Nuvoton NCT6683D is an eSIO with hardware monitoring capabilities.
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
Documentation/hwmon/nct6683 | 57 ++
drivers/hwmon/Kconfig | 10 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/nct6683.c | 1455 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1523 insertions(+)
create mode 100644 Documentation/hwmon/nct6683
create mode 100644 drivers/hwmon/nct6683.c
diff --git a/Documentation/hwmon/nct6683 b/Documentation/hwmon/nct6683
new file mode 100644
index 0000000..c1301d4
--- /dev/null
+++ b/Documentation/hwmon/nct6683
@@ -0,0 +1,57 @@
+Kernel driver nct6683
+=====================
+
+Supported chips:
+ * Nuvoton NCT6683D
+ Prefix: 'nct6683'
+ Addresses scanned: ISA address retrieved from Super I/O registers
+ Datasheet: Available from Nuvoton upon request
+
+Authors:
+ Guenter Roeck <linux@xxxxxxxxxxxx>
+
+Description
+-----------
+
+This driver implements support for the Nuvoton NCT6683D eSIO chip.
+
+The chips implement up to shared 32 temperature and voltage sensors.
+It supports up to 16 fan rotation sensors and up to 8 fan control engines.
+
+Temperatures are measured in degrees Celsius. Measurement resolution is
+0.5 degrees C.
+
+Voltage sensors (also known as IN sensors) report their values in millivolts.
+
+Fan rotation speeds are reported in RPM (rotations per minute).
+
+Usage Note
+----------
+
+Limit register locations on Intel boards with EC firmware version 1.0
+build date 04/03/13 do not match the register locations in the Nuvoton
+datasheet. Nuvoton confirms that Intel uses a special firmware version
+with different register addresses. The specification describing the Intel
+firmware is held under NDA by Nuvoton and Intel and not available
+to the public.
+
+Some of the register locations can be reverse engineered; others are too
+well hidden. Given this, writing any values from the operating system is
+considered too risky with this firmware and has been disabled. All limits
+must all be written from the BIOS.
+
+The driver has only been tested with the Intel firmware, and by default
+only instantiates on Intel boards. To enable it on non-Intel boards,
+set the 'force' module parameter to 1.
+
+Tested Boards and Firmware Versions
+-----------------------------------
+
+The driver has been reported to work with the following boards and
+firmware versions.
+
+Board Firmware version
+---------------------------------------------------------------
+Intel DH87RL NCT6683D EC firmware version 1.0 build 04/03/13
+Intel DH87MC NCT6683D EC firmware version 1.0 build 04/03/13
+Intel DB85FL NCT6683D EC firmware version 1.0 build 04/03/13
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index b13172c..e4a3c9b 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1073,6 +1073,16 @@ config SENSORS_NTC_THERMISTOR
This driver can also be built as a module. If so, the module
will be called ntc-thermistor.
+config SENSORS_NCT6683
+ tristate "Nuvoton NCT6683D"
+ depends on !PPC
+ help
+ If you say yes here you get support for the hardware monitoring
+ functionality of the Nuvoton NCT6683D eSIO chip.
+
+ This driver can also be built as a module. If so, the module
+ will be called nct6683.
+
config SENSORS_NCT6775
tristate "Nuvoton NCT6775F and compatibles"
depends on !PPC
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 199c401..081b8ab 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -115,6 +115,7 @@ obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
+obj-$(CONFIG_SENSORS_NCT6683) += nct6683.o
obj-$(CONFIG_SENSORS_NCT6775) += nct6775.o
obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
diff --git a/drivers/hwmon/nct6683.c b/drivers/hwmon/nct6683.c
new file mode 100644
index 0000000..bdf8ccf
--- /dev/null
+++ b/drivers/hwmon/nct6683.c
@@ -0,0 +1,1455 @@
+/*
+ * nct6683 - Driver for the hardware monitoring functionality of
+ * Nuvoton NCT6683D eSIO
+ *
+ * Copyright (C) 2013 Guenter Roeck <linux@xxxxxxxxxxxx>
+ *
+ * Derived from nct6775 driver
+ * Copyright (C) 2012, 2013 Guenter Roeck <linux@xxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * Supports the following chips:
+ *
+ * Chip #vin #fan #pwm #temp chip ID
+ * nct6683d 21(1) 16 8 32(1) 0xc730
+ *
+ * Notes:
