linux-kernel - Re: [PATCH v2 4/4] mfd: max77620: add documentation for low battery monitoring

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Message-ID: <D4E89A2D-2372-4328-92BD-5B1CF923951D@gmail.com>
Date:   Thu, 31 Jan 2019 21:37:46 +0000
From:   Billy laws <blaws05@...il.com>
To:     Rob Herring <robh@...nel.org>, Mark Zhang <markz@...dia.com>
CC:     Lee Jones <lee.jones@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH v2 4/4] mfd: max77620: add documentation for low battery monitoring



On 31 January 2019 21:05:46 GMT, Rob Herring <robh@...nel.org> wrote:
>On Wed, Jan 30, 2019 at 8:29 PM Mark Zhang <markz@...dia.com> wrote:
>>
>> On 1/31/2019 3:53 AM, Rob Herring wrote:
>> > On Tue, Jan 29, 2019 at 04:55:31PM +0800, Mark Zhang wrote:
>> >> Adding documentation for low battery monitor properties:
>> >> - maxim,low-battery-dac-enable
>> >> - maxim,low-battery-dac-disable
>> >> - maxim,low-battery-shutdown-enable
>> >> - maxim,low-battery-shutdown-disable
>> >> - maxim,low-battery-reset-enable
>> >> - maxim,low-battery-reset-disable
>> >>
>> >> Signed-off-by: Mark Zhang <markz@...dia.com>
>> >> ---
>> >>  Documentation/devicetree/bindings/mfd/max77620.txt | 14
>++++++++++++++
>> >>  1 file changed, 14 insertions(+)
>> >>
>> >> diff --git a/Documentation/devicetree/bindings/mfd/max77620.txt
>b/Documentation/devicetree/bindings/mfd/max77620.txt
>> >> index 484b17e4fba5..5fed0a463b80 100644
>> >> --- a/Documentation/devicetree/bindings/mfd/max77620.txt
>> >> +++ b/Documentation/devicetree/bindings/mfd/max77620.txt
>> >> @@ -142,6 +142,20 @@ Optional properties:
>> >>                      Device supports 100/1000/3000/6000 Ohms.
>> >>                      Default will be set to 1000 Ohm.
>> >>
>> >> +Low-Battery Monitor:
>> >> +==================
>> >> +This sub-node configure low battery monitor configuration
>registers. Device has
>> >> +support for low-battery monitor configuration through child DT
>node
>> >> +"low-battery-monitor".
>
>Missed this the first time, but there's not really any reason for
>these to be in a child node.
>
>> >> +
>> >> +Optional properties:
>> >> +    - maxim,low-battery-dac-enable: Enable low battery DAC.
>> >> +    - maxim,low-battery-dac-disable: Disable low battery DAC.
>> >> +    - maxim,low-battery-shutdown-enable: Enable low battery
>shutdown.
>> >> +    - maxim,low-battery-shutdown-disable: Disable low battery
>shutdown.
>> >> +    - maxim,low-battery-reset-enable: Enable low battery reset.
>> >> +    - maxim,low-battery-reset-disable: Disable low battery reset.
>> >
>> > Do you really need 3 states with the 3rd being prop not present.
>>
>> Yeah, so I think we can just keep 3 of them and shorten the names a
>little bit
>> (lbm stands for "low battery monitoring"):
>> - maxim,lbm-dac-enable
>> - maxim,lbm-shutdown-enable
>> - maxim,lbm-reset-enable
>>
>> Does this look good to you?
>
>Yes. However, are these 3 mutually exclusive? If so, then perhaps
>'maxim,low-battery-mode = "<dac|shutdown|reset>"'?
I agree, would also allow the addition of the voltage cut off point configuration by just adding more defines.(current forces 3.something v cutoff)
>
>Rob