| 1 | // SPDX-License-Identifier: GPL-2.0+ |
|---|---|
| 2 | /* |
| 3 | * Hardware monitoring driver for TEXAS TPS546D24 buck converter |
| 4 | */ |
| 5 | |
| 6 | #include <linux/err.h> |
| 7 | #include <linux/i2c.h> |
| 8 | #include <linux/init.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/pmbus.h> |
| 12 | #include "pmbus.h" |
| 13 | |
| 14 | static struct pmbus_driver_info tps546d24_info = { |
| 15 | .pages = 1, |
| 16 | .format[PSC_VOLTAGE_IN] = linear, |
| 17 | .format[PSC_VOLTAGE_OUT] = linear, |
| 18 | .format[PSC_TEMPERATURE] = linear, |
| 19 | .format[PSC_CURRENT_OUT] = linear, |
| 20 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
| 21 | | PMBUS_HAVE_IOUT | PMBUS_HAVE_VOUT |
| 22 | | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
| 23 | | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| 24 | }; |
| 25 | |
| 26 | static int tps546d24_probe(struct i2c_client *client) |
| 27 | { |
| 28 | int reg; |
| 29 | |
| 30 | reg = i2c_smbus_read_byte_data(client, command: PMBUS_VOUT_MODE); |
| 31 | if (reg < 0) |
| 32 | return reg; |
| 33 | |
| 34 | if (reg & 0x80) { |
| 35 | int err; |
| 36 | |
| 37 | err = i2c_smbus_write_byte_data(client, command: PMBUS_VOUT_MODE, value: reg & 0x7f); |
| 38 | if (err < 0) |
| 39 | return err; |
| 40 | } |
| 41 | return pmbus_do_probe(client, info: &tps546d24_info); |
| 42 | } |
| 43 | |
| 44 | static const struct i2c_device_id tps546d24_id[] = { |
| 45 | {"tps546d24", 0}, |
| 46 | {} |
| 47 | }; |
| 48 | MODULE_DEVICE_TABLE(i2c, tps546d24_id); |
| 49 | |
| 50 | static const struct of_device_id __maybe_unused tps546d24_of_match[] = { |
| 51 | {.compatible = "ti,tps546d24"}, |
| 52 | {} |
| 53 | }; |
| 54 | MODULE_DEVICE_TABLE(of, tps546d24_of_match); |
| 55 | |
| 56 | /* This is the driver that will be inserted */ |
| 57 | static struct i2c_driver tps546d24_driver = { |
| 58 | .driver = { |
| 59 | .name = "tps546d24", |
| 60 | .of_match_table = of_match_ptr(tps546d24_of_match), |
| 61 | }, |
| 62 | .probe = tps546d24_probe, |
| 63 | .id_table = tps546d24_id, |
| 64 | }; |
| 65 | |
| 66 | module_i2c_driver(tps546d24_driver); |
| 67 | |
| 68 | MODULE_AUTHOR("Duke Du <dukedu83@gmail.com>"); |
| 69 | MODULE_DESCRIPTION("PMBus driver for TI tps546d24"); |
| 70 | MODULE_LICENSE("GPL"); |
| 71 | MODULE_IMPORT_NS(PMBUS); |
| 72 |