavan Srinivasan, Mahesh
  Salgaonkar, Markus Elfring, Mathieu Malaterre, Mauro S. M. Rodrigues,
  Michael Hanselmann, Michael Neuling, Michael Schmitz, Mukesh Ojha,
  Murilo Opsfelder Araujo, Nicholas Piggin, Parth Y Shah, Paul
  Mackerras, Paul Menzel, Ram Pai, Randy Dunlap, Rashmica Gupta, Reza
  Arbab, Rodrigo R. Galvao, Russell Currey, Sam Bobroff, Scott Wood,
  Shilpasri G Bhat, Simon Guo, Souptick Joarder, Stan Johnson, Thiago
  Jung Bauermann, Tyrel Datwyler, Vaibhav Jain, Vasant Hegde, Venkat
  Rao, zhong jiang"

* tag 'powerpc-4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (234 commits)
  powerpc/mm/book3s/radix: Add mapping statistics
  powerpc/uaccess: Enable get_user(u64, *p) on 32-bit
  powerpc/mm/hash: Remove unnecessary do { } while(0) loop
  powerpc/64s: move machine check SLB flushing to mm/slb.c
  powerpc/powernv/idle: Fix build error
  powerpc/mm/tlbflush: update the mmu_gather page size while iterating address range
  powerpc/mm: remove warning about ‘type’ being set
  powerpc/32: Include setup.h header file to fix warnings
  powerpc: Move `path` variable inside DEBUG_PROM
  powerpc/powermac: Make some functions static
  powerpc/powermac: Remove variable x that's never read
  cxl: remove a dead branch
  powerpc/powermac: Add missing include of header pmac.h
  powerpc/kexec: Use common error handling code in setup_new_fdt()
  powerpc/xmon: Add address lookup for percpu symbols
  powerpc/mm: remove huge_pte_offset_and_shift() prototype
  powerpc/lib: Use patch_site to patch copy_32 functions once cache is enabled
  powerpc/pseries: Fix endianness while restoring of r3 in MCE handler.
  powerpc/fadump: merge adjacent memory ranges to reduce PT_LOAD segements
  powerpc/fadump: handle crash memory ranges array index overflow
  ...
2018-08-17 11:32:50 -07:00
Linus Torvalds
9a76aba02a Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Highlights:

   - Gustavo A. R. Silva keeps working on the implicit switch fallthru
     changes.

   - Support 802.11ax High-Efficiency wireless in cfg80211 et al, From
     Luca Coelho.

   - Re-enable ASPM in r8169, from Kai-Heng Feng.

   - Add virtual XFRM interfaces, which avoids all of the limitations of
     existing IPSEC tunnels. From Steffen Klassert.

   - Convert GRO over to use a hash table, so that when we have many
     flows active we don't traverse a long list during accumluation.

   - Many new self tests for routing, TC, tunnels, etc. Too many
     contributors to mention them all, but I'm really happy to keep
     seeing this stuff.

   - Hardware timestamping support for dpaa_eth/fsl-fman from Yangbo Lu.

   - Lots of cleanups and fixes in L2TP code from Guillaume Nault.

   - Add IPSEC offload support to netdevsim, from Shannon Nelson.

   - Add support for slotting with non-uniform distribution to netem
     packet scheduler, from Yousuk Seung.

   - Add UDP GSO support to mlx5e, from Boris Pismenny.

   - Support offloading of Team LAG in NFP, from John Hurley.

   - Allow to configure TX queue selection based upon RX queue, from
     Amritha Nambiar.

   - Support ethtool ring size configuration in aquantia, from Anton
     Mikaev.

   - Support DSCP and flowlabel per-transport in SCTP, from Xin Long.

   - Support list based batching and stack traversal of SKBs, this is
     very exciting work. From Edward Cree.

   - Busyloop optimizations in vhost_net, from Toshiaki Makita.

   - Introduce the ETF qdisc, which allows time based transmissions. IGB
     can offload this in hardware. From Vinicius Costa Gomes.

   - Add parameter support to devlink, from Moshe Shemesh.

   - Several multiplication and division optimizations for BPF JIT in
     nfp driver, from Jiong Wang.

   - Lots of prepatory work to make more of the packet scheduler layer
     lockless, when possible, from Vlad Buslov.

   - Add ACK filter and NAT awareness to sch_cake packet scheduler, from
     Toke Høiland-Jørgensen.

   - Support regions and region snapshots in devlink, from Alex Vesker.

   - Allow to attach XDP programs to both HW and SW at the same time on
     a given device, with initial support in nfp. From Jakub Kicinski.

   - Add TLS RX offload and support in mlx5, from Ilya Lesokhin.

   - Use PHYLIB in r8169 driver, from Heiner Kallweit.

