leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

hwmon: (pmbus/ltc2978): Add support for LTC2977

Browse Source 
LTC2977 is a pin compatible replacement for LTC2978.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2013-09-23 10:56:48 -07:00
parent c8ccab7ab5
commit c24c407e96
2 changed files with 36 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
Documentation/hwmon/ltc2978
View File

@ -6,6 +6,10 @@ Supported chips:
Prefix: 'ltc2974' Prefix: 'ltc2974'
Addresses scanned: - Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc2974 Datasheet: http://www.linear.com/product/ltc2974
* Linear Technology LTC2977
Prefix: 'ltc2977'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc2977
* Linear Technology LTC2978 * Linear Technology LTC2978
Prefix: 'ltc2978' Prefix: 'ltc2978'
Addresses scanned: - Addresses scanned: -
@ -26,8 +30,9 @@ Description
----------- -----------
LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
monitor. LTC3880 is a dual output poly-phase step-down DC/DC controller. LTC3883 monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
is a single phase step-down DC/DC controller. output poly-phase step-down DC/DC controller. LTC3883 is a single phase
step-down DC/DC controller.
Usage Notes Usage Notes
@ -49,21 +54,25 @@ Sysfs attributes
in1_label "vin" in1_label "vin"
in1_input Measured input voltage. in1_input Measured input voltage.
in1_min Minimum input voltage. in1_min Minimum input voltage.
in1_max Maximum input voltage. LTC2974 and LTC2978 only. in1_max Maximum input voltage.
in1_lcrit Critical minimum input voltage. LTC2974 and LTC2978 LTC2974, LTC2977, and LTC2978 only.
only. in1_lcrit Critical minimum input voltage.
LTC2974, LTC2977, and LTC2978 only.
in1_crit Critical maximum input voltage. in1_crit Critical maximum input voltage.
in1_min_alarm Input voltage low alarm. in1_min_alarm Input voltage low alarm.
in1_max_alarm Input voltage high alarm. LTC2974 and LTC2978 only. in1_max_alarm Input voltage high alarm.
in1_lcrit_alarm Input voltage critical low alarm. LTC2974 and LTC2978 LTC2974, LTC2977, and LTC2978 only.
only. in1_lcrit_alarm Input voltage critical low alarm.
LTC2974, LTC2977, and LTC2978 only.
in1_crit_alarm Input voltage critical high alarm. in1_crit_alarm Input voltage critical high alarm.
in1_lowest Lowest input voltage. LTC2974 and LTC2978 only. in1_lowest Lowest input voltage.
LTC2974, LTC2977, and LTC2978 only.
in1_highest Highest input voltage. in1_highest Highest input voltage.
in1_reset_history Reset input voltage history. in1_reset_history Reset input voltage history.
in[N]_label "vout[1-8]". in[N]_label "vout[1-8]".
LTC2974: N=2-5 LTC2974: N=2-5
LTC2977: N=2-9
LTC2978: N=2-9 LTC2978: N=2-9
LTC3880: N=2-3 LTC3880: N=2-3
LTC3883: N=2 LTC3883: N=2
@ -83,21 +92,23 @@ in[N]_reset_history Reset output voltage history.
temp[N]_input Measured temperature. temp[N]_input Measured temperature.
On LTC2974, temp[1-4] report external temperatures, On LTC2974, temp[1-4] report external temperatures,
and temp5 reports the chip temperature. and temp5 reports the chip temperature.
On LTC2978, only one temperature measurement is On LTC2977 and LTC2978, only one temperature measurement
supported and reports the chip temperature. is supported and reports the chip temperature.
On LTC3880, temp1 and temp2 report external On LTC3880, temp1 and temp2 report external
temperatures, and temp3 reports the chip temperature. temperatures, and temp3 reports the chip temperature.
On LTC3883, temp1 reports an external temperature, On LTC3883, temp1 reports an external temperature,
and temp2 reports the chip temperature. and temp2 reports the chip temperature.
temp[N]_min Mimimum temperature. LTC2974 and LTC2978 only. temp[N]_min Mimimum temperature. LTC2974, LCT2977, and LTC2978 only.
temp[N]_max Maximum temperature. temp[N]_max Maximum temperature.
temp[N]_lcrit Critical low temperature. temp[N]_lcrit Critical low temperature.
temp[N]_crit Critical high temperature. temp[N]_crit Critical high temperature.
temp[N]_min_alarm Temperature low alarm. LTC2974 and LTC2978 only. temp[N]_min_alarm Temperature low alarm.
LTC2974, LTC2977, and LTC2978 only.
temp[N]_max_alarm Temperature high alarm. temp[N]_max_alarm Temperature high alarm.
temp[N]_lcrit_alarm Temperature critical low alarm. temp[N]_lcrit_alarm Temperature critical low alarm.
temp[N]_crit_alarm Temperature critical high alarm. temp[N]_crit_alarm Temperature critical high alarm.
temp[N]_lowest Lowest measured temperature. LTC2974 and LTC2978 only. temp[N]_lowest Lowest measured temperature.
LTC2974, LTC2977, and LTC2978 only.
Not supported for chip temperature sensor on LTC2974. Not supported for chip temperature sensor on LTC2974.
temp[N]_highest Highest measured temperature. Not supported for chip temp[N]_highest Highest measured temperature. Not supported for chip
temperature sensor on LTC2974. temperature sensor on LTC2974.
@ -109,6 +120,7 @@ power1_input Measured input power.
power[N]_label "pout[1-4]". power[N]_label "pout[1-4]".
LTC2974: N=1-4 LTC2974: N=1-4
LTC2977: Not supported
LTC2978: Not supported LTC2978: Not supported
LTC3880: N=1-2 LTC3880: N=1-2
LTC3883: N=2 LTC3883: N=2
@ -123,6 +135,7 @@ curr1_reset_history Reset input current history. LTC3883 only.
curr[N]_label "iout[1-4]". curr[N]_label "iout[1-4]".
LTC2974: N=1-4 LTC2974: N=1-4
LTC2977: not supported
LTC2978: not supported LTC2978: not supported
LTC3880: N=2-3 LTC3880: N=2-3
LTC3883: N=2 LTC3883: N=2

