diff --git a/drivers/hwmon/abituguru3.c b/drivers/hwmon/abituguru3.c
index 112dd0d9377c..8229ad30c909 100644
--- a/drivers/hwmon/abituguru3.c
+++ b/drivers/hwmon/abituguru3.c
@@ -145,7 +145,7 @@ struct abituguru3_data {
 	struct device *hwmon_dev;	/* hwmon registered device */
 	struct mutex update_lock;	/* protect access to data and uGuru */
 	unsigned short addr;		/* uguru base address */
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/*
@@ -1083,7 +1083,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
 	mutex_lock(&data->update_lock);
 	if (!data->valid || time_after(jiffies, data->last_updated + HZ)) {
 		/* Clear data->valid while updating */
-		data->valid = 0;
+		data->valid = false;
 		/* Read alarms */
 		if (abituguru3_read_increment_offset(data,
 				ABIT_UGURU3_SETTINGS_BANK,
@@ -1117,7 +1117,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
 				goto LEAVE_UPDATE;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 LEAVE_UPDATE:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ad7414.c b/drivers/hwmon/ad7414.c
index 6a765755d061..0afb89c4629d 100644
--- a/drivers/hwmon/ad7414.c
+++ b/drivers/hwmon/ad7414.c
@@ -37,7 +37,7 @@ static u8 AD7414_REG_LIMIT[] = { AD7414_REG_T_HIGH, AD7414_REG_T_LOW };
 struct ad7414_data {
 	struct i2c_client	*client;
 	struct mutex		lock;	/* atomic read data updates */
-	char			valid;	/* !=0 if following fields are valid */
+	bool			valid;	/* true if following fields are valid */
 	unsigned long		next_update;	/* In jiffies */
 	s16			temp_input;	/* Register values */
 	s8			temps[ARRAY_SIZE(AD7414_REG_LIMIT)];
@@ -95,7 +95,7 @@ static struct ad7414_data *ad7414_update_device(struct device *dev)
 		}
 
 		data->next_update = jiffies + HZ + HZ / 2;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->lock);
diff --git a/drivers/hwmon/ad7418.c b/drivers/hwmon/ad7418.c
index d618f6b2f382..22bdb7e5b9e0 100644
--- a/drivers/hwmon/ad7418.c
+++ b/drivers/hwmon/ad7418.c
@@ -46,7 +46,7 @@ struct ad7418_data {
 	enum chips		type;
 	struct mutex		lock;
 	int			adc_max;	/* number of ADC channels */
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 	s16			temp[3];	/* Register values */
 	u16			in[4];
@@ -111,14 +111,14 @@ static int ad7418_update_device(struct device *dev)
 			goto abort;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->lock);
 	return 0;
 
 abort:
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->lock);
 	return val;
 }
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
index 71deb2cd20f5..38b447c6e8cd 100644
--- a/drivers/hwmon/adm1021.c
+++ b/drivers/hwmon/adm1021.c
@@ -72,7 +72,7 @@ struct adm1021_data {
 	const struct attribute_group *groups[3];
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	char low_power;		/* !=0 if device in low power mode */
 	unsigned long last_updated;	/* In jiffies */
 
@@ -135,7 +135,7 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
 						ADM1023_REG_REM_OFFSET_PREC);
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/adm1025.c b/drivers/hwmon/adm1025.c
index de51e01c061b..4352f6a884e8 100644
--- a/drivers/hwmon/adm1025.c
+++ b/drivers/hwmon/adm1025.c
@@ -97,7 +97,7 @@ struct adm1025_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	u8 in[6];		/* register value */
@@ -148,7 +148,7 @@ static struct adm1025_data *adm1025_update_device(struct device *dev)
 			      ADM1025_REG_VID4) & 0x01) << 4);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/adm1026.c b/drivers/hwmon/adm1026.c
index 49cefbadb156..69b3ec752944 100644
--- a/drivers/hwmon/adm1026.c
+++ b/drivers/hwmon/adm1026.c
@@ -259,7 +259,7 @@ struct adm1026_data {
 	const struct attribute_group *groups[3];
 
 	struct mutex update_lock;
-	int valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_reading;	/* In jiffies */
 	unsigned long last_config;	/* In jiffies */
 
@@ -459,7 +459,7 @@ static struct adm1026_data *adm1026_update_device(struct device *dev)
 		data->last_config = jiffies;
 	}	/* last_config */
 
-	data->valid = 1;
+	data->valid = true;
 	mutex_unlock(&data->update_lock);
 	return data;
 }
diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c
index 50b1df7b008c..3e1999413f32 100644
--- a/drivers/hwmon/adm1029.c
+++ b/drivers/hwmon/adm1029.c
@@ -99,7 +99,7 @@ static const u8 ADM1029_REG_FAN_DIV[] = {
 struct adm1029_data {
 	struct i2c_client *client;
 	struct mutex update_lock; /* protect register access */
-	char valid;		/* zero until following fields are valid */
+	bool valid;		/* false until following fields are valid */
 	unsigned long last_updated;	/* in jiffies */
 
