336 строки
8.3 KiB
C
336 строки
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Hardware monitoring driver for Renesas Digital Multiphase Voltage Regulators
|
|
*
|
|
* Copyright (c) 2017 Google Inc
|
|
* Copyright (c) 2020 Renesas Electronics America
|
|
*
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sysfs.h>
|
|
|
|
#include "pmbus.h"
|
|
|
|
#define ISL68137_VOUT_AVS 0x30
|
|
#define RAA_DMPVR2_READ_VMON 0xc8
|
|
|
|
enum chips {
|
|
isl68137,
|
|
isl68220,
|
|
isl68221,
|
|
isl68222,
|
|
isl68223,
|
|
isl68224,
|
|
isl68225,
|
|
isl68226,
|
|
isl68227,
|
|
isl68229,
|
|
isl68233,
|
|
isl68239,
|
|
isl69222,
|
|
isl69223,
|
|
isl69224,
|
|
isl69225,
|
|
isl69227,
|
|
isl69228,
|
|
isl69234,
|
|
isl69236,
|
|
isl69239,
|
|
isl69242,
|
|
isl69243,
|
|
isl69247,
|
|
isl69248,
|
|
isl69254,
|
|
isl69255,
|
|
isl69256,
|
|
isl69259,
|
|
isl69260,
|
|
isl69268,
|
|
isl69269,
|
|
isl69298,
|
|
raa228000,
|
|
raa228004,
|
|
raa228006,
|
|
raa228228,
|
|
raa229001,
|
|
raa229004,
|
|
};
|
|
|
|
enum variants {
|
|
raa_dmpvr1_2rail,
|
|
raa_dmpvr2_1rail,
|
|
raa_dmpvr2_2rail,
|
|
raa_dmpvr2_2rail_nontc,
|
|
raa_dmpvr2_3rail,
|
|
raa_dmpvr2_hv,
|
|
};
|
|
|
|
static const struct i2c_device_id raa_dmpvr_id[];
|
|
|
|
static ssize_t isl68137_avs_enable_show_page(struct i2c_client *client,
|
|
int page,
|
|
char *buf)
|
|
{
|
|
int val = pmbus_read_byte_data(client, page, PMBUS_OPERATION);
|
|
|
|
return sprintf(buf, "%d\n",
|
|
(val & ISL68137_VOUT_AVS) == ISL68137_VOUT_AVS ? 1 : 0);
|
|
}
|
|
|
|
static ssize_t isl68137_avs_enable_store_page(struct i2c_client *client,
|
|
int page,
|
|
const char *buf, size_t count)
|
|
{
|
|
int rc, op_val;
|
|
bool result;
|
|
|
|
rc = kstrtobool(buf, &result);
|
|
if (rc)
|
|
return rc;
|
|
|
|
op_val = result ? ISL68137_VOUT_AVS : 0;
|
|
|
|
/*
|
|
* Writes to VOUT setpoint over AVSBus will persist after the VRM is
|
|
* switched to PMBus control. Switching back to AVSBus control
|
|
* restores this persisted setpoint rather than re-initializing to
|
|
* PMBus VOUT_COMMAND. Writing VOUT_COMMAND first over PMBus before
|
|
* enabling AVS control is the workaround.
