From: Guenter Roeck <linux@roeck-us.net>
Date: Sat, 22 Mar 2025 14:26:02 +0000 (-0700)
Subject: hwmon: (pmbus) Do not set regulators_node for single-channel chips
X-Git-Tag: v6.16-rc1~66^2~38
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0b3c04c81804197bf0025f3281e4463152f04bf1;p=thirdparty%2Fkernel%2Flinux.git

hwmon: (pmbus) Do not set regulators_node for single-channel chips

Single-channel regulators do not need and should not have a "regulators"
node. We can not entirely remove it due to existing bindings. To solve the
problem for new drivers, provide additional macros PMBUS_REGULATOR_ONE_NODE
and PMBUS_REGULATOR_STEP_ONE_NODE and convert existing drivers to use those
macros. The exception is the ir38064 driver because its devicetree files
and its description do not require or use the nested regulators node.

Modify PMBUS_REGULATOR_STEP_ONE and PMBUS_REGULATOR_ONE to set the
regulators_node pointer to NULL.

Cc: Cedricjustine.Encarnacion@analog.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250322142602.560042-1-linux@roeck-us.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---

diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
index 40b0dda32ea6f..dd7275a67a0ab 100644
--- a/drivers/hwmon/pmbus/lm25066.c
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -437,7 +437,7 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
 
 #if IS_ENABLED(CONFIG_SENSORS_LM25066_REGULATOR)
 static const struct regulator_desc lm25066_reg_desc[] = {
-	PMBUS_REGULATOR_ONE("vout"),
+	PMBUS_REGULATOR_ONE_NODE("vout"),
 };
 #endif
 
diff --git a/drivers/hwmon/pmbus/mpq7932.c b/drivers/hwmon/pmbus/mpq7932.c
index c1e2d0cb2fd08..8f10e37a7a767 100644
--- a/drivers/hwmon/pmbus/mpq7932.c
+++ b/drivers/hwmon/pmbus/mpq7932.c
@@ -51,8 +51,8 @@ static const struct regulator_desc mpq7932_regulators_desc[] = {
 };
 
 static const struct regulator_desc mpq7932_regulators_desc_one[] = {
-	PMBUS_REGULATOR_STEP_ONE("buck", MPQ7932_N_VOLTAGES,
-				 MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN),
+	PMBUS_REGULATOR_STEP_ONE_NODE("buck", MPQ7932_N_VOLTAGES,
+				      MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN),
 };
 #endif
 
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 742dafc443903..d2e9bfb5320fc 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -509,11 +509,11 @@ int pmbus_regulator_init_cb(struct regulator_dev *rdev,
 
 #define PMBUS_REGULATOR(_name, _id)   PMBUS_REGULATOR_STEP(_name, _id, 0, 0, 0)
 
-#define PMBUS_REGULATOR_STEP_ONE(_name, _voltages, _step, _min_uV)  \
+#define __PMBUS_REGULATOR_STEP_ONE(_name, _node, _voltages, _step, _min_uV)  \
 	{							\
 		.name = (_name),				\
 		.of_match = of_match_ptr(_name),		\
-		.regulators_node = of_match_ptr("regulators"),	\
+		.regulators_node = of_match_ptr(_node),		\
 		.ops = &pmbus_regulator_ops,			\
 		.type = REGULATOR_VOLTAGE,			\
 		.owner = THIS_MODULE,				\
@@ -523,7 +523,19 @@ int pmbus_regulator_init_cb(struct regulator_dev *rdev,
 		.init_cb = pmbus_regulator_init_cb,		\
 	}
 
-#define PMBUS_REGULATOR_ONE(_name)   PMBUS_REGULATOR_STEP_ONE(_name, 0, 0, 0)
+/*
+ * _NODE macros are defined for historic reasons and MUST NOT be used in new
+ * drivers.
+ */
+#define PMBUS_REGULATOR_STEP_ONE_NODE(_name, _voltages, _step, _min_uV)  \
+	__PMBUS_REGULATOR_STEP_ONE(_name, "regulators", _voltages, _step, _min_uV)
+
+#define PMBUS_REGULATOR_ONE_NODE(_name)	PMBUS_REGULATOR_STEP_ONE_NODE(_name, 0, 0, 0)
+
+#define PMBUS_REGULATOR_STEP_ONE(_name, _voltages, _step, _min_uV)  \
+	__PMBUS_REGULATOR_STEP_ONE(_name, NULL, _voltages, _step, _min_uV)
+
+#define PMBUS_REGULATOR_ONE(_name)	PMBUS_REGULATOR_STEP_ONE(_name, 0, 0, 0)
 
 /* Function declarations */
 
diff --git a/drivers/hwmon/pmbus/tda38640.c b/drivers/hwmon/pmbus/tda38640.c
index 07fe58c244850..d902d39f49f4d 100644
--- a/drivers/hwmon/pmbus/tda38640.c
+++ b/drivers/hwmon/pmbus/tda38640.c
@@ -15,7 +15,7 @@
 #include "pmbus.h"
 
 static const struct regulator_desc __maybe_unused tda38640_reg_desc[] = {
-	PMBUS_REGULATOR_ONE("vout"),
+	PMBUS_REGULATOR_ONE_NODE("vout"),
 };
 
 struct tda38640_data {
diff --git a/drivers/hwmon/pmbus/tps25990.c b/drivers/hwmon/pmbus/tps25990.c
index 0d2655e69549f..c13edd7e1abfc 100644
--- a/drivers/hwmon/pmbus/tps25990.c
+++ b/drivers/hwmon/pmbus/tps25990.c
@@ -333,7 +333,7 @@ static int tps25990_write_byte_data(struct i2c_client *client,
 
 #if IS_ENABLED(CONFIG_SENSORS_TPS25990_REGULATOR)
 static const struct regulator_desc tps25990_reg_desc[] = {
-	PMBUS_REGULATOR_ONE("vout"),
+	PMBUS_REGULATOR_ONE_NODE("vout"),
 };
 #endif