linux-kernel - Re: [PATCH 1/1] power: supply: Introduces bypass charging property

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Message-ID: <75DE78A9-572A-46EC-932E-057EFB7F6421@opensource.cirrus.com>
Date:   Wed, 10 Nov 2021 09:52:08 -0600
From:   "Rivera-Matos, Ricardo" <rriveram@...nsource.cirrus.com>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>
CC:     <patches@...nsource.cirrus.com>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] power: supply: Introduces bypass charging property

Hello,

> On Nov 4, 2021, at 9:44 AM, Sebastian Reichel <sebastian.reichel@...labora.com> wrote:
> 
> Hi,
> 
> On Thu, Nov 04, 2021 at 08:50:27AM -0500, Ricardo Rivera-Matos wrote:
>> Adds a POWER_SUPPLY_CHARGE_TYPE_BYPASS option to the POWER_SUPPLY_PROP_CHARGE_TYPE
>> property to facilitate bypass charging operation.
>> 
>> In bypass charging operation, the charger bypasses the charging path around the
>> integrated converter allowing for a "smart" wall adaptor to perform the power
>> conversion externally.
>> 
>> This operational mode is critical for the USB PPS standard of power adaptors and is
>> becoming a common feature in modern charging ICs such as:
>> 
>> - BQ25980
>> - BQ25975
>> - BQ25960
>> - LN8000
>> - LN8410
>> 
>> Signed-off-by: Ricardo Rivera-Matos <rriveram@...nsource.cirrus.com>
>> ---
> 
> Please always send API changes together with a user (e.g. in this
> case you could update bq25980_charger driver to use this property).

Ack, I will send out a v2 patch series with an update to the bq25980_charger driver.
> 
> — Sebastian

Best Regards,
Ricardo
> 
>> drivers/power/supply/power_supply_sysfs.c | 1 +
>> include/linux/power_supply.h              | 1 +
>> 2 files changed, 2 insertions(+)
>> 
>> diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
>> index c3d7cbcd4fad..1368e13dc94b 100644
>> --- a/drivers/power/supply/power_supply_sysfs.c
>> +++ b/drivers/power/supply/power_supply_sysfs.c
>> @@ -89,6 +89,7 @@ static const char * const POWER_SUPPLY_CHARGE_TYPE_TEXT[] = {
>> 	[POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE]	= "Adaptive",
>> 	[POWER_SUPPLY_CHARGE_TYPE_CUSTOM]	= "Custom",
>> 	[POWER_SUPPLY_CHARGE_TYPE_LONGLIFE]	= "Long Life",
>> +	[POWER_SUPPLY_CHARGE_TYPE_BYPASS]	= "Bypass",
>> };
>> 
>> static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
>> diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
>> index 9ca1f120a211..9432234d7900 100644
>> --- a/include/linux/power_supply.h
>> +++ b/include/linux/power_supply.h
>> @@ -49,6 +49,7 @@ enum {
>> 	POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE,	/* dynamically adjusted speed */
>> 	POWER_SUPPLY_CHARGE_TYPE_CUSTOM,	/* use CHARGE_CONTROL_* props */
>> 	POWER_SUPPLY_CHARGE_TYPE_LONGLIFE,	/* slow speed, longer life */
>> +	POWER_SUPPLY_CHARGE_TYPE_BYPASS,	/* bypassing the charger */
>> };
>> 
>> enum {
>> -- 
>> 2.25.1
>>