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hwmon: (ltc2978) Add support for LTC2980 and LTM2987

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LTC2980 and LTM2987 are command compatible to LTC2977. They consist of
two LTC2977 on a single die, and are instantiated as two separate chips,
each supporting eight channels.

Suggested-by: Michael Jones <mike@proclivis.com>
Tested-by: Michael Jones <mike@proclivis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2015-08-17 06:38:01 -07:00
parent acb092cdf9
commit 52aae6af71
4 changed files with 58 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/hwmon/ltc2978.txt
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@ -6,10 +6,12 @@ Required properties:
* "lltc,ltc2975" * "lltc,ltc2975"
* "lltc,ltc2977" * "lltc,ltc2977"
* "lltc,ltc2978" * "lltc,ltc2978"
* "lltc,ltc2980"
* "lltc,ltc3880" * "lltc,ltc3880"
* "lltc,ltc3882" * "lltc,ltc3882"
* "lltc,ltc3883" * "lltc,ltc3883"
* "lltc,ltc3887" * "lltc,ltc3887"
* "lltc,ltm2987"
* "lltc,ltm4676" * "lltc,ltm4676"
- reg: I2C slave address - reg: I2C slave address
@ -21,7 +23,7 @@ Optional properties:
Valid names of regulators depend on number of supplies supported per device: Valid names of regulators depend on number of supplies supported per device:
* ltc2974, ltc2975 : vout0 - vout3 * ltc2974, ltc2975 : vout0 - vout3
* ltc2977 : vout0 - vout7 * ltc2977, ltc2980, ltm2987 : vout0 - vout7
* ltc2978 : vout0 - vout7 * ltc2978 : vout0 - vout7
* ltc3880, ltc3882 : vout0 - vout1 * ltc3880, ltc3882 : vout0 - vout1
* ltc3883 : vout0 * ltc3883 : vout0

