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![John Wang](/assets/img/avatar_default.png)
Add the driver to monitor Inspur Power System power supplies with hwmon over pmbus. This driver adds sysfs attributes for additional power supply data, including vendor, model, part_number, serial number, firmware revision, hardware revision, and psu mode(active/standby). Signed-off-by: John Wang <wangzqbj@inspur.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20190819091509.29276-1-wangzqbj@inspur.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
228 lines
5.8 KiB
C
228 lines
5.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2019 Inspur Corp.
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*/
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/pmbus.h>
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#include <linux/hwmon-sysfs.h>
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#include "pmbus.h"
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#define IPSPS_REG_VENDOR_ID 0x99
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#define IPSPS_REG_MODEL 0x9A
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#define IPSPS_REG_FW_VERSION 0x9B
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#define IPSPS_REG_PN 0x9C
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#define IPSPS_REG_SN 0x9E
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#define IPSPS_REG_HW_VERSION 0xB0
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#define IPSPS_REG_MODE 0xFC
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#define MODE_ACTIVE 0x55
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#define MODE_STANDBY 0x0E
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#define MODE_REDUNDANCY 0x00
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#define MODE_ACTIVE_STRING "active"
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#define MODE_STANDBY_STRING "standby"
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#define MODE_REDUNDANCY_STRING "redundancy"
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enum ipsps_index {
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vendor,
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model,
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fw_version,
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part_number,
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serial_number,
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hw_version,
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mode,
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num_regs,
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};
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static const u8 ipsps_regs[num_regs] = {
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[vendor] = IPSPS_REG_VENDOR_ID,
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[model] = IPSPS_REG_MODEL,
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[fw_version] = IPSPS_REG_FW_VERSION,
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[part_number] = IPSPS_REG_PN,
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[serial_number] = IPSPS_REG_SN,
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[hw_version] = IPSPS_REG_HW_VERSION,
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[mode] = IPSPS_REG_MODE,
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};
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static ssize_t ipsps_string_show(struct device *dev,
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struct device_attribute *devattr,
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char *buf)
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{
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u8 reg;
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int rc;
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char *p;
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char data[I2C_SMBUS_BLOCK_MAX + 1];
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struct i2c_client *client = to_i2c_client(dev->parent);
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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reg = ipsps_regs[attr->index];
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rc = i2c_smbus_read_block_data(client, reg, data);
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if (rc < 0)
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return rc;
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/* filled with printable characters, ending with # */
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p = memscan(data, '#', rc);
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*p = '\0';
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return snprintf(buf, PAGE_SIZE, "%s\n", data);
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}
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static ssize_t ipsps_fw_version_show(struct device *dev,
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struct device_attribute *devattr,
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char *buf)
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{
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u8 reg;
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int rc;
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u8 data[I2C_SMBUS_BLOCK_MAX] = { 0 };
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struct i2c_client *client = to_i2c_client(dev->parent);
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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reg = ipsps_regs[attr->index];
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rc = i2c_smbus_read_block_data(client, reg, data);
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if (rc < 0)
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return rc;
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if (rc != 6)
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return -EPROTO;
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return snprintf(buf, PAGE_SIZE, "%u.%02u%u-%u.%02u\n",
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data[1], data[2]/* < 100 */, data[3]/*< 10*/,
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data[4], data[5]/* < 100 */);
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}
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static ssize_t ipsps_mode_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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u8 reg;
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int rc;
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struct i2c_client *client = to_i2c_client(dev->parent);
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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reg = ipsps_regs[attr->index];
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rc = i2c_smbus_read_byte_data(client, reg);
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if (rc < 0)
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return rc;
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switch (rc) {
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case MODE_ACTIVE:
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return snprintf(buf, PAGE_SIZE, "[%s] %s %s\n",
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MODE_ACTIVE_STRING,
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MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
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case MODE_STANDBY:
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return snprintf(buf, PAGE_SIZE, "%s [%s] %s\n",
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MODE_ACTIVE_STRING,
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MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
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case MODE_REDUNDANCY:
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return snprintf(buf, PAGE_SIZE, "%s %s [%s]\n",
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MODE_ACTIVE_STRING,
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MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
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default:
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return snprintf(buf, PAGE_SIZE, "unspecified\n");
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}
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}
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static ssize_t ipsps_mode_store(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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u8 reg;
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int rc;
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struct i2c_client *client = to_i2c_client(dev->parent);
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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reg = ipsps_regs[attr->index];
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if (sysfs_streq(MODE_STANDBY_STRING, buf)) {
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rc = i2c_smbus_write_byte_data(client, reg,
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MODE_STANDBY);
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if (rc < 0)
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return rc;
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return count;
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} else if (sysfs_streq(MODE_ACTIVE_STRING, buf)) {
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rc = i2c_smbus_write_byte_data(client, reg,
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MODE_ACTIVE);
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if (rc < 0)
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return rc;
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return count;
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}
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return -EINVAL;
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}
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static SENSOR_DEVICE_ATTR_RO(vendor, ipsps_string, vendor);
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static SENSOR_DEVICE_ATTR_RO(model, ipsps_string, model);
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static SENSOR_DEVICE_ATTR_RO(part_number, ipsps_string, part_number);
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static SENSOR_DEVICE_ATTR_RO(serial_number, ipsps_string, serial_number);
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static SENSOR_DEVICE_ATTR_RO(hw_version, ipsps_string, hw_version);
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static SENSOR_DEVICE_ATTR_RO(fw_version, ipsps_fw_version, fw_version);
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static SENSOR_DEVICE_ATTR_RW(mode, ipsps_mode, mode);
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static struct attribute *ipsps_attrs[] = {
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&sensor_dev_attr_vendor.dev_attr.attr,
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&sensor_dev_attr_model.dev_attr.attr,
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&sensor_dev_attr_part_number.dev_attr.attr,
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&sensor_dev_attr_serial_number.dev_attr.attr,
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&sensor_dev_attr_hw_version.dev_attr.attr,
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&sensor_dev_attr_fw_version.dev_attr.attr,
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&sensor_dev_attr_mode.dev_attr.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(ipsps);
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static struct pmbus_driver_info ipsps_info = {
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.pages = 1,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
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PMBUS_HAVE_IIN | PMBUS_HAVE_POUT | PMBUS_HAVE_PIN |
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PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
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PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
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PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12,
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.groups = ipsps_groups,
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};
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static struct pmbus_platform_data ipsps_pdata = {
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.flags = PMBUS_SKIP_STATUS_CHECK,
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};
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static int ipsps_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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client->dev.platform_data = &ipsps_pdata;
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return pmbus_do_probe(client, id, &ipsps_info);
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}
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static const struct i2c_device_id ipsps_id[] = {
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{ "ipsps1", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ipsps_id);
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#ifdef CONFIG_OF
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static const struct of_device_id ipsps_of_match[] = {
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{ .compatible = "inspur,ipsps1" },
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{}
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};
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MODULE_DEVICE_TABLE(of, ipsps_of_match);
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#endif
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static struct i2c_driver ipsps_driver = {
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.driver = {
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.name = "inspur-ipsps",
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.of_match_table = of_match_ptr(ipsps_of_match),
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},
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.probe = ipsps_probe,
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.remove = pmbus_do_remove,
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.id_table = ipsps_id,
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};
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module_i2c_driver(ipsps_driver);
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MODULE_AUTHOR("John Wang");
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MODULE_DESCRIPTION("PMBus driver for Inspur Power System power supplies");
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MODULE_LICENSE("GPL");
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