17cb6dcffSAndrew F. Davis /* 27cb6dcffSAndrew F. Davis * INA3221 Triple Current/Voltage Monitor 37cb6dcffSAndrew F. Davis * 47cb6dcffSAndrew F. Davis * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/ 57cb6dcffSAndrew F. Davis * Andrew F. Davis <afd@ti.com> 67cb6dcffSAndrew F. Davis * 77cb6dcffSAndrew F. Davis * This program is free software; you can redistribute it and/or modify 87cb6dcffSAndrew F. Davis * it under the terms of the GNU General Public License version 2 as 97cb6dcffSAndrew F. Davis * published by the Free Software Foundation. 107cb6dcffSAndrew F. Davis * 117cb6dcffSAndrew F. Davis * This program is distributed in the hope that it will be useful, but 127cb6dcffSAndrew F. Davis * WITHOUT ANY WARRANTY; without even the implied warranty of 137cb6dcffSAndrew F. Davis * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 147cb6dcffSAndrew F. Davis * General Public License for more details. 157cb6dcffSAndrew F. Davis */ 167cb6dcffSAndrew F. Davis 177cb6dcffSAndrew F. Davis #include <linux/hwmon.h> 187cb6dcffSAndrew F. Davis #include <linux/hwmon-sysfs.h> 197cb6dcffSAndrew F. Davis #include <linux/i2c.h> 207cb6dcffSAndrew F. Davis #include <linux/module.h> 217cb6dcffSAndrew F. Davis #include <linux/of.h> 227cb6dcffSAndrew F. Davis #include <linux/regmap.h> 237cb6dcffSAndrew F. Davis 247cb6dcffSAndrew F. Davis #define INA3221_DRIVER_NAME "ina3221" 257cb6dcffSAndrew F. Davis 267cb6dcffSAndrew F. Davis #define INA3221_CONFIG 0x00 277cb6dcffSAndrew F. Davis #define INA3221_SHUNT1 0x01 287cb6dcffSAndrew F. Davis #define INA3221_BUS1 0x02 297cb6dcffSAndrew F. Davis #define INA3221_SHUNT2 0x03 307cb6dcffSAndrew F. Davis #define INA3221_BUS2 0x04 317cb6dcffSAndrew F. Davis #define INA3221_SHUNT3 0x05 327cb6dcffSAndrew F. Davis #define INA3221_BUS3 0x06 337cb6dcffSAndrew F. Davis #define INA3221_CRIT1 0x07 347cb6dcffSAndrew F. Davis #define INA3221_WARN1 0x08 357cb6dcffSAndrew F. Davis #define INA3221_CRIT2 0x09 367cb6dcffSAndrew F. Davis #define INA3221_WARN2 0x0a 377cb6dcffSAndrew F. Davis #define INA3221_CRIT3 0x0b 387cb6dcffSAndrew F. Davis #define INA3221_WARN3 0x0c 397cb6dcffSAndrew F. Davis #define INA3221_MASK_ENABLE 0x0f 407cb6dcffSAndrew F. Davis 4159d608e1SNicolin Chen #define INA3221_CONFIG_MODE_MASK GENMASK(2, 0) 4259d608e1SNicolin Chen #define INA3221_CONFIG_MODE_POWERDOWN 0 43791ebc9dSNicolin Chen #define INA3221_CONFIG_MODE_SHUNT BIT(0) 44791ebc9dSNicolin Chen #define INA3221_CONFIG_MODE_BUS BIT(1) 45791ebc9dSNicolin Chen #define INA3221_CONFIG_MODE_CONTINUOUS BIT(2) 467cb6dcffSAndrew F. Davis 477cb6dcffSAndrew F. Davis #define INA3221_RSHUNT_DEFAULT 10000 487cb6dcffSAndrew F. Davis 497cb6dcffSAndrew F. Davis enum ina3221_fields { 507cb6dcffSAndrew F. Davis /* Configuration */ 517cb6dcffSAndrew F. Davis F_RST, 527cb6dcffSAndrew F. Davis 537cb6dcffSAndrew F. Davis /* Alert Flags */ 547cb6dcffSAndrew F. Davis F_WF3, F_WF2, F_WF1, 557cb6dcffSAndrew F. Davis F_CF3, F_CF2, F_CF1, 567cb6dcffSAndrew F. Davis 577cb6dcffSAndrew F. Davis /* sentinel */ 587cb6dcffSAndrew F. Davis F_MAX_FIELDS 597cb6dcffSAndrew F. Davis }; 607cb6dcffSAndrew F. Davis 617cb6dcffSAndrew F. Davis static const struct reg_field ina3221_reg_fields[] = { 627cb6dcffSAndrew F. Davis [F_RST] = REG_FIELD(INA3221_CONFIG, 15, 15), 637cb6dcffSAndrew F. Davis 647cb6dcffSAndrew F. Davis [F_WF3] = REG_FIELD(INA3221_MASK_ENABLE, 3, 3), 657cb6dcffSAndrew F. Davis [F_WF2] = REG_FIELD(INA3221_MASK_ENABLE, 4, 4), 667cb6dcffSAndrew