1 files changed, 431 insertions, 432 deletions

diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index b31f4964f852..b86d9df7105d 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -18,17 +18,15 @@
  * and thus has 16 bits registers for its value and limit instead of 8 bits.
  */
 
-#include <linux/module.h>
-#include <linux/init.h>
 #include <linux/bitops.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
+#include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
 #include <linux/mutex.h>
-#include <linux/sysfs.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
 
 /* Addresses to scan */
 static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, 0x4d,
@@ -41,44 +39,19 @@ enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 };
  * reading and writing
  */
 #define TMP401_STATUS				0x02
-#define TMP401_CONFIG_READ			0x03
-#define TMP401_CONFIG_WRITE			0x09
-#define TMP401_CONVERSION_RATE_READ		0x04
-#define TMP401_CONVERSION_RATE_WRITE		0x0A
+#define TMP401_CONFIG				0x03
+#define TMP401_CONVERSION_RATE			0x04
 #define TMP401_TEMP_CRIT_HYST			0x21
 #define TMP401_MANUFACTURER_ID_REG		0xFE
 #define TMP401_DEVICE_ID_REG			0xFF
 
-static const u8 TMP401_TEMP_MSB_READ[7][2] = {
-	{ 0x00, 0x01 },	/* temp */
-	{ 0x06, 0x08 },	/* low limit */
-	{ 0x05, 0x07 },	/* high limit */
-	{ 0x20, 0x19 },	/* therm (crit) limit */
-	{ 0x30, 0x34 },	/* lowest */
-	{ 0x32, 0x36 },	/* highest */
-};
-
-static const u8 TMP401_TEMP_MSB_WRITE[7][2] = {
-	{ 0, 0 },	/* temp (unused) */
-	{ 0x0C, 0x0E },	/* low limit */
-	{ 0x0B, 0x0D },	/* high limit */
-	{ 0x20, 0x19 },	/* therm (crit) limit */
-	{ 0x30, 0x34 },	/* lowest */
-	{ 0x32, 0x36 },	/* highest */
-};
-
-static const u8 TMP432_TEMP_MSB_READ[4][3] = {
+static const u8 TMP401_TEMP_MSB[7][3] = {
 	{ 0x00, 0x01, 0x23 },	/* temp */
 	{ 0x06, 0x08, 0x16 },	/* low limit */
 	{ 0x05, 0x07, 0x15 },	/* high limit */
-	{ 0x20, 0x19, 0x1A },	/* therm (crit) limit */
-};
-
-static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
-	{ 0, 0, 0 },		/* temp  - unused */
-	{ 0x0C, 0x0E, 0x16 },	/* low limit */
-	{ 0x0B, 0x0D, 0x15 },	/* high limit */
-	{ 0x20, 0x19, 0x1A },	/* therm (crit) limit */
+	{ 0x20, 0x19, 0x1a },	/* therm (crit) limit */
+	{ 0x30, 0x34, 0x00 },	/* lowest */
+	{ 0x32, 0xf6, 0x00 },	/* highest */
 };
 
 /* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
@@ -131,311 +104,323 @@ MODULE_DEVICE_TABLE(i2c, tmp401_id);
 
 struct tmp401_data {
 	struct i2c_client *client;
-	const struct attribute_group *groups[3];
+	struct regmap *regmap;
 	struct mutex update_lock;
-	bool valid; /* false until following fields are valid */
-	unsigned long last_updated; /* in jiffies */
 	enum chips kind;
 
-	unsigned int update_interval;	/* in milliseconds */
+	bool extended_range;
 
-	/* register values */
-	u8 status[4];
-	u8 config;
-	u16 temp[7][3];
-	u8 temp_crit_hyst;
+	/* hwmon API configuration data */
+	u32 chip_channel_config[4];
+	struct hwmon_channel_info chip_info;
+	u32 temp_channel_config[4];
+	struct hwmon_channel_info temp_info;
+	const struct hwmon_channel_info *info[3];
+	struct hwmon_chip_info chip;
 };
 
-/*
- * Sysfs attr show / store functions
- */
-
-static int tmp401_register_to_temp(u16 reg, u8 config)
-{
-	int temp = reg;
-
-	if (config & TMP401_CONFIG_RANGE)
-		temp -= 64 * 256;
-
-	return DIV_ROUND_CLOSEST(temp * 125, 32);
-}
+/* regmap */
 
