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-rw-r--r--Documentation/devicetree/bindings/hwmon/ltc2978.txt1
-rw-r--r--Documentation/hwmon/ltc297819
-rw-r--r--drivers/hwmon/pmbus/Kconfig3
-rw-r--r--drivers/hwmon/pmbus/ltc2978.c19
4 files changed, 29 insertions, 13 deletions
diff --git a/Documentation/devicetree/bindings/hwmon/ltc2978.txt b/Documentation/devicetree/bindings/hwmon/ltc2978.txt
index 230389f6c984..c1d23c14ddd9 100644
--- a/Documentation/devicetree/bindings/hwmon/ltc2978.txt
+++ b/Documentation/devicetree/bindings/hwmon/ltc2978.txt
@@ -8,6 +8,7 @@ Required properties:
* "lltc,ltc3880"
* "lltc,ltc3882"
* "lltc,ltc3883"
+ * "lltc,ltc3887"
* "lltc,ltm4676"
- reg: I2C slave address
diff --git a/Documentation/hwmon/ltc2978 b/Documentation/hwmon/ltc2978
index 521ee8a1135c..ff130997f22e 100644
--- a/Documentation/hwmon/ltc2978
+++ b/Documentation/hwmon/ltc2978
@@ -27,6 +27,10 @@ Supported chips:
Prefix: 'ltc3883'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc3883
+ * Linear Technology LTC3887
+ Prefix: 'ltc3887'
+ Addresses scanned: -
+ Datasheet: http://www.linear.com/product/ltc3887
* Linear Technology LTM4676
Prefix: 'ltm4676'
Addresses scanned: -
@@ -41,7 +45,8 @@ Description
LTC2974 is a quad digital power supply managers.
LTC2978 is an octal power supply monitor.
LTC2977 is a pin compatible replacement for LTC2978.
-LTC3880 and LTC3882 are dual output poly-phase step-down DC/DC controllers.
+LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC
+controllers.
LTC3883 is a single phase step-down DC/DC controller.
LTM4676 is a dual 13A or single 26A uModule regulator.
@@ -85,7 +90,7 @@ in[N]_label "vout[1-8]".
LTC2974: N=2-5
LTC2977: N=2-9
LTC2978: N=2-9
- LTC3880, LTC3882, LTM4676: N=2-3
+ LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
LTC3883: N=2
in[N]_input Measured output voltage.
in[N]_min Minimum output voltage.
@@ -105,8 +110,8 @@ temp[N]_input Measured temperature.
and temp5 reports the chip temperature.
On LTC2977 and LTC2978, only one temperature measurement
is supported and reports the chip temperature.
- On LTC3880, LTC3882, and LTM4676, temp1 and temp2
- report external temperatures, and temp3 reports
+ On LTC3880, LTC3882, LTC3887, and LTM4676, temp1 and
+ temp2 report external temperatures, and temp3 reports
the chip temperature.
On LTC3883, temp1 reports an external temperature,
and temp2 reports the chip temperature.
@@ -134,11 +139,11 @@ power[N]_label "pout[1-4]".
LTC2974: N=1-4
LTC2977: Not supported
LTC2978: Not supported
- LTC3880, LTC3882, LTM4676: N=1-2
+ LTC3880, LTC3882, LTC3887, LTM4676: N=1-2
LTC3883: N=2
power[N]_input Measured output power.
-curr1_label "iin". LTC3880, LTC3883, and LTM4676 only.
+curr1_label "iin". LTC3880, LTC3883, LTC3887, and LTM4676 only.
curr1_input Measured input current.
curr1_max Maximum input current.
curr1_max_alarm Input current high alarm.
@@ -149,7 +154,7 @@ curr[N]_label "iout[1-4]".
LTC2974: N=1-4
LTC2977: not supported
LTC2978: not supported
- LTC3880, LTC3882, LTM4676: N=2-3
+ LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
LTC3883: N=2
curr[N]_input Measured output current.
curr[N]_max Maximum output current.
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 2b3242cc7779..43b6de900ce5 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -52,7 +52,8 @@ config SENSORS_LTC2978
default n
help
If you say yes here you get hardware monitoring support for Linear
- Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, and LTM4676.
+ Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, LTC3887,
+ 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 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" },
{ }
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.