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path: root/drivers/hwmon/pmbus/inspur-ipsps.c
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-rw-r--r--drivers/hwmon/pmbus/inspur-ipsps.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/inspur-ipsps.c b/drivers/hwmon/pmbus/inspur-ipsps.c
new file mode 100644
index 000000000..0f614e8d9
--- /dev/null
+++ b/drivers/hwmon/pmbus/inspur-ipsps.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2019 Inspur Corp.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pmbus.h>
+#include <linux/hwmon-sysfs.h>
+
+#include "pmbus.h"
+
+#define IPSPS_REG_VENDOR_ID 0x99
+#define IPSPS_REG_MODEL 0x9A
+#define IPSPS_REG_FW_VERSION 0x9B
+#define IPSPS_REG_PN 0x9C
+#define IPSPS_REG_SN 0x9E
+#define IPSPS_REG_HW_VERSION 0xB0
+#define IPSPS_REG_MODE 0xFC
+
+#define MODE_ACTIVE 0x55
+#define MODE_STANDBY 0x0E
+#define MODE_REDUNDANCY 0x00
+
+#define MODE_ACTIVE_STRING "active"
+#define MODE_STANDBY_STRING "standby"
+#define MODE_REDUNDANCY_STRING "redundancy"
+
+enum ipsps_index {
+ vendor,
+ model,
+ fw_version,
+ part_number,
+ serial_number,
+ hw_version,
+ mode,
+ num_regs,
+};
+
+static const u8 ipsps_regs[num_regs] = {
+ [vendor] = IPSPS_REG_VENDOR_ID,
+ [model] = IPSPS_REG_MODEL,
+ [fw_version] = IPSPS_REG_FW_VERSION,
+ [part_number] = IPSPS_REG_PN,
+ [serial_number] = IPSPS_REG_SN,
+ [hw_version] = IPSPS_REG_HW_VERSION,
+ [mode] = IPSPS_REG_MODE,
+};
+
+static ssize_t ipsps_string_show(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ u8 reg;
+ int rc;
+ char *p;
+ char data[I2C_SMBUS_BLOCK_MAX + 1];
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+ reg = ipsps_regs[attr->index];
+ rc = i2c_smbus_read_block_data(client, reg, data);
+ if (rc < 0)
+ return rc;
+
+ /* filled with printable characters, ending with # */
+ p = memscan(data, '#', rc);
+ *p = '\0';
+
+ return sysfs_emit(buf, "%s\n", data);
+}
+
+static ssize_t ipsps_fw_version_show(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ u8 reg;
+ int rc;
+ u8 data[I2C_SMBUS_BLOCK_MAX] = { 0 };
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+ reg = ipsps_regs[attr->index];
+ rc = i2c_smbus_read_block_data(client, reg, data);
+ if (rc < 0)
+ return rc;
+
+ if (rc != 6)
+ return -EPROTO;
+
+ return sysfs_emit(buf, "%u.%02u%u-%u.%02u\n",
+ data[1], data[2]/* < 100 */, data[3]/*< 10*/,
+ data[4], data[5]/* < 100 */);
+}
+
+static ssize_t ipsps_mode_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ u8 reg;
+ int rc;
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+ reg = ipsps_regs[attr->index];
+ rc = i2c_smbus_read_byte_data(client, reg);
+ if (rc < 0)
+ return rc;
+
+ switch (rc) {
+ case MODE_ACTIVE:
+ return sysfs_emit(buf, "[%s] %s %s\n",
+ MODE_ACTIVE_STRING,
+ MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
+ case MODE_STANDBY:
+ return sysfs_emit(buf, "%s [%s] %s\n",
+ MODE_ACTIVE_STRING,
+ MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
+ case MODE_REDUNDANCY:
+ return sysfs_emit(buf, "%s %s [%s]\n",
+ MODE_ACTIVE_STRING,
+ MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
+ default:
+ return sysfs_emit(buf, "unspecified\n");
+ }
+}
+
+static ssize_t ipsps_mode_store(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ u8 reg;
+ int rc;
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+ reg = ipsps_regs[attr->index];
+ if (sysfs_streq(MODE_STANDBY_STRING, buf)) {
+ rc = i2c_smbus_write_byte_data(client, reg,
+ MODE_STANDBY);
+ if (rc < 0)
+ return rc;
+ return count;
+ } else if (sysfs_streq(MODE_ACTIVE_STRING, buf)) {
+ rc = i2c_smbus_write_byte_data(client, reg,
+ MODE_ACTIVE);
+ if (rc < 0)
+ return rc;
+ return count;
+ }
+
+ return -EINVAL;
+}
+
+static SENSOR_DEVICE_ATTR_RO(vendor, ipsps_string, vendor);
+static SENSOR_DEVICE_ATTR_RO(model, ipsps_string, model);
+static SENSOR_DEVICE_ATTR_RO(part_number, ipsps_string, part_number);
+static SENSOR_DEVICE_ATTR_RO(serial_number, ipsps_string, serial_number);
+static SENSOR_DEVICE_ATTR_RO(hw_version, ipsps_string, hw_version);
+static SENSOR_DEVICE_ATTR_RO(fw_version, ipsps_fw_version, fw_version);
+static SENSOR_DEVICE_ATTR_RW(mode, ipsps_mode, mode);
+
+static struct attribute *ipsps_attrs[] = {
+ &sensor_dev_attr_vendor.dev_attr.attr,
+ &sensor_dev_attr_model.dev_attr.attr,
+ &sensor_dev_attr_part_number.dev_attr.attr,
+ &sensor_dev_attr_serial_number.dev_attr.attr,
+ &sensor_dev_attr_hw_version.dev_attr.attr,
+ &sensor_dev_attr_fw_version.dev_attr.attr,
+ &sensor_dev_attr_mode.dev_attr.attr,
+ NULL,
+};
+
+ATTRIBUTE_GROUPS(ipsps);
+
+static struct pmbus_driver_info ipsps_info = {
+ .pages = 1,
+ .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
+ PMBUS_HAVE_IIN | PMBUS_HAVE_POUT | PMBUS_HAVE_PIN |
+ PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
+ PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |
+ PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
+ PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12,
+ .groups = ipsps_groups,
+};
+
+static struct pmbus_platform_data ipsps_pdata = {
+ .flags = PMBUS_SKIP_STATUS_CHECK,
+};
+
+static int ipsps_probe(struct i2c_client *client)
+{
+ client->dev.platform_data = &ipsps_pdata;
+ return pmbus_do_probe(client, &ipsps_info);
+}
+
+static const struct i2c_device_id ipsps_id[] = {
+ { "ipsps1", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ipsps_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id ipsps_of_match[] = {
+ { .compatible = "inspur,ipsps1" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ipsps_of_match);
+#endif
+
+static struct i2c_driver ipsps_driver = {
+ .driver = {
+ .name = "inspur-ipsps",
+ .of_match_table = of_match_ptr(ipsps_of_match),
+ },
+ .probe_new = ipsps_probe,
+ .id_table = ipsps_id,
+};
+
+module_i2c_driver(ipsps_driver);
+
+MODULE_AUTHOR("John Wang");
+MODULE_DESCRIPTION("PMBus driver for Inspur Power System power supplies");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);