linux-kernel - Re: [PATCH v11 4/4] power: supply: core: property to control reverse charge

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Date:   Thu, 5 Aug 2021 18:37:11 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Ting Wang <zxc52fgh@...il.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, wangting11 <wangting11@...omi.com>
Subject: Re: [PATCH v11 4/4] power: supply: core: property to control reverse
 charge

Hi,

On Wed, Aug 04, 2021 at 07:02:01PM +0800, Ting Wang wrote:
> From: wangting11 <wangting11@...omi.com>
> 
> Interface to control wireless reverse charge.
> 
> Signed-off-by: wangting11 <wangting11@...omi.com>
> ---

In mainline Linux this is handled by registering a regulator, see
e.g. "otg-vbus" regulator in the Qualcomm driver.

-- Sebastian

>  Documentation/ABI/testing/sysfs-class-power | 14 ++++++++++++++
>  drivers/power/supply/power_supply_sysfs.c   |  1 +
>  include/linux/power_supply.h                |  1 +
>  3 files changed, 16 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
> index 4a6b4970cb7d..59518568d594 100644
> --- a/Documentation/ABI/testing/sysfs-class-power
> +++ b/Documentation/ABI/testing/sysfs-class-power
> @@ -807,3 +807,17 @@ Description:
>  
>  		Access: Read-Only
>  		Valid values: 0 - 100
> +
> +What:		/sys/class/power_supply/<supply_name>/reverse_chg_mode
> +Date:		Jul 2020
> +Contact:	Fei Jiang <jiangfei1@...omi.com>
> +Description:
> +		Some devices support wireless reverse charge function which
> +		charge other devices.The property provider interface to
> +		enable/disable wireless reverse charge.If enabled, start TX
> +		mode and detect RX. Disabled when timeout or manual setting.
> +
> +		Access: Read, Write
> +		Valid values:
> +		- 1: enabled
> +		- 0: disabled
> diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
> index 4de91dce2001..934563eed155 100644
> --- a/drivers/power/supply/power_supply_sysfs.c
> +++ b/drivers/power/supply/power_supply_sysfs.c
> @@ -214,6 +214,7 @@ static struct power_supply_attr power_supply_attrs[] = {
>  	POWER_SUPPLY_ATTR(QUICK_CHARGE_TYPE),
>  	POWER_SUPPLY_ATTR(TX_ADAPTER),
>  	POWER_SUPPLY_ATTR(SIGNAL_STRENGTH),
> +	POWER_SUPPLY_ATTR(REVERSE_CHG_MODE),
>  };
>  
>  static struct attribute *
> diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
> index 0dfec19cb473..3fe3f9665389 100644
> --- a/include/linux/power_supply.h
> +++ b/include/linux/power_supply.h
> @@ -174,6 +174,7 @@ enum power_supply_property {
>  	POWER_SUPPLY_PROP_QUICK_CHARGE_TYPE,
>  	POWER_SUPPLY_PROP_TX_ADAPTER,
>  	POWER_SUPPLY_PROP_SIGNAL_STRENGTH,
> +	POWER_SUPPLY_PROP_REVERSE_CHG_MODE,
>  };
>  
>  enum power_supply_type {
> -- 
> 2.17.1
> 

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