F. Davis [F_WF1] = REG_FIELD(INA3221_MASK_ENABLE, 5, 5), 677cb6dcffSAndrew F. Davis [F_CF3] = REG_FIELD(INA3221_MASK_ENABLE, 7, 7), 687cb6dcffSAndrew F. Davis [F_CF2] = REG_FIELD(INA3221_MASK_ENABLE, 8, 8), 697cb6dcffSAndrew F. Davis [F_CF1] = REG_FIELD(INA3221_MASK_ENABLE, 9, 9), 707cb6dcffSAndrew F. Davis }; 717cb6dcffSAndrew F. Davis 727cb6dcffSAndrew F. Davis enum ina3221_channels { 737cb6dcffSAndrew F. Davis INA3221_CHANNEL1, 747cb6dcffSAndrew F. Davis INA3221_CHANNEL2, 757cb6dcffSAndrew F. Davis INA3221_CHANNEL3, 767cb6dcffSAndrew F. Davis INA3221_NUM_CHANNELS 777cb6dcffSAndrew F. Davis }; 787cb6dcffSAndrew F. Davis 797cb6dcffSAndrew F. Davis static const unsigned int register_channel[] = { 807cb6dcffSAndrew F. Davis [INA3221_SHUNT1] = INA3221_CHANNEL1, 817cb6dcffSAndrew F. Davis [INA3221_SHUNT2] = INA3221_CHANNEL2, 827cb6dcffSAndrew F. Davis [INA3221_SHUNT3] = INA3221_CHANNEL3, 837cb6dcffSAndrew F. Davis [INA3221_CRIT1] = INA3221_CHANNEL1, 847cb6dcffSAndrew F. Davis [INA3221_CRIT2] = INA3221_CHANNEL2, 857cb6dcffSAndrew F. Davis [INA3221_CRIT3] = INA3221_CHANNEL3, 867cb6dcffSAndrew F. Davis [INA3221_WARN1] = INA3221_CHANNEL1, 877cb6dcffSAndrew F. Davis [INA3221_WARN2] = INA3221_CHANNEL2, 887cb6dcffSAndrew F. Davis [INA3221_WARN3] = INA3221_CHANNEL3, 897cb6dcffSAndrew F. Davis }; 907cb6dcffSAndrew F. Davis 917cb6dcffSAndrew F. Davis /** 927cb6dcffSAndrew F. Davis * struct ina3221_data - device specific information 937cb6dcffSAndrew F. Davis * @regmap: Register map of the device 947cb6dcffSAndrew F. Davis * @fields: Register fields of the device 957cb6dcffSAndrew F. Davis * @shunt_resistors: Array of resistor values per channel 9659d608e1SNicolin Chen * @reg_config: Register value of INA3221_CONFIG 977cb6dcffSAndrew F. Davis */ 987cb6dcffSAndrew F. Davis struct ina3221_data { 997cb6dcffSAndrew F. Davis struct regmap *regmap; 1007cb6dcffSAndrew F. Davis struct regmap_field *fields[F_MAX_FIELDS]; 1019ad0df1aSGuenter Roeck int shunt_resistors[INA3221_NUM_CHANNELS]; 10259d608e1SNicolin Chen u32 reg_config; 1037cb6dcffSAndrew F. Davis }; 1047cb6dcffSAndrew F. Davis 1057cb6dcffSAndrew F. Davis static int ina3221_read_value(struct ina3221_data *ina, unsigned int reg, 1067cb6dcffSAndrew F. Davis int *val) 1077cb6dcffSAndrew F. Davis { 1087cb6dcffSAndrew F. Davis unsigned int regval; 1097cb6dcffSAndrew F. Davis int ret; 1107cb6dcffSAndrew F. Davis 1117cb6dcffSAndrew F. Davis ret = regmap_read(ina->regmap, reg, ®val); 1127cb6dcffSAndrew F. Davis if (ret) 1137cb6dcffSAndrew F. Davis return ret; 1147cb6dcffSAndrew F. Davis 1157cb6dcffSAndrew F. Davis *val = sign_extend32(regval >> 3, 12); 1167cb6dcffSAndrew F. Davis 1177cb6dcffSAndrew F. Davis return 0; 1187cb6dcffSAndrew F. Davis } 1197cb6dcffSAndrew F. Davis 1207cb6dcffSAndrew F. Davis static ssize_t ina3221_show_bus_voltage(struct device *dev, 1217cb6dcffSAndrew F. Davis struct device_attribute *attr, 1227cb6dcffSAndrew F. Davis char *buf) 1237cb6dcffSAndrew F. Davis { 1247cb6dcffSAndrew F. Davis struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr); 1257cb6dcffSAndrew F. Davis struct ina3221_data *ina = dev_get_drvdata(dev); 1267cb6dcffSAndrew F. Davis unsigned int reg = sd_attr->index; 1277cb6dcffSAndrew F. Davis int val, voltage_mv, ret; 1287cb6dcffSAndrew F. Davis 1297cb6dcffSAndrew F. Davis ret = ina3221_read_value(ina, reg, &val); 1307cb6dcffSAndrew F. Davis if (ret) 1317cb6dcffSAndrew F. Davis return ret; 1327cb6dcffSAndrew F. Davis 