linux-kernel - Re: [PATCH v2 1/1] gpio: mpfs: add polarfire soc gpio support

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Date:   Wed, 13 Jul 2022 17:44:17 +0000
From:   <Conor.Dooley@...rochip.com>
To:     <andy.shevchenko@...il.com>, <Lewis.Hanly@...rochip.com>
CC:     <linux-gpio@...r.kernel.org>, <linux-riscv@...ts.infradead.org>,
        <linus.walleij@...aro.org>, <brgl@...ev.pl>,
        <linux-kernel@...r.kernel.org>, <palmer@...belt.com>,
        <maz@...nel.org>, <Daire.McNamara@...rochip.com>
Subject: Re: [PATCH v2 1/1] gpio: mpfs: add polarfire soc gpio support

On 13/07/2022 12:59, Andy Shevchenko wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> 
> Below my comments, I have tried hard not to duplicate what Conor
> already mentioned. So consider this as additional part.
> 

>> +#define NUM_GPIO                       32
>> +#define BYTE_BOUNDARY                  0x04
> 
> Without namespace?

Does byte_boundary even need to be defined?
is incrementing an address by 0x4 not kinda obvious on its own
as to what it is doing?

>> +       if (gpio_cfg & MPFS_GPIO_EN_IN)
>> +               return 1;
>> +
>> +       return 0;
> 
> Don't we have specific definitions for the directions?

FWIW Lewis, they're GPIO_LINE_DIRECTION_IN & GPIO_LINE_DIRECTION_OUT
I thought something like this would surely exist but wasn't sure.
Thanks for pointing it out Andy.

Conor.