linux-kernel - Re: [PATCH v1 2/2] gpio: ds4520: Add ADI DS4520 Regulator Support

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Date:   Wed, 5 Apr 2023 15:20:43 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     "Sahin, Okan" <Okan.Sahin@...log.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Michael Walle <michael@...le.cc>
Subject: Re: [PATCH v1 2/2] gpio: ds4520: Add ADI DS4520 Regulator Support

On Tue, Apr 4, 2023 at 4:36 PM Sahin, Okan <Okan.Sahin@...log.com> wrote:

> >The driver is pretty straight-forward, but I think this can use the generic
> >GPIO_REGMAP helpers in drivers/gpio/gpio-regmap.c check other drivers selecting
> >this helper library for inspiration.
(..)
> Thank you for your contribution. Should I add select GPIO_REGMAP into Kconfig?

Yes but that is not all, you also need to make use of the library helpers
provided in include/linux/gpio/regmap.h.

Find examples of other drivers doing this by e.g.:
git grep gpio_regmap_register

drivers/gpio/gpio-sl28cpld.c:   return
PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config));
drivers/gpio/gpio-tn48m.c:      return
PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config));
drivers/pinctrl/bcm/pinctrl-bcm63xx.c:  return
PTR_ERR_OR_ZERO(devm_gpio_regmap_register(dev, &grc));

^Look what these are doing

Yours,
Linus Walleij