hwmon: (ltc2978) Add support for LTC2980 and LTM2987
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
Родитель
acb092cdf9
Коммит
52aae6af71
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@ -6,10 +6,12 @@ Required properties:
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* "lltc,ltc2975"
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* "lltc,ltc2977"
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* "lltc,ltc2978"
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* "lltc,ltc2980"
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* "lltc,ltc3880"
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* "lltc,ltc3882"
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* "lltc,ltc3883"
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* "lltc,ltc3887"
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* "lltc,ltm2987"
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* "lltc,ltm4676"
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- reg: I2C slave address
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@ -21,7 +23,7 @@ Optional properties:
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Valid names of regulators depend on number of supplies supported per device:
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* ltc2974, ltc2975 : vout0 - vout3
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* ltc2977 : vout0 - vout7
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* ltc2977, ltc2980, ltm2987 : vout0 - vout7
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* ltc2978 : vout0 - vout7
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* ltc3880, ltc3882 : vout0 - vout1
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* ltc3883 : vout0
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@ -19,6 +19,10 @@ Supported chips:
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltc2978
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http://www.linear.com/product/ltc2978a
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* Linear Technology LTC2980
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Prefix: 'ltc2980'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltc2980
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* Linear Technology LTC3880
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Prefix: 'ltc3880'
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Addresses scanned: -
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@ -35,6 +39,10 @@ Supported chips:
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Prefix: 'ltc3887'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltc3887
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* Linear Technology LTM2987
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Prefix: 'ltm2987'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltm2987
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* Linear Technology LTM4676
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Prefix: 'ltm4676'
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Addresses scanned: -
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@ -49,9 +57,15 @@ Description
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LTC2974 and LTC2975 are quad digital power supply managers.
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LTC2978 is an octal power supply monitor.
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LTC2977 is a pin compatible replacement for LTC2978.
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LTC2980 is a 16-channel Power System Manager, consisting of two LTC2977
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in a single die. The chip is instantiated and reported as two separate chips
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on two different I2C bus addresses.
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LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC
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controllers.
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LTC3883 is a single phase step-down DC/DC controller.
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LTM2987 is a 16-channel Power System Manager with two LTC2977 plus
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additional components on a single die. The chip is instantiated and reported
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as two separate chips on two different I2C bus addresses.
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LTM4676 is a dual 13A or single 26A uModule regulator.
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@ -75,24 +89,29 @@ in1_label "vin"
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in1_input Measured input voltage.
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in1_min Minimum input voltage.
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in1_max Maximum input voltage.
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LTC2974, LTC2975, LTC2977, and LTC2978 only.
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LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
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LTM2987 only.
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in1_lcrit Critical minimum input voltage.
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LTC2974, LTC2975, LTC2977, and LTC2978 only.
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LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
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LTM2987 only.
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in1_crit Critical maximum input voltage.
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in1_min_alarm Input voltage low alarm.
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in1_max_alarm Input voltage high alarm.
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LTC2974, LTC2975, LTC2977, and LTC2978 only.
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LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
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LTM2987 only.
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in1_lcrit_alarm Input voltage critical low alarm.
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LTC2974, LTC2975, LTC2977, and LTC2978 only.
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LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
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LTM2987 only.
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in1_crit_alarm Input voltage critical high alarm.
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in1_lowest Lowest input voltage.
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LTC2974, LTC2975, LTC2977, and LTC2978 only.
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LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
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LTM2987 only.
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in1_highest Highest input voltage.
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in1_reset_history Reset input voltage history.
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in[N]_label "vout[1-8]".
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LTC2974, LTC2975: N=2-5
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LTC2977: N=2-9
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LTC2977, LTC2980, LTM2987: N=2-9
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LTC2978: N=2-9
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LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
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LTC3883: N=2
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@ -113,24 +132,28 @@ in[N]_reset_history Reset output voltage history.
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temp[N]_input Measured temperature.
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On LTC2974 and LTC2975, temp[1-4] report external
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temperatures, and temp5 reports the chip temperature.
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On LTC2977 and LTC2978, only one temperature measurement
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is supported and reports the chip temperature.
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On LTC2977, LTC2980, LTC2978, and LTM2987, only one
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temperature measurement is supported and reports
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the chip temperature.
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On LTC3880, LTC3882, LTC3887, and LTM4676, temp1 and
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temp2 report external temperatures, and temp3 reports
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the chip temperature.
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On LTC3883, temp1 reports an external temperature,
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and temp2 reports the chip temperature.
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temp[N]_min Mimimum temperature. LTC2974, LCT2977, and LTC2978 only.
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temp[N]_min Mimimum temperature. LTC2974, LCT2977, LTM2980, LTC2978,
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and LTM2987 only.
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temp[N]_max Maximum temperature.
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temp[N]_lcrit Critical low temperature.
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temp[N]_crit Critical high temperature.
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temp[N]_min_alarm Temperature low alarm.
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LTC2974, LTC2975, LTC2977, and LTC2978 only.
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LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
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LTM2987 only.
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temp[N]_max_alarm Temperature high alarm.
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temp[N]_lcrit_alarm Temperature critical low alarm.
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temp[N]_crit_alarm Temperature critical high alarm.
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temp[N]_lowest Lowest measured temperature.
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LTC2974, LTC2975, LTC2977, and LTC2978 only.
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LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
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LTM2987 only.
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Not supported for chip temperature sensor on LTC2974 and
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LTC2975.
