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authorGuenter Roeck <linux@roeck-us.net>2015-08-17 07:21:43 -0700
committerGuenter Roeck <linux@roeck-us.net>2015-08-17 16:36:00 -0700
commit228b687d9e20f367e4d5ea8723e3abbf0892db61 (patch)
tree60b86be18f02776b10abb1cb71db3414aa25bbfa /drivers/hwmon
parent52aae6af71e0e78e25c64e13266917bb323984d5 (diff)
hwmon: (ltc2978) Add support for LTC3886
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 <mike@proclivis.com> Tested-by: Michael Jones <mike@proclivis.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/pmbus/Kconfig2
-rw-r--r--drivers/hwmon/pmbus/ltc2978.c24
2 files changed, 23 insertions, 3 deletions
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index af778aed4033..5ebc36255c88 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -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.
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index 48dcde0bc740..60fe8f9839d3 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -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" },