[PATCH v3 6/8] of: unittest: Test fw_devlink with PWM nexus maps

[Ernest Van Hoecke <ernestvanhoecke@gmail.com>]

From: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>

Extend the fw_devlink OF unit tests with PWM references routed through a
nexus map. Verify that the mapped consumer has exactly one link to the
final PWM provider rather than to the nexus.

Also cover a direct PWM reference to ensure that it continues to resolve
to the original provider when no map is present.

Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
---
v3: Route pwm-map entries to two providers, use a middle entry (Herve)
v2: https://lore.kernel.org/r/20260910-fw-devlink-nexus-ready-v2-5-17ac82dbe226@toradex.com
---
 drivers/of/unittest-data/tests-phandle.dtsi | 22 ++++++++++++++++++++++
 drivers/of/unittest.c                       |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/drivers/of/unittest-data/tests-phandle.dtsi b/drivers/of/unittest-data/tests-phandle.dtsi
index f5d7ee072c90..1fd465bb8f79 100644
--- a/drivers/of/unittest-data/tests-phandle.dtsi
+++ b/drivers/of/unittest-data/tests-phandle.dtsi
@@ -89,13 +89,27 @@ gpio_provider_b: gpio-controller-b {
 					#gpio-cells = <2>;
 				};
 
+				pwm_provider_a: pwm-controller-a {
+					#pwm-cells = <2>;
+				};
+
+				pwm_provider_b: pwm-controller-b {
+					#pwm-cells = <2>;
+				};
+
 				fwdevlink_nexus: nexus {
 					#gpio-cells = <2>;
+					#pwm-cells = <2>;
 					gpio-map = <1 0 &gpio_provider_a 3 0>,
 						   <2 0 &gpio_provider_b 5 0>,
 						   <3 0 &gpio_provider_a 7 0>;
 					gpio-map-mask = <0xffffffff 0>;
 					gpio-map-pass-thru = <0 0xffffffff>;
+					pwm-map = <1 0 &pwm_provider_a 3 0>,
+						  <2 0 &pwm_provider_b 5 0>,
+						  <3 0 &pwm_provider_a 7 0>;
+					pwm-map-mask = <0xffffffff 0>;
+					pwm-map-pass-thru = <0 0xffffffff>;
 				};
 
 				gpio-compat-consumer {
@@ -117,6 +131,14 @@ gpio-direct-consumer {
 				gpio-singular-consumer {
 					test-gpio = <&fwdevlink_nexus 2 1>;
 				};
+
+				pwm-consumer {
+					pwms = <&fwdevlink_nexus 2 1000>;
+				};
+
+				pwm-direct-consumer {
+					pwms = <&pwm_provider_a 1 0>;
+				};
 			};
 		};
 	};
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index f15c110dbf4d..320a992c4310 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -770,6 +770,8 @@ static void __init of_unittest_fw_devlink(void)
 		{ "gpio-consumer", "gpio-controller-b" },
 		{ "gpio-direct-consumer", "gpio-controller-a" },
 		{ "gpio-singular-consumer", "gpio-controller-b" },
+		{ "pwm-consumer", "pwm-controller-b" },
+		{ "pwm-direct-consumer", "pwm-controller-a" },
 	};
 	struct device_node *tests;
 	int i;

-- 
2.43.0