hwmon: (dme1737) Add support for the SMSC SCH5027

Add support for the SCH5027. The differences to the DME1737 are:
- No support for programmable temp offsets
- In auto mode, PWM outputs stay on min value if temp goes below low threshold
  and can't be programmed to fully turn off
- Different voltage scaling
- No VID input

Signed-off-by: Juerg Haefliger <juergh@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/Documentation/hwmon/dme1737 b/Documentation/hwmon/dme1737
index b1fe009994396030943ad570ddb84abe42611de5..001d2e70bc1125f404274734f6ad0b4b7825ca34 100644 (file)
--- a/Documentation/hwmon/dme1737
+++ b/Documentation/hwmon/dme1737
@@ -10,6 +10,10 @@ Supported chips:
     Prefix: 'sch311x'
     Addresses scanned: none, address read from Super-I/O config space
     Datasheet: http://www.nuhorizons.com/FeaturedProducts/Volume1/SMSC/311x.pdf
+  * SMSC SCH5027
+    Prefix: 'sch5027'
+    Addresses scanned: I2C 0x2c, 0x2d, 0x2e
+    Datasheet: Provided by SMSC upon request and under NDA
 
 Authors:
     Juerg Haefliger <juergh@gmail.com>
@@ -27,33 +31,31 @@ Module Parameters
                        following boards:
                        - VIA EPIA SN18000
 
-Note that there is no need to use this parameter if the driver loads without
-complaining. The driver will say so if it is necessary.
-
 
 Description
 -----------
 
 This driver implements support for the hardware monitoring capabilities of the
-SMSC DME1737 and Asus A8000 (which are the same) and SMSC SCH311x Super-I/O
-chips. These chips feature monitoring of 3 temp sensors temp[1-3] (2 remote
-diodes and 1 internal), 7 voltages in[0-6] (6 external and 1 internal) and up
-to 6 fan speeds fan[1-6]. Additionally, the chips implement up to 5 PWM
-outputs pwm[1-3,5-6] for controlling fan speeds both manually and
+SMSC DME1737 and Asus A8000 (which are the same), SMSC SCH5027, and SMSC
+SCH311x Super-I/O chips. These chips feature monitoring of 3 temp sensors
+temp[1-3] (2 remote diodes and 1 internal), 7 voltages in[0-6] (6 external and
+1 internal) and up to 6 fan speeds fan[1-6]. Additionally, the chips implement
+up to 5 PWM outputs pwm[1-3,5-6] for controlling fan speeds both manually and
 automatically.
 
-For the DME1737 and A8000, fan[1-2] and pwm[1-2] are always present. Fan[3-6]
-and pwm[3,5-6] are optional features and their availability depends on the
-configuration of the chip. The driver will detect which features are present
-during initialization and create the sysfs attributes accordingly.
+For the DME1737, A8000 and SCH5027, fan[1-2] and pwm[1-2] are always present.
+Fan[3-6] and pwm[3,5-6] are optional features and their availability depends on
+the configuration of the chip. The driver will detect which features are
+present during initialization and create the sysfs attributes accordingly.
 
 For the SCH311x, fan[1-3] and pwm[1-3] are always present and fan[4-6] and
 pwm[5-6] don't exist.
 
-The hardware monitoring features of the DME1737 and A8000 are only accessible
-via SMBus, while the SCH311x only provides access via the ISA bus. The driver
-will therefore register itself as an I2C client driver if it detects a DME1737
-or A8000 and as a platform driver if it detects a SCH311x chip.
+The hardware monitoring features of the DME1737, A8000, and SCH5027 are only
+accessible via SMBus, while the SCH311x only provides access via the ISA bus.
+The driver will therefore register itself as an I2C client driver if it detects
+a DME1737, A8000, or SCH5027 and as a platform driver if it detects a SCH311x
+chip.
 
