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authorGuenter Roeck <linux@roeck-us.net>2015-08-17 06:38:01 -0700
committerGuenter Roeck <linux@roeck-us.net>2015-08-17 16:35:59 -0700
commit52aae6af71e0e78e25c64e13266917bb323984d5 (patch)
treeb70c2d44f6e107da40f58b1f2352658ad9261079 /drivers/hwmon
parentacb092cdf9a285fd4706bc6ffd5f99840d53bba5 (diff)
downloadblackbird-op-linux-52aae6af71e0e78e25c64e13266917bb323984d5.tar.gz
blackbird-op-linux-52aae6af71e0e78e25c64e13266917bb323984d5.zip
hwmon: (ltc2978) Add support for LTC2980 and LTM2987
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 <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/Kconfig4
-rw-r--r--drivers/hwmon/pmbus/ltc2978.c20
2 files changed, 19 insertions, 5 deletions
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 8279727987cb..af778aed4033 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -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.
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index e9d3f828fe46..48dcde0bc740 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -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" },
{ }
};
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