174ba9207SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2502b5a01SGuenter Roeck /* 3502b5a01SGuenter Roeck * Driver for Lineage Compact Power Line series of power entry modules. 4502b5a01SGuenter Roeck * 5502b5a01SGuenter Roeck * Copyright (C) 2010, 2011 Ericsson AB. 6502b5a01SGuenter Roeck * 7502b5a01SGuenter Roeck * Documentation: 8502b5a01SGuenter Roeck * http://www.lineagepower.com/oem/pdf/CPLI2C.pdf 9502b5a01SGuenter Roeck */ 10502b5a01SGuenter Roeck 11502b5a01SGuenter Roeck #include <linux/kernel.h> 12502b5a01SGuenter Roeck #include <linux/module.h> 13502b5a01SGuenter Roeck #include <linux/init.h> 14502b5a01SGuenter Roeck #include <linux/err.h> 15502b5a01SGuenter Roeck #include <linux/slab.h> 16502b5a01SGuenter Roeck #include <linux/i2c.h> 17502b5a01SGuenter Roeck #include <linux/hwmon.h> 18502b5a01SGuenter Roeck #include <linux/hwmon-sysfs.h> 19dcd8f392SJean Delvare #include <linux/jiffies.h> 20502b5a01SGuenter Roeck 21502b5a01SGuenter Roeck /* 22502b5a01SGuenter Roeck * This driver supports various Lineage Compact Power Line DC/DC and AC/DC 23502b5a01SGuenter Roeck * converters such as CP1800, CP2000AC, CP2000DC, CP2100DC, and others. 24502b5a01SGuenter Roeck * 25502b5a01SGuenter Roeck * The devices are nominally PMBus compliant. However, most standard PMBus 26502b5a01SGuenter Roeck * commands are not supported. Specifically, all hardware monitoring and 27502b5a01SGuenter Roeck * status reporting commands are non-standard. For this reason, a standard 28502b5a01SGuenter Roeck * PMBus driver can not be used. 29502b5a01SGuenter Roeck * 30502b5a01SGuenter Roeck * All Lineage CPL devices have a built-in I2C bus master selector (PCA9541). 31502b5a01SGuenter Roeck * To ensure device access, this driver should only be used as client driver 32502b5a01SGuenter Roeck * to the pca9541 I2C master selector driver. 33502b5a01SGuenter Roeck */ 34502b5a01SGuenter Roeck 35502b5a01SGuenter Roeck /* Command codes */ 36502b5a01SGuenter Roeck #define PEM_OPERATION 0x01 37502b5a01SGuenter Roeck #define PEM_CLEAR_INFO_FLAGS 0x03 38502b5a01SGuenter Roeck #define PEM_VOUT_COMMAND 0x21 39502b5a01SGuenter Roeck #define PEM_VOUT_OV_FAULT_LIMIT 0x40 40502b5a01SGuenter Roeck #define PEM_READ_DATA_STRING 0xd0 41502b5a01SGuenter Roeck #define PEM_READ_INPUT_STRING 0xdc 42502b5a01SGuenter Roeck #define PEM_READ_FIRMWARE_REV 0xdd 43502b5a01SGuenter Roeck #define PEM_READ_RUN_TIMER 0xde 44502b5a01SGuenter Roeck #define PEM_FAN_HI_SPEED 0xdf 45502b5a01SGuenter Roeck #define PEM_FAN_NORMAL_SPEED 0xe0 46502b5a01SGuenter Roeck #define PEM_READ_FAN_SPEED 0xe1 47502b5a01SGuenter Roeck 48502b5a01SGuenter Roeck /* offsets in data string */ 49502b5a01SGuenter Roeck #define PEM_DATA_STATUS_2 0 50502b5a01SGuenter Roeck #define PEM_DATA_STATUS_1 1 51502b5a01SGuenter Roeck #define PEM_DATA_ALARM_2 2 52502b5a01SGuenter Roeck #define PEM_DATA_ALARM_1 3 53502b5a01SGuenter Roeck #define PEM_DATA_VOUT_LSB 4 54502b5a01SGuenter Roeck #define PEM_DATA_VOUT_MSB 5 55502b5a01SGuenter Roeck #define PEM_DATA_CURRENT 6 56502b5a01SGuenter Roeck #define PEM_DATA_TEMP 7 57502b5a01SGuenter Roeck 58502b5a01SGuenter Roeck /* Virtual entries, to report constants */ 59502b5a01SGuenter Roeck #define PEM_DATA_TEMP_MAX 10 60502b5a01SGuenter Roeck #define PEM_DATA_TEMP_CRIT 11 61502b5a01SGuenter Roeck 62502b5a01SGuenter Roeck /* offsets in input