Commit e13f5b7a authored by Saravana Kannan's avatar Saravana Kannan Committed by Greg Kroah-Hartman
Browse files

of: property: Add fw_devlink support for "gpio" and "gpios" binding 



To provide backward compatibility for boards that use deprecated DT
bindings, we need to add fw_devlink support for "gpio" and "gpios".

We also need to ignore these properties on nodes with "gpio-hog"
property because their gpio[s] are all supplied by the parent node.

Fixes: e5904747 ("driver core: Set fw_devlink=on by default")
Cc: linux-tegra <linux-tegra@vger.kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: default avatarJon Hunter <jonathanh@nvidia.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Reviewed-by: default avatarThierry Reding <treding@nvidia.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarSaravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20210121225712.1118239-2-saravanak@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 072a51be

drivers/of/property.c

+23 −0
Original line number Diff line number Diff line
@@ -1271,6 +1271,28 @@ static struct device_node *parse_iommu_maps(struct device_node *np, 
	return of_parse_phandle(np, prop_name, (index * 4) + 1);

}



static struct device_node *parse_gpio_compat(struct device_node *np,

					     const char *prop_name, int index)

{

	struct of_phandle_args sup_args;



	if (strcmp(prop_name, "gpio") && strcmp(prop_name, "gpios"))

		return NULL;



	/*

	 * Ignore node with gpio-hog property since its gpios are all provided

	 * by its parent.

	 */

	if (of_find_property(np, "gpio-hog", NULL))

		return NULL;



	if (of_parse_phandle_with_args(np, prop_name, "#gpio-cells", index,

				       &sup_args))

		return NULL;



	return sup_args.np;

}



static const struct supplier_bindings of_supplier_bindings[] = {

	{ .parse_prop = parse_clocks, },

	{ .parse_prop = parse_interconnects, },
@@ -1296,6 +1318,7 @@ static const struct supplier_bindings of_supplier_bindings[] = { 
	{ .parse_prop = parse_pinctrl6, },

	{ .parse_prop = parse_pinctrl7, },

	{ .parse_prop = parse_pinctrl8, },

	{ .parse_prop = parse_gpio_compat, },

	{ .parse_prop = parse_regulators, },

	{ .parse_prop = parse_gpio, },

	{ .parse_prop = parse_gpios, },