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Several of the chips supported by this driver support configuring the
number of samples (or the fault queue depth) necessary before a fault
or alarm is reported. This is done either with a bit in the configuration
register or with a separate "consecutive alert" register. Support this
functionality with the temp_samples attribute.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Add table with device names and known register values for supported
devices from Analog / ON Semiconductor.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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NE1618 is similar to NE1617 but supports manufacturer and chip ID
registers as well as 11 bit external temperature resolution.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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ADM1020 is compatible with ADM1021 but has a separate chip revision and
a limited I2C address range.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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It was observed that the alert handler may be called from the i2c core
even after alerts have already been disabled. Only disable alerts if
they have not already been disabled.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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ADT7421 is similar to ADT7461A but supports configurable Beta Compensation.
Packet Error Checking (PEC) is supported but undocumented.
A devicetree node is not added for the added chip since it is quite
unlikely that such an old chip will ever be used in a devicetree based
system. It can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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NCT218 is compatible to NCT72 and NCT214. It also supports PEC (packet
error checking). Similar to NCT72 and NCT214, PEC support is undocumented.
Unlike NCT214 and NCT72, NCT218 does not support the undocumented secondary
chip and manufacturer ID registers at 0x3e and 0x3f and returns 0x00 when
reading those registers. The value for the chip revision register is not
documented but was observed to be 0xca. Use that information to improve
chip detection accuracy.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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NCT214 and NCT72 are compatible to ADT7461/ADT7461A but have full
PEC (packet error checking) support. PEC support is undocumented.
Both chips support the undocumented secondary chip and manufacturer
ID registers at 0x3e and 0x3f, and return 0x61 as chip ID. Use this
information to improve the accuracy of chip detection code.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Unlike ADM1023 and compatible chips, NCT210 does not support a temperature
offset register. A real chip was found to have a chip revision of 0x3f.
Use it to detect NCT210 explicitly.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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LM86 and LM90 support exactly the same features, so there is no need
to keep their configuration options separate. Combine to reduce data
size.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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All chips supported by the ADM1021 driver are also supported by the LM90
driver. Make that support official.
After this change, the adm1021 driver is only needed if the lm90 driver
is disabled. Also, the adm1021 driver misdetects a variety of chips as
MAX1617A, which is unwanted if any of those chips is in the system.
For this reason. make the adm1021 driver dependent on !SENSORS_LM90 to
show that it is not needed if the lm90 driver is enabled, and to avoid
misdetection if a chip supported by the lm90 driver is in the system.
Devicetree nodes are not added for the added chips since it is quite
unlikely that such old chips will ever be used in a devicetree based
system. They can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Both chips are quite similar to other chips of this series, so add
support for them to the lm90 driver. Also mention ON Semiconductor NCT210,
which is pin and register compatible to ADM1021A.
None of the chips support the secondary manufacturer and chip ID registers
at 0x3e and 0x3f, but return 0 when reading from those registers.
Use that information to improve the accuracy of chip detection code.
Devicetree nodes are not added for the added chips since it is quite
unlikely that such old chips will ever be used in a devicetree based
system. They can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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MAX1617 and LM84 are stripped-down versions of LM90, so they can easily
be supported by the LM90 driver. The most difficult part is chip detection,
since those old chips do not support manufacturer ID or chip ID registers.
The "alarms" attribute is enabled for both chips to match the functionality
of the adm1021 driver. Chip detection was improved and is less prone to
misdetection than the chip detection in the adm1021 driver.
Devicetree nodes are not added for the added chips since it is quite
unlikely that such old chips will ever be used in a devicetree based
system. They can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Introduce 16-bit register write function to simplify the code in
some places.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Simplify the code a bit by handling single-register read operations
in lm90_read16(). All we need to do is to skip the low-byte read
operation if the register address is 0.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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MAX6642 is a reduced version of LM90 with no low limits and no conversion
rate register. Its alert functionality is broken, similar to many other
chips supported by the lm90 driver.
After this change, the stand-alone max6642 driver is only needed if the
lm90 driver is disabled. Make it dependent on SENSORS_LM90=n to show that
it is not needed if the lm90 driver is enabled.
A devicetree node is not added for this chip since it is quite unlikely
that such an old chip will ever be used in a devicetree based system.
It can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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A flag indicating support for setting the conversion rate doesn't cost
much and will enable us to add support for MAX6642 to the lm90 driver.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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A flag indicating support for minimum temperature limits doesn't cost much
and will enable us to add support for MAX6642 to the lm90 driver.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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MAX6690 is all but identical to MAX6654. Revision 1 of its
datasheet lists the same chip ID as MAX6654, and a chip labeled
MAX6654 was found to have the chip ID listed as MAX6690 chip ID
in Revision 2 of its datasheet.
