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: Guenter Roeck <linux@roeck-us.net>

2 files changed, 9 insertions, 3 deletions

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 5ebc36255c88..df6ebb2b8f0f 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, 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.
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index f1c69c9de849..58b789c28b48 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -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" },
         { }
 };