49
Documentation/hwmon/ltc2978
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@ -19,6 +19,10 @@ Supported chips:
Addresses scanned: - Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc2978 Datasheet: http://www.linear.com/product/ltc2978
http://www.linear.com/product/ltc2978a http://www.linear.com/product/ltc2978a
* Linear Technology LTC2980
Prefix: 'ltc2980'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc2980
* Linear Technology LTC3880 * Linear Technology LTC3880
Prefix: 'ltc3880' Prefix: 'ltc3880'
Addresses scanned: - Addresses scanned: -
@ -35,6 +39,10 @@ Supported chips:
Prefix: 'ltc3887' Prefix: 'ltc3887'
Addresses scanned: - Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc3887 Datasheet: http://www.linear.com/product/ltc3887
* Linear Technology LTM2987
Prefix: 'ltm2987'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltm2987
* Linear Technology LTM4676 * Linear Technology LTM4676
Prefix: 'ltm4676' Prefix: 'ltm4676'
Addresses scanned: - Addresses scanned: -
@ -49,9 +57,15 @@ Description
LTC2974 and LTC2975 are quad digital power supply managers. LTC2974 and LTC2975 are quad digital power supply managers.
LTC2978 is an octal power supply monitor. LTC2978 is an octal power supply monitor.
LTC2977 is a pin compatible replacement for LTC2978. LTC2977 is a pin compatible replacement for LTC2978.
LTC2980 is a 16-channel Power System Manager, consisting of two LTC2977
in a single die. The chip is instantiated and reported as two separate chips
on two different I2C bus addresses.
LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC
controllers. controllers.
LTC3883 is a single phase step-down DC/DC controller. LTC3883 is a single phase step-down DC/DC controller.
LTM2987 is a 16-channel Power System Manager with two LTC2977 plus
additional components on a single die. The chip is instantiated and reported
as two separate chips on two different I2C bus addresses.
LTM4676 is a dual 13A or single 26A uModule regulator. LTM4676 is a dual 13A or single 26A uModule regulator.
@ -75,24 +89,29 @@ 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. in1_max Maximum input voltage.
LTC2974, LTC2975, LTC2977, and LTC2978 only. LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
LTM2987 only.
in1_lcrit Critical minimum input voltage. in1_lcrit Critical minimum input voltage.
LTC2974, LTC2975, LTC2977, and LTC2978 only. LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
LTM2987 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. in1_max_alarm Input voltage high alarm.
LTC2974, LTC2975, LTC2977, and LTC2978 only. LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
LTM2987 only.
in1_lcrit_alarm Input voltage critical low alarm. in1_lcrit_alarm Input voltage critical low alarm.
LTC2974, LTC2975, LTC2977, and LTC2978 only. LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
LTM2987 only.
in1_crit_alarm Input voltage critical high alarm. in1_crit_alarm Input voltage critical high alarm.
in1_lowest Lowest input voltage. in1_lowest Lowest input voltage.
LTC2974, LTC2975, LTC2977, and LTC2978 only. LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
LTM2987 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, LTC2975: N=2-5 LTC2974, LTC2975: N=2-5
LTC2977: N=2-9 LTC2977, LTC2980, LTM2987: N=2-9
LTC2978: N=2-9 LTC2978: N=2-9
LTC3880, LTC3882, LTC3887, LTM4676: N=2-3 LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
LTC3883: N=2 LTC3883: N=2
@ -113,24 +132,28 @@ in[N]_reset_history Reset output voltage history.
temp[N]_input Measured temperature. temp[N]_input Measured temperature.
On LTC2974 and LTC2975, temp[1-4] report external On LTC2974 and LTC2975, temp[1-4] report external
temperatures, and temp5 reports the chip temperature. temperatures, and temp5 reports the chip temperature.
On LTC2977 and LTC2978, only one temperature measurement On LTC2977, LTC2980, LTC2978, and LTM2987, only one
is supported and reports the chip temperature. temperature measurement is supported and reports
the chip temperature.
On LTC3880, LTC3882, LTC3887, and LTM4676, temp1 and On LTC3880, LTC3882, LTC3887, and LTM4676, temp1 and
temp2 report external temperatures, and temp3 reports temp2 report external temperatures, and temp3 reports
the chip temperature. 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, LCT2977, and LTC2978 only. temp[N]_min Mimimum temperature. LTC2974, LCT2977, LTM2980, LTC2978,
and LTM2987 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. temp[N]_min_alarm Temperature low alarm.
LTC2974, LTC2975, LTC2977, and LTC2978 only. LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
LTM2987 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. temp[N]_lowest Lowest measured temperature.
LTC2974, LTC2975, LTC2977, and LTC2978 only. LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
LTM2987 only.
Not supported for chip temperature sensor on LTC2974 and Not supported for chip temperature sensor on LTC2974 and
LTC2975. LTC2975.
temp[N]_highest Highest measured temperature. Not supported for chip temp[N]_highest Highest measured temperature. Not supported for chip
@ -143,7 +166,7 @@ power1_input Measured input power.
power[N]_label "pout[1-4]". power[N]_label "pout[1-4]".
LTC2974, LTC2975: N=1-4 LTC2974, LTC2975: N=1-4
LTC2977: Not supported LTC2977, LTC2980, LTM2987: Not supported
LTC2978: Not supported LTC2978: Not supported
LTC3880, LTC3882, LTC3887, LTM4676: N=1-2 LTC3880, LTC3882, LTC3887, LTM4676: N=1-2
LTC3883: N=2 LTC3883: N=2
@ -158,7 +181,7 @@ curr1_reset_history Reset input current history. LTC3883 only.
curr[N]_label "iout[1-4]". curr[N]_label "iout[1-4]".
LTC2974, LTC2975: N=1-4 LTC2974, LTC2975: N=1-4
LTC2977: not supported LTC2977, LTC2980, LTM2987: not supported
LTC2978: not supported LTC2978: not supported
LTC3880, LTC3882, LTC3887, LTM4676: N=2-3 LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
LTC3883: N=2 LTC3883: N=2

4
drivers/hwmon/pmbus/Kconfig
View File

@ -52,8 +52,8 @@ config SENSORS_LTC2978
default n default n
help help
If you say yes here you get hardware monitoring support for Linear If you say yes here you get hardware monitoring support for Linear
Technology LTC2974, LTC2975, LTC2977, LTC2978, LTC3880, LTC3883, Technology LTC2974, LTC2975, LTC2977, LTC2978, LTC2980, LTC3880,
LTC3887, and LTM4676. LTC3883, LTC3887, LTCM2987, and LTM4676.
This driver can also be built as a module. If so, the module will This driver can also be built as a module. If so, the module will
be called ltc2978. be called ltc2978.

