linux-kernel - Re: [alsa-devel] [PATCH v2 3/3] ASoC: TDA7802: Add turn-on diagnostic routine

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Message-ID: <99b80b21-fdb4-085f-3380-7df4700bb0ff@codethink.co.uk>
Date:   Tue, 30 Jul 2019 16:27:32 +0100
From:   Thomas Preston <thomas.preston@...ethink.co.uk>
To:     Mark Brown <broonie@...nel.org>
Cc:     Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
        alsa-devel@...a-project.org,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Kirill Marinushkin <kmarinushkin@...dec.tech>,
        Liam Girdwood <lgirdwood@...il.com>,
        Takashi Iwai <tiwai@...e.com>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Annaliese McDermond <nh6z@...z.net>,
        linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Jerome Brunet <jbrunet@...libre.com>,
        Cheng-Yi Chiang <cychiang@...omium.org>
Subject: Re: [alsa-devel] [PATCH v2 3/3] ASoC: TDA7802: Add turn-on diagnostic
 routine

On 30/07/2019 15:20, Mark Brown wrote:
> On Tue, Jul 30, 2019 at 03:04:19PM +0100, Thomas Preston wrote:
>> On 30/07/2019 13:41, Charles Keepax wrote:
> 
>>> This could probably be removed using regmap_multi_reg_write.
> 
>> The problem is that I want to retain the state of the other bits in those
>> registers. Maybe I should make a copy of the backed up state, set the bits
>> I want to off-device, then either:
> 
>> 1. Write the changes with regmap_multi_reg_write
>> 2. Write all six regs again (if my device doesn't support the multi_reg)
> 
> Or make this a regmap function, there's nothing device specific about
> it.
> 

I did wonder why regmap didn't have an multi-update function. If appropriate,
I will add this in.