Merge tag 'hwmon-for-linus-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 "Notable hwmon changes:

   - Add basic support for NCT6683 on Mitac boards
   - Add support for AMD new 15h processors to fam15h_power driver
   - Add pmbus client driver for LTC3815
   - Remove htu21 driver (now supported by iio subsystem)"

* tag 'hwmon-for-linus-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (nct6683) Add basic support for NCT6683 on Mitac boards
  hwmon: (ibmaem) constify aem_rw_sensor_template and aem_ro_sensor_template structures
  hwmon: (nct6683,nct6775) constify sensor_template_group structures
  MAINTAINERS: change the maintainer of fam15h_power driver
  hwmon: (fam15h_power) Add support for AMD new 15h processors
  hwmon: (pmbus) Add client driver for LTC3815
  hwmon: (htu21) Remove driver

10 files changed, 310 insertions, 220 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 80a73bfc1a65..60fb80bd353d 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -859,16 +859,6 @@ config SENSORS_MAX31790
 	  This driver can also be built as a module.  If so, the module
 	  will be called max31790.
 
-config SENSORS_HTU21
-	tristate "Measurement Specialties HTU21D humidity/temperature sensors"
-	depends on I2C
-	help
-	  If you say yes here you get support for the Measurement Specialties
-	  HTU21D humidity and temperature sensors.
-
-	  This driver can also be built as a module.  If so, the module
-	  will be called htu21.
-
 config SENSORS_MCP3021
 	tristate "Microchip MCP3021 and compatibles"
 	depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 12a32398fdcc..30c94df31465 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -68,7 +68,6 @@ obj-$(CONFIG_SENSORS_GL518SM)	+= gl518sm.o
 obj-$(CONFIG_SENSORS_GL520SM)	+= gl520sm.o
 obj-$(CONFIG_SENSORS_GPIO_FAN)	+= gpio-fan.o
 obj-$(CONFIG_SENSORS_HIH6130)	+= hih6130.o
-obj-$(CONFIG_SENSORS_HTU21)	+= htu21.o
 obj-$(CONFIG_SENSORS_ULTRA45)	+= ultra45_env.o
 obj-$(CONFIG_SENSORS_I5500)	+= i5500_temp.o
 obj-$(CONFIG_SENSORS_I5K_AMB)	+= i5k_amb.o
diff --git a/drivers/hwmon/fam15h_power.c b/drivers/hwmon/fam15h_power.c
index 5f7067d7b625..f77eb971ce95 100644
--- a/drivers/hwmon/fam15h_power.c
+++ b/drivers/hwmon/fam15h_power.c
@@ -47,6 +47,8 @@ MODULE_LICENSE("GPL");
 
 #define MSR_F15H_CU_MAX_PWR_ACCUMULATOR	0xc001007b
 
+#define PCI_DEVICE_ID_AMD_15H_M70H_NB_F4 0x15b4
+
 struct fam15h_power_data {
 	struct pci_dev *pdev;
 	unsigned int tdp_to_watts;
@@ -124,7 +126,7 @@ static int fam15h_power_init_attrs(struct pci_dev *pdev,
 
 	if (c->x86 == 0x15 &&
 	    (c->x86_model <= 0xf ||
-	     (c->x86_model >= 0x60 && c->x86_model <= 0x6f)))
+	     (c->x86_model >= 0x60 && c->x86_model <= 0x7f)))
 		n += 1;
 
 	fam15h_power_attrs = devm_kcalloc(&pdev->dev, n,
@@ -138,7 +140,7 @@ static int fam15h_power_init_attrs(struct pci_dev *pdev,
 	fam15h_power_attrs[n++] = &dev_attr_power1_crit.attr;
 	if (c->x86 == 0x15 &&
 	    (c->x86_model <= 0xf ||
-	     (c->x86_model >= 0x60 && c->x86_model <= 0x6f)))
+	     (c->x86_model >= 0x60 && c->x86_model <= 0x7f)))
 		fam15h_power_attrs[n++] = &dev_attr_power1_input.attr;
 