1337cb6dcffSAndrew F. Davis voltage_mv = val * 8; 1347cb6dcffSAndrew F. Davis 1357cb6dcffSAndrew F. Davis return snprintf(buf, PAGE_SIZE, "%d\n", voltage_mv); 1367cb6dcffSAndrew F. Davis } 1377cb6dcffSAndrew F. Davis 1387cb6dcffSAndrew F. Davis static ssize_t ina3221_show_shunt_voltage(struct device *dev, 1397cb6dcffSAndrew F. Davis struct device_attribute *attr, 1407cb6dcffSAndrew F. Davis char *buf) 1417cb6dcffSAndrew F. Davis { 1427cb6dcffSAndrew F. Davis struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr); 1437cb6dcffSAndrew F. Davis struct ina3221_data *ina = dev_get_drvdata(dev); 1447cb6dcffSAndrew F. Davis unsigned int reg = sd_attr->index; 1457cb6dcffSAndrew F. Davis int val, voltage_uv, ret; 1467cb6dcffSAndrew F. Davis 1477cb6dcffSAndrew F. Davis ret = ina3221_read_value(ina, reg, &val); 1487cb6dcffSAndrew F. Davis if (ret) 1497cb6dcffSAndrew F. Davis return ret; 1507cb6dcffSAndrew F. Davis voltage_uv = val * 40; 1517cb6dcffSAndrew F. Davis 1527cb6dcffSAndrew F. Davis return snprintf(buf, PAGE_SIZE, "%d\n", voltage_uv); 1537cb6dcffSAndrew F. Davis } 1547cb6dcffSAndrew F. Davis 1557cb6dcffSAndrew F. Davis static ssize_t ina3221_show_current(struct device *dev, 1567cb6dcffSAndrew F. Davis struct device_attribute *attr, char *buf) 1577cb6dcffSAndrew F. Davis { 1587cb6dcffSAndrew F. Davis struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr); 1597cb6dcffSAndrew F. Davis struct ina3221_data *ina = dev_get_drvdata(dev); 1607cb6dcffSAndrew F. Davis unsigned int reg = sd_attr->index; 1617cb6dcffSAndrew F. Davis unsigned int channel = register_channel[reg]; 1629ad0df1aSGuenter Roeck int resistance_uo = ina->shunt_resistors[channel]; 1637cb6dcffSAndrew F. Davis int val, current_ma, voltage_nv, ret; 1647cb6dcffSAndrew F. Davis 1657cb6dcffSAndrew F. Davis ret = ina3221_read_value(ina, reg, &val); 1667cb6dcffSAndrew F. Davis if (ret) 1677cb6dcffSAndrew F. Davis return ret; 1687cb6dcffSAndrew F. Davis voltage_nv = val * 40000; 1697cb6dcffSAndrew F. Davis 1707cb6dcffSAndrew F. Davis current_ma = DIV_ROUND_CLOSEST(voltage_nv, resistance_uo); 1717cb6dcffSAndrew F. Davis 1727cb6dcffSAndrew F. Davis return snprintf(buf, PAGE_SIZE, "%d\n", current_ma); 1737cb6dcffSAndrew F. Davis } 1747cb6dcffSAndrew F. Davis 1757cb6dcffSAndrew F. Davis static ssize_t ina3221_set_current(struct device *dev, 1767cb6dcffSAndrew F. Davis struct device_attribute *attr, 1777cb6dcffSAndrew F. Davis const char *buf, size_t count) 1787cb6dcffSAndrew F. Davis { 1797cb6dcffSAndrew F. Davis struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr); 1807cb6dcffSAndrew F. Davis struct ina3221_data *ina = dev_get_drvdata(dev); 1817cb6dcffSAndrew F. Davis unsigned int reg = sd_attr->index; 1827cb6dcffSAndrew F. Davis unsigned int channel = register_channel[reg]; 1839ad0df1aSGuenter Roeck int resistance_uo = ina->shunt_resistors[channel]; 1847cb6dcffSAndrew F. Davis int val, current_ma, voltage_uv, ret; 1857cb6dcffSAndrew F. Davis 1867cb6dcffSAndrew F. Davis ret = kstrtoint(buf, 0, ¤t_ma); 1877cb6dcffSAndrew F. Davis if (ret) 1887cb6dcffSAndrew F. Davis return ret; 1897cb6dcffSAndrew F. Davis 1907cb6dcffSAndrew F. Davis /* clamp current */ 1917cb6dcffSAndrew F. Davis current_ma = clamp_val(current_ma, 1927cb6dcffSAndrew F. Davis INT_MIN / resistance_uo, 1937cb6dcffSAndrew F. Davis INT_MAX / resistance_uo); 1947cb6dcffSAndrew F. Davis 1957cb6dcffSAndrew F. Davis voltage_uv = DIV_ROUND_CLOSEST(current_ma * resistance_uo, 1000); 