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| author | Zhu, Richard \(NSN - CN/Beijing\) <richard.zhu@nsn.com> | 2014-07-01 07:14:23 +0000 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2014-08-04 07:01:38 -0700 |
| commit | a8bfeceb0c1400b9331c00f6969afa6cb82d5d4a (patch) | |
| tree | b0774f9e62c7af6ae14f9da24e334208e8ab2d1e /Documentation/hwmon/tps40422 | |
| parent | 012cb5e257dcce524ee6207e50ca494d8a2b6013 (diff) | |
| download | talos-obmc-linux-a8bfeceb0c1400b9331c00f6969afa6cb82d5d4a.tar.gz talos-obmc-linux-a8bfeceb0c1400b9331c00f6969afa6cb82d5d4a.zip | |
hwmon: (pmbus) Add tps40422 front-end driver
For TI power management chip TPS40422, READ_TEMPERATURE_2 command is supported on
page 1 of the chip, but the original driver(pmbus.c) only tried to detect this command
on page 0, this will lead to a result that the temperature sensor in page 1 couldn't
be detected. This change is to isolate the tps40422 driver from pmbus.c into a solo
front-end driver.
Signed-off-by: Zhu Laiwen <richard.zhu@nsn.com>
[Guenter Roeck: Dropped unnecessary license text (fixes checkpatch warning)]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/tps40422')
| -rw-r--r-- | Documentation/hwmon/tps40422 | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/hwmon/tps40422 b/Documentation/hwmon/tps40422 new file mode 100644 index 000000000000..24bb0688d515 --- /dev/null +++ b/Documentation/hwmon/tps40422 @@ -0,0 +1,64 @@ +Kernel driver tps40422 +====================== + +Supported chips: + * TI TPS40422 + Prefix: 'tps40422' + Addresses scanned: - + Datasheet: http://www.ti.com/lit/gpn/tps40422 + +Author: Zhu Laiwen <richard.zhu@nsn.com> + + +Description +----------- + +This driver supports TI TPS40422 Dual-Output or Two-Phase Synchronous Buck +Controller with PMBus + +The driver is a client driver to the core PMBus driver. +Please see Documentation/hwmon/pmbus for details on PMBus client drivers. + + +Usage Notes +----------- + +This driver does not auto-detect devices. You will have to instantiate the +devices explicitly. Please see Documentation/i2c/instantiating-devices for +details. + + +Platform data support +--------------------- + +The driver supports standard PMBus driver platform data. + + +Sysfs entries +------------- + +The following attributes are supported. + +in[1-2]_label "vout[1-2]" +in[1-2]_input Measured voltage. From READ_VOUT register. +in[1-2]_alarm voltage alarm. + +curr[1-2]_input Measured current. From READ_IOUT register. +curr[1-2]_label "iout[1-2]" +curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register. +curr1_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. +curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT status. +curr1_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. +curr2_alarm Current high alarm. From IOUT_OC_WARNING status. + +temp1_input Measured temperature. From READ_TEMPERATURE_2 register on page 0. +temp1_max Maximum temperature. From OT_WARN_LIMIT register. +temp1_crit Critical high temperature. From OT_FAULT_LIMIT register. +temp1_max_alarm Chip temperature high alarm. Set by comparing + READ_TEMPERATURE_2 on page 0 with OT_WARN_LIMIT if TEMP_OT_WARNING + status is set. +temp1_crit_alarm Chip temperature critical high alarm. Set by comparing + READ_TEMPERATURE_2 on page 0 with OT_FAULT_LIMIT if TEMP_OT_FAULT + status is set. +temp2_input Measured temperature. From READ_TEMPERATURE_2 register on page 1. +temp2_alarm Chip temperature alarm on page 1. |
