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authorGuenter Roeck <linux@roeck-us.net>2014-03-05 21:23:01 -0800
committerGuenter Roeck <linux@roeck-us.net>2014-03-19 18:59:40 -0700
commitf76992b00a4111fc4679b0b2d49fe75f05c2b04d (patch)
treedd188d5108dfee2f8f525833bb359b8d9b8b1c8c /drivers/hwmon/pmbus
parenta2e151074366487dcde943fdc08d88acfe476f9d (diff)
hwmon: (pmbus/ltc2978) Add support for LTM4676
The chip's programming interface is quite similar to LTC3880 and supports the same set of sensors. Reviewed-by: Robert Coulson <rob.coulson@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/pmbus')
-rw-r--r--drivers/hwmon/pmbus/ltc2978.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index 629bfe0fe90a..e24ed521051a 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -1,9 +1,9 @@
/*
* Hardware monitoring driver for LTC2974, LTC2977, LTC2978, LTC3880,
- * and LTC3883
+ * LTC3883, and LTM4676
*
* Copyright (c) 2011 Ericsson AB.
- * Copyright (c) 2013 Guenter Roeck
+ * Copyright (c) 2013, 2014 Guenter Roeck
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -14,10 +14,6 @@
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
@@ -28,7 +24,7 @@
#include <linux/i2c.h>
#include "pmbus.h"
-enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
+enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 };
/* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd
@@ -45,7 +41,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
#define LTC2974_MFR_IOUT_PEAK 0xd7
#define LTC2974_MFR_IOUT_MIN 0xd8
-/* LTC3880 and LTC3883 */
+/* LTC3880, LTC3883, and LTM4676 */
#define LTC3880_MFR_IOUT_PEAK 0xd7
#define LTC3880_MFR_CLEAR_PEAKS 0xe3
#define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4
@@ -63,6 +59,8 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
#define LTC3880_ID_MASK 0xff00
#define LTC3883_ID 0x4300
#define LTC3883_ID_MASK 0xff00
+#define LTM4676_ID 0x4480 /* datasheet claims 0x440X */
+#define LTM4676_ID_MASK 0xfff0
#define LTC2974_NUM_PAGES 4
#define LTC2978_NUM_PAGES 8
@@ -371,6 +369,7 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc2978", ltc2978},
{"ltc3880", ltc3880},
{"ltc3883", ltc3883},
+ {"ltm4676", ltm4676},
{}
};
MODULE_DEVICE_TABLE(i2c, ltc2978_id);
@@ -406,6 +405,8 @@ static int ltc2978_probe(struct i2c_client *client,
data->id = ltc3880;
} else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID) {
data->id = ltc3883;
+ } else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID) {
+ data->id = ltm4676;
} else {
dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
return -ENODEV;
@@ -459,6 +460,7 @@ static int ltc2978_probe(struct i2c_client *client,
}
break;
case ltc3880:
+ case ltm4676:
info->read_word_data = ltc3880_read_word_data;
info->pages = LTC3880_NUM_PAGES;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
@@ -501,5 +503,5 @@ static struct i2c_driver ltc2978_driver = {
module_i2c_driver(ltc2978_driver);
MODULE_AUTHOR("Guenter Roeck");
-MODULE_DESCRIPTION("PMBus driver for LTC2974, LTC2978, LTC3880, and LTC3883");
+MODULE_DESCRIPTION("PMBus driver for LTC2974, LTC2978, LTC3880, LTC3883, and LTM4676");
MODULE_LICENSE("GPL");