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From: Zev Weiss <zev@bewilderbeest.net>
To: linux-hwmon@vger.kernel.org, Guenter Roeck <linux@roeck-us.net>,
 Jean Delvare <jdelvare@suse.com>
Subject: [PATCH 3/5] hwmon: (nct6775) Split core and platform driver
Date: Sat, 26 Feb 2022 05:30:45 -0800
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Cc: openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org,
 Zev Weiss <zev@bewilderbeest.net>, Renze Nicolai <renze@rnplus.nl>
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Sender: "openbmc"
 <openbmc-bounces+openbmc=archiver.kernel.org@lists.ozlabs.org>

This splits the nct6775 driver into an interface-independent core and
a separate platform driver that wraps inb/outb port I/O (or asuswmi
methods) around that core.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
---
 MAINTAINERS                                 |    6 +-
 drivers/hwmon/Kconfig                       |   15 +-
 drivers/hwmon/Makefile                      |    3 +-
 drivers/hwmon/{nct6775.c => nct6775-core.c} | 1405 +------------------
 drivers/hwmon/nct6775-platform.c            | 1185 ++++++++++++++++
 drivers/hwmon/nct6775.h                     |  233 +++
 6 files changed, 1467 insertions(+), 1380 deletions(-)
 rename drivers/hwmon/{nct6775.c => nct6775-core.c} (76%)
 create mode 100644 drivers/hwmon/nct6775-platform.c
 create mode 100644 drivers/hwmon/nct6775.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 3dc7c8d21fd6..d318a5580df9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13284,12 +13284,14 @@ M:	Samuel Mendoza-Jonas <sam@mendozajonas.com>
 S:	Maintained
 F:	net/ncsi/
 
-NCT6775 HARDWARE MONITOR DRIVER
+NCT6775 HARDWARE MONITOR DRIVER - CORE & PLATFORM DRIVER
 M:	Guenter Roeck <linux@roeck-us.net>
 L:	linux-hwmon@vger.kernel.org
 S:	Maintained
 F:	Documentation/hwmon/nct6775.rst
-F:	drivers/hwmon/nct6775.c
+F:	drivers/hwmon/nct6775-core.c
+F:	drivers/hwmon/nct6775-platform.c
+F:	drivers/hwmon/nct6775.h
 
 NETDEVSIM
 M:	Jakub Kicinski <kuba@kernel.org>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 463d5b110a85..11822e8a2cda 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1458,9 +1458,20 @@ config SENSORS_NCT6683
 	  will be called nct6683.
 
 config SENSORS_NCT6775
-	tristate "Nuvoton NCT6775F and compatibles"
+	tristate
+	help
+	  This module contains common code shared by the platform and
+	  i2c versions of the nct6775 driver; it is not useful on its
+	  own.
+
+	  If built as a module, the module will be called
+	  nct6775-core.
+
+config SENSORS_NCT6775_PLATFORM
+	tristate "Platform driver for Nuvoton NCT6775F and compatibles"
 	depends on !PPC
 	depends on ACPI_WMI || ACPI_WMI=n
+	select SENSORS_NCT6775
 	select HWMON_VID
 	help
 	  If you say yes here you get support for the hardware monitoring
@@ -1470,7 +1481,7 @@ config SENSORS_NCT6775
 	  NCT6775F and NCT6776F.
 
 	  This driver can also be built as a module. If so, the module
-	  will be called nct6775.
+	  will be called nct6775-platform.
 
 config SENSORS_NCT7802
 	tristate "Nuvoton NCT7802Y"
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 7bba3415ca3d..5f37b2c0f79a 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -154,7 +154,8 @@ obj-$(CONFIG_SENSORS_MLXREG_FAN) += mlxreg-fan.o
 obj-$(CONFIG_SENSORS_MENF21BMC_HWMON) += menf21bmc_hwmon.o
 obj-$(CONFIG_SENSORS_MR75203)	+= mr75203.o
 obj-$(CONFIG_SENSORS_NCT6683)	+= nct6683.o
-obj-$(CONFIG_SENSORS_NCT6775)	+= nct6775.o
+obj-$(CONFIG_SENSORS_NCT6775)	+= nct6775-core.o
+obj-$(CONFIG_SENSORS_NCT6775_PLATFORM) += nct6775-platform.o
 obj-$(CONFIG_SENSORS_NCT7802)	+= nct7802.o
 obj-$(CONFIG_SENSORS_NCT7904)	+= nct7904.o
 obj-$(CONFIG_SENSORS_NPCM7XX)	+= npcm750-pwm-fan.o
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775-core.c
similarity index 76%
rename from drivers/hwmon/nct6775.c
rename to drivers/hwmon/nct6775-core.c
index c5b28a693461..095e9eced752 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775-core.c
@@ -44,25 +44,17 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/jiffies.h>
-#include <linux/platform_device.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
-#include <linux/hwmon-vid.h>
 #include <linux/err.h>
 #include <linux/mutex.h>
-#include <linux/acpi.h>
 #include <linux/bitops.h>
-#include <linux/dmi.h>
-#include <linux/io.h>
 #include <linux/nospec.h>
-#include <linux/wmi.h>
 #include "lm75.h"
+#include "nct6775.h"
 
 #define USE_ALTERNATE
 
-enum kinds { nct6106, nct6116, nct6775, nct6776, nct6779, nct6791, nct6792,
-	     nct6793, nct6795, nct6796, nct6797, nct6798 };
-
 /* used to set data->name = nct6775_device_names[data->sio_kind] */
 static const char * const nct6775_device_names[] = {
 	"nct6106",
@@ -79,242 +71,6 @@ static const char * const nct6775_device_names[] = {
 	"nct6798",
 };
 
-static const char * const nct6775_sio_names[] __initconst = {
-	"NCT6106D",
-	"NCT6116D",
-	"NCT6775F",
-	"NCT6776D/F",
-	"NCT6779D",
-	"NCT6791D",
-	"NCT6792D",
-	"NCT6793D",
-	"NCT6795D",
-	"NCT6796D",
-	"NCT6797D",
-	"NCT6798D",
-};
-
-static unsigned short force_id;
-module_param(force_id, ushort, 0);
-MODULE_PARM_DESC(force_id, "Override the detected device ID");
-
-static unsigned short fan_debounce;
-module_param(fan_debounce, ushort, 0);
-MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal");
-
-#define DRVNAME "nct6775"
-
-/*
- * Super-I/O constants and functions
- */
-
-#define NCT6775_LD_ACPI		0x0a
-#define NCT6775_LD_HWM		0x0b
-#define NCT6775_LD_VID		0x0d
-#define NCT6775_LD_12		0x12
-
-#define SIO_REG_LDSEL		0x07	/* Logical device select */
-#define SIO_REG_DEVID		0x20	/* Device ID (2 bytes) */
-#define SIO_REG_ENABLE		0x30	/* Logical device enable */
-#define SIO_REG_ADDR		0x60	/* Logical device address (2 bytes) */
-
-#define SIO_NCT6106_ID		0xc450
-#define SIO_NCT6116_ID		0xd280
-#define SIO_NCT6775_ID		0xb470
-#define SIO_NCT6776_ID		0xc330
-#define SIO_NCT6779_ID		0xc560
-#define SIO_NCT6791_ID		0xc800
-#define SIO_NCT6792_ID		0xc910
-#define SIO_NCT6793_ID		0xd120
-#define SIO_NCT6795_ID		0xd350
-#define SIO_NCT6796_ID		0xd420
-#define SIO_NCT6797_ID		0xd450
-#define SIO_NCT6798_ID		0xd428
-#define SIO_ID_MASK		0xFFF8
-
-enum pwm_enable { off, manual, thermal_cruise, speed_cruise, sf3, sf4 };
-enum sensor_access { access_direct, access_asuswmi };
-
-struct nct6775_sio_data {
-	int sioreg;
-	int ld;
-	enum kinds kind;
-	enum sensor_access access;
-
-	/* superio_() callbacks  */
-	void (*sio_outb)(struct nct6775_sio_data *sio_data, int reg, int val);
-	int (*sio_inb)(struct nct6775_sio_data *sio_data, int reg);
-	void (*sio_select)(struct nct6775_sio_data *sio_data, int ld);
-	int (*sio_enter)(struct nct6775_sio_data *sio_data);
-	void (*sio_exit)(struct nct6775_sio_data *sio_data);
-};
-
-#define ASUSWMI_MONITORING_GUID		"466747A0-70EC-11DE-8A39-0800200C9A66"
-#define ASUSWMI_METHODID_RSIO		0x5253494F
-#define ASUSWMI_METHODID_WSIO		0x5753494F
-#define ASUSWMI_METHODID_RHWM		0x5248574D
-#define ASUSWMI_METHODID_WHWM		0x5748574D
-#define ASUSWMI_UNSUPPORTED_METHOD	0xFFFFFFFE
-
-static int nct6775_asuswmi_evaluate_method(u32 method_id, u8 bank, u8 reg, u8 val, u32 *retval)
-{
-#if IS_ENABLED(CONFIG_ACPI_WMI)
-	u32 args = bank | (reg << 8) | (val << 16);
-	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
-	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
-	acpi_status status;
-	union acpi_object *obj;
-	u32 tmp = ASUSWMI_UNSUPPORTED_METHOD;
-
-	status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0,
-				     method_id, &input, &output);
-
-	if (ACPI_FAILURE(status))
-		return -EIO;
-
-	obj = output.pointer;
-	if (obj && obj->type == ACPI_TYPE_INTEGER)
-		tmp = obj->integer.value;
-
-	if (retval)
-		*retval = tmp;
-
-	kfree(obj);
-
-	if (tmp == ASUSWMI_UNSUPPORTED_METHOD)
-		return -ENODEV;
-	return 0;
-#else
-	return -EOPNOTSUPP;
-#endif
-}
-
-static inline int nct6775_asuswmi_write(u8 bank, u8 reg, u8 val)
-{
-	return nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_WHWM, bank,
-					      reg, val, NULL);
-}
-
-static inline int nct6775_asuswmi_read(u8 bank, u8 reg, u8 *val)
-{
-	u32 ret, tmp = 0;
-
-	ret = nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_RHWM, bank,
-					      reg, 0, &tmp);
-	*val = tmp;
-	return ret;
-}
-
-static int superio_wmi_inb(struct nct6775_sio_data *sio_data, int reg)
-{
-	int tmp = 0;
-
-	nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_RSIO, sio_data->ld,
-					reg, 0, &tmp);
-	return tmp;
-}
-
-static void superio_wmi_outb(struct nct6775_sio_data *sio_data, int reg, int val)
-{
-	nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_WSIO, sio_data->ld,
-					reg, val, NULL);
-}
-
-static void superio_wmi_select(struct nct6775_sio_data *sio_data, int ld)
-{
-	sio_data->ld = ld;
-}
-
-static int superio_wmi_enter(struct nct6775_sio_data *sio_data)
-{
-	return 0;
-}
-
-static void superio_wmi_exit(struct nct6775_sio_data *sio_data)
-{
-}
-
-static void superio_outb(struct nct6775_sio_data *sio_data, int reg, int val)
-{
-	int ioreg = sio_data->sioreg;
-
-	outb(reg, ioreg);
-	outb(val, ioreg + 1);
-}
-
-static int superio_inb(struct nct6775_sio_data *sio_data, int reg)
-{
-	int ioreg = sio_data->sioreg;
-
-	outb(reg, ioreg);
-	return inb(ioreg + 1);
-}
-
-static void superio_select(struct nct6775_sio_data *sio_data, int ld)
-{
-	int ioreg = sio_data->sioreg;
-
-	outb(SIO_REG_LDSEL, ioreg);
-	outb(ld, ioreg + 1);
-}
-
-static int superio_enter(struct nct6775_sio_data *sio_data)
-{
-	int ioreg = sio_data->sioreg;
-
-	/*
-	 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
-	 */
-	if (!request_muxed_region(ioreg, 2, DRVNAME))
-		return -EBUSY;
-
-	outb(0x87, ioreg);
-	outb(0x87, ioreg);
-
-	return 0;
-}
-
-static void superio_exit(struct nct6775_sio_data *sio_data)
-{
-	int ioreg = sio_data->sioreg;
-
-	outb(0xaa, ioreg);
-	outb(0x02, ioreg);
-	outb(0x02, ioreg + 1);
-	release_region(ioreg, 2);
-}
-
-/*
- * ISA constants
- */
-
-#define IOREGION_ALIGNMENT	(~7)
-#define IOREGION_OFFSET		5
-#define IOREGION_LENGTH		2
-#define ADDR_REG_OFFSET		0
-#define DATA_REG_OFFSET		1
-
-#define NCT6775_REG_BANK	0x4E
-#define NCT6775_REG_CONFIG	0x40
-#define NCT6775_PORT_CHIPID	0x58
-
-/*
- * Not currently used:
- * REG_MAN_ID has the value 0x5ca3 for all supported chips.
- * REG_CHIP_ID == 0x88/0xa1/0xc1 depending on chip model.
- * REG_MAN_ID is at port 0x4f
- * REG_CHIP_ID is at port 0x58
- */
-
-#define NUM_TEMP	10	/* Max number of temp attribute sets w/ limits*/
-#define NUM_TEMP_FIXED	6	/* Max number of fixed temp attribute sets */
-#define NUM_TSI_TEMP	8	/* Max number of TSI temp register pairs */
-
-#define NUM_REG_ALARM	7	/* Max number of alarm registers */
-#define NUM_REG_BEEP	5	/* Max number of beep registers */
-
-#define NUM_FAN		7
-
 /* Common and NCT6775 specific data */
 
 /* Voltage min/max registers for nr=7..14 are in bank 5 */
@@ -333,11 +89,6 @@ static const u16 NCT6775_REG_IN[] = {
 #define NCT6775_REG_DIODE		0x5E
 #define NCT6775_DIODE_MASK		0x02
 
-#define NCT6775_REG_FANDIV1		0x506
-#define NCT6775_REG_FANDIV2		0x507
-
-#define NCT6775_REG_CR_FAN_DEBOUNCE	0xf0
-
 static const u16 NCT6775_REG_ALARM[NUM_REG_ALARM] = { 0x459, 0x45A, 0x45B };
 
 /* 0..15 voltages, 16..23 fans, 24..29 temperatures, 30..31 intrusion */
@@ -351,10 +102,6 @@ static const s8 NCT6775_ALARM_BITS[] = {
 	4, 5, 13, -1, -1, -1,		/* temp1..temp6 */
 	12, -1 };			/* intrusion0, intrusion1 */
 
-#define FAN_ALARM_BASE		16
-#define TEMP_ALARM_BASE		24
-#define INTRUSION_ALARM_BASE	30
-
 static const u16 NCT6775_REG_BEEP[NUM_REG_BEEP] = { 0x56, 0x57, 0x453, 0x4e };
 