 
 Voltage Monitoring
@@ -64,6 +66,7 @@ scaling resistors. The values returned by the driver therefore reflect true
 millivolts and don't need scaling. The voltage inputs are mapped as follows
 (the last column indicates the input ranges):
 
+DME1737, A8000:
        in0: +5VTR      (+5V standby)           0V - 6.64V
        in1: Vccp       (processor core)        0V - 3V
        in2: VCC        (internal +3.3V)        0V - 4.38V
@@ -72,6 +75,24 @@ millivolts and don't need scaling. The voltage inputs are mapped as follows
        in5: VTR        (+3.3V standby)         0V - 4.38V
        in6: Vbat       (+3.0V)                 0V - 4.38V
 
+SCH311x:
+       in0: +2.5V                              0V - 6.64V
+       in1: Vccp       (processor core)        0V - 2V
+       in2: VCC        (internal +3.3V)        0V - 4.38V
+       in3: +5V                                0V - 6.64V
+       in4: +12V                               0V - 16V
+       in5: VTR        (+3.3V standby)         0V - 4.38V
+       in6: Vbat       (+3.0V)                 0V - 4.38V
+
+SCH5027:
+       in0: +5VTR      (+5V standby)           0V - 6.64V
+       in1: Vccp       (processor core)        0V - 3V
+       in2: VCC        (internal +3.3V)        0V - 4.38V
+       in3: V2_IN                              0V - 1.5V
+       in4: V1_IN                              0V - 1.5V
+       in5: VTR        (+3.3V standby)         0V - 4.38V
+       in6: Vbat       (+3.0V)                 0V - 4.38V
+
 Each voltage input has associated min and max limits which trigger an alarm
 when crossed.
 

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index c882fd05cf2920d464da928eb165b3e7914044f3..1de240a26fc5b3466c786961f8f577caeb363b6f 100644 (file)
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -575,8 +575,8 @@ config SENSORS_DME1737
        select HWMON_VID
        help
          If you say yes here you get support for the hardware monitoring
-         and fan control features of the SMSC DME1737 (and compatibles
-         like the Asus A8000) and SCH311x Super-I/O chips.
+         and fan control features of the SMSC DME1737, SCH311x, SCH5027, and
+         Asus A8000 Super-I/O chips.
 
          This driver can also be built as a module.  If so, the module
          will be called dme1737.

diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
index b36290048b982c00ec38c68cb6ff1c053dcf742c..cdb8311e4ef730c503d814de22442917595e9c82 100644 (file)
--- a/drivers/hwmon/dme1737.c
+++ b/drivers/hwmon/dme1737.c
@@ -1,11 +1,11 @@
 /*
- * dme1737.c - Driver for the SMSC DME1737, Asus A8000, and SMSC SCH311x
- *             Super-I/O chips integrated hardware monitoring features.
- * Copyright (c) 2007 Juerg Haefliger <juergh@gmail.com>
+ * dme1737.c - Driver for the SMSC DME1737, Asus A8000, SMSC SCH311x and
+ *             SCH5027 Super-I/O chips integrated hardware monitoring features.
+ * Copyright (c) 2007, 2008 Juerg Haefliger <juergh@gmail.com>
  *
  * This driver is an I2C/ISA hybrid, meaning that it uses the I2C bus to access
- * the chip registers if a DME1737 (or A8000) is found and the ISA bus if a
- * SCH311x chip is found. Both types of chips have very similar hardware
+ * the chip registers if a DME1737, A8000, or SCH5027 is found and the ISA bus
+ * if a SCH311x chip is found. Both types of chips have very similar hardware
  * monitoring capabilities but differ in the way they can be accessed.
  *
  * This program is free software; you can redistribute it and/or modify
@@ -57,7 +57,10 @@ MODULE_PARM_DESC(probe_all_addr, "Include probing of non-standard LPC "
 static const unsigned short normal_i2c[] = {0x2c, 0x2d, 0x2e, I2C_CLIENT_END};
 
