// SPDX-License-Identifier: GPL-2.0-or-later /* * amc6821.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring * Copyright (C) 2009 T. Mertelj <tomaz.mertelj@guest.arnes.si> * * Based on max6650.c: * Copyright (C) 2007 Hans J. Koch <hjk@hansjkoch.de> */ #include <linux/kernel.h> /* Needed for KERN_INFO */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> /* * Addresses to scan. */ static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END}; /* * Insmod parameters */ static int pwminv; /*Inverted PWM output. */ module_param(pwminv, int, 0444); static int init = 1; /*Power-on initialization.*/ module_param(init, int, 0444); enum chips { amc6821 }; #define AMC6821_REG_DEV_ID 0x3D #define AMC6821_REG_COMP_ID 0x3E #define AMC6821_REG_CONF1 0x00 #define AMC6821_REG_CONF2 0x01 #define AMC6821_REG_CONF3 0x3F #define AMC6821_REG_CONF4 0x04 #define AMC6821_REG_STAT1 0x02 #define AMC6821_REG_STAT2 0x03 #define AMC6821_REG_TDATA_LOW 0x08 #define AMC6821_REG_TDATA_HI 0x09 #define AMC6821_REG_LTEMP_HI 0x0A #define AMC6821_REG_RTEMP_HI 0x0B #define AMC6821_REG_LTEMP_LIMIT_MIN 0x15 #define AMC6821_REG_LTEMP_LIMIT_MAX 0x14 #define AMC6821_REG_RTEMP_LIMIT_MIN 0x19 #define AMC6821_REG_RTEMP_LIMIT_MAX 0x18 #define AMC6821_REG_LTEMP_CRIT 0x1B #define AMC6821_REG_RTEMP_CRIT 0x1D #define AMC6821_REG_PSV_TEMP 0x1C #define AMC6821_REG_DCY 0x22 #define AMC6821_REG_LTEMP_FAN_CTRL 0x24 #define AMC6821_REG_RTEMP_FAN_CTRL 0x25 #define AMC6821_REG_DCY_LOW_TEMP 0x21 #define AMC6821_REG_TACH_LLIMITL 0x10 #define AMC6821_REG_TACH_LLIMITH 0x11 #define AMC6821_REG_TACH_HLIMITL 0x12 #define AMC6821_REG_TACH_HLIMITH 0x13 #define AMC6821_CONF1_START 0x01 #define AMC6821_CONF1_FAN_INT_EN 0x02 #define AMC6821_CONF1_FANIE 0x04 #define AMC6821_CONF1_PWMINV 0x08 #define AMC6821_CONF1_FAN_FAULT_EN 0x10 #define AMC6821_CONF1_FDRC0 0x20 #define AMC6821_CONF1_FDRC1 0x40 #define AMC6821_CONF1_THERMOVIE 0x80 #define AMC6821_CONF2_PWM_EN 0x01 #define AMC6821_CONF2_TACH_MODE 0x02 #define AMC6821_CONF2_TACH_EN 0x04 #define AMC6821_CONF2_RTFIE 0x08 #define AMC6821_CONF2_LTOIE 0x10 #define AMC6821_CONF2_RTOIE 0x20 #define AMC6821_CONF2_PSVIE 0x40 #define AMC6821_CONF2_RST 0x80 #define AMC6821_CONF3_THERM_FAN_EN 0x80 #define AMC6821_CONF3_REV_MASK 0x0F #define AMC6821_CONF4_OVREN 0x10 #define AMC6821_CONF4_TACH_FAST 0x20 #define AMC6821_CONF4_PSPR 0x40 #define AMC6821_CONF4_MODE 0x80 #define AMC6821_STAT1_RPM_ALARM 0x01 #define AMC6821_STAT1_FANS 0x02 #define AMC6821_STAT1_RTH 0x04 #define AMC6821_STAT1_RTL 0x08 #define AMC6821_STAT1_R_THERM 0x10 #define AMC6821_STAT1_RTF 0x20 #define AMC6821_STAT1_LTH 0x40 #define AMC6821_STAT1_LTL 0x80 #define AMC6821_STAT2_RTC 0x08 #define AMC6821_STAT2_LTC 0x10 #define AMC6821_STAT2_LPSV 0x20 #define AMC6821_STAT2_L_THERM 0x40 #define AMC6821_STAT2_THERM_IN 0x80 enum {IDX_TEMP1_INPUT = 0, IDX_TEMP1_MIN, IDX_TEMP1_MAX, IDX_TEMP1_CRIT, IDX_TEMP2_INPUT, IDX_TEMP2_MIN, IDX_TEMP2_MAX, IDX_TEMP2_CRIT, TEMP_IDX_LEN, }; static const u8 temp_reg[] = {AMC6821_REG_LTEMP_HI, AMC6821_REG_LTEMP_LIMIT_MIN, AMC6821_REG_LTEMP_LIMIT_MAX, AMC6821_REG_LTEMP_CRIT, AMC6821_REG_RTEMP_HI, AMC6821_REG_RTEMP_LIMIT_MIN, AMC6821_REG_RTEMP_LIMIT_MAX, AMC6821_REG_RTEMP_CRIT, }; enum {IDX_FAN1_INPUT = 0, IDX_FAN1_MIN, IDX_FAN1_MAX, FAN1_IDX_LEN, }; static const u8 fan_reg_low[] = {AMC6821_REG_TDATA_LOW, AMC6821_REG_TACH_LLIMITL, AMC6821_REG_TACH_HLIMITL, }; static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI, AMC6821_REG_TACH_LLIMITH, AMC6821_REG_TACH_HLIMITH, }; /* * Client data (each client gets its own) */ struct amc6821_data { struct i2c_client *client; struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ /* register values */ int temp[TEMP_IDX_LEN]; u16 fan[FAN1_IDX_LEN]; u8 fan1_div; u8 pwm1; u8 temp1_auto_point_temp[3]; u8 temp2_auto_point_temp[3]; u8 pwm1_auto_point_pwm[3]; u8 pwm1_enable; u8 pwm1_auto_channels_temp; u8 stat1; u8 stat2; }; static struct amc6821_data *amc6821_update_device(struct device *dev) { struct amc6821_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; int timeout = HZ; u8 reg; int i; mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + timeout) || !data->valid) { for (i = 0; i < TEMP_IDX_LEN; i++) data->temp[i] = (int8_t)i2c_smbus_read_byte_data( client, temp_reg[i]); data->stat1 = i2c_smbus_read_byte_data(client, AMC6821_REG_STAT1); data->stat2 = i2c_smbus_read_byte_data(client, AMC6821_REG_STAT2); data->pwm1 = i2c_smbus_read_byte_data(client, AMC6821_REG_DCY); for (i = 0; i < FAN1_IDX_LEN; i++) { data->fan[i] = i2c_smbus_read_byte_data( client, fan_reg_low[i]); data->fan[i] += i2c_smbus_read_byte_data( client, fan_reg_hi[i]) << 8; } data->fan1_div = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2; data->pwm1_auto_point_pwm[0] = 0; data->pwm1_auto_point_pwm[2] = 255; data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client, AMC6821_REG_DCY_LOW_TEMP); data->temp1_auto_point_temp[0] = i2c_smbus_read_byte_data(client, AMC6821_REG_PSV_TEMP); data->temp2_auto_point_temp[0] = data->temp1_auto_point_temp[0]; reg = i2c_smbus_read_byte_data(client, AMC6821_REG_LTEMP_FAN_CTRL); data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1; reg &= 0x07; reg = 0x20 >> reg; if (reg > 0) data->temp1_auto_point_temp[2] = data->temp1_auto_point_temp[1] + (data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]) / reg; else data->temp1_auto_point_temp[2] = 255; reg = i2c_smbus_read_byte_data(client, AMC6821_REG_RTEMP_FAN_CTRL); data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1; reg &= 0x07; reg = 0x20 >> reg; if (reg > 0) data->temp2_auto_point_temp[2] = data->temp2_auto_point_temp[1] + (data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]) / reg; else data->temp2_auto_point_temp[2] = 255; reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); reg = (reg >> 5) & 0x3; switch (reg) { case 0: /*open loop: software sets pwm1*/ data->pwm1_auto_channels_temp = 0; data->pwm1_enable = 1; break; case 2: /*closed loop: remote T (temp2)*/ data->pwm1_auto_channels_temp = 2; data->pwm1_enable = 2; break; case 3: /*closed loop: local and remote T (temp2)*/ data->pwm1_auto_channels_temp = 3; data->pwm1_enable = 3; break; case 1: /* * semi-open loop: software sets rpm, chip controls * pwm1, currently not implemented */ data->pwm1_auto_channels_temp = 0; data->pwm1_enable = 0; break; } data->last_updated = jiffies; data->valid = 1; } mutex_unlock(&data->update_lock); return data; } static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); int ix = to_sensor_dev_attr(devattr)->index; return sprintf(buf, "%d\n", data->temp[ix] * 1000); } static ssize_t temp_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct amc6821_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; int ix = to_sensor_dev_attr(attr)->index; long val; int ret = kstrtol(buf, 10, &val); if (ret) return ret; val = clamp_val(val / 1000, -128, 127); mutex_lock(&data->update_lock); data->temp[ix] = val; if (i2c_smbus_write_byte_data(client, temp_reg[ix], data->temp[ix])) { dev_err(&client->dev, "Register write error, aborting.