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hwmon: (pmbus/lm25066) Add support for LM25056 

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2013-02-09 15:15:52 -08:00
parent e53e6497fc
commit 58615a94f6
3 changed files with 139 additions and 13 deletions
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18
Documentation/hwmon/lm25066
View File

@ -1,7 +1,13 @@
Kernel driver max8688
Kernel driver lm25066
=====================
Supported chips:
* TI LM25056
Prefix: 'lm25056'
Addresses scanned: -
Datasheets:
http://www.ti.com/lit/gpn/lm25056
http://www.ti.com/lit/gpn/lm25056a
* National Semiconductor LM25066
Prefix: 'lm25066'
Addresses scanned: -
@ -25,8 +31,9 @@ Author: Guenter Roeck <linux@roeck-us.net>
Description
-----------
This driver supports hardware montoring for National Semiconductor LM25066,
LM5064, and LM5064 Power Management, Monitoring, Control, and Protection ICs.
This driver supports hardware montoring for National Semiconductor / TI LM25056,
LM25066, LM5064, and LM5064 Power Management, Monitoring, Control, and
Protection ICs.
The driver is a client driver to the core PMBus driver. Please see
Documentation/hwmon/pmbus for details on PMBus client drivers.
@ -62,8 +69,13 @@ in1_max_alarm Input voltage high alarm.
in2_label "vmon"
in2_input Measured voltage on VAUX pin
in2_min Minimum VAUX voltage (LM25056 only).
in2_max Maximum VAUX voltage (LM25056 only).
in2_min_alarm VAUX voltage low alarm (LM25056 only).
in2_max_alarm VAUX voltage high alarm (LM25056 only).
in3_label "vout1"
Not supported on LM25056.
in3_input Measured output voltage.
in3_average Average measured output voltage.
in3_min Minimum output voltage.

2
drivers/hwmon/pmbus/Kconfig
View File

@ -42,7 +42,7 @@ config SENSORS_LM25066
default n
help
If you say yes here you get hardware monitoring support for National
Semiconductor LM25066, LM5064, and LM5066.
Semiconductor LM25056, LM25066, LM5064, and LM5066.
This driver can also be built as a module. If so, the module will
be called lm25066.

