linux-kernel - Re: [PATCH 08/13] regulator: max77650: add regulator support

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Message-ID: <20190118180148.GD6260@sirena.org.uk>
Date:   Fri, 18 Jan 2019 18:01:48 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Lee Jones <lee.jones@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-input@...r.kernel.org,
        linux-leds@...r.kernel.org, linux-pm@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 08/13] regulator: max77650: add regulator support

On Fri, Jan 18, 2019 at 02:42:39PM +0100, Bartosz Golaszewski wrote:

> Add regulator support for max77650. We support all four variants of this
> PMIC including non-linear voltage table for max77651 SBB1 rail.

Looks good, the ramping stuff might be a candidate for core (TBH I was
sure we'd got that implemented already but we don't seem to) but that
can be done later and the more complex one with non-linear steps does
feel like it might have to stay in the driver anyway.

A couple of small nits:

> +++ b/drivers/regulator/max77650-regulator.c
> @@ -0,0 +1,537 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2018 BayLibre SAS
> + * Author: Bartosz Golaszewski <bgolaszewski@...libre.com>

Please make the entire header C++ style so it looks more intentional.

> +		for_each_child_of_node(dev->of_node, child) {
> +			if (!of_node_name_eq(child, rdesc->desc.name))
> +				continue;
> +
> +			init_data = of_get_regulator_init_data(dev, child,
> +							       &rdesc->desc);
> +			if (!init_data)
> +				return -ENOMEM;
> +
> +			config.of_node = child;
> +			config.init_data = init_data;
> +		}

You don't need to do this, the core will do it for you (it will actually
still do it even with the above, it'll only fall back to using
config->init_data if it's own lookup fails).

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