cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pm6764tr.c (1880B)

      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
     16static 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
     31static 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
     45static int pm6764tr_probe(struct i2c_client *client)
     46{
     47	return pmbus_do_probe(client, &pm6764tr_info);
     48}
     49
     50static const struct i2c_device_id pm6764tr_id[] = {
     51	{"pm6764tr", 0},
     52	{}
     53};
     54MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
     55
     56static 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 */
     62static struct i2c_driver pm6764tr_driver = {
     63	.driver = {
     64		   .name = "pm6764tr",
     65		   .of_match_table = of_match_ptr(pm6764tr_of_match),
     66		   },
     67	.probe_new = pm6764tr_probe,
     68	.id_table = pm6764tr_id,
     69};
     70
     71module_i2c_driver(pm6764tr_driver);
     72
     73MODULE_AUTHOR("Charles Hsu");
     74MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
     75MODULE_LICENSE("GPL");
     76MODULE_IMPORT_NS(PMBUS);