+ * (1) Total number of vin and temp inputs is 32.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+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");
+
+static const char * const nct6683_device_names[] = {
+ "nct6683",
+};
+
+static const char * const nct6683_chip_names[] = {
+ "NCT6683D",
+};
+
+#define DRVNAME "nct6683"
+
+/*
+ * Super-I/O constants and functions
+ */
+
+#define NCT6683_LD_ACPI 0x0a
+#define NCT6683_LD_HWM 0x0b
+#define NCT6683_LD_VID 0x0d
+
+#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_NCT6681_ID 0xb270 /* for later */
+#define SIO_NCT6683_ID 0xc730
+#define SIO_ID_MASK 0xFFF0
+
+static inline void
+superio_outb(int ioreg, int reg, int val)
+{
+ outb(reg, ioreg);
+ outb(val, ioreg + 1);
+}
+
+static inline int
+superio_inb(int ioreg, int reg)
+{
+ outb(reg, ioreg);
+ return inb(ioreg + 1);
+}
+
+static inline void
+superio_select(int ioreg, int ld)
+{
+ outb(SIO_REG_LDSEL, ioreg);
+ outb(ld, ioreg + 1);
+}
+
+static inline int
+superio_enter(int ioreg)
+{
+ /*
+ * 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 inline void
+superio_exit(int ioreg)
+{
+ outb(0xaa, ioreg);
+ outb(0x02, ioreg);
+ outb(0x02, ioreg + 1);
+ release_region(ioreg, 2);
+}
+
+/*
+ * ISA constants
+ */
+
+#define IOREGION_ALIGNMENT (~7)
+#define IOREGION_OFFSET 4 /* Use EC port 1 */
+#define IOREGION_LENGTH 4
+
+#define EC_PAGE_REG 0
+#define EC_INDEX_REG 1
+#define EC_DATA_REG 2
+#define EC_EVENT_REG 3
+
+/* Common and NCT6683 specific data */
+
+#define NCT6683_NUM_REG_MON 32
+#define NCT6683_NUM_REG_FAN 16
+#define NCT6683_NUM_REG_PWM 8
+
+#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_MON_STS(x) (0x174 + (x))
+#define NCT6683_REG_IDLE(x) (0x178 + (x))
+
+#define NCT6683_REG_FAN_STS(x) (0x17c + (x))
+#define NCT6683_REG_FAN_ERRSTS 0x17e
+#define NCT6683_REG_FAN_INITSTS 0x17f
+
+#define NCT6683_HWM_CFG 0x180
+
+#define NCT6683_REG_MON_CFG(x) (0x1a0 + (x))
+#define NCT6683_REG_FANIN_CFG(x) (0x1c0 + (x))
+#define NCT6683_REG_FANOUT_CFG(x) (0x1d0 + (x))
+
+#define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16)
+#define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16)
+
+#define NCT6683_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */
+#define NCT6683_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */
+#define NCT6683_REG_MON_HIGH(x) (0x370 + (x) * 2) /* 8 bit */
+#define NCT6683_REG_MON_LOW(x) (0x371 + (x) * 2) /* 8 bit */
+
+#define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */
+
+#define NCT6683_REG_CUSTOMER_ID 0x602
+#define NCT6683_CUSTOMER_ID_INTEL 0x805
+
+#define NCT6683_REG_BUILD_YEAR 0x604
+#define NCT6683_REG_BUILD_MONTH 0x605
+#define NCT6683_REG_BUILD_DAY 0x606
+#define NCT6683_REG_SERIAL 0x607
+#define NCT6683_REG_VERSION_HI 0x608
+#define NCT6683_REG_VERSION_LO 0x609
+
+#define NCT6683_REG_CR_CASEOPEN 0xe8
+#define NCT6683_CR_CASEOPEN_MASK (1 << 7)
+
+#define NCT6683_REG_CR_BEEP 0xe0
+#define NCT6683_CR_BEEP_MASK (1 << 6)
+
+static const char *const nct6683_mon_label[] = {
+ NULL, /* disabled */
+ "Local",
+ "Diode 0 (curr)",
+ "Diode 1 (curr)",
+ "Diode 2 (curr)",
+ "Diode 0 (volt)",
+ "Diode 1 (volt)",
+ "Diode 2 (volt)",
+ "Thermistor 14",
+ "Thermistor 15",
+ "Thermistor 16",
+ "Thermistor 0",
+ "Thermistor 1",
+ "Thermistor 2",
+ "Thermistor 3",
+ "Thermistor 4",
+ "Thermistor 5", /* 0x10 */
+ "Thermistor 6",
+ "Thermistor 7",
+ "Thermistor 8",
+ "Thermistor 9",
+ "Thermistor 10",
+ "Thermistor 11",
+ "Thermistor 12",
+ "Thermistor 13",
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ "PECI 0.0", /* 0x20 */
+ "PECI 1.0",
+ "PECI 2.0",
+ "PECI 3.0",
+ "PECI 0.1",
+ "PECI 1.1",
+ "PECI 2.1",
+ "PECI 3.1",
+ "PECI DIMM 0",
+ "PECI DIMM 1",
+ "PECI DIMM 2",
+ "PECI DIMM 3",
+ NULL, NULL, NULL, NULL,
+ "PCH CPU", /* 0x30 */
+ "PCH CHIP",
+ "PCH CHIP CPU MAX",
+ "PCH MCH",
+ "PCH DIMM 0",
+ "PCH DIMM 1",
+ "PCH DIMM 2",
+ "PCH DIMM 3",
+ "SMBus 0",
+ "SMBus 1",
+ "SMBus 2",
+ "SMBus 3",
+ "SMBus 4",
+ "SMBus 5",
+ "DIMM 0",
+ "DIMM 1",
+ "DIMM 2", /* 0x40 */
+ "DIMM 3",
+ "AMD TSI Addr 90h",
+ "AMD TSI Addr 92h",
+ "AMD TSI Addr 94h",
+ "AMD TSI Addr 96h",
+ "AMD TSI Addr 98h",
+ "AMD TSI Addr 9ah",
+ "AMD TSI Addr 9ch",
+ "AMD TSI Addr 9dh",
+ NULL, NULL, NULL, NULL, NULL, NULL,
+ "Virtual 0", /* 0x50 */
+ "Virtual 1",
+ "Virtual 2",
+ "Virtual 3",