string */ 63502b5a01SGuenter Roeck #define PEM_INPUT_VOLTAGE 0 64502b5a01SGuenter Roeck #define PEM_INPUT_POWER_LSB 1 65502b5a01SGuenter Roeck #define PEM_INPUT_POWER_MSB 2 66502b5a01SGuenter Roeck 67502b5a01SGuenter Roeck /* offsets in fan data */ 68502b5a01SGuenter Roeck #define PEM_FAN_ADJUSTMENT 0 69502b5a01SGuenter Roeck #define PEM_FAN_FAN1 1 70502b5a01SGuenter Roeck #define PEM_FAN_FAN2 2 71502b5a01SGuenter Roeck #define PEM_FAN_FAN3 3 72502b5a01SGuenter Roeck 73502b5a01SGuenter Roeck /* Status register bits */ 74502b5a01SGuenter Roeck #define STS1_OUTPUT_ON (1 << 0) 75502b5a01SGuenter Roeck #define STS1_LEDS_FLASHING (1 << 1) 76502b5a01SGuenter Roeck #define STS1_EXT_FAULT (1 << 2) 77502b5a01SGuenter Roeck #define STS1_SERVICE_LED_ON (1 << 3) 78502b5a01SGuenter Roeck #define STS1_SHUTDOWN_OCCURRED (1 << 4) 79502b5a01SGuenter Roeck #define STS1_INT_FAULT (1 << 5) 80502b5a01SGuenter Roeck #define STS1_ISOLATION_TEST_OK (1 << 6) 81502b5a01SGuenter Roeck 82502b5a01SGuenter Roeck #define STS2_ENABLE_PIN_HI (1 << 0) 83502b5a01SGuenter Roeck #define STS2_DATA_OUT_RANGE (1 << 1) 84502b5a01SGuenter Roeck #define STS2_RESTARTED_OK (1 << 1) 85502b5a01SGuenter Roeck #define STS2_ISOLATION_TEST_FAIL (1 << 3) 86502b5a01SGuenter Roeck #define STS2_HIGH_POWER_CAP (1 << 4) 87502b5a01SGuenter Roeck #define STS2_INVALID_INSTR (1 << 5) 88502b5a01SGuenter Roeck #define STS2_WILL_RESTART (1 << 6) 89502b5a01SGuenter Roeck #define STS2_PEC_ERR (1 << 7) 90502b5a01SGuenter Roeck 91502b5a01SGuenter Roeck /* Alarm register bits */ 92502b5a01SGuenter Roeck #define ALRM1_VIN_OUT_LIMIT (1 << 0) 93502b5a01SGuenter Roeck #define ALRM1_VOUT_OUT_LIMIT (1 << 1) 94502b5a01SGuenter Roeck #define ALRM1_OV_VOLT_SHUTDOWN (1 << 2) 95502b5a01SGuenter Roeck #define ALRM1_VIN_OVERCURRENT (1 << 3) 96502b5a01SGuenter Roeck #define ALRM1_TEMP_WARNING (1 << 4) 97502b5a01SGuenter Roeck #define ALRM1_TEMP_SHUTDOWN (1 << 5) 98502b5a01SGuenter Roeck #define ALRM1_PRIMARY_FAULT (1 << 6) 99502b5a01SGuenter Roeck #define ALRM1_POWER_LIMIT (1 << 7) 100502b5a01SGuenter Roeck 101502b5a01SGuenter Roeck #define ALRM2_5V_OUT_LIMIT (1 << 1) 102502b5a01SGuenter Roeck #define ALRM2_TEMP_FAULT (1 << 2) 103502b5a01SGuenter Roeck #define ALRM2_OV_LOW (1 << 3) 104502b5a01SGuenter Roeck #define ALRM2_DCDC_TEMP_HIGH (1 << 4) 105502b5a01SGuenter Roeck #define ALRM2_PRI_TEMP_HIGH (1 << 5) 106502b5a01SGuenter Roeck #define ALRM2_NO_PRIMARY (1 << 6) 107502b5a01SGuenter Roeck #define ALRM2_FAN_FAULT (1 << 7) 108502b5a01SGuenter Roeck 109502b5a01SGuenter Roeck #define FIRMWARE_REV_LEN 4 110502b5a01SGuenter Roeck #define DATA_STRING_LEN 9 111502b5a01SGuenter Roeck #define INPUT_STRING_LEN 5 /* 4 for most devices */ 112502b5a01SGuenter Roeck #define FAN_SPEED_LEN 5 113502b5a01SGuenter Roeck 114502b5a01SGuenter Roeck struct pem_data { 11582803252SAxel Lin struct i2c_client *client; 11682803252SAxel Lin const struct attribute_group *groups[4]; 117502b5a01SGuenter Roeck 118502b5a01SGuenter Roeck struct mutex update_lock; 119502b5a01SGuenter Roeck bool valid; 120502b5a01SGuenter Roeck bool fans_supported; 121502b5a01SGuenter Roeck int input_length; 122502b5a01SGuenter Roeck unsigned long last_updated; /* in jiffies */ 123502b5a01SGuenter Roeck 124502b5a01SGuenter Roeck u8 firmware_rev[FIRMWARE_REV_LEN]; 125502b5a01SGuenter Roeck u8 data_string[DATA_STRING_LEN]; 