|
|
*/
|
|
if (op_val == ISL68137_VOUT_AVS) {
|
|
rc = pmbus_read_word_data(client, page, 0xff,
|
|
PMBUS_VOUT_COMMAND);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc = pmbus_write_word_data(client, page, PMBUS_VOUT_COMMAND,
|
|
rc);
|
|
if (rc < 0)
|
|
return rc;
|
|
}
|
|
|
|
rc = pmbus_update_byte_data(client, page, PMBUS_OPERATION,
|
|
ISL68137_VOUT_AVS, op_val);
|
|
|
|
return (rc < 0) ? rc : count;
|
|
}
|
|
|
|
static ssize_t isl68137_avs_enable_show(struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
|
|
return isl68137_avs_enable_show_page(client, attr->index, buf);
|
|
}
|
|
|
|
static ssize_t isl68137_avs_enable_store(struct device *dev,
|
|
struct device_attribute *devattr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev->parent);
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
|
|
return isl68137_avs_enable_store_page(client, attr->index, buf, count);
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR_RW(avs0_enable, isl68137_avs_enable, 0);
|
|
static SENSOR_DEVICE_ATTR_RW(avs1_enable, isl68137_avs_enable, 1);
|
|
|
|
static struct attribute *enable_attrs[] = {
|
|
&sensor_dev_attr_avs0_enable.dev_attr.attr,
|
|
&sensor_dev_attr_avs1_enable.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group enable_group = {
|
|
.attrs = enable_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *isl68137_attribute_groups[] = {
|
|
&enable_group,
|
|
NULL,
|
|
};
|
|
|
|
static int raa_dmpvr2_read_word_data(struct i2c_client *client, int page,
|
|
int phase, int reg)
|
|
{
|
|
int ret;
|
|
|
|
switch (reg) {
|
|
case PMBUS_VIRT_READ_VMON:
|
|
ret = pmbus_read_word_data(client, page, phase,
|
|
RAA_DMPVR2_READ_VMON);
|
|
break;
|
|
default:
|
|
ret = -ENODATA;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct pmbus_driver_info raa_dmpvr_info = {
|
|
.pages = 3,
|
|
.format[PSC_VOLTAGE_IN] = direct,
|
|
.format[PSC_VOLTAGE_OUT] = direct,
|
|
.format[PSC_CURRENT_IN] = direct,
|
|
.format[PSC_CURRENT_OUT] = direct,
|
|
.format[PSC_POWER] = direct,
|
|
.format[PSC_TEMPERATURE] = direct,
|
|
.m[PSC_VOLTAGE_IN] = 1,
|
|
.b[PSC_VOLTAGE_IN] = 0,
|
|
.R[PSC_VOLTAGE_IN] = 2,
|
|
.m[PSC_VOLTAGE_OUT] = 1,
|
|
.b[PSC_VOLTAGE_OUT] = 0,
|
|
.R[PSC_VOLTAGE_OUT] = 3,
|
|
.m[PSC_CURRENT_IN] = 1,
|
|
.b[PSC_CURRENT_IN] = 0,
|
|
.R[PSC_CURRENT_IN] = 2,
|
|
.m[PSC_CURRENT_OUT] = 1,
|
|
.b[PSC_CURRENT_OUT] = 0,
|
|
.R[PSC_CURRENT_OUT] = 1,
|
|
.m[PSC_POWER] = 1,
|
|
.b[PSC_POWER] = 0,
|
|
.R[PSC_POWER] = 0,
|
|
.m[PSC_TEMPERATURE] = 1,
|
|
.b[PSC_TEMPERATURE] = 0,
|
|
.R[PSC_TEMPERATURE] = 0,
|
|
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN
|
|
| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2
|
|
| PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP
|
|
| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT
|
|
| PMBUS_HAVE_VMON,
|
|
.func[1] = PMBUS_HAVE_IIN | PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT
|
|
| PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP
|
|
| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_IOUT
|
|
| PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
|
|
.func[2] = PMBUS_HAVE_IIN | PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT
|
|
| PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP
|
|
| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_IOUT
|
|
| PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
|
|
};
|
|
|
|