+ "Virtual 4",
+ "Virtual 5",
+ "Virtual 6",
+ "Virtual 7",
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ "VCC", /* 0x60 voltage sensors */
+ "VSB",
+ "AVSB",
+ "VTT",
+ "VBAT",
+ "VREF",
+ "VIN0",
+ "VIN1",
+ "VIN2",
+ "VIN3",
+ "VIN4",
+ "VIN5",
+ "VIN6",
+ "VIN7",
+ "VIN8",
+ "VIN9",
+ "VIN10",
+ "VIN11",
+ "VIN12",
+ "VIN13",
+ "VIN14",
+ "VIN15",
+ "VIN16",
+};
+
+#define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
+#define MON_VOLTAGE_START 0x60
+
+/* ------------------------------------------------------- */
+
+struct nct6683_data {
+ int addr; /* IO base of EC space */
+ int sioreg; /* SIO register */
+ enum kinds kind;
+ u16 customer_id;
+
+ struct device *hwmon_dev;
+ const struct attribute_group *groups[6];
+
+ int temp_num; /* number of temperature attributes */
+ u8 temp_index[NCT6683_NUM_REG_MON];
+ u8 temp_src[NCT6683_NUM_REG_MON];
+
+ u8 in_num; /* number of voltage attributes */
+ u8 in_index[NCT6683_NUM_REG_MON];
+ u8 in_src[NCT6683_NUM_REG_MON];
+
+ struct mutex update_lock; /* used to protect sensor updates */
+ bool valid; /* true if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ /* Voltage attribute values */
+ u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
+
+ /* Temperature attribute values */
+ s16 temp_in[NCT6683_NUM_REG_MON];
+ s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
+ * [3]=crit
+ */
+
+ /* Fan attribute values */
+ unsigned int rpm[NCT6683_NUM_REG_FAN];
+ u16 fan_min[NCT6683_NUM_REG_FAN];
+ u8 fanin_cfg[NCT6683_NUM_REG_FAN];
+ u8 fanout_cfg[NCT6683_NUM_REG_FAN];
+ u16 have_fan; /* some fan inputs can be disabled */
+
+ u8 have_pwm;
+ u8 pwm[NCT6683_NUM_REG_PWM];
+
+#ifdef CONFIG_PM
+ /* Remember extra register values over suspend/resume */
+ u8 hwm_cfg;
+#endif
+};
+
+struct nct6683_sio_data {
+ int sioreg;
+ enum kinds kind;
+};
+
+struct sensor_device_template {
+ struct device_attribute dev_attr;
+ union {
+ struct {
+ u8 nr;
+ u8 index;
+ } s;
+ int index;
+ } u;
+ bool s2; /* true if both index and nr are used */
+};
+
+struct sensor_device_attr_u {
+ union {
+ struct sensor_device_attribute a1;
+ struct sensor_device_attribute_2 a2;
+ } u;
+ char name[32];
+};
+
+#define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
+ .attr = {.name = _template, .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+}
+
+#define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
+ { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
+ .u.index = _index, \
+ .s2 = false }
+
+#define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
+ _nr, _index) \
+ { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
+ .u.s.index = _index, \
+ .u.s.nr = _nr, \
+ .s2 = true }
+
+#define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
+static struct sensor_device_template sensor_dev_template_##_name \
+ = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
+ _index)
+
+#define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
+ _nr, _index) \
+static struct sensor_device_template sensor_dev_template_##_name \
+ = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
+ _nr, _index)
+
+struct sensor_template_group {
+ struct sensor_device_template **templates;
+ umode_t (*is_visible)(struct kobject *, struct attribute *, int);
+ int base;
+};
+
+static struct attribute_group *
+nct6683_create_attr_group(struct device *dev, struct sensor_template_group *tg,
+ int repeat)
+{
+ struct sensor_device_attribute_2 *a2;
+ struct sensor_device_attribute *a;
+ struct sensor_device_template **t;
+ struct sensor_device_attr_u *su;
+ struct attribute_group *group;
+ struct attribute **attrs;
+ int i, j, count;
+
+ if (repeat <= 0)
+ return ERR_PTR(-EINVAL);
+
+ t = tg->templates;
+ for (count = 0; *t; t++, count++)
+ ;
+
+ if (count == 0)
+ return ERR_PTR(-EINVAL);
+
+ group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
+ if (group == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ attrs = devm_kzalloc(dev, sizeof(*attrs) * (repeat * count + 1),
+ GFP_KERNEL);
+ if (attrs == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ su = devm_kzalloc(dev, sizeof(*su) * repeat * count,
+ GFP_KERNEL);
+ if (su == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ group->attrs = attrs;
+ group->is_visible = tg->is_visible;
+