 	/* registers values, signed for temperature, unsigned for other stuff */
@@ -143,7 +143,7 @@ static struct adm1029_data *adm1029_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/adm1031.c b/drivers/hwmon/adm1031.c
index b538ace2d292..257ec53ae723 100644
--- a/drivers/hwmon/adm1031.c
+++ b/drivers/hwmon/adm1031.c
@@ -65,7 +65,7 @@ struct adm1031_data {
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
 	int chip_type;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned int update_interval;	/* In milliseconds */
 	/*
@@ -187,7 +187,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
 					ADM1031_REG_PWM) >> (4 * chan)) & 0x0f;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -650,7 +650,7 @@ static ssize_t fan_div_store(struct device *dev,
 			    data->fan_min[nr]);
 
 	/* Invalidate the cache: fan speed is no longer valid */
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 	return count;
 }
diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
index 6b1ce2242c61..0c16face3fd3 100644
--- a/drivers/hwmon/amc6821.c
+++ b/drivers/hwmon/amc6821.c
@@ -141,7 +141,7 @@ static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI,
 struct amc6821_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* register values */
@@ -258,7 +258,7 @@ static struct amc6821_data *amc6821_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 	mutex_unlock(&data->update_lock);
 	return data;
@@ -511,7 +511,7 @@ static ssize_t temp_auto_point_temp_store(struct device *dev,
 	}
 
 	mutex_lock(&data->update_lock);
-	data->valid = 0;
+	data->valid = false;
 
 	switch (ix) {
 	case 0:
@@ -584,7 +584,7 @@ static ssize_t pwm1_auto_point_pwm_store(struct device *dev,
 	}
 
 EXIT:
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 	return count;
 }
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index c31759794a29..fc6d6a9053ce 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -391,7 +391,7 @@ static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
 	cache->len = info[0];
 	memcpy(cache->type, &info[1], 4);
 	cache->flags = info[5];
-	cache->valid = 1;
+	cache->valid = true;
 
 out:
 	mutex_unlock(&smcreg.mutex);
diff --git a/drivers/hwmon/asb100.c b/drivers/hwmon/asb100.c
index ba9fcf6f9264..8cf0bcb85eb4 100644
--- a/drivers/hwmon/asb100.c
+++ b/drivers/hwmon/asb100.c
@@ -186,7 +186,7 @@ struct asb100_data {
 	/* array of 2 pointers to subclients */
 	struct i2c_client *lm75[2];
 
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	u8 in[7];		/* Register value */
 	u8 in_max[7];		/* Register value */
 	u8 in_min[7];		/* Register value */
@@ -993,7 +993,7 @@ static struct asb100_data *asb100_update_device(struct device *dev)
 			(asb100_read_value(client, ASB100_REG_ALARM2) << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 		dev_dbg(&client->dev, "... device update complete\n");
 	}
diff --git a/drivers/hwmon/asc7621.c b/drivers/hwmon/asc7621.c
index 600ffc7e1900..e835605a7456 100644
--- a/drivers/hwmon/asc7621.c
+++ b/drivers/hwmon/asc7621.c
@@ -77,7 +77,7 @@ struct asc7621_data {
 	struct i2c_client client;
 	struct device *class_dev;
 	struct mutex update_lock;
-	int valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_high_reading;	/* In jiffies */
 	unsigned long last_low_reading;		/* In jiffies */
 	/*
@@ -1032,7 +1032,7 @@ static struct asc7621_data *asc7621_update_device(struct device *dev)
 		data->last_low_reading = jiffies;
 	}			/* last_reading */
 
-	data->valid = 1;
+	data->valid = true;
 
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/atxp1.c b/drivers/hwmon/atxp1.c
index 1e08a5431f12..24e7da68c064 100644
--- a/drivers/hwmon/atxp1.c
+++ b/drivers/hwmon/atxp1.c
@@ -63,7 +63,7 @@ static struct atxp1_data *atxp1_update_device(struct device *dev)
 		data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
 		data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
 
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -136,7 +136,7 @@ static ssize_t cpu0_vid_store(struct device *dev,
 						ATXP1_VID, cvid | ATXP1_VIDENA);
 	}
 
-	data->valid = 0;
+	data->valid = false;
 
 	return count;
 }
@@ -180,7 +180,7 @@ static ssize_t gpio1_store(struct device *dev, struct device_attribute *attr,
 
 		i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
 
-		data->valid = 0;
+		data->valid = false;
 	}
 
 	return count;
@@ -224,7 +224,7 @@ static ssize_t gpio2_store(struct device *dev, struct device_attribute *attr,
 
 		i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
 
-		data->valid = 0;
+		data->valid = false;
 	}
 
 	return count;
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index bb9211215a68..ccf0af5b988a 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -167,7 +167,7 @@ static ssize_t show_temp(struct device *dev,
 		 * really help at all.
 		 */
 		tdata->temp = tdata->tjmax - ((eax >> 16) & 0x7f) * 1000;
-		tdata->valid = 1;
+		tdata->valid = true;
 		tdata->last_updated = jiffies;
 	}
 
diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
index c1e4cfb40c3d..e3ad4c2d0038 100644
--- a/drivers/hwmon/dme1737.c
+++ b/drivers/hwmon/dme1737.c
@@ -203,7 +203,7 @@ struct dme1737_data {
 	unsigned int addr;		/* for ISA devices only */
 
 	struct mutex update_lock;
-	int valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_update;	/* in jiffies */
 	unsigned long last_vbat;	/* in jiffies */
 	enum chips type;
@@ -778,7 +778,7 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
 		}
 
 		data->last_update = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index bf1c4b7ecb40..0886abf6ebab 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -109,7 +109,7 @@ static const u8 DS1621_REG_TEMP[3] = {
 struct ds1621_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	enum chips kind;		/* device type */
 
@@ -213,7 +213,7 @@ static struct ds1621_data *ds1621_update_client(struct device *dev)
 						  new_conf);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ds620.c b/drivers/hwmon/ds620.c
index 9ec722798c4a..82d7c3d58f49 100644
--- a/drivers/hwmon/ds620.c
+++ b/drivers/hwmon/ds620.c
@@ -56,7 +56,7 @@ static const u8 DS620_REG_TEMP[3] = {
 struct ds620_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	s16 temp[3];		/* Register values, word */
@@ -118,7 +118,7 @@ static struct ds620_data *ds620_update_client(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/emc6w201.c b/drivers/hwmon/emc6w201.c
index ec5c98702bf5..29082c8463f4 100644
--- a/drivers/hwmon/emc6w201.c
+++ b/drivers/hwmon/emc6w201.c
@@ -45,7 +45,7 @@ enum subfeature { input, min, max };
 struct emc6w201_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -162,7 +162,7 @@ static struct emc6w201_data *emc6w201_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
index 67b47de8263a..7f20edb0677c 100644
--- a/drivers/hwmon/f71805f.c
+++ b/drivers/hwmon/f71805f.c
@@ -165,7 +165,7 @@ struct f71805f_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_limits;	/* In jiffies */
 
@@ -404,7 +404,7 @@ static struct f71805f_data *f71805f_update_device(struct device *dev)
 			+ (f71805f_read8(data, F71805F_REG_STATUS(2)) << 16);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
index 4dec793fd07d..4673d403759a 100644
--- a/drivers/hwmon/f71882fg.c
+++ b/drivers/hwmon/f71882fg.c
@@ -253,7 +253,7 @@ struct f71882fg_data {
 
 	struct mutex update_lock;
 	int temp_start;			/* temp numbering start (0 or 1) */
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	char auto_point_temp_signed;
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_limits;	/* In jiffies */
@@ -1359,7 +1359,7 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
 							F71882FG_REG_IN(nr));
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index 3e567be60fb1..57c8a473698d 100644
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -85,7 +85,7 @@ struct f75375_data {
 	const char *name;
 	int kind;
 	struct mutex update_lock; /* protect register access */
-	char valid;
+	bool valid;
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_limits;	/* In jiffies */
 
@@ -228,7 +228,7 @@ static struct f75375_data *f75375_update_device(struct device *dev)
 				f75375_read8(client, F75375_REG_VOLT(nr));
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
index 5191cd85a8d1..c26195e3aad7 100644
--- a/drivers/hwmon/fschmd.c
+++ b/drivers/hwmon/fschmd.c
@@ -264,7 +264,7 @@ struct fschmd_data {
 	unsigned long watchdog_is_open;
 	char watchdog_expect_close;
 	char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* register values */
@@ -1356,7 +1356,7 @@ static struct fschmd_data *fschmd_update_device(struct device *dev)
 					       FSCHMD_REG_VOLT[data->kind][i]);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/g760a.c b/drivers/hwmon/g760a.c
index a692f7b2f6f7..36717b524dbd 100644
--- a/drivers/hwmon/g760a.c
+++ b/drivers/hwmon/g760a.c
@@ -95,7 +95,7 @@ static struct g760a_data *g760a_update_client(struct device *dev)
 		data->fan_sta = g760a_read_value(client, G760A_REG_FAN_STA);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/gl518sm.c b/drivers/hwmon/gl518sm.c
index 7aaee5a48243..dd683b0a648f 100644
--- a/drivers/hwmon/gl518sm.c
+++ b/drivers/hwmon/gl518sm.c
@@ -107,7 +107,7 @@ struct gl518_data {
 	enum chips type;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 voltage_in[4];	/* Register values; [0] = VDD */
@@ -211,7 +211,7 @@ static struct gl518_data *gl518_update_device(struct device *dev)
 		    gl518_read_value(client, GL518_REG_VIN3);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c
index 4ae1295cc3ea..096ba9797211 100644
--- a/drivers/hwmon/gl520sm.c
+++ b/drivers/hwmon/gl520sm.c
@@ -64,7 +64,7 @@ struct gl520_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid;		/* zero until the following fields are valid */
+	bool valid;		/* false until the following fields are valid */
 	unsigned long last_updated;	/* in jiffies */
 
