linux-kernel - Re: [PATCH v5 7/8] i2c: iproc: add NIC I2C support

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Date:   Tue, 2 Apr 2019 10:57:33 -0700
From:   Ray Jui <ray.jui@...adcom.com>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
Subject: Re: [PATCH v5 7/8] i2c: iproc: add NIC I2C support



On 4/2/2019 3:27 AM, Wolfram Sang wrote:
> 
>> +#define IDM_CTRL_DIRECT_OFFSET       0x00
> 
> And this IDM thing is also never used outside of the I2C context? In
> other words, it also doesn't need a seperate DT node?
> 
> 

That is correct. Only in the I2C context in our use case.

>> +	/* indicates no slave mode support */
>> +	bool no_slave;
> 
> I would suggest to not use a flag, but to nullify the {un}reg_slave
> callbacks in probe depending on the type. That will also tell the
> i2c-core that slave functionality is not supported. And you can use if
> (!algo->reg_slave) as a flag, too.
> 

Yes. Great idea. I'll make the change and remove reg_slave.

>> +	iproc_i2c->type =
>> +		(enum bcm_iproc_i2c_type) of_device_get_match_data(&pdev->dev);
> 
> No need to cast a void*.
> 

Yes will fix.

Thanks,

Ray