+ for (i = 0; i < repeat; i++) {
+ t = tg->templates;
+ for (j = 0; *t != NULL; j++) {
+ snprintf(su->name, sizeof(su->name),
+ (*t)->dev_attr.attr.name, tg->base + i);
+ if ((*t)->s2) {
+ a2 = &su->u.a2;
+ a2->dev_attr.attr.name = su->name;
+ a2->nr = (*t)->u.s.nr + i;
+ a2->index = (*t)->u.s.index;
+ a2->dev_attr.attr.mode =
+ (*t)->dev_attr.attr.mode;
+ a2->dev_attr.show = (*t)->dev_attr.show;
+ a2->dev_attr.store = (*t)->dev_attr.store;
+ *attrs = &a2->dev_attr.attr;
+ } else {
+ a = &su->u.a1;
+ a->dev_attr.attr.name = su->name;
+ a->index = (*t)->u.index + i;
+ a->dev_attr.attr.mode =
+ (*t)->dev_attr.attr.mode;
+ a->dev_attr.show = (*t)->dev_attr.show;
+ a->dev_attr.store = (*t)->dev_attr.store;
+ *attrs = &a->dev_attr.attr;
+ }
+ attrs++;
+ su++;
+ t++;
+ }
+ }
+
+ return group;
+}
+
+/* LSB is 16 mV, except for the following sources, where it is 32 mV */
+#define MON_SRC_VCC 0x60
+#define MON_SRC_VSB 0x61
+#define MON_SRC_AVSB 0x62
+#define MON_SRC_VBAT 0x64
+
+static inline long in_from_reg(u16 reg, u8 src)
+{
+ int scale = 16;
+
+ if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
+ src == MON_SRC_VBAT)
+ scale <<= 1;
+ return reg * scale;
+}
+
+static inline u16 in_to_reg(u32 val, u8 src)
+{
+ int scale = 16;
+
+ if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
+ src == MON_SRC_VBAT)
+ scale <<= 1;
+
+ return clamp_val(DIV_ROUND_CLOSEST(val, scale), 0, 127);
+}
+
+static u16 nct6683_read(struct nct6683_data *data, u16 reg)
+{
+ int res;
+
+ outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
+ outb_p(reg >> 8, data->addr + EC_PAGE_REG);
+ outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
+ res = inb_p(data->addr + EC_DATA_REG);
+ return res;
+}
+
+static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
+{
+ return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
+}
+
+static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value)
+{
+ outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
+ outb_p(reg >> 8, data->addr + EC_PAGE_REG);
+ outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
+ outb_p(value & 0xff, data->addr + EC_DATA_REG);
+}
+
+static int get_in_reg(struct nct6683_data *data, int nr, int index)
+{
+ int ch = data->in_index[index];
+ int reg = -EINVAL;
+
+ switch (nr) {
+ case 0:
+ reg = NCT6683_REG_MON(ch);
+ break;
+ case 1:
+ if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
+ reg = NCT6683_REG_MON_LOW(ch);
+ break;
+ case 2:
+ if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
+ reg = NCT6683_REG_MON_HIGH(ch);
+ break;
+ default:
+ break;
+ }
+ return reg;
+}
+
+static int get_temp_reg(struct nct6683_data *data, int nr, int index)
+{
+ int ch = data->temp_index[index];
+ int reg = -EINVAL;
+
+ switch (data->customer_id) {
+ case NCT6683_CUSTOMER_ID_INTEL:
+ switch (nr) {
+ default:
+ case 1: /* max */
+ reg = NCT6683_REG_INTEL_TEMP_MAX(ch);
+ break;
+ case 3: /* crit */
+ reg = NCT6683_REG_INTEL_TEMP_CRIT(ch);
+ break;
+ }
+ break;
+ default:
+ switch (nr) {
+ default:
+ case 0: /* min */
+ reg = NCT6683_REG_MON_LOW(ch);
+ break;
+ case 1: /* max */
+ reg = NCT6683_REG_TEMP_MAX(ch);
+ break;
+ case 2: /* hyst */
+ reg = NCT6683_REG_TEMP_HYST(ch);
+ break;
+ case 3: /* crit */
+ reg = NCT6683_REG_MON_HIGH(ch);
+ break;
+ }
+ break;
+ }
+ return reg;
+}
+
+static void nct6683_update_pwm(struct device *dev)
+{
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
+ if (!(data->have_pwm & (1 << i)))
+ continue;
+ data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
+ }
+}
+
+static struct nct6683_data *nct6683_update_device(struct device *dev)
+{
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int i, j;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ /* Measured voltages and limits */
+ for (i = 0; i < data->in_num; i++) {
+ for (j = 0; j < 3; j++) {
+ int reg = get_in_reg(data, j, i);
+
+ if (reg >= 0)
+ data->in[j][i] =
+ nct6683_read(data, reg);
+ }
+ }
+
+ /* Measured temperatures and limits */
+ for (i = 0; i < data->temp_num; i++) {
+ u8 ch = data->temp_index[i];
+
+ data->temp_in[i] = nct6683_read16(data,
+ NCT6683_REG_MON(ch));
+ for (j = 0; j < 4; j++) {
+ int reg = get_temp_reg(data, j, i);
+
+ if (reg >= 0)
+ data->temp[j][i] =
+ nct6683_read(data, reg);
+ }
+ }
+
+ /* Measured fan speeds and limits */
