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hwmon: (pmbus) Add support for Maxim MAX8688 

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
wifi-calibration
Guenter Roeck 2011-01-26 20:11:04 -08:00
parent 44f5a408ba
commit 8ea3238ba1
3 changed files with 169 additions and 0 deletions
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10
drivers/hwmon/Kconfig
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@ -779,6 +779,16 @@ config SENSORS_PMBUS
This driver can also be built as a module. If so, the module will
be called pmbus.
config SENSORS_MAX8688
tristate "Maxim MAX8688"
default n
help
If you say yes here you get hardware monitoring support for Maxim
MAX8688.
This driver can also be built as a module. If so, the module will
be called max8688.
endif # PMBUS
config SENSORS_SHT15

1
drivers/hwmon/Makefile
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@ -117,6 +117,7 @@ obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o
# PMBus drivers
obj-$(CONFIG_PMBUS) += pmbus_core.o
obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y)
EXTRA_CFLAGS += -DDEBUG

158
drivers/hwmon/max8688.c 100644
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@ -0,0 +1,158 @@
/*
* Hardware monitoring driver for Maxim MAX8688
*
* Copyright (c) 2011 Ericsson AB.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include "pmbus.h"
#define MAX8688_MFG_STATUS 0xd8
#define MAX8688_STATUS_OC_FAULT (1 << 4)
#define MAX8688_STATUS_OV_FAULT (1 << 5)
#define MAX8688_STATUS_OV_WARNING (1 << 8)
#define MAX8688_STATUS_UV_FAULT (1 << 9)
#define MAX8688_STATUS_UV_WARNING (1 << 10)
#define MAX8688_STATUS_UC_FAULT (1 << 11)
#define MAX8688_STATUS_OC_WARNING (1 << 12)
#define MAX8688_STATUS_OT_FAULT (1 << 13)
#define MAX8688_STATUS_OT_WARNING (1 << 14)
static int max8688_get_status(struct i2c_client *client, int page, int reg)
{
int ret = 0;
int mfg_status;
if (page)
return -EINVAL;
switch (reg) {
case PMBUS_STATUS_VOUT:
mfg_status = pmbus_read_word_data(client, 0,
MAX8688_MFG_STATUS);
if (mfg_status < 0)
return mfg_status;
if (mfg_status & MAX8688_STATUS_UV_WARNING)
ret |= PB_VOLTAGE_UV_WARNING;
if (mfg_status & MAX8688_STATUS_UV_FAULT)
ret |= PB_VOLTAGE_UV_FAULT;
if (mfg_status & MAX8688_STATUS_OV_WARNING)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfg_status & MAX8688_STATUS_OV_FAULT)
ret |= PB_VOLTAGE_OV_FAULT;
break;
case PMBUS_STATUS_IOUT:
mfg_status = pmbus_read_word_data(client, 0,
MAX8688_MFG_STATUS);
if (mfg_status < 0)
return mfg_status;
if (mfg_status & MAX8688_STATUS_UC_FAULT)
ret |= PB_IOUT_UC_FAULT;
if (mfg_status & MAX8688_STATUS_OC_WARNING)
ret |= PB_IOUT_OC_WARNING;
if (mfg_status & MAX8688_STATUS_OC_FAULT)
ret |= PB_IOUT_OC_FAULT;
break;
case PMBUS_STATUS_TEMPERATURE:
mfg_status = pmbus_read_word_data(client, 0,
MAX8688_MFG_STATUS);
if (mfg_status < 0)
return mfg_status;
if (mfg_status & MAX8688_STATUS_OT_WARNING)
ret |= PB_TEMP_OT_WARNING;
if (mfg_status & MAX8688_STATUS_OT_FAULT)
ret |= PB_TEMP_OT_FAULT;
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static struct pmbus_driver_info max8688_info = {
.pages = 1,
.direct[PSC_VOLTAGE_IN] = true,
.direct[PSC_VOLTAGE_OUT] = true,
.direct[PSC_TEMPERATURE] = true,
.direct[PSC_CURRENT_OUT] = true,
.m[PSC_VOLTAGE_IN] = 19995,
.b[PSC_VOLTAGE_IN] = 0,
.R[PSC_VOLTAGE_IN] = -1,
.m[PSC_VOLTAGE_OUT] = 19995,
.b[PSC_VOLTAGE_OUT] = 0,
.R[PSC_VOLTAGE_OUT] = -1,
.m[PSC_CURRENT_OUT] = 23109,
.b[PSC_CURRENT_OUT] = 0,
.R[PSC_CURRENT_OUT] = -2,
.m[PSC_TEMPERATURE] = -7612,
.b[PSC_TEMPERATURE] = 335,
.R[PSC_TEMPERATURE] = -3,
.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_TEMP
| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
| PMBUS_HAVE_STATUS_TEMP,
.get_status = max8688_get_status,
};
static int max8688_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
return pmbus_do_probe(client, id, &max8688_info);
}
static int max8688_remove(struct i2c_client *client)
{
return pmbus_do_remove(client);
}
static const struct i2c_device_id max8688_id[] = {
{"max8688", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, max8688_id);
/* This is the driver that will be inserted */
static struct i2c_driver max8688_driver = {
.driver = {
.name = "max8688",
},
.probe = max8688_probe,
.remove = max8688_remove,
.id_table = max8688_id,
};
static int __init max8688_init(void)
{
return i2c_add_driver(&max8688_driver);
}
static void __exit max8688_exit(void)
{
i2c_del_driver(&max8688_driver);
}
MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for Maxim MAX8688");
MODULE_LICENSE("GPL");
module_init(max8688_init);
module_exit(max8688_exit);