linux-kernel - Re: [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number

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Date:   Tue, 13 Feb 2018 11:52:59 +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>, Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO
 number

On Mon, Feb 12, 2018 at 02:17:12PM +0100, Linus Walleij wrote:
> Instead of passing a global GPIO number for the enable GPIO, pass
> a descriptor looked up from the device tree node or the board file
> decriptor table for the regulator.
> 
> There is a single board file passing the GPIOs for LDO1 and LDO2
> through platform data, so augment this to pass descriptors
> associated with the i2c device as well.
> 
> Cc: patches@...nsource.cirrus.com
> Cc: Charles Keepax <ckeepax@...nsource.cirrus.com>
> Cc: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> +	/* Look up LDO enable GPIO from the parent device node */
> +	gpiod = devm_gpiod_get_optional(pdev->dev.parent,
> +					id ? "wlf,ldo2ena" : "wlf,ldo1ena",
> +					GPIOD_OUT_LOW);
> +	if (IS_ERR(gpiod))
> +		return PTR_ERR(gpiod);
> +	config.ena_gpiod = gpiod;

Likewise here the DT bindings for these parts have no -gpio
suffix on them so this will break the DT case.

Thanks,
Charles