 /* Insmod parameters */
-I2C_CLIENT_INSMOD_1(dme1737);
+I2C_CLIENT_INSMOD_2(dme1737, sch5027);
+
+/* ISA chip types */
+enum isa_chips { sch311x = sch5027 + 1 };
 
 /* ---------------------------------------------------------------------
  * Registers
@@ -163,6 +166,7 @@ static const u8 DME1737_BIT_ALARM_FAN[] = {10, 11, 12, 13, 22, 23};
 #define DME1737_VERSTEP                0x88
 #define DME1737_VERSTEP_MASK   0xf8
 #define SCH311X_DEVICE         0x8c
+#define SCH5027_VERSTEP                0x69
 
 /* Length of ISA address segment */
 #define DME1737_EXTENT 2
@@ -182,6 +186,7 @@ struct dme1737_data {
        unsigned long last_update;      /* in jiffies */
        unsigned long last_vbat;        /* in jiffies */
        enum chips type;
+       const int *in_nominal;          /* pointer to IN_NOMINAL array */
 
        u8 vid;
        u8 pwm_rr_en;
@@ -220,23 +225,23 @@ static const int IN_NOMINAL_DME1737[] = {5000, 2250, 3300, 5000, 12000, 3300,
                                         3300};
 static const int IN_NOMINAL_SCH311x[] = {2500, 1500, 3300, 5000, 12000, 3300,
                                         3300};
-#define IN_NOMINAL(ix, type)   (((type) == dme1737) ? \
-                               IN_NOMINAL_DME1737[(ix)] : \
-                               IN_NOMINAL_SCH311x[(ix)])
+static const int IN_NOMINAL_SCH5027[] = {5000, 2250, 3300, 1125, 1125, 3300,
+                                        3300};
+#define IN_NOMINAL(type)       ((type) == sch311x ? IN_NOMINAL_SCH311x : \
+                                (type) == sch5027 ? IN_NOMINAL_SCH5027 : \
+                                IN_NOMINAL_DME1737)
 
 /* Voltage input
  * Voltage inputs have 16 bits resolution, limit values have 8 bits
  * resolution. */
-static inline int IN_FROM_REG(int reg, int ix, int res, int type)
+static inline int IN_FROM_REG(int reg, int nominal, int res)
 {
-       return (reg * IN_NOMINAL(ix, type) + (3 << (res - 3))) /
-               (3 << (res - 2));
+       return (reg * nominal + (3 << (res - 3))) / (3 << (res - 2));
 }
 
-static inline int IN_TO_REG(int val, int ix, int type)
+static inline int IN_TO_REG(int val, int nominal)
 {
-       return SENSORS_LIMIT((val * 192 + IN_NOMINAL(ix, type) / 2) /
-                            IN_NOMINAL(ix, type), 0, 255);
+       return SENSORS_LIMIT((val * 192 + nominal / 2) / nominal, 0, 255);
 }
 
 /* Temperature input
@@ -565,7 +570,10 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
 
        /* Sample register contents every 1 sec */
        if (time_after(jiffies, data->last_update + HZ) || !data->valid) {
-               data->vid = dme1737_read(client, DME1737_REG_VID) & 0x3f;
+               if (data->type != sch5027) {
+                       data->vid = dme1737_read(client, DME1737_REG_VID) &
+                               0x3f;
+               }
 
                /* In (voltage) registers */
                for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
@@ -593,8 +601,10 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
                                        DME1737_REG_TEMP_MIN(ix));
                        data->temp_max[ix] = dme1737_read(client,
                                        DME1737_REG_TEMP_MAX(ix));
-                       data->temp_offset[ix] = dme1737_read(client,
-                                       DME1737_REG_TEMP_OFFSET(ix));
+                       if (data->type != sch5027) {
+                               data->temp_offset[ix] = dme1737_read(client,
+                                               DME1737_REG_TEMP_OFFSET(ix));
+                       }
                }
 
