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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright 2019 Inspur Corp.4 */5 6#include <linux/debugfs.h>7#include <linux/device.h>8#include <linux/fs.h>9#include <linux/i2c.h>10#include <linux/module.h>11#include <linux/pmbus.h>12#include <linux/hwmon-sysfs.h>13 14#include "pmbus.h"15 16#define IPSPS_REG_VENDOR_ID 0x9917#define IPSPS_REG_MODEL 0x9A18#define IPSPS_REG_FW_VERSION 0x9B19#define IPSPS_REG_PN 0x9C20#define IPSPS_REG_SN 0x9E21#define IPSPS_REG_HW_VERSION 0xB022#define IPSPS_REG_MODE 0xFC23 24#define MODE_ACTIVE 0x5525#define MODE_STANDBY 0x0E26#define MODE_REDUNDANCY 0x0027 28#define MODE_ACTIVE_STRING "active"29#define MODE_STANDBY_STRING "standby"30#define MODE_REDUNDANCY_STRING "redundancy"31 32enum ipsps_index {33 vendor,34 model,35 fw_version,36 part_number,37 serial_number,38 hw_version,39 mode,40 num_regs,41};42 43static const u8 ipsps_regs[num_regs] = {44 [vendor] = IPSPS_REG_VENDOR_ID,45 [model] = IPSPS_REG_MODEL,46 [fw_version] = IPSPS_REG_FW_VERSION,47 [part_number] = IPSPS_REG_PN,48 [serial_number] = IPSPS_REG_SN,49 [hw_version] = IPSPS_REG_HW_VERSION,50 [mode] = IPSPS_REG_MODE,51};52 53static ssize_t ipsps_string_show(struct device *dev,54 struct device_attribute *devattr,55 char *buf)56{57 u8 reg;58 int rc;59 char *p;60 char data[I2C_SMBUS_BLOCK_MAX + 1];61 struct i2c_client *client = to_i2c_client(dev->parent);62 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);63 64 reg = ipsps_regs[attr->index];65 rc = i2c_smbus_read_block_data(client, reg, data);66 if (rc < 0)67 return rc;68 69 /* filled with printable characters, ending with # */70 p = memscan(data, '#', rc);71 *p = '\0';72 73 return sysfs_emit(buf, "%s\n", data);74}75 76static ssize_t ipsps_fw_version_show(struct device *dev,77 struct device_attribute *devattr,78 char *buf)79{80 u8 reg;81 int rc;82 u8 data[I2C_SMBUS_BLOCK_MAX] = { 0 };83 struct i2c_client *client = to_i2c_client(dev->parent);84 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);85 86 reg = ipsps_regs[attr->index];87 rc = i2c_smbus_read_block_data(client, reg, data);88 if (rc < 0)89 return rc;90 91 if (rc != 6)92 return -EPROTO;93 94 return sysfs_emit(buf, "%u.%02u%u-%u.%02u\n",95 data[1], data[2]/* < 100 */, data[3]/*< 10*/,96 data[4], data[5]/* < 100 */);97}98 99static ssize_t ipsps_mode_show(struct device *dev,100 struct device_attribute *devattr, char *buf)101{102 u8 reg;103 int rc;104 struct i2c_client *client = to_i2c_client(dev->parent);105 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);106 107 reg = ipsps_regs[attr->index];108 rc = i2c_smbus_read_byte_data(client, reg);109 if (rc < 0)110 return rc;111 112 switch (rc) {113 case MODE_ACTIVE:114 return sysfs_emit(buf, "[%s] %s %s\n",115 MODE_ACTIVE_STRING,116 MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);117 case MODE_STANDBY:118 return sysfs_emit(buf, "%s [%s] %s\n",119 MODE_ACTIVE_STRING,120 MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);121 case MODE_REDUNDANCY:122 return sysfs_emit(buf, "%s %s [%s]\n",123 MODE_ACTIVE_STRING,124 MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);125 default:126 return sysfs_emit(buf, "unspecified\n");127 }128}129 130static ssize_t ipsps_mode_store(struct device *dev,131 struct device_attribute *devattr,132 const char *buf, size_t count)133{134 u8 reg;135 int rc;136 struct i2c_client *client = to_i2c_client(dev->parent);137 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);138 139 reg = ipsps_regs[attr->index];140 if (sysfs_streq(MODE_STANDBY_STRING, buf)) {141 rc = i2c_smbus_write_byte_data(client, reg,142 MODE_STANDBY);143 if (rc < 0)144 return rc;145 return count;146 } else if (sysfs_streq(MODE_ACTIVE_STRING, buf)) {147 rc = i2c_smbus_write_byte_data(client, reg,148 MODE_ACTIVE);149 if (rc < 0)150 return rc;151 return count;152 }153 154 return -EINVAL;155}156 157static SENSOR_DEVICE_ATTR_RO(vendor, ipsps_string, vendor);158static SENSOR_DEVICE_ATTR_RO(model, ipsps_string, model);159static SENSOR_DEVICE_ATTR_RO(part_number, ipsps_string, part_number);160static SENSOR_DEVICE_ATTR_RO(serial_number, ipsps_string, serial_number);161static SENSOR_DEVICE_ATTR_RO(hw_version, ipsps_string, hw_version);162static SENSOR_DEVICE_ATTR_RO(fw_version, ipsps_fw_version, fw_version);163static SENSOR_DEVICE_ATTR_RW(mode, ipsps_mode, mode);164 165static struct attribute *ipsps_attrs[] = {166 &sensor_dev_attr_vendor.dev_attr.attr,167 &sensor_dev_attr_model.dev_attr.attr,168 &sensor_dev_attr_part_number.dev_attr.attr,169 &sensor_dev_attr_serial_number.dev_attr.attr,170 &sensor_dev_attr_hw_version.dev_attr.attr,171 &sensor_dev_attr_fw_version.dev_attr.attr,172 &sensor_dev_attr_mode.dev_attr.attr,173 NULL,174};175 176ATTRIBUTE_GROUPS(ipsps);177 178static struct pmbus_driver_info ipsps_info = {179 .pages = 1,180 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |181 PMBUS_HAVE_IIN | PMBUS_HAVE_POUT | PMBUS_HAVE_PIN |182 PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |183 PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |184 PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |185 PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12,186 .groups = ipsps_groups,187};188 189static struct pmbus_platform_data ipsps_pdata = {190 .flags = PMBUS_SKIP_STATUS_CHECK,191};192 193static int ipsps_probe(struct i2c_client *client)194{195 client->dev.platform_data = &ipsps_pdata;196 return pmbus_do_probe(client, &ipsps_info);197}198 199static const struct i2c_device_id ipsps_id[] = {200 { "ipsps1" },201 {}202};203MODULE_DEVICE_TABLE(i2c, ipsps_id);204 205#ifdef CONFIG_OF206static const struct of_device_id ipsps_of_match[] = {207 { .compatible = "inspur,ipsps1" },208 {}209};210MODULE_DEVICE_TABLE(of, ipsps_of_match);211#endif212 213static struct i2c_driver ipsps_driver = {214 .driver = {215 .name = "inspur-ipsps",216 .of_match_table = of_match_ptr(ipsps_of_match),217 },218 .probe = ipsps_probe,219 .id_table = ipsps_id,220};221 222module_i2c_driver(ipsps_driver);223 224MODULE_AUTHOR("John Wang");225MODULE_DESCRIPTION("PMBus driver for Inspur Power System power supplies");226MODULE_LICENSE("GPL");227MODULE_IMPORT_NS(PMBUS);228