 	u8 vid;
@@ -174,7 +174,7 @@ static struct gl520_data *gl520_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
index a4ec85207782..de6baf6ca3d1 100644
--- a/drivers/hwmon/ibmaem.c
+++ b/drivers/hwmon/ibmaem.c
@@ -127,7 +127,7 @@ struct aem_data {
 	struct device		*hwmon_dev;
 	struct platform_device	*pdev;
 	struct mutex		lock;
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 	u8			ver_major;
 	u8			ver_minor;
diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c
index b2ab83c9fd9a..f6ec165c0fa8 100644
--- a/drivers/hwmon/ibmpex.c
+++ b/drivers/hwmon/ibmpex.c
@@ -66,7 +66,7 @@ struct ibmpex_bmc_data {
 	struct device		*hwmon_dev;
 	struct device		*bmc_device;
 	struct mutex		lock;
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 
 	struct ipmi_addr	address;
@@ -239,7 +239,7 @@ static void ibmpex_update_device(struct ibmpex_bmc_data *data)
 	}
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 
 out:
 	mutex_unlock(&data->lock);
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 1f93134afcb9..0e543dbe0a6b 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -519,7 +519,7 @@ struct it87_data {
 	unsigned short addr;
 	const char *name;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u16 in_scaled;		/* Internal voltage sensors are scaled */
@@ -844,7 +844,7 @@ static struct it87_data *it87_update_device(struct device *dev)
 			data->vid &= 0x3f;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -980,7 +980,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 			regval |= 0x80;
 			it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
 		}
-		data->valid = 0;
+		data->valid = false;
 		reg = IT87_REG_TEMP_OFFSET[nr];
 		break;
 	}
@@ -1079,7 +1079,7 @@ static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
 	it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 	if (has_temp_old_peci(data, nr))
 		it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
-	data->valid = 0;	/* Force cache refresh */
+	data->valid = false;	/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -1834,7 +1834,7 @@ static ssize_t clear_intrusion(struct device *dev,
 		config |= BIT(5);
 		it87_write_value(data, IT87_REG_CONFIG, config);
 		/* Invalidate cache to force re-read */
-		data->valid = 0;
+		data->valid = false;
 	}
 	mutex_unlock(&data->update_lock);
 
@@ -3229,7 +3229,7 @@ static int __maybe_unused it87_resume(struct device *dev)
 	it87_start_monitoring(data);
 
 	/* force update */
-	data->valid = 0;
+	data->valid = false;
 
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/lineage-pem.c b/drivers/hwmon/lineage-pem.c
index 1109fffa76fb..ef5a49cd9149 100644
--- a/drivers/hwmon/lineage-pem.c
+++ b/drivers/hwmon/lineage-pem.c
@@ -191,7 +191,7 @@ static struct pem_data *pem_update_device(struct device *dev)
 		i2c_smbus_write_byte(client, PEM_CLEAR_INFO_FLAGS);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
index c8f93c5d1ccc..339a145afc09 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -139,7 +139,7 @@ struct lm63_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
 	const struct attribute_group *groups[5];
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	char lut_valid; /* zero until lut fields are valid */
 	unsigned long last_updated; /* in jiffies */
 	unsigned long lut_last_updated; /* in jiffies */
@@ -289,7 +289,7 @@ static struct lm63_data *lm63_update_device(struct device *dev)
 			       LM63_REG_ALERT_STATUS) & 0x7F;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	lm63_update_lut(data);
@@ -714,7 +714,7 @@ static ssize_t temp2_type_store(struct device *dev,
 	reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
 	i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
 				  reg | (data->trutherm ? 0x02 : 0x00));
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return count;
diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
index 7570c9d50ddc..df6af85e170a 100644
--- a/drivers/hwmon/lm77.c
+++ b/drivers/hwmon/lm77.c
@@ -55,7 +55,7 @@ static const u8 temp_regs[t_num_temp] = {
 struct lm77_data {
 	struct i2c_client	*client;
 	struct mutex		update_lock;
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 	int			temp[t_num_temp]; /* index using temp_index */
 	u8			alarms;
@@ -118,7 +118,7 @@ static struct lm77_data *lm77_update_device(struct device *dev)
 		data->alarms =
 			lm77_read_value(client, LM77_REG_TEMP) & 0x0007;
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
index 1aa35ca0c6fe..5e129cbec1cb 100644
--- a/drivers/hwmon/lm78.c
+++ b/drivers/hwmon/lm78.c
@@ -117,7 +117,7 @@ struct lm78_data {
 	int isa_addr;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[7];		/* Register value */
@@ -772,7 +772,7 @@ static struct lm78_data *lm78_update_device(struct device *dev)
 		data->alarms = lm78_read_value(data, LM78_REG_ALARM1) +
 		    (lm78_read_value(data, LM78_REG_ALARM2) << 8);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 		data->fan_div[2] = 1;
 	}
diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
index 97ab491d2922..e85e062bbf32 100644
--- a/drivers/hwmon/lm80.c
+++ b/drivers/hwmon/lm80.c
@@ -117,7 +117,7 @@ struct lm80_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
 	char error;		/* !=0 if error occurred during last update */
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[i_num_in][7];	/* Register value, 1st index is enum in_index */
@@ -236,14 +236,14 @@ static struct lm80_data *lm80_update_device(struct device *dev)
 		data->alarms = prev_rv + (rv << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 		data->error = 0;
 	}
 	goto done;
 
