hwmon: (it87) Add IT8728F support
Until we get a datasheet for the IT8728F, treat it as fully compatible
with the IT8721F, as it seems to work reasonably well.
This closes kernel bug #27262.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index 6f496a5..23b7def 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -26,6 +26,10 @@
Prefix: 'it8721'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Not publicly available
+ * IT8728F
+ Prefix: 'it8728'
+ Addresses scanned: from Super I/O config space (8 I/O ports)
+ Datasheet: Not publicly available
* SiS950 [clone of IT8705F]
Prefix: 'it87'
Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -71,7 +75,7 @@
-----------
This driver implements support for the IT8705F, IT8712F, IT8716F,
-IT8718F, IT8720F, IT8721F, IT8726F, IT8758E and SiS950 chips.
+IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E and SiS950 chips.
These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
joysticks and other miscellaneous stuff. For hardware monitoring, they
@@ -105,6 +109,9 @@
for AMD power sequencing. Therefore the chip will appear as IT8716F
to userspace applications.
+The IT8728F is considered compatible with the IT8721F, until a datasheet
+becomes available (hopefully.)
+
Temperatures are measured in degrees Celsius. An alarm is triggered once
when the Overtemperature Shutdown limit is crossed.
@@ -121,8 +128,8 @@
maximum limit. Note that minimum in this case always means 'closest to
zero'; this is important for negative voltage measurements. All voltage
inputs can measure voltages between 0 and 4.08 volts, with a resolution of
-0.016 volt (except IT8721F/IT8758E: 0.012 volt.) The battery voltage in8 does
-not have limit registers.
+0.016 volt (except IT8721F/IT8758E and IT8728F: 0.012 volt.) The battery
+voltage in8 does not have limit registers.
On the IT8721F/IT8758E, some voltage inputs are internal and scaled inside
the chip (in7, in8 and optionally in3). The driver handles this transparently
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index f468bbb..0226040 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -474,8 +474,8 @@
select HWMON_VID
help
If you say yes here you get support for ITE IT8705F, IT8712F,
- IT8716F, IT8718F, IT8720F, IT8721F, IT8726F and IT8758E sensor
- chips, and the SiS960 clone.
+ IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F and IT8758E
+ sensor chips, and the SiS960 clone.
This driver can also be built as a module. If so, the module
will be called it87.
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 603ef2a..0054d6f 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -17,6 +17,7 @@
* IT8720F Super I/O chip w/LPC interface
* IT8721F Super I/O chip w/LPC interface
* IT8726F Super I/O chip w/LPC interface
+ * IT8728F Super I/O chip w/LPC interface
* IT8758E Super I/O chip w/LPC interface
* Sis950 A clone of the IT8705F
*
@@ -58,7 +59,7 @@
#define DRVNAME "it87"
-enum chips { it87, it8712, it8716, it8718, it8720, it8721 };
+enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728 };
static unsigned short force_id;
module_param(force_id, ushort, 0);
@@ -135,6 +136,7 @@
#define IT8720F_DEVID 0x8720
#define IT8721F_DEVID 0x8721
#define IT8726F_DEVID 0x8726
+#define IT8728F_DEVID 0x8728
#define IT87_ACT_REG 0x30
#define IT87_BASE_REG 0x60
@@ -274,11 +276,31 @@
s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
};
+static inline int has_12mv_adc(const struct it87_data *data)
+{
+ /*
+ * IT8721F and later have a 12 mV ADC, also with internal scaling
+ * on selected inputs.
+ */
+ return data->type == it8721
+ || data->type == it8728;
+}
+
+static inline int has_newer_autopwm(const struct it87_data *data)
+{
+ /*
+ * IT8721F and later have separate registers for the temperature
+ * mapping and the manual duty cycle.