-static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
+static bool tmp401_regmap_is_volatile(struct device *dev, unsigned int reg)
 {
-	if (config & TMP401_CONFIG_RANGE) {
-		temp = clamp_val(temp, -64000, 191000);
-		temp += 64000;
-	} else
-		temp = clamp_val(temp, 0, 127000);
-
-	return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
-}
-
-static int tmp401_update_device_reg16(struct i2c_client *client,
-				      struct tmp401_data *data)
-{
-	int i, j, val;
-	int num_regs = data->kind == tmp411 ? 6 : 4;
-	int num_sensors = data->kind == tmp432 ? 3 : 2;
-
-	for (i = 0; i < num_sensors; i++) {		/* local / r1 / r2 */
-		for (j = 0; j < num_regs; j++) {	/* temp / low / ... */
-			u8 regaddr;
-
-			regaddr = data->kind == tmp432 ?
-						TMP432_TEMP_MSB_READ[j][i] :
-						TMP401_TEMP_MSB_READ[j][i];
-			if (j == 3) { /* crit is msb only */
-				val = i2c_smbus_read_byte_data(client, regaddr);
-			} else {
-				val = i2c_smbus_read_word_swapped(client,
-								  regaddr);
-			}
-			if (val < 0)
-				return val;
-
-			data->temp[j][i] = j == 3 ? val << 8 : val;
-		}
+	switch (reg) {
+	case 0:			/* local temp msb */
+	case 1:			/* remote temp msb */
+	case 2:			/* status */
+	case 0x10:		/* remote temp lsb */
+	case 0x15:		/* local temp lsb */
+	case 0x1b:		/* status (tmp432) */
+	case 0x23 ... 0x24:	/* remote temp 2 msb / lsb */
+	case 0x30 ... 0x37:	/* lowest/highest temp; status (tmp432) */
+		return true;
+	default:
+		return false;
 	}
-	return 0;
 }
 
-static struct tmp401_data *tmp401_update_device(struct device *dev)
+static int tmp401_reg_read(void *context, unsigned int reg, unsigned int *val)
 {
-	struct tmp401_data *data = dev_get_drvdata(dev);
+	struct tmp401_data *data = context;
 	struct i2c_client *client = data->client;
-	struct tmp401_data *ret = data;
-	int i, val;
-	unsigned long next_update;
-
-	mutex_lock(&data->update_lock);
+	int regval;
 
