Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 894 insertions, 0 deletions

diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
new file mode 100644
index 000000000000..3494a4cce414
--- /dev/null
+++ b/drivers/hwmon/sch5627.c
@@ -0,0 +1,894 @@
+/***************************************************************************
+ *   Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com>           *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#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/err.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+
+#define DRVNAME "sch5627"
+#define DEVNAME DRVNAME /* We only support one model */
+
+#define SIO_SCH5627_EM_LD       0x0C    /* Embedded Microcontroller LD */
+#define SIO_UNLOCK_KEY          0x55    /* Key to enable Super-I/O */
+#define SIO_LOCK_KEY            0xAA    /* Key to disable Super-I/O */
+
+#define SIO_REG_LDSEL           0x07    /* Logical device select */
+#define SIO_REG_DEVID           0x20    /* Device ID */
+#define SIO_REG_ENABLE          0x30    /* Logical device enable */
+#define SIO_REG_ADDR            0x66    /* Logical device address (2 bytes) */
+
+#define SIO_SCH5627_ID          0xC6    /* Chipset ID */
+
+#define REGION_LENGTH           9
+
+#define SCH5627_HWMON_ID                0xa5
+#define SCH5627_COMPANY_ID              0x5c
+#define SCH5627_PRIMARY_ID              0xa0
+
+#define SCH5627_CMD_READ                0x02
+#define SCH5627_CMD_WRITE               0x03
+
+#define SCH5627_REG_BUILD_CODE          0x39
+#define SCH5627_REG_BUILD_ID            0x3a
+#define SCH5627_REG_HWMON_ID            0x3c
+#define SCH5627_REG_HWMON_REV           0x3d
+#define SCH5627_REG_COMPANY_ID          0x3e
+#define SCH5627_REG_PRIMARY_ID          0x3f
+#define SCH5627_REG_CTRL                0x40
+
+#define SCH5627_NO_TEMPS                8
+#define SCH5627_NO_FANS                 4
+#define SCH5627_NO_IN                   5
+
+static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
+        0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
+static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
+        0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
+static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
+        0, 0, 1, 1, 0, 0, 0, 1 };
+static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
+        0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
+static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
+        0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
+
+static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
+        0x2C, 0x2E, 0x30, 0x32 };
+static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
+        0x62, 0x64, 0x66, 0x68 };
+
+static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
+        0x22, 0x23, 0x24, 0x25, 0x189 };
+static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
+        0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
+static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
+        1, 0, 1, 0, 1 };
+static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
+        10745, 3660, 9765, 10745, 3660 };
+static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
+        "VCC", "VTT", "VBAT", "VTR", "V_IN" };
+
+struct sch5627_data {
+        unsigned short addr;
+        struct device *hwmon_dev;
+        u8 control;
+        u8 temp_max[SCH5627_NO_TEMPS];
+        u8 temp_crit[SCH5627_NO_TEMPS];
+        u16 fan_min[SCH5627_NO_FANS];
+
+        struct mutex update_lock;
+        unsigned long last_battery;     /* In jiffies */
+        char valid;                     /* !=0 if following fields are valid */
+        unsigned long last_updated;     /* In jiffies */
+        u16 temp[SCH5627_NO_TEMPS];
+        u16 fan[SCH5627_NO_FANS];
+        u16 in[SCH5627_NO_IN];
+};
+
+static struct platform_device *sch5627_pdev;
+
+/* Super I/O functions */
+static inline int superio_inb(int base, int reg)
+{
+        outb(reg, base);
+        return inb(base + 1);
+}
+
+static inline int superio_enter(int base)
+{
+        /* Don't step on other drivers' I/O space by accident */
+        if (!request_muxed_region(base, 2, DRVNAME)) {
+                pr_err("I/O address 0x%04x already in use\n", base);
+                return -EBUSY;
+        }
+
+        outb(SIO_UNLOCK_KEY, base);
+
+        return 0;
+}
+
+static inline void superio_select(int base, int ld)
+{
+        outb(SIO_REG_LDSEL, base);
+        outb(ld, base + 1);
+}
+
+static inline void superio_exit(int base)
+{
+        outb(SIO_LOCK_KEY, base);
+        release_region(base, 2);
+}
+
+static int sch5627_send_cmd(struct sch5627_data *data, u8 cmd, u16 reg, u8 v)
+{
+        u8 val;
+        int i;
+        /*
+         * According to SMSC for the commands we use the maximum time for
+         * the EM to respond is 15 ms, but testing shows in practice it
+         * responds within 15-32 reads, so we first busy poll, and if
+         * that fails sleep a bit and try again until we are way past
+         * the 15 ms maximum response time.