126502b5a01SGuenter Roeck u8 input_string[INPUT_STRING_LEN]; 127502b5a01SGuenter Roeck u8 fan_speed[FAN_SPEED_LEN]; 128502b5a01SGuenter Roeck }; 129502b5a01SGuenter Roeck 130502b5a01SGuenter Roeck static int pem_read_block(struct i2c_client *client, u8 command, u8 *data, 131502b5a01SGuenter Roeck int data_len) 132502b5a01SGuenter Roeck { 133502b5a01SGuenter Roeck u8 block_buffer[I2C_SMBUS_BLOCK_MAX]; 134502b5a01SGuenter Roeck int result; 135502b5a01SGuenter Roeck 136502b5a01SGuenter Roeck result = i2c_smbus_read_block_data(client, command, block_buffer); 137502b5a01SGuenter Roeck if (unlikely(result < 0)) 138502b5a01SGuenter Roeck goto abort; 139502b5a01SGuenter Roeck if (unlikely(result == 0xff || result != data_len)) { 140502b5a01SGuenter Roeck result = -EIO; 141502b5a01SGuenter Roeck goto abort; 142502b5a01SGuenter Roeck } 143502b5a01SGuenter Roeck memcpy(data, block_buffer, data_len); 144502b5a01SGuenter Roeck result = 0; 145502b5a01SGuenter Roeck abort: 146502b5a01SGuenter Roeck return result; 147502b5a01SGuenter Roeck } 148502b5a01SGuenter Roeck 149502b5a01SGuenter Roeck static struct pem_data *pem_update_device(struct device *dev) 150502b5a01SGuenter Roeck { 15182803252SAxel Lin struct pem_data *data = dev_get_drvdata(dev); 15282803252SAxel Lin struct i2c_client *client = data->client; 153502b5a01SGuenter Roeck struct pem_data *ret = data; 154502b5a01SGuenter Roeck 155502b5a01SGuenter Roeck mutex_lock(&data->update_lock); 156502b5a01SGuenter Roeck 157502b5a01SGuenter Roeck if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 158502b5a01SGuenter Roeck int result; 159502b5a01SGuenter Roeck 160502b5a01SGuenter Roeck /* Read data string */ 161502b5a01SGuenter Roeck result = pem_read_block(client, PEM_READ_DATA_STRING, 162502b5a01SGuenter Roeck data->data_string, 163502b5a01SGuenter Roeck sizeof(data->data_string)); 164502b5a01SGuenter Roeck if (unlikely(result < 0)) { 165502b5a01SGuenter Roeck ret = ERR_PTR(result); 166502b5a01SGuenter Roeck goto abort; 167502b5a01SGuenter Roeck } 168502b5a01SGuenter Roeck 169502b5a01SGuenter Roeck /* Read input string */ 170502b5a01SGuenter Roeck if (data->input_length) { 171502b5a01SGuenter Roeck result = pem_read_block(client, PEM_READ_INPUT_STRING, 172502b5a01SGuenter Roeck data->input_string, 173502b5a01SGuenter Roeck data->input_length); 174502b5a01SGuenter Roeck if (unlikely(result < 0)) { 175502b5a01SGuenter Roeck ret = ERR_PTR(result); 176502b5a01SGuenter Roeck goto abort; 177502b5a01SGuenter Roeck } 178502b5a01SGuenter Roeck } 179502b5a01SGuenter Roeck 180502b5a01SGuenter Roeck /* Read fan speeds */ 181502b5a01SGuenter Roeck if (data->fans_supported) { 182502b5a01SGuenter Roeck result = pem_read_block(client, PEM_READ_FAN_SPEED, 183502b5a01SGuenter Roeck data->fan_speed, 184502b5a01SGuenter Roeck sizeof(data->fan_speed)); 185502b5a01SGuenter Roeck if (unlikely(result < 0)) { 186502b5a01SGuenter Roeck ret = ERR_PTR(result); 187502b5a01SGuenter Roeck goto abort; 188502b5a01SGuenter Roeck } 189502b5a01SGuenter Roeck } 190502b5a01SGuenter Roeck 191502b5a01SGuenter Roeck i2c_smbus_write_byte(client, PEM_CLEAR_INFO_FLAGS); 192502b5a01SGuenter Roeck 193502b5a01SGuenter Roeck data->last_updated = jiffies; 194952a11caSPaul Fertser data->valid = true; 195502b5a01SGuenter Roeck } 196502b5a01SGuenter Roeck abort: 197502b5a01SGuenter Roeck