                /* In and temp LSB registers
@@ -669,9 +679,11 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
                        data->zone_abs[ix] = dme1737_read(client,
                                        DME1737_REG_ZONE_ABS(ix));
                }
-               for (ix = 0; ix < ARRAY_SIZE(data->zone_hyst); ix++) {
-                       data->zone_hyst[ix] = dme1737_read(client,
+               if (data->type != sch5027) {
+                       for (ix = 0; ix < ARRAY_SIZE(data->zone_hyst); ix++) {
+                               data->zone_hyst[ix] = dme1737_read(client,
                                                DME1737_REG_ZONE_HYST(ix));
+                       }
                }
 
                /* Alarm registers */
@@ -735,13 +747,13 @@ static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 
        switch (fn) {
        case SYS_IN_INPUT:
-               res = IN_FROM_REG(data->in[ix], ix, 16, data->type);
+               res = IN_FROM_REG(data->in[ix], data->in_nominal[ix], 16);
                break;
        case SYS_IN_MIN:
-               res = IN_FROM_REG(data->in_min[ix], ix, 8, data->type);
+               res = IN_FROM_REG(data->in_min[ix], data->in_nominal[ix], 8);
                break;
        case SYS_IN_MAX:
-               res = IN_FROM_REG(data->in_max[ix], ix, 8, data->type);
+               res = IN_FROM_REG(data->in_max[ix], data->in_nominal[ix], 8);
                break;
        case SYS_IN_ALARM:
                res = (data->alarms >> DME1737_BIT_ALARM_IN[ix]) & 0x01;
@@ -768,12 +780,12 @@ static ssize_t set_in(struct device *dev, struct device_attribute *attr,
        mutex_lock(&data->update_lock);
        switch (fn) {
        case SYS_IN_MIN:
-               data->in_min[ix] = IN_TO_REG(val, ix, data->type);
+               data->in_min[ix] = IN_TO_REG(val, data->in_nominal[ix]);
                dme1737_write(client, DME1737_REG_IN_MIN(ix),
                              data->in_min[ix]);
                break;
        case SYS_IN_MAX:
-               data->in_max[ix] = IN_TO_REG(val, ix, data->type);
+               data->in_max[ix] = IN_TO_REG(val, data->in_nominal[ix]);
                dme1737_write(client, DME1737_REG_IN_MAX(ix),
                              data->in_max[ix]);
                break;
@@ -1570,43 +1582,56 @@ static struct attribute *dme1737_attr[] ={
        &sensor_dev_attr_temp1_max.dev_attr.attr,
        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
        &sensor_dev_attr_temp1_fault.dev_attr.attr,
-       &sensor_dev_attr_temp1_offset.dev_attr.attr,
        &sensor_dev_attr_temp2_input.dev_attr.attr,
        &sensor_dev_attr_temp2_min.dev_attr.attr,
        &sensor_dev_attr_temp2_max.dev_attr.attr,
        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
        &sensor_dev_attr_temp2_fault.dev_attr.attr,
-       &sensor_dev_attr_temp2_offset.dev_attr.attr,
        &sensor_dev_attr_temp3_input.dev_attr.attr,
        &sensor_dev_attr_temp3_min.dev_attr.attr,
        &sensor_dev_attr_temp3_max.dev_attr.attr,
        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
        &sensor_dev_attr_temp3_fault.dev_attr.attr,
-       &sensor_dev_attr_temp3_offset.dev_attr.attr,
        /* Zones */
-       &sensor_dev_attr_zone1_auto_point1_temp_hyst.dev_attr.attr,
        &sensor_dev_attr_zone1_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_zone1_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_zone1_auto_point3_temp.dev_attr.attr,
        &sensor_dev_attr_zone1_auto_channels_temp.dev_attr.attr,
-       &sensor_dev_attr_zone2_auto_point1_temp_hyst.dev_attr.attr,
        &sensor_dev_attr_zone2_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_zone2_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_zone2_auto_point3_temp.dev_attr.attr,
        &sensor_dev_attr_zone2_auto_channels_temp.dev_attr.attr,
-       &sensor_dev_attr_zone3_auto_point1_temp_hyst.dev_attr.attr,
        &sensor_dev_attr_zone3_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_zone3_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_zone3_auto_point3_temp.dev_attr.attr,
        &sensor_dev_attr_zone3_auto_channels_temp.dev_attr.attr,
+       NULL
+};
+
+static const struct attribute_group dme1737_group = {
+       .attrs = dme1737_attr,
+};
+
+/* The following struct holds misc attributes, which are not available in all
+ * chips. Their creation depends on the chip type which is determined during
+ * module load. */
+static struct attribute *dme1737_misc_attr[] = {
+       /* Temperatures */
+       &sensor_dev_attr_temp1_offset.dev_attr.attr,
+       &sensor_dev_attr_temp2_offset.dev_attr.attr,
+       &sensor_dev_attr_temp3_offset.dev_attr.attr,
+       /* Zones */
+       &sensor_dev_attr_zone1_auto_point1_temp_hyst.dev_attr.attr,
+       &sensor_dev_attr_zone2_auto_point1_temp_hyst.dev_attr.attr,
+       &sensor_dev_attr_zone3_auto_point1_temp_hyst.dev_attr.attr,
        /* Misc */
        &dev_attr_vrm.attr,
        &dev_attr_cpu0_vid.attr,
        NULL
 };
 
