linux-kernel - Re: [PATCH 15/22] mfd: axp20x: add CHRG_CTRL1 to writeable regs for AXP20X/AXP22X

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Date:   Thu, 5 Jan 2017 09:10:35 +0100
From:   Quentin Schulz <quentin.schulz@...e-electrons.com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Jonathan Cameron <jic23@...nel.org>, knaack.h@....de,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sebastian Reichel <sre@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Lee Jones <lee.jones@...aro.org>, linux-iio@...r.kernel.org,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "open list:THERMAL" <linux-pm@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Icenowy Zheng <icenowy@...c.xyz>,
        Bruno Prémont <bonbons@...ux-vserver.org>
Subject: Re: [PATCH 15/22] mfd: axp20x: add CHRG_CTRL1 to writeable regs for
 AXP20X/AXP22X

On 05/01/2017 07:10, Chen-Yu Tsai wrote:
> On Tue, Jan 3, 2017 at 12:37 AM, Quentin Schulz
> <quentin.schulz@...e-electrons.com> wrote:
>> The CHR_CTRL1 register is made of 7 read-write bits with one being used
>> to set the target voltage for battery charging.
> 
> The description is incorrect.
> 
> All 8 bits are read-write:
> 
>   - The highest bit enables the charger module
>   - Bits [6:5] set the target voltage
>   - Bits [4:3] set when the charge cycle ends, based on percentage
>     of charge current
>   - Bits [2:0] set the charge current
> 
> Feel free to use the above in the commit message.
> 

Thanks for the correction.

>>
>> This adds the CHRG_CTRL1 register to the list of writeable registers for
>> AXP20X and AXP22X PMICs.
> 
> You might want to add up to CHRG_CTRL3 for the AXP22x and CHRG_CTRL2
> for the AXP20x. These control additional aspects of the charger.
> 

ACK.

> AXP20X_CHRG_BAK_CTRL controls the charger for the RTC battery. You
> could add this now, or let the person doing the RTC battery driver
> add it.

I'll let the person adding the RTC battery driver add it.

Thanks,
Quentin

-- 
Quentin Schulz, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com