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

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Date:   Fri, 10 Jul 2020 11:03:21 +0000
From:   Fei1 Jiang 蒋飞 <jiangfei1@...omi.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Qiwu Huang <yanziily@...il.com>
CC:     "sre@...nel.org" <sre@...nel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        黄其武 <huangqiwu@...omi.com>
Subject: 答复: [External Mail]Re: [PATCH 3/5] power: supply: core: add wireless signal strength property

Hi Greg,

/sys/class/power_supply/<supply_name>/signal_strength
What units are this in?  The "value" means what?

--> Unit is KHZ, the return value is also integer, the "value" means the working frequency of receiver chip of wireless charging.

B&R
Fei Jiang

-----邮件原件-----
发件人: Greg KH <gregkh@...uxfoundation.org>
发送时间: 2020年7月10日 18:01
收件人: Qiwu Huang <yanziily@...il.com>
抄送: sre@...nel.org; linux-pm@...r.kernel.org; linux-kernel@...r.kernel.org; Fei1 Jiang 蒋飞 <jiangfei1@...omi.com>; 黄其武 <huangqiwu@...omi.com>
主题: [External Mail]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
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