1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Hardware monitoring driver for BluTek BPA-RS600 Power Supplies
5 * Copyright 2021 Allied Telesis Labs
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/pmbus.h>
15 #define BPARS600_MFR_VIN_MIN 0xa0
16 #define BPARS600_MFR_VIN_MAX 0xa1
17 #define BPARS600_MFR_IIN_MAX 0xa2
18 #define BPARS600_MFR_PIN_MAX 0xa3
19 #define BPARS600_MFR_VOUT_MIN 0xa4
20 #define BPARS600_MFR_VOUT_MAX 0xa5
21 #define BPARS600_MFR_IOUT_MAX 0xa6
22 #define BPARS600_MFR_POUT_MAX 0xa7
24 static int bpa_rs600_read_byte_data(struct i2c_client *client, int page, int reg)
32 case PMBUS_FAN_CONFIG_12:
34 * Two fans are reported in PMBUS_FAN_CONFIG_12 but there is
35 * only one fan in the module. Mask out the FAN2 bits.
37 ret = pmbus_read_byte_data(client, 0, PMBUS_FAN_CONFIG_12);
39 ret &= ~(PB_FAN_2_INSTALLED | PB_FAN_2_PULSE_MASK);
49 static int bpa_rs600_read_word_data(struct i2c_client *client, int page, int phase, int reg)
57 case PMBUS_VIN_UV_WARN_LIMIT:
58 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MIN);
60 case PMBUS_VIN_OV_WARN_LIMIT:
61 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MAX);
63 case PMBUS_VOUT_UV_WARN_LIMIT:
64 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MIN);
66 case PMBUS_VOUT_OV_WARN_LIMIT:
67 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MAX);
69 case PMBUS_IIN_OC_WARN_LIMIT:
70 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IIN_MAX);
72 case PMBUS_IOUT_OC_WARN_LIMIT:
73 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IOUT_MAX);
75 case PMBUS_PIN_OP_WARN_LIMIT:
76 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_PIN_MAX);
78 case PMBUS_POUT_OP_WARN_LIMIT:
79 ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_POUT_MAX);
81 case PMBUS_VIN_UV_FAULT_LIMIT:
82 case PMBUS_VIN_OV_FAULT_LIMIT:
83 case PMBUS_VOUT_UV_FAULT_LIMIT:
84 case PMBUS_VOUT_OV_FAULT_LIMIT:
85 /* These commands return data but it is invalid/un-documented */
89 if (reg >= PMBUS_VIRT_BASE)
99 static struct pmbus_driver_info bpa_rs600_info = {
101 .format[PSC_VOLTAGE_IN] = linear,
102 .format[PSC_VOLTAGE_OUT] = linear,
103 .format[PSC_CURRENT_IN] = linear,
104 .format[PSC_CURRENT_OUT] = linear,
105 .format[PSC_POWER] = linear,
106 .format[PSC_TEMPERATURE] = linear,
107 .format[PSC_FAN] = linear,
108 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT |
109 PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT |
110 PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
111 PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
113 PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
114 PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
115 PMBUS_HAVE_STATUS_FAN12,
116 .read_byte_data = bpa_rs600_read_byte_data,
117 .read_word_data = bpa_rs600_read_word_data,
120 static int bpa_rs600_probe(struct i2c_client *client)
122 struct device *dev = &client->dev;
123 u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
126 if (!i2c_check_functionality(client->adapter,
127 I2C_FUNC_SMBUS_READ_BYTE_DATA
128 | I2C_FUNC_SMBUS_READ_WORD_DATA
129 | I2C_FUNC_SMBUS_READ_BLOCK_DATA))
132 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
134 dev_err(dev, "Failed to read Manufacturer Model\n");
138 if (strncmp(buf, "BPA-RS600", 8)) {
140 dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
144 return pmbus_do_probe(client, &bpa_rs600_info);
147 static const struct i2c_device_id bpa_rs600_id[] = {
151 MODULE_DEVICE_TABLE(i2c, bpa_rs600_id);
153 static const struct of_device_id __maybe_unused bpa_rs600_of_match[] = {
154 { .compatible = "blutek,bpa-rs600" },
157 MODULE_DEVICE_TABLE(of, bpa_rs600_of_match);
159 static struct i2c_driver bpa_rs600_driver = {
162 .of_match_table = of_match_ptr(bpa_rs600_of_match),
164 .probe_new = bpa_rs600_probe,
165 .id_table = bpa_rs600_id,
168 module_i2c_driver(bpa_rs600_driver);
170 MODULE_AUTHOR("Chris Packham");
171 MODULE_DESCRIPTION("PMBus driver for BluTek BPA-RS600");
172 MODULE_LICENSE("GPL");
173 MODULE_IMPORT_NS(PMBUS);