 /*
@@ -370,11 +117,6 @@ static const s8 NCT6775_BEEP_BITS[] = {
 	4, 5, 13, -1, -1, -1,		/* temp1..temp6 */
 	12, -1 };			/* intrusion0, intrusion1 */
 
-#define BEEP_ENABLE_BASE		15
-
-static const u8 NCT6775_REG_CR_CASEOPEN_CLR[] = { 0xe6, 0xee };
-static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = { 0x20, 0x01 };
-
 /* DC or PWM output fan configuration */
 static const u8 NCT6775_REG_PWM_MODE[] = { 0x04, 0x04, 0x12 };
 static const u8 NCT6775_PWM_MODE_MASK[] = { 0x01, 0x02, 0x01 };
@@ -690,8 +432,6 @@ static const u16 NCT6779_REG_TEMP_CRIT[32] = {
 
 /* NCT6791 specific data */
 
-#define NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE	0x28
-
 static const u16 NCT6791_REG_WEIGHT_TEMP_SEL[NUM_FAN] = { 0, 0x239 };
 static const u16 NCT6791_REG_WEIGHT_TEMP_STEP[NUM_FAN] = { 0, 0x23a };
 static const u16 NCT6791_REG_WEIGHT_TEMP_STEP_TOL[NUM_FAN] = { 0, 0x23b };
@@ -1191,168 +931,6 @@ static inline unsigned int tsi_temp_from_reg(unsigned int reg)
  * Data structures and manipulation thereof
  */
 
-struct nct6775_data {
-	int addr;	/* IO base of hw monitor block */
-	struct nct6775_sio_data *sio_data;
-	enum kinds kind;
-	const char *name;
-
-	const struct attribute_group *groups[7];
-	u8 num_groups;
-
-	u16 reg_temp[5][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst,
-				    * 3=temp_crit, 4=temp_lcrit
-				    */
-	u8 temp_src[NUM_TEMP];
-	u16 reg_temp_config[NUM_TEMP];
-	const char * const *temp_label;
-	u32 temp_mask;
-	u32 virt_temp_mask;
-
-	u16 REG_CONFIG;
-	u16 REG_VBAT;
-	u16 REG_DIODE;
-	u8 DIODE_MASK;
-
-	const s8 *ALARM_BITS;
-	const s8 *BEEP_BITS;
-
-	const u16 *REG_VIN;
-	const u16 *REG_IN_MINMAX[2];
-
-	const u16 *REG_TARGET;
-	const u16 *REG_FAN;
-	const u16 *REG_FAN_MODE;
-	const u16 *REG_FAN_MIN;
-	const u16 *REG_FAN_PULSES;
-	const u16 *FAN_PULSE_SHIFT;
-	const u16 *REG_FAN_TIME[3];
-
-	const u16 *REG_TOLERANCE_H;
-
-	const u8 *REG_PWM_MODE;
-	const u8 *PWM_MODE_MASK;
-
-	const u16 *REG_PWM[7];	/* [0]=pwm, [1]=pwm_start, [2]=pwm_floor,
-				 * [3]=pwm_max, [4]=pwm_step,
-				 * [5]=weight_duty_step, [6]=weight_duty_base
-				 */
-	const u16 *REG_PWM_READ;
-
-	const u16 *REG_CRITICAL_PWM_ENABLE;
-	u8 CRITICAL_PWM_ENABLE_MASK;
-	const u16 *REG_CRITICAL_PWM;
-
-	const u16 *REG_AUTO_TEMP;
-	const u16 *REG_AUTO_PWM;
-
-	const u16 *REG_CRITICAL_TEMP;
-	const u16 *REG_CRITICAL_TEMP_TOLERANCE;
-
-	const u16 *REG_TEMP_SOURCE;	/* temp register sources */
-	const u16 *REG_TEMP_SEL;
-	const u16 *REG_WEIGHT_TEMP_SEL;
-	const u16 *REG_WEIGHT_TEMP[3];	/* 0=base, 1=tolerance, 2=step */
-
-	const u16 *REG_TEMP_OFFSET;
-
-	const u16 *REG_ALARM;
-	const u16 *REG_BEEP;
-
-	const u16 *REG_TSI_TEMP;
-
-	unsigned int (*fan_from_reg)(u16 reg, unsigned int divreg);
-	unsigned int (*fan_from_reg_min)(u16 reg, unsigned int divreg);
-
-	struct mutex update_lock;
-	bool valid;		/* true if following fields are valid */
-	unsigned long last_updated;	/* In jiffies */
-
-	/* Register values */
-	u8 bank;		/* current register bank */
-	u8 in_num;		/* number of in inputs we have */
-	u8 in[15][3];		/* [0]=in, [1]=in_max, [2]=in_min */
-	unsigned int rpm[NUM_FAN];
-	u16 fan_min[NUM_FAN];
-	u8 fan_pulses[NUM_FAN];
-	u8 fan_div[NUM_FAN];
-	u8 has_pwm;
-	u8 has_fan;		/* some fan inputs can be disabled */
-	u8 has_fan_min;		/* some fans don't have min register */
-	bool has_fan_div;
-
-	u8 num_temp_alarms;	/* 2, 3, or 6 */
-	u8 num_temp_beeps;	/* 2, 3, or 6 */
-	u8 temp_fixed_num;	/* 3 or 6 */
-	u8 temp_type[NUM_TEMP_FIXED];
-	s8 temp_offset[NUM_TEMP_FIXED];
-	s16 temp[5][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst,
-				* 3=temp_crit, 4=temp_lcrit */
-	s16 tsi_temp[NUM_TSI_TEMP];
-	u64 alarms;
-	u64 beeps;
-
-	u8 pwm_num;	/* number of pwm */
-	u8 pwm_mode[NUM_FAN];	/* 0->DC variable voltage,
-				 * 1->PWM variable duty cycle
-				 */
-	enum pwm_enable pwm_enable[NUM_FAN];
-			/* 0->off
-			 * 1->manual
-			 * 2->thermal cruise mode (also called SmartFan I)
-			 * 3->fan speed cruise mode
-			 * 4->SmartFan III
-			 * 5->enhanced variable thermal cruise (SmartFan IV)
-			 */
-	u8 pwm[7][NUM_FAN];	/* [0]=pwm, [1]=pwm_start, [2]=pwm_floor,
-				 * [3]=pwm_max, [4]=pwm_step,
-				 * [5]=weight_duty_step, [6]=weight_duty_base
-				 */
-
-	u8 target_temp[NUM_FAN];
-	u8 target_temp_mask;
-	u32 target_speed[NUM_FAN];
-	u32 target_speed_tolerance[NUM_FAN];
-	u8 speed_tolerance_limit;
-
-	u8 temp_tolerance[2][NUM_FAN];
-	u8 tolerance_mask;
-
-	u8 fan_time[3][NUM_FAN]; /* 0 = stop_time, 1 = step_up, 2 = step_down */
-
-	/* Automatic fan speed control registers */
-	int auto_pwm_num;
-	u8 auto_pwm[NUM_FAN][7];
-	u8 auto_temp[NUM_FAN][7];
-	u8 pwm_temp_sel[NUM_FAN];
-	u8 pwm_weight_temp_sel[NUM_FAN];
-	u8 weight_temp[3][NUM_FAN];	/* 0->temp_step, 1->temp_step_tol,
-					 * 2->temp_base
-					 */
-
-	u8 vid;
-	u8 vrm;
-
-	bool have_vid;
-
-	u16 have_temp;
-	u16 have_temp_fixed;
-	u16 have_tsi_temp;
-	u16 have_in;
-
-	/* Remember extra register values over suspend/resume */
-	u8 vbat;
-	u8 fandiv1;
-	u8 fandiv2;
-	u8 sio_reg_enable;
-
-	/* nct6775_*() callbacks  */
-	u16 (*read_value)(struct nct6775_data *data, u16 reg);
-	int (*write_value)(struct nct6775_data *data, u16 reg, u16 value);
-
-	bool read_only;
-};
-
 struct sensor_device_template {
 	struct device_attribute dev_attr;
 	union {
@@ -1408,21 +986,6 @@ struct sensor_template_group {
 	int base;
 };
 
-static inline umode_t nct6775_attr_mode(struct nct6775_data *data, struct attribute *attr)
-{
-	return data->read_only ? (attr->mode & ~0222) : attr->mode;
-}
-
-static int nct6775_add_attr_group(struct nct6775_data *data, const struct attribute_group *group)
-{
-	/* Need to leave a NULL terminator at the end of data->groups */
-	if (WARN_ON(data->num_groups == ARRAY_SIZE(data->groups) - 1))
-		return -ENOSPC;
-
-	data->groups[data->num_groups++] = group;
-	return 0;
-}
-
 static int nct6775_add_template_attr_group(struct device *dev, struct nct6775_data *data,
 					   const struct sensor_template_group *tg, int repeat)
 {
@@ -1497,7 +1060,7 @@ static int nct6775_add_template_attr_group(struct device *dev, struct nct6775_da
 	return nct6775_add_attr_group(data, group);
 }
 
-static bool is_word_sized(struct nct6775_data *data, u16 reg)
+bool nct6775_reg_is_word_sized(struct nct6775_data *data, u16 reg)
 {
 	switch (data->kind) {
 	case nct6106:
@@ -1554,101 +1117,7 @@ static bool is_word_sized(struct nct6775_data *data, u16 reg)
 	}
 	return false;
 }
-
-static inline void nct6775_wmi_set_bank(struct nct6775_data *data, u16 reg)
-{
-	u8 bank = reg >> 8;
-
-	data->bank = bank;
-}
-
-static u16 nct6775_wmi_read_value(struct nct6775_data *data, u16 reg)
-{
-	int res, err, word_sized = is_word_sized(data, reg);
-	u8 tmp = 0;
-
-	nct6775_wmi_set_bank(data, reg);
-
-	err = nct6775_asuswmi_read(data->bank, reg & 0xff, &tmp);
-	if (err)
-		return 0;
-
-	res = tmp;
-	if (word_sized) {
-		err = nct6775_asuswmi_read(data->bank, (reg & 0xff) + 1, &tmp);
-		if (err)
-			return 0;
-
-		res = (res << 8) + tmp;
-	}
-	return res;
-}
-
-static int nct6775_wmi_write_value(struct nct6775_data *data, u16 reg, u16 value)
-{
-	int res, word_sized = is_word_sized(data, reg);
-
-	nct6775_wmi_set_bank(data, reg);
-
-	if (word_sized) {
-		res = nct6775_asuswmi_write(data->bank, reg & 0xff, value >> 8);
-		if (res)
-			return res;
-
-		res = nct6775_asuswmi_write(data->bank, (reg & 0xff) + 1, value);
-	} else {
-		res = nct6775_asuswmi_write(data->bank, reg & 0xff, value);
-	}
-
-	return res;
-}
-
-/*
- * On older chips, only registers 0x50-0x5f are banked.
- * On more recent chips, all registers are banked.
- * Assume that is the case and set the bank number for each access.
- * Cache the bank number so it only needs to be set if it changes.
- */
-static inline void nct6775_set_bank(struct nct6775_data *data, u16 reg)
-{
-	u8 bank = reg >> 8;
-
-	if (data->bank != bank) {
-		outb_p(NCT6775_REG_BANK, data->addr + ADDR_REG_OFFSET);
-		outb_p(bank, data->addr + DATA_REG_OFFSET);
-		data->bank = bank;
-	}
-}
-
-static u16 nct6775_read_value(struct nct6775_data *data, u16 reg)
-{
-	int res, word_sized = is_word_sized(data, reg);
-
-	nct6775_set_bank(data, reg);
-	outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET);
-	res = inb_p(data->addr + DATA_REG_OFFSET);
-	if (word_sized) {
-		outb_p((reg & 0xff) + 1,
-		       data->addr + ADDR_REG_OFFSET);
-		res = (res << 8) + inb_p(data->addr + DATA_REG_OFFSET);
-	}
-	return res;
-}
-
-static int nct6775_write_value(struct nct6775_data *data, u16 reg, u16 value)
-{
-	int word_sized = is_word_sized(data, reg);
-
-	nct6775_set_bank(data, reg);
-	outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET);
-	if (word_sized) {
-		outb_p(value >> 8, data->addr + DATA_REG_OFFSET);
-		outb_p((reg & 0xff) + 1,
-		       data->addr + ADDR_REG_OFFSET);
-	}
-	outb_p(value & 0xff, data->addr + DATA_REG_OFFSET);
-	return 0;
-}
+EXPORT_SYMBOL_GPL(nct6775_reg_is_word_sized);
 
 /* We left-align 8-bit temperature values to make the code simpler */
 static u16 nct6775_read_temp(struct nct6775_data *data, u16 reg)
@@ -1656,18 +1125,19 @@ static u16 nct6775_read_temp(struct nct6775_data *data, u16 reg)
 	u16 res;
 
 	res = data->read_value(data, reg);
-	if (!is_word_sized(data, reg))
+	if (!nct6775_reg_is_word_sized(data, reg))
 		res <<= 8;
 
 	return res;
 }
 
-static int nct6775_write_temp(struct nct6775_data *data, u16 reg, u16 value)
+int nct6775_write_temp(struct nct6775_data *data, u16 reg, u16 value)
 {
-	if (!is_word_sized(data, reg))
+	if (!nct6775_reg_is_word_sized(data, reg))
 		value >>= 8;
 	return data->write_value(data, reg, value);
 }
+EXPORT_SYMBOL_GPL(nct6775_write_temp);
 
 /* This function assumes that the caller holds data->update_lock */
 static void nct6775_write_fan_div(struct nct6775_data *data, int nr)
@@ -1960,7 +1430,7 @@ static void nct6775_update_pwm_limits(struct device *dev)
 	}
 }
 
-static struct nct6775_data *nct6775_update_device(struct device *dev)
+struct nct6775_data *nct6775_update_device(struct device *dev)
 {
 	struct nct6775_data *data = dev_get_drvdata(dev);
 	int i, j;
@@ -2062,6 +1532,7 @@ static struct nct6775_data *nct6775_update_device(struct device *dev)
 	mutex_unlock(&data->update_lock);
 	return data;
 }
+EXPORT_SYMBOL_GPL(nct6775_update_device);
 
 /*
  * Sysfs callback functions
@@ -2099,8 +1570,8 @@ store_in_reg(struct device *dev, struct device_attribute *attr, const char *buf,
 	return count;
 }
 
-static ssize_t
-show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
+ssize_t
+nct6775_show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct nct6775_data *data = nct6775_update_device(dev);
 	struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
@@ -2109,6 +1580,7 @@ show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
 	return sprintf(buf, "%u\n",
 		       (unsigned int)((data->alarms >> nr) & 0x01));
 }
+EXPORT_SYMBOL_GPL(nct6775_show_alarm);
 
 static int find_temp_source(struct nct6775_data *data, int index, int count)
 {
@@ -2147,8 +1619,8 @@ show_temp_alarm(struct device *dev, struct device_attribute *attr, char *buf)
 	return sprintf(buf, "%u\n", alarm);
 }
 