-static const struct attribute_group dme1737_group = {
-       .attrs = dme1737_attr,
+static const struct attribute_group dme1737_misc_group = {
+       .attrs = dme1737_misc_attr,
 };
 
 /* The following structs hold the PWM attributes, some of which are optional.
@@ -1618,7 +1643,6 @@ static struct attribute *dme1737_pwm1_attr[] = {
        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
        &sensor_dev_attr_pwm1_ramp_rate.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_channels_zone.dev_attr.attr,
-       &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
        NULL
@@ -1629,7 +1653,6 @@ static struct attribute *dme1737_pwm2_attr[] = {
        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
        &sensor_dev_attr_pwm2_ramp_rate.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_channels_zone.dev_attr.attr,
-       &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
        NULL
@@ -1640,7 +1663,6 @@ static struct attribute *dme1737_pwm3_attr[] = {
        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
        &sensor_dev_attr_pwm3_ramp_rate.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_channels_zone.dev_attr.attr,
-       &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
        NULL
@@ -1667,6 +1689,15 @@ static const struct attribute_group dme1737_pwm_group[] = {
        { .attrs = dme1737_pwm6_attr },
 };
 
+/* The following struct holds misc PWM attributes, which are not available in
+ * all chips. Their creation depends on the chip type which is determined
+ * during module load. */
+static struct attribute *dme1737_pwm_misc_attr[] = {
+       &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
+       &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
+       &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
+};
+
 /* The following structs hold the fan attributes, some of which are optional.
  * Their creation depends on the chip configuration which is determined during
  * module load. */
@@ -1722,31 +1753,23 @@ static const struct attribute_group dme1737_fan_group[] = {
        { .attrs = dme1737_fan6_attr },
 };
 
-/* The permissions of all of the following attributes are changed to read-
+/* The permissions of the following zone attributes are changed to read-
  * writeable if the chip is *not* locked. Otherwise they stay read-only. */
-static struct attribute *dme1737_misc_chmod_attr[] = {
-       /* Temperatures */
-       &sensor_dev_attr_temp1_offset.dev_attr.attr,
-       &sensor_dev_attr_temp2_offset.dev_attr.attr,
-       &sensor_dev_attr_temp3_offset.dev_attr.attr,
-       /* Zones */
-       &sensor_dev_attr_zone1_auto_point1_temp_hyst.dev_attr.attr,
+static struct attribute *dme1737_zone_chmod_attr[] = {
        &sensor_dev_attr_zone1_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_zone1_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_zone1_auto_point3_temp.dev_attr.attr,
-       &sensor_dev_attr_zone2_auto_point1_temp_hyst.dev_attr.attr,
        &sensor_dev_attr_zone2_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_zone2_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_zone2_auto_point3_temp.dev_attr.attr,
-       &sensor_dev_attr_zone3_auto_point1_temp_hyst.dev_attr.attr,
        &sensor_dev_attr_zone3_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_zone3_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_zone3_auto_point3_temp.dev_attr.attr,
        NULL
 };
 
