diff options
Diffstat (limited to 'drivers/i2c/chips/adm9240.c')
| -rw-r--r-- | drivers/i2c/chips/adm9240.c | 791 |
1 files changed, 0 insertions, 791 deletions
diff --git a/drivers/i2c/chips/adm9240.c b/drivers/i2c/chips/adm9240.c deleted file mode 100644 index 5c68e9c311a..00000000000 --- a/drivers/i2c/chips/adm9240.c +++ /dev/null @@ -1,791 +0,0 @@ -/* - * adm9240.c Part of lm_sensors, Linux kernel modules for hardware - * monitoring - * - * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> - * Philip Edelbrock <phil@netroedge.com> - * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> - * Copyright (C) 2005 Grant Coady <gcoady@gmail.com> with valuable - * guidance from Jean Delvare - * - * Driver supports Analog Devices ADM9240 - * Dallas Semiconductor DS1780 - * National Semiconductor LM81 - * - * ADM9240 is the reference, DS1780 and LM81 are register compatibles - * - * Voltage Six inputs are scaled by chip, VID also reported - * Temperature Chip temperature to 0.5'C, maximum and max_hysteris - * Fans 2 fans, low speed alarm, automatic fan clock divider - * Alarms 16-bit map of active alarms - * Analog Out 0..1250 mV output - * - * Chassis Intrusion: clear CI latch with 'echo 1 > chassis_clear' - * - * Test hardware: Intel SE440BX-2 desktop motherboard --Grant - * - * LM81 extended temp reading not implemented - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/i2c-sensor.h> -#include <linux/i2c-vid.h> - -/* Addresses to scan */ -static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, - I2C_CLIENT_END }; - -static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; - -/* Insmod parameters */ -SENSORS_INSMOD_3(adm9240, ds1780, lm81); - -/* ADM9240 registers */ -#define ADM9240_REG_MAN_ID 0x3e -#define ADM9240_REG_DIE_REV 0x3f -#define ADM9240_REG_CONFIG 0x40 - -#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ -#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) -#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) -#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ -#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) -#define ADM9240_REG_INT(nr) (0x41 + (nr)) -#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) -#define ADM9240_REG_TEMP 0x27 -#define ADM9240_REG_TEMP_HIGH 0x39 -#define ADM9240_REG_TEMP_HYST 0x3a -#define ADM9240_REG_ANALOG_OUT 0x19 -#define ADM9240_REG_CHASSIS_CLEAR 0x46 -#define ADM9240_REG_VID_FAN_DIV 0x47 -#define ADM9240_REG_I2C_ADDR 0x48 -#define ADM9240_REG_VID4 0x49 -#define ADM9240_REG_TEMP_CONF 0x4b - -/* generalised scaling with integer rounding */ -static inline int SCALE(long val, int mul, int div) -{ - if (val < 0) - return (val * mul - div / 2) / div; - else - return (val * mul + div / 2) / div; -} - -/* adm9240 internally scales voltage measurements */ -static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; - -static inline unsigned int IN_FROM_REG(u8 reg, int n) -{ - return SCALE(reg, nom_mv[n], 192); -} - -static inline u8 IN_TO_REG(unsigned long val, int n) -{ - return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); -} - -/* temperature range: -40..125, 127 disables temperature alarm */ -static inline s8 TEMP_TO_REG(long val) -{ - return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127); -} - -/* two fans, each with low fan speed limit */ -static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) -{ - if (!reg) /* error */ - return -1; - - if (reg == 255) - return 0; - - return SCALE(1350000, 1, reg * div); -} - -/* analog out 0..1250mV */ -static inline u8 AOUT_TO_REG(unsigned long val) -{ - return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255); -} - -static inline unsigned int AOUT_FROM_REG(u8 reg) -{ - return SCALE(reg, 1250, 255); -} - -static int adm9240_attach_adapter(struct i2c_adapter *adapter); -static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind); -static void adm9240_init_client(struct i2c_client *client); -static int adm9240_detach_client(struct i2c_client *client); -static struct adm9240_data *adm9240_update_device(struct device *dev); - -/* driver data */ -static struct i2c_driver adm9240_driver = { - .owner = THIS_MODULE, - .name = "adm9240", - .id = I2C_DRIVERID_ADM9240, - .flags = I2C_DF_NOTIFY, - .attach_adapter = adm9240_attach_adapter, - .detach_client = adm9240_detach_client, -}; - -/* per client data */ -struct adm9240_data { - enum chips type; - struct i2c_client client; - struct semaphore