\n"); count = -EIO; } mutex_unlock(&data->update_lock); return count; } static ssize_t temp_alarm_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); int ix = to_sensor_dev_attr(devattr)->index; u8 flag; switch (ix) { case IDX_TEMP1_MIN: flag = data->stat1 & AMC6821_STAT1_LTL; break; case IDX_TEMP1_MAX: flag = data->stat1 & AMC6821_STAT1_LTH; break; case IDX_TEMP1_CRIT: flag = data->stat2 & AMC6821_STAT2_LTC; break; case IDX_TEMP2_MIN: flag = data->stat1 & AMC6821_STAT1_RTL; break; case IDX_TEMP2_MAX: flag = data->stat1 & AMC6821_STAT1_RTH; break; case IDX_TEMP2_CRIT: flag = data->stat2 & AMC6821_STAT2_RTC; break; default: dev_dbg(dev, "Unknown attr->index (%d).\n", ix); return -EINVAL; } if (flag) return sprintf(buf, "1"); else return sprintf(buf, "0"); } static ssize_t temp2_fault_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); if (data->stat1 & AMC6821_STAT1_RTF) return sprintf(buf, "1"); else return sprintf(buf, "0"); } static ssize_t pwm1_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); return sprintf(buf, "%d\n", data->pwm1); } static ssize_t pwm1_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct amc6821_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int ret = kstrtol(buf, 10, &val); if (ret) return ret; mutex_lock(&data->update_lock); data->pwm1 = clamp_val(val , 0, 255); i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, data->pwm1); mutex_unlock(&data->update_lock); return count; } static ssize_t pwm1_enable_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); return sprintf(buf, "%d\n", data->pwm1_enable); } static ssize_t pwm1_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct amc6821_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int config = kstrtol(buf, 10, &val); if (config) return config; mutex_lock(&data->update_lock); config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); count = config; goto unlock; } switch (val) { case 1: config &= ~AMC6821_CONF1_FDRC0; config &= ~AMC6821_CONF1_FDRC1; break; case 2: config &= ~AMC6821_CONF1_FDRC0; config |= AMC6821_CONF1_FDRC1; break; case 3: config |= AMC6821_CONF1_FDRC0; config |= AMC6821_CONF1_FDRC1; break; default: count = -EINVAL; goto unlock; } if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) { dev_err(&client->dev, "Configuration register write error, aborting.\n"); count = -EIO; } unlock: mutex_unlock(&data->update_lock); return count; } static ssize_t pwm1_auto_channels_temp_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp); } static ssize_t temp_auto_point_temp_show(struct device *dev, struct device_attribute *devattr, char *buf) { int ix = to_sensor_dev_attr_2(devattr)->index; int nr = to_sensor_dev_attr_2(devattr)->nr; struct amc6821_data *data = amc6821_update_device(dev); switch (nr) { case 1: return sprintf(buf, "%d\n", data->temp1_auto_point_temp[ix] * 1000); case 2: return sprintf(buf, "%d\n", data->temp2_auto_point_temp[ix] * 1000); default: dev_dbg(dev, "Unknown attr->nr (%d).\n", nr); return -EINVAL; } } static ssize_t pwm1_auto_point_pwm_show(struct device *dev, struct device_attribute *devattr, char *buf) { int ix = to_sensor_dev_attr(devattr)->index; struct amc6821_data *data = amc6821_update_device(dev); return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[ix]); } static inline ssize_t set_slope_register(struct i2c_client *client, u8 reg, u8 dpwm, u8 *ptemp) { int dt; u8 tmp; dt = ptemp[2]-ptemp[1]; for (tmp = 4; tmp > 0; tmp--) { if (dt * (0x20 >> tmp) >= dpwm) break; } tmp |= (ptemp[1] & 0x7C) << 1; if (i2c_smbus_write_byte_data(client, reg, tmp)) { dev_err(&client->dev, "Register write error, aborting.