 	data->group.attrs = fam15h_power_attrs;
@@ -296,6 +298,7 @@ static const struct pci_device_id fam15h_power_id_table[] = {
 	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_F4) },
 	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F4) },
 	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F4) },
+	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M70H_NB_F4) },
 	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_NB_F4) },
 	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F4) },
 	{}
diff --git a/drivers/hwmon/htu21.c b/drivers/hwmon/htu21.c
deleted file mode 100644
index 4c3bbb72f82a..000000000000
--- a/drivers/hwmon/htu21.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/*
- * Measurement Specialties HTU21D humidity and temperature sensor driver
- *
- * Copyright (C) 2013 William Markezana <william.markezana@meas-spec.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/i2c.h>
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/err.h>
-#include <linux/mutex.h>
-#include <linux/device.h>
-#include <linux/jiffies.h>
-
-/* HTU21 Commands */
-#define HTU21_T_MEASUREMENT_HM	0xE3
-#define HTU21_RH_MEASUREMENT_HM	0xE5
-
-struct htu21 {
-	struct i2c_client *client;
-	struct mutex lock;
-	bool valid;
-	unsigned long last_update;
-	int temperature;
-	int humidity;
-};
-
-static inline int htu21_temp_ticks_to_millicelsius(int ticks)
-{
-	ticks &= ~0x0003; /* clear status bits */
-	/*
-	 * Formula T = -46.85 + 175.72 * ST / 2^16 from datasheet p14,
-	 * optimized for integer fixed point (3 digits) arithmetic
-	 */
-	return ((21965 * ticks) >> 13) - 46850;
-}
-
-static inline int htu21_rh_ticks_to_per_cent_mille(int ticks)
-{
-	ticks &= ~0x0003; /* clear status bits */
-	/*
-	 * Formula RH = -6 + 125 * SRH / 2^16 from datasheet p14,
-	 * optimized for integer fixed point (3 digits) arithmetic
-	 */
-	return ((15625 * ticks) >> 13) - 6000;
-}
-
-static int htu21_update_measurements(struct device *dev)
-{
-	struct htu21 *htu21 = dev_get_drvdata(dev);
-	struct i2c_client *client = htu21->client;
-	int ret = 0;
-
-	mutex_lock(&htu21->lock);
-
-	if (time_after(jiffies, htu21->last_update + HZ / 2) ||
-	    !htu21->valid) {
-		ret = i2c_smbus_read_word_swapped(client,
-						  HTU21_T_MEASUREMENT_HM);
-		if (ret < 0)
-			goto out;
-		htu21->temperature = htu21_temp_ticks_to_millicelsius(ret);
-		ret = i2c_smbus_read_word_swapped(client,
-						  HTU21_RH_MEASUREMENT_HM);
-		if (ret < 0)
-			goto out;
-		htu21->humidity = htu21_rh_ticks_to_per_cent_mille(ret);
-		htu21->last_update = jiffies;
-		htu21->valid = true;
-	}
-out:
-	mutex_unlock(&htu21->lock);
-
-	return ret >= 0 ? 0 : ret;
-}
-
-static ssize_t htu21_show_temperature(struct device *dev,
-				      struct device_attribute *attr, char *buf)
-{
-	struct htu21 *htu21 = dev_get_drvdata(dev);
-	int ret;
-
-	ret = htu21_update_measurements(dev);
-	if (ret < 0)
-		return ret;
-	return sprintf(buf, "%d\n", htu21->temperature);
-}
-
-static ssize_t htu21_show_humidity(struct device *dev,
-				   struct device_attribute *attr, char *buf)
-{
-	struct htu21 *htu21 = dev_get_drvdata(dev);
-	int ret;
-
-	ret = htu21_update_measurements(dev);
-	if (ret < 0)
-		return ret;
-	return sprintf(buf, "%d\n", htu21->humidity);
-}
-
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
-			  htu21_show_temperature, NULL, 0);
-static SENSOR_DEVICE_ATTR(humidity1_input, S_IRUGO,
-			  htu21_show_humidity, NULL, 0);
-
-static struct attribute *htu21_attrs[] = {
-	&sensor_dev_attr_temp1_input.dev_attr.attr,
-	&sensor_dev_attr_humidity1_input.dev_attr.attr,
-	NULL
-};
-
-ATTRIBUTE_GROUPS(htu21);
-
-static int htu21_probe(struct i2c_client *client,
-		       const struct i2c_device_id *id)
-{
-	struct device *dev = &client->dev;
-	struct htu21 *htu21;
-	struct device *hwmon_dev;
-
-	if (!i2c_check_functionality(client->adapter,
-				     I2C_FUNC_SMBUS_READ_WORD_DATA)) {
-		dev_err(&client->dev,
-			"adapter does not support SMBus word transactions\n");
-		return -ENODEV;
-	}
-
-	htu21 = devm_kzalloc(dev, sizeof(*htu21), GFP_KERNEL);
-	if (!htu21)
-		return -ENOMEM;
-
-	htu21->client = client;
-	mutex_init(&htu21->lock);
-
-	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
-							   htu21,
-							   htu21_groups);
-	return PTR_ERR_OR_ZERO(hwmon_dev);
-}
-
-static const struct i2c_device_id htu21_id[] = {
-	{ "htu21", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, htu21_id);
-
-static struct i2c_driver htu21_driver = {
-	.class = I2C_CLASS_HWMON,
-	.driver = {
-		.name	= "htu21",
-	},
-	.probe       = htu21_probe,
-	.id_table    = htu21_id,
-};
-
-module_i2c_driver(htu21_driver);
-
-MODULE_AUTHOR("William Markezana <william.markezana@meas-spec.com>");
-MODULE_DESCRIPTION("MEAS HTU21D humidity and temperature sensor driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
index 7a8a6fbf11ff..1f643782ce04 100644
--- a/drivers/hwmon/ibmaem.c
+++ b/drivers/hwmon/ibmaem.c
@@ -920,8 +920,8 @@ static ssize_t aem_set_power_period(struct device *dev,
 
