linux-kernel - Re: [PATCH] gpio: regmap: move struct gpio

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Date:   Tue, 2 Mar 2021 20:52:24 +0100
From:   Álvaro Fernández Rojas <noltari@...il.com>
To:     Michael Walle <michael@...le.cc>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpio: regmap: move struct gpio_regmap definition

Hi Michael,

El 02/03/2021 a las 20:24, Michael Walle escribió:
> Hi,
> 
> Am 2021-03-02 19:14, schrieb Álvaro Fernández Rojas:
>> El 02/03/2021 a las 19:10, Michael Walle escribió:
>>> Am 2021-03-02 19:06, schrieb Álvaro Fernández Rojas:
>>>> struct gpio_regmap should be declared in gpio/regmap.h.
>>>> This way other drivers can access the structure data when 
>>>> registering a gpio
>>>> regmap controller.
>>>
>>> The intention was really to keep this private to the gpio-regmap
>>> driver. Why do you need to access to the properties?
>>
>> I'm trying to add support for bcm63xx pin controllers, and Linus
>> suggested that I could use gpio regmap instead of adding duplicated
>> code.
> 
> nice!
> 
>> However, I need to access gpio_chip inside gpio_regmap to call
>> pinctrl_add_gpio_range() with gpio_chip.base.
> 
> Can't we add something to gpio-regmap.c which will (1) either call
> pinctrl_add_gpio_range(), just (2) return the struct gpio_chip* or
> (3) even only gpio_chip.base?

Sure, I'm OK with any way of doing it, so it's up to you and Linus :)

> 
> I don't know how many sense (1) make and how reusable that code would
> be for other drivers, though. Linus?
> 
> -michael

Best regards,
Álvaro.