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Date:   Sun, 3 May 2020 17:48:55 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Tobias Schramm <t.schramm@...jaro.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND v6 0/3] Add support for CellWise cw2015 fuel gauge

Hi,

On Tue, Apr 14, 2020 at 02:52:05PM +0200, Tobias Schramm wrote:
> This patchset adds support for the CellWise cw2015 fuel gauge.
> 
> The CellWise cw2015 fuel gauge is a shuntless, single-cell Li-Ion fuel
> gauge. It is used in the pine64 Pinebook Pro laptop.
> 
> This is just a resend of v6 to the linux-pm maintainers for merging.
> 
> I've kept the cellwise,battery-profile property in the device tree. Its
> content describes characteristics of the battery built into a device. The
> exact format is unknown and not publicly documented. It is likely
> comprised of some key parameters of the battery (chemistry, voltages,
> design capacity) and parameters for tuning the internal state of charge
> approximation function.
> Since v2 CellWise has confirmed to me that the only way to obtain the
> profile blob is to mail them batteries for testing. Thus we will need to
> keep that property.

Thanks, queued.

> In general I'm not 100 % sure about my json-schema binding for the gauge.
> It is my first time ever writing a json-schema binding and I'm not sure
> whether properties like power-supplies or monitored-battery need to be
> added to a separate, common schema for power supplies or not.

Yes, they should be referenced, but at the time of your patch the
common power-supply properties and the battery bindings have not
yet been converted to YAML. The power-supplies property is now
described in Documentation/devicetree/bindings/power/supply/power-supply.yaml
and conversion of the simple-battery binding will hopefully happen
soon. Afterwards we can update the cw2015 binding accordingly.

-- Sebastian

> Best Regards,
> 
> Tobias Schramm
> 
> Changelog:
>  v2:
>   * Change subject to "Add support for CellWise cw2015 fuel gauge"
>   * Rewrite bindings as json-schema
>   * Use default power-supplies handling
>   * Use regmap for register access
>   * Use standard simple-battery node
>   * Replace printk/pr_* by dev_{dbg,info,warn,err}
>   * Use cancel_delayed_work_sync in remove
>   * General code cleanup
>  v3:
>   * Incorporate review by Andy
>   * Add cellwise vendor prefix
>   * Rename cellwise,bat-config-info property to cellwise,battery-profile
>   * Remove most state of charge post-processing
>   * Use fwnode interface
>   * General code cleanup
>   * Lots of code style fixes
>  v4:
>   * Implement additional changes requested by Andy
>   * Use fwnode inline wrappers
>   * Clean up waiting for gauge
>   * Minor code style fixes
>  v5:
>   * Clean up includes
>   * Handle errors during device property parsing
>   * Refactor device property parsing
>   * Replace i2c->probe by i2c->probe_new 
>   * More code style fixes
>  v6:
>   * Fix bindings according to review by Rob
> 
> Tobias Schramm (3):
>   dt-bindings: Document cellwise vendor-prefix
>   dt-bindings: power: supply: add cw2015_battery bindings
>   power: supply: add CellWise cw2015 fuel gauge driver
> 
>  .../bindings/power/supply/cw2015_battery.yaml |  82 ++
>  .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
>  MAINTAINERS                                   |   6 +
>  drivers/power/supply/Kconfig                  |  11 +
>  drivers/power/supply/Makefile                 |   1 +
>  drivers/power/supply/cw2015_battery.c         | 749 ++++++++++++++++++
>  6 files changed, 851 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/supply/cw2015_battery.yaml
>  create mode 100644 drivers/power/supply/cw2015_battery.c
> 
> -- 
> 2.26.0
> 

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