linux-kernel - Re: [PATCH 3/5] power: supply: core: add wireless signal strength property

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Date:   Fri, 10 Jul 2020 12:01:06 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Qiwu Huang <yanziily@...il.com>
Cc:     sre@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, jiangfei1@...omi.com,
        Qiwu Huang <huangqiwu@...omi.com>
Subject: Re: [PATCH 3/5] power: supply: core: add wireless signal strength
 property

On Fri, Jul 10, 2020 at 04:48:39PM +0800, Qiwu Huang wrote:
> From: Qiwu Huang <huangqiwu@...omi.com>
> 
> reports wireless signal strength.
> The value show degree of coupling between tx and rx.
> 
> Signed-off-by: Qiwu Huang <huangqiwu@...omi.com>
> ---
>  Documentation/ABI/testing/sysfs-class-power | 9 ++++++++-
>  drivers/power/supply/power_supply_sysfs.c   | 1 +
>  include/linux/power_supply.h                | 1 +
>  3 files changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
> index 2099cf194a89..1f42aa0c071e 100644
> --- a/Documentation/ABI/testing/sysfs-class-power
> +++ b/Documentation/ABI/testing/sysfs-class-power
> @@ -730,4 +730,11 @@ Description:
>  
>  		Access: Read-Only
>  		Valid values: "ADAPTER_NONE", "ADAPTER_SDP", "ADAPTER_DCP", "ADAPTER_CDP",
> -		"ADAPTER_QC2", "ADAPTER_QC3", "ADAPTER_PD" or other private adapter.
> \ No newline at end of file
> +		"ADAPTER_QC2", "ADAPTER_QC3", "ADAPTER_PD" or other private adapter.
> +
> +What:		/sys/class/power_supply/<supply_name>/signal_strength
> +Date:		Jul 2020
> +Contact:	Fei Jiang <jiangfei1@...omi.com>
> +Description:
> +		Reports wireless signal strength.
> +		The value show degree of coupling.

What units are this in?  The "value" means what?

thanks,

greg k-h