hwmon: (pmbus/ltc2978) Add support for LTM4676
The chip's programming interface is quite similar to LTC3880 and supports the same set of sensors. Reviewed-by: Robert Coulson <rob.coulson@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
parent
a2e1510743
commit
f76992b00a
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@ -23,6 +23,10 @@ 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 LTM4676
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Prefix: 'ltm4676'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltm4676
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Author: Guenter Roeck <linux@roeck-us.net>
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@ -33,7 +37,8 @@ Description
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LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
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monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
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output poly-phase step-down DC/DC controller. LTC3883 is a single phase
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step-down DC/DC controller.
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step-down DC/DC controller. LTM4676 is a dual 13A or single 26A uModule
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regulator.
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Usage Notes
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@ -75,7 +80,7 @@ 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: N=2-3
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LTC3880, 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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@ -95,7 +100,7 @@ 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, temp1 and temp2 report external
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On LTC3880 and LTM4676, temp1 and temp2 report external
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temperatures, and temp3 reports 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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@ -123,11 +128,11 @@ 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: N=1-2
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LTC3880, 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 and LTC3883 only.
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curr1_label "iin". LTC3880, LTC3883, 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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@ -138,7 +143,7 @@ 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: N=2-3
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LTC3880, 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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@ -1,9 +1,9 @@
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/*
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* Hardware monitoring driver for LTC2974, LTC2977, LTC2978, LTC3880,
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* and LTC3883
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* LTC3883, and LTM4676
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*
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* Copyright (c) 2011 Ericsson AB.
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* Copyright (c) 2013 Guenter Roeck
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* Copyright (c) 2013, 2014 Guenter Roeck
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -14,10 +14,6 @@
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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@ -28,7 +24,7 @@
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#include <linux/i2c.h>
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#include "pmbus.h"
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enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
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enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 };
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/* Common for all chips */
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#define LTC2978_MFR_VOUT_PEAK 0xdd
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@ -45,7 +41,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
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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 and LTC3883 */
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/* LTC3880, LTC3883, 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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@ -63,6 +59,8 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
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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 LTM4676_ID 0x4480 /* datasheet claims 0x440X */
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#define LTM4676_ID_MASK 0xfff0
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#define LTC2974_NUM_PAGES 4
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#define LTC2978_NUM_PAGES 8
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@ -371,6 +369,7 @@ static const struct i2c_device_id ltc2978_id[] = {
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{"ltc2978", ltc2978},
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{"ltc3880", ltc3880},
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{"ltc3883", ltc3883},
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{"ltm4676", ltm4676},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ltc2978_id);
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@ -406,6 +405,8 @@ static int ltc2978_probe(struct i2c_client *client,
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data->id = ltc3880;
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} else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID) {
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data->id = ltc3883;
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} else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID) {
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data->id = ltm4676;
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} else {
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dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
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return -ENODEV;
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@ -459,6 +460,7 @@ 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 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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info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
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@ -501,5 +503,5 @@ static struct i2c_driver ltc2978_driver = {
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module_i2c_driver(ltc2978_driver);
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("PMBus driver for LTC2974, LTC2978, LTC3880, and LTC3883");
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MODULE_DESCRIPTION("PMBus driver for LTC2974, LTC2978, LTC3880, LTC3883, and LTM4676");
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MODULE_LICENSE("GPL");
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