 abort:
 	ret = ERR_PTR(rv);
-	data->valid = 0;
+	data->valid = false;
 	data->error = 1;
 
 done:
diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c
index 2ff5ecce608e..74fd7aa373a3 100644
--- a/drivers/hwmon/lm83.c
+++ b/drivers/hwmon/lm83.c
@@ -105,7 +105,7 @@ struct lm83_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -137,7 +137,7 @@ static struct lm83_data *lm83_update_device(struct device *dev)
 		    << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c
index c7bf5de7b70f..88cf2012d34b 100644
--- a/drivers/hwmon/lm85.c
+++ b/drivers/hwmon/lm85.c
@@ -294,7 +294,7 @@ struct lm85_data {
 	bool has_vid5;	/* true if VID5 is configured for ADT7463 or ADT7468 */
 
 	struct mutex update_lock;
-	int valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_reading;	/* In jiffies */
 	unsigned long last_config;	/* In jiffies */
 
@@ -541,7 +541,7 @@ static struct lm85_data *lm85_update_device(struct device *dev)
 		data->last_config = jiffies;
 	}  /* last_config */
 
-	data->valid = 1;
+	data->valid = true;
 
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
index b2d820125bb6..1750bc588856 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -141,7 +141,7 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
 
 struct lm87_data {
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* In jiffies */
 
 	u8 channel;		/* register value */
@@ -251,7 +251,7 @@ static struct lm87_data *lm87_update_device(struct device *dev)
 		data->aout = lm87_read_value(client, LM87_REG_AOUT);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm92.c b/drivers/hwmon/lm92.c
index 9bf278cf0bd0..5bae6eedcaf1 100644
--- a/drivers/hwmon/lm92.c
+++ b/drivers/hwmon/lm92.c
@@ -99,7 +99,7 @@ static const u8 regs[t_num_regs] = {
 struct lm92_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -126,7 +126,7 @@ static struct lm92_data *lm92_update_device(struct device *dev)
 				i2c_smbus_read_word_swapped(client, regs[i]);
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm93.c b/drivers/hwmon/lm93.c
index 78d6dfaf145b..dc67bf954b21 100644
--- a/drivers/hwmon/lm93.c
+++ b/drivers/hwmon/lm93.c
@@ -202,7 +202,7 @@ struct lm93_data {
 	/* client update function */
 	void (*update)(struct lm93_data *, struct i2c_client *);
 
-	char valid; /* !=0 if following fields are valid */
+	bool valid; /* true if following fields are valid */
 
 	/* register values, arranged by block read groups */
 	struct block1_t block1;
@@ -917,7 +917,7 @@ static struct lm93_data *lm93_update_device(struct device *dev)
 