A devicetree node is not added for this chip since it is quite unlikely
that such an old chip will ever be used in a devicetree based system.
It can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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ADT7461A and NCT1008 support the undocumented manufacturer and chip ID
registers at 0x3e and 0x3f, and return 0x61 as chip ID. ADM1032 and
ADT7461 do not support those registers but return 0 when reading them.
Use this information to improve the accuracy of the chip detection code.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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ADT7481, ADT7482, and ADT7483 are similar to ADT7461, but support two
external temperature sensors, similar to MAX6695/6696. They support an
extended temperature range similar to ADT7461. Registers for the second
external channel can be accessed directly or by using the same method as
used by MAX6695/6696. For simplicity, the access method implemented for
MAX6695/6696 is used.
The chips support PEC (packet error checking). Set the PEC feature flag
and let the user decide if it should be enabled or not (it is by default
disabled).
Even though it is only documented for ADT7483, all three chips support a
secondary manufacturer ID register at 0x3e and a chip ID register at 0x3f.
Use the contents of those registers register for improved chip detection
accuracy. Add the same check to the ADT7461A detection code since this chip
also supports the same (undocumented) registers.
Devicetree nodes are not added for the added chips since it is quite
unlikely that such old chips will ever be used in a devicetree based
system. They can be added later if needed.
Reviewed-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Unlike MAX6646/MAX6647/MAX6649, MAX6648 and MAX6692 only support
a temperature range of 0..127 degrees C. Separate support for the
two sets of chips to be able to support maximum temperature ranges
correctly for all chips. Introduce new feature flag to indicate
temperature support up to 255 degrees C.
Since the chips are almost identical except for the supported temperature
range, automatic chip detection is limited. Effectively this means that
MAX6648 may be mis-detected as MAX6649 when auto-detected, but there is
nothing we can do about that.
Devicetree nodes are not added for the added chips since it is quite
unlikely that such old chips will ever be used in a devicetree based
system. They can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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We don't want to support the obsolete 'alarms' attribute for new
chips supported by this driver. Add flag to indicate 'alarms' attribute
support and use it for existing chips. This flag will not be set for
additional chips supported by this driver in the future.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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When support for G781 was added, chips with ID 0x01 were found at I2C
addresses 0x4c and 0x4d. The G781 datasheet (version 1.3 from October 2003)
says that the device ID for G781-1 is 0x03, not 0x01. Also, the datasheet
states that the chip at I2C address is G781 and the chip at I2C address
0x4d is G781-1.
A G781-1 at I2C address 0x4d was now found to have a chip ID of 0x03
as suggested by the datasheet. Accept both 0x01 and 0x03 chip IDs at both
addresses to ensure that all variants of G781 are detected properly.
While at it, improve chip detection accuracy by reading two additional
registers and ensuring that only expected bits are set in those registers.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The NCT1008 datasheet, Revision 3, states that its chip revision is
0x57. This matches the ADT7461A chip revision, and NCT1008 is therefore
detected as ADT7461A. In revision 6 of the datasheet, the chip revision
register is no longer documented. Multiple samples of NCT1008 were found
to report a chip revision of 0x54. As it turns out, one of the patches
submitted to add NCT1008 support to the lm90 driver already included a
check for chip revision 0x54. Unfortunately, that patch never made it into
the kernel. Remedy the situation and explicitly detect chips with revision
0x54 as NCT1008.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The detect function is getting larger and larger and difficult to
understand or review. Split it into per-manufacturer detect functions
to improve readability.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Since temperature conversion functions are now unified, there is no need
to keep "the chip supports a configurable extended temperature range" and
"the chip has extended temperature range enabled" flags separate.
Use a single flag instead to reflect both.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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While most LM90 compatible chips support a temperature sensor resolution
of 11 bit, this is not the case for all chips. ADT7461 only supports a
resolution of 10 bit, and TMP451/TMP461 support a resolution of 12 bit.
Add support for various temperature sensor resolutions. To do this,
model all temperature sensors as 16 bit sensors, and use unified
temperature conversion functions which take the sensor resolution
as parameter.
While enhancing functionality, this has the positive side effect of
reducing code size by about 5%.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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When reading 16-bit volatile registers, the code uses a trick to
determine if a temperature is consistent: It reads the high part
of the register twice. If the values are the same, the code assumes
that the reading is consistent. If the value differs, the code
re-reads the second register as well and assumes that it now has
correct values.
This is only necessary for volatile registers. Add a parameter to
lm90_read16() to indicate if the register is volatile to avoid the
extra overhead for non-volatile registers.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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ADT7461 and TMP451 temperature sensors support extended temperature ranges.
If standard temperature range is selected, the temperature range is
unsigned and limited to 0 .. 127 degrees C. For TMP461, the standard
temperature range is -128000 ... 127000 degrees C. Distinguish between
the two chips by introducing a feature flag indicating if the standard
temperature range is signed or unsigned. Use the same flag for MAX6646/
MAX6647 as well since those chips also support unsigned temperatures.
