linux-kernel - Re: [PATCH v4 8/8] mtd: maps: gpio-addr-flash: Add support for device-tree devices

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Date:   Wed, 3 Oct 2018 19:01:30 +0200
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Zhouyang Jia <jiazhouyang09@...il.com>,
        linux-mtd@...ts.infradead.org,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 8/8] mtd: maps: gpio-addr-flash: Add support for
 device-tree devices

On Mon,  1 Oct 2018 14:43:51 +0200
Ricardo Ribalda Delgado <ricardo.ribalda@...il.com> wrote:

> +static int gpio_flash_probe_gpios(struct platform_device *pdev,
> +				  struct async_state *state)
> +{
> +	struct physmap_flash_data *pdata;
> +	struct device_node *dn;
> +	struct resource *gpios = NULL;
> +	int i;
> +
> +	dn = pdev->dev.of_node;
> +	if (dn) {
> +		state->gpios = devm_gpiod_get_array(&pdev->dev, NULL,
> +						    GPIOD_OUT_LOW);

Did you consider using gpiod_set_array_value() to update the gpio vals
instead of having your own update loop (the for loop in the
gf_set_gpios() func)?