projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f20b4a93 CH |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* | |
| 3 | * Driver for MPS MPQ8785 Step-Down Converter | |
| 4 | */ | |
| 5 | ||
| 6 | #include <linux/i2c.h> | |
| 7 | #include <linux/module.h> | |
| 8 | #include <linux/of_device.h> | |
| 9 | #include "pmbus.h" | |
| 10 | ||
| 11 | static int mpq8785_identify(struct i2c_client *client, | |
| 12 | struct pmbus_driver_info *info) | |
| 13 | { | |
| 14 | int vout_mode; | |
| 15 | ||
| 16 | vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); | |
| 17 | if (vout_mode < 0 || vout_mode == 0xff) | |
| 18 | return vout_mode < 0 ? vout_mode : -ENODEV; | |
| 19 | switch (vout_mode >> 5) { | |
| 20 | case 0: | |
| 21 | info->format[PSC_VOLTAGE_OUT] = linear; | |
| 22 | break; | |
| 23 | case 1: | |
| 24 | case 2: | |
| 25 | info->format[PSC_VOLTAGE_OUT] = direct, | |
| 26 | info->m[PSC_VOLTAGE_OUT] = 64; | |
| 27 | info->b[PSC_VOLTAGE_OUT] = 0; | |
| 28 | info->R[PSC_VOLTAGE_OUT] = 1; | |
| 29 | break; | |
| 30 | default: | |
| 31 | return -ENODEV; | |
| 32 | } | |
| 33 | ||
| 34 | return 0; | |
| 35 | }; | |
| 36 | ||
| 37 | static struct pmbus_driver_info mpq8785_info = { | |
| 38 | .pages = 1, | |
| 39 | .format[PSC_VOLTAGE_IN] = direct, | |
| 40 | .format[PSC_CURRENT_OUT] = direct, | |
| 41 | .format[PSC_TEMPERATURE] = direct, | |
| 42 | .m[PSC_VOLTAGE_IN] = 4, | |
| 43 | .b[PSC_VOLTAGE_IN] = 0, | |
| 44 | .R[PSC_VOLTAGE_IN] = 1, | |
| 45 | .m[PSC_CURRENT_OUT] = 16, | |
| 46 | .b[PSC_CURRENT_OUT] = 0, | |
| 47 | .R[PSC_CURRENT_OUT] = 0, | |
| 48 | .m[PSC_TEMPERATURE] = 1, | |
| 49 | .b[PSC_TEMPERATURE] = 0, | |
| 50 | .R[PSC_TEMPERATURE] = 0, | |
| 51 | .func[0] = | |
| 52 | PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT | | |
| 53 | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | | |
| 54 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | | |
| 55 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, | |
| 56 | .identify = mpq8785_identify, | |
| 57 | }; | |
| 58 | ||
| 59 | static int mpq8785_probe(struct i2c_client *client) | |
| 60 | { | |
| 61 | return pmbus_do_probe(client, &mpq8785_info); | |
| 62 | }; | |
| 63 | ||
| 64 | static const struct i2c_device_id mpq8785_id[] = { | |
| d8a66f36 | 65 | { "mpq8785" }, |
| f20b4a93 CH |
66 | { }, |
| 67 | }; | |
| 68 | MODULE_DEVICE_TABLE(i2c, mpq8785_id); | |
| 69 | ||
| 70 | static const struct of_device_id __maybe_unused mpq8785_of_match[] = { | |
| 71 | { .compatible = "mps,mpq8785" }, | |
| 72 | {} | |
| 73 | }; | |
| 74 | MODULE_DEVICE_TABLE(of, mpq8785_of_match); | |
| 75 | ||
| 76 | static struct i2c_driver mpq8785_driver = { | |
| 77 | .driver = { | |
| 78 | .name = "mpq8785", | |
| 79 | .of_match_table = of_match_ptr(mpq8785_of_match), | |
| 80 | }, | |
| 81 | .probe = mpq8785_probe, | |
| 82 | .id_table = mpq8785_id, | |
| 83 | }; | |
| 84 | ||
| 85 | module_i2c_driver(mpq8785_driver); | |
| 86 | ||
| 87 | MODULE_AUTHOR("Charles Hsu <ythsu0511@gmail.com>"); | |
| 88 | MODULE_DESCRIPTION("PMBus driver for MPS MPQ8785"); | |
| 89 | MODULE_LICENSE("GPL"); | |
| 90 | MODULE_IMPORT_NS(PMBUS); |