-static ssize_t
-show_beep(struct device *dev, struct device_attribute *attr, char *buf)
+ssize_t
+nct6775_show_beep(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
 	struct nct6775_data *data = nct6775_update_device(dev);
@@ -2157,10 +1629,10 @@ show_beep(struct device *dev, struct device_attribute *attr, char *buf)
 	return sprintf(buf, "%u\n",
 		       (unsigned int)((data->beeps >> nr) & 0x01));
 }
+EXPORT_SYMBOL_GPL(nct6775_show_beep);
 
-static ssize_t
-store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
-	   size_t count)
+ssize_t
+nct6775_store_beep(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 nct6775_data *data = dev_get_drvdata(dev);
@@ -2185,6 +1657,7 @@ store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
 	mutex_unlock(&data->update_lock);
 	return count;
 }
+EXPORT_SYMBOL_GPL(nct6775_store_beep);
 
 static ssize_t
 show_temp_beep(struct device *dev, struct device_attribute *attr, char *buf)
@@ -2257,9 +1730,8 @@ static umode_t nct6775_in_is_visible(struct kobject *kobj,
 }
 
 SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
-SENSOR_TEMPLATE(in_alarm, "in%d_alarm", S_IRUGO, show_alarm, NULL, 0);
-SENSOR_TEMPLATE(in_beep, "in%d_beep", S_IWUSR | S_IRUGO, show_beep, store_beep,
-		0);
+SENSOR_TEMPLATE(in_alarm, "in%d_alarm", S_IRUGO, nct6775_show_alarm, NULL, 0);
+SENSOR_TEMPLATE(in_beep, "in%d_beep", S_IWUSR | S_IRUGO, nct6775_show_beep, nct6775_store_beep, 0);
 SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IWUSR | S_IRUGO, show_in_reg,
 		  store_in_reg, 0, 1);
 SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IWUSR | S_IRUGO, show_in_reg,
@@ -2475,10 +1947,10 @@ static umode_t nct6775_fan_is_visible(struct kobject *kobj,
 }
 
 SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
-SENSOR_TEMPLATE(fan_alarm, "fan%d_alarm", S_IRUGO, show_alarm, NULL,
+SENSOR_TEMPLATE(fan_alarm, "fan%d_alarm", S_IRUGO, nct6775_show_alarm, NULL,
 		FAN_ALARM_BASE);
-SENSOR_TEMPLATE(fan_beep, "fan%d_beep", S_IWUSR | S_IRUGO, show_beep,
-		store_beep, FAN_ALARM_BASE);
+SENSOR_TEMPLATE(fan_beep, "fan%d_beep", S_IWUSR | S_IRUGO, nct6775_show_beep,
+		nct6775_store_beep, FAN_ALARM_BASE);
 SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IWUSR | S_IRUGO, show_fan_pulses,
 		store_fan_pulses, 0);
 SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IWUSR | S_IRUGO, show_fan_min,
@@ -3628,113 +3100,6 @@ static const struct sensor_template_group nct6775_pwm_template_group = {
 	.base = 1,
 };
 
-static ssize_t
-cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct nct6775_data *data = dev_get_drvdata(dev);
-
-	return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
-}
-
-static DEVICE_ATTR_RO(cpu0_vid);
-
-/* Case open detection */
-
-static ssize_t
-clear_caseopen(struct device *dev, struct device_attribute *attr,
-	       const char *buf, size_t count)
-{
-	struct nct6775_data *data = dev_get_drvdata(dev);
-	struct nct6775_sio_data *sio_data = data->sio_data;
-	int nr = to_sensor_dev_attr(attr)->index - INTRUSION_ALARM_BASE;
-	unsigned long val;
-	u8 reg;
-	int ret;
-
-	if (kstrtoul(buf, 10, &val) || val != 0)
-		return -EINVAL;
-
-	mutex_lock(&data->update_lock);
-
-	/*
-	 * Use CR registers to clear caseopen status.
-	 * The CR registers are the same for all chips, and not all chips
-	 * support clearing the caseopen status through "regular" registers.
-	 */
-	ret = sio_data->sio_enter(sio_data);
-	if (ret) {
-		count = ret;
-		goto error;
-	}
-
-	sio_data->sio_select(sio_data, NCT6775_LD_ACPI);
-	reg = sio_data->sio_inb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr]);
-	reg |= NCT6775_CR_CASEOPEN_CLR_MASK[nr];
-	sio_data->sio_outb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg);
-	reg &= ~NCT6775_CR_CASEOPEN_CLR_MASK[nr];
-	sio_data->sio_outb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg);
-	sio_data->sio_exit(sio_data);
-
-	data->valid = false;	/* Force cache refresh */
-error:
-	mutex_unlock(&data->update_lock);
-	return count;
-}
-
-static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm,
-			  clear_caseopen, INTRUSION_ALARM_BASE);
-static SENSOR_DEVICE_ATTR(intrusion1_alarm, S_IWUSR | S_IRUGO, show_alarm,
-			  clear_caseopen, INTRUSION_ALARM_BASE + 1);
-static SENSOR_DEVICE_ATTR(intrusion0_beep, S_IWUSR | S_IRUGO, show_beep,
-			  store_beep, INTRUSION_ALARM_BASE);
-static SENSOR_DEVICE_ATTR(intrusion1_beep, S_IWUSR | S_IRUGO, show_beep,
-			  store_beep, INTRUSION_ALARM_BASE + 1);
-static SENSOR_DEVICE_ATTR(beep_enable, S_IWUSR | S_IRUGO, show_beep,
-			  store_beep, BEEP_ENABLE_BASE);
-
-static umode_t nct6775_other_is_visible(struct kobject *kobj,
-					struct attribute *attr, int index)
-{
-	struct device *dev = kobj_to_dev(kobj);
-	struct nct6775_data *data = dev_get_drvdata(dev);
-
-	if (index == 0 && !data->have_vid)
-		return 0;
-
-	if (index == 1 || index == 2) {
-		if (data->ALARM_BITS[INTRUSION_ALARM_BASE + index - 1] < 0)
-			return 0;
-	}
-
-	if (index == 3 || index == 4) {
-		if (data->BEEP_BITS[INTRUSION_ALARM_BASE + index - 3] < 0)
-			return 0;
-	}
-
-	return nct6775_attr_mode(data, attr);
-}
-
-/*
- * nct6775_other_is_visible uses the index into the following array
- * to determine if attributes should be created or not.
- * Any change in order or content must be matched.
- */
-static struct attribute *nct6775_attributes_other[] = {
-	&dev_attr_cpu0_vid.attr,				/* 0 */
-	&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,	/* 1 */
-	&sensor_dev_attr_intrusion1_alarm.dev_attr.attr,	/* 2 */
-	&sensor_dev_attr_intrusion0_beep.dev_attr.attr,		/* 3 */
-	&sensor_dev_attr_intrusion1_beep.dev_attr.attr,		/* 4 */
-	&sensor_dev_attr_beep_enable.dev_attr.attr,		/* 5 */
-
-	NULL
-};
-
-static const struct attribute_group nct6775_group_other = {
-	.attrs = nct6775_attributes_other,
-	.is_visible = nct6775_other_is_visible,
-};
-
 static inline void nct6775_init_device(struct nct6775_data *data)
 {
 	int i;
@@ -3777,227 +3142,6 @@ static inline void nct6775_init_device(struct nct6775_data *data)
 	}
 }
 
-static void
-nct6775_check_fan_inputs(struct nct6775_data *data, struct nct6775_sio_data *sio_data)
-{
-	bool fan3pin = false, fan4pin = false, fan4min = false;
-	bool fan5pin = false, fan6pin = false, fan7pin = false;
-	bool pwm3pin = false, pwm4pin = false, pwm5pin = false;
-	bool pwm6pin = false, pwm7pin = false;
-
-	/* Store SIO_REG_ENABLE for use during resume */
-	sio_data->sio_select(sio_data, NCT6775_LD_HWM);
-	data->sio_reg_enable = sio_data->sio_inb(sio_data, SIO_REG_ENABLE);
-
-	/* fan4 and fan5 share some pins with the GPIO and serial flash */
-	if (data->kind == nct6775) {
-		int cr2c = sio_data->sio_inb(sio_data, 0x2c);
-
-		fan3pin = cr2c & BIT(6);
-		pwm3pin = cr2c & BIT(7);
-
-		/* On NCT6775, fan4 shares pins with the fdc interface */
-		fan4pin = !(sio_data->sio_inb(sio_data, 0x2A) & 0x80);
-	} else if (data->kind == nct6776) {
-		bool gpok = sio_data->sio_inb(sio_data, 0x27) & 0x80;
-		const char *board_vendor, *board_name;
-
-		board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
-		board_name = dmi_get_system_info(DMI_BOARD_NAME);
-
-		if (board_name && board_vendor &&
-		    !strcmp(board_vendor, "ASRock")) {
-			/*
-			 * Auxiliary fan monitoring is not enabled on ASRock
-			 * Z77 Pro4-M if booted in UEFI Ultra-FastBoot mode.
-			 * Observed with BIOS version 2.00.
-			 */
-			if (!strcmp(board_name, "Z77 Pro4-M")) {
-				if ((data->sio_reg_enable & 0xe0) != 0xe0) {
-					data->sio_reg_enable |= 0xe0;
-					sio_data->sio_outb(sio_data, SIO_REG_ENABLE,
-						     data->sio_reg_enable);
-				}
-			}
-		}
-
-		if (data->sio_reg_enable & 0x80)
-			fan3pin = gpok;
-		else
-			fan3pin = !(sio_data->sio_inb(sio_data, 0x24) & 0x40);
-
-		if (data->sio_reg_enable & 0x40)
-			fan4pin = gpok;
-		else
-			fan4pin = sio_data->sio_inb(sio_data, 0x1C) & 0x01;
-
-		if (data->sio_reg_enable & 0x20)
-			fan5pin = gpok;
-		else
-			fan5pin = sio_data->sio_inb(sio_data, 0x1C) & 0x02;
-
-		fan4min = fan4pin;
-		pwm3pin = fan3pin;
-	} else if (data->kind == nct6106) {
-		int cr24 = sio_data->sio_inb(sio_data, 0x24);
-
-		fan3pin = !(cr24 & 0x80);
-		pwm3pin = cr24 & 0x08;
-	} else if (data->kind == nct6116) {
-		int cr1a = sio_data->sio_inb(sio_data, 0x1a);
-		int cr1b = sio_data->sio_inb(sio_data, 0x1b);
-		int cr24 = sio_data->sio_inb(sio_data, 0x24);
-		int cr2a = sio_data->sio_inb(sio_data, 0x2a);
-		int cr2b = sio_data->sio_inb(sio_data, 0x2b);
-		int cr2f = sio_data->sio_inb(sio_data, 0x2f);
-
-		fan3pin = !(cr2b & 0x10);
-		fan4pin = (cr2b & 0x80) ||			// pin 1(2)
-			(!(cr2f & 0x10) && (cr1a & 0x04));	// pin 65(66)
-		fan5pin = (cr2b & 0x80) ||			// pin 126(127)
-			(!(cr1b & 0x03) && (cr2a & 0x02));	// pin 94(96)
-
-		pwm3pin = fan3pin && (cr24 & 0x08);
-		pwm4pin = fan4pin;
-		pwm5pin = fan5pin;
-	} else {
-		/*
-		 * NCT6779D, NCT6791D, NCT6792D, NCT6793D, NCT6795D, NCT6796D,
-		 * NCT6797D, NCT6798D
-		 */
-		int cr1a = sio_data->sio_inb(sio_data, 0x1a);
-		int cr1b = sio_data->sio_inb(sio_data, 0x1b);
-		int cr1c = sio_data->sio_inb(sio_data, 0x1c);
-		int cr1d = sio_data->sio_inb(sio_data, 0x1d);
-		int cr2a = sio_data->sio_inb(sio_data, 0x2a);
-		int cr2b = sio_data->sio_inb(sio_data, 0x2b);
-		int cr2d = sio_data->sio_inb(sio_data, 0x2d);
-		int cr2f = sio_data->sio_inb(sio_data, 0x2f);
-		bool dsw_en = cr2f & BIT(3);
-		bool ddr4_en = cr2f & BIT(4);
-		int cre0;
-		int creb;
-		int cred;
-
-		sio_data->sio_select(sio_data, NCT6775_LD_12);
-		cre0 = sio_data->sio_inb(sio_data, 0xe0);
-		creb = sio_data->sio_inb(sio_data, 0xeb);
-		cred = sio_data->sio_inb(sio_data, 0xed);
-
-		fan3pin = !(cr1c & BIT(5));
-		fan4pin = !(cr1c & BIT(6));
-		fan5pin = !(cr1c & BIT(7));
-
-		pwm3pin = !(cr1c & BIT(0));
-		pwm4pin = !(cr1c & BIT(1));
-		pwm5pin = !(cr1c & BIT(2));
-
-		switch (data->kind) {
-		case nct6791:
-			fan6pin = cr2d & BIT(1);
-			pwm6pin = cr2d & BIT(0);
-			break;
-		case nct6792:
-			fan6pin = !dsw_en && (cr2d & BIT(1));
-			pwm6pin = !dsw_en && (cr2d & BIT(0));
-			break;
-		case nct6793:
-			fan5pin |= cr1b & BIT(5);
-			fan5pin |= creb & BIT(5);
-
-			fan6pin = !dsw_en && (cr2d & BIT(1));
-			fan6pin |= creb & BIT(3);
-
-			pwm5pin |= cr2d & BIT(7);
-			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
-
-			pwm6pin = !dsw_en && (cr2d & BIT(0));
-			pwm6pin |= creb & BIT(2);
-			break;
-		case nct6795:
-			fan5pin |= cr1b & BIT(5);
-			fan5pin |= creb & BIT(5);
-
-			fan6pin = (cr2a & BIT(4)) &&
-					(!dsw_en || (cred & BIT(4)));
-			fan6pin |= creb & BIT(3);
-
-			pwm5pin |= cr2d & BIT(7);
-			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
-
-			pwm6pin = (cr2a & BIT(3)) && (cred & BIT(2));
-			pwm6pin |= creb & BIT(2);
-			break;
-		case nct6796:
-			fan5pin |= cr1b & BIT(5);
-			fan5pin |= (cre0 & BIT(3)) && !(cr1b & BIT(0));
-			fan5pin |= creb & BIT(5);
-
-			fan6pin = (cr2a & BIT(4)) &&
-					(!dsw_en || (cred & BIT(4)));
-			fan6pin |= creb & BIT(3);
-
-			fan7pin = !(cr2b & BIT(2));
-
-			pwm5pin |= cr2d & BIT(7);
-			pwm5pin |= (cre0 & BIT(4)) && !(cr1b & BIT(0));
-			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
-
-			pwm6pin = (cr2a & BIT(3)) && (cred & BIT(2));
-			pwm6pin |= creb & BIT(2);
-
-			pwm7pin = !(cr1d & (BIT(2) | BIT(3)));
-			break;
-		case nct6797:
-			fan5pin |= !ddr4_en && (cr1b & BIT(5));
-			fan5pin |= creb & BIT(5);
-
-			fan6pin = cr2a & BIT(4);
-			fan6pin |= creb & BIT(3);
-
-			fan7pin = cr1a & BIT(1);
-
-			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
-			pwm5pin |= !ddr4_en && (cr2d & BIT(7));
-
-			pwm6pin = creb & BIT(2);
-			pwm6pin |= cred & BIT(2);
-
-			pwm7pin = cr1d & BIT(4);
-			break;
-		case nct6798:
-			fan6pin = !(cr1b & BIT(0)) && (cre0 & BIT(3));
-			fan6pin |= cr2a & BIT(4);
-			fan6pin |= creb & BIT(5);
-
-			fan7pin = cr1b & BIT(5);
-			fan7pin |= !(cr2b & BIT(2));
-			fan7pin |= creb & BIT(3);
-
-			pwm6pin = !(cr1b & BIT(0)) && (cre0 & BIT(4));
-			pwm6pin |= !(cred & BIT(2)) && (cr2a & BIT(3));
-			pwm6pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
-
-			pwm7pin = !(cr1d & (BIT(2) | BIT(3)));
-			pwm7pin |= cr2d & BIT(7);
-			pwm7pin |= creb & BIT(2);
-			break;
-		default:	/* NCT6779D */
-			break;
-		}
-
-		fan4min = fan4pin;
-	}
-
-	/* fan 1 and 2 (0x03) are always present */
-	data->has_fan = 0x03 | (fan3pin << 2) | (fan4pin << 3) |
-		(fan5pin << 4) | (fan6pin << 5) | (fan7pin << 6);
-	data->has_fan_min = 0x03 | (fan3pin << 2) | (fan4min << 3) |
-		(fan5pin << 4) | (fan6pin << 5) | (fan7pin << 6);
-	data->has_pwm = 0x03 | (pwm3pin << 2) | (pwm4pin << 3) |
-		(pwm5pin << 4) | (pwm6pin << 5) | (pwm7pin << 6);
-}
-
 static void add_temp_sensors(struct nct6775_data *data, const u16 *regp,
 			     int *available, int *mask)
 {
@@ -4023,50 +3167,20 @@ static void add_temp_sensors(struct nct6775_data *data, const u16 *regp,
 	}
 }
 