-	next_update = data->last_updated +
-		      msecs_to_jiffies(data->update_interval);
-	if (time_after(jiffies, next_update) || !data->valid) {
-		if (data->kind != tmp432) {
-			/*
-			 * The driver uses the TMP432 status format internally.
-			 * Convert status to TMP432 format for other chips.
-			 */
-			val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
-			if (val < 0) {
-				ret = ERR_PTR(val);
-				goto abort;
-			}
-			data->status[0] =
-			  (val & TMP401_STATUS_REMOTE_OPEN) >> 1;
-			data->status[1] =
-			  ((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
-			  ((val & TMP401_STATUS_LOCAL_LOW) >> 5);
-			data->status[2] =
-			  ((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
-			  ((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
-			data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
-						| TMP401_STATUS_REMOTE_CRIT);
-		} else {
-			for (i = 0; i < ARRAY_SIZE(data->status); i++) {
-				val = i2c_smbus_read_byte_data(client,
-							TMP432_STATUS_REG[i]);
-				if (val < 0) {
-					ret = ERR_PTR(val);
-					goto abort;
-				}
-				data->status[i] = val;
-			}
-		}
-
-		val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
-		if (val < 0) {
-			ret = ERR_PTR(val);
-			goto abort;
-		}
-		data->config = val;
-		val = tmp401_update_device_reg16(client, data);
-		if (val < 0) {
-			ret = ERR_PTR(val);
-			goto abort;
+	switch (reg) {
+	case 0:			/* local temp msb */
+	case 1:			/* remote temp msb */
+	case 5:			/* local temp high limit msb */
+	case 6:			/* local temp low limit msb */
+	case 7:			/* remote temp ligh limit msb */
+	case 8:			/* remote temp low limit msb */
+	case 0x15:		/* remote temp 2 high limit msb */
+	case 0x16:		/* remote temp 2 low limit msb */
+	case 0x23:		/* remote temp 2 msb */
+	case 0x30:		/* local temp minimum, tmp411 */
+	case 0x32:		/* local temp maximum, tmp411 */
+	case 0x34:		/* remote temp minimum, tmp411 */
+	case 0xf6:		/* remote temp maximum, tmp411 (really 0x36) */
+		/* work around register overlap between TMP411 and TMP432 */
+		if (reg == 0xf6)
+			reg = 0x36;
+		regval = i2c_smbus_read_word_swapped(client, reg);
+		if (regval < 0)
+			return regval;
+		*val = regval;
+		break;
+	case 0x19:		/* critical limits, 8-bit registers */
+	case 0x1a:
+	case 0x20:
+		regval = i2c_smbus_read_byte_data(client, reg);
+		if (regval < 0)
+			return regval;
+		*val = regval << 8;
+		break;
+	case 0x1b:
+	case 0x35 ... 0x37:
+		if (data->kind == tmp432) {
+			regval = i2c_smbus_read_byte_data(client, reg);
+			if (regval < 0)
+				return regval;
+			*val = regval;
+			break;
 		}
-		val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
-		if (val < 0) {
-			ret = ERR_PTR(val);
-			goto abort;
+		/* simulate TMP432 status registers */
+		regval = i2c_smbus_read_byte_data(client, TMP401_STATUS);
+		if (regval < 0)
+			return regval;
+		*val = 0;
+		switch (reg) {
+		case 0x1b:	/* open / fault */
+			if (regval & TMP401_STATUS_REMOTE_OPEN)
+				*val |= BIT(1);
+			break;
+		case 0x35:	/* high limit */
+			if (regval & TMP401_STATUS_LOCAL_HIGH)
+				*val |= BIT(0);
+			if (regval & TMP401_STATUS_REMOTE_HIGH)
+				*val |= BIT(1);
+			break;
+		case 0x36:	/* low limit */
+			if (regval & TMP401_STATUS_LOCAL_LOW)
+				*val |= BIT(0);
+			if (regval & TMP401_STATUS_REMOTE_LOW)
+				*val |= BIT(1);
+			break;
+		case 0x37:	/* therm / crit limit */
+			if (regval & TMP401_STATUS_LOCAL_CRIT)
+				*val |= BIT(0);
+			if (regval & TMP401_STATUS_REMOTE_CRIT)
+				*val |= BIT(1);
+			break;
 		}
-		data->temp_crit_hyst = val;
-
-		data->last_updated = jiffies;
-		data->valid = true;
+		break;
+	default:
+		regval = i2c_smbus_read_byte_data(client, reg);
+		if (regval < 0)
+			return regval;
+		*val = regval;
+		break;
 	}
-
-abort:
-	mutex_unlock(&data->update_lock);
-	return ret;
+	return 0;
 }
 
-static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
-			 char *buf)
+static int tmp401_reg_write(void *context, unsigned int reg, unsigned int val)
 {
-	int nr = to_sensor_dev_attr_2(devattr)->nr;
-	int index = to_sensor_dev_attr_2(devattr)->index;
-	struct tmp401_data *data = tmp401_update_device(dev);
-
-	if (IS_ERR(data))
-		return PTR_ERR(data);
+	struct tmp401_data *data = context;
+	struct i2c_client *client = data->client;
 
-	return sprintf(buf, "%d\n",
-		tmp401_register_to_temp(data->temp[nr][index], data->config));
+	switch (reg) {
+	case 0x05:		/* local temp high limit msb */
+	case 0x06:		/* local temp low limit msb */
+	case 0x07:		/* remote temp ligh limit msb */
+	case 0x08:		/* remote temp low limit msb */
+		reg += 6;	/* adjust for register write address */
+		fallthrough;
+	case 0x15:		/* remote temp 2 high limit msb */
+	case 0x16:		/* remote temp 2 low limit msb */
+		return i2c_smbus_write_word_swapped(client, reg, val);
+	case 0x19:		/* critical limits, 8-bit registers */
+	case 0x1a:
+	case 0x20:
+		return i2c_smbus_write_byte_data(client, reg, val >> 8);
+	case TMP401_CONVERSION_RATE:
+	case TMP401_CONFIG:
+		reg += 6;	/* adjust for register write address */
+		fallthrough;
+	default:
+		return i2c_smbus_write_byte_data(client, reg, val);
+	}
 }
 
