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drivers: hwmon: (pmbus/ltc2978) Add support for LTM4686 uModule

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This patch adds support for LTM4686 Ultrathin Dual 10A or
Single 20A uModule Regulator with Digital Power System Management.

Datasheet: http://www.analog.com/ltm4686

Signed-off-by: Michael Hennerich <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Michael Hennerich 2018-08-14 14:18:28 +02:00 • committed by Guenter Roeck
commit 4e15d05d9c
4 changed files with 17 additions and 2 deletions
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3
drivers/hwmon/pmbus/Kconfig
View file

@ -83,7 +83,8 @@ config SENSORS_LTC2978_REGULATOR
depends on SENSORS_LTC2978 && REGULATOR
help
If you say yes here you get regulator support for Linear
Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, and LTM4676.
Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, LTM4676
and LTM4686.
config SENSORS_LTC3815
tristate "Linear Technologies LTC3815"

9
drivers/hwmon/pmbus/ltc2978.c
View file

@ -4,6 +4,7 @@
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2013, 2014, 2015 Guenter Roeck
* Copyright (c) 2015 Linear Technology
* Copyright (c) 2018 Analog Devices Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -28,7 +29,7 @@
#include "pmbus.h"
enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
ltc3883, ltc3886, ltc3887, ltm2987, ltm4675, ltm4676 };
ltc3883, ltc3886, ltc3887, ltm2987, ltm4675, ltm4676, ltm4686 };
/* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd
@ -81,6 +82,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
#define LTM4676_ID_REV1 0x4400
#define LTM4676_ID_REV2 0x4480
#define LTM4676A_ID 0x47e0
#define LTM4686_ID 0x4770
#define LTC2974_NUM_PAGES 4
#define LTC2978_NUM_PAGES 8
@ -512,6 +514,7 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltm2987", ltm2987},
{"ltm4675", ltm4675},
{"ltm4676", ltm4676},
{"ltm4686", ltm4686},
{}
};
MODULE_DEVICE_TABLE(i2c, ltc2978_id);
@ -588,6 +591,8 @@ static int ltc2978_get_id(struct i2c_client *client)
else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 ||
chip_id == LTM4676A_ID)
return ltm4676;
else if (chip_id == LTM4686_ID)
return ltm4686;
dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
return -ENODEV;
@ -684,6 +689,7 @@ static int ltc2978_probe(struct i2c_client *client,
case ltc3887:
case ltm4675:
case ltm4676:
case ltm4686:
data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING;
info->read_word_data = ltc3880_read_word_data;
info->pages = LTC3880_NUM_PAGES;
@ -770,6 +776,7 @@ static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltm2987" },
{ .compatible = "lltc,ltm4675" },
{ .compatible = "lltc,ltm4676" },
{ .compatible = "lltc,ltm4686" },
{ }
};
MODULE_DEVICE_TABLE(of, ltc2978_of_match);