-static int nct6775_probe(struct platform_device *pdev)
+int nct6775_probe(struct device *dev, struct nct6775_data *data)
 {
-	struct device *dev = &pdev->dev;
-	struct nct6775_sio_data *sio_data = dev_get_platdata(dev);
-	struct nct6775_data *data;
-	struct resource *res;
 	int i, s, err = 0;
 	int src, mask, available;
 	const u16 *reg_temp, *reg_temp_over, *reg_temp_hyst, *reg_temp_config;
 	const u16 *reg_temp_mon, *reg_temp_alternate, *reg_temp_crit;
 	const u16 *reg_temp_crit_l = NULL, *reg_temp_crit_h = NULL;
 	int num_reg_temp, num_reg_temp_mon, num_reg_tsi_temp;
-	u8 cr2a;
 	struct device *hwmon_dev;
 	struct sensor_template_group tsi_temp_tg;
 
-	if (sio_data->access == access_direct) {
-		res = platform_get_resource(pdev, IORESOURCE_IO, 0);
-		if (!devm_request_region(&pdev->dev, res->start, IOREGION_LENGTH,
-					 DRVNAME))
-			return -EBUSY;
-	}
-
-	data = devm_kzalloc(&pdev->dev, sizeof(struct nct6775_data),
-			    GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	data->kind = sio_data->kind;
-	data->sio_data = sio_data;
-
-	if (sio_data->access == access_direct) {
-		data->addr = res->start;
-		data->read_value = nct6775_read_value;
-		data->write_value = nct6775_write_value;
-	} else {
-		data->read_value = nct6775_wmi_read_value;
-		data->write_value = nct6775_wmi_write_value;
-	}
-
 	mutex_init(&data->update_lock);
 	data->name = nct6775_device_names[data->kind];
 	data->bank = 0xff;		/* Force initial bank selection */
-	platform_set_drvdata(pdev, data);
 
 	switch (data->kind) {
 	case nct6106:
@@ -4781,79 +3895,12 @@ static int nct6775_probe(struct platform_device *pdev)
 	/* Initialize the chip */
 	nct6775_init_device(data);
 
-	err = sio_data->sio_enter(sio_data);
-	if (err)
-		return err;
-
-	cr2a = sio_data->sio_inb(sio_data, 0x2a);
-	switch (data->kind) {
-	case nct6775:
-		data->have_vid = (cr2a & 0x40);
-		break;
-	case nct6776:
-		data->have_vid = (cr2a & 0x60) == 0x40;
-		break;
-	case nct6106:
-	case nct6116:
-	case nct6779:
-	case nct6791:
-	case nct6792:
-	case nct6793:
-	case nct6795:
-	case nct6796:
-	case nct6797:
-	case nct6798:
-		break;
-	}
-
-	/*
-	 * Read VID value
-	 * We can get the VID input values directly at logical device D 0xe3.
-	 */
-	if (data->have_vid) {
-		sio_data->sio_select(sio_data, NCT6775_LD_VID);
-		data->vid = sio_data->sio_inb(sio_data, 0xe3);
-		data->vrm = vid_which_vrm();
-	}
-
-	if (fan_debounce) {
-		u8 tmp;
-
-		sio_data->sio_select(sio_data, NCT6775_LD_HWM);
-		tmp = sio_data->sio_inb(sio_data,
-				    NCT6775_REG_CR_FAN_DEBOUNCE);
-		switch (data->kind) {
-		case nct6106:
-		case nct6116:
-			tmp |= 0xe0;
-			break;
-		case nct6775:
-			tmp |= 0x1e;
-			break;
-		case nct6776:
-		case nct6779:
-			tmp |= 0x3e;
-			break;
-		case nct6791:
-		case nct6792:
-		case nct6793:
-		case nct6795:
-		case nct6796:
-		case nct6797:
-		case nct6798:
-			tmp |= 0x7e;
-			break;
-		}
-		sio_data->sio_outb(sio_data, NCT6775_REG_CR_FAN_DEBOUNCE,
-			     tmp);
-		dev_info(&pdev->dev, "Enabled fan debounce for chip %s\n",
-			 data->name);
+	if (data->driver_init) {
+		err = data->driver_init(data);
+		if (err)
+			return err;
 	}
 
-	nct6775_check_fan_inputs(data, sio_data);
-
-	sio_data->sio_exit(sio_data);
-
 	/* Read fan clock dividers immediately */
 	nct6775_init_fan_common(dev, data);
 
@@ -4888,404 +3935,12 @@ static int nct6775_probe(struct platform_device *pdev)
 			return err;
 	}
 
-	err = nct6775_add_attr_group(data, &nct6775_group_other);
-	if (err)
-		return err;
-
 	hwmon_dev = devm_hwmon_device_register_with_groups(dev, data->name,
 							   data, data->groups);
 	return PTR_ERR_OR_ZERO(hwmon_dev);
 }
-
-static void nct6791_enable_io_mapping(struct nct6775_sio_data *sio_data)
-{
-	int val;
-
-	val = sio_data->sio_inb(sio_data, NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE);
-	if (val & 0x10) {
-		pr_info("Enabling hardware monitor logical device mappings.\n");
-		sio_data->sio_outb(sio_data, NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE,
-			       val & ~0x10);
-	}
-}
-
-static int __maybe_unused nct6775_suspend(struct device *dev)
-{
-	struct nct6775_data *data = nct6775_update_device(dev);
-
-	mutex_lock(&data->update_lock);
-	data->vbat = data->read_value(data, data->REG_VBAT);
-	if (data->kind == nct6775) {
-		data->fandiv1 = data->read_value(data, NCT6775_REG_FANDIV1);
-		data->fandiv2 = data->read_value(data, NCT6775_REG_FANDIV2);
-	}
-	mutex_unlock(&data->update_lock);
-
-	return 0;
-}
-
-static int __maybe_unused nct6775_resume(struct device *dev)
-{
-	struct nct6775_data *data = dev_get_drvdata(dev);
-	struct nct6775_sio_data *sio_data = dev_get_platdata(dev);
-	int i, j, err = 0;
-	u8 reg;
-
-	mutex_lock(&data->update_lock);
-	data->bank = 0xff;		/* Force initial bank selection */
-
-	err = sio_data->sio_enter(sio_data);
-	if (err)
-		goto abort;
-
-	sio_data->sio_select(sio_data, NCT6775_LD_HWM);
-	reg = sio_data->sio_inb(sio_data, SIO_REG_ENABLE);
-	if (reg != data->sio_reg_enable)
-		sio_data->sio_outb(sio_data, SIO_REG_ENABLE, data->sio_reg_enable);
-
-	if (data->kind == nct6791 || data->kind == nct6792 ||
-	    data->kind == nct6793 || data->kind == nct6795 ||
-	    data->kind == nct6796 || data->kind == nct6797 ||
-	    data->kind == nct6798)
-		nct6791_enable_io_mapping(sio_data);
-
-	sio_data->sio_exit(sio_data);
-
-	/* Restore limits */
-	for (i = 0; i < data->in_num; i++) {
-		if (!(data->have_in & BIT(i)))
-			continue;
-
-		data->write_value(data, data->REG_IN_MINMAX[0][i],
-				  data->in[i][1]);
-		data->write_value(data, data->REG_IN_MINMAX[1][i],
-				  data->in[i][2]);
-	}
-
-	for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
-		if (!(data->has_fan_min & BIT(i)))
-			continue;
-
-		data->write_value(data, data->REG_FAN_MIN[i],
-				  data->fan_min[i]);
-	}
-
-	for (i = 0; i < NUM_TEMP; i++) {
-		if (!(data->have_temp & BIT(i)))
-			continue;
-
-		for (j = 1; j < ARRAY_SIZE(data->reg_temp); j++)
-			if (data->reg_temp[j][i])
-				nct6775_write_temp(data, data->reg_temp[j][i],
-						   data->temp[j][i]);
-	}
-
-	/* Restore other settings */
-	data->write_value(data, data->REG_VBAT, data->vbat);
-	if (data->kind == nct6775) {
-		data->write_value(data, NCT6775_REG_FANDIV1, data->fandiv1);
-		data->write_value(data, NCT6775_REG_FANDIV2, data->fandiv2);
-	}
-
-abort:
-	/* Force re-reading all values */
-	data->valid = false;
-	mutex_unlock(&data->update_lock);
-
-	return err;
-}
-
-static SIMPLE_DEV_PM_OPS(nct6775_dev_pm_ops, nct6775_suspend, nct6775_resume);
-
-static struct platform_driver nct6775_driver = {
-	.driver = {
-		.name	= DRVNAME,
-		.pm	= &nct6775_dev_pm_ops,
-	},
-	.probe		= nct6775_probe,
-};
-
-/* nct6775_find() looks for a '627 in the Super-I/O config space */
-static int __init nct6775_find(int sioaddr, struct nct6775_sio_data *sio_data)
-{
-	u16 val;
-	int err;
-	int addr;
-
-	sio_data->access = access_direct;
-	sio_data->sioreg = sioaddr;
-
-	err = sio_data->sio_enter(sio_data);
-	if (err)
-		return err;
-
-	val = (sio_data->sio_inb(sio_data, SIO_REG_DEVID) << 8) |
-		sio_data->sio_inb(sio_data, SIO_REG_DEVID + 1);
-	if (force_id && val != 0xffff)
-		val = force_id;
-
-	switch (val & SIO_ID_MASK) {
-	case SIO_NCT6106_ID:
-		sio_data->kind = nct6106;
-		break;
-	case SIO_NCT6116_ID:
-		sio_data->kind = nct6116;
-		break;
-	case SIO_NCT6775_ID:
-		sio_data->kind = nct6775;
-		break;
-	case SIO_NCT6776_ID:
-		sio_data->kind = nct6776;
-		break;
-	case SIO_NCT6779_ID:
-		sio_data->kind = nct6779;
-		break;
-	case SIO_NCT6791_ID:
-		sio_data->kind = nct6791;
-		break;
-	case SIO_NCT6792_ID:
-		sio_data->kind = nct6792;
-		break;
-	case SIO_NCT6793_ID:
-		sio_data->kind = nct6793;
-		break;
-	case SIO_NCT6795_ID:
-		sio_data->kind = nct6795;
-		break;
-	case SIO_NCT6796_ID:
-		sio_data->kind = nct6796;
-		break;
-	case SIO_NCT6797_ID:
-		sio_data->kind = nct6797;
-		break;
-	case SIO_NCT6798_ID:
-		sio_data->kind = nct6798;
-		break;
-	default:
-		if (val != 0xffff)
-			pr_debug("unsupported chip ID: 0x%04x\n", val);
-		sio_data->sio_exit(sio_data);
-		return -ENODEV;
-	}
-
-	/* We have a known chip, find the HWM I/O address */
-	sio_data->sio_select(sio_data, NCT6775_LD_HWM);
-	val = (sio_data->sio_inb(sio_data, SIO_REG_ADDR) << 8)
-	    | sio_data->sio_inb(sio_data, SIO_REG_ADDR + 1);
-	addr = val & IOREGION_ALIGNMENT;
-	if (addr == 0) {
-		pr_err("Refusing to enable a Super-I/O device with a base I/O port 0\n");
-		sio_data->sio_exit(sio_data);
-		return -ENODEV;
-	}
-
-	/* Activate logical device if needed */
-	val = sio_data->sio_inb(sio_data, SIO_REG_ENABLE);
-	if (!(val & 0x01)) {
-		pr_warn("Forcibly enabling Super-I/O. Sensor is probably unusable.\n");
-		sio_data->sio_outb(sio_data, SIO_REG_ENABLE, val | 0x01);
-	}
-
-	if (sio_data->kind == nct6791 || sio_data->kind == nct6792 ||
-	    sio_data->kind == nct6793 || sio_data->kind == nct6795 ||
-	    sio_data->kind == nct6796 || sio_data->kind == nct6797 ||
-	    sio_data->kind == nct6798)
-		nct6791_enable_io_mapping(sio_data);
-
-	sio_data->sio_exit(sio_data);
-	pr_info("Found %s or compatible chip at %#x:%#x\n",
-		nct6775_sio_names[sio_data->kind], sioaddr, addr);
-
-	return addr;
-}
-
-/*
- * when Super-I/O functions move to a separate file, the Super-I/O
- * bus will manage the lifetime of the device and this module will only keep
- * track of the nct6775 driver. But since we use platform_device_alloc(), we
- * must keep track of the device
- */
-static struct platform_device *pdev[2];
-
-static const char * const asus_wmi_boards[] = {
-	"ProArt X570-CREATOR WIFI",
-	"Pro B550M-C",
-	"Pro WS X570-ACE",
-	"PRIME B360-PLUS",
-	"PRIME B460-PLUS",
-	"PRIME B550-PLUS",
-	"PRIME B550M-A",
-	"PRIME B550M-A (WI-FI)",
-	"PRIME X570-P",
-	"PRIME X570-PRO",
-	"ROG CROSSHAIR VIII DARK HERO",
-	"ROG CROSSHAIR VIII FORMULA",
-	"ROG CROSSHAIR VIII HERO",
-	"ROG CROSSHAIR VIII IMPACT",
-	"ROG STRIX B550-A GAMING",
-	"ROG STRIX B550-E GAMING",
-	"ROG STRIX B550-F GAMING",
-	"ROG STRIX B550-F GAMING (WI-FI)",
-	"ROG STRIX B550-F GAMING WIFI II",
-	"ROG STRIX B550-I GAMING",
-	"ROG STRIX B550-XE GAMING (WI-FI)",
-	"ROG STRIX X570-E GAMING",
-	"ROG STRIX X570-F GAMING",
-	"ROG STRIX X570-I GAMING",
-	"ROG STRIX Z390-E GAMING",
-	"ROG STRIX Z390-F GAMING",
-	"ROG STRIX Z390-H GAMING",
-	"ROG STRIX Z390-I GAMING",
-	"ROG STRIX Z490-A GAMING",
-	"ROG STRIX Z490-E GAMING",
-	"ROG STRIX Z490-F GAMING",
-	"ROG STRIX Z490-G GAMING",
-	"ROG STRIX Z490-G GAMING (WI-FI)",
-	"ROG STRIX Z490-H GAMING",
-	"ROG STRIX Z490-I GAMING",
-	"TUF GAMING B550M-PLUS",
-	"TUF GAMING B550M-PLUS (WI-FI)",
-	"TUF GAMING B550-PLUS",
-	"TUF GAMING B550-PRO",
-	"TUF GAMING X570-PLUS",
-	"TUF GAMING X570-PLUS (WI-FI)",
-	"TUF GAMING X570-PRO (WI-FI)",
-	"TUF GAMING Z490-PLUS",
-	"TUF GAMING Z490-PLUS (WI-FI)",
-};
-
-static int __init sensors_nct6775_init(void)
-{
-	int i, err;
-	bool found = false;
-	int address;
-	struct resource res;
-	struct nct6775_sio_data sio_data;
-	int sioaddr[2] = { 0x2e, 0x4e };
-	enum sensor_access access = access_direct;
-	const char *board_vendor, *board_name;
-	u8 tmp;
-
-	err = platform_driver_register(&nct6775_driver);
-	if (err)
-		return err;
-
-	board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
-	board_name = dmi_get_system_info(DMI_BOARD_NAME);
-
-	if (board_name && board_vendor &&
-	    !strcmp(board_vendor, "ASUSTeK COMPUTER INC.")) {
-		err = match_string(asus_wmi_boards, ARRAY_SIZE(asus_wmi_boards),
-				   board_name);
-		if (err >= 0) {
-			/* if reading chip id via WMI succeeds, use WMI */
-			if (!nct6775_asuswmi_read(0, NCT6775_PORT_CHIPID, &tmp) && tmp) {
-				pr_info("Using Asus WMI to access %#x chip.\n", tmp);
-				access = access_asuswmi;
-			} else {
-				pr_err("Can't read ChipID by Asus WMI.\n");
-			}
-		}
-	}
-
-	/*
-	 * initialize sio_data->kind and sio_data->sioreg.
-	 *
-	 * when Super-I/O functions move to a separate file, the Super-I/O
-	 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
-	 * nct6775 hardware monitor, and call probe()
-	 */
-	for (i = 0; i < ARRAY_SIZE(pdev); i++) {
-		sio_data.sio_outb = superio_outb;
-		sio_data.sio_inb = superio_inb;
-		sio_data.sio_select = superio_select;
-		sio_data.sio_enter = superio_enter;
-		sio_data.sio_exit = superio_exit;
-
-		address = nct6775_find(sioaddr[i], &sio_data);
-		if (address <= 0)
-			continue;
-
-		found = true;
-
-		sio_data.access = access;
-
-		if (access == access_asuswmi) {
-			sio_data.sio_outb = superio_wmi_outb;
-			sio_data.sio_inb = superio_wmi_inb;
-			sio_data.sio_select = superio_wmi_select;
-			sio_data.sio_enter = superio_wmi_enter;
-			sio_data.sio_exit = superio_wmi_exit;
-		}
-
-		pdev[i] = platform_device_alloc(DRVNAME, address);
-		if (!pdev[i]) {
-			err = -ENOMEM;
-			goto exit_device_unregister;
-		}
-
-		err = platform_device_add_data(pdev[i], &sio_data,
-					       sizeof(struct nct6775_sio_data));
-		if (err)
-			goto exit_device_put;
-
-		if (sio_data.access == access_direct) {
-			memset(&res, 0, sizeof(res));
-			res.name = DRVNAME;
-			res.start = address + IOREGION_OFFSET;
-			res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
-			res.flags = IORESOURCE_IO;
-
-			err = acpi_check_resource_conflict(&res);
-			if (err) {
-				platform_device_put(pdev[i]);
-				pdev[i] = NULL;
-				continue;
-			}
-
-			err = platform_device_add_resources(pdev[i], &res, 1);
-			if (err)
-				goto exit_device_put;
-		}
-
-		/* platform_device_add calls probe() */
-		err = platform_device_add(pdev[i]);
-		if (err)
-			goto exit_device_put;
-	}
-	if (!found) {
-		err = -ENODEV;
-		goto exit_unregister;
-	}
-
-	return 0;
-
-exit_device_put:
-	platform_device_put(pdev[i]);
-exit_device_unregister:
-	while (--i >= 0) {
-		if (pdev[i])
-			platform_device_unregister(pdev[i]);
-	}
-exit_unregister:
-	platform_driver_unregister(&nct6775_driver);
-	return err;
-}
-
-static void __exit sensors_nct6775_exit(void)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(pdev); i++) {
-		if (pdev[i])
-			platform_device_unregister(pdev[i]);
-	}
-	platform_driver_unregister(&nct6775_driver);
-}
+EXPORT_SYMBOL_GPL(nct6775_probe);
 