update_lock; - char valid; - unsigned long last_updated_measure; - unsigned long last_updated_config; - - u8 in[6]; /* ro in0_input */ - u8 in_max[6]; /* rw in0_max */ - u8 in_min[6]; /* rw in0_min */ - u8 fan[2]; /* ro fan1_input */ - u8 fan_min[2]; /* rw fan1_min */ - u8 fan_div[2]; /* rw fan1_div, read-only accessor */ - s16 temp; /* ro temp1_input, 9-bit sign-extended */ - s8 temp_high; /* rw temp1_max */ - s8 temp_hyst; /* rw temp1_max_hyst */ - u16 alarms; /* ro alarms */ - u8 aout; /* rw aout_output */ - u8 vid; /* ro vid */ - u8 vrm; /* -- vrm set on startup, no accessor */ -}; - -/* i2c byte read/write interface */ -static int adm9240_read_value(struct i2c_client *client, u8 reg) -{ - return i2c_smbus_read_byte_data(client, reg); -} - -static int adm9240_write_value(struct i2c_client *client, u8 reg, u8 value) -{ - return i2c_smbus_write_byte_data(client, reg, value); -} - -/*** sysfs accessors ***/ - -/* temperature */ -#define show_temp(value, scale) \ -static ssize_t show_##value(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - struct adm9240_data *data = adm9240_update_device(dev); \ - return sprintf(buf, "%d\n", data->value * scale); \ -} -show_temp(temp_high, 1000); -show_temp(temp_hyst, 1000); -show_temp(temp, 500); /* 0.5'C per bit */ - -#define set_temp(value, reg) \ -static ssize_t set_##value(struct device *dev, \ - struct device_attribute *attr, \ - const char *buf, size_t count) \ -{ \ - struct i2c_client *client = to_i2c_client(dev); \ - struct adm9240_data *data = adm9240_update_device(dev); \ - long temp = simple_strtoul(buf, NULL, 10); \ - \ - down(&data->update_lock); \ - data->value = TEMP_TO_REG(temp); \ - adm9240_write_value(client, reg, data->value); \ - up(&data->update_lock); \ - return count; \ -} - -set_temp(temp_high, ADM9240_REG_TEMP_HIGH); -set_temp(temp_hyst, ADM9240_REG_TEMP_HYST); - -static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, - show_temp_high, set_temp_high); -static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, - show_temp_hyst, set_temp_hyst); -static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); - -/* voltage */ -static ssize_t show_in(struct device *dev, char *buf, int nr) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); -} - -static ssize_t show_in_min(struct device *dev, char *buf, int nr) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); -} - -static ssize_t show_in_max(struct device *dev, char *buf, int nr) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); -} - -static ssize_t set_in_min(struct device *dev, const char *buf, - size_t count, int nr) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adm9240_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); - - down(&data->update_lock); - data->in_min[nr] = IN_TO_REG(val, nr); - adm9240_write_value(client, ADM9240_REG_IN_MIN(nr), data->in_min[nr]); - up(&data->update_lock); - return count; -} - -static ssize_t set_in_max(struct device *dev, const char *buf, - size_t count, int nr) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adm9240_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); - - down(&data->update_lock); - data->in_max[nr] = IN_TO_REG(val, nr); - adm9240_write_value(client, ADM9240_REG_IN_MAX(nr), data->in_max[nr]); - up(&data->update_lock); - return count; -} - -#define show_in_offset(offset) \ -static ssize_t show_in##offset(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - return show_in(dev, buf, offset); \ -} \ -static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); \ -static ssize_t show_in##offset##_min(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - return show_in_min(dev, buf, offset); \ -} \ -static ssize_t show_in##offset##_max(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - return show_in_max(dev, buf, offset); \ -} \ -static ssize_t \ -set_in##offset##_min(struct device *dev, \ - struct device_attribute *attr, const char *buf, \ - size_t count) \ -{ \ - return set_in_min(dev, buf, count, offset); \ -} \ -static ssize_t \ -set_in##offset##_max(struct device *dev, \ - struct device_attribute *attr, const char *buf, \ - size_t count) \ -{ \ - return set_in_max(dev, buf, count, offset); \ -} \ -static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ - show_in##offset##_min, set_in##offset##_min); \ -static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ - show_in##offset##_max, set_in##offset##_max); - -show_in_offset(0); -show_in_offset(1); -show_in_offset(2); -show_in_offset(3); -show_in_offset(4); -show_in_offset(5); - -/* fans */ -static ssize_t show_fan(struct device *dev, char *buf, int nr) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], - 1 << data->fan_div[nr])); -} - -static ssize_t show_fan_min(struct device *dev, char *buf, int nr) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], - 1 << data->fan_div[nr])); -} - -static ssize_t show_fan_div(struct device *dev, char *buf, int nr) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", 1 << data->fan_div[nr]); -} - -/* write new fan div, callers must hold data->update_lock */ -static void adm9240_write_fan_div(struct i2c_client *client, int nr, - u8 fan_div) -{ - u8 reg, old, shift = (nr + 2) * 2; - - reg = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); - old = (reg >> shift) & 3; - reg &= ~(3 << shift); - reg |= (fan_div << shift); - adm9240_write_value(client, ADM9240_REG_VID_FAN_DIV, reg); - dev_dbg(&client->dev, "fan%d clock divider changed from %u " - "to %u\n", nr + 1, 1 << old, 1 << fan_div); -} - -/* - * set fan speed low limit: - * - * - value is zero: disable fan speed low limit alarm - * - * - value is below fan speed measurement range: enable fan speed low - * limit alarm to be asserted while fan speed too slow to measure - * - * - otherwise: select fan clock divider to suit fan speed low limit, - * measurement code may adjust registers to ensure fan speed reading - */ -static ssize_t set_fan_min(struct device *dev, const char *buf, - size_t count, int nr) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adm9240_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); - u8 new_div; - - down(&data->update_lock); - - if (!val) { - data->fan_min[nr] = 255; - new_div = data->fan_div[nr]; - - dev_dbg(&client->dev, "fan%u low limit set disabled\n", - nr + 1); - - } else if (val < 1350000 / (8 * 254)) { - new_div = 3; - data->fan_min[nr] = 254; - - dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", - nr + 1, FAN_FROM_REG(254, 1 << new_div)); - - } else { - unsigned int new_min = 1350000 / val; - - new_div = 0; - while (new_min > 192 && new_div < 3) { - new_div++; - new_min /= 2; - } - if (!new_min) /* keep > 0 */ - new_min++; - - data->fan_min[nr] = new_min; - - dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", - nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); - } - - if (new_div != data->fan_div[nr]) { - data->fan_div[nr] = new_div; - adm9240_write_fan_div(client, nr, new_div); - } - adm9240_write_value(client, ADM9240_REG_FAN_MIN(nr), - data->fan_min[nr]); - - up(&data->update_lock); - return count; -} - -#define show_fan_offset(offset) \ -static ssize_t show_fan_##offset (struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ -return show_fan(dev, buf, offset - 1); \ -} \ -static ssize_t show_fan_##offset##_div (struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ -return show_fan_div(dev, buf, offset - 1); \ -} \ -static ssize_t show_fan_##offset##_min (struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ -return show_fan_min(dev, buf, offset - 1); \ -} \ -static ssize_t set_fan_##offset##_min (struct device *dev, \ - struct device_attribute *attr, \ - const char *buf, size_t count) \ -{ \ -return set_fan_min(dev, buf, count, offset - 1); \ -} \ -static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ - show_fan_##offset, NULL); \ -static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \ - show_fan_##offset##_div, NULL); \ -static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ - show_fan_##offset##_min, set_fan_##offset##_min); - -show_fan_offset(1); -show_fan_offset(2); - -/* alarms */ -static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%u\n", data->alarms); -} -static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); - -/* vid */ -static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); -} -static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); - -/* analog output */ -static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct adm9240_data *data = adm9240_update_device(dev); - return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); -} - -static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adm9240_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtol(buf, NULL, 10); - - down(&data->update_lock); - data->aout = AOUT_TO_REG(val); - adm9240_write_value(client, ADM9240_REG_ANALOG_OUT, data->aout); - up(&data->update_lock); - return