+ for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
+ if (!(data->have_fan & (1 << i)))
+ continue;
+
+ data->rpm[i] = nct6683_read16(data,
+ NCT6683_REG_FAN_RPM(i));
+ data->fan_min[i] = nct6683_read16(data,
+ NCT6683_REG_FAN_MIN(i));
+ }
+
+ nct6683_update_pwm(dev);
+
+ data->last_updated = jiffies;
+ data->valid = true;
+ }
+
+ mutex_unlock(&data->update_lock);
+ return data;
+}
+
+/*
+ * Sysfs callback functions
+ */
+static ssize_t
+show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+ int nr = sattr->index;
+
+ return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
+}
+
+static ssize_t
+show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+ int index = sattr->index;
+ int nr = sattr->nr;
+
+ return sprintf(buf, "%ld\n",
+ in_from_reg(data->in[index][nr], data->in_index[index]));
+}
+
+static umode_t nct6683_in_is_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int nr = index % 4; /* attribute */
+
+ /*
+ * Voltage limits exist for Intel boards,
+ * but register location and encoding is unknown
+ */
+ if ((nr == 2 || nr == 3) &&
+ data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
+ return 0;
+
+ return attr->mode;
+}
+
+SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
+SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
+SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
+SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
+
+static struct sensor_device_template *nct6683_attributes_in_template[] = {
+ &sensor_dev_template_in_label,
+ &sensor_dev_template_in_input,
+ &sensor_dev_template_in_min,
+ &sensor_dev_template_in_max,
+ NULL
+};
+
+static struct sensor_template_group nct6683_in_template_group = {
+ .templates = nct6683_attributes_in_template,
+ .is_visible = nct6683_in_is_visible,
+};
+
+static ssize_t
+show_fan(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+
+ return sprintf(buf, "%d\n", data->rpm[sattr->index]);
+}
+
+static ssize_t
+show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct nct6683_data *data = nct6683_update_device(dev);
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ int nr = sattr->index;
+
+ return sprintf(buf, "%d\n", data->fan_min[nr]);
+}
+
+static ssize_t
+show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+
+ return sprintf(buf, "%d\n",
+ ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
+}
+
+static umode_t nct6683_fan_is_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int fan = index / 3; /* fan index */
+ int nr = index % 3; /* attribute index */
+
+ if (!(data->have_fan & (1 << fan)))
+ return 0;
+
+ /*
+ * Intel may have minimum fan speed limits,
+ * but register location and encoding are unknown.
+ */
+ if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
+ return 0;
+
+ return attr->mode;
+}
+
+SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
+SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
+SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
+
+/*
+ * nct6683_fan_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 sensor_device_template *nct6683_attributes_fan_template[] = {
+ &sensor_dev_template_fan_input,
+ &sensor_dev_template_fan_pulses,
+ &sensor_dev_template_fan_min,
+ NULL
+};
+
+static struct sensor_template_group nct6683_fan_template_group = {
+ .templates = nct6683_attributes_fan_template,
+ .is_visible = nct6683_fan_is_visible,
+ .base = 1,
+};
+
+static ssize_t
+show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+ int nr = sattr->index;
+
+ return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
+}
+
+static ssize_t
+show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+ int index = sattr->index;
+ int nr = sattr->nr;
+
+ return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
+}
+
+static ssize_t
+show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+ int nr = sattr->index;
+ int temp = data->temp[1][nr] - data->temp[2][nr];
+
+ return sprintf(buf, "%d\n", temp * 1000);
+}
+
+static ssize_t
+show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ struct nct6683_data *data = nct6683_update_device(dev);
+ int index = sattr->index;
+
+ return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
+}
+
+/*
+ * Temperature sensor type is determined by temperature source
+ * and can not be modified.