 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
-MODULE_DESCRIPTION("Driver for NCT6775F and compatible chips");
+MODULE_DESCRIPTION("Core driver for NCT6775F and compatible chips");
 MODULE_LICENSE("GPL");
-
-module_init(sensors_nct6775_init);
-module_exit(sensors_nct6775_exit);
diff --git a/drivers/hwmon/nct6775-platform.c b/drivers/hwmon/nct6775-platform.c
new file mode 100644
index 000000000000..9bc794ba69e2
--- /dev/null
+++ b/drivers/hwmon/nct6775-platform.c
@@ -0,0 +1,1185 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * nct6775-platform - Platform driver for the hardware monitoring
+ *		      functionality of Nuvoton NCT677x Super-I/O chips
+ *
+ * Copyright (C) 2012  Guenter Roeck <linux@roeck-us.net>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon-vid.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/io.h>
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/wmi.h>
+
+#include "nct6775.h"
+
+enum sensor_access { access_direct, access_asuswmi };
+
+static const char * const nct6775_sio_names[] __initconst = {
+	"NCT6106D",
+	"NCT6116D",
+	"NCT6775F",
+	"NCT6776D/F",
+	"NCT6779D",
+	"NCT6791D",
+	"NCT6792D",
+	"NCT6793D",
+	"NCT6795D",
+	"NCT6796D",
+	"NCT6797D",
+	"NCT6798D",
+};
+
+static unsigned short force_id;
+module_param(force_id, ushort, 0);
+MODULE_PARM_DESC(force_id, "Override the detected device ID");
+
+static unsigned short fan_debounce;
+module_param(fan_debounce, ushort, 0);
+MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal");
+
+#define DRVNAME "nct6775-platform"
+
+#define NCT6775_PORT_CHIPID	0x58
+
+/*
+ * ISA constants
+ */
+
+#define IOREGION_ALIGNMENT	(~7)
+#define IOREGION_OFFSET		5
+#define IOREGION_LENGTH		2
+#define ADDR_REG_OFFSET		0
+#define DATA_REG_OFFSET		1
+
+/*
+ * Super-I/O constants and functions
+ */
+
+#define NCT6775_LD_ACPI		0x0a
+#define NCT6775_LD_HWM		0x0b
+#define NCT6775_LD_VID		0x0d
+#define NCT6775_LD_12		0x12
+
+#define SIO_REG_LDSEL		0x07	/* Logical device select */
+#define SIO_REG_DEVID		0x20	/* Device ID (2 bytes) */
+#define SIO_REG_ENABLE		0x30	/* Logical device enable */
+#define SIO_REG_ADDR		0x60	/* Logical device address (2 bytes) */
+
+#define SIO_NCT6106_ID		0xc450
+#define SIO_NCT6116_ID		0xd280
+#define SIO_NCT6775_ID		0xb470
+#define SIO_NCT6776_ID		0xc330
+#define SIO_NCT6779_ID		0xc560
+#define SIO_NCT6791_ID		0xc800
+#define SIO_NCT6792_ID		0xc910
+#define SIO_NCT6793_ID		0xd120
+#define SIO_NCT6795_ID		0xd350
+#define SIO_NCT6796_ID		0xd420
+#define SIO_NCT6797_ID		0xd450
+#define SIO_NCT6798_ID		0xd428
+#define SIO_ID_MASK		0xFFF8
+
+/*
+ * Control registers
+ */
+#define NCT6775_REG_CR_FAN_DEBOUNCE	0xf0
+
+struct nct6775_sio_data {
+	int sioreg;
+	int ld;
+	enum kinds kind;
+	enum sensor_access access;
+
+	/* superio_() callbacks  */
+	void (*sio_outb)(struct nct6775_sio_data *sio_data, int reg, int val);
+	int (*sio_inb)(struct nct6775_sio_data *sio_data, int reg);
+	void (*sio_select)(struct nct6775_sio_data *sio_data, int ld);
+	int (*sio_enter)(struct nct6775_sio_data *sio_data);
+	void (*sio_exit)(struct nct6775_sio_data *sio_data);
+};
+
+#define ASUSWMI_MONITORING_GUID		"466747A0-70EC-11DE-8A39-0800200C9A66"
+#define ASUSWMI_METHODID_RSIO		0x5253494F
+#define ASUSWMI_METHODID_WSIO		0x5753494F
+#define ASUSWMI_METHODID_RHWM		0x5248574D
+#define ASUSWMI_METHODID_WHWM		0x5748574D
+#define ASUSWMI_UNSUPPORTED_METHOD	0xFFFFFFFE
+
+static int nct6775_asuswmi_evaluate_method(u32 method_id, u8 bank, u8 reg, u8 val, u32 *retval)
+{
+#if IS_ENABLED(CONFIG_ACPI_WMI)
+	u32 args = bank | (reg << 8) | (val << 16);
+	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_status status;
+	union acpi_object *obj;
+	u32 tmp = ASUSWMI_UNSUPPORTED_METHOD;
+
+	status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0,
+				     method_id, &input, &output);
+
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	obj = output.pointer;
+	if (obj && obj->type == ACPI_TYPE_INTEGER)
+		tmp = obj->integer.value;
+
+	if (retval)
+		*retval = tmp;
+
+	kfree(obj);
+
+	if (tmp == ASUSWMI_UNSUPPORTED_METHOD)
+		return -ENODEV;
+	return 0;
+#else
+	return -EOPNOTSUPP;
+#endif
+}
+
+static inline int nct6775_asuswmi_write(u8 bank, u8 reg, u8 val)
+{
+	return nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_WHWM, bank,
+					      reg, val, NULL);
+}
+
+static inline int nct6775_asuswmi_read(u8 bank, u8 reg, u8 *val)
+{
+	u32 ret, tmp = 0;
+
+	ret = nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_RHWM, bank,
+					      reg, 0, &tmp);
+	*val = tmp;
+	return ret;
+}
+
+static int superio_wmi_inb(struct nct6775_sio_data *sio_data, int reg)
+{
+	int tmp = 0;
+
+	nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_RSIO, sio_data->ld,
+					reg, 0, &tmp);
+	return tmp;
+}
+
+static void superio_wmi_outb(struct nct6775_sio_data *sio_data, int reg, int val)
+{
+	nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_WSIO, sio_data->ld,
+					reg, val, NULL);
+}
+
+static void superio_wmi_select(struct nct6775_sio_data *sio_data, int ld)
+{
+	sio_data->ld = ld;
+}
+
+static int superio_wmi_enter(struct nct6775_sio_data *sio_data)
+{
+	return 0;
+}
+
+static void superio_wmi_exit(struct nct6775_sio_data *sio_data)
+{
+}
+
+static void superio_outb(struct nct6775_sio_data *sio_data, int reg, int val)
+{
+	int ioreg = sio_data->sioreg;
+
+	outb(reg, ioreg);
+	outb(val, ioreg + 1);
+}
+
+static int superio_inb(struct nct6775_sio_data *sio_data, int reg)
+{
+	int ioreg = sio_data->sioreg;
+
+	outb(reg, ioreg);
+	return inb(ioreg + 1);
+}
+
+static void superio_select(struct nct6775_sio_data *sio_data, int ld)
+{
+	int ioreg = sio_data->sioreg;
+
+	outb(SIO_REG_LDSEL, ioreg);
+	outb(ld, ioreg + 1);
+}
+
+static int superio_enter(struct nct6775_sio_data *sio_data)
+{
+	int ioreg = sio_data->sioreg;
+
+	/*
+	 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
+	 */
+	if (!request_muxed_region(ioreg, 2, DRVNAME))
+		return -EBUSY;
+
+	outb(0x87, ioreg);
+	outb(0x87, ioreg);
+
+	return 0;
+}
+
+static void superio_exit(struct nct6775_sio_data *sio_data)
+{
+	int ioreg = sio_data->sioreg;
+
+	outb(0xaa, ioreg);
+	outb(0x02, ioreg);
+	outb(0x02, ioreg + 1);
+	release_region(ioreg, 2);
+}
+
+static inline void nct6775_wmi_set_bank(struct nct6775_data *data, u16 reg)
+{
+	u8 bank = reg >> 8;
+
+	data->bank = bank;
+}
+
+static u16 nct6775_wmi_read_value(struct nct6775_data *data, u16 reg)
+{
+	int res, err, word_sized = nct6775_reg_is_word_sized(data, reg);
+	u8 tmp = 0;
+
+	nct6775_wmi_set_bank(data, reg);
+
+	err = nct6775_asuswmi_read(data->bank, reg & 0xff, &tmp);
+	if (err)
+		return 0;
+
+	res = tmp;
+	if (word_sized) {
+		err = nct6775_asuswmi_read(data->bank, (reg & 0xff) + 1, &tmp);
+		if (err)
+			return 0;
+
+		res = (res << 8) + tmp;
+	}
+	return res;
+}
+
+static int nct6775_wmi_write_value(struct nct6775_data *data, u16 reg, u16 value)
+{
+	int res, word_sized = nct6775_reg_is_word_sized(data, reg);
+
+	nct6775_wmi_set_bank(data, reg);
+
+	if (word_sized) {
+		res = nct6775_asuswmi_write(data->bank, reg & 0xff, value >> 8);
+		if (res)
+			return res;
+
+		res = nct6775_asuswmi_write(data->bank, (reg & 0xff) + 1, value);
+	} else {
+		res = nct6775_asuswmi_write(data->bank, reg & 0xff, value);
+	}
+
+	return res;
+}
+
+/*
+ * On older chips, only registers 0x50-0x5f are banked.
+ * On more recent chips, all registers are banked.
+ * Assume that is the case and set the bank number for each access.
+ * Cache the bank number so it only needs to be set if it changes.
+ */
+static inline void nct6775_set_bank(struct nct6775_data *data, u16 reg)
+{
+	u8 bank = reg >> 8;
+
+	if (data->bank != bank) {
+		outb_p(NCT6775_REG_BANK, data->addr + ADDR_REG_OFFSET);
+		outb_p(bank, data->addr + DATA_REG_OFFSET);
+		data->bank = bank;
+	}
+}
+
+static u16 nct6775_read_value(struct nct6775_data *data, u16 reg)
+{
+	int res, word_sized = nct6775_reg_is_word_sized(data, reg);
+
+	nct6775_set_bank(data, reg);
+	outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET);
+	res = inb_p(data->addr + DATA_REG_OFFSET);
+	if (word_sized) {
+		outb_p((reg & 0xff) + 1,
+		       data->addr + ADDR_REG_OFFSET);
+		res = (res << 8) + inb_p(data->addr + DATA_REG_OFFSET);
+	}
+	return res;
+}
+
+static int nct6775_write_value(struct nct6775_data *data, u16 reg, u16 value)
+{
+	int word_sized = nct6775_reg_is_word_sized(data, reg);
+
+	nct6775_set_bank(data, reg);
+	outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET);
+	if (word_sized) {
+		outb_p(value >> 8, data->addr + DATA_REG_OFFSET);
+		outb_p((reg & 0xff) + 1,
+		       data->addr + ADDR_REG_OFFSET);
+	}
+	outb_p(value & 0xff, data->addr + DATA_REG_OFFSET);
+	return 0;
+}
+
+static void nct6791_enable_io_mapping(struct nct6775_sio_data *sio_data)
+{
+	int val;
+
+	val = sio_data->sio_inb(sio_data, NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE);
+	if (val & 0x10) {
+		pr_info("Enabling hardware monitor logical device mappings.\n");
+		sio_data->sio_outb(sio_data, NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE,
+			       val & ~0x10);
+	}
+}
+
+static int __maybe_unused nct6775_suspend(struct device *dev)
+{
+	struct nct6775_data *data = nct6775_update_device(dev);
+
+	mutex_lock(&data->update_lock);
+	data->vbat = data->read_value(data, data->REG_VBAT);
+	if (data->kind == nct6775) {
+		data->fandiv1 = data->read_value(data, NCT6775_REG_FANDIV1);
+		data->fandiv2 = data->read_value(data, NCT6775_REG_FANDIV2);
+	}
+	mutex_unlock(&data->update_lock);
+
+	return 0;
+}
+
+static int __maybe_unused nct6775_resume(struct device *dev)
+{
+	struct nct6775_data *data = dev_get_drvdata(dev);
+	struct nct6775_sio_data *sio_data = dev_get_platdata(dev);
+	int i, j, err = 0;
+	u8 reg;
+
+	mutex_lock(&data->update_lock);