\n"); return -EIO; } return 0; } static ssize_t temp_auto_point_temp_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct amc6821_data *data = amc6821_update_device(dev); struct i2c_client *client = data->client; int ix = to_sensor_dev_attr_2(attr)->index; int nr = to_sensor_dev_attr_2(attr)->nr; u8 *ptemp; u8 reg; int dpwm; long val; int ret = kstrtol(buf, 10, &val); if (ret) return ret; switch (nr) { case 1: ptemp = data->temp1_auto_point_temp; reg = AMC6821_REG_LTEMP_FAN_CTRL; break; case 2: ptemp = data->temp2_auto_point_temp; reg = AMC6821_REG_RTEMP_FAN_CTRL; break; default: dev_dbg(dev, "Unknown attr->nr (%d).\n", nr); return -EINVAL; } mutex_lock(&data->update_lock); data->valid = 0; switch (ix) { case 0: ptemp[0] = clamp_val(val / 1000, 0, data->temp1_auto_point_temp[1]); ptemp[0] = clamp_val(ptemp[0], 0, data->temp2_auto_point_temp[1]); ptemp[0] = clamp_val(ptemp[0], 0, 63); if (i2c_smbus_write_byte_data( client, AMC6821_REG_PSV_TEMP, ptemp[0])) { dev_err(&client->dev, "Register write error, aborting.\n"); count = -EIO; } goto EXIT; case 1: ptemp[1] = clamp_val(val / 1000, (ptemp[0] & 0x7C) + 4, 124); ptemp[1] &= 0x7C; ptemp[2] = clamp_val(ptemp[2], ptemp[1] + 1, 255); break; case 2: ptemp[2] = clamp_val(val / 1000, ptemp[1]+1, 255); break; default: dev_dbg(dev, "Unknown attr->index (%d).\n", ix); count = -EINVAL; goto EXIT; } dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; if (set_slope_register(client, reg, dpwm, ptemp)) count = -EIO; EXIT: mutex_unlock(&data->update_lock); return count; } static ssize_t pwm1_auto_point_pwm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct amc6821_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; int dpwm; long val; int ret = kstrtol(buf, 10, &val); if (ret) return ret; mutex_lock(&data->update_lock); data->pwm1_auto_point_pwm[1] = clamp_val(val, 0, 254); if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP, data->pwm1_auto_point_pwm[1])) { dev_err(&client->dev, "Register write error, aborting.\n"); count = -EIO; goto EXIT; } dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; if (set_slope_register(client, AMC6821_REG_LTEMP_FAN_CTRL, dpwm, data->temp1_auto_point_temp)) { count = -EIO; goto EXIT; } if (set_slope_register(client, AMC6821_REG_RTEMP_FAN_CTRL, dpwm, data->temp2_auto_point_temp)) { count = -EIO; goto EXIT; } EXIT: data->valid = 0; mutex_unlock(&data->update_lock); return count; } static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); int ix = to_sensor_dev_attr(devattr)->index; if (0 == data->fan[ix]) return sprintf(buf, "0"); return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix])); } static ssize_t fan1_fault_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); if (data->stat1 & AMC6821_STAT1_FANS) return sprintf(buf, "1"); else return sprintf(buf, "0"); } static ssize_t fan_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct amc6821_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int ix = to_sensor_dev_attr(attr)->index; int ret = kstrtol(buf, 10, &val); if (ret) return ret; val = 1 > val ? 0xFFFF : 6000000/val; mutex_lock(&data->update_lock); data->fan[ix] = (u16) clamp_val(val, 1, 0xFFFF); if (i2c_smbus_write_byte_data(client, fan_reg_low[ix], data->fan[ix] & 0xFF)) { dev_err(&client->dev, "Register write error, aborting.\n"); count = -EIO; goto EXIT; } if (i2c_smbus_write_byte_data(client, fan_reg_hi[ix], data->fan[ix] >> 8)) { dev_err(&client->dev, "Register write error, aborting.\n"); count = -EIO; } EXIT: mutex_unlock(&data->update_lock); return count; } static ssize_t fan1_div_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct amc6821_data *data = amc6821_update_device(dev); return sprintf(buf, "%d\n", data->fan1_div); } static ssize_t fan1_div_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct amc6821_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int config = kstrtol(buf, 10, &val); if (config) return config; mutex_lock(&data->update_lock); config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); count = config; goto EXIT; } switch (val) { case 2: config &= ~AMC6821_CONF4_PSPR; data->fan1_div = 2; break; case 4: config |= AMC6821_CONF4_PSPR; data->fan1_div = 4; break; default: count = -EINVAL; goto EXIT; } if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) { dev_err(&client->dev, "Configuration register write error, aborting.