linux-kernel - Re: [PATCH 05/10] mfd: rt5033: Apply preparatory changes before adding rt5033-charger driver

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Message-ID: <9ce4110c-eaff-3f8b-65da-8407e05af493@rocketmail.com>
Date:   Sun, 5 Mar 2023 17:14:19 +0100
From:   Jakob Hauser <jahau@...ketmail.com>
To:     Lee Jones <lee@...nel.org>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Beomho Seo <beomho.seo@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Stephan Gerhold <stephan@...hold.net>,
        Raymond Hackley <raymondhackley@...tonmail.com>,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH 05/10] mfd: rt5033: Apply preparatory changes before
 adding rt5033-charger driver

Hi Lee,

On 05.03.23 11:55, Lee Jones wrote:
> On Tue, 28 Feb 2023, Jakob Hauser wrote:
> 
>> Order the register blocks to have the masks in descending manner.
>>
>> Add new defines for constant voltage shift (RT5033_CHGCTRL2_CV_SHIFT),
>> MIVR mask (RT5033_CHGCTRL4_MIVR_MASK), pre-charge current shift
>> (RT5033_CHGCTRL4_IPREC_SHIFT), internal timer disable
>> (RT5033_INT_TIMER_DISABLE), termination disable (RT5033_TE_DISABLE),
>> CFO disable (RT5033_CFO_DISABLE), UUG disable (RT5033_CHARGER_UUG_DISABLE).
>>
>> The fast charge timer type needs to be written on mask 0x38
>> (RT5033_CHGCTRL3_TIMER_MASK). To avoid a bit shift on application, change the
>> values of the timer types to fit the mask. Added the timout duration as a
>> comment. And the timer between TIMER8 and TIMER12 is most likely TIMER10, see
>> e.g. RT5036 [1] page 28 bottom.
>>
>> Add value options for MIVR (Minimum Input Voltage Regulation).
>>
>> Move RT5033_TE_ENABLE_MASK to the block "RT5033 CHGCTRL1 register", in order
>> to have the masks of the register collected there. To fit the naming scheme,
>> rename it to RT5033_CHGCTRL1_TE_EN_MASK.
>>
>> Move RT5033_CHG_MAX_CURRENT to the block "RT5033 charger fast-charge current".
>>
>> Add new defines RT5033_CV_MAX_VOLTAGE and RT5033_CHG_MAX_PRE_CURRENT to the
>> blocks "RT5033 charger constant charge voltage" and "RT5033 charger pre-charge
>> current limits".
>>
>> In include/linux/mfd/rt5033.h, turn power_supply "psy" into a pointer in order
>> to use it in devm_power_supply_register().
> 
> Are there no present users to account for?

At least none I'm aware of. Within the upstream kernel the 
rt5033_charger power_supply didn't exist so far, the patchset is about 
to implement it.

>> [1] https://media.digikey.com/pdf/Data%20Sheets/Richtek%20PDF/RT5036%20%20Preliminary.pdf
>>
>> Signed-off-by: Jakob Hauser <jahau@...ketmail.com>
>> ---
>>   include/linux/mfd/rt5033-private.h | 53 ++++++++++++++++++++----------
>>   include/linux/mfd/rt5033.h         |  2 +-
>>   2 files changed, 36 insertions(+),` 19 deletions(-)
> 

Kind regards,
Jakob