+	data->bank = 0xff;		/* Force initial bank selection */
+
+	err = sio_data->sio_enter(sio_data);
+	if (err)
+		goto abort;
+
+	sio_data->sio_select(sio_data, NCT6775_LD_HWM);
+	reg = sio_data->sio_inb(sio_data, SIO_REG_ENABLE);
+	if (reg != data->sio_reg_enable)
+		sio_data->sio_outb(sio_data, SIO_REG_ENABLE, data->sio_reg_enable);
+
+	if (data->kind == nct6791 || data->kind == nct6792 ||
+	    data->kind == nct6793 || data->kind == nct6795 ||
+	    data->kind == nct6796 || data->kind == nct6797 ||
+	    data->kind == nct6798)
+		nct6791_enable_io_mapping(sio_data);
+
+	sio_data->sio_exit(sio_data);
+
+	/* Restore limits */
+	for (i = 0; i < data->in_num; i++) {
+		if (!(data->have_in & BIT(i)))
+			continue;
+
+		data->write_value(data, data->REG_IN_MINMAX[0][i],
+				  data->in[i][1]);
+		data->write_value(data, data->REG_IN_MINMAX[1][i],
+				  data->in[i][2]);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
+		if (!(data->has_fan_min & BIT(i)))
+			continue;
+
+		data->write_value(data, data->REG_FAN_MIN[i],
+				  data->fan_min[i]);
+	}
+
+	for (i = 0; i < NUM_TEMP; i++) {
+		if (!(data->have_temp & BIT(i)))
+			continue;
+
+		for (j = 1; j < ARRAY_SIZE(data->reg_temp); j++)
+			if (data->reg_temp[j][i])
+				nct6775_write_temp(data, data->reg_temp[j][i],
+						   data->temp[j][i]);
+	}
+
+	/* Restore other settings */
+	data->write_value(data, data->REG_VBAT, data->vbat);
+	if (data->kind == nct6775) {
+		data->write_value(data, NCT6775_REG_FANDIV1, data->fandiv1);
+		data->write_value(data, NCT6775_REG_FANDIV2, data->fandiv2);
+	}
+
+abort:
+	/* Force re-reading all values */
+	data->valid = false;
+	mutex_unlock(&data->update_lock);
+
+	return err;
+}
+
+static SIMPLE_DEV_PM_OPS(nct6775_dev_pm_ops, nct6775_suspend, nct6775_resume);
+
+static void
+nct6775_check_fan_inputs(struct nct6775_data *data, struct nct6775_sio_data *sio_data)
+{
+	bool fan3pin = false, fan4pin = false, fan4min = false;
+	bool fan5pin = false, fan6pin = false, fan7pin = false;
+	bool pwm3pin = false, pwm4pin = false, pwm5pin = false;
+	bool pwm6pin = false, pwm7pin = false;
+
+	/* Store SIO_REG_ENABLE for use during resume */
+	sio_data->sio_select(sio_data, NCT6775_LD_HWM);
+	data->sio_reg_enable = sio_data->sio_inb(sio_data, SIO_REG_ENABLE);
+
+	/* fan4 and fan5 share some pins with the GPIO and serial flash */
+	if (data->kind == nct6775) {
+		int cr2c = sio_data->sio_inb(sio_data, 0x2c);
+
+		fan3pin = cr2c & BIT(6);
+		pwm3pin = cr2c & BIT(7);
+
+		/* On NCT6775, fan4 shares pins with the fdc interface */
+		fan4pin = !(sio_data->sio_inb(sio_data, 0x2A) & 0x80);
+	} else if (data->kind == nct6776) {
+		bool gpok = sio_data->sio_inb(sio_data, 0x27) & 0x80;
+		const char *board_vendor, *board_name;
+
+		board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
+		board_name = dmi_get_system_info(DMI_BOARD_NAME);
+
+		if (board_name && board_vendor &&
+		    !strcmp(board_vendor, "ASRock")) {
+			/*
+			 * Auxiliary fan monitoring is not enabled on ASRock
+			 * Z77 Pro4-M if booted in UEFI Ultra-FastBoot mode.
+			 * Observed with BIOS version 2.00.
+			 */
+			if (!strcmp(board_name, "Z77 Pro4-M")) {
+				if ((data->sio_reg_enable & 0xe0) != 0xe0) {
+					data->sio_reg_enable |= 0xe0;
+					sio_data->sio_outb(sio_data, SIO_REG_ENABLE,
+						     data->sio_reg_enable);
+				}
+			}
+		}
+
+		if (data->sio_reg_enable & 0x80)
+			fan3pin = gpok;
+		else
+			fan3pin = !(sio_data->sio_inb(sio_data, 0x24) & 0x40);
+
+		if (data->sio_reg_enable & 0x40)
+			fan4pin = gpok;
+		else
+			fan4pin = sio_data->sio_inb(sio_data, 0x1C) & 0x01;
+
+		if (data->sio_reg_enable & 0x20)
+			fan5pin = gpok;
+		else
+			fan5pin = sio_data->sio_inb(sio_data, 0x1C) & 0x02;
+
+		fan4min = fan4pin;
+		pwm3pin = fan3pin;
+	} else if (data->kind == nct6106) {
+		int cr24 = sio_data->sio_inb(sio_data, 0x24);
+
+		fan3pin = !(cr24 & 0x80);
+		pwm3pin = cr24 & 0x08;
+	} else if (data->kind == nct6116) {
+		int cr1a = sio_data->sio_inb(sio_data, 0x1a);
+		int cr1b = sio_data->sio_inb(sio_data, 0x1b);
+		int cr24 = sio_data->sio_inb(sio_data, 0x24);
+		int cr2a = sio_data->sio_inb(sio_data, 0x2a);
+		int cr2b = sio_data->sio_inb(sio_data, 0x2b);
+		int cr2f = sio_data->sio_inb(sio_data, 0x2f);
+
+		fan3pin = !(cr2b & 0x10);
+		fan4pin = (cr2b & 0x80) ||			// pin 1(2)
+			(!(cr2f & 0x10) && (cr1a & 0x04));	// pin 65(66)
+		fan5pin = (cr2b & 0x80) ||			// pin 126(127)
+			(!(cr1b & 0x03) && (cr2a & 0x02));	// pin 94(96)
+
+		pwm3pin = fan3pin && (cr24 & 0x08);
+		pwm4pin = fan4pin;
+		pwm5pin = fan5pin;
+	} else {
+		/*
+		 * NCT6779D, NCT6791D, NCT6792D, NCT6793D, NCT6795D, NCT6796D,
+		 * NCT6797D, NCT6798D
+		 */
+		int cr1a = sio_data->sio_inb(sio_data, 0x1a);
+		int cr1b = sio_data->sio_inb(sio_data, 0x1b);
+		int cr1c = sio_data->sio_inb(sio_data, 0x1c);
+		int cr1d = sio_data->sio_inb(sio_data, 0x1d);
+		int cr2a = sio_data->sio_inb(sio_data, 0x2a);
+		int cr2b = sio_data->sio_inb(sio_data, 0x2b);
+		int cr2d = sio_data->sio_inb(sio_data, 0x2d);
+		int cr2f = sio_data->sio_inb(sio_data, 0x2f);
+		bool dsw_en = cr2f & BIT(3);
+		bool ddr4_en = cr2f & BIT(4);
+		int cre0;
+		int creb;
+		int cred;
+
+		sio_data->sio_select(sio_data, NCT6775_LD_12);
+		cre0 = sio_data->sio_inb(sio_data, 0xe0);
+		creb = sio_data->sio_inb(sio_data, 0xeb);
+		cred = sio_data->sio_inb(sio_data, 0xed);
+
+		fan3pin = !(cr1c & BIT(5));
+		fan4pin = !(cr1c & BIT(6));
+		fan5pin = !(cr1c & BIT(7));
+
+		pwm3pin = !(cr1c & BIT(0));
+		pwm4pin = !(cr1c & BIT(1));
+		pwm5pin = !(cr1c & BIT(2));
+
+		switch (data->kind) {
+		case nct6791:
+			fan6pin = cr2d & BIT(1);
+			pwm6pin = cr2d & BIT(0);
+			break;
+		case nct6792:
+			fan6pin = !dsw_en && (cr2d & BIT(1));
+			pwm6pin = !dsw_en && (cr2d & BIT(0));
+			break;
+		case nct6793:
+			fan5pin |= cr1b & BIT(5);
+			fan5pin |= creb & BIT(5);
+
+			fan6pin = !dsw_en && (cr2d & BIT(1));
+			fan6pin |= creb & BIT(3);
+
+			pwm5pin |= cr2d & BIT(7);
+			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
+
+			pwm6pin = !dsw_en && (cr2d & BIT(0));
+			pwm6pin |= creb & BIT(2);
+			break;
+		case nct6795:
+			fan5pin |= cr1b & BIT(5);
+			fan5pin |= creb & BIT(5);
+
+			fan6pin = (cr2a & BIT(4)) &&
+					(!dsw_en || (cred & BIT(4)));
+			fan6pin |= creb & BIT(3);
+
+			pwm5pin |= cr2d & BIT(7);
+			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
+
+			pwm6pin = (cr2a & BIT(3)) && (cred & BIT(2));
+			pwm6pin |= creb & BIT(2);
+			break;
+		case nct6796:
+			fan5pin |= cr1b & BIT(5);
+			fan5pin |= (cre0 & BIT(3)) && !(cr1b & BIT(0));
+			fan5pin |= creb & BIT(5);
+
+			fan6pin = (cr2a & BIT(4)) &&
+					(!dsw_en || (cred & BIT(4)));
+			fan6pin |= creb & BIT(3);
+
+			fan7pin = !(cr2b & BIT(2));
+
+			pwm5pin |= cr2d & BIT(7);
+			pwm5pin |= (cre0 & BIT(4)) && !(cr1b & BIT(0));
+			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
+
+			pwm6pin = (cr2a & BIT(3)) && (cred & BIT(2));
+			pwm6pin |= creb & BIT(2);
+
+			pwm7pin = !(cr1d & (BIT(2) | BIT(3)));
+			break;
+		case nct6797:
+			fan5pin |= !ddr4_en && (cr1b & BIT(5));
+			fan5pin |= creb & BIT(5);
+
+			fan6pin = cr2a & BIT(4);
+			fan6pin |= creb & BIT(3);
+
+			fan7pin = cr1a & BIT(1);
+
+			pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
+			pwm5pin |= !ddr4_en && (cr2d & BIT(7));
+
+			pwm6pin = creb & BIT(2);
+			pwm6pin |= cred & BIT(2);
+
+			pwm7pin = cr1d & BIT(4);
+			break;
+		case nct6798:
+			fan6pin = !(cr1b & BIT(0)) && (cre0 & BIT(3));
+			fan6pin |= cr2a & BIT(4);
+			fan6pin |= creb & BIT(5);
+
+			fan7pin = cr1b & BIT(5);
+			fan7pin |= !(cr2b & BIT(2));
+			fan7pin |= creb & BIT(3);
+
+			pwm6pin = !(cr1b & BIT(0)) && (cre0 & BIT(4));
+			pwm6pin |= !(cred & BIT(2)) && (cr2a & BIT(3));
+			pwm6pin |= (creb & BIT(4)) && !(cr2a & BIT(0));
+
+			pwm7pin = !(cr1d & (BIT(2) | BIT(3)));
+			pwm7pin |= cr2d & BIT(7);
+			pwm7pin |= creb & BIT(2);
+			break;
+		default:	/* NCT6779D */
+			break;
+		}
+
+		fan4min = fan4pin;
+	}
+
+	/* fan 1 and 2 (0x03) are always present */
+	data->has_fan = 0x03 | (fan3pin << 2) | (fan4pin << 3) |
+		(fan5pin << 4) | (fan6pin << 5) | (fan7pin << 6);
+	data->has_fan_min = 0x03 | (fan3pin << 2) | (fan4min << 3) |
+		(fan5pin << 4) | (fan6pin << 5) | (fan7pin << 6);
+	data->has_pwm = 0x03 | (pwm3pin << 2) | (pwm4pin << 3) |
+		(pwm5pin << 4) | (pwm6pin << 5) | (pwm7pin << 6);
+}
+
+static ssize_t
+cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct nct6775_data *data = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
+}
+
+static DEVICE_ATTR_RO(cpu0_vid);
+
+/* Case open detection */
+
+static const u8 NCT6775_REG_CR_CASEOPEN_CLR[] = { 0xe6, 0xee };
+static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = { 0x20, 0x01 };
+
+static ssize_t
+clear_caseopen(struct device *dev, struct device_attribute *attr,
+	       const char *buf, size_t count)
+{
+	struct nct6775_data *data = dev_get_drvdata(dev);
+	struct nct6775_sio_data *sio_data = data->driver_data;
+	int nr = to_sensor_dev_attr(attr)->index - INTRUSION_ALARM_BASE;
+	unsigned long val;
+	u8 reg;
+	int ret;
+
+	if (kstrtoul(buf, 10, &val) || val != 0)
+		return -EINVAL;
+
+	mutex_lock(&data->update_lock);
+
+	/*
+	 * Use CR registers to clear caseopen status.
+	 * The CR registers are the same for all chips, and not all chips
+	 * support clearing the caseopen status through "regular" registers.
+	 */
+	ret = sio_data->sio_enter(sio_data);
+	if (ret) {
+		count = ret;
+		goto error;
+	}
+
+	sio_data->sio_select(sio_data, NCT6775_LD_ACPI);
+	reg = sio_data->sio_inb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr]);
+	reg |= NCT6775_CR_CASEOPEN_CLR_MASK[nr];
+	sio_data->sio_outb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg);
+	reg &= ~NCT6775_CR_CASEOPEN_CLR_MASK[nr];
