mtd: rawnand: ams-delta: Write protect device during probe

	platform_set_drvdata(pdev, priv);

	/* Set chip enabled, but  */

	priv->gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_HIGH);

	/* Set chip enabled but write protected */

	priv->gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_LOW);

	if (IS_ERR(priv->gpiod_nwp)) {

		err = PTR_ERR(priv->gpiod_nwp);

		dev_err(&pdev->dev, "NWP GPIO request failed (%d)\n", err);

	nand_controller_init(&priv->base);

	this->controller = &priv->base;

	/*

	 * FIXME: We should release write protection only after nand_scan() to

	 * be on the safe side but we can't do that until we have a generic way

	 * to assert/deassert WP from the core.  Even if the core shouldn't

	 * write things in the nand_scan() path, it should have control on this

	 * pin just in case we ever need to disable write protection during

	 * chip detection/initialization.

	 */

	/* Release write protection */

	gpiod_set_value(priv->gpiod_nwp, 1);

	/* Scan to find existence of the device */

	err = nand_scan(this, 1);

	if (err)

	struct ams_delta_nand *priv = platform_get_drvdata(pdev);

	struct mtd_info *mtd = nand_to_mtd(&priv->nand_chip);

	/* Apply write protection */

	gpiod_set_value(priv->gpiod_nwp, 0);

	/* Unregister device */

	nand_release(mtd_to_nand(mtd));