mutex_unlock(&data->update_lock); 198502b5a01SGuenter Roeck return ret; 199502b5a01SGuenter Roeck } 200502b5a01SGuenter Roeck 201502b5a01SGuenter Roeck static long pem_get_data(u8 *data, int len, int index) 202502b5a01SGuenter Roeck { 203502b5a01SGuenter Roeck long val; 204502b5a01SGuenter Roeck 205502b5a01SGuenter Roeck switch (index) { 206502b5a01SGuenter Roeck case PEM_DATA_VOUT_LSB: 207502b5a01SGuenter Roeck val = (data[index] + (data[index+1] << 8)) * 5 / 2; 208502b5a01SGuenter Roeck break; 209502b5a01SGuenter Roeck case PEM_DATA_CURRENT: 210502b5a01SGuenter Roeck val = data[index] * 200; 211502b5a01SGuenter Roeck break; 212502b5a01SGuenter Roeck case PEM_DATA_TEMP: 213502b5a01SGuenter Roeck val = data[index] * 1000; 214502b5a01SGuenter Roeck break; 215502b5a01SGuenter Roeck case PEM_DATA_TEMP_MAX: 216502b5a01SGuenter Roeck val = 97 * 1000; /* 97 degrees C per datasheet */ 217502b5a01SGuenter Roeck break; 218502b5a01SGuenter Roeck case PEM_DATA_TEMP_CRIT: 219502b5a01SGuenter Roeck val = 107 * 1000; /* 107 degrees C per datasheet */ 220502b5a01SGuenter Roeck break; 221502b5a01SGuenter Roeck default: 222502b5a01SGuenter Roeck WARN_ON_ONCE(1); 223502b5a01SGuenter Roeck val = 0; 224502b5a01SGuenter Roeck } 225502b5a01SGuenter Roeck return val; 226502b5a01SGuenter Roeck } 227502b5a01SGuenter Roeck 228502b5a01SGuenter Roeck static long pem_get_input(u8 *data, int len, int index) 229502b5a01SGuenter Roeck { 230502b5a01SGuenter Roeck long val; 231502b5a01SGuenter Roeck 232502b5a01SGuenter Roeck switch (index) { 233502b5a01SGuenter Roeck case PEM_INPUT_VOLTAGE: 234502b5a01SGuenter Roeck if (len == INPUT_STRING_LEN) 235502b5a01SGuenter Roeck val = (data[index] + (data[index+1] << 8) - 75) * 1000; 236502b5a01SGuenter Roeck else 237502b5a01SGuenter Roeck val = (data[index] - 75) * 1000; 238502b5a01SGuenter Roeck break; 239502b5a01SGuenter Roeck case PEM_INPUT_POWER_LSB: 240502b5a01SGuenter Roeck if (len == INPUT_STRING_LEN) 241502b5a01SGuenter Roeck index++; 242502b5a01SGuenter Roeck val = (data[index] + (data[index+1] << 8)) * 1000000L; 243502b5a01SGuenter Roeck break; 244502b5a01SGuenter Roeck default: 245502b5a01SGuenter Roeck WARN_ON_ONCE(1); 246502b5a01SGuenter Roeck val = 0; 247502b5a01SGuenter Roeck } 248502b5a01SGuenter Roeck return val; 249502b5a01SGuenter Roeck } 250502b5a01SGuenter Roeck 251502b5a01SGuenter Roeck static long pem_get_fan(u8 *data, int len, int index) 252502b5a01SGuenter Roeck { 253502b5a01SGuenter Roeck long val; 254502b5a01SGuenter Roeck 255502b5a01SGuenter Roeck switch (index) { 256502b5a01SGuenter Roeck case PEM_FAN_FAN1: 257502b5a01SGuenter Roeck case PEM_FAN_FAN2: 258502b5a01SGuenter Roeck case PEM_FAN_FAN3: 259502b5a01SGuenter Roeck val = data[index] * 100; 260502b5a01SGuenter Roeck break; 261502b5a01SGuenter Roeck default: 262502b5a01SGuenter Roeck WARN_ON_ONCE(1); 263502b5a01SGuenter Roeck val = 0; 264502b5a01SGuenter Roeck } 265502b5a01SGuenter Roeck return val; 266502b5a01SGuenter Roeck } 267502b5a01SGuenter Roeck 268502b5a01SGuenter Roeck /* 269502b5a01SGuenter Roeck * Show boolean, either a fault or an alarm. 