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Commit 15398566 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (ltc2978) Add support for LTC3887 



LTC3887 is an enhanced version of LTC3880 and supports the same commands.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent e8047a26

Documentation/devicetree/bindings/hwmon/ltc2978.txt

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ Required properties: 
  * "lltc,ltc3880"

  * "lltc,ltc3882"

  * "lltc,ltc3883"

  * "lltc,ltc3887"

  * "lltc,ltm4676"

- reg: I2C slave address

Documentation/hwmon/ltc2978

+12 −7
Original line number Diff line number Diff line
@@ -27,6 +27,10 @@ Supported chips: 
    Prefix: 'ltc3883'

    Addresses scanned: -

    Datasheet: http://www.linear.com/product/ltc3883

  * Linear Technology LTC3887

    Prefix: 'ltc3887'

    Addresses scanned: -

    Datasheet: http://www.linear.com/product/ltc3887

  * Linear Technology LTM4676

    Prefix: 'ltm4676'

    Addresses scanned: -
@@ -41,7 +45,8 @@ Description 
LTC2974 is a quad digital power supply managers.

LTC2978 is an octal power supply monitor.

LTC2977 is a pin compatible replacement for LTC2978.

LTC3880 and LTC3882 are dual output poly-phase step-down DC/DC controllers.

LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC

controllers.

LTC3883 is a single phase step-down DC/DC controller.

LTM4676 is a dual 13A or single 26A uModule regulator.
@@ -85,7 +90,7 @@ in[N]_label "vout[1-8]". 
			LTC2974: N=2-5

			LTC2977: N=2-9

			LTC2978: N=2-9

			LTC3880, LTC3882, LTM4676: N=2-3

			LTC3880, LTC3882, LTC3887, LTM4676: N=2-3

			LTC3883: N=2

in[N]_input		Measured output voltage.

in[N]_min		Minimum output voltage.
@@ -105,8 +110,8 @@ temp[N]_input Measured temperature. 
			and temp5 reports the chip temperature.

			On LTC2977 and LTC2978, only one temperature measurement

			is supported and reports the chip temperature.

			On LTC3880, LTC3882, and LTM4676, temp1 and temp2

			report external temperatures, and temp3 reports

			On LTC3880, LTC3882, LTC3887, 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.
@@ -134,11 +139,11 @@ power[N]_label "pout[1-4]". 
			LTC2974: N=1-4

			LTC2977: Not supported

			LTC2978: Not supported

			LTC3880, LTC3882, LTM4676: N=1-2

			LTC3880, LTC3882, LTC3887, LTM4676: N=1-2

			LTC3883: N=2

power[N]_input		Measured output power.



curr1_label		"iin". LTC3880, LTC3883, and LTM4676 only.

curr1_label		"iin". LTC3880, LTC3883, LTC3887, and LTM4676 only.

curr1_input		Measured input current.

curr1_max		Maximum input current.

curr1_max_alarm		Input current high alarm.
@@ -149,7 +154,7 @@ curr[N]_label "iout[1-4]". 
			LTC2974: N=1-4

			LTC2977: not supported

			LTC2978: not supported

			LTC3880, LTC3882, LTM4676: N=2-3

			LTC3880, LTC3882, LTC3887, LTM4676: N=2-3

			LTC3883: N=2

curr[N]_input		Measured output current.

curr[N]_max		Maximum output current.

drivers/hwmon/pmbus/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -52,7 +52,8 @@ config SENSORS_LTC2978 
	default n

	help

	  If you say yes here you get hardware monitoring support for Linear

	  Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, and LTM4676.

	  Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, LTC3887,

	  and LTM4676.



	  This driver can also be built as a module. If so, the module will

	  be called ltc2978.

drivers/hwmon/pmbus/ltc2978.c

+14 −5
Original line number Diff line number Diff line 
/*

 * Hardware monitoring driver for LTC2974, LTC2977, LTC2978, LTC3880,

 * LTC3883, and LTM4676

 * LTC3883, LTC3887. and LTM4676

 *

 * Copyright (c) 2011 Ericsson AB.

 * Copyright (c) 2013, 2014 Guenter Roeck
@@ -25,7 +25,8 @@ 
#include <linux/regulator/driver.h>

#include "pmbus.h"



enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 };

enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltc3887,

	     ltm4676 };



/* Common for all chips */

#define LTC2978_MFR_VOUT_PEAK		0xdd
@@ -42,7 +43,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 }; 
#define LTC2974_MFR_IOUT_PEAK		0xd7

#define LTC2974_MFR_IOUT_MIN		0xd8



/* LTC3880, LTC3882, LTC3883, and LTM4676 */

/* LTC3880, LTC3882, LTC3883, LTC3887, and LTM4676 */

#define LTC3880_MFR_IOUT_PEAK		0xd7

#define LTC3880_MFR_CLEAR_PEAKS		0xe3

#define LTC3880_MFR_TEMPERATURE2_PEAK	0xf4
@@ -60,9 +61,11 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 }; 
#define LTC3880_ID_MASK			0xff00

#define LTC3883_ID			0x4300

#define LTC3883_ID_MASK			0xff00

#define LTC3887_ID			0x4700

#define LTC3887_ID_MASK			0xff00

#define LTM4676_ID			0x4400

#define LTM4676_ID_2			0x4480

#define LTM4676A_ID			0x47E0

#define LTM4676A_ID			0x47e0

#define LTM4676_ID_MASK			0xfff0



#define LTC2974_NUM_PAGES		4
@@ -315,7 +318,8 @@ static int ltc2978_clear_peaks(struct i2c_client *client, int page, 
{

	int ret;



	if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltm4676)

	if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltc3887 ||

	    id == ltm4676)

		ret = pmbus_write_byte(client, 0, LTC3880_MFR_CLEAR_PEAKS);

	else

		ret = pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
@@ -373,6 +377,7 @@ static const struct i2c_device_id ltc2978_id[] = { 
	{"ltc3880", ltc3880},

	{"ltc3882", ltc3882},

	{"ltc3883", ltc3883},

	{"ltc3887", ltc3887},

	{"ltm4676", ltm4676},

	{}

};
@@ -432,6 +437,8 @@ static int ltc2978_get_id(struct i2c_client *client) 
		return ltc3880;

	else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID)

		return ltc3883;

	else if ((chip_id & LTC3887_ID_MASK) == LTC3887_ID)

		return ltc3887;

	else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID ||

		 (chip_id & LTM4676_ID_MASK) == LTM4676_ID_2 ||

		 (chip_id & LTM4676_ID_MASK) == LTM4676A_ID)
@@ -511,6 +518,7 @@ static int ltc2978_probe(struct i2c_client *client, 
		}

		break;

	case ltc3880:

	case ltc3887:

	case ltm4676:

		info->read_word_data = ltc3880_read_word_data;

		info->pages = LTC3880_NUM_PAGES;
@@ -573,6 +581,7 @@ static const struct of_device_id ltc2978_of_match[] = { 
	{ .compatible = "lltc,ltc3880" },

	{ .compatible = "lltc,ltc3882" },

	{ .compatible = "lltc,ltc3883" },

	{ .compatible = "lltc,ltc3887" },

	{ .compatible = "lltc,ltm4676" },

	{ }

};