LTC3886 is a is a dual PolyPhase DC/DC synchronous step-down switching
regulator controller. It is mostly command compatible to LTC3883,
but supports two phases instead of one.
Suggested-by: Michael Jones <mike@xxxxxxxxxxxxx>
Tested-by: Michael Jones <mike@xxxxxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
.../devicetree/bindings/hwmon/ltc2978.txt | 3 ++-
Documentation/hwmon/ltc2978 | 23 +++++++++++++--------
drivers/hwmon/pmbus/Kconfig | 2 +-
drivers/hwmon/pmbus/ltc2978.c | 24 ++++++++++++++++++++--
4 files changed, 39 insertions(+), 13 deletions(-)
diff --git a/Documentation/devicetree/bindings/hwmon/ltc2978.txt b/Documentation/devicetree/bindings/hwmon/ltc2978.txt
index 5dc2691ccf08..a7afbf60bb9c 100644
--- a/Documentation/devicetree/bindings/hwmon/ltc2978.txt
+++ b/Documentation/devicetree/bindings/hwmon/ltc2978.txt
@@ -10,6 +10,7 @@ Required properties:
* "lltc,ltc3880"
* "lltc,ltc3882"
* "lltc,ltc3883"
+ * "lltc,ltc3886"
* "lltc,ltc3887"
* "lltc,ltm2987"
* "lltc,ltm4676"
@@ -25,7 +26,7 @@ Valid names of regulators depend on number of supplies supported per device:
* ltc2974, ltc2975 : vout0 - vout3
* ltc2977, ltc2980, ltm2987 : vout0 - vout7
* ltc2978 : vout0 - vout7
- * ltc3880, ltc3882 : vout0 - vout1
+ * ltc3880, ltc3882, ltc3886 : vout0 - vout1
* ltc3883 : vout0
* ltm4676 : vout0 - vout1
diff --git a/Documentation/hwmon/ltc2978 b/Documentation/hwmon/ltc2978
index 158355398798..f997aa53eb95 100644
--- a/Documentation/hwmon/ltc2978
+++ b/Documentation/hwmon/ltc2978
@@ -35,6 +35,10 @@ Supported chips:
Prefix: 'ltc3883'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc3883
+ * Linear Technology LTC3886
+ Prefix: 'ltc3886'
+ Addresses scanned: -
+ Datasheet: http://www.linear.com/product/ltc3886
* Linear Technology LTC3887
Prefix: 'ltc3887'
Addresses scanned: -
@@ -60,8 +64,8 @@ LTC2977 is a pin compatible replacement for LTC2978.
LTC2980 is a 16-channel Power System Manager, consisting of two LTC2977
in a single die. The chip is instantiated and reported as two separate chips
on two different I2C bus addresses.
-LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC
-controllers.
+LTC3880, LTC3882, LTC3886, and LTC3887 are dual output poly-phase step-down
+DC/DC controllers.
LTC3883 is a single phase step-down DC/DC controller.
LTM2987 is a 16-channel Power System Manager with two LTC2977 plus
additional components on a single die. The chip is instantiated and reported
@@ -113,7 +117,7 @@ in[N]_label "vout[1-8]".
LTC2974, LTC2975: N=2-5
LTC2977, LTC2980, LTM2987: N=2-9
LTC2978: N=2-9
- LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
+ LTC3880, LTC3882, LTC23886 LTC3887, LTM4676: N=2-3
LTC3883: N=2
in[N]_input Measured output voltage.
in[N]_min Minimum output voltage.
@@ -161,29 +165,30 @@ temp[N]_highest Highest measured temperature. Not supported for chip
temp[N]_reset_history Reset temperature history. Not supported for chip
temperature sensor on LTC2974 and LTC2975.
-power1_label "pin". LTC3883 only.
+power1_label "pin". LTC3883 and LTC3886 only.
power1_input Measured input power.
power[N]_label "pout[1-4]".