270502b5a01SGuenter Roeck * .nr points to the register, .index is the bit mask to check 271502b5a01SGuenter Roeck */ 2726ccf6a83SGuenter Roeck static ssize_t pem_bool_show(struct device *dev, struct device_attribute *da, 2736ccf6a83SGuenter Roeck char *buf) 274502b5a01SGuenter Roeck { 275502b5a01SGuenter Roeck struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(da); 276502b5a01SGuenter Roeck struct pem_data *data = pem_update_device(dev); 277502b5a01SGuenter Roeck u8 status; 278502b5a01SGuenter Roeck 279502b5a01SGuenter Roeck if (IS_ERR(data)) 280502b5a01SGuenter Roeck return PTR_ERR(data); 281502b5a01SGuenter Roeck 282502b5a01SGuenter Roeck status = data->data_string[attr->nr] & attr->index; 2831f4d4af4SGuenter Roeck return sysfs_emit(buf, "%d\n", !!status); 284502b5a01SGuenter Roeck } 285502b5a01SGuenter Roeck 2866ccf6a83SGuenter Roeck static ssize_t pem_data_show(struct device *dev, struct device_attribute *da, 287502b5a01SGuenter Roeck char *buf) 288502b5a01SGuenter Roeck { 289502b5a01SGuenter Roeck struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 290502b5a01SGuenter Roeck struct pem_data *data = pem_update_device(dev); 291502b5a01SGuenter Roeck long value; 292502b5a01SGuenter Roeck 293502b5a01SGuenter Roeck if (IS_ERR(data)) 294502b5a01SGuenter Roeck return PTR_ERR(data); 295502b5a01SGuenter Roeck 296502b5a01SGuenter Roeck value = pem_get_data(data->data_string, sizeof(data->data_string), 297502b5a01SGuenter Roeck attr->index); 298502b5a01SGuenter Roeck 2991f4d4af4SGuenter Roeck return sysfs_emit(buf, "%ld\n", value); 300502b5a01SGuenter Roeck } 301502b5a01SGuenter Roeck 3026ccf6a83SGuenter Roeck static ssize_t pem_input_show(struct device *dev, struct device_attribute *da, 303502b5a01SGuenter Roeck char *buf) 304502b5a01SGuenter Roeck { 305502b5a01SGuenter Roeck struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 306502b5a01SGuenter Roeck struct pem_data *data = pem_update_device(dev); 307502b5a01SGuenter Roeck long value; 308502b5a01SGuenter Roeck 309502b5a01SGuenter Roeck if (IS_ERR(data)) 310502b5a01SGuenter Roeck return PTR_ERR(data); 311502b5a01SGuenter Roeck 312502b5a01SGuenter Roeck value = pem_get_input(data->input_string, sizeof(data->input_string), 313502b5a01SGuenter Roeck attr->index); 314502b5a01SGuenter Roeck 3151f4d4af4SGuenter Roeck return sysfs_emit(buf, "%ld\n", value); 316502b5a01SGuenter Roeck } 317502b5a01SGuenter Roeck 3186ccf6a83SGuenter Roeck static ssize_t pem_fan_show(struct device *dev, struct device_attribute *da, 319502b5a01SGuenter Roeck char *buf) 320502b5a01SGuenter Roeck { 321502b5a01SGuenter Roeck struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 322502b5a01SGuenter Roeck struct pem_data *data = pem_update_device(dev); 323502b5a01SGuenter Roeck long value; 324502b5a01SGuenter Roeck 325502b5a01SGuenter Roeck if (IS_ERR(data)) 326502b5a01SGuenter Roeck return PTR_ERR(data); 327502b5a01SGuenter Roeck 328502b5a01SGuenter Roeck value = pem_get_fan(data->fan_speed, sizeof(data->fan_speed), 329502b5a01SGuenter Roeck attr->index); 330502b5a01SGuenter Roeck 3311f4d4af4SGuenter Roeck return sysfs_emit(buf, "%ld\n", value); 332502b5a01SGuenter Roeck } 333502b5a01SGuenter Roeck 334502b5a01SGuenter Roeck /* Voltages */ 3356ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(in1_input, pem_data, PEM_DATA_VOUT_LSB); 3366ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, pem_bool, PEM_DATA_ALARM_1, 3376ccf6a83SGuenter Roeck ALRM1_VOUT_OUT_LIMIT); 3386ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(in1_crit_alarm, pem_bool, PEM_DATA_ALARM_1, 3396ccf6a83SGuenter Roeck