Hi, Greg,
I wrote a patch which adds reset option to the it87 driver talking
with Jean Delvare.
* Do not reset the registers unless users want to do because
resetting registers makes all fans go to full power and we can
usually rely on values set by BIOS
* Remove all limit initializations as they should be done from
user-space
* Better register mask for start of monitoring
The patch has been reviewed by Jean.
Thanks in advance.
Jean,
Thanks for your kind advices! I'll go on with the next part.
--- linux-2.6.3/drivers/i2c/chips/it87.c.sensor_type 2004-02-25 10:27:21.000000000 +0900
+++ linux-2.6.3/drivers/i2c/chips/it87.c 2004-02-28 13:38:21.000000000 +0900
@@ -55,7 +55,10 @@
/* Update battery voltage after every reading if true */
-static int update_vbat = 0;
+static int update_vbat;
+
+/* Reset the registers on init if true */
+static int reset;
/* Many IT87 constants specified below */
@@ -822,80 +825,45 @@
return i2c_smbus_write_byte_data(client, reg, value);
}
-/* Called when we have found a new IT87. It should set limits, etc. */
+/* Called when we have found a new IT87. */
static void it87_init_client(struct i2c_client *client, struct it87_data *data)
{
- /* Reset all except Watchdog values and last conversion values
- This sets fan-divs to 2, among others */
- it87_write_value(client, IT87_REG_CONFIG, 0x80);
- it87_write_value(client, IT87_REG_VIN_MIN(0),
- IN_TO_REG(IT87_INIT_IN_MIN_0));
- it87_write_value(client, IT87_REG_VIN_MAX(0),
- IN_TO_REG(IT87_INIT_IN_MAX_0));
- it87_write_value(client, IT87_REG_VIN_MIN(1),
- IN_TO_REG(IT87_INIT_IN_MIN_1));
- it87_write_value(client, IT87_REG_VIN_MAX(1),
- IN_TO_REG(IT87_INIT_IN_MAX_1));
- it87_write_value(client, IT87_REG_VIN_MIN(2),
- IN_TO_REG(IT87_INIT_IN_MIN_2));
- it87_write_value(client, IT87_REG_VIN_MAX(2),
- IN_TO_REG(IT87_INIT_IN_MAX_2));
- it87_write_value(client, IT87_REG_VIN_MIN(3),
- IN_TO_REG(IT87_INIT_IN_MIN_3));
- it87_write_value(client, IT87_REG_VIN_MAX(3),
- IN_TO_REG(IT87_INIT_IN_MAX_3));
- it87_write_value(client, IT87_REG_VIN_MIN(4),
- IN_TO_REG(IT87_INIT_IN_MIN_4));
- it87_write_value(client, IT87_REG_VIN_MAX(4),
- IN_TO_REG(IT87_INIT_IN_MAX_4));
- it87_write_value(client, IT87_REG_VIN_MIN(5),
- IN_TO_REG(IT87_INIT_IN_MIN_5));
- it87_write_value(client, IT87_REG_VIN_MAX(5),
- IN_TO_REG(IT87_INIT_IN_MAX_5));
- it87_write_value(client, IT87_REG_VIN_MIN(6),
- IN_TO_REG(IT87_INIT_IN_MIN_6));
- it87_write_value(client, IT87_REG_VIN_MAX(6),
- IN_TO_REG(IT87_INIT_IN_MAX_6));
- it87_write_value(client, IT87_REG_VIN_MIN(7),
- IN_TO_REG(IT87_INIT_IN_MIN_7));
- it87_write_value(client, IT87_REG_VIN_MAX(7),
- IN_TO_REG(IT87_INIT_IN_MAX_7));
- /* Note: Battery voltage does not have limit registers */
- it87_write_value(client, IT87_REG_FAN_MIN(0),
- FAN_TO_REG(IT87_INIT_FAN_MIN_1, 2));