 		data->update(data, client);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c
index 00dbc170c8c6..8ea46ff20be5 100644
--- a/drivers/hwmon/lm95241.c
+++ b/drivers/hwmon/lm95241.c
@@ -78,7 +78,7 @@ struct lm95241_data {
 	struct mutex update_lock;
 	unsigned long last_updated;	/* in jiffies */
 	unsigned long interval;		/* in milli-seconds */
-	char valid;		/* zero until following fields are valid */
+	bool valid;		/* false until following fields are valid */
 	/* registers values */
 	u8 temp[ARRAY_SIZE(lm95241_reg_address)];
 	u8 status, config, model, trutherm;
@@ -118,7 +118,7 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
 		data->status = i2c_smbus_read_byte_data(client,
 							LM95241_REG_R_STATUS);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -257,7 +257,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
 			else
 				data->config &= ~R2DF_MASK;
 		}
-		data->valid = 0;
+		data->valid = false;
 		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
 						data->config);
 		break;
@@ -273,7 +273,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
 			else
 				data->config &= ~R2DF_MASK;
 		}
-		data->valid = 0;
+		data->valid = false;
 		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
 						data->config);
 		break;
diff --git a/drivers/hwmon/ltc4151.c b/drivers/hwmon/ltc4151.c
index 13b85367a21f..e3ac004c1ed1 100644
--- a/drivers/hwmon/ltc4151.c
+++ b/drivers/hwmon/ltc4151.c
@@ -77,7 +77,7 @@ static struct ltc4151_data *ltc4151_update_device(struct device *dev)
 			data->regs[i] = val;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ltc4215.c b/drivers/hwmon/ltc4215.c
index 1d18c212054f..fa43d26ddd4f 100644
--- a/drivers/hwmon/ltc4215.c
+++ b/drivers/hwmon/ltc4215.c
@@ -64,7 +64,7 @@ static struct ltc4215_data *ltc4215_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ltc4261.c b/drivers/hwmon/ltc4261.c
index b81e9c3d297b..b91cc4fe84e5 100644
--- a/drivers/hwmon/ltc4261.c
+++ b/drivers/hwmon/ltc4261.c
@@ -73,13 +73,13 @@ static struct ltc4261_data *ltc4261_update_device(struct device *dev)
 					"Failed to read ADC value: error %d\n",
 					val);
 				ret = ERR_PTR(val);
-				data->valid = 0;
+				data->valid = false;
 				goto abort;
 			}
 			data->regs[i] = val;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c
index ae3a6a7bdaa2..daa5d8af1e69 100644
--- a/drivers/hwmon/max16065.c
+++ b/drivers/hwmon/max16065.c
@@ -166,7 +166,7 @@ static struct max16065_data *max16065_update_device(struct device *dev)
 			  = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i));
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 	mutex_unlock(&data->update_lock);
 	return data;
diff --git a/drivers/hwmon/max1619.c b/drivers/hwmon/max1619.c
index 8bd941cae4d1..eae9e68027bc 100644
--- a/drivers/hwmon/max1619.c
+++ b/drivers/hwmon/max1619.c
@@ -79,7 +79,7 @@ enum temp_index {
 struct max1619_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -124,7 +124,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
 			data->alarms ^= 0x02;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/max1668.c b/drivers/hwmon/max1668.c
index 5c41c78f0458..78688e6cb87d 100644
--- a/drivers/hwmon/max1668.c
+++ b/drivers/hwmon/max1668.c
@@ -58,7 +58,7 @@ struct max1668_data {
 	enum chips type;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* 1x local and 4x remote */
@@ -120,7 +120,7 @@ static struct max1668_data *max1668_update_device(struct device *dev)
 	data->alarms |= val;
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 abort:
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c
index b71899c641fa..ccc0f047bd44 100644
--- a/drivers/hwmon/max6639.c
+++ b/drivers/hwmon/max6639.c
@@ -69,7 +69,7 @@ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 };
 struct max6639_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* Register values sampled regularly */
@@ -141,7 +141,7 @@ static struct max6639_data *max6639_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/max6642.c b/drivers/hwmon/max6642.c
index 23d93142b0b3..699d265aae2e 100644
--- a/drivers/hwmon/max6642.c
+++ b/drivers/hwmon/max6642.c
@@ -181,7 +181,7 @@ static struct max6642_data *max6642_update_device(struct device *dev)
 					MAX6642_REG_R_STATUS);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/pc87360.c b/drivers/hwmon/pc87360.c
index 6a9ba23cd302..0828436a1f6c 100644
--- a/drivers/hwmon/pc87360.c
+++ b/drivers/hwmon/pc87360.c
@@ -178,7 +178,7 @@ struct pc87360_data {
 	struct device *hwmon_dev;
 	struct mutex lock;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	int address[3];
@@ -1673,7 +1673,7 @@ static struct pc87360_data *pc87360_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/sch5636.c b/drivers/hwmon/sch5636.c
index a5cd4de36575..39ff1c9b1df5 100644
--- a/drivers/hwmon/sch5636.c
+++ b/drivers/hwmon/sch5636.c
@@ -56,7 +56,7 @@ struct sch5636_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	u8 in[SCH5636_NO_INS];
 	u8 temp_val[SCH5636_NO_TEMPS];
@@ -140,7 +140,7 @@ static struct sch5636_data *sch5636_update_device(struct device *dev)
 	}
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 abort:
 	mutex_unlock(&data->update_lock);
 	return ret;
diff --git a/drivers/hwmon/sht21.c b/drivers/hwmon/sht21.c
index 7d18ce5d3839..e23dbf287233 100644
--- a/drivers/hwmon/sht21.c
+++ b/drivers/hwmon/sht21.c
@@ -41,7 +41,7 @@ struct sht21 {
 	unsigned long last_update;
 	int temperature;
 	int humidity;
-	char valid;
+	bool valid;
 	char eic[18];
 };
 
@@ -105,7 +105,7 @@ static int sht21_update_measurements(struct device *dev)
 			goto out;
 		sht21->humidity = sht21_rh_ticks_to_per_cent_mille(ret);
 		sht21->last_update = jiffies;
-		sht21->valid = 1;
+		sht21->valid = true;
 	}
 out:
 	mutex_unlock(&sht21->lock);
diff --git a/drivers/hwmon/sis5595.c b/drivers/hwmon/sis5595.c
index 0c6741f949f5..018cb5a7651f 100644
--- a/drivers/hwmon/sis5595.c
+++ b/drivers/hwmon/sis5595.c
@@ -172,7 +172,7 @@ struct sis5595_data {
 	struct mutex lock;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	char maxins;		/* == 3 if temp enabled, otherwise == 4 */
 	u8 revision;		/* Reg. value */
@@ -728,7 +728,7 @@ static struct sis5595_data *sis5595_update_device(struct device *dev)
 		    sis5595_read_value(data, SIS5595_REG_ALARM1) |
 		    (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c
index 62906d9c4b86..8c4ed72e5d68 100644
--- a/drivers/hwmon/smm665.c
+++ b/drivers/hwmon/smm665.c
@@ -265,7 +265,7 @@ static struct smm665_data *smm665_update_device(struct device *dev)
 			data->adc[i] = val;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c
index f928b8d4ff48..c26d6eae0e4e 100644
--- a/drivers/hwmon/smsc47b397.c
+++ b/drivers/hwmon/smsc47b397.c
@@ -96,7 +96,7 @@ struct smsc47b397_data {
 
 	struct mutex update_lock;
 	unsigned long last_updated; /* in jiffies */
-	int valid;
+	bool valid;
 