\n"); count = -EIO; } EXIT: mutex_unlock(&data->update_lock); return count; } static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, IDX_TEMP1_INPUT); static SENSOR_DEVICE_ATTR_RW(temp1_min, temp, IDX_TEMP1_MIN); static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, IDX_TEMP1_MAX); static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp, IDX_TEMP1_CRIT); static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_alarm, IDX_TEMP1_MIN); static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_alarm, IDX_TEMP1_MAX); static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, temp_alarm, IDX_TEMP1_CRIT); static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, IDX_TEMP2_INPUT); static SENSOR_DEVICE_ATTR_RW(temp2_min, temp, IDX_TEMP2_MIN); static SENSOR_DEVICE_ATTR_RW(temp2_max, temp, IDX_TEMP2_MAX); static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp, IDX_TEMP2_CRIT); static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp2_fault, 0); static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_alarm, IDX_TEMP2_MIN); static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_alarm, IDX_TEMP2_MAX); static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, temp_alarm, IDX_TEMP2_CRIT); static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, IDX_FAN1_INPUT); static SENSOR_DEVICE_ATTR_RW(fan1_min, fan, IDX_FAN1_MIN); static SENSOR_DEVICE_ATTR_RW(fan1_max, fan, IDX_FAN1_MAX); static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan1_fault, 0); static SENSOR_DEVICE_ATTR_RW(fan1_div, fan1_div, 0); static SENSOR_DEVICE_ATTR_RW(pwm1, pwm1, 0); static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm1_enable, 0); static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point1_pwm, pwm1_auto_point_pwm, 0); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm1_auto_point_pwm, 1); static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point3_pwm, pwm1_auto_point_pwm, 2); static SENSOR_DEVICE_ATTR_RO(pwm1_auto_channels_temp, pwm1_auto_channels_temp, 0); static SENSOR_DEVICE_ATTR_2_RO(temp1_auto_point1_temp, temp_auto_point_temp, 1, 0); static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, temp_auto_point_temp, 1, 1); static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point3_temp, temp_auto_point_temp, 1, 2); static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp_auto_point_temp, 2, 0); static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, temp_auto_point_temp, 2, 1); static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point3_temp, temp_auto_point_temp, 2, 2); static struct attribute *amc6821_attrs[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_crit.dev_attr.attr, &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, &sensor_dev_attr_temp1_crit_alarm.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_crit.dev_attr.attr, &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan1_min.dev_attr.attr, &sensor_dev_attr_fan1_max.dev_attr.attr, &sensor_dev_attr_fan1_fault.dev_attr.attr, &sensor_dev_attr_fan1_div.dev_attr.attr, &sensor_dev_attr_pwm1.dev_attr.attr, &sensor_dev_attr_pwm1_enable.dev_attr.attr, &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr, &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr, NULL }; ATTRIBUTE_GROUPS(amc6821); /* Return 0 if detection is successful, -ENODEV otherwise */ static int amc6821_detect( struct i2c_client *client, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; int address = client->addr; int dev_id, comp_id; dev_dbg(&adapter->dev, "amc6821_detect called.