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| author |   Guenter Roeck <linux@roeck-us.net> | 2020-01-14 09:49:27 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2020-03-08 20:35:47 -0700 |
| commit | 43f33b6e59c229ca82df4f56154d50fbea3ecc80 (patch) | |
| tree | a4c57d8cbe97047835d55a8e50afd809a1ba3f4f /Documentation/hwmon | |
| parent | hwmon: (pmbus) Add IC_DEVICE_ID and IC_DEVICE_REV command definitions (diff) | |
| download | wireguard-linux-43f33b6e59c229ca82df4f56154d50fbea3ecc80.tar.xz wireguard-linux-43f33b6e59c229ca82df4f56154d50fbea3ecc80.zip | |
hwmon: (pmbus) Add 'phase' parameter where needed for multi-phase support
In preparation for multi-phase support, add 'phase' parameter to read_word
and set_page functions. Actual multi-phase support will be added in
a subsequent patch.
Cc: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/pmbus-core.rst | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/Documentation/hwmon/pmbus-core.rst b/Documentation/hwmon/pmbus-core.rst index 92515c446fe3..501b37b0610d 100644 --- a/Documentation/hwmon/pmbus-core.rst +++ b/Documentation/hwmon/pmbus-core.rst @@ -162,9 +162,12 @@ Read byte from page <page>, register <reg>. :: - int (*read_word_data)(struct i2c_client *client, int page, int reg); + int (*read_word_data)(struct i2c_client *client, int page, int phase, + int reg); -Read word from page <page>, register <reg>. +Read word from page <page>, phase <pase>, register <reg>. If the chip does not +support multiple phases, the phase parameter can be ignored. If the chip +supports multiple phases, a phase value of 0xff indicates all phases. :: @@ -201,16 +204,21 @@ is mandatory. :: - int pmbus_set_page(struct i2c_client *client, u8 page); + int pmbus_set_page(struct i2c_client *client, u8 page, u8 phase); -Set PMBus page register to <page> for subsequent commands. +Set PMBus page register to <page> and <phase> for subsequent commands. +If the chip does not support multiple phases, the phase parameter is +ignored. Otherwise, a phase value of 0xff selects all phases. :: - int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg); + int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 phase, + u8 reg); -Read word data from <page>, <reg>. Similar to i2c_smbus_read_word_data(), but -selects page first. +Read word data from <page>, <phase>, <reg>. Similar to +i2c_smbus_read_word_data(), but selects page and phase first. If the chip does +not support multiple phases, the phase parameter is ignored. Otherwise, a phase +value of 0xff selects all phases. :: |