linux-kernel - Re: [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core

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Date:   Tue, 13 Feb 2018 11:51:22 +0000
From:   Charles Keepax <ckeepax@...nsource.cirrus.com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: Re: [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and
 pass to the core

On Mon, Feb 12, 2018 at 02:17:01PM +0100, Linus Walleij wrote:
> Instead of passing a global GPIO number, pass a descriptor looked
> up with the standard devm_gpiod_get_optional() call.
> 
> We have augmented the GPIO core to look up the regulator special
> GPIO "wlf,ldoena" in a separate patch.
> 
> Cc: patches@...nsource.cirrus.com
> Cc: Richard Fitzgerald <rf@...nsource.cirrus.com>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> -	config.ena_gpio = pdata->ldoena;
> +	/* We assume that high output = regulator off */
> +	config.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "wlf,ldoena",
> +						   GPIOD_OUT_HIGH);
> +	if (IS_ERR(config.ena_gpiod))
> +		return PTR_ERR(config.ena_gpiod);

Also looking at this more you will need to you
devm_gpio_get_from_of_node here since the device tree binding is
for wlf,ldoena not wlf,ldoena-gpio. So this patch currently
breaks the binding.

Thanks,
Charles