Note that while the datasheet for ADT7461 suggests that the default
temperature range is unsigned, tests with a real chip suggest that this
is not the case: If the temperature offset is set to a value << 0,
the temperature register does report negative values.
Tests with real chips show that MAX6680/MAX6681 and SA56004 report
temperatures of 128 degrees C and higher as negative temperatures.
Add respective comments to the code.
Also use clamp_val() and DIV_ROUND_CLOSEST where appropriate in
calculations.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Experiments show that ADT7461A and NCT1008 support PEC, even though it is
not documented. Enable support for it in the driver. Since ADT7461 only
supports partial PEC, this means that the configuration for ADT7461A
needs to be separated from ADT7461.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Revision 0 of the ADT7461 datasheet suggests that the chip supports PEC
(packet error checking). This information is gone in later versions of the
datasheet. Experiments show that PEC support on ADT7461 is similar to PEC
support in ADM1032, ie it is only supported for read operations. Add
support for it to the driver.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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PEC (packet error checking) support for ADM1032 is currently only enabled
if the chip was auto-detected, but not if a chip is instantiated
explicitly. Always enable PEC support by introducing a chip feature flag
indicating partial PEC support. Also, for consistency, disable PEC support
by default to match existing functionality if the chip was not auto-
detected.
At the same time, introduce generic support for PEC with a separate feature
flag. This will be used when support for chips with full PEC functionality
is added.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The register write address either matches the read address, or it is the
read address plus 6. Simplify the code and resolve the write address
programmatically instead of having two defines for each register.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Handling bit shifts necessary to extract status bits during compile time
reduces code and data size by almost 5% when building for x86_64.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Use BIT macro instead of shift operation to improve readability.
No functional change.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Reorder chip enumeration in alphabetical order to make it easier to
see which chips are supported, and to clarify where to add support
new chip types. No functional change.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Reorder include files in alphabetical order to reduce the chance of
duplicates and to make it clear where new include files should be
added. Drop the unnecessary include of linux/sysfs.h. Include
linux/device.h instead because that is what is actually used.
No functional change.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Many chips supported by this driver clear status registers after it
is read and update it in the next measurement cycle. Normally this falls
under the radar because all registers are only read once per measurement
cycle. However, there is an exception: Status registers are always read
during interrupt and laert handling. This can result in invalid status
reports if userspace reads an alarm attribute immediately afterwards.
Rework alarm/status handling by keeping a shadow register with 'current'
alarms, and by ensuring that the register is either only updated once per
measurement cycle or not cleared.
A second problem is related to alert handling: Alert handling is disabled
for chips with broken alert after an alert was reported, but only
re-enabled if attributes are read by the user. This means that alert
conditions may appear and disappear unnoticed. Remedy the situation
by introducing a worker to periodically read the status register(s) while
alert handling is disabled, and re-enable alerts after the alert condition
clears.
Yet another problem is that sysfs and udev events are currently only
reported to userspace if an alarm is raised, but not if an alarm condition
clears. Use the new worker to detect that situation and also generate
sysfs and udev events in that case.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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So far the driver only generated sysfs and udev events for minimum and
maximum alarms. Also generate events for critical and emergency alarms.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Enabling and disabling PEC for PMBus devices is currently only supported
with a debugfs attribute, which requires debugfs to be enabled and is
thus less than perfect. Take the lm90 driver as example and add a 'pec'
attribute to the I2C device if both the I2C adapter and the PMBus device
support it. Remove the now obsolete 'pec' attribute from debugfs.
Cc: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fix from Vishal Verma:
- Fix a bug in the libnvdimm 'BTT' (Block Translation Table) driver
where accounting for poison blocks to be cleared was off by one,
causing a failure to clear the the last badblock in an nvdimm region.
