// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Lineage Compact Power Line series of power entry modules. * * Copyright (C) 2010, 2011 Ericsson AB. * * Documentation: * http://www.lineagepower.com/oem/pdf/CPLI2C.pdf */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/jiffies.h> /* * This driver supports various Lineage Compact Power Line DC/DC and AC/DC * converters such as CP1800, CP2000AC, CP2000DC, CP2100DC, and others. * * The devices are nominally PMBus compliant. However, most standard PMBus * commands are not supported. Specifically, all hardware monitoring and * status reporting commands are non-standard. For this reason, a standard * PMBus driver can not be used. * * All Lineage CPL devices have a built-in I2C bus master selector (PCA9541). * To ensure device access, this driver should only be used as client driver * to the pca9541 I2C master selector driver. */ /* Command codes */ #define PEM_OPERATION … #define PEM_CLEAR_INFO_FLAGS … #define PEM_VOUT_COMMAND … #define PEM_VOUT_OV_FAULT_LIMIT … #define PEM_READ_DATA_STRING … #define PEM_READ_INPUT_STRING … #define PEM_READ_FIRMWARE_REV … #define PEM_READ_RUN_TIMER … #define PEM_FAN_HI_SPEED … #define PEM_FAN_NORMAL_SPEED … #define PEM_READ_FAN_SPEED … /* offsets in data string */ #define PEM_DATA_STATUS_2 … #define PEM_DATA_STATUS_1 … #define PEM_DATA_ALARM_2 … #define PEM_DATA_ALARM_1 … #define PEM_DATA_VOUT_LSB … #define PEM_DATA_VOUT_MSB … #define PEM_DATA_CURRENT … #define PEM_DATA_TEMP … /* Virtual entries, to report constants */ #define PEM_DATA_TEMP_MAX … #define PEM_DATA_TEMP_CRIT … /* offsets in input string */ #define PEM_INPUT_VOLTAGE … #define PEM_INPUT_POWER_LSB … #define PEM_INPUT_POWER_MSB … /* offsets in fan data */ #define PEM_FAN_ADJUSTMENT … #define PEM_FAN_FAN1 … #define PEM_FAN_FAN2 … #define PEM_FAN_FAN3 … /* Status register bits */ #define STS1_OUTPUT_ON … #define STS1_LEDS_FLASHING … #define STS1_EXT_FAULT … #define STS1_SERVICE_LED_ON … #define STS1_SHUTDOWN_OCCURRED … #define STS1_INT_FAULT … #define STS1_ISOLATION_TEST_OK … #define STS2_ENABLE_PIN_HI … #define STS2_DATA_OUT_RANGE … #define STS2_RESTARTED_OK … #define STS2_ISOLATION_TEST_FAIL … #define STS2_HIGH_POWER_CAP … #define STS2_INVALID_INSTR … #define STS2_WILL_RESTART … #define STS2_PEC_ERR … /* Alarm register bits */ #define ALRM1_VIN_OUT_LIMIT … #define ALRM1_VOUT_OUT_LIMIT … #define ALRM1_OV_VOLT_SHUTDOWN … #define ALRM1_VIN_OVERCURRENT … #define ALRM1_TEMP_WARNING … #define ALRM1_TEMP_SHUTDOWN … #define ALRM1_PRIMARY_FAULT … #define ALRM1_POWER_LIMIT … #define ALRM2_5V_OUT_LIMIT … #define ALRM2_TEMP_FAULT … #define ALRM2_OV_LOW … #define ALRM2_DCDC_TEMP_HIGH … #define ALRM2_PRI_TEMP_HIGH … #define ALRM2_NO_PRIMARY … #define ALRM2_FAN_FAULT … #define FIRMWARE_REV_LEN … #define DATA_STRING_LEN … #define INPUT_STRING_LEN … #define FAN_SPEED_LEN … struct pem_data { … }; static int pem_read_block(struct i2c_client *client, u8 command, u8 *data, int data_len) { … } static struct pem_data *pem_update_device(struct device *dev) { … } static long pem_get_data(u8 *data, int len, int index) { … } static long pem_get_input(u8 *data, int len, int index) { … } static long pem_get_fan(u8 *data, int len, int index) { … } /* * Show boolean, either a fault or an alarm. * .nr points to the register, .index is the bit mask to check */ static ssize_t pem_bool_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t pem_data_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t pem_input_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t pem_fan_show(struct device *dev, struct device_attribute *da, char *buf) { … } /* Voltages */ static SENSOR_DEVICE_ATTR_RO(in1_input, pem_data, PEM_DATA_VOUT_LSB); static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, pem_bool, PEM_DATA_ALARM_1, ALRM1_VOUT_OUT_LIMIT); static SENSOR_DEVICE_ATTR_2_RO(in1_crit_alarm, pem_bool, PEM_DATA_ALARM_1, ALRM1_OV_VOLT_SHUTDOWN); static SENSOR_DEVICE_ATTR_RO(in2_input, pem_input, PEM_INPUT_VOLTAGE); static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, pem_bool, PEM_DATA_ALARM_1, ALRM1_VIN_OUT_LIMIT | ALRM1_PRIMARY_FAULT); /* Currents */ static SENSOR_DEVICE_ATTR_RO(curr1_input, pem_data, PEM_DATA_CURRENT); static SENSOR_DEVICE_ATTR_2_RO(curr1_alarm, pem_bool, PEM_DATA_ALARM_1, ALRM1_VIN_OVERCURRENT); /* Power */ static SENSOR_DEVICE_ATTR_RO(power1_input, pem_input, PEM_INPUT_POWER_LSB); static SENSOR_DEVICE_ATTR_2_RO(power1_alarm, pem_bool, PEM_DATA_ALARM_1, ALRM1_POWER_LIMIT); /* Fans */ static SENSOR_DEVICE_ATTR_RO(fan1_input, pem_fan, PEM_FAN_FAN1); static SENSOR_DEVICE_ATTR_RO(fan2_input, pem_fan, PEM_FAN_FAN2); static SENSOR_DEVICE_ATTR_RO(fan3_input, pem_fan, PEM_FAN_FAN3); static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, pem_bool, PEM_DATA_ALARM_2, ALRM2_FAN_FAULT); /* Temperatures */ static SENSOR_DEVICE_ATTR_RO(temp1_input, pem_data, PEM_DATA_TEMP); static SENSOR_DEVICE_ATTR_RO(temp1_max, pem_data, PEM_DATA_TEMP_MAX); static SENSOR_DEVICE_ATTR_RO(temp1_crit, pem_data, PEM_DATA_TEMP_CRIT); static SENSOR_DEVICE_ATTR_2_RO(temp1_alarm, pem_bool, PEM_DATA_ALARM_1, ALRM1_TEMP_WARNING); static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, pem_bool, PEM_DATA_ALARM_1, ALRM1_TEMP_SHUTDOWN); static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, pem_bool, PEM_DATA_ALARM_2, ALRM2_TEMP_FAULT); static struct attribute *pem_attributes[] = …; static const struct attribute_group pem_group = …; static struct attribute *pem_input_attributes[] = …; static const struct attribute_group pem_input_group = …; static struct attribute *pem_fan_attributes[] = …; static const struct attribute_group pem_fan_group = …; static int pem_probe(struct i2c_client *client) { … } static const struct i2c_device_id pem_id[] = …; MODULE_DEVICE_TABLE(i2c, pem_id); static struct i2c_driver pem_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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