ALRM1_OV_VOLT_SHUTDOWN); 3406ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(in2_input, pem_input, PEM_INPUT_VOLTAGE); 3416ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, pem_bool, PEM_DATA_ALARM_1, 342502b5a01SGuenter Roeck ALRM1_VIN_OUT_LIMIT | ALRM1_PRIMARY_FAULT); 343502b5a01SGuenter Roeck 344502b5a01SGuenter Roeck /* Currents */ 3456ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(curr1_input, pem_data, PEM_DATA_CURRENT); 3466ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(curr1_alarm, pem_bool, PEM_DATA_ALARM_1, 3476ccf6a83SGuenter Roeck ALRM1_VIN_OVERCURRENT); 348502b5a01SGuenter Roeck 349502b5a01SGuenter Roeck /* Power */ 3506ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(power1_input, pem_input, PEM_INPUT_POWER_LSB); 3516ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(power1_alarm, pem_bool, PEM_DATA_ALARM_1, 3526ccf6a83SGuenter Roeck ALRM1_POWER_LIMIT); 353502b5a01SGuenter Roeck 354502b5a01SGuenter Roeck /* Fans */ 3556ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(fan1_input, pem_fan, PEM_FAN_FAN1); 3566ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(fan2_input, pem_fan, PEM_FAN_FAN2); 3576ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(fan3_input, pem_fan, PEM_FAN_FAN3); 3586ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, pem_bool, PEM_DATA_ALARM_2, 3596ccf6a83SGuenter Roeck ALRM2_FAN_FAULT); 360502b5a01SGuenter Roeck 361502b5a01SGuenter Roeck /* Temperatures */ 3626ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(temp1_input, pem_data, PEM_DATA_TEMP); 3636ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(temp1_max, pem_data, PEM_DATA_TEMP_MAX); 3646ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_RO(temp1_crit, pem_data, PEM_DATA_TEMP_CRIT); 3656ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(temp1_alarm, pem_bool, PEM_DATA_ALARM_1, 3666ccf6a83SGuenter Roeck ALRM1_TEMP_WARNING); 3676ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, pem_bool, PEM_DATA_ALARM_1, 3686ccf6a83SGuenter Roeck ALRM1_TEMP_SHUTDOWN); 3696ccf6a83SGuenter Roeck static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, pem_bool, PEM_DATA_ALARM_2, 3706ccf6a83SGuenter Roeck ALRM2_TEMP_FAULT); 371502b5a01SGuenter Roeck 372502b5a01SGuenter Roeck static struct attribute *pem_attributes[] = { 373502b5a01SGuenter Roeck &sensor_dev_attr_in1_input.dev_attr.attr, 374d668a8b0SGuenter Roeck &sensor_dev_attr_in1_alarm.dev_attr.attr, 375502b5a01SGuenter Roeck &sensor_dev_attr_in1_crit_alarm.dev_attr.attr, 376502b5a01SGuenter Roeck &sensor_dev_attr_in2_alarm.dev_attr.attr, 377502b5a01SGuenter Roeck 378502b5a01SGuenter Roeck &sensor_dev_attr_curr1_alarm.dev_attr.attr, 379502b5a01SGuenter Roeck 380502b5a01SGuenter Roeck &sensor_dev_attr_power1_alarm.dev_attr.attr, 381502b5a01SGuenter Roeck 382502b5a01SGuenter Roeck &sensor_dev_attr_fan1_alarm.dev_attr.attr, 383502b5a01SGuenter Roeck 384502b5a01SGuenter Roeck &sensor_dev_attr_temp1_input.dev_attr.attr, 385502b5a01SGuenter Roeck &sensor_dev_attr_temp1_max.dev_attr.attr, 386502b5a01SGuenter Roeck &sensor_dev_attr_temp1_crit.dev_attr.attr, 387502b5a01SGuenter Roeck &sensor_dev_attr_temp1_alarm.dev_attr.attr, 388502b5a01SGuenter Roeck &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 389502b5a01SGuenter Roeck &sensor_dev_attr_temp1_fault.dev_attr.attr, 390502b5a01SGuenter Roeck 391502b5a01SGuenter