 /* Discover sensors on an AEM device */
 static int aem_register_sensors(struct aem_data *data,
-				struct aem_ro_sensor_template *ro,
-				struct aem_rw_sensor_template *rw)
+				const struct aem_ro_sensor_template *ro,
+				const struct aem_rw_sensor_template *rw)
 {
 	struct device *dev = &data->pdev->dev;
 	struct sensor_device_attribute *sensors = data->sensors;
@@ -1020,19 +1020,19 @@ static void aem_remove_sensors(struct aem_data *data)
 /* Sensor probe functions */
 
 /* Description of AEM1 sensors */
-static struct aem_ro_sensor_template aem1_ro_sensors[] = {
+static const struct aem_ro_sensor_template aem1_ro_sensors[] = {
 {"energy1_input",  aem_show_energy, 0},
 {"power1_average", aem_show_power,  0},
 {NULL,		   NULL,	    0},
 };
 
-static struct aem_rw_sensor_template aem1_rw_sensors[] = {
+static const struct aem_rw_sensor_template aem1_rw_sensors[] = {
 {"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
 {NULL,			    NULL,                  NULL,                 0},
 };
 
 /* Description of AEM2 sensors */
-static struct aem_ro_sensor_template aem2_ro_sensors[] = {
+static const struct aem_ro_sensor_template aem2_ro_sensors[] = {
 {"energy1_input",	  aem_show_energy,	0},
 {"energy2_input",	  aem_show_energy,	1},
 {"power1_average",	  aem_show_power,	0},
@@ -1050,7 +1050,7 @@ static struct aem_ro_sensor_template aem2_ro_sensors[] = {
 {NULL,                    NULL,                 0},
 };
 
-static struct aem_rw_sensor_template aem2_rw_sensors[] = {
+static const struct aem_rw_sensor_template aem2_rw_sensors[] = {
 {"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
 {"power2_average_interval", aem_show_power_period, aem_set_power_period, 1},
 {NULL,			    NULL,                  NULL,                 0},
diff --git a/drivers/hwmon/nct6683.c b/drivers/hwmon/nct6683.c
index 37f01702d081..559c596b24f9 100644
--- a/drivers/hwmon/nct6683.c
+++ b/drivers/hwmon/nct6683.c
@@ -29,7 +29,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/acpi.h>
-#include <linux/dmi.h>
+#include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/io.h>
@@ -45,7 +45,7 @@ enum kinds { nct6683 };
 
 static bool force;
 module_param(force, bool, 0);
-MODULE_PARM_DESC(force, "Set to one to enable detection on non-Intel boards");
+MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors");
 
 static const char * const nct6683_device_names[] = {
 	"nct6683",
@@ -141,6 +141,7 @@ superio_exit(int ioreg)
 #define NCT6683_REG_MON(x)		(0x100 + (x) * 2)
 #define NCT6683_REG_FAN_RPM(x)		(0x140 + (x) * 2)
 #define NCT6683_REG_PWM(x)		(0x160 + (x))
+#define NCT6683_REG_PWM_WRITE(x)	(0xa28 + (x))
 