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temp[N]_highest Highest measured temperature. Not supported for chip
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@ -143,7 +166,7 @@ power1_input Measured input power.
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power[N]_label "pout[1-4]".
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LTC2974, LTC2975: N=1-4
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LTC2977: Not supported
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LTC2977, LTC2980, LTM2987: Not supported
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LTC2978: Not supported
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LTC3880, LTC3882, LTC3887, LTM4676: N=1-2
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LTC3883: N=2
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@ -158,7 +181,7 @@ curr1_reset_history Reset input current history. LTC3883 only.
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curr[N]_label "iout[1-4]".
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LTC2974, LTC2975: N=1-4
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LTC2977: not supported
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LTC2977, LTC2980, LTM2987: not supported
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LTC2978: not supported
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LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
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LTC3883: N=2
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@ -52,8 +52,8 @@ config SENSORS_LTC2978
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default n
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help
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If you say yes here you get hardware monitoring support for Linear
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Technology LTC2974, LTC2975, LTC2977, LTC2978, LTC3880, LTC3883,
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LTC3887, and LTM4676.
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Technology LTC2974, LTC2975, LTC2977, LTC2978, LTC2980, LTC3880,
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LTC3883, LTC3887, LTCM2987, and LTM4676.
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This driver can also be built as a module. If so, the module will
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be called ltc2978.
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@ -24,8 +24,8 @@
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#include <linux/regulator/driver.h>
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#include "pmbus.h"
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enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
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ltc3887, ltm4676 };
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enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
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ltc3883, ltc3887, ltm2987, ltm4676 };
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/* Common for all chips */
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#define LTC2978_MFR_VOUT_PEAK 0xdd
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@ -33,7 +33,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
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#define LTC2978_MFR_TEMPERATURE_PEAK 0xdf
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#define LTC2978_MFR_SPECIAL_ID 0xe7 /* Undocumented on LTC3882 */
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/* LTC2974, LTC2975, LCT2977, and LTC2978 */
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/* LTC2974, LTC2975, LCT2977, LTC2980, LTC2978, and LTM2987 */
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#define LTC2978_MFR_VOUT_MIN 0xfb
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#define LTC2978_MFR_VIN_MIN 0xfc
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#define LTC2978_MFR_TEMPERATURE_MIN 0xfd
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@ -63,11 +63,15 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
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#define LTC2977_ID 0x0130
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#define LTC2978_ID_REV1 0x0110 /* Early revision */
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#define LTC2978_ID_REV2 0x0120
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#define LTC2980_ID_A 0x8030 /* A/B for two die IDs */
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#define LTC2980_ID_B 0x8040
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#define LTC3880_ID 0x4020
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#define LTC3882_ID 0x4200
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#define LTC3882_ID_D1 0x4240 /* Dash 1 */
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#define LTC3883_ID 0x4300
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#define LTC3887_ID 0x4700
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#define LTM2987_ID_A 0x8010 /* A/B for two die IDs */
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#define LTM2987_ID_B 0x8020
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#define LTM4676_ID_REV1 0x4400
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#define LTM4676_ID_REV2 0x4480
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#define LTM4676A_ID 0x47e0
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@ -409,10 +413,12 @@ static const struct i2c_device_id ltc2978_id[] = {
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{"ltc2975", ltc2975},
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{"ltc2977", ltc2977},
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{"ltc2978", ltc2978},
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{"ltc2980", ltc2980},
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{"ltc3880", ltc3880},
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{"ltc3882", ltc3882},
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{"ltc3883", ltc3883},
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{"ltc3887", ltc3887},
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{"ltm2987", ltm2987},
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{"ltm4676", ltm4676},
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{}
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};
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@ -471,6 +477,8 @@ static int ltc2978_get_id(struct i2c_client *client)
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return ltc2977;
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else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2)
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return ltc2978;
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else if (chip_id == LTC2980_ID_A || chip_id == LTC2980_ID_B)
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return ltc2980;
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else if (chip_id == LTC3880_ID)
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return ltc3880;
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else if (chip_id == LTC3882_ID || chip_id == LTC3882_ID_D1)
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@ -479,6 +487,8 @@ static int ltc2978_get_id(struct i2c_client *client)
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return ltc3883;
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else if (chip_id == LTC3887_ID)
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return ltc3887;
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else if (chip_id == LTM2987_ID_A || chip_id == LTM2987_ID_B)
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return ltm2987;
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else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 ||
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chip_id == LTM4676A_ID)
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return ltm4676;
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@ -559,6 +569,8 @@ static int ltc2978_probe(struct i2c_client *client,
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break;
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case ltc2977:
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case ltc2978:
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case ltc2980:
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case ltm2987:
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info->read_word_data = ltc2978_read_word_data;
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info->pages = LTC2978_NUM_PAGES;
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info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
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@ -634,10 +646,12 @@ static const struct of_device_id ltc2978_of_match[] = {
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{ .compatible = "lltc,ltc2975" },
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{ .compatible = "lltc,ltc2977" },
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{ .compatible = "lltc,ltc2978" },
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{ .compatible = "lltc,ltc2980" },
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{ .compatible = "lltc,ltc3880" },
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{ .compatible = "lltc,ltc3882" },
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{ .compatible = "lltc,ltc3883" },
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{ .compatible = "lltc,ltc3887" },
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{ .compatible = "lltc,ltm2987" },
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{ .compatible = "lltc,ltm4676" },
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{ }
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};
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