drivers/hwmon/pmbus/tps546d24.c

   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"},
  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");