From 15398566f0ea95c66d202b8705dba4f59b9ba01c Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Fri, 7 Aug 2015 09:06:37 -0700 Subject: [PATCH] hwmon: (ltc2978) Add support for LTC3887 LTC3887 is an enhanced version of LTC3880 and supports the same commands. Signed-off-by: Guenter Roeck --- .../devicetree/bindings/hwmon/ltc2978.txt | 1 + Documentation/hwmon/ltc2978 | 19 ++++++++++++------- drivers/hwmon/pmbus/Kconfig | 3 ++- drivers/hwmon/pmbus/ltc2978.c | 19 ++++++++++++++----- 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 #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" }, { } }; -- 2.30.2