1967cb6dcffSAndrew F. Davis 1977cb6dcffSAndrew F. Davis /* clamp voltage */ 1987cb6dcffSAndrew F. Davis voltage_uv = clamp_val(voltage_uv, -163800, 163800); 1997cb6dcffSAndrew F. Davis 2007cb6dcffSAndrew F. Davis /* 1 / 40uV(scale) << 3(register shift) = 5 */ 2017cb6dcffSAndrew F. Davis val = DIV_ROUND_CLOSEST(voltage_uv, 5) & 0xfff8; 2027cb6dcffSAndrew F. Davis 2037cb6dcffSAndrew F. Davis ret = regmap_write(ina->regmap, reg, val); 2047cb6dcffSAndrew F. Davis if (ret) 2057cb6dcffSAndrew F. Davis return ret; 2067cb6dcffSAndrew F. Davis 2077cb6dcffSAndrew F. Davis return count; 2087cb6dcffSAndrew F. Davis } 2097cb6dcffSAndrew F. Davis 2107cb6dcffSAndrew F. Davis static ssize_t ina3221_show_shunt(struct device *dev, 2117cb6dcffSAndrew F. Davis struct device_attribute *attr, char *buf) 2127cb6dcffSAndrew F. Davis { 2137cb6dcffSAndrew F. Davis struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr); 2147cb6dcffSAndrew F. Davis struct ina3221_data *ina = dev_get_drvdata(dev); 2157cb6dcffSAndrew F. Davis unsigned int channel = sd_attr->index; 2167cb6dcffSAndrew F. Davis unsigned int resistance_uo; 2177cb6dcffSAndrew F. Davis 2187cb6dcffSAndrew F. Davis resistance_uo = ina->shunt_resistors[channel]; 2197cb6dcffSAndrew F. Davis 2207cb6dcffSAndrew F. Davis return snprintf(buf, PAGE_SIZE, "%d\n", resistance_uo); 2217cb6dcffSAndrew F. Davis } 2227cb6dcffSAndrew F. Davis 2237cb6dcffSAndrew F. Davis static ssize_t ina3221_set_shunt(struct device *dev, 2247cb6dcffSAndrew F. Davis struct device_attribute *attr, 2257cb6dcffSAndrew F. Davis const char *buf, size_t count) 2267cb6dcffSAndrew F. Davis { 2277cb6dcffSAndrew F. Davis struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr); 2287cb6dcffSAndrew F. Davis struct ina3221_data *ina = dev_get_drvdata(dev); 2297cb6dcffSAndrew F. Davis unsigned int channel = sd_attr->index; 2309ad0df1aSGuenter Roeck int val; 2317cb6dcffSAndrew F. Davis int ret; 2327cb6dcffSAndrew F. Davis 2339ad0df1aSGuenter Roeck ret = kstrtoint(buf, 0, &val); 2347cb6dcffSAndrew F. Davis if (ret) 2357cb6dcffSAndrew F. Davis return ret; 2367cb6dcffSAndrew F. Davis 2379ad0df1aSGuenter Roeck val = clamp_val(val, 1, INT_MAX); 2387cb6dcffSAndrew F. Davis 2397cb6dcffSAndrew F. Davis ina->shunt_resistors[channel] = val; 2407cb6dcffSAndrew F. Davis 2417cb6dcffSAndrew F. Davis return count; 2427cb6dcffSAndrew F. Davis } 2437cb6dcffSAndrew F. Davis 2447cb6dcffSAndrew F. Davis static ssize_t ina3221_show_alert(struct device *dev, 2457cb6dcffSAndrew F. Davis struct device_attribute *attr, char *buf) 2467cb6dcffSAndrew F. Davis { 2477cb6dcffSAndrew F. Davis struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr); 2487cb6dcffSAndrew F. Davis struct ina3221_data *ina = dev_get_drvdata(dev); 2497cb6dcffSAndrew F. Davis unsigned int field = sd_attr->index; 2507cb6dcffSAndrew F. Davis unsigned int regval; 2517cb6dcffSAndrew F. Davis int ret; 2527cb6dcffSAndrew F. Davis 2537cb6dcffSAndrew F. Davis ret = regmap_field_read(ina->fields[field], ®val); 2547cb6dcffSAndrew F. Davis if (ret) 2557cb6dcffSAndrew F. Davis return ret; 2567cb6dcffSAndrew F. Davis 2577cb6dcffSAndrew F. Davis return snprintf(buf, PAGE_SIZE, "%d\n", regval); 2587cb6dcffSAndrew F. Davis } 2597cb6dcffSAndrew F. Davis 2607cb6dcffSAndrew F. Davis /* bus voltage */ 2617cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, 2627cb6dcffSAndrew F. Davis ina3221_show_bus_voltage, NULL, INA3221_BUS1); 2637cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, 