+         */
+        const int max_busy_polls = 64;
+        const int max_lazy_polls = 32;
+
+        /* (Optional) Write-Clear the EC to Host Mailbox Register */
+        val = inb(data->addr + 1);
+        outb(val, data->addr + 1);
+
+        /* Set Mailbox Address Pointer to first location in Region 1 */
+        outb(0x00, data->addr + 2);
+        outb(0x80, data->addr + 3);
+
+        /* Write Request Packet Header */
+        outb(cmd, data->addr + 4); /* VREG Access Type read:0x02 write:0x03 */
+        outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */
+        outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */
+
+        /* Write Value field */
+        if (cmd == SCH5627_CMD_WRITE)
+                outb(v, data->addr + 4);
+
+        /* Write Address field */
+        outb(reg & 0xff, data->addr + 6);
+        outb(reg >> 8, data->addr + 7);
+
+        /* Execute the Random Access Command */
+        outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */
+
+        /* EM Interface Polling "Algorithm" */
+        for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
+                if (i >= max_busy_polls)
+                        msleep(1);
+                /* Read Interrupt source Register */
+                val = inb(data->addr + 8);
+                /* Write Clear the interrupt source bits */
+                if (val)
+                        outb(val, data->addr + 8);
+                /* Command Completed ? */
+                if (val & 0x01)
+                        break;
+        }
+        if (i == max_busy_polls + max_lazy_polls) {
+                pr_err("Max retries exceeded reading virtual "
+                       "register 0x%04hx (%d)\n", reg, 1);
+                return -EIO;
+        }
+
+        /*
+         * According to SMSC we may need to retry this, but sofar I've always
+         * seen this succeed in 1 try.
+         */
+        for (i = 0; i < max_busy_polls; i++) {
+                /* Read EC-to-Host Register */
+                val = inb(data->addr + 1);
+                /* Command Completed ? */
+                if (val == 0x01)
+                        break;
+
+                if (i == 0)
+                        pr_warn("EC reports: 0x%02x reading virtual register "
+                                "0x%04hx\n", (unsigned int)val, reg);
+        }
+        if (i == max_busy_polls) {
+                pr_err("Max retries exceeded reading virtual "
+                       "register 0x%04hx (%d)\n", reg, 2);
+                return -EIO;
+        }
+
+        /*
+         * According to the SMSC app note we should now do:
+         *
+         * Set Mailbox Address Pointer to first location in Region 1 *
+         * outb(0x00, data->addr + 2);
+         * outb(0x80, data->addr + 3);
+         *
+         * But if we do that things don't work, so let's not.