+ * 0x02..0x07: Thermal diode
+ * 0x08..0x18: Thermistor
+ * 0x20..0x2b: Intel PECI
+ * 0x42..0x49: AMD TSI
+ * Others are unspecified (not visible)
+ */
+
+static int get_temp_type(u8 src)
+{
+ if (src >= 0x02 && src <= 0x07)
+ return 3; /* thermal diode */
+ else if (src >= 0x08 && src <= 0x18)
+ return 4; /* thermistor */
+ else if (src >= 0x20 && src <= 0x2b)
+ return 6; /* PECI */
+ else if (src >= 0x42 && src <= 0x49)
+ return 5;
+
+ return 0;
+}
+
+static ssize_t
+show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct nct6683_data *data = nct6683_update_device(dev);
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ int nr = sattr->index;
+ return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
+}
+
+static umode_t nct6683_temp_is_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int temp = index / 7; /* temp index */
+ int nr = index % 7; /* attribute index */
+
+ /*
+ * Intel does not have low temperature limits or temperature hysteresis
+ * registers, or at least register location and encoding is unknown.
+ */
+ if ((nr == 2 || nr == 4) &&
+ data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
+ return 0;
+
+ if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
+ return 0; /* type */
+
+ return attr->mode;
+}
+
+SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
+SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
+SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
+SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
+SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
+ 0);
+SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
+SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
+
+/*
+ * nct6683_temp_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 sensor_device_template *nct6683_attributes_temp_template[] = {
+ &sensor_dev_template_temp_input,
+ &sensor_dev_template_temp_label,
+ &sensor_dev_template_temp_min, /* 2 */
+ &sensor_dev_template_temp_max, /* 3 */
+ &sensor_dev_template_temp_max_hyst, /* 4 */
+ &sensor_dev_template_temp_crit, /* 5 */
+ &sensor_dev_template_temp_type, /* 6 */
+ NULL
+};
+
+static struct sensor_template_group nct6683_temp_template_group = {
+ .templates = nct6683_attributes_temp_template,
+ .is_visible = nct6683_temp_is_visible,
+ .base = 1,
+};
+
+static ssize_t
+show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct nct6683_data *data = nct6683_update_device(dev);
+ struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+ int index = sattr->index;
+
+ return sprintf(buf, "%d\n", data->pwm[index]);
+}
+
+SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, 0, 0);
+
+static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int pwm = index; /* pwm index */
+
+ if (!(data->have_pwm & (1 << pwm)))
+ return 0;
+
+ return attr->mode;
+}
+
+static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
+ &sensor_dev_template_pwm,
+ NULL
+};
+
+static struct sensor_template_group nct6683_pwm_template_group = {
+ .templates = nct6683_attributes_pwm_template,
+ .is_visible = nct6683_pwm_is_visible,
+ .base = 1,
+};
+
+static ssize_t
+show_global_beep(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int ret;
+ u8 reg;
+
+ mutex_lock(&data->update_lock);
+
+ ret = superio_enter(data->sioreg);
+ if (ret)
+ goto error;
+ superio_select(data->sioreg, NCT6683_LD_HWM);
+ reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
+ superio_exit(data->sioreg);
+
+ mutex_unlock(&data->update_lock);
+
+ return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
+
+error:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static ssize_t
+store_global_beep(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ u8 reg;
+ int ret;
+
+ if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+
+ ret = superio_enter(data->sioreg);
+ if (ret) {
+ count = ret;
+ goto error;
+ }
+
+ superio_select(data->sioreg, NCT6683_LD_HWM);
+ reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
+ if (val)
+ reg |= NCT6683_CR_BEEP_MASK;
+ else
+ reg &= ~NCT6683_CR_BEEP_MASK;
+ superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
+ superio_exit(data->sioreg);
+error:
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+/* Case open detection */
+
+static ssize_t
+show_caseopen(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ int ret;
+ u8 reg;
+
+ mutex_lock(&data->update_lock);
+
+ ret = superio_enter(data->sioreg);
+ if (ret)
+ goto error;
+ superio_select(data->sioreg, NCT6683_LD_ACPI);
+ reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
+ superio_exit(data->sioreg);
+
+ mutex_unlock(&data->update_lock);
+
+ return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
+
+error:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static ssize_t
+clear_caseopen(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct nct6683_data *data = dev_get_drvdata(dev);
+ 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.
+ * Caseopen is activ low, clear by writing 1 into the register.
