linux-kernel - Re: [PATCH v2 3/3] ASoC: fsl_easrc: Add EASRC ASoC CPU DAI and platform drivers

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Message-ID: <20200226025540.GA22445@Asurada-Nvidia.nvidia.com>
Date:   Tue, 25 Feb 2020 18:55:40 -0800
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     Shengjiu Wang <shengjiu.wang@...il.com>
Cc:     "S.j. Wang" <shengjiu.wang@....com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "timur@...nel.org" <timur@...nel.org>,
        "Xiubo.Lee@...il.com" <Xiubo.Lee@...il.com>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "festevam@...il.com" <festevam@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] ASoC: fsl_easrc: Add EASRC ASoC CPU DAI and
 platform drivers

On Wed, Feb 26, 2020 at 09:51:39AM +0800, Shengjiu Wang wrote:
> > > > > +static const struct regmap_config fsl_easrc_regmap_config = {
> > > > > +     .readable_reg = fsl_easrc_readable_reg,
> > > > > +     .volatile_reg = fsl_easrc_volatile_reg,
> > > > > +     .writeable_reg = fsl_easrc_writeable_reg,
> > > >
> > > > Can we use regmap_range and regmap_access_table?
> > > >
> > >
> > > Can the regmap_range support discontinuous registers?  The
> > > reg_stride = 4.
> >
> > I think it does. Giving an example here:
> > https://github.com/torvalds/linux/blob/master/drivers/mfd/da9063-i2c.c
> 
> The register in this i2c driver are continuous,  from 0x00, 0x01, 0x02...
> 
> But our case is 0x00, 0x04, 0x08, does it work?

Ah...I see your point now. I am not very sure -- have only used
in I2C drivers. You can ignore if it doesn't likely work for us.