+         */
+
+        /* Read Value field */
+        if (cmd == SCH5627_CMD_READ)
+                return inb(data->addr + 4);
+
+        return 0;
+}
+
+static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
+{
+        return sch5627_send_cmd(data, SCH5627_CMD_READ, reg, 0);
+}
+
+static int sch5627_write_virtual_reg(struct sch5627_data *data,
+                                     u16 reg, u8 val)
+{
+        return sch5627_send_cmd(data, SCH5627_CMD_WRITE, reg, val);
+}
+
+static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
+{
+        int lsb, msb;
+
+        /* Read LSB first, this will cause the matching MSB to be latched */
+        lsb = sch5627_read_virtual_reg(data, reg);
+        if (lsb < 0)
+                return lsb;
+
+        msb = sch5627_read_virtual_reg(data, reg + 1);
+        if (msb < 0)
+                return msb;
+
+        return lsb | (msb << 8);
+}
+
+static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg,
+                                      u16 lsn_reg, int high_nibble)
+{
+        int msb, lsn;
+
+        /* Read MSB first, this will cause the matching LSN to be latched */
+        msb = sch5627_read_virtual_reg(data, msb_reg);
+        if (msb < 0)
+                return msb;
+
+        lsn = sch5627_read_virtual_reg(data, lsn_reg);
+        if (lsn < 0)
+                return lsn;
+
+        if (high_nibble)
+                return (msb << 4) | (lsn >> 4);
+        else
+                return (msb << 4) | (lsn & 0x0f);
+}
+
+static struct sch5627_data *sch5627_update_device(struct device *dev)
+{
+        struct sch5627_data *data = dev_get_drvdata(dev);
+        struct sch5627_data *ret = data;
+        int i, val;
+
+        mutex_lock(&data->update_lock);
+
+        /* Trigger a Vbat voltage measurement every 5 minutes */
+        if (time_after(jiffies, data->last_battery + 300 * HZ)) {
+                sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
+                                          data->control | 0x10);
+                data->last_battery = jiffies;
+        }
+
+        /* Cache the values for 1 second */
+        if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+                for (i = 0; i < SCH5627_NO_TEMPS; i++) {
+                        val = sch5627_read_virtual_reg12(data,
+                                SCH5627_REG_TEMP_MSB[i],
+                                SCH5627_REG_TEMP_LSN[i],
+                                SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
+                        if (unlikely(val < 0)) {
+                                ret = ERR_PTR(val);
+                                goto abort;
+                        }
+                        data->temp[i] = val;
+                }
+
+                for (i = 0; i < SCH5627_NO_FANS; i++) {
+                        val = sch5627_read_virtual_reg16(data,
+                                                         SCH5627_REG_FAN[i]);
+                        if (unlikely(val < 0)) {
+                                ret = ERR_PTR(val);
+                                goto abort;
+                        }
+                        data->fan[i] = val;
+                }
+
+                for (i = 0; i < SCH5627_NO_IN; i++) {
+                        val = sch5627_read_virtual_reg12(data,
+                                SCH5627_REG_IN_MSB[i],
+                                SCH5627_REG_IN_LSN[i],
+                                SCH5627_REG_IN_HIGH_NIBBLE[i]);
+                        if (unlikely(val < 0)) {
+                                ret = ERR_PTR(val);
+                                goto abort;
+                        }
+                        data->in[i] = val;
+                }
+
+                data->last_updated = jiffies;
+                data->valid = 1;
+        }
+abort:
+        mutex_unlock(&data->update_lock);
+        return ret;
+}
+
+static int __devinit sch5627_read_limits(struct sch5627_data *data)
+{
+        int i, val;
+
+        for (i = 0; i < SCH5627_NO_TEMPS; i++) {
+                /*
+                 * Note what SMSC calls ABS, is what lm_sensors calls max
+                 * (aka high), and HIGH is what lm_sensors calls crit.