 	/* register values */
 	u16 fan[4];
@@ -137,7 +137,7 @@ static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 		dev_dbg(dev, "... device update complete\n");
 	}
diff --git a/drivers/hwmon/smsc47m192.c b/drivers/hwmon/smsc47m192.c
index 03a87aa2017a..a5db15c087ae 100644
--- a/drivers/hwmon/smsc47m192.c
+++ b/drivers/hwmon/smsc47m192.c
@@ -86,7 +86,7 @@ struct smsc47m192_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[8];		/* Register value */
@@ -157,7 +157,7 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
 						SMSC47M192_REG_ALARM2) << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/thmc50.c b/drivers/hwmon/thmc50.c
index fde5e2d0825a..6a804f5036f4 100644
--- a/drivers/hwmon/thmc50.c
+++ b/drivers/hwmon/thmc50.c
@@ -62,7 +62,7 @@ struct thmc50_data {
 	enum chips type;
 	unsigned long last_updated;	/* In jiffies */
 	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 
 	/* Register values */
 	s8 temp_input[3];
@@ -107,7 +107,7 @@ static struct thmc50_data *thmc50_update_device(struct device *dev)
 		data->alarms =
 		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index 9dc210b55e69..88007416c210 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -136,7 +136,7 @@ struct tmp401_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 	enum chips kind;
 
@@ -267,7 +267,7 @@ static struct tmp401_data *tmp401_update_device(struct device *dev)
 		data->temp_crit_hyst = val;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 abort:
@@ -413,7 +413,7 @@ static ssize_t reset_temp_history_store(struct device *dev,
 	}
 	mutex_lock(&data->update_lock);
 	i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return count;
diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index b963a369c5ab..9063d71fc11b 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -93,7 +93,7 @@ struct tmp421_data {
 	struct hwmon_channel_info temp_info;
 	const struct hwmon_channel_info *info[2];
 	struct hwmon_chip_info chip;
-	char valid;
+	bool valid;
 	unsigned long last_updated;
 	unsigned long channels;
 	u8 config;
@@ -140,14 +140,14 @@ static int tmp421_update_device(struct tmp421_data *data)
 			data->temp[i] |= ret;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 exit:
 	mutex_unlock(&data->update_lock);
 
 	if (ret < 0) {
-		data->valid = 0;
+		data->valid = false;
 		return ret;
 	}
 
diff --git a/drivers/hwmon/via686a.c b/drivers/hwmon/via686a.c
index a2eddd2c2538..55634110c2f9 100644
--- a/drivers/hwmon/via686a.c
+++ b/drivers/hwmon/via686a.c
@@ -304,7 +304,7 @@ struct via686a_data {
 	const char *name;
 	struct device *hwmon_dev;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[5];		/* Register value */
@@ -800,7 +800,7 @@ static struct via686a_data *via686a_update_device(struct device *dev)
 				       VIA686A_REG_ALARM1) |
 		    (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
index 2fbdc532aed4..4a5e911d26eb 100644
--- a/drivers/hwmon/vt1211.c
+++ b/drivers/hwmon/vt1211.c
@@ -105,7 +105,7 @@ struct vt1211_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* Register values */
@@ -319,7 +319,7 @@ static struct vt1211_data *vt1211_update_device(struct device *dev)
 				vt1211_read8(data, VT1211_REG_ALARM1);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/vt8231.c b/drivers/hwmon/vt8231.c
index 6603727e15a0..03275ac8ba72 100644
--- a/drivers/hwmon/vt8231.c
+++ b/drivers/hwmon/vt8231.c
@@ -145,7 +145,7 @@ struct vt8231_data {
 
 	struct mutex update_lock;
 	struct device *hwmon_dev;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[6];		/* Register value */
@@ -929,7 +929,7 @@ static struct vt8231_data *vt8231_update_device(struct device *dev)
 			data->alarms &= ~0x80;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 705a59663d42..af89b32a93a5 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -320,7 +320,7 @@ struct w83627ehf_data {
 	const u16 *scale_in;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* Register values */
@@ -688,7 +688,7 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
 						W83627EHF_REG_CASEOPEN_DET);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -1099,7 +1099,7 @@ clear_caseopen(struct device *dev, struct w83627ehf_data *data, int channel,
 	reg = w83627ehf_read_value(data, W83627EHF_REG_CASEOPEN_CLR);
 	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg | mask);
 	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg & ~mask);
-	data->valid = 0;	/* Force cache refresh */
+	data->valid = false;	/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 
 	return 0;
@@ -2004,7 +2004,7 @@ static int __maybe_unused w83627ehf_resume(struct device *dev)
 	w83627ehf_write_value(data, W83627EHF_REG_VBAT, data->vbat);
 