+ */
+
+ ret = superio_enter(data->sioreg);
+ if (ret) {
+ count = ret;
+ goto error;
+ }
+
+ superio_select(data->sioreg, NCT6683_LD_ACPI);
+ reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
+ reg |= NCT6683_CR_CASEOPEN_MASK;
+ superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
+ reg &= ~NCT6683_CR_CASEOPEN_MASK;
+ superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
+ superio_exit(data->sioreg);
+
+ data->valid = false; /* Force cache refresh */
+error:
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static DEVICE_ATTR(intrusion0_alarm, S_IWUSR | S_IRUGO, show_caseopen,
+ clear_caseopen);
+static DEVICE_ATTR(beep_enable, S_IWUSR | S_IRUGO, show_global_beep,
+ store_global_beep);
+
+static struct attribute *nct6683_attributes_other[] = {
+ &dev_attr_intrusion0_alarm.attr,
+ &dev_attr_beep_enable.attr,
+ NULL
+};
+
+static const struct attribute_group nct6683_group_other = {
+ .attrs = nct6683_attributes_other,
+};
+
+/* Get the monitoring functions started */
+static inline void nct6683_init_device(struct nct6683_data *data)
+{
+ u8 tmp;
+
+ /* Start hardware monitoring if needed */
+ tmp = nct6683_read(data, NCT6683_HWM_CFG);
+ if (!(tmp & 0x80))
+ nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
+}
+
+/*
+ * There are a total of 24 fan inputs. Each can be configured as input
+ * or as output. A maximum of 16 inputs and 8 outputs is configurable.
+ */
+static void
+nct6683_setup_fans(struct nct6683_data *data)
+{
+ int i;
+ u8 reg;
+
+ for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
+ reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
+ if (reg & 0x80)
+ data->have_fan |= 1 << i;
+ data->fanin_cfg[i] = reg;
+ }
+ for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
+ reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
+ if (reg & 0x80)
+ data->have_pwm |= 1 << i;
+ data->fanout_cfg[i] = reg;
+ }
+}
+
+/*
+ * Translation from monitoring register to temperature and voltage attributes
+ * ==========================================================================
+ *
+ * There are a total of 32 monitoring registers. Each can be assigned to either
+ * a temperature or voltage monitoring source.
+ * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
+ *
+ * Temperature and voltage attribute mapping is determined by walking through
+ * the NCT6683_REG_MON_CFG registers. If the assigned source is
+ * a temperature, temp_index[n] is set to the monitor register index, and
+ * temp_src[n] is set to the temperature source. If the assigned source is
+ * a voltage, the respective values are stored in in_index[] and in_src[],
+ * respectively.
+ */
+
+static void nct6683_setup_sensors(struct nct6683_data *data)
+{
+ u8 reg;
+ int i;
+
+ data->temp_num = 0;
+ data->in_num = 0;
+ for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
+ reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
+ /* Ignore invalid assignments */
+ if (reg >= NUM_MON_LABELS)
+ continue;
+ /* Skip if disabled or reserved */
+ if (nct6683_mon_label[reg] == NULL)
+ continue;
+ if (reg < MON_VOLTAGE_START) {
+ data->temp_index[data->temp_num] = i;
+ data->temp_src[data->temp_num] = reg;
+ data->temp_num++;
+ } else {
+ data->in_index[data->in_num] = i;
+ data->in_src[data->in_num] = reg;
+ data->in_num++;
+ }
+ }
+}
+
+static int nct6683_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct nct6683_sio_data *sio_data = dev->platform_data;
+ struct attribute_group *group;
+ struct nct6683_data *data;
+ struct device *hwmon_dev;
+ struct resource *res;
+ int groups = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
+ return -EBUSY;
+
+ data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->kind = sio_data->kind;
+ data->sioreg = sio_data->sioreg;
+ data->addr = res->start;
+ mutex_init(&data->update_lock);
+ platform_set_drvdata(pdev, data);
+
+ data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
+
+ nct6683_init_device(data);
+ nct6683_setup_fans(data);
+ nct6683_setup_sensors(data);
+
+ /* Register sysfs hooks */
+
+ if (data->have_pwm) {
+ group = nct6683_create_attr_group(dev,
+ &nct6683_pwm_template_group,
+ fls(data->have_pwm));
+ if (IS_ERR(group))
+ return PTR_ERR(group);
+ data->groups[groups++] = group;
+ }
+
+ if (data->in_num) {
+ group = nct6683_create_attr_group(dev,
+ &nct6683_in_template_group,
+ data->in_num);
+ if (IS_ERR(group))
+ return PTR_ERR(group);
+ data->groups[groups++] = group;
+ }
+
+ if (data->have_fan) {
+ group = nct6683_create_attr_group(dev,
+ &nct6683_fan_template_group,
