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hwmon: (ltc2978) Add support for LTC3886

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LTC3886 is a is a dual PolyPhase DC/DC synchronous step-down switching
regulator controller. It is mostly command compatible to LTC3883,
but supports two phases instead of one.

Suggested-by: Michael Jones <[email protected]>
Tested-by: Michael Jones <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Guenter Roeck 2015-08-17 07:21:43 -07:00
commit 228b687d9e
4 changed files with 39 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/hwmon/pmbus/Kconfig
View file

@ -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, LTC3887, LTCM2987, and LTM4676.
LTC3883, LTC3886, LTC3887, LTCM2987, and LTM4676.
This driver can also be built as a module. If so, the module will
be called ltc2978.

24
drivers/hwmon/pmbus/ltc2978.c
View file

@ -25,7 +25,7 @@
#include "pmbus.h"
enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
ltc3883, ltc3887, ltm2987, ltm4676 };
ltc3883, ltc3886, ltc3887, ltm2987, ltm4676 };
/* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd
@ -47,7 +47,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
#define LTC3880_MFR_CLEAR_PEAKS 0xe3
#define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4
/* LTC3883 only */
/* LTC3883 and LTC3886 only */
#define LTC3883_MFR_IIN_PEAK 0xe1
/* LTC2975 only */
@ -69,6 +69,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
#define LTC3882_ID 0x4200
#define LTC3882_ID_D1 0x4240 /* Dash 1 */
#define LTC3883_ID 0x4300
#define LTC3886_ID 0x4600
#define LTC3887_ID 0x4700
#define LTM2987_ID_A 0x8010 /* A/B for two die IDs */
#define LTM2987_ID_B 0x8020
@ -417,6 +418,7 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc3880", ltc3880},
{"ltc3882", ltc3882},
{"ltc3883", ltc3883},
{"ltc3886", ltc3886},
{"ltc3887", ltc3887},
{"ltm2987", ltm2987},
{"ltm4676", ltm4676},
@ -485,6 +487,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltc3882;
else if (chip_id == LTC3883_ID)
return ltc3883;
else if (chip_id == LTC3886_ID)
return ltc3886;
else if (chip_id == LTC3887_ID)
return ltc3887;
else if (chip_id == LTM2987_ID_A || chip_id == LTM2987_ID_B)
@ -624,6 +628,21 @@ static int ltc2978_probe(struct i2c_client *client,
| PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
| PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP;
break;
case ltc3886:
data->features |= FEAT_CLEAR_PEAKS;
info->read_word_data = ltc3883_read_word_data;
info->pages = LTC3880_NUM_PAGES;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
| PMBUS_HAVE_STATUS_INPUT
| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
| PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
| PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP;
info->func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
| PMBUS_HAVE_POUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
break;
default:
return -ENODEV;
}
@ -650,6 +669,7 @@ static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltc3880" },
{ .compatible = "lltc,ltc3882" },
{ .compatible = "lltc,ltc3883" },
{ .compatible = "lltc,ltc3886" },
{ .compatible = "lltc,ltc3887" },
{ .compatible = "lltc,ltm2987" },
{ .compatible = "lltc,ltm4676" },