20
drivers/hwmon/pmbus/ltc2978.c
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@ -24,8 +24,8 @@
#include <linux/regulator/driver.h> #include <linux/regulator/driver.h>
#include "pmbus.h" #include "pmbus.h"
enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
ltc3887, ltm4676 }; ltc3883, ltc3887, ltm2987, ltm4676 };
/* Common for all chips */ /* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd #define LTC2978_MFR_VOUT_PEAK 0xdd
@ -33,7 +33,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
#define LTC2978_MFR_TEMPERATURE_PEAK 0xdf #define LTC2978_MFR_TEMPERATURE_PEAK 0xdf
#define LTC2978_MFR_SPECIAL_ID 0xe7 /* Undocumented on LTC3882 */ #define LTC2978_MFR_SPECIAL_ID 0xe7 /* Undocumented on LTC3882 */
/* LTC2974, LTC2975, LCT2977, and LTC2978 */ /* LTC2974, LTC2975, LCT2977, LTC2980, LTC2978, and LTM2987 */
#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
@ -63,11 +63,15 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
#define LTC2977_ID 0x0130 #define LTC2977_ID 0x0130
#define LTC2978_ID_REV1 0x0110 /* Early revision */ #define LTC2978_ID_REV1 0x0110 /* Early revision */
#define LTC2978_ID_REV2 0x0120 #define LTC2978_ID_REV2 0x0120
#define LTC2980_ID_A 0x8030 /* A/B for two die IDs */
#define LTC2980_ID_B 0x8040
#define LTC3880_ID 0x4020 #define LTC3880_ID 0x4020
#define LTC3882_ID 0x4200 #define LTC3882_ID 0x4200
#define LTC3882_ID_D1 0x4240 /* Dash 1 */ #define LTC3882_ID_D1 0x4240 /* Dash 1 */
#define LTC3883_ID 0x4300 #define LTC3883_ID 0x4300
#define LTC3887_ID 0x4700 #define LTC3887_ID 0x4700
#define LTM2987_ID_A 0x8010 /* A/B for two die IDs */
#define LTM2987_ID_B 0x8020
#define LTM4676_ID_REV1 0x4400 #define LTM4676_ID_REV1 0x4400
#define LTM4676_ID_REV2 0x4480 #define LTM4676_ID_REV2 0x4480
#define LTM4676A_ID 0x47e0 #define LTM4676A_ID 0x47e0
@ -409,10 +413,12 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc2975", ltc2975}, {"ltc2975", ltc2975},
{"ltc2977", ltc2977}, {"ltc2977", ltc2977},
{"ltc2978", ltc2978}, {"ltc2978", ltc2978},
{"ltc2980", ltc2980},
{"ltc3880", ltc3880}, {"ltc3880", ltc3880},
{"ltc3882", ltc3882}, {"ltc3882", ltc3882},
{"ltc3883", ltc3883}, {"ltc3883", ltc3883},
{"ltc3887", ltc3887}, {"ltc3887", ltc3887},
{"ltm2987", ltm2987},
{"ltm4676", ltm4676}, {"ltm4676", ltm4676},
{} {}
}; };
@ -471,6 +477,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltc2977; return 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)
return ltc2978; return ltc2978;
else if (chip_id == LTC2980_ID_A || chip_id == LTC2980_ID_B)
return ltc2980;
else if (chip_id == LTC3880_ID) else if (chip_id == LTC3880_ID)
return ltc3880; return ltc3880;
else if (chip_id == LTC3882_ID || chip_id == LTC3882_ID_D1) else if (chip_id == LTC3882_ID || chip_id == LTC3882_ID_D1)
@ -479,6 +487,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltc3883; return ltc3883;
else if (chip_id == LTC3887_ID) else if (chip_id == LTC3887_ID)
return ltc3887; return ltc3887;
else if (chip_id == LTM2987_ID_A || chip_id == LTM2987_ID_B)
return ltm2987;
else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 || else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 ||
chip_id == LTM4676A_ID) chip_id == LTM4676A_ID)
return ltm4676; return ltm4676;
@ -559,6 +569,8 @@ static int ltc2978_probe(struct i2c_client *client,
break; break;
case ltc2977: case ltc2977:
case ltc2978: case ltc2978:
case ltc2980:
case ltm2987:
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;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
@ -634,10 +646,12 @@ static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltc2975" }, { .compatible = "lltc,ltc2975" },
{ .compatible = "lltc,ltc2977" }, { .compatible = "lltc,ltc2977" },
{ .compatible = "lltc,ltc2978" }, { .compatible = "lltc,ltc2978" },
{ .compatible = "lltc,ltc2980" },
{ .compatible = "lltc,ltc3880" }, { .compatible = "lltc,ltc3880" },
{ .compatible = "lltc,ltc3882" }, { .compatible = "lltc,ltc3882" },
{ .compatible = "lltc,ltc3883" }, { .compatible = "lltc,ltc3883" },
{ .compatible = "lltc,ltc3887" }, { .compatible = "lltc,ltc3887" },
{ .compatible = "lltc,ltm2987" },
{ .compatible = "lltc,ltm4676" }, { .compatible = "lltc,ltm4676" },
{ } { }
}; };