| Kernel driver ltc2978 | |
| ===================== | |
| Supported chips: | |
| * Linear Technology LTC2974 | |
| Prefix: 'ltc2974' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc2974 | |
| * Linear Technology LTC2975 | |
| Prefix: 'ltc2975' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc2975 | |
| * Linear Technology LTC2977 | |
| Prefix: 'ltc2977' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc2977 | |
| * Linear Technology LTC2978, LTC2978A | |
| Prefix: 'ltc2978' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc2978 | |
| http://www.linear.com/product/ltc2978a | |
| * Linear Technology LTC2980 | |
| Prefix: 'ltc2980' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc2980 | |
| * Linear Technology LTC3880 | |
| Prefix: 'ltc3880' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc3880 | |
| * Linear Technology LTC3882 | |
| Prefix: 'ltc3882' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc3882 | |
| * Linear Technology LTC3883 | |
| Prefix: 'ltc3883' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc3883 | |
| * Linear Technology LTC3886 | |
| Prefix: 'ltc3886' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc3886 | |
| * Linear Technology LTC3887 | |
| Prefix: 'ltc3887' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltc3887 | |
| * Linear Technology LTM2987 | |
| Prefix: 'ltm2987' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltm2987 | |
| * Linear Technology LTM4675 | |
| Prefix: 'ltm4675' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltm4675 | |
| * Linear Technology LTM4676 | |
| Prefix: 'ltm4676' | |
| Addresses scanned: - | |
| Datasheet: http://www.linear.com/product/ltm4676 | |
| Author: Guenter Roeck <linux@roeck-us.net> | |
| Description | |
| ----------- | |
| LTC2974 and LTC2975 are quad digital power supply managers. | |
| LTC2978 is an octal power supply monitor. | |
| 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, LTC3886, and LTC3887 are dual output poly-phase step-down | |
| DC/DC controllers. | |
| 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. | |
| LTM4675 is a dual 9A or single 18A μModule regulator | |
| LTM4676 is a dual 13A or single 26A uModule regulator. | |
| Usage Notes | |
| ----------- | |
| This driver does not probe for PMBus devices. You will have to instantiate | |
| devices explicitly. | |
| Example: the following commands will load the driver for an LTC2978 at address | |
| 0x60 on I2C bus #1: | |
| # modprobe ltc2978 | |
| # echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device | |
| Sysfs attributes | |
| ---------------- | |
| in1_label "vin" | |
| in1_input Measured input voltage. | |
| in1_min Minimum input voltage. | |
| in1_max Maximum input voltage. | |
| LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and | |
| LTM2987 only. | |
| in1_lcrit Critical minimum input voltage. | |
| LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and | |
| LTM2987 only. | |
| in1_crit Critical maximum input voltage. | |
| in1_min_alarm Input voltage low alarm. | |
| in1_max_alarm Input voltage high alarm. | |
| LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and | |
| LTM2987 only. | |
| in1_lcrit_alarm Input voltage critical low alarm. | |
| LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and | |
| LTM2987 only. | |
| in1_crit_alarm Input voltage critical high alarm. | |
| in1_lowest Lowest input voltage. | |
| LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and | |
| LTM2987 only. | |
| in1_highest Highest input voltage. | |
| in1_reset_history Reset input voltage history. | |
| in[N]_label "vout[1-8]". | |
| LTC2974, LTC2975: N=2-5 | |
| LTC2977, LTC2980, LTM2987: N=2-9 | |
| LTC2978: N=2-9 | |
| LTC3880, LTC3882, LTC23886 LTC3887, LTM4675, LTM4676: | |