-static const struct attribute_group dme1737_misc_chmod_group = {
-       .attrs = dme1737_misc_chmod_attr,
+static const struct attribute_group dme1737_zone_chmod_group = {
+       .attrs = dme1737_zone_chmod_attr,
 };
 
 /* The permissions of the following PWM attributes are changed to read-
@@ -1757,7 +1780,6 @@ static struct attribute *dme1737_pwm1_chmod_attr[] = {
        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
        &sensor_dev_attr_pwm1_ramp_rate.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_channels_zone.dev_attr.attr,
-       &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
        NULL
 };
@@ -1766,7 +1788,6 @@ static struct attribute *dme1737_pwm2_chmod_attr[] = {
        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
        &sensor_dev_attr_pwm2_ramp_rate.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_channels_zone.dev_attr.attr,
-       &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
        NULL
 };
@@ -1775,7 +1796,6 @@ static struct attribute *dme1737_pwm3_chmod_attr[] = {
        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
        &sensor_dev_attr_pwm3_ramp_rate.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_channels_zone.dev_attr.attr,
-       &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
        NULL
 };
@@ -1875,9 +1895,17 @@ static void dme1737_remove_files(struct device *dev)
                if (data->has_pwm & (1 << ix)) {
                        sysfs_remove_group(&dev->kobj,
                                           &dme1737_pwm_group[ix]);
+                       if (data->type != sch5027 && ix < 3) {
+                               sysfs_remove_file(&dev->kobj,
+                                                 dme1737_pwm_misc_attr[ix]);
+                       }
                }
        }
 
+       if (data->type != sch5027) {
+               sysfs_remove_group(&dev->kobj, &dme1737_misc_group);
+       }
+
        sysfs_remove_group(&dev->kobj, &dme1737_group);
 
        if (!data->client.driver) {
@@ -1901,6 +1929,13 @@ static int dme1737_create_files(struct device *dev)
                goto exit_remove;
        }
 
+       /* Create misc sysfs attributes */
+       if ((data->type != sch5027) &&
+           (err = sysfs_create_group(&dev->kobj,
+                                     &dme1737_misc_group))) {
+               goto exit_remove;
+       }
+
        /* Create fan sysfs attributes */
        for (ix = 0; ix < ARRAY_SIZE(dme1737_fan_group); ix++) {
                if (data->has_fan & (1 << ix)) {
@@ -1918,6 +1953,11 @@ static int dme1737_create_files(struct device *dev)
                                                &dme1737_pwm_group[ix]))) {
                                goto exit_remove;
                        }
+                       if (data->type != sch5027 && ix < 3 &&
+                           (err = sysfs_create_file(&dev->kobj,
+                                               dme1737_pwm_misc_attr[ix]))) {
+                               goto exit_remove;
+                       }
                }
        }
 
@@ -1927,16 +1967,27 @@ static int dme1737_create_files(struct device *dev)
                dev_info(dev, "Device is locked. Some attributes "
                         "will be read-only.\n");
        } else {
-               /* Change permissions of standard sysfs attributes */
-               dme1737_chmod_group(dev, &dme1737_misc_chmod_group,
+               /* Change permissions of zone sysfs attributes */
+               dme1737_chmod_group(dev, &dme1737_zone_chmod_group,
                                    S_IRUGO | S_IWUSR);
 