+ */
+ return data->type == it8721
+ || data->type == it8728;
+}
+
static u8 in_to_reg(const struct it87_data *data, int nr, long val)
{
long lsb;
- if (data->type == it8721) {
+ if (has_12mv_adc(data)) {
if (data->in_scaled & (1 << nr))
lsb = 24;
else
@@ -292,7 +314,7 @@
static int in_from_reg(const struct it87_data *data, int nr, int val)
{
- if (data->type == it8721) {
+ if (has_12mv_adc(data)) {
if (data->in_scaled & (1 << nr))
return val * 24;
else
@@ -329,7 +351,7 @@
static u8 pwm_to_reg(const struct it87_data *data, long val)
{
- if (data->type == it8721)
+ if (has_newer_autopwm(data))
return val;
else
return val >> 1;
@@ -337,7 +359,7 @@
static int pwm_from_reg(const struct it87_data *data, u8 reg)
{
- if (data->type == it8721)
+ if (has_newer_autopwm(data))
return reg;
else
return (reg & 0x7f) << 1;
@@ -374,7 +396,8 @@
|| data->type == it8716
|| data->type == it8718
|| data->type == it8720
- || data->type == it8721;
+ || data->type == it8721
+ || data->type == it8728;
}
static inline int has_old_autopwm(const struct it87_data *data)
@@ -842,7 +865,7 @@
data->fan_main_ctrl);
} else {
if (val == 1) /* Manual mode */
- data->pwm_ctrl[nr] = data->type == it8721 ?
+ data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
data->pwm_temp_map[nr] :
data->pwm_duty[nr];
else /* Automatic mode */
@@ -870,7 +893,7 @@
return -EINVAL;
mutex_lock(&data->update_lock);
- if (data->type == it8721) {
+ if (has_newer_autopwm(data)) {
/* If we are in automatic mode, the PWM duty cycle register
* is read-only so we can't write the value */
if (data->pwm_ctrl[nr] & 0x80) {
@@ -1311,8 +1334,8 @@
struct it87_data *data = dev_get_drvdata(dev);
int nr = to_sensor_dev_attr(attr)->index;
- return sprintf(buf, "%s\n", data->type == it8721 ? labels_it8721[nr]
- : labels[nr]);
+ return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
+ : labels[nr]);
}
static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
@@ -1605,6 +1628,9 @@
case IT8721F_DEVID:
sio_data->type = it8721;
break;
+ case IT8728F_DEVID:
+ sio_data->type = it8728;
+ break;
case 0xffff: /* No device at all */
goto exit;
default:
@@ -1646,8 +1672,11 @@
superio_select(GPIO);
reg = superio_inb(IT87_SIO_GPIO3_REG);
- if (sio_data->type == it8721) {
- /* The IT8721F/IT8758E doesn't have VID pins at all */
+ if (sio_data->type == it8721 || sio_data->type == it8728) {
+ /*
+ * The IT8721F/IT8758E doesn't have VID pins at all,
+ * not sure about the IT8728F.
+ */
sio_data->skip_vid = 1;
} else {
/* We need at least 4 VID pins */
@@ -1692,7 +1721,8 @@
}
if (reg & (1 << 0))
sio_data->internal |= (1 << 0);
- if ((reg & (1 << 1)) || sio_data->type == it8721)
+ if ((reg & (1 << 1)) || sio_data->type == it8721 ||
+ sio_data->type == it8728)
sio_data->internal |= (1 << 1);
sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
@@ -1770,6 +1800,7 @@
"it8718",
"it8720",
"it8721",
+ "it8728",
};
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
@@ -1807,7 +1838,7 @@
enable_pwm_interface = it87_check_pwm(dev);
/* Starting with IT8721F, we handle scaling of internal voltages */
- if (data->type == it8721) {
+ if (has_12mv_adc(data)) {
if (sio_data->internal & (1 << 0))
data->in_scaled |= (1 << 3); /* in3 is AVCC */
if (sio_data->internal & (1 << 1))
@@ -2093,7 +2124,7 @@
static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
{
data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
- if (data->type == it8721) {
+ if (has_newer_autopwm(data)) {
data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
data->pwm_duty[nr] = it87_read_value(data,
IT87_REG_PWM_DUTY(nr));