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.
Cc: linux-tegra <linux-te...@vger.kernel.org>
Cc: Linus Walleij <linus.wall...@linaro.org>
Cc: Bartosz Golaszewski <bgolaszew...@baylibre.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Geert Uytterhoeven <ge...@linux-m68k.org>
Fixes: e590474768f1 ("driver core: Set fw_devlink=on by default")
Reviewed-by: Rob Herring <r...@kernel.org>
Reviewed-by: Thierry Reding <tred...@nvidia.com>
Tested-by: Jon Hunter <jonath...@nvidia.com>
Signed-off-by: Saravana Kannan <sarava...@google.com>
---
drivers/of/property.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 5f9eed79a8aa..b2ea1951d937 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -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, },
--
2.30.0.296.g2bfb1c46d8-goog
