hwmon: (ltc2978) Add support for LTC3887

[firefly-linux-kernel-4.4.55.git] / drivers / hwmon / pmbus / ltc2978.c

diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index acbfe3ec2ffd771be6f1ad8cab2433a510d78438..0756d8ae9dad907bc7e2e9747c393899d3dd22e4 100644 (file)
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -1,6 +1,6 @@
 /*
  * Hardware monitoring driver for LTC2974, LTC2977, LTC2978, LTC3880,
- * LTC3883, and LTM4676
+ * LTC3883, LTC3887. and LTM4676
  *
  * Copyright (c) 2011 Ericsson AB.
  * Copyright (c) 2013, 2014 Guenter Roeck
@@ -25,7 +25,8 @@
 #include <linux/regulator/driver.h>
 #include "pmbus.h"
 
-enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 };
+enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltc3887,
+            ltm4676 };
 
 /* Common for all chips */
 #define LTC2978_MFR_VOUT_PEAK          0xdd
@@ -42,7 +43,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 };
 #define LTC2974_MFR_IOUT_PEAK          0xd7
 #define LTC2974_MFR_IOUT_MIN           0xd8
 
-/* LTC3880, LTC3882, LTC3883, and LTM4676 */
+/* LTC3880, LTC3882, LTC3883, LTC3887, and LTM4676 */
 #define LTC3880_MFR_IOUT_PEAK          0xd7
 #define LTC3880_MFR_CLEAR_PEAKS                0xe3
 #define LTC3880_MFR_TEMPERATURE2_PEAK  0xf4
@@ -60,9 +61,11 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 };
 #define LTC3880_ID_MASK                        0xff00
 #define LTC3883_ID                     0x4300
 #define LTC3883_ID_MASK                        0xff00
+#define LTC3887_ID                     0x4700
+#define LTC3887_ID_MASK                        0xff00
 #define LTM4676_ID                     0x4400
 #define LTM4676_ID_2                   0x4480
-#define LTM4676A_ID                    0x47E0
+#define LTM4676A_ID                    0x47e0
 #define LTM4676_ID_MASK                        0xfff0
 
 #define LTC2974_NUM_PAGES              4
@@ -315,7 +318,8 @@ static int ltc2978_clear_peaks(struct i2c_client *client, int page,
 {
        int ret;
 
-       if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltm4676)
+       if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltc3887 ||
+           id == ltm4676)
                ret = pmbus_write_byte(client, 0, LTC3880_MFR_CLEAR_PEAKS);
        else
                ret = pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
@@ -373,6 +377,7 @@ static const struct i2c_device_id ltc2978_id[] = {
        {"ltc3880", ltc3880},
        {"ltc3882", ltc3882},
        {"ltc3883", ltc3883},
+       {"ltc3887", ltc3887},
        {"ltm4676", ltm4676},
        {}
 };
@@ -432,6 +437,8 @@ static int ltc2978_get_id(struct i2c_client *client)
                return ltc3880;
        else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID)
                return ltc3883;
+       else if ((chip_id & LTC3887_ID_MASK) == LTC3887_ID)
+               return ltc3887;
        else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID ||
                 (chip_id & LTM4676_ID_MASK) == LTM4676_ID_2 ||
                 (chip_id & LTM4676_ID_MASK) == LTM4676A_ID)
@@ -511,6 +518,7 @@ static int ltc2978_probe(struct i2c_client *client,
                }
                break;
        case ltc3880:
+       case ltc3887:
        case ltm4676:
                info->read_word_data = ltc3880_read_word_data;
                info->pages = LTC3880_NUM_PAGES;
@@ -573,6 +581,7 @@ static const struct of_device_id ltc2978_of_match[] = {
        { .compatible = "lltc,ltc3880" },
        { .compatible = "lltc,ltc3882" },
        { .compatible = "lltc,ltc3883" },
+       { .compatible = "lltc,ltc3887" },
        { .compatible = "lltc,ltm4676" },
        { }
 };