- it87_write_value(client, IT87_REG_FAN_MIN(1),
- FAN_TO_REG(IT87_INIT_FAN_MIN_2, 2));
- it87_write_value(client, IT87_REG_FAN_MIN(2),
- FAN_TO_REG(IT87_INIT_FAN_MIN_3, 2));
- it87_write_value(client, IT87_REG_TEMP_HIGH(0),
- TEMP_TO_REG(IT87_INIT_TEMP_HIGH_1));
- it87_write_value(client, IT87_REG_TEMP_LOW(0),
- TEMP_TO_REG(IT87_INIT_TEMP_LOW_1));
- it87_write_value(client, IT87_REG_TEMP_HIGH(1),
- TEMP_TO_REG(IT87_INIT_TEMP_HIGH_2));
- it87_write_value(client, IT87_REG_TEMP_LOW(1),
- TEMP_TO_REG(IT87_INIT_TEMP_LOW_2));
- it87_write_value(client, IT87_REG_TEMP_HIGH(2),
- TEMP_TO_REG(IT87_INIT_TEMP_HIGH_3));
- it87_write_value(client, IT87_REG_TEMP_LOW(2),
- TEMP_TO_REG(IT87_INIT_TEMP_LOW_3));
-
- /* Enable voltage monitors */
- it87_write_value(client, IT87_REG_VIN_ENABLE, 0xff);
-
- /* Enable Temp1-Temp3 */
- data->sensor = (it87_read_value(client, IT87_REG_TEMP_ENABLE) & 0xc0);
- data->sensor |= 0x2a; /* Temp1,Temp3=thermistor; Temp2=thermal diode */
- it87_write_value(client, IT87_REG_TEMP_ENABLE, data->sensor);
+ int tmp;
+
+ if (reset) {
+ /* Reset all except Watchdog values and last conversion values
+ This sets fan-divs to 2, among others */
+ it87_write_value(client, IT87_REG_CONFIG, 0x80);
+
+ }
- /* Enable fans */
- it87_write_value(client, IT87_REG_FAN_CTRL,
- (it87_read_value(client, IT87_REG_FAN_CTRL) & 0x8f)
- | 0x70);
+ /* Check if temperature channnels are reset manually or by some reason */
+ tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE);
+ if ((tmp & 0x3f) == 0) {
+ /* Temp1,Temp3=thermistor; Temp2=thermal diode */
+ tmp = (tmp & 0xc0) | 0x2a;
+ it87_write_value(client, IT87_REG_TEMP_ENABLE, tmp);
+ }
+ data->sensor = tmp;
+
+ /* Check if voltage monitors are reset manually or by some reason */
+ tmp = it87_read_value(client, IT87_REG_VIN_ENABLE);
+ if ((tmp & 0xff) == 0) {
+ /* Enable all voltage monitors */
+ it87_write_value(client, IT87_REG_VIN_ENABLE, 0xff);
+ }
+
+ /* Check if tachometers are reset manually or by some reason */
+ tmp = it87_read_value(client, IT87_REG_FAN_CTRL);
+ if ((tmp & 0x70) == 0) {
+ /* Enable all fan tachometers */
+ tmp = (tmp & 0x8f) | 0x70;
+ it87_write_value(client, IT87_REG_FAN_CTRL, tmp);
+ }
/* Start monitoring */
it87_write_value(client, IT87_REG_CONFIG,
- (it87_read_value(client, IT87_REG_CONFIG) & 0xb7)
+ (it87_read_value(client, IT87_REG_CONFIG) & 0x36)
| (update_vbat ? 0x41 : 0x01));
}
@@ -988,6 +956,8 @@
MODULE_DESCRIPTION("IT8705F, IT8712F, Sis950 driver");
MODULE_PARM(update_vbat, "i");
MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
+MODULE_PARM(reset, "i");
+MODULE_PARM_DESC(reset, "Reset the chip's registers, default no");
MODULE_LICENSE("GPL");
module_init(sm_it87_init);
-----------------------
Takeru Komoriya
komoriya at paken.org
http://www.paken.org/