 	/* Force re-reading all values */
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return 0;
diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index a07b97400cba..9be277156ed2 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -355,7 +355,7 @@ struct w83627hf_data {
 	enum chips type;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[9];		/* Register value */
@@ -448,7 +448,7 @@ static int w83627hf_resume(struct device *dev)
 	w83627hf_write_value(data, W83781D_REG_SCFG2, data->scfg2);
 
 	/* Force re-reading all values */
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return 0;
@@ -1905,7 +1905,7 @@ static struct w83627hf_data *w83627hf_update_device(struct device *dev)
 		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS1) |
 		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS3) << 16;
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index ce8e2c10e854..b3579721265f 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -203,7 +203,7 @@ struct w83781d_data {
 	int isa_addr;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	struct i2c_client *lm75[2];	/* for secondary I2C addresses */
@@ -1554,7 +1554,7 @@ static struct w83781d_data *w83781d_update_device(struct device *dev)
 					       W83781D_REG_BEEP_INTS3) << 16;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
index 37b25a1474c4..ca577cd2a1c9 100644
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -270,7 +270,7 @@ struct w83791d_data {
 	struct device *hwmon_dev;
 	struct mutex update_lock;
 
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* array of 2 pointers to subclients */
@@ -1603,7 +1603,7 @@ static struct w83791d_data *w83791d_update_device(struct device *dev)
 				<< 4;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
index abd5c3a722b9..4bfebdab1c60 100644
--- a/drivers/hwmon/w83792d.c
+++ b/drivers/hwmon/w83792d.c
@@ -261,7 +261,7 @@ struct w83792d_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* array of 2 pointers to subclients */
@@ -743,7 +743,7 @@ intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
 	mutex_lock(&data->update_lock);
 	reg = w83792d_read_value(client, W83792D_REG_CHASSIS_CLR);
 	w83792d_write_value(client, W83792D_REG_CHASSIS_CLR, reg | 0x80);
-	data->valid = 0;		/* Force cache refresh */
+	data->valid = false;		/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -1595,7 +1595,7 @@ static struct w83792d_data *w83792d_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index e7d0484eabe4..81221702951a 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -205,7 +205,7 @@ struct w83793_data {
 	struct i2c_client *lm75[2];
 	struct device *hwmon_dev;
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
 					 * nonvolatile registers
@@ -453,7 +453,7 @@ store_chassis_clear(struct device *dev,
 	mutex_lock(&data->update_lock);
 	reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 	w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
-	data->valid = 0;		/* Force cache refresh */
+	data->valid = false;		/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -2081,7 +2081,7 @@ static struct w83793_data *w83793_update_device(struct device *dev)
 		data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
 	w83793_update_nonvolatile(dev);
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 
 END:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c
index 621b05afa837..45b12c4287df 100644
--- a/drivers/hwmon/w83795.c
+++ b/drivers/hwmon/w83795.c
@@ -379,7 +379,7 @@ struct w83795_data {
 	u8 enable_beep;
 	u8 beeps[6];		/* Register value */
 
-	char valid;
+	bool valid;
 	char valid_limits;
 	char valid_pwm_config;
 };
@@ -684,7 +684,7 @@ static struct w83795_data *w83795_update_device(struct device *dev)
 			     tmp & ~ALARM_CTRL_RTSACS);
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 
 END:
 	mutex_unlock(&data->update_lock);
@@ -764,7 +764,7 @@ store_chassis_clear(struct device *dev,
 
 	/* Clear status and force cache refresh */
 	w83795_read(client, W83795_REG_ALARM(5));
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 	return count;
 }
diff --git a/drivers/hwmon/w83l785ts.c b/drivers/hwmon/w83l785ts.c
index 656a77102ca6..a41f989d66e2 100644
--- a/drivers/hwmon/w83l785ts.c
+++ b/drivers/hwmon/w83l785ts.c
@@ -98,7 +98,7 @@ static struct i2c_driver w83l785ts_driver = {
 struct w83l785ts_data {
 	struct device *hwmon_dev;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -270,7 +270,7 @@ static struct w83l785ts_data *w83l785ts_update_device(struct device *dev)
 				W83L785TS_REG_TEMP_OVER, data->temp[1]);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83l786ng.c b/drivers/hwmon/w83l786ng.c
index 542afff1423b..11ba23c1af85 100644
--- a/drivers/hwmon/w83l786ng.c
+++ b/drivers/hwmon/w83l786ng.c
@@ -113,7 +113,7 @@ DIV_TO_REG(long val)
 struct w83l786ng_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
 					 * nonvolatile registers */
@@ -209,7 +209,7 @@ static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
 		data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 	}
 