-static ssize_t temp_crit_hyst_show(struct device *dev,
-				   struct device_attribute *devattr,
-				   char *buf)
-{
-	int temp, index = to_sensor_dev_attr(devattr)->index;
-	struct tmp401_data *data = tmp401_update_device(dev);
-
-	if (IS_ERR(data))
-		return PTR_ERR(data);
-
-	mutex_lock(&data->update_lock);
-	temp = tmp401_register_to_temp(data->temp[3][index], data->config);
-	temp -= data->temp_crit_hyst * 1000;
-	mutex_unlock(&data->update_lock);
+static const struct regmap_config tmp401_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.cache_type = REGCACHE_RBTREE,
+	.volatile_reg = tmp401_regmap_is_volatile,
+	.reg_read = tmp401_reg_read,
+	.reg_write = tmp401_reg_write,
+};
 
-	return sprintf(buf, "%d\n", temp);
-}
+/* temperature conversion */
 
-static ssize_t status_show(struct device *dev,
-			   struct device_attribute *devattr, char *buf)
+static int tmp401_register_to_temp(u16 reg, bool extended)
 {
-	int nr = to_sensor_dev_attr_2(devattr)->nr;
-	int mask = to_sensor_dev_attr_2(devattr)->index;
-	struct tmp401_data *data = tmp401_update_device(dev);
+	int temp = reg;
 
-	if (IS_ERR(data))
-		return PTR_ERR(data);
+	if (extended)
+		temp -= 64 * 256;
 
-	return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
+	return DIV_ROUND_CLOSEST(temp * 125, 32);
 }
 
-static ssize_t temp_store(struct device *dev,
-			  struct device_attribute *devattr, const char *buf,
-			  size_t count)
+static u16 tmp401_temp_to_register(long temp, bool extended, int zbits)
 {
-	int nr = to_sensor_dev_attr_2(devattr)->nr;
-	int index = to_sensor_dev_attr_2(devattr)->index;
-	struct tmp401_data *data = dev_get_drvdata(dev);
-	struct i2c_client *client = data->client;
-	long val;
-	u16 reg;
-	u8 regaddr;
-
-	if (kstrtol(buf, 10, &val))
-		return -EINVAL;
-
-	reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
-
-	mutex_lock(&data->update_lock);
-
-	regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
-				       : TMP401_TEMP_MSB_WRITE[nr][index];
-	if (nr == 3) { /* crit is msb only */
-		i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
+	if (extended) {
+		temp = clamp_val(temp, -64000, 191000);
+		temp += 64000;
 	} else {
-		/* Hardware expects big endian data --> use _swapped */
-		i2c_smbus_write_word_swapped(client, regaddr, reg);
+		temp = clamp_val(temp, 0, 127000);
 	}
-	data->temp[nr][index] = reg;
-
-	mutex_unlock(&data->update_lock);
 
-	return count;
+	return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
 }
 
-static ssize_t temp_crit_hyst_store(struct device *dev,
-				    struct device_attribute *devattr,
-				    const char *buf, size_t count)
-{
-	int temp, index = to_sensor_dev_attr(devattr)->index;
-	struct tmp401_data *data = tmp401_update_device(dev);
-	long val;
-	u8 reg;
-
-	if (IS_ERR(data))
-		return PTR_ERR(data);
-
-	if (kstrtol(buf, 10, &val))
-		return -EINVAL;
-
-	if (data->config & TMP401_CONFIG_RANGE)
-		val = clamp_val(val, -64000, 191000);
-	else
-		val = clamp_val(val, 0, 127000);
-
-	mutex_lock(&data->update_lock);
-	temp = tmp401_register_to_temp(data->temp[3][index], data->config);
-	val = clamp_val(val, temp - 255000, temp);
-	reg = ((temp - val) + 500) / 1000;
-
-	i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
-				  reg);
+/* hwmon API functions */
 
-	data->temp_crit_hyst = reg;
+static const u8 tmp401_temp_reg_index[] = {
+	[hwmon_temp_input] = 0,
+	[hwmon_temp_min] = 1,
+	[hwmon_temp_max] = 2,
+	[hwmon_temp_crit] = 3,
+	[hwmon_temp_lowest] = 4,
+	[hwmon_temp_highest] = 5,
+};
 
-	mutex_unlock(&data->update_lock);
+static const u8 tmp401_status_reg_index[] = {
+	[hwmon_temp_fault] = 0,
+	[hwmon_temp_min_alarm] = 1,
+	[hwmon_temp_max_alarm] = 2,
+	[hwmon_temp_crit_alarm] = 3,
+};
 
-	return count;
+static int tmp401_temp_read(struct device *dev, u32 attr, int channel, long *val)
+{
+	struct tmp401_data *data = dev_get_drvdata(dev);
+	struct regmap *regmap = data->regmap;
+	unsigned int regval;
+	int reg, ret;
+
+	switch (attr) {
+	case hwmon_temp_input:
+	case hwmon_temp_min:
+	case hwmon_temp_max:
+	case hwmon_temp_crit:
+	case hwmon_temp_lowest:
+	case hwmon_temp_highest:
+		reg = TMP401_TEMP_MSB[tmp401_temp_reg_index[attr]][channel];
+		ret = regmap_read(regmap, reg, &regval);
+		if (ret < 0)
+			return ret;
+		*val = tmp401_register_to_temp(regval, data->extended_range);
+		break;
+	case hwmon_temp_crit_hyst:
+		mutex_lock(&data->update_lock);
+		reg = TMP401_TEMP_MSB[3][channel];
+		ret = regmap_read(regmap, reg, &regval);
+		if (ret < 0)
+			goto unlock;
+		*val = tmp401_register_to_temp(regval, data->extended_range);
+		ret = regmap_read(regmap, TMP401_TEMP_CRIT_HYST, &regval);
+		if (ret < 0)
+			goto unlock;
+		*val -= regval * 1000;
+unlock:
+		mutex_unlock(&data->update_lock);
+		if (ret < 0)
+			return ret;
+		break;
+	case hwmon_temp_fault:
+	case hwmon_temp_min_alarm:
+	case hwmon_temp_max_alarm:
+	case hwmon_temp_crit_alarm:
+		reg = TMP432_STATUS_REG[tmp401_status_reg_index[attr]];
+		ret = regmap_read(regmap, reg, &regval);
+		if (ret < 0)
+			return ret;
+		*val = !!(regval & BIT(channel));
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+	return 0;
 }
 
-/*
- * Resets the historical measurements of minimum and maximum temperatures.
- * This is done by writing any value to any of the minimum/maximum registers
- * (0x30-0x37).
- */
-static ssize_t reset_temp_history_store(struct device *dev,
-					struct device_attribute *devattr,
-					const char *buf, size_t count)
+static int tmp401_temp_write(struct device *dev, u32 attr, int channel,
+			     long val)
 {
 	struct tmp401_data *data = dev_get_drvdata(dev);
-	struct i2c_client *client = data->client;
-	long val;
-
-	if (kstrtol(buf, 10, &val))
-		return -EINVAL;
+	struct regmap *regmap = data->regmap;
+	unsigned int regval;
+	int reg, ret, temp;
 
-	if (val != 1) {
-		dev_err(dev,
-			"temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
-			val);
-		return -EINVAL;
-	}
 	mutex_lock(&data->update_lock);
-	i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
-	data->valid = false;
+	switch (attr) {
+	case hwmon_temp_min:
+	case hwmon_temp_max:
+	case hwmon_temp_crit:
+		reg = TMP401_TEMP_MSB[tmp401_temp_reg_index[attr]][channel];
+		regval = tmp401_temp_to_register(val, data->extended_range,
+						 attr == hwmon_temp_crit ? 8 : 4);
+		ret = regmap_write(regmap, reg, regval);
+		break;
+	case hwmon_temp_crit_hyst:
+		if (data->extended_range)
+			val = clamp_val(val, -64000, 191000);
+		else
+			val = clamp_val(val, 0, 127000);
+
+		reg = TMP401_TEMP_MSB[3][channel];
+		ret = regmap_read(regmap, reg, &regval);
+		if (ret < 0)
+			break;
+		temp = tmp401_register_to_temp(regval, data->extended_range);
+		val = clamp_val(val, temp - 255000, temp);
+		regval = ((temp - val) + 500) / 1000;
+		ret = regmap_write(regmap, TMP401_TEMP_CRIT_HYST, regval);
+		break;
+	default:
+		ret = -EOPNOTSUPP;
+		break;
+	}
 	mutex_unlock(&data->update_lock);
-
-	return count;
+	return ret;
 }
 
-static ssize_t update_interval_show(struct device *dev,
-				    struct device_attribute *attr, char *buf)
+static int tmp401_chip_read(struct device *dev, u32 attr, int channel, long *val)
 {
 	struct tmp401_data *data = dev_get_drvdata(dev);
+	u32 regval;
+	int ret;
+
+	switch (attr) {
+	case hwmon_chip_update_interval:
+		ret = regmap_read(data->regmap, TMP401_CONVERSION_RATE, &regval);
+		if (ret < 0)
+			return ret;
+		*val = (1 << (7 - regval)) * 125;
+		break;
+	case hwmon_chip_temp_reset_history:
+		*val = 0;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
 
-	return sprintf(buf, "%u\n", data->update_interval);
+	return 0;
 }
 
-static ssize_t update_interval_store(struct device *dev,
-				     struct device_attribute *attr,
-				     const char *buf, size_t count)
+static int tmp401_set_convrate(struct regmap *regmap, long val)
 {
-	struct tmp401_data *data = dev_get_drvdata(dev);
-	struct i2c_client *client = data->client;
-	unsigned long val;
-	int err, rate;
-
-	err = kstrtoul(buf, 10, &val);
-	if (err)
-		return err;
+	int rate;
 
 	/*
 	 * For valid rates, interval can be calculated as
@@ -447,153 +432,137 @@ static ssize_t update_interval_store(struct device *dev,
 	 */
 	val = clamp_val(val, 125, 16000);
 	rate = 7 - __fls(val * 4 / (125 * 3));
+	return regmap_write(regmap, TMP401_CONVERSION_RATE, rate);
+}
+
+static int tmp401_chip_write(struct device *dev, u32 attr, int channel, long val)
+{
+	struct tmp401_data *data = dev_get_drvdata(dev);
+	struct regmap *regmap = data->regmap;
+	int err;
+
 	mutex_lock(&data->update_lock);
-	i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
-	data->update_interval = (1 << (7 - rate)) * 125;
+	switch (attr) {
+	case hwmon_chip_update_interval:
+		err = tmp401_set_convrate(regmap, val);
+		break;
+	case hwmon_chip_temp_reset_history:
+		if (val != 1) {
+			err = -EINVAL;
+			break;
+		}
+		/*
+		 * Reset history by writing any value to any of the
+		 * minimum/maximum registers (0x30-0x37).
+		 */
+		err = regmap_write(regmap, 0x30, 0);
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
 	mutex_unlock(&data->update_lock);
 
-	return count;
+	return err;
 }
 
-static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, 0, 0);
-static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 1, 0);
-static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 2, 0);
-static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 3, 0);
-static SENSOR_DEVICE_ATTR_RW(temp1_crit_hyst, temp_crit_hyst, 0);
-static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, status, 1,
-			       TMP432_STATUS_LOCAL);
-static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, status, 2,
-			       TMP432_STATUS_LOCAL);
-static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, status, 3,
-			       TMP432_STATUS_LOCAL);
-static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, 0, 1);
-static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 1, 1);
-static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 2, 1);
-static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 3, 1);
-static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, temp_crit_hyst, 1);
-static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, status, 0, TMP432_STATUS_REMOTE1);
-static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, status, 1,
-			       TMP432_STATUS_REMOTE1);
-static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, status, 2,
-			       TMP432_STATUS_REMOTE1);
-static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, status, 3,
-			       TMP432_STATUS_REMOTE1);
-
-static DEVICE_ATTR_RW(update_interval);
-
-static struct attribute *tmp401_attributes[] = {
-	&sensor_dev_attr_temp1_input.dev_attr.attr,
-	&sensor_dev_attr_temp1_min.dev_attr.attr,
-	&sensor_dev_attr_temp1_max.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
-	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
-
-	&sensor_dev_attr_temp2_input.dev_attr.attr,
-	&sensor_dev_attr_temp2_min.dev_attr.attr,
-	&sensor_dev_attr_temp2_max.dev_attr.attr,
-	&sensor_dev_attr_temp2_crit.dev_attr.attr,
-	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
-	&sensor_dev_attr_temp2_fault.dev_attr.attr,
-	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
-
-	&dev_attr_update_interval.attr,
-
-	NULL
-};
-
-static const struct attribute_group tmp401_group = {
-	.attrs = tmp401_attributes,
-};
-
-/*
- * Additional features of the TMP411 chip.
- * The TMP411 stores the minimum and maximum
- * temperature measured since power-on, chip-reset, or
- * minimum and maximum register reset for both the local
- * and remote channels.
- */
-static SENSOR_DEVICE_ATTR_2_RO(temp1_lowest, temp, 4, 0);
-static SENSOR_DEVICE_ATTR_2_RO(temp1_highest, temp, 5, 0);
-static SENSOR_DEVICE_ATTR_2_RO(temp2_lowest, temp, 4, 1);
-static SENSOR_DEVICE_ATTR_2_RO(temp2_highest, temp, 5, 1);
-static SENSOR_DEVICE_ATTR_WO(temp_reset_history, reset_temp_history, 0);
-
-static struct attribute *tmp411_attributes[] = {
-	&sensor_dev_attr_temp1_highest.dev_attr.attr,
-	&sensor_dev_attr_temp1_lowest.dev_attr.attr,
-	&sensor_dev_attr_temp2_highest.dev_attr.attr,
-	&sensor_dev_attr_temp2_lowest.dev_attr.attr,
-	&sensor_dev_attr_temp_reset_history.dev_attr.attr,
-	NULL
-};
+static int tmp401_read(struct device *dev, enum hwmon_sensor_types type,
+		       u32 attr, int channel, long *val)
+{
+	switch (type) {
+	case hwmon_chip:
+		return tmp401_chip_read(dev, attr, channel, val);
+	case hwmon_temp:
+		return tmp401_temp_read(dev, attr, channel, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
 