+	sio_data->sio_outb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg);
+	sio_data->sio_exit(sio_data);
+
+	data->valid = false;	/* Force cache refresh */
+error:
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IWUSR | S_IRUGO, nct6775_show_alarm,
+			  clear_caseopen, INTRUSION_ALARM_BASE);
+static SENSOR_DEVICE_ATTR(intrusion1_alarm, S_IWUSR | S_IRUGO, nct6775_show_alarm,
+			  clear_caseopen, INTRUSION_ALARM_BASE + 1);
+static SENSOR_DEVICE_ATTR(intrusion0_beep, S_IWUSR | S_IRUGO, nct6775_show_beep,
+			  nct6775_store_beep, INTRUSION_ALARM_BASE);
+static SENSOR_DEVICE_ATTR(intrusion1_beep, S_IWUSR | S_IRUGO, nct6775_show_beep,
+			  nct6775_store_beep, INTRUSION_ALARM_BASE + 1);
+static SENSOR_DEVICE_ATTR(beep_enable, S_IWUSR | S_IRUGO, nct6775_show_beep,
+			  nct6775_store_beep, BEEP_ENABLE_BASE);
+
+static umode_t nct6775_other_is_visible(struct kobject *kobj,
+					struct attribute *attr, int index)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct nct6775_data *data = dev_get_drvdata(dev);
+
+	if (index == 0 && !data->have_vid)
+		return 0;
+
+	if (index == 1 || index == 2) {
+		if (data->ALARM_BITS[INTRUSION_ALARM_BASE + index - 1] < 0)
+			return 0;
+	}
+
+	if (index == 3 || index == 4) {
+		if (data->BEEP_BITS[INTRUSION_ALARM_BASE + index - 3] < 0)
+			return 0;
+	}
+
+	return nct6775_attr_mode(data, attr);
+}
+
+/*
+ * nct6775_other_is_visible uses the index into the following array
+ * to determine if attributes should be created or not.
+ * Any change in order or content must be matched.
+ */
+static struct attribute *nct6775_attributes_other[] = {
+	&dev_attr_cpu0_vid.attr,				/* 0 */
+	&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,	/* 1 */
+	&sensor_dev_attr_intrusion1_alarm.dev_attr.attr,	/* 2 */
+	&sensor_dev_attr_intrusion0_beep.dev_attr.attr,		/* 3 */
+	&sensor_dev_attr_intrusion1_beep.dev_attr.attr,		/* 4 */
+	&sensor_dev_attr_beep_enable.dev_attr.attr,		/* 5 */
+
+	NULL
+};
+
+static const struct attribute_group nct6775_group_other = {
+	.attrs = nct6775_attributes_other,
+	.is_visible = nct6775_other_is_visible,
+};
+
+static int nct6775_platform_probe_init(struct nct6775_data *data)
+{
+	int err;
+	u8 cr2a;
+	struct nct6775_sio_data *sio_data = data->driver_data;
+
+	err = sio_data->sio_enter(sio_data);
+	if (err)
+		return err;
+
+	cr2a = sio_data->sio_inb(sio_data, 0x2a);
+	switch (data->kind) {
+	case nct6775:
+		data->have_vid = (cr2a & 0x40);
+		break;
+	case nct6776:
+		data->have_vid = (cr2a & 0x60) == 0x40;
+		break;
+	case nct6106:
+	case nct6116:
+	case nct6779:
+	case nct6791:
+	case nct6792:
+	case nct6793:
+	case nct6795:
+	case nct6796:
+	case nct6797:
+	case nct6798:
+		break;
+	}
+
+	/*
+	 * Read VID value
+	 * We can get the VID input values directly at logical device D 0xe3.
+	 */
+	if (data->have_vid) {
+		sio_data->sio_select(sio_data, NCT6775_LD_VID);
+		data->vid = sio_data->sio_inb(sio_data, 0xe3);
+		data->vrm = vid_which_vrm();
+	}
+
+	if (fan_debounce) {
+		u8 tmp;
+
+		sio_data->sio_select(sio_data, NCT6775_LD_HWM);
+		tmp = sio_data->sio_inb(sio_data,
+				    NCT6775_REG_CR_FAN_DEBOUNCE);
+		switch (data->kind) {
+		case nct6106:
+		case nct6116:
+			tmp |= 0xe0;
+			break;
+		case nct6775:
+			tmp |= 0x1e;
+			break;
+		case nct6776:
+		case nct6779:
+			tmp |= 0x3e;
+			break;
+		case nct6791:
+		case nct6792:
+		case nct6793:
+		case nct6795:
+		case nct6796:
+		case nct6797:
+		case nct6798:
+			tmp |= 0x7e;
+			break;
+		}
+		sio_data->sio_outb(sio_data, NCT6775_REG_CR_FAN_DEBOUNCE,
+			     tmp);
+		pr_info("Enabled fan debounce for chip %s\n", data->name);
+	}
+
+	nct6775_check_fan_inputs(data, sio_data);
+
+	sio_data->sio_exit(sio_data);
+
+	return nct6775_add_attr_group(data, &nct6775_group_other);
+}
+
+static int nct6775_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct nct6775_sio_data *sio_data = dev_get_platdata(dev);
+	struct nct6775_data *data;
+	struct resource *res;
+
+	if (sio_data->access == access_direct) {
+		res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+		if (!devm_request_region(&pdev->dev, res->start, IOREGION_LENGTH, DRVNAME))
+			return -EBUSY;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->kind = sio_data->kind;
+	data->sioreg = sio_data->sioreg;
+
+	if (sio_data->access == access_direct) {
+		data->addr = res->start;
+		data->read_value = nct6775_read_value;
+		data->write_value = nct6775_write_value;
+	} else {
+		data->read_value = nct6775_wmi_read_value;
+		data->write_value = nct6775_wmi_write_value;
+	}
+
+	platform_set_drvdata(pdev, data);
+
+	data->driver_data = sio_data;
+	data->driver_init = nct6775_platform_probe_init;
+
+	return nct6775_probe(&pdev->dev, data);
+}
+
+static struct platform_driver nct6775_driver = {
+	.driver = {
+		.name	= DRVNAME,
+		.pm	= &nct6775_dev_pm_ops,
+	},
+	.probe		= nct6775_platform_probe,
+};
+
+/* nct6775_find() looks for a '627 in the Super-I/O config space */
+static int __init nct6775_find(int sioaddr, struct nct6775_sio_data *sio_data)
+{
+	u16 val;
+	int err;
+	int addr;
+
+	sio_data->access = access_direct;
+	sio_data->sioreg = sioaddr;
+
+	err = sio_data->sio_enter(sio_data);
+	if (err)
+		return err;
+
+	val = (sio_data->sio_inb(sio_data, SIO_REG_DEVID) << 8) |
+		sio_data->sio_inb(sio_data, SIO_REG_DEVID + 1);
+	if (force_id && val != 0xffff)
+		val = force_id;
+
+	switch (val & SIO_ID_MASK) {
+	case SIO_NCT6106_ID:
+		sio_data->kind = nct6106;
+		break;
+	case SIO_NCT6116_ID:
+		sio_data->kind = nct6116;
+		break;
+	case SIO_NCT6775_ID:
+		sio_data->kind = nct6775;
+		break;
+	case SIO_NCT6776_ID:
+		sio_data->kind = nct6776;
+		break;
+	case SIO_NCT6779_ID:
+		sio_data->kind = nct6779;
+		break;
+	case SIO_NCT6791_ID:
+		sio_data->kind = nct6791;
+		break;
+	case SIO_NCT6792_ID:
+		sio_data->kind = nct6792;
+		break;
+	case SIO_NCT6793_ID:
+		sio_data->kind = nct6793;
+		break;
+	case SIO_NCT6795_ID:
+		sio_data->kind = nct6795;
+		break;
+	case SIO_NCT6796_ID:
+		sio_data->kind = nct6796;
+		break;
+	case SIO_NCT6797_ID:
+		sio_data->kind = nct6797;
+		break;
+	case SIO_NCT6798_ID:
+		sio_data->kind = nct6798;
+		break;
+	default:
+		if (val != 0xffff)
+			pr_debug("unsupported chip ID: 0x%04x\n", val);
+		sio_data->sio_exit(sio_data);
+		return -ENODEV;
+	}
+
+	/* We have a known chip, find the HWM I/O address */
+	sio_data->sio_select(sio_data, NCT6775_LD_HWM);
+	val = (sio_data->sio_inb(sio_data, SIO_REG_ADDR) << 8)
+	    | sio_data->sio_inb(sio_data, SIO_REG_ADDR + 1);
+	addr = val & IOREGION_ALIGNMENT;
+	if (addr == 0) {
+		pr_err("Refusing to enable a Super-I/O device with a base I/O port 0\n");
+		sio_data->sio_exit(sio_data);
+		return -ENODEV;
+	}
+
+	/* Activate logical device if needed */
+	val = sio_data->sio_inb(sio_data, SIO_REG_ENABLE);
+	if (!(val & 0x01)) {
+		pr_warn("Forcibly enabling Super-I/O. Sensor is probably unusable.\n");
+		sio_data->sio_outb(sio_data, SIO_REG_ENABLE, val | 0x01);
+	}
+
+	if (sio_data->kind == nct6791 || sio_data->kind == nct6792 ||
+	    sio_data->kind == nct6793 || sio_data->kind == nct6795 ||
+	    sio_data->kind == nct6796 || sio_data->kind == nct6797 ||
+	    sio_data->kind == nct6798)
+		nct6791_enable_io_mapping(sio_data);
+
+	sio_data->sio_exit(sio_data);
+	pr_info("Found %s or compatible chip at %#x:%#x\n",
+		nct6775_sio_names[sio_data->kind], sioaddr, addr);
+
+	return addr;
+}
+
+/*
+ * when Super-I/O functions move to a separate file, the Super-I/O
+ * bus will manage the lifetime of the device and this module will only keep
+ * track of the nct6775 driver. But since we use platform_device_alloc(), we
+ * must keep track of the device
+ */
+static struct platform_device *pdev[2];
+
+static const char * const asus_wmi_boards[] = {
+	"ProArt X570-CREATOR WIFI",
+	"Pro B550M-C",
+	"Pro WS X570-ACE",
+	"PRIME B360-PLUS",
+	"PRIME B460-PLUS",
+	"PRIME B550-PLUS",
+	"PRIME B550M-A",
+	"PRIME B550M-A (WI-FI)",
+	"PRIME X570-P",
+	"PRIME X570-PRO",
+	"ROG CROSSHAIR VIII DARK HERO",
+	"ROG CROSSHAIR VIII FORMULA",
+	"ROG CROSSHAIR VIII HERO",
+	"ROG CROSSHAIR VIII IMPACT",
+	"ROG STRIX B550-A GAMING",
+	"ROG STRIX B550-E GAMING",
+	"ROG STRIX B550-F GAMING",
+	"ROG STRIX B550-F GAMING (WI-FI)",
+	"ROG STRIX B550-F GAMING WIFI II",
+	"ROG STRIX B550-I GAMING",
+	"ROG STRIX B550-XE GAMING (WI-FI)",
+	"ROG STRIX X570-E GAMING",
+	"ROG STRIX X570-F GAMING",
+	"ROG STRIX X570-I GAMING",
+	"ROG STRIX Z390-E GAMING",
+	"ROG STRIX Z390-F GAMING",
+	"ROG STRIX Z390-H GAMING",
+	"ROG STRIX Z390-I GAMING",
+	"ROG STRIX Z490-A GAMING",
+	"ROG STRIX Z490-E GAMING",
+	"ROG STRIX Z490-F GAMING",
+	"ROG STRIX Z490-G GAMING",
+	"ROG STRIX Z490-G GAMING (WI-FI)",
+	"ROG STRIX Z490-H GAMING",
+	"ROG STRIX Z490-I GAMING",
+	"TUF GAMING B550M-PLUS",
+	"TUF GAMING B550M-PLUS (WI-FI)",
+	"TUF GAMING B550-PLUS",
+	"TUF GAMING B550-PRO",
+	"TUF GAMING X570-PLUS",
+	"TUF GAMING X570-PLUS (WI-FI)",
+	"TUF GAMING X570-PRO (WI-FI)",
+	"TUF GAMING Z490-PLUS",
+	"TUF GAMING Z490-PLUS (WI-FI)",
+};
+
+static int __init sensors_nct6775_platform_init(void)
+{
+	int i, err;
+	bool found = false;
+	int address;
+	struct resource res;
+	struct nct6775_sio_data sio_data;
+	int sioaddr[2] = { 0x2e, 0x4e };
+	enum sensor_access access = access_direct;
+	const char *board_vendor, *board_name;
+	u8 tmp;
+
+	err = platform_driver_register(&nct6775_driver);
+	if (err)
+		return err;
+
+	board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
+	board_name = dmi_get_system_info(DMI_BOARD_NAME);
+
+	if (board_name && board_vendor &&
+	    !strcmp(board_vendor, "ASUSTeK COMPUTER INC.")) {
+		err = match_string(asus_wmi_boards, ARRAY_SIZE(asus_wmi_boards),
+				   board_name);
+		if (err >= 0) {
+			/* if reading chip id via WMI succeeds, use WMI */
+			if (!nct6775_asuswmi_read(0, NCT6775_PORT_CHIPID, &tmp) && tmp) {
