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Commit ccf2dc51 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (ltc2978) Add support for LTM4675 



LTM2975 is a dual 9A or single 18A μModule regulator.
It is register compatible with LTM4676.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent e04d1ce9

Documentation/hwmon/ltc2978

+16 −8
Original line number Diff line number Diff line
@@ -47,6 +47,10 @@ Supported chips: 
    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: -
@@ -70,6 +74,7 @@ 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.
@@ -117,7 +122,8 @@ 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, LTM4676: N=2-3

			LTC3880, LTC3882, LTC23886 LTC3887, LTM4675, LTM4676:

				N=2-3

			LTC3883: N=2

in[N]_input		Measured output voltage.

in[N]_min		Minimum output voltage.
@@ -139,9 +145,9 @@ temp[N]_input Measured temperature. 
			On LTC2977, LTC2980, LTC2978, and LTM2987, only one

			temperature measurement is supported and reports

			the chip temperature.

			On LTC3880, LTC3882, LTC3887, and LTM4676, temp1 and

			temp2 report external temperatures, and temp3 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,
@@ -172,12 +178,13 @@ power[N]_label "pout[1-4]". 
			LTC2974, LTC2975: N=1-4

			LTC2977, LTC2980, LTM2987: Not supported

			LTC2978: Not supported

			LTC3880, LTC3882, LTC3886, LTC3887, LTM4676: N=1-2

			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, and LTM4676

			only.

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.
@@ -188,7 +195,8 @@ curr[N]_label "iout[1-4]". 
			LTC2974, LTC2975: N=1-4

			LTC2977, LTC2980, LTM2987: not supported

			LTC2978: not supported

			LTC3880, LTC3882, LTC3886, LTC3887, LTM4676: N=2-3

			LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676:

				N=2-3

			LTC3883: N=2

curr[N]_input		Measured output current.

curr[N]_max		Maximum output current.

drivers/hwmon/pmbus/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -53,7 +53,7 @@ config SENSORS_LTC2978 
	help

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

	  Technology LTC2974, LTC2975, LTC2977, LTC2978, LTC2980, LTC3880,

	  LTC3883, LTC3886, LTC3887, LTCM2987, and LTM4676.

	  LTC3883, LTC3886, LTC3887, LTCM2987, LTM4675, and LTM4676.



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

	  be called ltc2978.

drivers/hwmon/pmbus/ltc2978.c

+8 −2
Original line number Diff line number Diff line
@@ -28,7 +28,7 @@ 
#include "pmbus.h"



enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,

	ltc3883, ltc3886, ltc3887, ltm2987, ltm4676 };

	ltc3883, ltc3886, ltc3887, ltm2987, ltm4675, ltm4676 };



/* Common for all chips */

#define LTC2978_MFR_VOUT_PEAK		0xdd
@@ -46,7 +46,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882, 
#define LTC2974_MFR_IOUT_PEAK		0xd7

#define LTC2974_MFR_IOUT_MIN		0xd8



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

/* LTC3880, LTC3882, LTC3883, LTC3887, LTM4675, and LTM4676 */

#define LTC3880_MFR_IOUT_PEAK		0xd7

#define LTC3880_MFR_CLEAR_PEAKS		0xe3

#define LTC3880_MFR_TEMPERATURE2_PEAK	0xf4
@@ -77,6 +77,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882, 
#define LTC3887_ID			0x4700

#define LTM2987_ID_A			0x8010	/* A/B for two die IDs */

#define LTM2987_ID_B			0x8020

#define LTM4675_ID			0x47a0

#define LTM4676_ID_REV1			0x4400

#define LTM4676_ID_REV2			0x4480

#define LTM4676A_ID			0x47e0
@@ -509,6 +510,7 @@ static const struct i2c_device_id ltc2978_id[] = { 
	{"ltc3886", ltc3886},

	{"ltc3887", ltc3887},

	{"ltm2987", ltm2987},

	{"ltm4675", ltm4675},

	{"ltm4676", ltm4676},

	{}

};
@@ -581,6 +583,8 @@ static int ltc2978_get_id(struct i2c_client *client) 
		return ltc3887;

	else if (chip_id == LTM2987_ID_A || chip_id == LTM2987_ID_B)

		return ltm2987;

	else if (chip_id == LTM4675_ID)

		return ltm4675;

	else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 ||

		 chip_id == LTM4676A_ID)

		return ltm4676;
@@ -678,6 +682,7 @@ static int ltc2978_probe(struct i2c_client *client, 
		break;

	case ltc3880:

	case ltc3887:

	case ltm4675:

	case ltm4676:

		data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING;

		info->read_word_data = ltc3880_read_word_data;
@@ -763,6 +768,7 @@ static const struct of_device_id ltc2978_of_match[] = { 
	{ .compatible = "lltc,ltc3886" },

	{ .compatible = "lltc,ltc3887" },

	{ .compatible = "lltc,ltm2987" },

	{ .compatible = "lltc,ltm4675" },

	{ .compatible = "lltc,ltm4676" },

	{ }

};