count; -} -static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); - -/* chassis_clear */ -static ssize_t chassis_clear(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - unsigned long val = simple_strtol(buf, NULL, 10); - - if (val == 1) { - adm9240_write_value(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); - dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); - } - return count; -} -static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); - - -/*** sensor chip detect and driver install ***/ - -static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) -{ - struct i2c_client *new_client; - struct adm9240_data *data; - int err = 0; - const char *name = ""; - u8 man_id, die_rev; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - goto exit; - - if (!(data = kmalloc(sizeof(struct adm9240_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - memset(data, 0, sizeof(struct adm9240_data)); - - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &adm9240_driver; - new_client->flags = 0; - - if (kind == 0) { - kind = adm9240; - } - - if (kind < 0) { - - /* verify chip: reg address should match i2c address */ - if (adm9240_read_value(new_client, ADM9240_REG_I2C_ADDR) - != address) { - dev_err(&adapter->dev, "detect fail: address match, " - "0x%02x\n", address); - goto exit_free; - } - - /* check known chip manufacturer */ - man_id = adm9240_read_value(new_client, ADM9240_REG_MAN_ID); - - if (man_id == 0x23) { - kind = adm9240; - } else if (man_id == 0xda) { - kind = ds1780; - } else if (man_id == 0x01) { - kind = lm81; - } else { - dev_err(&adapter->dev, "detect fail: unknown manuf, " - "0x%02x\n", man_id); - goto exit_free; - } - - /* successful detect, print chip info */ - die_rev = adm9240_read_value(new_client, ADM9240_REG_DIE_REV); - dev_info(&adapter->dev, "found %s revision %u\n", - man_id == 0x23 ? "ADM9240" : - man_id == 0xda ? "DS1780" : "LM81", die_rev); - } - - /* either forced or detected chip kind */ - if (kind == adm9240) { - name = "adm9240"; - } else if (kind == ds1780) { - name = "ds1780"; - } else if (kind == lm81) { - name = "lm81"; - } - - /* fill in the remaining client fields and attach */ - strlcpy(new_client->name, name, I2C_NAME_SIZE); - data->type = kind; - init_MUTEX(&data->update_lock); - - if ((err = i2c_attach_client(new_client))) - goto exit_free; - - adm9240_init_client(new_client); - - /* populate sysfs filesystem */ - device_create_file(&new_client->dev, &dev_attr_in0_input); - device_create_file(&new_client->dev, &dev_attr_in0_min); - device_create_file(&new_client->dev, &dev_attr_in0_max); - device_create_file(&new_client->dev, &dev_attr_in1_input); - device_create_file(&new_client->dev, &dev_attr_in1_min); - device_create_file(&new_client->dev, &dev_attr_in1_max); - device_create_file(&new_client->dev, &dev_attr_in2_input); - device_create_file(&new_client->dev, &dev_attr_in2_min); - device_create_file(&new_client->dev, &dev_attr_in2_max); - device_create_file(&new_client->dev, &dev_attr_in3_input); - device_create_file(&new_client->dev, &dev_attr_in3_min); - device_create_file(&new_client->dev, &dev_attr_in3_max); - device_create_file(&new_client->dev, &dev_attr_in4_input); - device_create_file(&new_client->dev, &dev_attr_in4_min); - device_create_file(&new_client->dev, &dev_attr_in4_max); - device_create_file(&new_client->dev, &dev_attr_in5_input); - device_create_file(&new_client->dev, &dev_attr_in5_min); - device_create_file(&new_client->dev, &dev_attr_in5_max); - device_create_file(&new_client->dev, &dev_attr_temp1_max); - device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); - device_create_file(&new_client->dev, &dev_attr_temp1_input); - device_create_file(&new_client->dev, &dev_attr_fan1_input); - device_create_file(&new_client->dev, &dev_attr_fan1_div); - device_create_file(&new_client->dev, &dev_attr_fan1_min); - device_create_file(&new_client->dev, &dev_attr_fan2_input); - device_create_file(&new_client->dev, &dev_attr_fan2_div); - device_create_file(&new_client->dev, &dev_attr_fan2_min); - device_create_file(&new_client->dev, &dev_attr_alarms); - device_create_file(&new_client->dev, &dev_attr_aout_output); - device_create_file(&new_client->dev, &dev_attr_chassis_clear); - device_create_file(&new_client->dev, &dev_attr_cpu0_vid); - - return 0; -exit_free: - kfree(new_client); -exit: - return err; -} - -static int adm9240_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_detect(adapter, &addr_data, adm9240_detect); -} - -static int adm9240_detach_client(struct i2c_client *client) -{ - int err; - - if ((err = i2c_detach_client(client))) { - dev_err(&client->dev, "Client deregistration failed, " - "client not detached.