static int isl68137_probe(struct i2c_client *client)
|
|
{
|
|
struct pmbus_driver_info *info;
|
|
|
|
info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
memcpy(info, &raa_dmpvr_info, sizeof(*info));
|
|
|
|
switch (i2c_match_id(raa_dmpvr_id, client)->driver_data) {
|
|
case raa_dmpvr1_2rail:
|
|
info->pages = 2;
|
|
info->R[PSC_VOLTAGE_IN] = 3;
|
|
info->func[0] &= ~PMBUS_HAVE_VMON;
|
|
info->func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
|
|
| PMBUS_HAVE_POUT;
|
|
info->groups = isl68137_attribute_groups;
|
|
break;
|
|
case raa_dmpvr2_1rail:
|
|
info->pages = 1;
|
|
info->read_word_data = raa_dmpvr2_read_word_data;
|
|
break;
|
|
case raa_dmpvr2_2rail_nontc:
|
|
info->func[0] &= ~PMBUS_HAVE_TEMP3;
|
|
info->func[1] &= ~PMBUS_HAVE_TEMP3;
|
|
fallthrough;
|
|
case raa_dmpvr2_2rail:
|
|
info->pages = 2;
|
|
info->read_word_data = raa_dmpvr2_read_word_data;
|
|
break;
|
|
case raa_dmpvr2_3rail:
|
|
info->read_word_data = raa_dmpvr2_read_word_data;
|
|
break;
|
|
case raa_dmpvr2_hv:
|
|
info->pages = 1;
|
|
info->R[PSC_VOLTAGE_IN] = 1;
|
|
info->m[PSC_VOLTAGE_OUT] = 2;
|
|
info->R[PSC_VOLTAGE_OUT] = 2;
|
|
info->m[PSC_CURRENT_IN] = 2;
|
|
info->m[PSC_POWER] = 2;
|
|
info->R[PSC_POWER] = -1;
|
|
info->read_word_data = raa_dmpvr2_read_word_data;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
return pmbus_do_probe(client, info);
|
|
}
|
|
|
|
static const struct i2c_device_id raa_dmpvr_id[] = {
|
|
{"isl68137", raa_dmpvr1_2rail},
|
|
{"isl68220", raa_dmpvr2_2rail},
|
|
{"isl68221", raa_dmpvr2_3rail},
|
|
{"isl68222", raa_dmpvr2_2rail},
|
|
{"isl68223", raa_dmpvr2_2rail},
|
|
{"isl68224", raa_dmpvr2_3rail},
|
|
{"isl68225", raa_dmpvr2_2rail},
|
|
{"isl68226", raa_dmpvr2_3rail},
|
|
{"isl68227", raa_dmpvr2_1rail},
|
|
{"isl68229", raa_dmpvr2_3rail},
|
|
{"isl68233", raa_dmpvr2_2rail},
|
|
{"isl68239", raa_dmpvr2_3rail},
|
|
|
|
{"isl69222", raa_dmpvr2_2rail},
|
|
{"isl69223", raa_dmpvr2_3rail},
|
|
{"isl69224", raa_dmpvr2_2rail},
|
|
{"isl69225", raa_dmpvr2_2rail},
|
|
{"isl69227", raa_dmpvr2_3rail},
|
|
{"isl69228", raa_dmpvr2_3rail},
|
|
{"isl69234", raa_dmpvr2_2rail},
|
|
{"isl69236", raa_dmpvr2_2rail},
|
|
{"isl69239", raa_dmpvr2_3rail},
|
|
{"isl69242", raa_dmpvr2_2rail},
|
|
{"isl69243", raa_dmpvr2_1rail},
|
|
{"isl69247", raa_dmpvr2_2rail},
|
|
{"isl69248", raa_dmpvr2_2rail},
|
|
{"isl69254", raa_dmpvr2_2rail},
|
|
{"isl69255", raa_dmpvr2_2rail},
|
|
{"isl69256", raa_dmpvr2_2rail},
|
|
{"isl69259", raa_dmpvr2_2rail},
|
|
{"isl69260", raa_dmpvr2_2rail},
|
|
{"isl69268", raa_dmpvr2_2rail},
|
|
{"isl69269", raa_dmpvr2_3rail},
|
|
{"isl69298", raa_dmpvr2_2rail},
|
|
|
|
{"raa228000", raa_dmpvr2_hv},
|
|
{"raa228004", raa_dmpvr2_hv},
|
|
{"raa228006", raa_dmpvr2_hv},
|
|
{"raa228228", raa_dmpvr2_2rail_nontc},
|
|
{"raa229001", raa_dmpvr2_2rail},
|
|
{"raa229004", raa_dmpvr2_2rail},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, raa_dmpvr_id);
|
|
|
|
/* This is the driver that will be inserted */
|
|
static struct i2c_driver isl68137_driver = {
|
|
.driver = {
|
|
.name = "isl68137",
|
|
},
|
|
.probe_new = isl68137_probe,
|
|
.id_table = raa_dmpvr_id,
|
|
};
|
|
|
|
module_i2c_driver(isl68137_driver);
|
|
|
|
MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
|
|
MODULE_DESCRIPTION("PMBus driver for Renesas digital multiphase voltage regulators");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_IMPORT_NS(PMBUS);
|