+               /* Change permissions of misc sysfs attributes */
+               if (data->type != sch5027) {
+                       dme1737_chmod_group(dev, &dme1737_misc_group,
+                                           S_IRUGO | S_IWUSR);
+               }
+
                /* Change permissions of PWM sysfs attributes */
                for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_chmod_group); ix++) {
                        if (data->has_pwm & (1 << ix)) {
                                dme1737_chmod_group(dev,
                                                &dme1737_pwm_chmod_group[ix],
                                                S_IRUGO | S_IWUSR);
+                               if (data->type != sch5027 && ix < 3) {
+                                       dme1737_chmod_file(dev,
+                                               dme1737_pwm_misc_attr[ix],
+                                               S_IRUGO | S_IWUSR);
+                               }
                        }
                }
 
@@ -1966,6 +2017,9 @@ static int dme1737_init_device(struct device *dev)
        int ix;
        u8 reg;
 
+       /* Point to the right nominal voltages array */
+       data->in_nominal = IN_NOMINAL(data->type);
+
        data->config = dme1737_read(client, DME1737_REG_CONFIG);
        /* Inform if part is not monitoring/started */
        if (!(data->config & 0x01)) {
@@ -2076,7 +2130,9 @@ static int dme1737_init_device(struct device *dev)
        data->pwm_acz[2] = 4;   /* pwm3 -> zone3 */
 
        /* Set VRM */
-       data->vrm = vid_which_vrm();
+       if (data->type != sch5027) {
+               data->vrm = vid_which_vrm();
+       }
 
        return 0;
 }
@@ -2095,9 +2151,10 @@ static int dme1737_i2c_get_features(int sio_cip, struct dme1737_data *data)
        dme1737_sio_enter(sio_cip);
 
        /* Check device ID
-        * The DME1737 can return either 0x78 or 0x77 as its device ID. */
+        * The DME1737 can return either 0x78 or 0x77 as its device ID.
+        * The SCH5027 returns 0x89 as its device ID. */
        reg = force_id ? force_id : dme1737_sio_inb(sio_cip, 0x20);
-       if (!(reg == 0x77 || reg == 0x78)) {
+       if (!(reg == 0x77 || reg == 0x78 || reg == 0x89)) {
                err = -ENODEV;
                goto exit;
        }
@@ -2166,15 +2223,24 @@ static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
                company = dme1737_read(client, DME1737_REG_COMPANY);
                verstep = dme1737_read(client, DME1737_REG_VERSTEP);
 
-               if (!((company == DME1737_COMPANY_SMSC) &&
-                     ((verstep & DME1737_VERSTEP_MASK) == DME1737_VERSTEP))) {
+               if (company == DME1737_COMPANY_SMSC &&
+                   (verstep & DME1737_VERSTEP_MASK) == DME1737_VERSTEP) {
+                       kind = dme1737;
+               } else if (company == DME1737_COMPANY_SMSC &&
+                          verstep == SCH5027_VERSTEP) {
+                       kind = sch5027;
+               } else {
                        err = -ENODEV;
                        goto exit_kfree;
                }
        }
 
-       kind = dme1737;
-       name = "dme1737";
+       if (kind == sch5027) {
+               name = "sch5027";
+       } else {
+               kind = dme1737;
+               name = "dme1737";
+       }
        data->type = kind;
 
        /* Fill in the remaining client fields and put it into the global
@@ -2187,8 +2253,9 @@ static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
                goto exit_kfree;
        }
 
-       dev_info(dev, "Found a DME1737 chip at 0x%02x (rev 0x%02x).\n",
-                client->addr, verstep);
+       dev_info(dev, "Found a %s chip at 0x%02x (rev 0x%02x).\n",
+                kind == sch5027 ? "SCH5027" : "DME1737", client->addr,
+                verstep);
 
        /* Initialize the DME1737 chip */
        if ((err = dme1737_init_device(dev))) {
@@ -2371,7 +2438,7 @@ static int __devinit dme1737_isa_probe(struct platform_device *pdev)
                        goto exit_kfree;
                }
        }
-       data->type = -1;
+       data->type = sch311x;
 
        /* Fill in the remaining client fields and initialize the mutex */
        strlcpy(client->name, "sch311x", I2C_NAME_SIZE);