\n"); if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_dbg(&adapter->dev, "amc6821: I2C bus doesn't support byte mode, " "skipping.\n"); return -ENODEV; } dev_id = i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID); comp_id = i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID); if (dev_id != 0x21 || comp_id != 0x49) { dev_dbg(&adapter->dev, "amc6821: detection failed at 0x%02x.\n", address); return -ENODEV; } /* * Bit 7 of the address register is ignored, so we can check the * ID registers again */ dev_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_DEV_ID); comp_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_COMP_ID); if (dev_id != 0x21 || comp_id != 0x49) { dev_dbg(&adapter->dev, "amc6821: detection failed at 0x%02x.\n", address); return -ENODEV; } dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n", address); strlcpy(info->type, "amc6821", I2C_NAME_SIZE); return 0; } static int amc6821_init_client(struct i2c_client *client) { int config; int err = -EIO; if (init) { config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); return err; } config |= AMC6821_CONF4_MODE; if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) { dev_err(&client->dev, "Configuration register write error, aborting.\n"); return err; } config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); return err; } dev_info(&client->dev, "Revision %d\n", config & 0x0f); config &= ~AMC6821_CONF3_THERM_FAN_EN; if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3, config)) { dev_err(&client->dev, "Configuration register write error, aborting.\n"); return err; } config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); return err; } config &= ~AMC6821_CONF2_RTFIE; config &= ~AMC6821_CONF2_LTOIE; config &= ~AMC6821_CONF2_RTOIE; if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF2, config)) { dev_err(&client->dev, "Configuration register write error, aborting.\n"); return err; } config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); return err; } config &= ~AMC6821_CONF1_THERMOVIE; config &= ~AMC6821_CONF1_FANIE; config |= AMC6821_CONF1_START; if (pwminv) config |= AMC6821_CONF1_PWMINV; else config &= ~AMC6821_CONF1_PWMINV; if (i2c_smbus_write_byte_data( client, AMC6821_REG_CONF1, config)) { dev_err(&client->dev, "Configuration register write error, aborting.\n"); return err; } } return 0; } static int amc6821_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct amc6821_data *data; struct device *hwmon_dev; int err; data = devm_kzalloc(dev, sizeof(struct amc6821_data), GFP_KERNEL); if (!data) return -ENOMEM; data->client = client; mutex_init(&data->update_lock); /* * Initialize the amc6821 chip */ err = amc6821_init_client(client); if (err) return err; hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, data, amc6821_groups); return PTR_ERR_OR_ZERO(hwmon_dev); } static const struct i2c_device_id amc6821_id[] = { { "amc6821", amc6821 }, { } }; MODULE_DEVICE_TABLE(i2c, amc6821_id); static struct i2c_driver amc6821_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "amc6821", }, .probe = amc6821_probe, .id_table = amc6821_id, .detect = amc6821_detect, .address_list = normal_i2c, }; module_i2c_driver(amc6821_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("T. Mertelj <tomaz.mertelj@guest.arnes.si>"); MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver");