hwmon: (ltc2978) Add support for LTC3887
LTC3887 is an enhanced version of LTC3880 and supports the same commands. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
parent
e8047a2686
commit
15398566f0
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@ -8,6 +8,7 @@ Required properties:
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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,ltm4676"
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- reg: I2C slave address
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@ -27,6 +27,10 @@ Supported chips:
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Prefix: 'ltc3883'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltc3883
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* Linear Technology LTC3887
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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 LTM4676
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Prefix: 'ltm4676'
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Addresses scanned: -
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@ -41,7 +45,8 @@ Description
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LTC2974 is a 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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LTC3880 and LTC3882 are dual output poly-phase step-down DC/DC controllers.
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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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LTM4676 is a dual 13A or single 26A uModule regulator.
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@ -85,7 +90,7 @@ in[N]_label "vout[1-8]".
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LTC2974: N=2-5
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LTC2977: N=2-9
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LTC2978: N=2-9
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LTC3880, LTC3882, LTM4676: N=2-3
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LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
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LTC3883: N=2
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in[N]_input Measured output voltage.
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in[N]_min Minimum output voltage.
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@ -105,8 +110,8 @@ temp[N]_input Measured temperature.
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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 LTC3880, LTC3882, and LTM4676, temp1 and temp2
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report external temperatures, and temp3 reports
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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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@ -134,11 +139,11 @@ power[N]_label "pout[1-4]".
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LTC2974: N=1-4
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LTC2977: Not supported
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LTC2978: Not supported
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LTC3880, LTC3882, LTM4676: N=1-2
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LTC3880, LTC3882, LTC3887, LTM4676: N=1-2
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LTC3883: N=2
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power[N]_input Measured output power.
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curr1_label "iin". LTC3880, LTC3883, and LTM4676 only.
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curr1_label "iin". LTC3880, LTC3883, LTC3887, and LTM4676 only.
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curr1_input Measured input current.
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curr1_max Maximum input current.
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curr1_max_alarm Input current high alarm.
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@ -149,7 +154,7 @@ curr[N]_label "iout[1-4]".
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LTC2974: N=1-4
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LTC2977: not supported
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LTC2978: not supported
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LTC3880, LTC3882, LTM4676: N=2-3
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LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
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LTC3883: N=2
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curr[N]_input Measured output current.
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curr[N]_max Maximum output current.
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@ -52,7 +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, LTC2977, LTC2978, LTC3880, LTC3883, and LTM4676.
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Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, LTC3887,
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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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@ -1,6 +1,6 @@
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/*
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* Hardware monitoring driver for LTC2974, LTC2977, LTC2978, LTC3880,
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* LTC3883, and LTM4676
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* LTC3883, LTC3887. and LTM4676
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*
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* Copyright (c) 2011 Ericsson AB.
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* Copyright (c) 2013, 2014 Guenter Roeck
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@ -25,7 +25,8 @@
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#include <linux/regulator/driver.h>
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#include "pmbus.h"
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enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 };
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enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltc3887,
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ltm4676 };
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/* Common for all chips */
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#define LTC2978_MFR_VOUT_PEAK 0xdd
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@ -42,7 +43,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 };
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#define LTC2974_MFR_IOUT_PEAK 0xd7
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#define LTC2974_MFR_IOUT_MIN 0xd8
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/* LTC3880, LTC3882, LTC3883, and LTM4676 */
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/* LTC3880, LTC3882, LTC3883, LTC3887, and LTM4676 */
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#define LTC3880_MFR_IOUT_PEAK 0xd7
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#define LTC3880_MFR_CLEAR_PEAKS 0xe3
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#define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4
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@ -60,9 +61,11 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 };
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#define LTC3880_ID_MASK 0xff00
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#define LTC3883_ID 0x4300
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#define LTC3883_ID_MASK 0xff00
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#define LTC3887_ID 0x4700
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#define LTC3887_ID_MASK 0xff00
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#define LTM4676_ID 0x4400
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#define LTM4676_ID_2 0x4480
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#define LTM4676A_ID 0x47E0
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#define LTM4676A_ID 0x47e0
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#define LTM4676_ID_MASK 0xfff0
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#define LTC2974_NUM_PAGES 4
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@ -315,7 +318,8 @@ static int ltc2978_clear_peaks(struct i2c_client *client, int page,
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{
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int ret;
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if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltm4676)
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if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltc3887 ||
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id == ltm4676)
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ret = pmbus_write_byte(client, 0, LTC3880_MFR_CLEAR_PEAKS);
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else
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ret = pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
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@ -373,6 +377,7 @@ static const struct i2c_device_id ltc2978_id[] = {
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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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{"ltm4676", ltm4676},
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{}
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};
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@ -432,6 +437,8 @@ static int ltc2978_get_id(struct i2c_client *client)
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return ltc3880;
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else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID)
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return ltc3883;
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else if ((chip_id & LTC3887_ID_MASK) == LTC3887_ID)
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return ltc3887;
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else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID ||
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(chip_id & LTM4676_ID_MASK) == LTM4676_ID_2 ||
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(chip_id & LTM4676_ID_MASK) == LTM4676A_ID)
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@ -511,6 +518,7 @@ static int ltc2978_probe(struct i2c_client *client,
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}
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break;
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case ltc3880:
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case ltc3887:
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case ltm4676:
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info->read_word_data = ltc3880_read_word_data;
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info->pages = LTC3880_NUM_PAGES;
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@ -573,6 +581,7 @@ static const struct of_device_id ltc2978_of_match[] = {
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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,ltm4676" },
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{ }
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};
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