projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 61052652 VP |
1 | /* |
| 2 | * Hardware monitoring driver for Texas Instruments TPS53679 | |
| 3 | * | |
| 4 | * Copyright (c) 2017 Mellanox Technologies. All rights reserved. | |
| 5 | * Copyright (c) 2017 Vadim Pasternak <vadimp@mellanox.com> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2 of the License, or | |
| 10 | * (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/err.h> | |
| 19 | #include <linux/i2c.h> | |
| 20 | #include <linux/init.h> | |
| 21 | #include <linux/kernel.h> | |
| 22 | #include <linux/module.h> | |
| 23 | #include "pmbus.h" | |
| 24 | ||
| 25 | #define TPS53679_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */ | |
| 26 | #define TPS53679_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */ | |
| 27 | #define TPS53679_PROT_VR13_10MV 0x04 /* VR13.0 mode, 10-mV DAC */ | |
| 28 | #define TPS53679_PROT_IMVP8_5MV 0x05 /* IMVP8 mode, 5-mV DAC */ | |
| 29 | #define TPS53679_PROT_VR13_5MV 0x07 /* VR13.0 mode, 5-mV DAC */ | |
| 30 | #define TPS53679_PAGE_NUM 2 | |
| 31 | ||
| 32 | static int tps53679_identify(struct i2c_client *client, | |
| 33 | struct pmbus_driver_info *info) | |
| 34 | { | |
| 35 | u8 vout_params; | |
| 36 | int ret; | |
| 37 | ||
| 38 | /* Read the register with VOUT scaling value.*/ | |
| 39 | ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); | |
| 40 | if (ret < 0) | |
| 41 | return ret; | |
| 42 | ||
| 43 | vout_params = ret & GENMASK(4, 0); | |
| 44 | ||
| 45 | switch (vout_params) { | |
| 46 | case TPS53679_PROT_VR13_10MV: | |
| 47 | case TPS53679_PROT_VR12_5_10MV: | |
| 48 | info->vrm_version = vr13; | |
| 49 | break; | |
| 50 | case TPS53679_PROT_VR13_5MV: | |
| 51 | case TPS53679_PROT_VR12_5MV: | |
| 52 | case TPS53679_PROT_IMVP8_5MV: | |
| 53 | info->vrm_version = vr12; | |
| 54 | break; | |
| 55 | default: | |
| 56 | return -EINVAL; | |
| 57 | } | |
| 58 | ||
| 59 | return 0; | |
| 60 | } | |
| 61 | ||
| 62 | static struct pmbus_driver_info tps53679_info = { | |
| 63 | .pages = TPS53679_PAGE_NUM, | |
| 64 | .format[PSC_VOLTAGE_IN] = linear, | |
| 65 | .format[PSC_VOLTAGE_OUT] = vid, | |
| 66 | .format[PSC_TEMPERATURE] = linear, | |
| 67 | .format[PSC_CURRENT_OUT] = linear, | |
| 68 | .format[PSC_POWER] = linear, | |
| 69 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | | |
| 70 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | | |
| 71 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | | |
| 72 | PMBUS_HAVE_POUT, | |
| 73 | .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | | |
| 74 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | | |
| 75 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | | |
| 76 | PMBUS_HAVE_POUT, | |
| 77 | .identify = tps53679_identify, | |
| 78 | }; | |
| 79 | ||
| 80 | static int tps53679_probe(struct i2c_client *client, | |
| 81 | const struct i2c_device_id *id) | |
| 82 | { | |
| 83 | return pmbus_do_probe(client, id, &tps53679_info); | |
| 84 | } | |
| 85 | ||
| 86 | static const struct i2c_device_id tps53679_id[] = { | |
| 87 | {"tps53679", 0}, | |
| 88 | {} | |
| 89 | }; | |
| 90 | ||
| 91 | MODULE_DEVICE_TABLE(i2c, tps53679_id); | |
| 92 | ||
| 93 | static const struct of_device_id tps53679_of_match[] = { | |
| 94 | {.compatible = "ti,tps53679"}, | |
| 95 | {} | |
| 96 | }; | |
| 97 | MODULE_DEVICE_TABLE(of, tps53679_of_match); | |
| 98 | ||
| 99 | static struct i2c_driver tps53679_driver = { | |
| 100 | .driver = { | |
| 101 | .name = "tps53679", | |
| 102 | .of_match_table = of_match_ptr(tps53679_of_match), | |
| 103 | }, | |
| 104 | .probe = tps53679_probe, | |
| 105 | .remove = pmbus_do_remove, | |
| 106 | .id_table = tps53679_id, | |
| 107 | }; | |
| 108 | ||
| 109 | module_i2c_driver(tps53679_driver); | |
| 110 | ||
| 111 | MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>"); | |
| 112 | MODULE_DESCRIPTION("PMBus driver for Texas Instruments TPS53679"); | |
| 113 | MODULE_LICENSE("GPL"); |