hwmon/pmbus/pm6764tr.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
0004  */
0005
0006 #include <linux/err.h>
0007 #include <linux/i2c.h>
0008 #include <linux/init.h>
0009 #include <linux/kernel.h>
0010 #include <linux/module.h>
0011 #include <linux/pmbus.h>
0012 #include "pmbus.h"
0013
0014 #define PM6764TR_PMBUS_READ_VOUT    0xD4
0015
0016 static int pm6764tr_read_word_data(struct i2c_client *client, int page, int phase, int reg)
0017 {
0018     int ret;
0019
0020     switch (reg) {
0021     case PMBUS_VIRT_READ_VMON:
0022         ret = pmbus_read_word_data(client, page, phase, PM6764TR_PMBUS_READ_VOUT);
0023         break;
0024     default:
0025         ret = -ENODATA;
0026         break;
0027     }
0028     return ret;
0029 }
0030
0031 static struct pmbus_driver_info pm6764tr_info = {
0032     .pages = 1,
0033     .format[PSC_VOLTAGE_IN] = linear,
0034     .format[PSC_VOLTAGE_OUT] = vid,
0035     .format[PSC_TEMPERATURE] = linear,
0036     .format[PSC_CURRENT_OUT] = linear,
0037     .format[PSC_POWER] = linear,
0038     .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
0039         PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
0040         PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
0041         PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
0042     .read_word_data = pm6764tr_read_word_data,
0043 };
0044
0045 static int pm6764tr_probe(struct i2c_client *client)
0046 {
0047     return pmbus_do_probe(client, &pm6764tr_info);
0048 }
0049
0050 static const struct i2c_device_id pm6764tr_id[] = {
0051     {"pm6764tr", 0},
0052     {}
0053 };
0054 MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
0055
0056 static const struct of_device_id __maybe_unused pm6764tr_of_match[] = {
0057     {.compatible = "st,pm6764tr"},
0058     {}
0059 };
0060
0061 /* This is the driver that will be inserted */
0062 static struct i2c_driver pm6764tr_driver = {
0063     .driver = {
0064            .name = "pm6764tr",
0065            .of_match_table = of_match_ptr(pm6764tr_of_match),
0066            },
0067     .probe_new = pm6764tr_probe,
0068     .id_table = pm6764tr_id,
0069 };
0070
0071 module_i2c_driver(pm6764tr_driver);
0072
0073 MODULE_AUTHOR("Charles Hsu");
0074 MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
0075 MODULE_LICENSE("GPL");
0076 MODULE_IMPORT_NS(PMBUS);