-static const struct attribute_group tmp411_group = {
-	.attrs = tmp411_attributes,
-};
+static int tmp401_write(struct device *dev, enum hwmon_sensor_types type,
+			u32 attr, int channel, long val)
+{
+	switch (type) {
+	case hwmon_chip:
+		return tmp401_chip_write(dev, attr, channel, val);
+	case hwmon_temp:
+		return tmp401_temp_write(dev, attr, channel, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
 
-static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, 0, 2);
-static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 1, 2);
-static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, 2);
-static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 3, 2);
-static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, temp_crit_hyst, 2);
-static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, status, 0, TMP432_STATUS_REMOTE2);
-static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, status, 1,
-			       TMP432_STATUS_REMOTE2);
-static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, status, 2,
-			       TMP432_STATUS_REMOTE2);
-static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, status, 3,
-			       TMP432_STATUS_REMOTE2);
-
-static struct attribute *tmp432_attributes[] = {
-	&sensor_dev_attr_temp3_input.dev_attr.attr,
-	&sensor_dev_attr_temp3_min.dev_attr.attr,
-	&sensor_dev_attr_temp3_max.dev_attr.attr,
-	&sensor_dev_attr_temp3_crit.dev_attr.attr,
-	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
-	&sensor_dev_attr_temp3_fault.dev_attr.attr,
-	&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
-
-	NULL
-};
+static umode_t tmp401_is_visible(const void *data, enum hwmon_sensor_types type,
+				 u32 attr, int channel)
+{
+	switch (type) {
+	case hwmon_chip:
+		switch (attr) {
+		case hwmon_chip_update_interval:
+		case hwmon_chip_temp_reset_history:
+			return 0644;
+		default:
+			break;
+		}
+		break;
+	case hwmon_temp:
+		switch (attr) {
+		case hwmon_temp_input:
+		case hwmon_temp_min_alarm:
+		case hwmon_temp_max_alarm:
+		case hwmon_temp_crit_alarm:
+		case hwmon_temp_fault:
+		case hwmon_temp_lowest:
+		case hwmon_temp_highest:
+			return 0444;
+		case hwmon_temp_min:
+		case hwmon_temp_max:
+		case hwmon_temp_crit:
+		case hwmon_temp_crit_hyst:
+			return 0644;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
 
-static const struct attribute_group tmp432_group = {
-	.attrs = tmp432_attributes,
+static const struct hwmon_ops tmp401_ops = {
+	.is_visible = tmp401_is_visible,
+	.read = tmp401_read,
+	.write = tmp401_write,
 };
 
-/*
- * Begin non sysfs callback code (aka Real code)
- */
+/* chip initialization, detect, probe */
 
-static int tmp401_init_client(struct tmp401_data *data,
-			      struct i2c_client *client)
+static int tmp401_init_client(struct tmp401_data *data)
 {
-	int config, config_orig, status = 0;
+	struct regmap *regmap = data->regmap;
+	u32 config, config_orig;
+	int ret;
 
