diff options
| author | Zhu, Richard \(NSN - CN/Beijing\) <richard.zhu@nsn.com> | 2014-07-01 03:14:23 -0400 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2014-08-04 10:01:38 -0400 |
| commit | a8bfeceb0c1400b9331c00f6969afa6cb82d5d4a (patch) | |
| tree | b0774f9e62c7af6ae14f9da24e334208e8ab2d1e /Documentation/hwmon/tps40422 | |
| parent | 012cb5e257dcce524ee6207e50ca494d8a2b6013 (diff) | |
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 @@ | |||
| 1 | Kernel driver tps40422 | ||
| 2 | ====================== | ||
| 3 | |||
| 4 | Supported chips: | ||
| 5 | * TI TPS40422 | ||
| 6 | Prefix: 'tps40422' | ||
| 7 | Addresses scanned: - | ||
| 8 | Datasheet: http://www.ti.com/lit/gpn/tps40422 | ||
| 9 | |||
| 10 | Author: Zhu Laiwen <richard.zhu@nsn.com> | ||
| 11 | |||
| 12 | |||
| 13 | Description | ||
| 14 | ----------- | ||
| 15 | |||
| 16 | This driver supports TI TPS40422 Dual-Output or Two-Phase Synchronous Buck | ||
| 17 | Controller with PMBus | ||
| 18 | |||
| 19 | The driver is a client driver to the core PMBus driver. | ||
| 20 | Please see Documentation/hwmon/pmbus for details on PMBus client drivers. | ||
| 21 | |||
| 22 | |||
| 23 | Usage Notes | ||
| 24 | ----------- | ||
| 25 | |||
| 26 | This driver does not auto-detect devices. You will have to instantiate the | ||
| 27 | devices explicitly. Please see Documentation/i2c/instantiating-devices for | ||
| 28 | details. | ||
| 29 | |||
| 30 | |||
| 31 | Platform data support | ||
| 32 | --------------------- | ||
| 33 | |||
| 34 | The driver supports standard PMBus driver platform data. | ||
| 35 | |||
| 36 | |||
| 37 | Sysfs entries | ||
| 38 | ------------- | ||
| 39 | |||
| 40 | The following attributes are supported. | ||
| 41 | |||
| 42 | in[1-2]_label "vout[1-2]" | ||
| 43 | in[1-2]_input Measured voltage. From READ_VOUT register. | ||
| 44 | in[1-2]_alarm voltage alarm. | ||
| 45 | |||
| 46 | curr[1-2]_input Measured current. From READ_IOUT register. | ||
| 47 | curr[1-2]_label "iout[1-2]" | ||
| 48 | curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register. | ||
| 49 | curr1_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. | ||
| 50 | curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT status. | ||
| 51 | curr1_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. | ||
| 52 | curr2_alarm Current high alarm. From IOUT_OC_WARNING status. | ||
| 53 | |||
| 54 | temp1_input Measured temperature. From READ_TEMPERATURE_2 register on page 0. | ||
| 55 | temp1_max Maximum temperature. From OT_WARN_LIMIT register. | ||
| 56 | temp1_crit Critical high temperature. From OT_FAULT_LIMIT register. | ||
| 57 | temp1_max_alarm Chip temperature high alarm. Set by comparing | ||
| 58 | READ_TEMPERATURE_2 on page 0 with OT_WARN_LIMIT if TEMP_OT_WARNING | ||
| 59 | status is set. | ||
| 60 | temp1_crit_alarm Chip temperature critical high alarm. Set by comparing | ||
| 61 | READ_TEMPERATURE_2 on page 0 with OT_FAULT_LIMIT if TEMP_OT_FAULT | ||
| 62 | status is set. | ||
| 63 | temp2_input Measured temperature. From READ_TEMPERATURE_2 register on page 1. | ||
| 64 | temp2_alarm Chip temperature alarm on page 1. | ||