linux-kernel - Re: [PATCH v5 0/2] Add new ti,no-thermistor property

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Message-ID: <20230508121857.byvuevcx56q4u5ym@mercury.elektranox.org>
Date:   Mon, 8 May 2023 14:18:57 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Hermes Zhang <chenhuiz@...s.com>
Cc:     krzysztof.kozlowski+dt@...aro.org, linux-kernel@...r.kernel.org,
        kernel@...s.com
Subject: Re: [PATCH v5 0/2] Add new ti,no-thermistor property

Hi,

On Thu, May 04, 2023 at 05:30:35PM +0800, Hermes Zhang wrote:
> The TS pin is used to detect the temperature and suspend the charging
> when it's voltage out of range. If the NTC is not connect in HW, the
> TS_IGNORE bit need to be set to 1 to make charge work. The new
> "ti,no-thermistor" is used to set TS_IGNORE to 1 when HW doesn't work
> with NTC.
> 
> Description from datasheet:
> Battery temperature qualification voltage input. Connect a negative temperature
> coefficient thermistor (NTC). Program temperature window with a resistor divider
> from REGN to TS to GND. Charge and Boost mode suspend when TS pin voltage is
> out of range. When TS pin is not used, connect a 10-kΩ resistor from REGN to TS
> and a 10-kΩ resistor from TS to GND or set TS_IGNORE to HIGH to ignore TS pin.
> It is recommended to use a 103AT-2 thermistor.
> 
> Notes:
>     v2: change property name to ti,no-thermistor
> 
>     v3: drop "|" in property description
> 
>     v4: rebase bq256xx_charger.c
> 
>     v5: add Reviewed-by tag from Krzysztof Kozlowski
> 
> Hermes Zhang (2):
>   dt-bindings: power: supply: bq256xx: Add ti,no-thermistor property
>   power: supply: bq256xx: Apply TS_IGNORE from devicetree
> 
>  .../bindings/power/supply/bq256xx.yaml        | 18 ++++++++++++
>  drivers/power/supply/bq256xx_charger.c        | 28 +++++++++++++++++++
>  2 files changed, 46 insertions(+)

Thanks, queued.

-- Sebastian

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