Re: [PATCH v4 0/3] hwmon: Add Baikal-T1 SoC Process, Voltage and Temp sensor support

[Guenter Roeck]

On Thu, May 28, 2020 at 05:28:02PM +0300, Serge Semin wrote:
> In order to keep track of Baikal-T1 SoC power consumption and make sure
> the chip heating is within the normal temperature limits, there is
> a dedicated hardware monitor sensor embedded into the SoC. It is based
> on the Analog Bits PVT sensor but equipped with a vendor-specific control
> wrapper, which ease an access to the sensors functionality. Fist of all it
> provides an accessed to the sampled Temperature, Voltage and
> Low/Standard/High Voltage thresholds. In addition the wrapper generates
> an interrupt in case if one enabled for alarm thresholds or data ready
> event. All of these functionality is implemented in the Baikal-T1 PVT
> driver submitted within this patchset. Naturally there is also a patch,
> which creates a corresponding yaml-based dt-binding file for the sensor.
> 
> This patchset is rebased and tested on the mainline Linux kernel 5.6-rc4:
> base-commit: 0e698dfa2822 ("Linux 5.7-rc4")
> tag: v5.7-rc4
> 

Series applied to hwmon-next.

Thanks,
Guenter

> Note new vendor prefix for Baikal-T1 PVT device will be added in the
> framework of the next patchset:
> https://lkml.org/lkml/2020/5/6/1047
> 
> Changelog v2:
> - Don't use a multi-arg clock phandle reference in the examples dt-bindings
>   property. Thus reundant include pre-processor statement can be removed.
> - Rearrange the SoBs with adding Maxim' co-development tag.
> - Lowercase the node-name in the dt-schema example.
> - Add dual license header to the dt-bindings file.
> - Replace "additionalProperties: false" property with
>   "unevaluatedProperties: false".
> - Discard label definition from the binding example.
> - Discard handwritten IO-access wrappers. Use normal readl/writel instead.
> - Use generic FIELD_{GET,PREP} macros instead of handwritten ones.
> - Since the driver depends on the OF config we can remove of_match_ptr()
>   macro utilization.
> - Don't print error-message if no platform IRQ found. Just return an error.
> - Remove probe-status info string printout.
> - Our corporate email server doesn't change Message-Id anymore, so the patchset
>   is resubmitted being in the cover-letter-threaded format.
> 
> Link: https://lore.kernel.org/linux-hwmon/20200510103211.27905-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> Changelog v3:
> - Add bt1-pvt into the Documentation/hwmon/index.rst file.
> - Discard explicit "default n" from the SENSORS_BT1_PVT_ALARMS config.
> - Use "depends on SENSORS_BT1_PVT" statement instead of if-endif kbuild
>   config clause.
> - Alphabetically order the include macro operators.
> - Discard unneeded include macro in the header file.
> - Use new generic interface of the hwmon alarms notifications introduced
>   in the first patch (based on hwmon_notify_event()).
> - Add more descriptive information regarding the temp1_trim attribute.
> - Discard setting the platforms device private data by using
>   platform_set_drvdata(). It's redundant since unused in the driver.
> - Pass "pvt" hwmon name instead of dev_name(dev) to
>   devm_hwmon_device_register_with_info().
> - Add "baikal,pvt-temp-trim-millicelsius" temperature trim DT property
>   support.
> - Discard kernel log warnings printed from the ISR when either min or
>   max threshold levels are crossed.
> - Discard CONFIG_OF dependency since there is non at compile-time.
> 
> Link: https://lore.kernel.org/linux-hwmon/20200526133823.20466-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx
> Changelog v4:
> - Rename temp1_trim to the temp1_offset and use the standard API to
>   expose the attribute.
> - Rename "baikal,pvt-temp-trim-millicelsius" DT property to
>   "baikal,pvt-temp-offset-millicelsius".
> - Switch "const static" order to be "static const" where it's applicable.
> - Add missing headers "linux/io.h" and "linux/of.h".
> - Add static qualifier to the pvt_hwmon_write() method, which has been
>   missed there by mistake.
> 
> Co-developed-by: Maxim Kaurkin <maxim.kaurkin@xxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Maxim Kaurkin <Maxim.Kaurkin@xxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
> Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx>
> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@xxxxxxxxxxxxxxxxxxxx>
> Cc: Ramil Zaripov <Ramil.Zaripov@xxxxxxxxxxxxxxxxxxxx>
> Cc: Ekaterina Skachko <Ekaterina.Skachko@xxxxxxxxxxxxxxxxxxxx>
> Cc: Vadim Vlasov <V.Vlasov@xxxxxxxxxxxxxxxxxxxx>
> Cc: Alexey Kolotnikov <Alexey.Kolotnikov@xxxxxxxxxxxxxxxxxxxx>
> Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: linux-mips@xxxxxxxxxxxxxxx
> Cc: linux-hwmon@xxxxxxxxxxxxxxx
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> 
> Guenter Roeck (1):
>   hwmon: Add notification support
> 
> Serge Semin (2):
>   dt-bindings: hwmon: Add Baikal-T1 PVT sensor binding
>   hwmon: Add Baikal-T1 PVT sensor driver
> 
>  .../bindings/hwmon/baikal,bt1-pvt.yaml        |  107 ++
>  Documentation/hwmon/bt1-pvt.rst               |  117 ++
>  Documentation/hwmon/index.rst                 |    1 +
>  drivers/hwmon/Kconfig                         |   25 +
>  drivers/hwmon/Makefile                        |    1 +
>  drivers/hwmon/bt1-pvt.c                       | 1146 +++++++++++++++++
>  drivers/hwmon/bt1-pvt.h                       |  244 ++++
>  drivers/hwmon/hwmon.c                         |   69 +-
>  include/linux/hwmon.h                         |    3 +
>  9 files changed, 1710 insertions(+), 3 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/baikal,bt1-pvt.yaml
>  create mode 100644 Documentation/hwmon/bt1-pvt.rst
>  create mode 100644 drivers/hwmon/bt1-pvt.c
>  create mode 100644 drivers/hwmon/bt1-pvt.h
> 
> -- 
> 2.26.2
>