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authorIlya Lipnitskiy <ilya.lipnitskiy@gmail.com>2021-04-06 01:25:40 +0300
committerRob Herring <robh@kernel.org>2021-04-09 22:24:25 +0300
commitd473d32c2fbac2d1d7082c61899cfebd34eb267a (patch)
tree7c7be3b4e3526861bd576e39bf15798b6fd34526 /drivers/of
parent21d6ff39e1692b1f8c0d17331b15f76b40a3c726 (diff)
downloadlinux-d473d32c2fbac2d1d7082c61899cfebd34eb267a.tar.xz
of: property: fw_devlink: do not link ".*,nr-gpios"
[<vendor>,]nr-gpios property is used by some GPIO drivers[0] to indicate the number of GPIOs present on a system, not define a GPIO. nr-gpios is not configured by #gpio-cells and can't be parsed along with other "*-gpios" properties. nr-gpios without the "<vendor>," prefix is not allowed by the DT spec[1], so only add exception for the ",nr-gpios" suffix and let the error message continue being printed for non-compliant implementations. [0] nr-gpios is referenced in Documentation/devicetree/bindings/gpio: - gpio-adnp.txt - gpio-xgene-sb.txt - gpio-xlp.txt - snps,dw-apb-gpio.yaml [1] Link: https://github.com/devicetree-org/dt-schema/blob/cb53a16a1eb3e2169ce170c071e47940845ec26e/schemas/gpio/gpio-consumer.yaml#L20 Fixes errors such as: OF: /palmbus@300000/gpio@600: could not find phandle Fixes: 7f00be96f125 ("of: property: Add device link support for interrupt-parent, dmas and -gpio(s)") Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com> Cc: Saravana Kannan <saravanak@google.com> Cc: stable@vger.kernel.org # v5.5+ Link: https://lore.kernel.org/r/20210405222540.18145-1-ilya.lipnitskiy@gmail.com Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/property.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 5f9eed79a8aa..6d8368bf88ca 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -1260,7 +1260,16 @@ DEFINE_SIMPLE_PROP(pinctrl7, "pinctrl-7", NULL)
DEFINE_SIMPLE_PROP(pinctrl8, "pinctrl-8", NULL)
DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)
DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells")
-DEFINE_SUFFIX_PROP(gpios, "-gpios", "#gpio-cells")
+
+static struct device_node *parse_gpios(struct device_node *np,
+ const char *prop_name, int index)
+{
+ if (!strcmp_suffix(prop_name, ",nr-gpios"))
+ return NULL;
+
+ return parse_suffix_prop_cells(np, prop_name, index, "-gpios",
+ "#gpio-cells");
+}
static struct device_node *parse_iommu_maps(struct device_node *np,
const char *prop_name, int index)