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hwmon: (ltc2978) Add support for LTC2980 and LTM2987

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LTC2980 and LTM2987 are command compatible to LTC2977. They consist of
two LTC2977 on a single die, and are instantiated as two separate chips,
each supporting eight channels.

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 06:38:01 -07:00
commit 52aae6af71
4 changed files with 58 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/hwmon/pmbus/Kconfig
View file

@ -52,8 +52,8 @@ config SENSORS_LTC2978
default n
help
If you say yes here you get hardware monitoring support for Linear
Technology LTC2974, LTC2975, LTC2977, LTC2978, LTC3880, LTC3883,
LTC3887, and LTM4676.
Technology LTC2974, LTC2975, LTC2977, LTC2978, LTC2980, LTC3880,
LTC3883, LTC3887, LTCM2987, and LTM4676.
This driver can also be built as a module. If so, the module will
be called ltc2978.

20
drivers/hwmon/pmbus/ltc2978.c
View file

@ -24,8 +24,8 @@
#include <linux/regulator/driver.h>
#include "pmbus.h"
enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
ltc3887, ltm4676 };
enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
ltc3883, ltc3887, ltm2987, ltm4676 };
/* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd
@ -33,7 +33,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
#define LTC2978_MFR_TEMPERATURE_PEAK 0xdf
#define LTC2978_MFR_SPECIAL_ID 0xe7 /* Undocumented on LTC3882 */
/* LTC2974, LTC2975, LCT2977, and LTC2978 */
/* LTC2974, LTC2975, LCT2977, LTC2980, LTC2978, and LTM2987 */
#define LTC2978_MFR_VOUT_MIN 0xfb
#define LTC2978_MFR_VIN_MIN 0xfc
#define LTC2978_MFR_TEMPERATURE_MIN 0xfd
@ -63,11 +63,15 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883,
#define LTC2977_ID 0x0130
#define LTC2978_ID_REV1 0x0110 /* Early revision */
#define LTC2978_ID_REV2 0x0120
#define LTC2980_ID_A 0x8030 /* A/B for two die IDs */
#define LTC2980_ID_B 0x8040
#define LTC3880_ID 0x4020
#define LTC3882_ID 0x4200
#define LTC3882_ID_D1 0x4240 /* Dash 1 */
#define LTC3883_ID 0x4300
#define LTC3887_ID 0x4700
#define LTM2987_ID_A 0x8010 /* A/B for two die IDs */
#define LTM2987_ID_B 0x8020
#define LTM4676_ID_REV1 0x4400
#define LTM4676_ID_REV2 0x4480
#define LTM4676A_ID 0x47e0
@ -409,10 +413,12 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc2975", ltc2975},
{"ltc2977", ltc2977},
{"ltc2978", ltc2978},
{"ltc2980", ltc2980},
{"ltc3880", ltc3880},
{"ltc3882", ltc3882},
{"ltc3883", ltc3883},
{"ltc3887", ltc3887},
{"ltm2987", ltm2987},
{"ltm4676", ltm4676},
{}
};
@ -471,6 +477,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltc2977;
else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2)
return ltc2978;
else if (chip_id == LTC2980_ID_A || chip_id == LTC2980_ID_B)
return ltc2980;
else if (chip_id == LTC3880_ID)
return ltc3880;
else if (chip_id == LTC3882_ID || chip_id == LTC3882_ID_D1)
@ -479,6 +487,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltc3883;
else if (chip_id == LTC3887_ID)
return ltc3887;
else if (chip_id == LTM2987_ID_A || chip_id == LTM2987_ID_B)
return ltm2987;
else if (chip_id == LTM4676_ID_REV1 || chip_id == LTM4676_ID_REV2 ||
chip_id == LTM4676A_ID)
return ltm4676;
@ -559,6 +569,8 @@ static int ltc2978_probe(struct i2c_client *client,
break;
case ltc2977:
case ltc2978:
case ltc2980:
case ltm2987:
info->read_word_data = ltc2978_read_word_data;
info->pages = LTC2978_NUM_PAGES;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
@ -634,10 +646,12 @@ static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltc2975" },
{ .compatible = "lltc,ltc2977" },
{ .compatible = "lltc,ltc2978" },
{ .compatible = "lltc,ltc2980" },
{ .compatible = "lltc,ltc3880" },
{ .compatible = "lltc,ltc3882" },
{ .compatible = "lltc,ltc3883" },
{ .compatible = "lltc,ltc3887" },
{ .compatible = "lltc,ltm2987" },
{ .compatible = "lltc,ltm4676" },
{ }
};