+                 */
+                val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]);
+                if (val < 0)
+                        return val;
+                data->temp_max[i] = val;
+
+                val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]);
+                if (val < 0)
+                        return val;
+                data->temp_crit[i] = val;
+        }
+        for (i = 0; i < SCH5627_NO_FANS; i++) {
+                val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]);
+                if (val < 0)
+                        return val;
+                data->fan_min[i] = val;
+        }
+
+        return 0;
+}
+
+static int reg_to_temp(u16 reg)
+{
+        return (reg * 625) / 10 - 64000;
+}
+
+static int reg_to_temp_limit(u8 reg)
+{
+        return (reg - 64) * 1000;
+}
+
+static int reg_to_rpm(u16 reg)
+{
+        if (reg == 0)
+                return -EIO;
+        if (reg == 0xffff)
+                return 0;
+
+        return 5400540 / reg;
+}
+
+static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
+        char *buf)
+{
+        return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
+}
+
+static ssize_t show_temp(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = sch5627_update_device(dev);
+        int val;
+
+        if (IS_ERR(data))
+                return PTR_ERR(data);
+
+        val = reg_to_temp(data->temp[attr->index]);
+        return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_temp_fault(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = sch5627_update_device(dev);
+
+        if (IS_ERR(data))
+                return PTR_ERR(data);
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
+}
+
+static ssize_t show_temp_max(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = dev_get_drvdata(dev);
+        int val;
+
+        val = reg_to_temp_limit(data->temp_max[attr->index]);
+        return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_temp_crit(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = dev_get_drvdata(dev);
+        int val;
+
+        val = reg_to_temp_limit(data->temp_crit[attr->index]);
+        return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_fan(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = sch5627_update_device(dev);
+        int val;
+
+        if (IS_ERR(data))
+                return PTR_ERR(data);
+
+        val = reg_to_rpm(data->fan[attr->index]);
+        if (val < 0)
+                return val;
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_fan_fault(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = sch5627_update_device(dev);
+
+        if (IS_ERR(data))
+                return PTR_ERR(data);
+
+        return snprintf(buf, PAGE_SIZE, "%d\n",
+                        data->fan[attr->index] == 0xffff);
+}
+
+static ssize_t show_fan_min(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = dev_get_drvdata(dev);
+        int val = reg_to_rpm(data->fan_min[attr->index]);
+        if (val < 0)
+                return val;
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_in(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct sch5627_data *data = sch5627_update_device(dev);
+        int val;
+
+        if (IS_ERR(data))
+                return PTR_ERR(data);
+
+        val = DIV_ROUND_CLOSEST(
+                data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
+                10000);
+        return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_in_label(struct device *dev, struct device_attribute
+        *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+        return snprintf(buf, PAGE_SIZE, "%s\n",
+                        SCH5627_IN_LABELS[attr->index]);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
+
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
+static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
+
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
+static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
+static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
+
+static struct attribute *sch5627_attributes[] = {
+        &dev_attr_name.attr,
+
+        &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_temp2_input.dev_attr.attr,
+        &sensor_dev_attr_temp3_input.dev_attr.attr,
+        &sensor_dev_attr_temp4_input.dev_attr.attr,
+        &sensor_dev_attr_temp5_input.dev_attr.attr,
+        &sensor_dev_attr_temp6_input.dev_attr.attr,
+        &sensor_dev_attr_temp7_input.dev_attr.attr,
+        &sensor_dev_attr_temp8_input.dev_attr.attr,
+        &sensor_dev_attr_temp1_fault.dev_attr.attr,
+        &sensor_dev_attr_temp2_fault.dev_attr.attr,
+        &sensor_dev_attr_temp3_fault.dev_attr.attr,
+        &sensor_dev_attr_temp4_fault.dev_attr.attr,
+        &sensor_dev_attr_temp5_fault.dev_attr.attr,
+        &sensor_dev_attr_temp6_fault.dev_attr.attr,
+        &sensor_dev_attr_temp7_fault.dev_attr.attr,
+        &sensor_dev_attr_temp8_fault.dev_attr.attr,
+        &sensor_dev_attr_temp1_max.dev_attr.attr,
+        &sensor_dev_attr_temp2_max.dev_attr.attr,
+        &sensor_dev_attr_temp3_max.dev_attr.attr,
+        &sensor_dev_attr_temp4_max.dev_attr.attr,