2647cb6dcffSAndrew F. Davis ina3221_show_bus_voltage, NULL, INA3221_BUS2); 2657cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, 2667cb6dcffSAndrew F. Davis ina3221_show_bus_voltage, NULL, INA3221_BUS3); 2677cb6dcffSAndrew F. Davis 2687cb6dcffSAndrew F. Davis /* calculated current */ 2697cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, 2707cb6dcffSAndrew F. Davis ina3221_show_current, NULL, INA3221_SHUNT1); 2717cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr2_input, S_IRUGO, 2727cb6dcffSAndrew F. Davis ina3221_show_current, NULL, INA3221_SHUNT2); 2737cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr3_input, S_IRUGO, 2747cb6dcffSAndrew F. Davis ina3221_show_current, NULL, INA3221_SHUNT3); 2757cb6dcffSAndrew F. Davis 2767cb6dcffSAndrew F. Davis /* shunt resistance */ 2777cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(shunt1_resistor, S_IRUGO | S_IWUSR, 2787cb6dcffSAndrew F. Davis ina3221_show_shunt, ina3221_set_shunt, INA3221_CHANNEL1); 2797cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(shunt2_resistor, S_IRUGO | S_IWUSR, 2807cb6dcffSAndrew F. Davis ina3221_show_shunt, ina3221_set_shunt, INA3221_CHANNEL2); 2817cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(shunt3_resistor, S_IRUGO | S_IWUSR, 2827cb6dcffSAndrew F. Davis ina3221_show_shunt, ina3221_set_shunt, INA3221_CHANNEL3); 2837cb6dcffSAndrew F. Davis 2847cb6dcffSAndrew F. Davis /* critical current */ 2857cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr1_crit, S_IRUGO | S_IWUSR, 2867cb6dcffSAndrew F. Davis ina3221_show_current, ina3221_set_current, INA3221_CRIT1); 2877cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr2_crit, S_IRUGO | S_IWUSR, 2887cb6dcffSAndrew F. Davis ina3221_show_current, ina3221_set_current, INA3221_CRIT2); 2897cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr3_crit, S_IRUGO | S_IWUSR, 2907cb6dcffSAndrew F. Davis ina3221_show_current, ina3221_set_current, INA3221_CRIT3); 2917cb6dcffSAndrew F. Davis 2927cb6dcffSAndrew F. Davis /* critical current alert */ 2937cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr1_crit_alarm, S_IRUGO, 2947cb6dcffSAndrew F. Davis ina3221_show_alert, NULL, F_CF1); 2957cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr2_crit_alarm, S_IRUGO, 2967cb6dcffSAndrew F. Davis ina3221_show_alert, NULL, F_CF2); 2977cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr3_crit_alarm, S_IRUGO, 2987cb6dcffSAndrew F. Davis ina3221_show_alert, NULL, F_CF3); 2997cb6dcffSAndrew F. Davis 3007cb6dcffSAndrew F. Davis /* warning current */ 3017cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr1_max, S_IRUGO | S_IWUSR, 3027cb6dcffSAndrew F. Davis ina3221_show_current, ina3221_set_current, INA3221_WARN1); 3037cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr2_max, S_IRUGO | S_IWUSR, 3047cb6dcffSAndrew F. Davis ina3221_show_current, ina3221_set_current, INA3221_WARN2); 3057cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr3_max, S_IRUGO | S_IWUSR, 3067cb6dcffSAndrew F. Davis ina3221_show_current, ina3221_set_current, INA3221_WARN3); 3077cb6dcffSAndrew F. Davis 3087cb6dcffSAndrew F. Davis /* warning current alert */ 3097cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr1_max_alarm, S_IRUGO, 3107cb6dcffSAndrew F. Davis ina3221_show_alert, NULL, F_WF1); 3117cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr2_max_alarm, S_IRUGO, 3127cb6dcffSAndrew F. Davis ina3221_show_alert, NULL, F_WF2); 