LTC2974, LTC2975: N=1-4
LTC2977, LTC2980, LTM2987: Not supported
LTC2978: Not supported
- LTC3880, LTC3882, LTC3887, LTM4676: N=1-2
+ LTC3880, LTC3882, LTC3886, LTC3887, LTM4676: N=1-2
LTC3883: N=2
power[N]_input Measured output power.
-curr1_label "iin". LTC3880, LTC3883, LTC3887, and LTM4676 only.
+curr1_label "iin". LTC3880, LTC3883, LTC3886, LTC3887, and LTM4676
+ only.
curr1_input Measured input current.
curr1_max Maximum input current.
curr1_max_alarm Input current high alarm.
-curr1_highest Highest input current. LTC3883 only.
-curr1_reset_history Reset input current history. LTC3883 only.
+curr1_highest Highest input current. LTC3883 and LTC3886 only.
+curr1_reset_history Reset input current history. LTC3883 and LTC3886 only.
curr[N]_label "iout[1-4]".
LTC2974, LTC2975: N=1-4
LTC2977, LTC2980, LTM2987: not supported
LTC2978: not supported
- LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
+ LTC3880, LTC3882, LTC3886, 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 af778aed4033..5ebc36255c88 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, LTC3887, LTCM2987, and LTM4676.
+ LTC3883, LTC3886, LTC3887, LTCM2987, 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 f0b1c99ed39b..24d0ee4de08c 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -25,7 +25,7 @@
#include "pmbus.h"
enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
- ltc3883, ltc3887, ltm2987, ltm4676 };
+ ltc3883, ltc3886, ltc3887, ltm2987, ltm4676 };
/* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd
@@ -47,7 +47,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
#define LTC3880_MFR_CLEAR_PEAKS 0xe3
#define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4
-/* LTC3883 only */
+/* LTC3883 and LTC3886 only */
#define LTC3883_MFR_IIN_PEAK 0xe1
/* LTC2975 only */
@@ -69,6 +69,7 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
#define LTC3882_ID 0x4200
#define LTC3882_ID_D1 0x4240 /* Dash 1 */
#define LTC3883_ID 0x4300
+#define LTC3886_ID 0x4600
#define LTC3887_ID 0x4700
#define LTM2987_ID_A 0x8010 /* A/B for two die IDs */
#define LTM2987_ID_B 0x8020
@@ -417,6 +418,7 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc3880", ltc3880},
{"ltc3882", ltc3882},
{"ltc3883", ltc3883},
+ {"ltc3886", ltc3886},
{"ltc3887", ltc3887},
{"ltm2987", ltm2987},
{"ltm4676", ltm4676},
@@ -485,6 +487,8 @@ static int ltc2978_get_id(struct i2c_client *client)
return ltc3882;
else if (chip_id == LTC3883_ID)
return ltc3883;
+ else if (chip_id == LTC3886_ID)
+ return ltc3886;
else if (chip_id == LTC3887_ID)
return ltc3887;
else if (chip_id == LTM2987_ID_A || LTM2987_ID_B)
@@ -624,6 +628,21 @@ static int ltc2978_probe(struct i2c_client *client,
| PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
| PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP;
break;
+ case ltc3886:
+ data->features |= FEAT_CLEAR_PEAKS;
+ info->read_word_data = ltc3883_read_word_data;
+ info->pages = LTC3880_NUM_PAGES;
+ info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
+ | PMBUS_HAVE_STATUS_INPUT
+ | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
+ | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
+ | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
+ | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP;
+ info->func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
+ | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
+ | PMBUS_HAVE_POUT
+ | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
+ break;
default:
return -ENODEV;
}
@@ -650,6 +669,7 @@ static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltc3880" },
{ .compatible = "lltc,ltc3882" },
{ .compatible = "lltc,ltc3883" },
+ { .compatible = "lltc,ltc3886" },
{ .compatible = "lltc,ltc3887" },
{ .compatible = "lltc,ltm2987" },
{ .compatible = "lltc,ltm4676" },
--
2.1.4
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