linux-kernel - Re: [PATCH v32 2/6] leds: lp50xx: Add the LP50XX family of the RGB LED driver

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Date:   Tue, 11 Aug 2020 17:16:36 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Pavel Machek <pavel@....cz>
CC:     <jacek.anaszewski@...il.com>, <robh@...nel.org>,
        <marek.behun@....cz>, <devicetree@...r.kernel.org>,
        <linux-leds@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v32 2/6] leds: lp50xx: Add the LP50XX family of the RGB
 LED driver

Pavel

On 8/11/20 5:01 PM, Pavel Machek wrote:
> Hi!
>
>>> Actually... This is quite impressive ammount of code to
>>> zero-initialize few registers. Could the regmap be told to set the
>>> range to zero, or use loops to reduce ammount of code?
>> I am not aware of any regmap calls that will set a range of registers to a
>> certain value.
>>
>> Well it depends on where we want to create the default cache values.
>>
>> Either we run through a for..loop during driver probe and delay device start
>> up or we keep the simple arrays and increase the driver total size.
> for loop will be better.
>
> Plus, REGCACHE_RBTREE is very likely overkill.

Well if I eliminate the reg_cache then I can eliminate the defaults too.

Dan

> Best regards,
>
> 									Pavel