3137cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(curr3_max_alarm, S_IRUGO, 3147cb6dcffSAndrew F. Davis ina3221_show_alert, NULL, F_WF3); 3157cb6dcffSAndrew F. Davis 3167cb6dcffSAndrew F. Davis /* shunt voltage */ 3177cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, 3187cb6dcffSAndrew F. Davis ina3221_show_shunt_voltage, NULL, INA3221_SHUNT1); 3197cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, 3207cb6dcffSAndrew F. Davis ina3221_show_shunt_voltage, NULL, INA3221_SHUNT2); 3217cb6dcffSAndrew F. Davis static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, 3227cb6dcffSAndrew F. Davis ina3221_show_shunt_voltage, NULL, INA3221_SHUNT3); 3237cb6dcffSAndrew F. Davis 3247cb6dcffSAndrew F. Davis static struct attribute *ina3221_attrs[] = { 3257cb6dcffSAndrew F. Davis /* channel 1 */ 3267cb6dcffSAndrew F. Davis &sensor_dev_attr_in1_input.dev_attr.attr, 3277cb6dcffSAndrew F. Davis &sensor_dev_attr_curr1_input.dev_attr.attr, 3287cb6dcffSAndrew F. Davis &sensor_dev_attr_shunt1_resistor.dev_attr.attr, 3297cb6dcffSAndrew F. Davis &sensor_dev_attr_curr1_crit.dev_attr.attr, 3307cb6dcffSAndrew F. Davis &sensor_dev_attr_curr1_crit_alarm.dev_attr.attr, 3317cb6dcffSAndrew F. Davis &sensor_dev_attr_curr1_max.dev_attr.attr, 3327cb6dcffSAndrew F. Davis &sensor_dev_attr_curr1_max_alarm.dev_attr.attr, 3337cb6dcffSAndrew F. Davis &sensor_dev_attr_in4_input.dev_attr.attr, 3347cb6dcffSAndrew F. Davis 3357cb6dcffSAndrew F. Davis /* channel 2 */ 3367cb6dcffSAndrew F. Davis &sensor_dev_attr_in2_input.dev_attr.attr, 3377cb6dcffSAndrew F. Davis &sensor_dev_attr_curr2_input.dev_attr.attr, 3387cb6dcffSAndrew F. Davis &sensor_dev_attr_shunt2_resistor.dev_attr.attr, 3397cb6dcffSAndrew F. Davis &sensor_dev_attr_curr2_crit.dev_attr.attr, 3407cb6dcffSAndrew F. Davis &sensor_dev_attr_curr2_crit_alarm.dev_attr.attr, 3417cb6dcffSAndrew F. Davis &sensor_dev_attr_curr2_max.dev_attr.attr, 3427cb6dcffSAndrew F. Davis &sensor_dev_attr_curr2_max_alarm.dev_attr.attr, 3437cb6dcffSAndrew F. Davis &sensor_dev_attr_in5_input.dev_attr.attr, 3447cb6dcffSAndrew F. Davis 3457cb6dcffSAndrew F. Davis /* channel 3 */ 3467cb6dcffSAndrew F. Davis &sensor_dev_attr_in3_input.dev_attr.attr, 3477cb6dcffSAndrew F. Davis &sensor_dev_attr_curr3_input.dev_attr.attr, 3487cb6dcffSAndrew F. Davis &sensor_dev_attr_shunt3_resistor.dev_attr.attr, 3497cb6dcffSAndrew F. Davis &sensor_dev_attr_curr3_crit.dev_attr.attr, 3507cb6dcffSAndrew F. Davis &sensor_dev_attr_curr3_crit_alarm.dev_attr.attr, 3517cb6dcffSAndrew F. Davis &sensor_dev_attr_curr3_max.dev_attr.attr, 3527cb6dcffSAndrew F. Davis &sensor_dev_attr_curr3_max_alarm.dev_attr.attr, 3537cb6dcffSAndrew F. Davis &sensor_dev_attr_in6_input.dev_attr.attr, 3547cb6dcffSAndrew F. Davis 3557cb6dcffSAndrew F. Davis NULL, 3567cb6dcffSAndrew F. Davis }; 3577cb6dcffSAndrew F. Davis ATTRIBUTE_GROUPS(ina3221); 3587cb6dcffSAndrew F. Davis 3597cb6dcffSAndrew F. Davis static const struct regmap_range ina3221_yes_ranges[] = { 360c20217b3SNicolin Chen regmap_reg_range(INA3221_CONFIG, INA3221_BUS3), 3617cb6dcffSAndrew F. Davis regmap_reg_range(INA3221_MASK_ENABLE, INA3221_MASK_ENABLE), 3627cb6dcffSAndrew F. Davis }; 3637cb6dcffSAndrew F. Davis 3647cb6dcffSAndrew F. Davis static const struct regmap_access_table ina3221_volatile_table = { 3657cb6dcffSAndrew F. Davis .yes_ranges = ina3221_yes_ranges, 3667cb6dcffSAndrew F. Davis .n_yes_ranges = ARRAY_SIZE(ina3221_yes_ranges), 3677cb6dcffSAndrew F. Davis }; 3687cb6dcffSAndrew F. Davis 