linux-kernel - [PATCH v3 1/4] hwmon: pm_bus: core: Add min

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Date:   Wed,  7 Dec 2022 18:37:13 +0100
From:   Saravanan Sekar <saravanan@...umiz.com>
To:     jdelvare@...e.com, linux@...ck-us.net, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, marten.lindahl@...s.com
Cc:     linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Saravanan Sekar <saravanan@...umiz.com>
Subject: [PATCH v3 1/4] hwmon: pm_bus: core: Add min_uV in pmbus regulator helper macro

Some regulator operates in a range of voltage which should not allow
below the lower threshold.

Signed-off-by: Saravanan Sekar <saravanan@...umiz.com>
---
 drivers/hwmon/pmbus/ltc2978.c | 16 ++++++++--------
 drivers/hwmon/pmbus/pmbus.h   |  5 +++--
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index 6d2592731ba3..406a36885ef3 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -569,14 +569,14 @@ MODULE_DEVICE_TABLE(i2c, ltc2978_id);
 #define LTC2978_N_VOLTAGES	((LTC2978_MAX_UV / LTC2978_UV_STEP) + 1)
 
 static const struct regulator_desc ltc2978_reg_desc[] = {
-	PMBUS_REGULATOR_STEP("vout", 0, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
-	PMBUS_REGULATOR_STEP("vout", 1, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
-	PMBUS_REGULATOR_STEP("vout", 2, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
-	PMBUS_REGULATOR_STEP("vout", 3, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
-	PMBUS_REGULATOR_STEP("vout", 4, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
-	PMBUS_REGULATOR_STEP("vout", 5, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
-	PMBUS_REGULATOR_STEP("vout", 6, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
-	PMBUS_REGULATOR_STEP("vout", 7, LTC2978_N_VOLTAGES, LTC2978_UV_STEP),
+	PMBUS_REGULATOR_STEP("vout", 0, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
+	PMBUS_REGULATOR_STEP("vout", 1, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
+	PMBUS_REGULATOR_STEP("vout", 2, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
+	PMBUS_REGULATOR_STEP("vout", 3, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
+	PMBUS_REGULATOR_STEP("vout", 4, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
+	PMBUS_REGULATOR_STEP("vout", 5, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
+	PMBUS_REGULATOR_STEP("vout", 6, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
+	PMBUS_REGULATOR_STEP("vout", 7, LTC2978_N_VOLTAGES, LTC2978_UV_STEP, 0),
 };
 
 static const struct regulator_desc ltc2978_reg_desc_default[] = {
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 10fb17879f8e..713ea7915425 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -464,7 +464,7 @@ struct pmbus_driver_info {
 extern const struct regulator_ops pmbus_regulator_ops;
 
 /* Macros for filling in array of struct regulator_desc */
-#define PMBUS_REGULATOR_STEP(_name, _id, _voltages, _step)  \
+#define PMBUS_REGULATOR_STEP(_name, _id, _voltages, _step, _min_uV)  \
 	[_id] = {						\
 		.name = (_name # _id),				\
 		.id = (_id),					\
@@ -475,9 +475,10 @@ extern const struct regulator_ops pmbus_regulator_ops;
 		.owner = THIS_MODULE,				\
 		.n_voltages = _voltages,			\
 		.uV_step = _step,				\
+		.min_uV = _min_uV,				\
 	}
 
-#define PMBUS_REGULATOR(_name, _id)	PMBUS_REGULATOR_STEP(_name, _id, 0, 0)
+#define PMBUS_REGULATOR(_name, _id)   PMBUS_REGULATOR_STEP(_name, _id, 0, 0, 0)
 
 /* Function declarations */
 
-- 
2.34.1