132
drivers/hwmon/pmbus/lm25066.c
View File

@ -1,5 +1,5 @@
/*
* Hardware monitoring driver for LM25066 / LM5064 / LM5066
* Hardware monitoring driver for LM25056 / LM25066 / LM5064 / LM5066
*
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2013 Guenter Roeck
@ -27,7 +27,7 @@
#include <linux/i2c.h>
#include "pmbus.h"
enum chips { lm25066, lm5064, lm5066 };
enum chips { lm25056, lm25066, lm5064, lm5066 };
#define LM25066_READ_VAUX 0xd0
#define LM25066_MFR_READ_IIN 0xd1
@ -44,6 +44,14 @@ enum chips { lm25066, lm5064, lm5066 };
#define LM25066_DEV_SETUP_CL (1 << 4) /* Current limit */
/* LM25056 only */
#define LM25056_VAUX_OV_WARN_LIMIT 0xe3
#define LM25056_VAUX_UV_WARN_LIMIT 0xe4
#define LM25056_MFR_STS_VAUX_OV_WARN (1 << 1)
#define LM25056_MFR_STS_VAUX_UV_WARN (1 << 0)
struct __coeff {
short m, b, R;
};
@ -51,7 +59,34 @@ struct __coeff {
#define PSC_CURRENT_IN_L (PSC_NUM_CLASSES)
#define PSC_POWER_L (PSC_NUM_CLASSES + 1)
static struct __coeff lm25066_coeff[3][PSC_NUM_CLASSES + 2] = {
static struct __coeff lm25066_coeff[4][PSC_NUM_CLASSES + 2] = {
[lm25056] = {
[PSC_VOLTAGE_IN] = {
.m = 16296,
.R = -2,
},
[PSC_CURRENT_IN] = {
.m = 13797,
.R = -2,
},
[PSC_CURRENT_IN_L] = {
.m = 6726,
.R = -2,
},
[PSC_POWER] = {
.m = 5501,
.R = -3,
},
[PSC_POWER_L] = {
.m = 26882,
.R = -4,
},
[PSC_TEMPERATURE] = {
.m = 1580,
.b = -14500,
.R = -2,
},
},
[lm25066] = {
[PSC_VOLTAGE_IN] = {
.m = 22070,
@ -161,6 +196,10 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
break;
/* Adjust returned value to match VIN coefficients */
switch (data->id) {
case lm25056:
/* VIN: 6.14 mV VAUX: 293 uV LSB */
ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
break;
case lm25066:
/* VIN: 4.54 mV VAUX: 283.2 uV LSB */
ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
@ -214,6 +253,58 @@ static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
return ret;
}
static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
{
int ret;
switch (reg) {
case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
ret = pmbus_read_word_data(client, 0,
LM25056_VAUX_UV_WARN_LIMIT);
if (ret < 0)
break;
/* Adjust returned value to match VIN coefficients */
ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
break;
case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
ret = pmbus_read_word_data(client, 0,
LM25056_VAUX_OV_WARN_LIMIT);
if (ret < 0)
break;
/* Adjust returned value to match VIN coefficients */
ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
break;
default:
ret = lm25066_read_word_data(client, page, reg);
break;
}
return ret;
}
static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg)
{
int ret, s;
switch (reg) {
case PMBUS_VIRT_STATUS_VMON:
ret = pmbus_read_byte_data(client, 0,
PMBUS_STATUS_MFR_SPECIFIC);
if (ret < 0)
break;
s = 0;
if (ret & LM25056_MFR_STS_VAUX_UV_WARN)
s |= PB_VOLTAGE_UV_WARNING;
if (ret & LM25056_MFR_STS_VAUX_OV_WARN)
s |= PB_VOLTAGE_OV_WARNING;
ret = s;
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
u16 word)
{
@ -243,6 +334,22 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
word);
pmbus_clear_cache(client);
break;
case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
/* Adjust from VIN coefficients (for LM25056) */
word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
ret = pmbus_write_word_data(client, 0,
LM25056_VAUX_UV_WARN_LIMIT, word);
pmbus_clear_cache(client);
break;
case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
/* Adjust from VIN coefficients (for LM25056) */
word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
word = ((s16)word < 0) ? 0 : clamp_val(word, 0, 0x0fff);
ret = pmbus_write_word_data(client, 0,
LM25056_VAUX_OV_WARN_LIMIT, word);
pmbus_clear_cache(client);
break;
case PMBUS_VIRT_RESET_PIN_HISTORY:
ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
break;
@ -284,12 +391,18 @@ static int lm25066_probe(struct i2c_client *client,
info->format[PSC_TEMPERATURE] = direct;
info->format[PSC_POWER] = direct;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON
| PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON | PMBUS_HAVE_VOUT
| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN
| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
info->read_word_data = lm25066_read_word_data;
if (data->id == lm25056) {
info->func[0] |= PMBUS_HAVE_STATUS_VMON;
info->read_word_data = lm25056_read_word_data;
info->read_byte_data = lm25056_read_byte_data;
} else {
info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
info->read_word_data = lm25066_read_word_data;
}
info->write_word_data = lm25066_write_word_data;
coeff = &lm25066_coeff[data->id][0];
@ -318,6 +431,7 @@ static int lm25066_probe(struct i2c_client *client,
}
static const struct i2c_device_id lm25066_id[] = {
{"lm25056", lm25056},
{"lm25066", lm25066},
{"lm5064", lm5064},
{"lm5066", lm5066},
@ -339,5 +453,5 @@ static struct i2c_driver lm25066_driver = {
module_i2c_driver(lm25066_driver);
MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");
MODULE_DESCRIPTION("PMBus driver for LM25056/LM25066/LM5064/LM5066");
MODULE_LICENSE("GPL");