3697cb6dcffSAndrew F. Davis static const struct regmap_config ina3221_regmap_config = { 3707cb6dcffSAndrew F. Davis .reg_bits = 8, 3717cb6dcffSAndrew F. Davis .val_bits = 16, 3727cb6dcffSAndrew F. Davis 3737cb6dcffSAndrew F. Davis .cache_type = REGCACHE_RBTREE, 3747cb6dcffSAndrew F. Davis .volatile_table = &ina3221_volatile_table, 3757cb6dcffSAndrew F. Davis }; 3767cb6dcffSAndrew F. Davis 3777cb6dcffSAndrew F. Davis static int ina3221_probe(struct i2c_client *client, 3787cb6dcffSAndrew F. Davis const struct i2c_device_id *id) 3797cb6dcffSAndrew F. Davis { 3807cb6dcffSAndrew F. Davis struct device *dev = &client->dev; 3817cb6dcffSAndrew F. Davis struct ina3221_data *ina; 3827cb6dcffSAndrew F. Davis struct device *hwmon_dev; 3837cb6dcffSAndrew F. Davis int i, ret; 3847cb6dcffSAndrew F. Davis 3857cb6dcffSAndrew F. Davis ina = devm_kzalloc(dev, sizeof(*ina), GFP_KERNEL); 3867cb6dcffSAndrew F. Davis if (!ina) 3877cb6dcffSAndrew F. Davis return -ENOMEM; 3887cb6dcffSAndrew F. Davis 3897cb6dcffSAndrew F. Davis ina->regmap = devm_regmap_init_i2c(client, &ina3221_regmap_config); 3907cb6dcffSAndrew F. Davis if (IS_ERR(ina->regmap)) { 3917cb6dcffSAndrew F. Davis dev_err(dev, "Unable to allocate register map\n"); 3927cb6dcffSAndrew F. Davis return PTR_ERR(ina->regmap); 3937cb6dcffSAndrew F. Davis } 3947cb6dcffSAndrew F. Davis 3957cb6dcffSAndrew F. Davis for (i = 0; i < F_MAX_FIELDS; i++) { 3967cb6dcffSAndrew F. Davis ina->fields[i] = devm_regmap_field_alloc(dev, 3977cb6dcffSAndrew F. Davis ina->regmap, 3987cb6dcffSAndrew F. Davis ina3221_reg_fields[i]); 3997cb6dcffSAndrew F. Davis if (IS_ERR(ina->fields[i])) { 4007cb6dcffSAndrew F. Davis dev_err(dev, "Unable to allocate regmap fields\n"); 4017cb6dcffSAndrew F. Davis return PTR_ERR(ina->fields[i]); 4027cb6dcffSAndrew F. Davis } 4037cb6dcffSAndrew F. Davis } 4047cb6dcffSAndrew F. Davis 4057cb6dcffSAndrew F. Davis for (i = 0; i < INA3221_NUM_CHANNELS; i++) 4067cb6dcffSAndrew F. Davis ina->shunt_resistors[i] = INA3221_RSHUNT_DEFAULT; 4077cb6dcffSAndrew F. Davis 4087cb6dcffSAndrew F. Davis ret = regmap_field_write(ina->fields[F_RST], true); 4097cb6dcffSAndrew F. Davis if (ret) { 4107cb6dcffSAndrew F. Davis dev_err(dev, "Unable to reset device\n"); 4117cb6dcffSAndrew F. Davis return ret; 4127cb6dcffSAndrew F. Davis } 4137cb6dcffSAndrew F. Davis 41459d608e1SNicolin Chen dev_set_drvdata(dev, ina); 41559d608e1SNicolin Chen 4167cb6dcffSAndrew F. Davis hwmon_dev = devm_hwmon_device_register_with_groups(dev, 4177cb6dcffSAndrew F. Davis client->name, 4187cb6dcffSAndrew F. Davis ina, ina3221_groups); 4197cb6dcffSAndrew F. Davis if (IS_ERR(hwmon_dev)) { 4207cb6dcffSAndrew F. Davis dev_err(dev, "Unable to register hwmon device\n"); 4217cb6dcffSAndrew F. Davis return PTR_ERR(hwmon_dev); 4227cb6dcffSAndrew F. Davis } 4237cb6dcffSAndrew F. Davis 4247cb6dcffSAndrew F. Davis return 0; 4257cb6dcffSAndrew F. Davis } 4267cb6dcffSAndrew F. Davis 42759d608e1SNicolin Chen #ifdef CONFIG_PM 42859d608e1SNicolin Chen static int ina3221_suspend(struct device *dev) 42959d608e1SNicolin Chen { 43059d608e1SNicolin Chen struct ina3221_data *ina = dev_get_drvdata(dev); 43159d608e1SNicolin Chen int ret; 43259d608e1SNicolin Chen 43359d608e1SNicolin Chen /* Save config register value and enable cache-only */ 43459d608e1SNicolin Chen ret = regmap_read(ina->regmap, INA3221_CONFIG, &ina->reg_config); 43559d608e1SNicolin Chen if (ret) 43659d608e1SNicolin Chen return ret; 43759d608e1SNicolin Chen 