\n"); - return err; - } - - kfree(i2c_get_clientdata(client)); - return 0; -} - -static void adm9240_init_client(struct i2c_client *client) -{ - struct adm9240_data *data = i2c_get_clientdata(client); - u8 conf = adm9240_read_value(client, ADM9240_REG_CONFIG); - u8 mode = adm9240_read_value(client, ADM9240_REG_TEMP_CONF) & 3; - - data->vrm = i2c_which_vrm(); /* need this to report vid as mV */ - - dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, - data->vrm % 10); - - if (conf & 1) { /* measurement cycle running: report state */ - - dev_info(&client->dev, "status: config 0x%02x mode %u\n", - conf, mode); - - } else { /* cold start: open limits before starting chip */ - int i; - - for (i = 0; i < 6; i++) - { - adm9240_write_value(client, - ADM9240_REG_IN_MIN(i), 0); - adm9240_write_value(client, - ADM9240_REG_IN_MAX(i), 255); - } - adm9240_write_value(client, ADM9240_REG_FAN_MIN(0), 255); - adm9240_write_value(client, ADM9240_REG_FAN_MIN(1), 255); - adm9240_write_value(client, ADM9240_REG_TEMP_HIGH, 127); - adm9240_write_value(client, ADM9240_REG_TEMP_HYST, 127); - - /* start measurement cycle */ - adm9240_write_value(client, ADM9240_REG_CONFIG, 1); - - dev_info(&client->dev, "cold start: config was 0x%02x " - "mode %u\n", conf, mode); - } -} - -static struct adm9240_data *adm9240_update_device(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adm9240_data *data = i2c_get_clientdata(client); - int i; - - down(&data->update_lock); - - /* minimum measurement cycle: 1.75 seconds */ - if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) - || !data->valid) { - - for (i = 0; i < 6; i++) /* read voltages */ - { - data->in[i] = adm9240_read_value(client, - ADM9240_REG_IN(i)); - } - data->alarms = adm9240_read_value(client, - ADM9240_REG_INT(0)) | - adm9240_read_value(client, - ADM9240_REG_INT(1)) << 8; - - /* read temperature: assume temperature changes less than - * 0.5'C per two measurement cycles thus ignore possible - * but unlikely aliasing error on lsb reading. --Grant */ - data->temp = ((adm9240_read_value(client, - ADM9240_REG_TEMP) << 8) | - adm9240_read_value(client, - ADM9240_REG_TEMP_CONF)) / 128; - - for (i = 0; i < 2; i++) /* read fans */ - { - data->fan[i] = adm9240_read_value(client, - ADM9240_REG_FAN(i)); - - /* adjust fan clock divider on overflow */ - if (data->valid && data->fan[i] == 255 && - data->fan_div[i] < 3) { - - adm9240_write_fan_div(client, i, - ++data->fan_div[i]); - - /* adjust fan_min if active, but not to 0 */ - if (data->fan_min[i] < 255 && - data->fan_min[i] >= 2) - data->fan_min[i] /= 2; - } - } - data->last_updated_measure = jiffies; - } - - /* minimum config reading cycle: 300 seconds */ - if (time_after(jiffies, data->last_updated_config + (HZ * 300)) - || !data->valid) { - - for (i = 0; i < 6; i++) - { - data->in_min[i] = adm9240_read_value(client, - ADM9240_REG_IN_MIN(i)); - data->in_max[i] = adm9240_read_value(client, - ADM9240_REG_IN_MAX(i)); - } - for (i = 0; i < 2; i++) - { - data->fan_min[i] = adm9240_read_value(client, - ADM9240_REG_FAN_MIN(i)); - } - data->temp_high = adm9240_read_value(client, - ADM9240_REG_TEMP_HIGH); - data->temp_hyst = adm9240_read_value(client, - ADM9240_REG_TEMP_HYST); - - /* read fan divs and 5-bit VID */ - i = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); - data->fan_div[0] = (i >> 4) & 3; - data->fan_div[1] = (i >> 6) & 3; - data->vid = i & 0x0f; - data->vid |= (adm9240_read_value(client, - ADM9240_REG_VID4) & 1) << 4; - /* read analog out */ - data->aout = adm9240_read_value(client, - ADM9240_REG_ANALOG_OUT); - - data->last_updated_config = jiffies; - data->valid = 1; - } - up(&data->update_lock); - return data; -} - -static int __init sensors_adm9240_init(void) -{ - return i2c_add_driver(&adm9240_driver); -} - -static void __exit sensors_adm9240_exit(void) -{ - i2c_del_driver(&adm9240_driver); -} - -MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " - "Grant Coady <gcoady@gmail.com> and others"); -MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); -MODULE_LICENSE("GPL"); - -module_init(sensors_adm9240_init); -module_exit(sensors_adm9240_exit); - |