projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 61052652 VP |
2 | /* |
| 3 | * Hardware monitoring driver for Texas Instruments TPS53679 | |
| 4 | * | |
| 5 | * Copyright (c) 2017 Mellanox Technologies. All rights reserved. | |
| 6 | * Copyright (c) 2017 Vadim Pasternak <vadimp@mellanox.com> | |
| 61052652 VP |
7 | */ |
| 8 | ||
| 9 | #include <linux/err.h> | |
| 10 | #include <linux/i2c.h> | |
| 11 | #include <linux/init.h> | |
| 12 | #include <linux/kernel.h> | |
| 13 | #include <linux/module.h> | |
| 14 | #include "pmbus.h" | |
| 15 | ||
| 16 | #define TPS53679_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */ | |
| 17 | #define TPS53679_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */ | |
| 18 | #define TPS53679_PROT_VR13_10MV 0x04 /* VR13.0 mode, 10-mV DAC */ | |
| 19 | #define TPS53679_PROT_IMVP8_5MV 0x05 /* IMVP8 mode, 5-mV DAC */ | |
| 20 | #define TPS53679_PROT_VR13_5MV 0x07 /* VR13.0 mode, 5-mV DAC */ | |
| 21 | #define TPS53679_PAGE_NUM 2 | |
| 22 | ||
| 23 | static int tps53679_identify(struct i2c_client *client, | |
| 24 | struct pmbus_driver_info *info) | |
| 25 | { | |
| 26 | u8 vout_params; | |
| 27 | int ret; | |
| 28 | ||
| 29 | /* Read the register with VOUT scaling value.*/ | |
| 30 | ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); | |
| 31 | if (ret < 0) | |
| 32 | return ret; | |
| 33 | ||
| 34 | vout_params = ret & GENMASK(4, 0); | |
| 35 | ||
| 36 | switch (vout_params) { | |
| 37 | case TPS53679_PROT_VR13_10MV: | |
| 38 | case TPS53679_PROT_VR12_5_10MV: | |
| 39 | info->vrm_version = vr13; | |
| 40 | break; | |
| 41 | case TPS53679_PROT_VR13_5MV: | |
| 42 | case TPS53679_PROT_VR12_5MV: | |
| 43 | case TPS53679_PROT_IMVP8_5MV: | |
| 44 | info->vrm_version = vr12; | |
| 45 | break; | |
| 46 | default: | |
| 47 | return -EINVAL; | |
| 48 | } | |
| 49 | ||
| 50 | return 0; | |
| 51 | } | |
| 52 | ||
| 53 | static struct pmbus_driver_info tps53679_info = { | |
| 54 | .pages = TPS53679_PAGE_NUM, | |
| 55 | .format[PSC_VOLTAGE_IN] = linear, | |
| 56 | .format[PSC_VOLTAGE_OUT] = vid, | |
| 57 | .format[PSC_TEMPERATURE] = linear, | |
| 58 | .format[PSC_CURRENT_OUT] = linear, | |
| 59 | .format[PSC_POWER] = linear, | |
| 60 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | | |
| 61 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | | |
| 62 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | | |
| 63 | PMBUS_HAVE_POUT, | |
| 64 | .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | | |
| 65 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | | |
| 66 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | | |
| 67 | PMBUS_HAVE_POUT, | |
| 68 | .identify = tps53679_identify, | |
| 69 | }; | |
| 70 | ||
| 71 | static int tps53679_probe(struct i2c_client *client, | |
| 72 | const struct i2c_device_id *id) | |
| 73 | { | |
| ff066653 VP |
74 | struct pmbus_driver_info *info; |
| 75 | ||
| 76 | info = devm_kmemdup(&client->dev, &tps53679_info, sizeof(*info), | |
| 77 | GFP_KERNEL); | |
| 78 | if (!info) | |
| 79 | return -ENOMEM; | |
| 80 | ||
| 81 | return pmbus_do_probe(client, id, info); | |
| 61052652 VP |
82 | } |
| 83 | ||
| 84 | static const struct i2c_device_id tps53679_id[] = { | |
| 85 | {"tps53679", 0}, | |
| 86 | {} | |
| 87 | }; | |
| 88 | ||
| 89 | MODULE_DEVICE_TABLE(i2c, tps53679_id); | |
| 90 | ||
| e91cb17b | 91 | static const struct of_device_id __maybe_unused tps53679_of_match[] = { |
| 61052652 VP |
92 | {.compatible = "ti,tps53679"}, |
| 93 | {} | |
| 94 | }; | |
| 95 | MODULE_DEVICE_TABLE(of, tps53679_of_match); | |
| 96 | ||
| 97 | static struct i2c_driver tps53679_driver = { | |
| 98 | .driver = { | |
| 99 | .name = "tps53679", | |
| 100 | .of_match_table = of_match_ptr(tps53679_of_match), | |
| 101 | }, | |
| 102 | .probe = tps53679_probe, | |
| 103 | .remove = pmbus_do_remove, | |
| 104 | .id_table = tps53679_id, | |
| 105 | }; | |
| 106 | ||
| 107 | module_i2c_driver(tps53679_driver); | |
| 108 | ||
| 109 | MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>"); | |
| 110 | MODULE_DESCRIPTION("PMBus driver for Texas Instruments TPS53679"); | |
| 111 | MODULE_LICENSE("GPL"); |