+        &sensor_dev_attr_temp5_max.dev_attr.attr,
+        &sensor_dev_attr_temp6_max.dev_attr.attr,
+        &sensor_dev_attr_temp7_max.dev_attr.attr,
+        &sensor_dev_attr_temp8_max.dev_attr.attr,
+        &sensor_dev_attr_temp1_crit.dev_attr.attr,
+        &sensor_dev_attr_temp2_crit.dev_attr.attr,
+        &sensor_dev_attr_temp3_crit.dev_attr.attr,
+        &sensor_dev_attr_temp4_crit.dev_attr.attr,
+        &sensor_dev_attr_temp5_crit.dev_attr.attr,
+        &sensor_dev_attr_temp6_crit.dev_attr.attr,
+        &sensor_dev_attr_temp7_crit.dev_attr.attr,
+        &sensor_dev_attr_temp8_crit.dev_attr.attr,
+
+        &sensor_dev_attr_fan1_input.dev_attr.attr,
+        &sensor_dev_attr_fan2_input.dev_attr.attr,
+        &sensor_dev_attr_fan3_input.dev_attr.attr,
+        &sensor_dev_attr_fan4_input.dev_attr.attr,
+        &sensor_dev_attr_fan1_fault.dev_attr.attr,
+        &sensor_dev_attr_fan2_fault.dev_attr.attr,
+        &sensor_dev_attr_fan3_fault.dev_attr.attr,
+        &sensor_dev_attr_fan4_fault.dev_attr.attr,
+        &sensor_dev_attr_fan1_min.dev_attr.attr,
+        &sensor_dev_attr_fan2_min.dev_attr.attr,
+        &sensor_dev_attr_fan3_min.dev_attr.attr,
+        &sensor_dev_attr_fan4_min.dev_attr.attr,
+
+        &sensor_dev_attr_in0_input.dev_attr.attr,
+        &sensor_dev_attr_in1_input.dev_attr.attr,
+        &sensor_dev_attr_in2_input.dev_attr.attr,
+        &sensor_dev_attr_in3_input.dev_attr.attr,
+        &sensor_dev_attr_in4_input.dev_attr.attr,
+        &sensor_dev_attr_in0_label.dev_attr.attr,
+        &sensor_dev_attr_in1_label.dev_attr.attr,
+        &sensor_dev_attr_in2_label.dev_attr.attr,
+        &sensor_dev_attr_in3_label.dev_attr.attr,
+        /* No in4_label as in4 is a generic input pin */
+
+        NULL
+};
+
+static const struct attribute_group sch5627_group = {
+        .attrs = sch5627_attributes,
+};
+
+static int sch5627_remove(struct platform_device *pdev)
+{
+        struct sch5627_data *data = platform_get_drvdata(pdev);
+
+        if (data->hwmon_dev)
+                hwmon_device_unregister(data->hwmon_dev);
+
+        sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
+        platform_set_drvdata(pdev, NULL);
+        kfree(data);
+
+        return 0;
+}
+
+static int __devinit sch5627_probe(struct platform_device *pdev)
+{
+        struct sch5627_data *data;
+        int err, build_code, build_id, hwmon_rev, val;
+
+        data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
+
+        data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
+        mutex_init(&data->update_lock);
+        platform_set_drvdata(pdev, data);
+
+        val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID);
+        if (val < 0) {
+                err = val;
+                goto error;
+        }
+        if (val != SCH5627_HWMON_ID) {
+                pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
+                       val, SCH5627_HWMON_ID);
+                err = -ENODEV;
+                goto error;
+        }
+
+        val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID);
+        if (val < 0) {
+                err = val;
+                goto error;
+        }
+        if (val != SCH5627_COMPANY_ID) {
+                pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
+                       val, SCH5627_COMPANY_ID);
+                err = -ENODEV;
+                goto error;
+        }
+
+        val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID);
+        if (val < 0) {
+                err = val;
+                goto error;
+        }
+        if (val != SCH5627_PRIMARY_ID) {
+                pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
+                       val, SCH5627_PRIMARY_ID);
+                err = -ENODEV;
+                goto error;
+        }
+
+        build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE);
+        if (build_code < 0) {
+                err = build_code;
+                goto error;
+        }
+
+        build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID);
+        if (build_id < 0) {
+                err = build_id;
+                goto error;
+        }
+
+        hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV);
+        if (hwmon_rev < 0) {
+                err = hwmon_rev;
+                goto error;
+        }
+
+        val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL);
+        if (val < 0) {
+                err = val;
+                goto error;
+        }
+        data->control = val;
+        if (!(data->control & 0x01)) {
+                pr_err("hardware monitoring not enabled\n");
+                err = -ENODEV;
+                goto error;
+        }
+        /* Trigger a Vbat voltage measurement, so that we get a valid reading
+           the first time we read Vbat */
+        sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
+                                  data->control | 0x10);
+        data->last_battery = jiffies;
+
+        /*
+         * Read limits, we do this only once as reading a register on
+         * the sch5627 is quite expensive (and they don't change).