| N=2-3 | |
| LTC3883: N=2 | |
| in[N]_input Measured output voltage. | |
| in[N]_min Minimum output voltage. | |
| in[N]_max Maximum output voltage. | |
| in[N]_lcrit Critical minimum output voltage. | |
| in[N]_crit Critical maximum output voltage. | |
| in[N]_min_alarm Output voltage low alarm. | |
| in[N]_max_alarm Output voltage high alarm. | |
| in[N]_lcrit_alarm Output voltage critical low alarm. | |
| in[N]_crit_alarm Output voltage critical high alarm. | |
| in[N]_lowest Lowest output voltage. LTC2974, LTC2975, | |
| and LTC2978 only. | |
| in[N]_highest Highest output voltage. | |
| in[N]_reset_history Reset output voltage history. | |
| temp[N]_input Measured temperature. | |
| On LTC2974 and LTC2975, temp[1-4] report external | |
| temperatures, and temp5 reports the chip temperature. | |
| On LTC2977, LTC2980, LTC2978, and LTM2987, only one | |
| temperature measurement is supported and reports | |
| the chip temperature. | |
| On LTC3880, LTC3882, LTC3887, LTM4675, and LTM4676, | |
| temp1 and temp2 report external temperatures, and temp3 | |
| reports the chip temperature. | |
| On LTC3883, temp1 reports an external temperature, | |
| and temp2 reports the chip temperature. | |
| temp[N]_min Mimimum temperature. LTC2974, LCT2977, LTM2980, LTC2978, | |
| and LTM2987 only. | |
| temp[N]_max Maximum temperature. | |
| temp[N]_lcrit Critical low temperature. | |
| temp[N]_crit Critical high temperature. | |
| temp[N]_min_alarm Temperature low alarm. | |
| LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and | |
| LTM2987 only. | |
| temp[N]_max_alarm Temperature high alarm. | |
| temp[N]_lcrit_alarm Temperature critical low alarm. | |
| temp[N]_crit_alarm Temperature critical high alarm. | |
| temp[N]_lowest Lowest measured temperature. | |
| LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and | |
| LTM2987 only. | |
| Not supported for chip temperature sensor on LTC2974 and | |
| LTC2975. | |
| temp[N]_highest Highest measured temperature. Not supported for chip | |
| temperature sensor on LTC2974 and LTC2975. | |
| temp[N]_reset_history Reset temperature history. Not supported for chip | |
| temperature sensor on LTC2974 and LTC2975. | |
| power1_label "pin". LTC3883 and LTC3886 only. | |
| power1_input Measured input power. | |
| power[N]_label "pout[1-4]". | |
| LTC2974, LTC2975: N=1-4 | |
| LTC2977, LTC2980, LTM2987: Not supported | |
| LTC2978: Not supported | |
| LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676: | |
| N=1-2 | |
| LTC3883: N=2 | |
| power[N]_input Measured output power. | |
| curr1_label "iin". LTC3880, LTC3883, LTC3886, LTC3887, LTM4675, | |
| and LTM4676 only. | |
| curr1_input Measured input current. | |
| curr1_max Maximum input current. | |
| curr1_max_alarm Input current high alarm. | |
| curr1_highest Highest input current. LTC3883 and LTC3886 only. | |
| curr1_reset_history Reset input current history. LTC3883 and LTC3886 only. | |
| curr[N]_label "iout[1-4]". | |
| LTC2974, LTC2975: N=1-4 | |
| LTC2977, LTC2980, LTM2987: not supported | |
| LTC2978: not supported | |
| LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676: | |
| N=2-3 | |
| LTC3883: N=2 | |
| curr[N]_input Measured output current. | |
| curr[N]_max Maximum output current. | |
| curr[N]_crit Critical high output current. | |
| curr[N]_lcrit Critical low output current. LTC2974 and LTC2975 only. | |
| curr[N]_max_alarm Output current high alarm. | |
| curr[N]_crit_alarm Output current critical high alarm. | |
| curr[N]_lcrit_alarm Output current critical low alarm. | |
| LTC2974 and LTC2975 only. | |
| curr[N]_lowest Lowest output current. LTC2974 and LTC2975 only. | |
| curr[N]_highest Highest output current. | |
| curr[N]_reset_history Reset output current history. |