drivers/hwmon/pmbus/pm6764tr.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
   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 #define PM6764TR_PMBUS_READ_VOUT        0xD4
  15
  16 static int pm6764tr_read_word_data(struct i2c_client *client, int page, int phase, int reg)
  17 {
  18         int ret;
  19
  20         switch (reg) {
  21         case PMBUS_VIRT_READ_VMON:
  22                 ret = pmbus_read_word_data(client, page, phase, PM6764TR_PMBUS_READ_VOUT);
  23                 break;
  24         default:
  25                 ret = -ENODATA;
  26                 break;
  27         }
  28         return ret;
  29 }
  30
  31 static struct pmbus_driver_info pm6764tr_info = {
  32         .pages = 1,
  33         .format[PSC_VOLTAGE_IN] = linear,
  34         .format[PSC_VOLTAGE_OUT] = vid,
  35         .format[PSC_TEMPERATURE] = linear,
  36         .format[PSC_CURRENT_OUT] = linear,
  37         .format[PSC_POWER] = linear,
  38         .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
  39             PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
  40                 PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
  41                 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
  42         .read_word_data = pm6764tr_read_word_data,
  43 };
  44
  45 static int pm6764tr_probe(struct i2c_client *client)
  46 {
  47         return pmbus_do_probe(client, &pm6764tr_info);
  48 }
  49
  50 static const struct i2c_device_id pm6764tr_id[] = {
  51         {"pm6764tr"},
  52         {}
  53 };
  54 MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
  55
  56 static const struct of_device_id __maybe_unused pm6764tr_of_match[] = {
  57         {.compatible = "st,pm6764tr"},
  58         {}
  59 };
  60
  61 /* This is the driver that will be inserted */
  62 static struct i2c_driver pm6764tr_driver = {
  63         .driver = {
  64                    .name = "pm6764tr",
  65                    .of_match_table = of_match_ptr(pm6764tr_of_match),
  66                    },
  67         .probe = pm6764tr_probe,
  68         .id_table = pm6764tr_id,
  69 };
  70
  71 module_i2c_driver(pm6764tr_driver);
  72
  73 MODULE_AUTHOR("Charles Hsu");
  74 MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
  75 MODULE_LICENSE("GPL");
  76 MODULE_IMPORT_NS("PMBUS");