+         */
+        err = sch5627_read_limits(data);
+        if (err)
+                goto error;
+
+        pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
+                build_code, build_id, hwmon_rev);
+
+        /* Register sysfs interface files */
+        err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
+        if (err)
+                goto error;
+
+        data->hwmon_dev = hwmon_device_register(&pdev->dev);
+        if (IS_ERR(data->hwmon_dev)) {
+                err = PTR_ERR(data->hwmon_dev);
+                data->hwmon_dev = NULL;
+                goto error;
+        }
+
+        return 0;
+
+error:
+        sch5627_remove(pdev);
+        return err;
+}
+
+static int __init sch5627_find(int sioaddr, unsigned short *address)
+{
+        u8 devid;
+        int err = superio_enter(sioaddr);
+        if (err)
+                return err;
+
+        devid = superio_inb(sioaddr, SIO_REG_DEVID);
+        if (devid != SIO_SCH5627_ID) {
+                pr_debug("Unsupported device id: 0x%02x\n",
+                         (unsigned int)devid);
+                err = -ENODEV;
+                goto exit;
+        }
+
+        superio_select(sioaddr, SIO_SCH5627_EM_LD);
+
+        if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
+                pr_warn("Device not activated\n");
+                err = -ENODEV;
+                goto exit;
+        }
+
+        /*
+         * Warning the order of the low / high byte is the other way around
+         * as on most other superio devices!!
+         */
+        *address = superio_inb(sioaddr, SIO_REG_ADDR) |
+                   superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
+        if (*address == 0) {
+                pr_warn("Base address not set\n");
+                err = -ENODEV;
+                goto exit;
+        }
+
+        pr_info("Found %s chip at %#hx\n", DEVNAME, *address);
+exit:
+        superio_exit(sioaddr);
+        return err;
+}
+
+static int __init sch5627_device_add(unsigned short address)
+{
+        struct resource res = {
+                .start  = address,
+                .end    = address + REGION_LENGTH - 1,
+                .flags  = IORESOURCE_IO,
+        };
+        int err;
+
+        sch5627_pdev = platform_device_alloc(DRVNAME, address);
+        if (!sch5627_pdev)
+                return -ENOMEM;
+
+        res.name = sch5627_pdev->name;
+        err = acpi_check_resource_conflict(&res);
+        if (err)
+                goto exit_device_put;
+
+        err = platform_device_add_resources(sch5627_pdev, &res, 1);
+        if (err) {
+                pr_err("Device resource addition failed\n");
+                goto exit_device_put;
+        }
+
+        err = platform_device_add(sch5627_pdev);
+        if (err) {
+                pr_err("Device addition failed\n");
+                goto exit_device_put;
+        }
+
+        return 0;
+
+exit_device_put:
+        platform_device_put(sch5627_pdev);
+
+        return err;
+}
+
+static struct platform_driver sch5627_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = DRVNAME,
+        },
+        .probe          = sch5627_probe,
+        .remove         = sch5627_remove,
+};
+
+static int __init sch5627_init(void)
+{
+        int err = -ENODEV;
+        unsigned short address;
+
+        if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address))
+                goto exit;
+
+        err = platform_driver_register(&sch5627_driver);
+        if (err)
+                goto exit;
+
+        err = sch5627_device_add(address);
+        if (err)
+                goto exit_driver;
+
+        return 0;
+
+exit_driver:
+        platform_driver_unregister(&sch5627_driver);
+exit:
+        return err;
+}
+
+static void __exit sch5627_exit(void)
+{
+        platform_device_unregister(sch5627_pdev);
+        platform_driver_unregister(&sch5627_driver);
+}
+
+MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");
+
+module_init(sch5627_init);
+module_exit(sch5627_exit);