12
drivers/hwmon/pmbus/ltc2978.c
View File

@ -1,5 +1,6 @@
/* /*
* Hardware monitoring driver for LTC2974, LTC2978, LTC3880, and LTC3883 * Hardware monitoring driver for LTC2974, LTC2977, LTC2978, LTC3880,
* and LTC3883
* *
* Copyright (c) 2011 Ericsson AB. * Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2013 Guenter Roeck * Copyright (c) 2013 Guenter Roeck
@ -27,7 +28,7 @@
#include <linux/i2c.h> #include <linux/i2c.h>
#include "pmbus.h" #include "pmbus.h"
enum chips { ltc2974, ltc2978, ltc3880, ltc3883 }; enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
/* Common for all chips */ /* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd #define LTC2978_MFR_VOUT_PEAK 0xdd
@ -35,7 +36,7 @@ enum chips { ltc2974, ltc2978, ltc3880, ltc3883 };
#define LTC2978_MFR_TEMPERATURE_PEAK 0xdf #define LTC2978_MFR_TEMPERATURE_PEAK 0xdf
#define LTC2978_MFR_SPECIAL_ID 0xe7 #define LTC2978_MFR_SPECIAL_ID 0xe7
/* LTC2974 and LTC2978 */ /* LTC2974, LCT2977, and LTC2978 */
#define LTC2978_MFR_VOUT_MIN 0xfb #define LTC2978_MFR_VOUT_MIN 0xfb
#define LTC2978_MFR_VIN_MIN 0xfc #define LTC2978_MFR_VIN_MIN 0xfc
#define LTC2978_MFR_TEMPERATURE_MIN 0xfd #define LTC2978_MFR_TEMPERATURE_MIN 0xfd
@ -53,6 +54,7 @@ enum chips { ltc2974, ltc2978, ltc3880, ltc3883 };
#define LTC3883_MFR_IIN_PEAK 0xe1 #define LTC3883_MFR_IIN_PEAK 0xe1
#define LTC2974_ID 0x0212 #define LTC2974_ID 0x0212
#define LTC2977_ID 0x0130
#define LTC2978_ID_REV1 0x0121 #define LTC2978_ID_REV1 0x0121
#define LTC2978_ID_REV2 0x0122 #define LTC2978_ID_REV2 0x0122
#define LTC3880_ID 0x4000 #define LTC3880_ID 0x4000
@ -363,6 +365,7 @@ static int ltc2978_write_word_data(struct i2c_client *client, int page,
static const struct i2c_device_id ltc2978_id[] = { static const struct i2c_device_id ltc2978_id[] = {
{"ltc2974", ltc2974}, {"ltc2974", ltc2974},
{"ltc2977", ltc2977},
{"ltc2978", ltc2978}, {"ltc2978", ltc2978},
{"ltc3880", ltc3880}, {"ltc3880", ltc3880},
{"ltc3883", ltc3883}, {"ltc3883", ltc3883},
@ -392,6 +395,8 @@ static int ltc2978_probe(struct i2c_client *client,
if (chip_id == LTC2974_ID) { if (chip_id == LTC2974_ID) {
data->id = ltc2974; data->id = ltc2974;
} else if (chip_id == LTC2977_ID) {
data->id = ltc2977;
} else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2) { } else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2) {
data->id = ltc2978; data->id = ltc2978;
} else if ((chip_id & LTC3880_ID_MASK) == LTC3880_ID) { } else if ((chip_id & LTC3880_ID_MASK) == LTC3880_ID) {
@ -438,6 +443,7 @@ static int ltc2978_probe(struct i2c_client *client,
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
} }
break; break;
case ltc2977:
case ltc2978: case ltc2978:
info->read_word_data = ltc2978_read_word_data; info->read_word_data = ltc2978_read_word_data;
info->pages = LTC2978_NUM_PAGES; info->pages = LTC2978_NUM_PAGES;