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authorGuenter Roeck <linux@roeck-us.net>2015-08-07 09:06:37 -0700
committerGuenter Roeck <linux@roeck-us.net>2015-08-12 12:29:36 -0700
commit15398566f0ea95c66d202b8705dba4f59b9ba01c (patch)
tree94d15f6856498cde8a80e1b9795faa7934be3e56 /drivers/hwmon/pmbus/ltc2978.c
parenthwmon: (ltc2978) Add additional chip IDs for LTM4676 and LTM4676A (diff)
downloadlinux-dev-15398566f0ea95c66d202b8705dba4f59b9ba01c.tar.xz
linux-dev-15398566f0ea95c66d202b8705dba4f59b9ba01c.zip
hwmon: (ltc2978) Add support for LTC3887
LTC3887 is an enhanced version of LTC3880 and supports the same commands. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/pmbus/ltc2978.c')
-rw-r--r--drivers/hwmon/pmbus/ltc2978.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index acbfe3ec2ffd..0756d8ae9dad 100644
--- 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" },
{ }
};