+				pr_info("Using Asus WMI to access %#x chip.\n", tmp);
+				access = access_asuswmi;
+			} else {
+				pr_err("Can't read ChipID by Asus WMI.\n");
+			}
+		}
+	}
+
+	/*
+	 * initialize sio_data->kind and sio_data->sioreg.
+	 *
+	 * when Super-I/O functions move to a separate file, the Super-I/O
+	 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
+	 * nct6775 hardware monitor, and call probe()
+	 */
+	for (i = 0; i < ARRAY_SIZE(pdev); i++) {
+		sio_data.sio_outb = superio_outb;
+		sio_data.sio_inb = superio_inb;
+		sio_data.sio_select = superio_select;
+		sio_data.sio_enter = superio_enter;
+		sio_data.sio_exit = superio_exit;
+
+		address = nct6775_find(sioaddr[i], &sio_data);
+		if (address <= 0)
+			continue;
+
+		found = true;
+
+		sio_data.access = access;
+
+		if (access == access_asuswmi) {
+			sio_data.sio_outb = superio_wmi_outb;
+			sio_data.sio_inb = superio_wmi_inb;
+			sio_data.sio_select = superio_wmi_select;
+			sio_data.sio_enter = superio_wmi_enter;
+			sio_data.sio_exit = superio_wmi_exit;
+		}
+
+		pdev[i] = platform_device_alloc(DRVNAME, address);
+		if (!pdev[i]) {
+			err = -ENOMEM;
+			goto exit_device_unregister;
+		}
+
+		err = platform_device_add_data(pdev[i], &sio_data,
+					       sizeof(struct nct6775_sio_data));
+		if (err)
+			goto exit_device_put;
+
+		if (sio_data.access == access_direct) {
+			memset(&res, 0, sizeof(res));
+			res.name = DRVNAME;
+			res.start = address + IOREGION_OFFSET;
+			res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
+			res.flags = IORESOURCE_IO;
+
+			err = acpi_check_resource_conflict(&res);
+			if (err) {
+				platform_device_put(pdev[i]);
+				pdev[i] = NULL;
+				continue;
+			}
+
+			err = platform_device_add_resources(pdev[i], &res, 1);
+			if (err)
+				goto exit_device_put;
+		}
+
+		/* platform_device_add calls probe() */
+		err = platform_device_add(pdev[i]);
+		if (err)
+			goto exit_device_put;
+	}
+	if (!found) {
+		err = -ENODEV;
+		goto exit_unregister;
+	}
+
+	return 0;
+
+exit_device_put:
+	platform_device_put(pdev[i]);
+exit_device_unregister:
+	while (--i >= 0) {
+		if (pdev[i])
+			platform_device_unregister(pdev[i]);
+	}
+exit_unregister:
+	platform_driver_unregister(&nct6775_driver);
+	return err;
+}
+
+static void __exit sensors_nct6775_platform_exit(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(pdev); i++) {
+		if (pdev[i])
+			platform_device_unregister(pdev[i]);
+	}
+	platform_driver_unregister(&nct6775_driver);
+}
+
+MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
+MODULE_DESCRIPTION("Platform driver for NCT6775F and compatible chips");
+MODULE_LICENSE("GPL");
+
+/*
+ * For module-name compatibility with the original version of this driver
+ * prior to the core/platform/i2c split
+ */
+MODULE_ALIAS("nct6775");
+
+module_init(sensors_nct6775_platform_init);
+module_exit(sensors_nct6775_platform_exit);
diff --git a/drivers/hwmon/nct6775.h b/drivers/hwmon/nct6775.h
new file mode 100644
index 000000000000..1cb754a2284b
--- /dev/null
+++ b/drivers/hwmon/nct6775.h
@@ -0,0 +1,233 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __HWMON_NCT6775_H__
+#define __HWMON_NCT6775_H__
+
+#include <linux/types.h>
+
+enum kinds { nct6106, nct6116, nct6775, nct6776, nct6779, nct6791, nct6792,
+	     nct6793, nct6795, nct6796, nct6797, nct6798 };
+enum pwm_enable { off, manual, thermal_cruise, speed_cruise, sf3, sf4 };
+
+#define NUM_TEMP	10	/* Max number of temp attribute sets w/ limits*/
+#define NUM_TEMP_FIXED	6	/* Max number of fixed temp attribute sets */
+#define NUM_TSI_TEMP	8	/* Max number of TSI temp register pairs */
+
+#define NUM_REG_ALARM	7	/* Max number of alarm registers */
+#define NUM_REG_BEEP	5	/* Max number of beep registers */
+
+#define NUM_FAN		7
+
+struct nct6775_data {
+	int addr;	/* IO base of hw monitor block */
+	int sioreg;	/* SIO register address */
+	enum kinds kind;
+	const char *name;
+
+	const struct attribute_group *groups[7];
+	u8 num_groups;
+
+	u16 reg_temp[5][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst,
+				    * 3=temp_crit, 4=temp_lcrit
+				    */
+	u8 temp_src[NUM_TEMP];
+	u16 reg_temp_config[NUM_TEMP];
+	const char * const *temp_label;
+	u32 temp_mask;
+	u32 virt_temp_mask;
+
+	u16 REG_CONFIG;
+	u16 REG_VBAT;
+	u16 REG_DIODE;
+	u8 DIODE_MASK;
+
+	const s8 *ALARM_BITS;
+	const s8 *BEEP_BITS;
+
+	const u16 *REG_VIN;
+	const u16 *REG_IN_MINMAX[2];
+
+	const u16 *REG_TARGET;
+	const u16 *REG_FAN;
+	const u16 *REG_FAN_MODE;
+	const u16 *REG_FAN_MIN;
+	const u16 *REG_FAN_PULSES;
+	const u16 *FAN_PULSE_SHIFT;
+	const u16 *REG_FAN_TIME[3];
+
+	const u16 *REG_TOLERANCE_H;
+
+	const u8 *REG_PWM_MODE;
+	const u8 *PWM_MODE_MASK;
+
+	const u16 *REG_PWM[7];	/* [0]=pwm, [1]=pwm_start, [2]=pwm_floor,
+				 * [3]=pwm_max, [4]=pwm_step,
+				 * [5]=weight_duty_step, [6]=weight_duty_base
+				 */
+	const u16 *REG_PWM_READ;
+
+	const u16 *REG_CRITICAL_PWM_ENABLE;
+	u8 CRITICAL_PWM_ENABLE_MASK;
+	const u16 *REG_CRITICAL_PWM;
+
+	const u16 *REG_AUTO_TEMP;
+	const u16 *REG_AUTO_PWM;
+
+	const u16 *REG_CRITICAL_TEMP;
+	const u16 *REG_CRITICAL_TEMP_TOLERANCE;
+
+	const u16 *REG_TEMP_SOURCE;	/* temp register sources */
+	const u16 *REG_TEMP_SEL;
+	const u16 *REG_WEIGHT_TEMP_SEL;
+	const u16 *REG_WEIGHT_TEMP[3];	/* 0=base, 1=tolerance, 2=step */
+
+	const u16 *REG_TEMP_OFFSET;
+
+	const u16 *REG_ALARM;
+	const u16 *REG_BEEP;
+
+	const u16 *REG_TSI_TEMP;
+
+	unsigned int (*fan_from_reg)(u16 reg, unsigned int divreg);
+	unsigned int (*fan_from_reg_min)(u16 reg, unsigned int divreg);
+
+	struct mutex update_lock;
+	bool valid;		/* true if following fields are valid */
+	unsigned long last_updated;	/* In jiffies */
+
+	/* Register values */
+	u8 bank;		/* current register bank */
+	u8 in_num;		/* number of in inputs we have */
+	u8 in[15][3];		/* [0]=in, [1]=in_max, [2]=in_min */
+	unsigned int rpm[NUM_FAN];
+	u16 fan_min[NUM_FAN];
+	u8 fan_pulses[NUM_FAN];
+	u8 fan_div[NUM_FAN];
+	u8 has_pwm;
+	u8 has_fan;		/* some fan inputs can be disabled */
+	u8 has_fan_min;		/* some fans don't have min register */
+	bool has_fan_div;
+
+	u8 num_temp_alarms;	/* 2, 3, or 6 */
+	u8 num_temp_beeps;	/* 2, 3, or 6 */
+	u8 temp_fixed_num;	/* 3 or 6 */
+	u8 temp_type[NUM_TEMP_FIXED];
+	s8 temp_offset[NUM_TEMP_FIXED];
+	s16 temp[5][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst,
+				* 3=temp_crit, 4=temp_lcrit */
+	s16 tsi_temp[NUM_TSI_TEMP];
+	u64 alarms;
+	u64 beeps;
+
+	u8 pwm_num;	/* number of pwm */
+	u8 pwm_mode[NUM_FAN];	/* 0->DC variable voltage,
+				 * 1->PWM variable duty cycle
+				 */
+	enum pwm_enable pwm_enable[NUM_FAN];
+			/* 0->off
+			 * 1->manual
+			 * 2->thermal cruise mode (also called SmartFan I)
+			 * 3->fan speed cruise mode
+			 * 4->SmartFan III
+			 * 5->enhanced variable thermal cruise (SmartFan IV)
+			 */
+	u8 pwm[7][NUM_FAN];	/* [0]=pwm, [1]=pwm_start, [2]=pwm_floor,
+				 * [3]=pwm_max, [4]=pwm_step,
+				 * [5]=weight_duty_step, [6]=weight_duty_base
+				 */
+
+	u8 target_temp[NUM_FAN];
+	u8 target_temp_mask;
+	u32 target_speed[NUM_FAN];
+	u32 target_speed_tolerance[NUM_FAN];
+	u8 speed_tolerance_limit;
+
+	u8 temp_tolerance[2][NUM_FAN];
+	u8 tolerance_mask;
+
+	u8 fan_time[3][NUM_FAN]; /* 0 = stop_time, 1 = step_up, 2 = step_down */
+
+	/* Automatic fan speed control registers */
+	int auto_pwm_num;
+	u8 auto_pwm[NUM_FAN][7];
+	u8 auto_temp[NUM_FAN][7];
+	u8 pwm_temp_sel[NUM_FAN];
+	u8 pwm_weight_temp_sel[NUM_FAN];
+	u8 weight_temp[3][NUM_FAN];	/* 0->temp_step, 1->temp_step_tol,
+					 * 2->temp_base
+					 */
+
+	u8 vid;
+	u8 vrm;
+
+	bool have_vid;
+
+	u16 have_temp;
+	u16 have_temp_fixed;
+	u16 have_tsi_temp;
+	u16 have_in;
+
+	/* Remember extra register values over suspend/resume */
+	u8 vbat;
+	u8 fandiv1;
+	u8 fandiv2;
+	u8 sio_reg_enable;
+
+	/* nct6775_*() callbacks  */
+	u16 (*read_value)(struct nct6775_data *data, u16 reg);
+	int (*write_value)(struct nct6775_data *data, u16 reg, u16 value);
+
+	/* driver-specific (platform, i2c) initialization hook and data */
+	int (*driver_init)(struct nct6775_data *data);
+	void *driver_data;
+
+	bool read_only;
+};
+
+bool nct6775_reg_is_word_sized(struct nct6775_data *data, u16 reg);
+int nct6775_probe(struct device *dev, struct nct6775_data *data);
+struct nct6775_data *nct6775_update_device(struct device *dev);
+int nct6775_write_temp(struct nct6775_data *data, u16 reg, u16 value);
+
+ssize_t nct6775_show_alarm(struct device *dev, struct device_attribute *attr, char *buf);
+ssize_t nct6775_show_beep(struct device *dev, struct device_attribute *attr, char *buf);
+ssize_t nct6775_store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
+			   size_t count);
+
+static inline umode_t nct6775_attr_mode(struct nct6775_data *data, struct attribute *attr)
+{
+	return data->read_only ? (attr->mode & ~0222) : attr->mode;
+}
+
+static inline int
+nct6775_add_attr_group(struct nct6775_data *data, const struct attribute_group *group)
+{
+	/* Need to leave a NULL terminator at the end of data->groups */
+	if (WARN_ON(data->num_groups == ARRAY_SIZE(data->groups) - 1))
+		return -ENOSPC;
+
+	data->groups[data->num_groups++] = group;
+	return 0;
+}
+
+#define NCT6775_REG_BANK	0x4E
+#define NCT6775_REG_CONFIG	0x40
+
+#define NCT6775_REG_FANDIV1		0x506
+#define NCT6775_REG_FANDIV2		0x507
+
+#define NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE	0x28
+
+#define FAN_ALARM_BASE		16
+#define TEMP_ALARM_BASE		24
+#define INTRUSION_ALARM_BASE	30
+#define BEEP_ENABLE_BASE	15
+
+/*
+ * Not currently used:
+ * REG_MAN_ID has the value 0x5ca3 for all supported chips.
+ * REG_CHIP_ID == 0x88/0xa1/0xc1 depending on chip model.
+ * REG_MAN_ID is at port 0x4f
+ * REG_CHIP_ID is at port 0x58
+ */
+
+#endif /* __HWMON_NCT6775_H__ */
-- 
2.35.1