-	/* Set the conversion rate to 2 Hz */
-	i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
-	data->update_interval = 500;
+	/* Set conversion rate to 2 Hz */
+	ret = regmap_write(regmap, TMP401_CONVERSION_RATE, 5);
+	if (ret < 0)
+		return ret;
 
 	/* Start conversions (disable shutdown if necessary) */
-	config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
-	if (config < 0)
-		return config;
+	ret = regmap_read(regmap, TMP401_CONFIG, &config);
+	if (ret < 0)
+		return ret;
 
 	config_orig = config;
 	config &= ~TMP401_CONFIG_SHUTDOWN;
 
+	data->extended_range = !!(config & TMP401_CONFIG_RANGE);
+
 	if (config != config_orig)
-		status = i2c_smbus_write_byte_data(client,
-						   TMP401_CONFIG_WRITE,
-						   config);
+		ret = regmap_write(regmap, TMP401_CONFIG, config);
 
-	return status;
+	return ret;
 }
 
 static int tmp401_detect(struct i2c_client *client,
@@ -651,11 +620,11 @@ static int tmp401_detect(struct i2c_client *client,
 		return -ENODEV;
 	}
 
-	reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
+	reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG);
 	if (reg & 0x1b)
 		return -ENODEV;
 
-	reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
+	reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE);
 	/* Datasheet says: 0x1-0x6 */
 	if (reg > 15)
 		return -ENODEV;
@@ -671,9 +640,10 @@ static int tmp401_probe(struct i2c_client *client)
 		"TMP401", "TMP411", "TMP431", "TMP432", "TMP435"
 	};
 	struct device *dev = &client->dev;
+	struct hwmon_channel_info *info;
 	struct device *hwmon_dev;
 	struct tmp401_data *data;
-	int groups = 0, status;
+	int status;
 
 	data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
 	if (!data)
@@ -683,24 +653,53 @@ static int tmp401_probe(struct i2c_client *client)
 	mutex_init(&data->update_lock);
 	data->kind = i2c_match_id(tmp401_id, client)->driver_data;
 
-	/* Initialize the TMP401 chip */
-	status = tmp401_init_client(data, client);
-	if (status < 0)
-		return status;
+	data->regmap = devm_regmap_init(dev, NULL, data, &tmp401_regmap_config);
+	if (IS_ERR(data->regmap))
+		return PTR_ERR(data->regmap);
 
-	/* Register sysfs hooks */
-	data->groups[groups++] = &tmp401_group;
+	/* initialize configuration data */
+	data->chip.ops = &tmp401_ops;
+	data->chip.info = data->info;
 
-	/* Register additional tmp411 sysfs hooks */
-	if (data->kind == tmp411)
-		data->groups[groups++] = &tmp411_group;
+	data->info[0] = &data->chip_info;
+	data->info[1] = &data->temp_info;
 
-	/* Register additional tmp432 sysfs hooks */
-	if (data->kind == tmp432)
-		data->groups[groups++] = &tmp432_group;
+	info = &data->chip_info;
+	info->type = hwmon_chip;
+	info->config = data->chip_channel_config;
+
+	data->chip_channel_config[0] = HWMON_C_UPDATE_INTERVAL;
+
+	info = &data->temp_info;
+	info->type = hwmon_temp;
+	info->config = data->temp_channel_config;
+
+	data->temp_channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
+		HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
+		HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM;
+	data->temp_channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
+		HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
+		HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT;
+
+	if (data->kind == tmp411) {
+		data->temp_channel_config[0] |= HWMON_T_HIGHEST | HWMON_T_LOWEST;
+		data->temp_channel_config[1] |= HWMON_T_HIGHEST | HWMON_T_LOWEST;
+		data->chip_channel_config[0] |= HWMON_C_TEMP_RESET_HISTORY;
+	}
+
+	if (data->kind == tmp432) {
+		data->temp_channel_config[2] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
+			HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
+			HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT;
+	}
+
+	/* Initialize the TMP401 chip */
+	status = tmp401_init_client(data);
+	if (status < 0)
+		return status;
 
-	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
-							   data, data->groups);
+	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
+							 &data->chip, NULL);
 	if (IS_ERR(hwmon_dev))
 		return PTR_ERR(hwmon_dev);