 #define NCT6683_REG_MON_STS(x)		(0x174 + (x))
 #define NCT6683_REG_IDLE(x)		(0x178 + (x))
@@ -165,8 +166,13 @@ superio_exit(int ioreg)
 
 #define NCT6683_REG_FAN_MIN(x)		(0x3b8 + (x) * 2)	/* 16 bit */
 
+#define NCT6683_REG_FAN_CFG_CTRL	0xa01
+#define NCT6683_FAN_CFG_REQ		0x80
+#define NCT6683_FAN_CFG_DONE		0x40
+
 #define NCT6683_REG_CUSTOMER_ID		0x602
 #define NCT6683_CUSTOMER_ID_INTEL	0x805
+#define NCT6683_CUSTOMER_ID_MITAC	0xa0e
 
 #define NCT6683_REG_BUILD_YEAR		0x604
 #define NCT6683_REG_BUILD_MONTH		0x605
@@ -394,7 +400,8 @@ struct sensor_template_group {
 };
 
 static struct attribute_group *
-nct6683_create_attr_group(struct device *dev, struct sensor_template_group *tg,
+nct6683_create_attr_group(struct device *dev,
+			  const struct sensor_template_group *tg,
 			  int repeat)
 {
 	struct sensor_device_attribute_2 *a2;
@@ -559,6 +566,7 @@ static int get_temp_reg(struct nct6683_data *data, int nr, int index)
 			break;
 		}
 		break;
+	case NCT6683_CUSTOMER_ID_MITAC:
 	default:
 		switch (nr) {
 		default:
@@ -703,7 +711,7 @@ static struct sensor_device_template *nct6683_attributes_in_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6683_in_template_group = {
+static const struct sensor_template_group nct6683_in_template_group = {
 	.templates = nct6683_attributes_in_template,
 	.is_visible = nct6683_in_is_visible,
 };
@@ -774,7 +782,7 @@ static struct sensor_device_template *nct6683_attributes_fan_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6683_fan_template_group = {
+static const struct sensor_template_group nct6683_fan_template_group = {
 	.templates = nct6683_attributes_fan_template,
 	.is_visible = nct6683_fan_is_visible,
 	.base = 1,
@@ -902,7 +910,7 @@ static struct sensor_device_template *nct6683_attributes_temp_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6683_temp_template_group = {
+static const struct sensor_template_group nct6683_temp_template_group = {
 	.templates = nct6683_attributes_temp_template,
 	.is_visible = nct6683_temp_is_visible,
 	.base = 1,
@@ -918,7 +926,29 @@ show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 	return sprintf(buf, "%d\n", data->pwm[index]);
 }
 
-SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, NULL, 0);
+static ssize_t
+store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
+	  size_t count)
+{
+	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+	struct nct6683_data *data = dev_get_drvdata(dev);
+	int index = sattr->index;
+	unsigned long val;
+
+	if (kstrtoul(buf, 10, &val) || val > 255)
+		return -EINVAL;
+
+	mutex_lock(&data->update_lock);
+	nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ);
+	usleep_range(1000, 2000);
+	nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val);
+	nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE);
+	mutex_unlock(&data->update_lock);
+
+	return count;
+}
+
+SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
 
 static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
 				      struct attribute *attr, int index)
@@ -930,6 +960,10 @@ static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
 	if (!(data->have_pwm & (1 << pwm)))
 		return 0;
 
+	/* Only update pwm values for Mitac boards */
+	if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC)
+		return attr->mode | S_IWUSR;
+
 	return attr->mode;
 }
 
@@ -938,7 +972,7 @@ static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6683_pwm_template_group = {
+static const struct sensor_template_group nct6683_pwm_template_group = {
 	.templates = nct6683_attributes_pwm_template,
 	.is_visible = nct6683_pwm_is_visible,
 	.base = 1,
@@ -1170,6 +1204,7 @@ static int nct6683_probe(struct platform_device *pdev)
 	struct device *hwmon_dev;
 	struct resource *res;
 	int groups = 0;
+	char build[16];
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 	if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
@@ -1187,6 +1222,17 @@ static int nct6683_probe(struct platform_device *pdev)
 
 	data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
 
+	/* By default only instantiate driver if the customer ID is known */
+	switch (data->customer_id) {
+	case NCT6683_CUSTOMER_ID_INTEL:
+		break;
+	case NCT6683_CUSTOMER_ID_MITAC:
+		break;
+	default:
+		if (!force)
+			return -ENODEV;
+	}
+
 	nct6683_init_device(data);
 	nct6683_setup_fans(data);
 	nct6683_setup_sensors(data);
@@ -1230,13 +1276,22 @@ static int nct6683_probe(struct platform_device *pdev)
 	}
 	data->groups[groups++] = &nct6683_group_other;
 