+ fls(data->have_fan));
+ if (IS_ERR(group))
+ return PTR_ERR(group);
+ data->groups[groups++] = group;
+ }
+
+ if (data->temp_num) {
+ group = nct6683_create_attr_group(dev,
+ &nct6683_temp_template_group,
+ data->temp_num);
+ if (IS_ERR(group))
+ return PTR_ERR(group);
+ data->groups[groups++] = group;
+ }
+ data->groups[groups++] = &nct6683_group_other;
+
+ dev_info(dev, "%s EC firmware version %d.%d build %02x/%02x/%02x\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));
+
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev,
+ nct6683_device_names[data->kind], data, data->groups);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+#ifdef CONFIG_PM
+static int nct6683_suspend(struct device *dev)
+{
+ struct nct6683_data *data = nct6683_update_device(dev);
+
+ mutex_lock(&data->update_lock);
+ data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG);
+ mutex_unlock(&data->update_lock);
+
+ return 0;
+}
+
+static int nct6683_resume(struct device *dev)
+{
+ struct nct6683_data *data = dev_get_drvdata(dev);
+
+ mutex_lock(&data->update_lock);
+
+ nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg);
+
+ /* Force re-reading all values */
+ data->valid = false;
+ mutex_unlock(&data->update_lock);
+
+ return 0;
+}
+
+static const struct dev_pm_ops nct6683_dev_pm_ops = {
+ .suspend = nct6683_suspend,
+ .resume = nct6683_resume,
+ .freeze = nct6683_suspend,
+ .restore = nct6683_resume,
+};
+
+#define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops)
+#else
+#define NCT6683_DEV_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+static struct platform_driver nct6683_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRVNAME,
+ .pm = NCT6683_DEV_PM_OPS,
+ },
+ .probe = nct6683_probe,
+};
+
+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;
+
+ val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
+ | superio_inb(sioaddr, SIO_REG_DEVID + 1);
+
+ switch (val & SIO_ID_MASK) {
+ case SIO_NCT6683_ID:
+ sio_data->kind = nct6683;
+ break;
+ default:
+ if (val != 0xffff)
+ pr_debug("unsupported chip ID: 0x%04x\n", val);
+ goto fail;
+ }
+
+ /* We have a known chip, find the HWM I/O address */
+ superio_select(sioaddr, NCT6683_LD_HWM);
+ val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
+ | superio_inb(sioaddr, SIO_REG_ADDR + 1);
+ addr = val & IOREGION_ALIGNMENT;
+ if (addr == 0) {
+ pr_err("EC base I/O port unconfigured\n");
+ goto fail;
+ }
+
+ /* Activate logical device if needed */
+ val = superio_inb(sioaddr, SIO_REG_ENABLE);
+ if (!(val & 0x01)) {
+ pr_err("EC is disabled\n");
+ goto fail;
+ }
+
+ superio_exit(sioaddr);
+ pr_info("Found %s or compatible chip at %#x:%#x\n",
+ nct6683_chip_names[sio_data->kind], sioaddr, addr);
+ sio_data->sioreg = sioaddr;
+
+ return addr;
+
+fail:
+ superio_exit(sioaddr);
+ return -ENODEV;
+}
+
+/*
+ * 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 nct6683 driver. But since we use platform_device_alloc(), we
+ * must keep track of the device
+ */
+static struct platform_device *pdev[2];
+
+static int __init sensors_nct6683_init(void)
+{
+ struct nct6683_sio_data sio_data;
+ int sioaddr[2] = { 0x2e, 0x4e };
+ struct resource res;
+ bool found = false;
+ int address;
+ int i, err;
+
+ err = platform_driver_register(&nct6683_driver);
+ if (err)
+ return err;
+
+ /*
+ * 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
+ * nct6683 hardware monitor, and call probe()
+ */
+ for (i = 0; i < ARRAY_SIZE(pdev); i++) {
+ address = nct6683_find(sioaddr[i], &sio_data);
+ if (address <= 0)
+ continue;
+
+ found = true;
+
+ pdev[i] = platform_device_alloc(DRVNAME, address);
+ if (!pdev[i]) {
+ err = -ENOMEM;
+ goto exit_device_put;
+ }
+
+ err = platform_device_add_data(pdev[i], &sio_data,
+ sizeof(struct nct6683_sio_data));
+ if (err)
+ goto exit_device_put;
+
+ 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:
+ for (i = 0; i < ARRAY_SIZE(pdev); i++) {
+ if (pdev[i])
+ platform_device_put(pdev[i]);
+ }
+exit_unregister:
+ platform_driver_unregister(&nct6683_driver);
+ return err;
+}
+
+static void __exit sensors_nct6683_exit(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pdev); i++) {
+ if (pdev[i])
+ platform_device_unregister(pdev[i]);
+ }
+ platform_driver_unregister(&nct6683_driver);
+}
+
+MODULE_AUTHOR("Guenter Roeck <linux@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("NCT6683D driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_nct6683_init);
+module_exit(sensors_nct6683_exit);
--
1.7.9.7
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