Roeck NULL, 392502b5a01SGuenter Roeck }; 393502b5a01SGuenter Roeck 394502b5a01SGuenter Roeck static const struct attribute_group pem_group = { 395502b5a01SGuenter Roeck .attrs = pem_attributes, 396502b5a01SGuenter Roeck }; 397502b5a01SGuenter Roeck 398502b5a01SGuenter Roeck static struct attribute *pem_input_attributes[] = { 399502b5a01SGuenter Roeck &sensor_dev_attr_in2_input.dev_attr.attr, 400502b5a01SGuenter Roeck &sensor_dev_attr_curr1_input.dev_attr.attr, 401502b5a01SGuenter Roeck &sensor_dev_attr_power1_input.dev_attr.attr, 402df069079SAxel Lin NULL 403502b5a01SGuenter Roeck }; 404502b5a01SGuenter Roeck 405502b5a01SGuenter Roeck static const struct attribute_group pem_input_group = { 406502b5a01SGuenter Roeck .attrs = pem_input_attributes, 407502b5a01SGuenter Roeck }; 408502b5a01SGuenter Roeck 409502b5a01SGuenter Roeck static struct attribute *pem_fan_attributes[] = { 410502b5a01SGuenter Roeck &sensor_dev_attr_fan1_input.dev_attr.attr, 411502b5a01SGuenter Roeck &sensor_dev_attr_fan2_input.dev_attr.attr, 412502b5a01SGuenter Roeck &sensor_dev_attr_fan3_input.dev_attr.attr, 413df069079SAxel Lin NULL 414502b5a01SGuenter Roeck }; 415502b5a01SGuenter Roeck 416502b5a01SGuenter Roeck static const struct attribute_group pem_fan_group = { 417502b5a01SGuenter Roeck .attrs = pem_fan_attributes, 418502b5a01SGuenter Roeck }; 419502b5a01SGuenter Roeck 42067487038SStephen Kitt static int pem_probe(struct i2c_client *client) 421502b5a01SGuenter Roeck { 422502b5a01SGuenter Roeck struct i2c_adapter *adapter = client->adapter; 42382803252SAxel Lin struct device *dev = &client->dev; 42482803252SAxel Lin struct device *hwmon_dev; 425502b5a01SGuenter Roeck struct pem_data *data; 42682803252SAxel Lin int ret, idx = 0; 427502b5a01SGuenter Roeck 428502b5a01SGuenter Roeck if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BLOCK_DATA 429502b5a01SGuenter Roeck | I2C_FUNC_SMBUS_WRITE_BYTE)) 430502b5a01SGuenter Roeck return -ENODEV; 431502b5a01SGuenter Roeck 43282803252SAxel Lin data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 433502b5a01SGuenter Roeck if (!data) 434502b5a01SGuenter Roeck return -ENOMEM; 435502b5a01SGuenter Roeck 43682803252SAxel Lin data->client = client; 437502b5a01SGuenter Roeck mutex_init(&data->update_lock); 438502b5a01SGuenter Roeck 439502b5a01SGuenter Roeck /* 440502b5a01SGuenter Roeck * We use the next two commands to determine if the device is really 441502b5a01SGuenter Roeck * there. 442502b5a01SGuenter Roeck */ 443502b5a01SGuenter Roeck ret = pem_read_block(client, PEM_READ_FIRMWARE_REV, 444502b5a01SGuenter Roeck data->firmware_rev, sizeof(data->firmware_rev)); 445502b5a01SGuenter Roeck if (ret < 0) 44607404aabSGuenter Roeck return ret; 447502b5a01SGuenter Roeck 448502b5a01SGuenter Roeck ret = i2c_smbus_write_byte(client, PEM_CLEAR_INFO_FLAGS); 449502b5a01SGuenter Roeck if (ret < 0) 45007404aabSGuenter Roeck return ret; 451502b5a01SGuenter Roeck 45282803252SAxel Lin dev_info(dev, "Firmware revision %d.%d.%d\n", 453502b5a01SGuenter Roeck data->firmware_rev[0], data->firmware_rev[1], 454502b5a01SGuenter Roeck data->firmware_rev[2]); 455502b5a01SGuenter Roeck 45682803252SAxel Lin /* sysfs hooks */ 45782803252SAxel Lin data->groups[idx++] = &pem_group; 458502b5a01SGuenter Roeck 459502b5a01SGuenter Roeck /* 460502b5a01SGuenter Roeck * Check if input readings are supported. 