-	dev_info(dev, "%s EC firmware version %d.%d build %02x/%02x/%02x\n",
+	if (data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
+		scnprintf(build, sizeof(build), "%02x/%02x/%02x",
+			  nct6683_read(data, NCT6683_REG_BUILD_MONTH),
+			  nct6683_read(data, NCT6683_REG_BUILD_DAY),
+			  nct6683_read(data, NCT6683_REG_BUILD_YEAR));
+	else
+		scnprintf(build, sizeof(build), "%02d/%02d/%02d",
+			  nct6683_read(data, NCT6683_REG_BUILD_MONTH),
+			  nct6683_read(data, NCT6683_REG_BUILD_DAY),
+			  nct6683_read(data, NCT6683_REG_BUILD_YEAR));
+
+	dev_info(dev, "%s EC firmware version %d.%d build %s\n",
 		 nct6683_chip_names[data->kind],
 		 nct6683_read(data, NCT6683_REG_VERSION_HI),
 		 nct6683_read(data, NCT6683_REG_VERSION_LO),
-		 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
-		 nct6683_read(data, NCT6683_REG_BUILD_DAY),
-		 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
+		 build);
 
 	hwmon_dev = devm_hwmon_device_register_with_groups(dev,
 			nct6683_device_names[data->kind], data, data->groups);
@@ -1292,20 +1347,10 @@ static struct platform_driver nct6683_driver = {
 
 static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data)
 {
-	const char *board_vendor;
 	int addr;
 	u16 val;
 	int err;
 
-	/*
-	 * Only run on Intel boards unless the 'force' module parameter is set
-	 */
-	if (!force) {
-		board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
-		if (!board_vendor || strcmp(board_vendor, "Intel Corporation"))
-			return -ENODEV;
-	}
-
 	err = superio_enter(sioaddr);
 	if (err)
 		return err;
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index d7ebdf8651f5..d087a8e00cf5 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -1045,7 +1045,8 @@ struct sensor_template_group {
 };
 
 static struct attribute_group *
-nct6775_create_attr_group(struct device *dev, struct sensor_template_group *tg,
+nct6775_create_attr_group(struct device *dev,
+			  const struct sensor_template_group *tg,
 			  int repeat)
 {
 	struct attribute_group *group;
@@ -1827,7 +1828,7 @@ static struct sensor_device_template *nct6775_attributes_in_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6775_in_template_group = {
+static const struct sensor_template_group nct6775_in_template_group = {
 	.templates = nct6775_attributes_in_template,
 	.is_visible = nct6775_in_is_visible,
 };
@@ -2046,7 +2047,7 @@ static struct sensor_device_template *nct6775_attributes_fan_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6775_fan_template_group = {
+static const struct sensor_template_group nct6775_fan_template_group = {
 	.templates = nct6775_attributes_fan_template,
 	.is_visible = nct6775_fan_is_visible,
 	.base = 1,
@@ -2255,7 +2256,7 @@ static struct sensor_device_template *nct6775_attributes_temp_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6775_temp_template_group = {
+static const struct sensor_template_group nct6775_temp_template_group = {
 	.templates = nct6775_attributes_temp_template,
 	.is_visible = nct6775_temp_is_visible,
 	.base = 1,
@@ -3117,7 +3118,7 @@ static struct sensor_device_template *nct6775_attributes_pwm_template[] = {
 	NULL
 };
 
-static struct sensor_template_group nct6775_pwm_template_group = {
+static const struct sensor_template_group nct6775_pwm_template_group = {
 	.templates = nct6775_attributes_pwm_template,
 	.is_visible = nct6775_pwm_is_visible,
 	.base = 1,
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index df6ebb2b8f0f..7e5cc3d025ef 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -65,6 +65,16 @@ config SENSORS_LTC2978_REGULATOR
 	  If you say yes here you get regulator support for Linear
 	  Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, and LTM4676.
 
