linux-kernel - Re: [PATCH v5 11/11] i2c: designware: Add Baikal-T1 System I2C support

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Date:   Wed, 27 May 2020 19:10:45 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
CC:     Serge Semin <fancer.lancer@...il.com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Rob Herring <robh+dt@...nel.org>, <linux-mips@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-i2c@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 11/11] i2c: designware: Add Baikal-T1 System I2C
 support

On Wed, May 27, 2020 at 07:05:44PM +0300, Andy Shevchenko wrote:
> On Wed, May 27, 2020 at 06:30:46PM +0300, Serge Semin wrote:
> > Baikal-T1 System Controller is equipped with a dedicated I2C Controller
> > which functionality is based on the DW APB I2C IP-core, the only
> > difference in a way it' registers are accessed. There are three access
> > register provided in the System Controller registers map, which indirectly
> > address the normal DW APB I2C registers space. So in order to have the
> > Baikal-T1 System I2C Controller supported by the common DW APB I2C driver
> > we created a dedicated Dw I2C controller model quirk, which retrieves the
> > syscon regmap from the parental dt node and creates a new regmap based on
> > it.
> 
> ...
> 
> > +static struct regmap_config bt1_i2c_cfg = {
> > +	.reg_bits = 32,
> > +	.val_bits = 32,
> > +	.reg_stride = 4,
> > +	.fast_io = true,
> > +	.reg_read = bt1_i2c_read,
> > +	.reg_write = bt1_i2c_write,
> 
> > +	.max_register = DW_IC_COMP_TYPE
> 
> Perhaps leave comma here.

If v6 is required, I'll fix it there.

-Sergey

> 
> > +};
> 
> -- 
> With Best Regards,
> Andy Shevchenko
> 
>