461502b5a01SGuenter Roeck * This is the case if we can read input data, 462502b5a01SGuenter Roeck * and if the returned data is not all zeros. 463502b5a01SGuenter Roeck * Note that input alarms are always supported. 464502b5a01SGuenter Roeck */ 465502b5a01SGuenter Roeck ret = pem_read_block(client, PEM_READ_INPUT_STRING, 466502b5a01SGuenter Roeck data->input_string, 467502b5a01SGuenter Roeck sizeof(data->input_string) - 1); 468502b5a01SGuenter Roeck if (!ret && (data->input_string[0] || data->input_string[1] || 469502b5a01SGuenter Roeck data->input_string[2])) 470502b5a01SGuenter Roeck data->input_length = sizeof(data->input_string) - 1; 471502b5a01SGuenter Roeck else if (ret < 0) { 472502b5a01SGuenter Roeck /* Input string is one byte longer for some devices */ 473502b5a01SGuenter Roeck ret = pem_read_block(client, PEM_READ_INPUT_STRING, 474502b5a01SGuenter Roeck data->input_string, 475502b5a01SGuenter Roeck sizeof(data->input_string)); 476502b5a01SGuenter Roeck if (!ret && (data->input_string[0] || data->input_string[1] || 477502b5a01SGuenter Roeck data->input_string[2] || data->input_string[3])) 478502b5a01SGuenter Roeck data->input_length = sizeof(data->input_string); 479502b5a01SGuenter Roeck } 48082803252SAxel Lin 48182803252SAxel Lin if (data->input_length) 48282803252SAxel Lin data->groups[idx++] = &pem_input_group; 483502b5a01SGuenter Roeck 484502b5a01SGuenter Roeck /* 485502b5a01SGuenter Roeck * Check if fan speed readings are supported. 486502b5a01SGuenter Roeck * This is the case if we can read fan speed data, 487502b5a01SGuenter Roeck * and if the returned data is not all zeros. 488502b5a01SGuenter Roeck * Note that the fan alarm is always supported. 489502b5a01SGuenter Roeck */ 490502b5a01SGuenter Roeck ret = pem_read_block(client, PEM_READ_FAN_SPEED, 491502b5a01SGuenter Roeck data->fan_speed, 492502b5a01SGuenter Roeck sizeof(data->fan_speed)); 493502b5a01SGuenter Roeck if (!ret && (data->fan_speed[0] || data->fan_speed[1] || 494502b5a01SGuenter Roeck data->fan_speed[2] || data->fan_speed[3])) { 495502b5a01SGuenter Roeck data->fans_supported = true; 49682803252SAxel Lin data->groups[idx++] = &pem_fan_group; 497502b5a01SGuenter Roeck } 498502b5a01SGuenter Roeck 49982803252SAxel Lin hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 50082803252SAxel Lin data, data->groups); 50182803252SAxel Lin return PTR_ERR_OR_ZERO(hwmon_dev); 502502b5a01SGuenter Roeck } 503502b5a01SGuenter Roeck 504502b5a01SGuenter Roeck static const struct i2c_device_id pem_id[] = { 505502b5a01SGuenter Roeck {"lineage_pem", 0}, 506502b5a01SGuenter Roeck {} 507502b5a01SGuenter Roeck }; 508502b5a01SGuenter Roeck MODULE_DEVICE_TABLE(i2c, pem_id); 509502b5a01SGuenter Roeck 510502b5a01SGuenter Roeck static struct i2c_driver pem_driver = { 511502b5a01SGuenter Roeck .driver = { 512502b5a01SGuenter Roeck .name = "lineage_pem", 513502b5a01SGuenter Roeck }, 514*1975d167SUwe Kleine-König .probe = pem_probe, 515502b5a01SGuenter Roeck .id_table = pem_id, 516502b5a01SGuenter Roeck }; 517502b5a01SGuenter Roeck 518f0967eeaSAxel Lin module_i2c_driver(pem_driver); 519502b5a01SGuenter Roeck 520bb9a80e5SGuenter Roeck MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); 521502b5a01SGuenter Roeck MODULE_DESCRIPTION("Lineage CPL PEM hardware monitoring driver"); 522502b5a01SGuenter Roeck MODULE_LICENSE("GPL"); 523