[hwmon-next PATCH v5 2/4] hwmon: (adt7470) Add ADT7470_PWM_MAX macro

Luiz Angelo Daros de Luca <[email protected]> Thu, 30 Jul 2026 18:29:57 -0300
Newsgroups org.kernel.vger.linux-pwm,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-hwmon,org.kernel.vger.linux-kernel
Message-ID <[email protected]>
Instead of a magic 255, use a macro to refer to it.

Signed-off-by: Luiz Angelo Daros de Luca <[email protected]>
---
 drivers/hwmon/adt7470.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c
index c45b984c02e6..87ddd7b8ddae 100644
--- a/drivers/hwmon/adt7470.c
+++ b/drivers/hwmon/adt7470.c
@@ -100,6 +100,7 @@ static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
 #define ADT7470_REG_FAN_MAX(x)	(ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
 
 #define ADT7470_PWM_COUNT	4
+#define ADT7470_PWM_MAX		255
 #define ADT7470_REG_PWM(x)	(ADT7470_REG_PWM_BASE_ADDR + (x))
 #define ADT7470_REG_PWM_MAX(x)	(ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
 #define ADT7470_REG_PWM_MIN(x)	(ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
@@ -850,7 +851,7 @@ static int adt7470_pwm_write(struct device *dev, u32 attr, int channel, long val
 
 	switch (attr) {
 	case hwmon_pwm_input:
-		val = clamp_val(val, 0, 255);
+		val = clamp_val(val, 0, ADT7470_PWM_MAX);
 		mutex_lock(&data->lock);
 		err = regmap_write(data->regmap, ADT7470_REG_PWM(channel),
 				   val);
@@ -910,7 +911,7 @@ static ssize_t pwm_max_store(struct device *dev,
 	if (kstrtol(buf, 10, &temp))
 		return -EINVAL;
 
-	temp = clamp_val(temp, 0, 255);
+	temp = clamp_val(temp, 0, ADT7470_PWM_MAX);
 
 	mutex_lock(&data->lock);
 	data->pwm_max[attr->index] = temp;
@@ -945,7 +946,7 @@ static ssize_t pwm_min_store(struct device *dev,
 	if (kstrtol(buf, 10, &temp))
 		return -EINVAL;
 
-	temp = clamp_val(temp, 0, 255);
+	temp = clamp_val(temp, 0, ADT7470_PWM_MAX);
 
 	mutex_lock(&data->lock);
 	data->pwm_min[attr->index] = temp;

-- 
2.55.0