Commit aa1fdda8 authored May 18, 2018 by Heiko Stuebner Committed by Linus Walleij May 23, 2018

gpio: syscon: allow fetching syscon from parent node



Syscon nodes can be a simple-mfd and the syscon-users then be declared
as children of this node. That way the parent-child structure can be
better represented for devices that are fully embedded in the syscon.

Therefore allow getting the syscon from the parent if neither
a special compatible nor a gpio,syscon-dev property is defined.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Levin Du <djw@t-chip.com.cn>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

parent c65ef0ce

drivers/gpio/gpio-syscon.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -200,6 +200,8 @@ static int syscon_gpio_probe(struct platform_device *pdev)
		} else {
		priv->syscon =
		syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev");
		if (IS_ERR(priv->syscon) && np->parent)
		priv->syscon = syscon_node_to_regmap(np->parent);
		if (IS_ERR(priv->syscon))
		return PTR_ERR(priv->syscon);

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