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, 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, PMBUS_VOUT_MODE, reg & 0x7f); 38 if (err < 0) 39 return err; 40 } 41 return pmbus_do_probe(client, &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_new = 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