+config SENSORS_LTC3815
+	tristate "Linear Technologies LTC3815"
+	default n
+	help
+	  If you say yes here you get hardware monitoring support for Linear
+	  Technology LTC3815.
+
+	  This driver can also be built as a module. If so, the module will
+	  be called ltc3815.
+
 config SENSORS_MAX16064
 	tristate "Maxim MAX16064"
 	default n
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index bce046d37f02..562132054aaf 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_SENSORS_PMBUS)	+= pmbus.o
 obj-$(CONFIG_SENSORS_ADM1275)	+= adm1275.o
 obj-$(CONFIG_SENSORS_LM25066)	+= lm25066.o
 obj-$(CONFIG_SENSORS_LTC2978)	+= ltc2978.o
+obj-$(CONFIG_SENSORS_LTC3815)	+= ltc3815.o
 obj-$(CONFIG_SENSORS_MAX16064)	+= max16064.o
 obj-$(CONFIG_SENSORS_MAX20751)	+= max20751.o
 obj-$(CONFIG_SENSORS_MAX34440)	+= max34440.o
diff --git a/drivers/hwmon/pmbus/ltc3815.c b/drivers/hwmon/pmbus/ltc3815.c
new file mode 100644
index 000000000000..bb32e6276622
--- /dev/null
+++ b/drivers/hwmon/pmbus/ltc3815.c
@@ -0,0 +1,215 @@
+/*
+ * Hardware monitoring driver for LTC3815
+ *
+ * Copyright (c) 2015 Linear Technology
+ * Copyright (c) 2015 Guenter Roeck
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include "pmbus.h"
+
+#define LTC3815_MFR_IOUT_PEAK	0xd7
+#define LTC3815_MFR_VOUT_PEAK	0xdd
+#define LTC3815_MFR_VIN_PEAK	0xde
+#define LTC3815_MFR_TEMP_PEAK	0xdf
+#define LTC3815_MFR_IIN_PEAK	0xe1
+#define LTC3815_MFR_SPECIAL_ID	0xe7
+
+#define LTC3815_ID		0x8000
+#define LTC3815_ID_MASK		0xff00
+
+static int ltc3815_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+	int ret;
+
+	switch (reg) {
+	case PMBUS_VOUT_MODE:
+		/*
+		 * The chip returns 0x3e, suggesting VID mode with manufacturer
+		 * specific VID codes. Since the output voltage is reported
+		 * with a LSB of 0.5mV, override and report direct mode with
+		 * appropriate coefficients.
+		 */
+		ret = 0x40;
+		break;
+	default:
+		ret = -ENODATA;
+		break;
+	}
+	return ret;
+}
+
+static int ltc3815_write_byte(struct i2c_client *client, int page, u8 reg)
+{
+	int ret;
+
+	switch (reg) {
+	case PMBUS_CLEAR_FAULTS:
+		/*
+		 * LTC3815 does not support the CLEAR_FAULTS command.
+		 * Emulate it by clearing the status register.
+		 */
+		ret = pmbus_read_word_data(client, 0, PMBUS_STATUS_WORD);
+		if (ret > 0) {
+			pmbus_write_word_data(client, 0, PMBUS_STATUS_WORD,
+					      ret);
+			ret = 0;
+		}
+		break;
+	default:
+		ret = -ENODATA;
+		break;
+	}
+	return ret;
+}
+
+static int ltc3815_read_word_data(struct i2c_client *client, int page, int reg)
+{
+	int ret;
+
+	switch (reg) {
+	case PMBUS_VIRT_READ_VIN_MAX:
+		ret = pmbus_read_word_data(client, page, LTC3815_MFR_VIN_PEAK);
+		break;
+	case PMBUS_VIRT_READ_VOUT_MAX:
+		ret = pmbus_read_word_data(client, page, LTC3815_MFR_VOUT_PEAK);
+		break;
+	case PMBUS_VIRT_READ_TEMP_MAX:
+		ret = pmbus_read_word_data(client, page, LTC3815_MFR_TEMP_PEAK);
+		break;
+	case PMBUS_VIRT_READ_IOUT_MAX:
+		ret = pmbus_read_word_data(client, page, LTC3815_MFR_IOUT_PEAK);
+		break;