43859d608e1SNicolin Chen /* Set to power-down mode for power saving */ 43959d608e1SNicolin Chen ret = regmap_update_bits(ina->regmap, INA3221_CONFIG, 44059d608e1SNicolin Chen INA3221_CONFIG_MODE_MASK, 44159d608e1SNicolin Chen INA3221_CONFIG_MODE_POWERDOWN); 44259d608e1SNicolin Chen if (ret) 44359d608e1SNicolin Chen return ret; 44459d608e1SNicolin Chen 44559d608e1SNicolin Chen regcache_cache_only(ina->regmap, true); 44659d608e1SNicolin Chen regcache_mark_dirty(ina->regmap); 44759d608e1SNicolin Chen 44859d608e1SNicolin Chen return 0; 44959d608e1SNicolin Chen } 45059d608e1SNicolin Chen 45159d608e1SNicolin Chen static int ina3221_resume(struct device *dev) 45259d608e1SNicolin Chen { 45359d608e1SNicolin Chen struct ina3221_data *ina = dev_get_drvdata(dev); 45459d608e1SNicolin Chen int ret; 45559d608e1SNicolin Chen 45659d608e1SNicolin Chen regcache_cache_only(ina->regmap, false); 45759d608e1SNicolin Chen 45859d608e1SNicolin Chen /* Software reset the chip */ 45959d608e1SNicolin Chen ret = regmap_field_write(ina->fields[F_RST], true); 46059d608e1SNicolin Chen if (ret) { 46159d608e1SNicolin Chen dev_err(dev, "Unable to reset device\n"); 46259d608e1SNicolin Chen return ret; 46359d608e1SNicolin Chen } 46459d608e1SNicolin Chen 46559d608e1SNicolin Chen /* Restore cached register values to hardware */ 46659d608e1SNicolin Chen ret = regcache_sync(ina->regmap); 46759d608e1SNicolin Chen if (ret) 46859d608e1SNicolin Chen return ret; 46959d608e1SNicolin Chen 47059d608e1SNicolin Chen /* Restore config register value to hardware */ 47159d608e1SNicolin Chen ret = regmap_write(ina->regmap, INA3221_CONFIG, ina->reg_config); 47259d608e1SNicolin Chen if (ret) 47359d608e1SNicolin Chen return ret; 47459d608e1SNicolin Chen 47559d608e1SNicolin Chen return 0; 47659d608e1SNicolin Chen } 47759d608e1SNicolin Chen #endif 47859d608e1SNicolin Chen 47959d608e1SNicolin Chen static const struct dev_pm_ops ina3221_pm = { 48059d608e1SNicolin Chen SET_SYSTEM_SLEEP_PM_OPS(ina3221_suspend, ina3221_resume) 48159d608e1SNicolin Chen }; 48259d608e1SNicolin Chen 4837cb6dcffSAndrew F. Davis static const struct of_device_id ina3221_of_match_table[] = { 4847cb6dcffSAndrew F. Davis { .compatible = "ti,ina3221", }, 4857cb6dcffSAndrew F. Davis { /* sentinel */ } 4867cb6dcffSAndrew F. Davis }; 4877cb6dcffSAndrew F. Davis MODULE_DEVICE_TABLE(of, ina3221_of_match_table); 4887cb6dcffSAndrew F. Davis 4897cb6dcffSAndrew F. Davis static const struct i2c_device_id ina3221_ids[] = { 4907cb6dcffSAndrew F. Davis { "ina3221", 0 }, 4917cb6dcffSAndrew F. Davis { /* sentinel */ } 4927cb6dcffSAndrew F. Davis }; 4937cb6dcffSAndrew F. Davis MODULE_DEVICE_TABLE(i2c, ina3221_ids); 4947cb6dcffSAndrew F. Davis 4957cb6dcffSAndrew F. Davis static struct i2c_driver ina3221_i2c_driver = { 4967cb6dcffSAndrew F. Davis .probe = ina3221_probe, 4977cb6dcffSAndrew F. Davis .driver = { 4987cb6dcffSAndrew F. Davis .name = INA3221_DRIVER_NAME, 4997cb6dcffSAndrew F. Davis .of_match_table = ina3221_of_match_table, 50059d608e1SNicolin Chen .pm = &ina3221_pm, 5017cb6dcffSAndrew F. Davis }, 5027cb6dcffSAndrew F. Davis .id_table = ina3221_ids, 5037cb6dcffSAndrew F. Davis }; 5047cb6dcffSAndrew F. Davis module_i2c_driver(ina3221_i2c_driver); 5057cb6dcffSAndrew F. Davis 5067cb6dcffSAndrew F. Davis MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); 5077cb6dcffSAndrew F. Davis MODULE_DESCRIPTION("Texas Instruments INA3221 HWMon Driver"); 5087cb6dcffSAndrew F. Davis MODULE_LICENSE("GPL v2"); 509