* tag 'libnvdimm-fixes-5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
nvdimm: Fix badblocks clear off-by-one error
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull thermal control fix from Rafael Wysocki:
"Add a new CPU ID to the list of supported processors in the
intel_tcc_cooling driver (Sumeet Pawnikar)"
* tag 'thermal-5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: intel_tcc_cooling: Add TCC cooling support for RaptorLake
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix some issues in cpufreq drivers and some issues in devfreq:
- Fix error code path issues related PROBE_DEFER handling in devfreq
(Christian Marangi)
- Revert an editing accident in SPDX-License line in the devfreq
passive governor (Lukas Bulwahn)
- Fix refcount leak in of_get_devfreq_events() in the exynos-ppmu
devfreq driver (Miaoqian Lin)
- Use HZ_PER_KHZ macro in the passive devfreq governor (Yicong Yang)
- Fix missing of_node_put for qoriq and pmac32 driver (Liang He)
- Fix issues around throttle interrupt for qcom driver (Stephen Boyd)
- Add MT8186 to cpufreq-dt-platdev blocklist (AngeloGioacchino Del
Regno)
- Make amd-pstate enable CPPC on resume from S3 (Jinzhou Su)"
* tag 'pm-5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / devfreq: passive: revert an editing accident in SPDX-License line
PM / devfreq: Fix kernel warning with cpufreq passive register fail
PM / devfreq: Rework freq_table to be local to devfreq struct
PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events
PM / devfreq: passive: Use HZ_PER_KHZ macro in units.h
PM / devfreq: Fix cpufreq passive unregister erroring on PROBE_DEFER
PM / devfreq: Mute warning on governor PROBE_DEFER
PM / devfreq: Fix kernel panic with cpu based scaling to passive gov
cpufreq: Add MT8186 to cpufreq-dt-platdev blocklist
cpufreq: pmac32-cpufreq: Fix refcount leak bug
cpufreq: qcom-hw: Don't do lmh things without a throttle interrupt
drivers: cpufreq: Add missing of_node_put() in qoriq-cpufreq.c
cpufreq: amd-pstate: Add resume and suspend callbacks
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Merge cpufreq fixes for 5.19-rc5, including ARM cpufreq fixes and the
following one:
- Make amd-pstate enable CPPC on resume from S3 (Jinzhou Su).
* pm-cpufreq:
cpufreq: Add MT8186 to cpufreq-dt-platdev blocklist
cpufreq: pmac32-cpufreq: Fix refcount leak bug
cpufreq: qcom-hw: Don't do lmh things without a throttle interrupt
drivers: cpufreq: Add missing of_node_put() in qoriq-cpufreq.c
cpufreq: amd-pstate: Add resume and suspend callbacks
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Fix error handling in ibmaem driver initialization
- Fix bad data reported by occ driver after setting power cap
- Fix typos in pmbus/ucd9200 driver comments
* tag 'hwmon-for-v5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (ibmaem) don't call platform_device_del() if platform_device_add() fails
hwmon: (pmbus/ucd9200) fix typos in comments
hwmon: (occ) Prevent power cap command overwriting poll response
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If platform_device_add() fails, it no need to call platform_device_del(), split
platform_device_unregister() into platform_device_del/put(), so platform_device_put()
can be called separately.
Fixes: 8808a793f052 ("ibmaem: new driver for power/energy/temp meters in IBM System X hardware")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220701074153.4021556-1-yangyingliang@huawei.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Alexander Gordeev:
- Fix purgatory build process so bin2c tool does not get built
unnecessarily and the Makefile is more consistent with other
architectures.
- Return earlier simple design of arch_get_random_seed_long|int() and
arch_get_random_long|int() callbacks as result of changes in generic
RNG code.
- Fix minor comment typos and spelling mistakes.
* tag 's390-5.19-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/qdio: Fix spelling mistake
s390/sclp: Fix typo in comments
s390/archrandom: simplify back to earlier design and initialize earlier
s390/purgatory: remove duplicated build rule of kexec-purgatory.o
s390/purgatory: hard-code obj-y in Makefile
s390: remove unneeded 'select BUILD_BIN2C'
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git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
"Three fixes for invalid memory accesses discovered by using KASAN
while running the lvm2 testsuite's dm-raid tests. Includes changes to
MD's raid5.c given the dependency dm-raid has on the MD code"
* tag 'for-5.19/dm-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm raid: fix KASAN warning in raid5_add_disks
dm raid: fix KASAN warning in raid5_remove_disk
dm raid: fix accesses beyond end of raid member array
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Pull block fixes from Jens Axboe:
- Fix for batch getting of tags in sbitmap (wuchi)
- NVMe pull request via Christoph:
- More quirks (Lamarque Vieira Souza, Pablo Greco)
- Fix a fabrics disconnect regression (Ruozhu Li)
- Fix a nvmet-tcp data_digest calculation regression (Sagi
Grimberg)
- Fix nvme-tcp send failure handling (Sagi Grimberg)
- Fix a regression with nvmet-loop and passthrough controllers
(Alan Adamson)
* tag 'block-5.19-2022-07-01' of git://git.kernel.dk/linux-block:
nvme-pci: add NVME_QUIRK_BOGUS_NID for ADATA IM2P33F8ABR1
nvmet: add a clear_ids attribute for passthru targets
nvme: fix regression when disconnect a recovering ctrl
nvme-pci: add NVME_QUIRK_BOGUS_NID for ADATA XPG SX6000LNP (AKA SPECTRIX S40G)
nvme-tcp: always fail a request when sending it failed
nvmet-tcp: fix regression in data_digest calculation
lib/sbitmap: Fix invalid loop in __sbitmap_queue_get_batch()
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