   - All sorts of changes to support Spectrum 2 in mlxsw driver, from
     Ido Schimmel.

   - PTP support in mv88e6xxx DSA driver, from Andrew Lunn.

   - Make TCP_USER_TIMEOUT socket option more accurate, from Jon
     Maxwell.

   - Support for templates in packet scheduler classifier, from Jiri
     Pirko.

   - IPV6 support in RDS, from Ka-Cheong Poon.

   - Native tproxy support in nf_tables, from Máté Eckl.

   - Maintain IP fragment queue in an rbtree, but optimize properly for
     in-order frags. From Peter Oskolkov.

   - Improvde handling of ACKs on hole repairs, from Yuchung Cheng"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1996 commits)
  bpf: test: fix spelling mistake "REUSEEPORT" -> "REUSEPORT"
  hv/netvsc: Fix NULL dereference at single queue mode fallback
  net: filter: mark expected switch fall-through
  xen-netfront: fix warn message as irq device name has '/'
  cxgb4: Add new T5 PCI device ids 0x50af and 0x50b0
  net: dsa: mv88e6xxx: missing unlock on error path
  rds: fix building with IPV6=m
  inet/connection_sock: prefer _THIS_IP_ to current_text_addr
  net: dsa: mv88e6xxx: bitwise vs logical bug
  net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()
  ieee802154: hwsim: using right kind of iteration
  net: hns3: Add vlan filter setting by ethtool command -K
  net: hns3: Set tx ring' tc info when netdev is up
  net: hns3: Remove tx ring BD len register in hns3_enet
  net: hns3: Fix desc num set to default when setting channel
  net: hns3: Fix for phy link issue when using marvell phy driver
  net: hns3: Fix for information of phydev lost problem when down/up
  net: hns3: Fix for command format parsing error in hclge_is_all_function_id_zero
  net: hns3: Add support for serdes loopback selftest
  bnxt_en: take coredump_record structure off stack
  ...
2018-08-15 15:04:25 -07:00
Tokunori Ikegami
4afec79f65 hwmon: (adt7475) Change show functions to return error data correctly
Change update device function to return an error pointer if needed,
and report the error to user space.

Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
[groeck: Clarified/updated description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-10 09:13:01 -07:00
Tokunori Ikegami
702afead45 hwmon: (adt7475) Change update functions to add error handling
I2C SMBus sometimes returns error codes.
In the error case, measurement values are updated incorrectly.
The sensor application then generates warning log messages and SNMP traps.
To prevent this, add error handling into the update functions.

Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
[groeck: Update description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-10 09:13:01 -07:00
Tokunori Ikegami
b36fb17159 hwmon: (adt7475) Change valid parameter to bool type
Currently the valid variable is of type char, but it is used as boolean.
So let's change it to bool.

Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
[groeck: Update description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-10 09:13:01 -07:00
Tokunori Ikegami
5cf943ede4 hwmon: (adt7475) Split device update function to measure and limits
The update function reads both measurement and limit values.
Those parts can be split so split them for a maintainability.

Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
[groeck: Clarify description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-10 09:13:01 -07:00
Guenter Roeck
cd6a2064db hwmon: k10temp: Support Threadripper 2920X, 2970WX; simplify offset table
All announced Threadripper 29xx models have a temperature offset of
27 degrees C. Simplify temperature offset table to match all 29xx
Threadripper models with a single entry. Also simplify the table to match
all 19xx Threadripper models with a single entry. This effectively drops
entries for Threadripper 1910/1920/1950 which never saw the light of day.

Cc: Michael Larabel <Michael@phoronix.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-09 12:56:56 -07:00
Michael Larabel
484a84f25c hwmon: (k10temp) 27C Offset needed for Threadripper2
For at least the Threadripper 2950X and Threadripper 2990WX,
it's confirmed a 27 degree offset is needed.

Signed-off-by: Michael Larabel <michael@phoronix.com>
Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-08-07 09:18:32 -07:00
Shilpasri G Bhat
e0da99123f hwmon: (ibmpowernv) Add attributes to enable/disable sensor groups
OPAL firmware provides the facility for some groups of sensors to be
enabled/disabled at runtime to give the user the option of using the
system resources for collecting these sensors or not.

For example, on POWER9 systems, the On Chip Controller (OCC) gathers
various system and chip level sensors and maintains their values in
main memory.

This patch provides support for enabling/disabling the sensor groups
like power, temperature, current and voltage.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: Commit message]
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-07-31 19:56:45 +10:00
Maxime Roussin-Bélanger
12005ec33f hwmon: (iio_hwmon) Use devm functions
Use devm_iio_channel_get_all() to automatically release
channels.

Use devm_hwmon_device_register_with_groups() to
automatically unregister the device.

Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com>
[groeck: Dropped now unnecessary platform_set_drvdata() and hwmon_dev]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-07-23 11:38:33 -07:00
Andrew Lunn
aa7f29b07c hwmon: Add support for power min, lcrit, min_alarm and lcrit_alarm
Some sensors support reporting minimal and lower critical power, as
well as alarms when these thresholds are reached. Add support for
these attributes to the hwmon core.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-18 10:01:46 +09:00
Olof Johansson
e541454a8f Merge tag 'arm-soc/for-4.19/drivers' of https://github.com/Broadcom/stblinux into next/drivers
This pull request contains Broadcom ARM/ARM64/MIPS SoCs drivers changes
for 4.19, please pull the following:

- Doug updates the low-level suspend/resume code for ARM SoCs to support
  the latest rev B3.0 memory controllers found on newer chips with an
  appropriate match structure to perform the correct entry sequencing

- Florian updates the Device Tree binding document for these memory
  controllers to list all possible compatible strings that exist given
   the supported memory controllers.

- Stefan adds the GET_THROTTLED firmware property value that is required
  for the Rasperry Pi voltage monitoring driver and updates the
  Raspberry Pi firmware driver accordingly to register such a device
  using the HWMON subsystem. Finally he adds support for reporting under
  voltage conditions using a specialized HWMON driver.

* tag 'arm-soc/for-4.19/drivers' of https://github.com/Broadcom/stblinux:
  firmware: raspberrypi: Remove VLA usage
  firmware: raspberrypi: Register hwmon driver
  hwmon: Add support for RPi voltage sensor
  soc: bcm: brcmstb: Add missing DDR MEMC compatible strings
  soc: bcm: brcmstb: pm: Add support for newer rev B3.0 controllers
  ARM: bcm2835: Add GET_THROTTLED firmware property

Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-14 14:14:47 -07:00
Stefan Wahren
74d1e00791 hwmon: Add support for RPi voltage sensor
Currently there is no easy way to detect undervoltage conditions on a
remote Raspberry Pi. This hwmon driver retrieves the state of the
undervoltage sensor via mailbox interface. The handling based on
Noralf's modifications to the downstream firmware driver. In case of
an undervoltage condition only an entry is written to the kernel log.

CC: "Noralf Trønnes" <noralf@tronnes.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Guenter Roeck <linux@roeck-us.net>
2018-07-09 10:47:27 -07:00
Tomer Maimon
f1fd4a4db7 hwmon: Add NPCM7xx PWM and Fan driver
Add Nuvoton BMC NPCM750/730/715/705 Pulse Width Modulation (PWM)
and Fan tacho driver.

The Nuvoton BMC NPCM750/730/715/705 supports 8 PWM controller outputs
and 16 Fan controller inputs.

The driver provides a sysfs entries through which the user can
configure the duty-cycle value from 0(off) and 255(full speed)
and read the fan tacho rpm value.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-07-08 20:08:13 -07:00
Kun Yi
7a001dbab4 hwmon: (pmbus/max34440) Add support for MAX34451.
MAX34451 is a 16-Channel Voltage/Current Monitor and 12-Channel
Sequencer.

Signed-off-by: Kun Yi <kunyi@google.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-07-08 20:08:13 -07:00
Vadim Pasternak
65afb4c8e7 hwmon: (mlxreg-fan) Add support for Mellanox FAN driver
Driver obtains PWM and tachometers registers location according to the
system configuration and creates FAN/PWM hwmon objects and a cooling
device. PWM and tachometers are controlled through the on-board
programmable device, which exports its register map. This device could be
attached to any bus type, for which register mapping is supported. Single
instance is created with one PWM control, up to 12 tachometers and one
cooling device. It could be as many instances as programmable device
supports.

Currently driver will be activated from the Mellanox platform driver:
drivers/platform/x86/mlx-platform.c.
For the future ARM based systems it could be activated from the ARM
platform module.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-07-08 20:08:13 -07:00
Gustavo A. R. Silva
ffb3243245 hwmon: Mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-07-08 20:08:13 -07:00
Guenter Roeck
57fec3acb4 hwmon: (nct6775) Fix comment in the description of pwm_mode
Commit 415eb2a1aa ("hwmon: (nct6775) Fix writing pwmX_mode") changed
the definition of the pwm_mode variable, but did not update the comment
describing it.

Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-07-08 20:08:13 -07:00
Jakob Albert
73ed6e22c3 hwmon: (nct7904) Fix UNSPECIFIED_INT warning
Fix UNSPECIFIED_INT warning reported by checkpatch.pl

Signed-off-by: Lorenz Kaestle <lorenz.kaestle@fau.de>
Signed-off-by: Jakob Albert <jakob.j.albert@fau.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2018-07-08 20:08:13 -07:00