+	case PMBUS_VIRT_READ_IIN_MAX:
+		ret = pmbus_read_word_data(client, page, LTC3815_MFR_IIN_PEAK);
+		break;
+	case PMBUS_VIRT_RESET_VOUT_HISTORY:
+	case PMBUS_VIRT_RESET_VIN_HISTORY:
+	case PMBUS_VIRT_RESET_TEMP_HISTORY:
+	case PMBUS_VIRT_RESET_IOUT_HISTORY:
+	case PMBUS_VIRT_RESET_IIN_HISTORY:
+		ret = 0;
+		break;
+	default:
+		ret = -ENODATA;
+		break;
+	}
+	return ret;
+}
+
+static int ltc3815_write_word_data(struct i2c_client *client, int page,
+				   int reg, u16 word)
+{
+	int ret;
+
+	switch (reg) {
+	case PMBUS_VIRT_RESET_IIN_HISTORY:
+		ret = pmbus_write_word_data(client, page,
+					    LTC3815_MFR_IIN_PEAK, 0);
+		break;
+	case PMBUS_VIRT_RESET_IOUT_HISTORY:
+		ret = pmbus_write_word_data(client, page,
+					    LTC3815_MFR_IOUT_PEAK, 0);
+		break;
+	case PMBUS_VIRT_RESET_VOUT_HISTORY:
+		ret = pmbus_write_word_data(client, page,
+					    LTC3815_MFR_VOUT_PEAK, 0);
+		break;
+	case PMBUS_VIRT_RESET_VIN_HISTORY:
+		ret = pmbus_write_word_data(client, page,
+					    LTC3815_MFR_VIN_PEAK, 0);
+		break;
+	case PMBUS_VIRT_RESET_TEMP_HISTORY:
+		ret = pmbus_write_word_data(client, page,
+					    LTC3815_MFR_TEMP_PEAK, 0);
+		break;
+	default:
+		ret = -ENODATA;
+		break;
+	}
+	return ret;
+}
+
+static const struct i2c_device_id ltc3815_id[] = {
+	{"ltc3815", 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, ltc3815_id);
+
+static struct pmbus_driver_info ltc3815_info = {
+	.pages = 1,
+	.format[PSC_VOLTAGE_IN] = direct,
+	.format[PSC_VOLTAGE_OUT] = direct,
+	.format[PSC_CURRENT_IN] = direct,
+	.format[PSC_CURRENT_OUT] = direct,
+	.format[PSC_TEMPERATURE] = direct,
+	.m[PSC_VOLTAGE_IN] = 250,
+	.b[PSC_VOLTAGE_IN] = 0,
+	.R[PSC_VOLTAGE_IN] = 0,
+	.m[PSC_VOLTAGE_OUT] = 2,
+	.b[PSC_VOLTAGE_OUT] = 0,
+	.R[PSC_VOLTAGE_OUT] = 3,
+	.m[PSC_CURRENT_IN] = 1,
+	.b[PSC_CURRENT_IN] = 0,
+	.R[PSC_CURRENT_IN] = 2,
+	.m[PSC_CURRENT_OUT] = 1,
+	.b[PSC_CURRENT_OUT] = 0,
+	.R[PSC_CURRENT_OUT] = 2,
+	.m[PSC_TEMPERATURE] = 1,
+	.b[PSC_TEMPERATURE] = 0,
+	.R[PSC_TEMPERATURE] = 0,
+	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_VOUT |
+		PMBUS_HAVE_IOUT | PMBUS_HAVE_TEMP,
+	.read_byte_data = ltc3815_read_byte_data,
+	.read_word_data = ltc3815_read_word_data,
+	.write_byte = ltc3815_write_byte,
+	.write_word_data = ltc3815_write_word_data,
+};
+
+static int ltc3815_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	int chip_id;
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_READ_WORD_DATA))
+		return -ENODEV;
+
+	chip_id = i2c_smbus_read_word_data(client, LTC3815_MFR_SPECIAL_ID);
+	if (chip_id < 0)
+		return chip_id;
+	if ((chip_id & LTC3815_ID_MASK) != LTC3815_ID)
+		return -ENODEV;
+
+	return pmbus_do_probe(client, id, &ltc3815_info);
+}
+
+static struct i2c_driver ltc3815_driver = {
+	.driver = {
+		   .name = "ltc3815",
+		   },
+	.probe = ltc3815_probe,
+	.remove = pmbus_do_remove,
+	.id_table = ltc3815_id,
+};
+
+module_i2c_driver(ltc3815_driver);
+
+MODULE_AUTHOR("Guenter Roeck");
+MODULE_DESCRIPTION("PMBus driver for LTC3815");
+MODULE_LICENSE("GPL");