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hwmon: (pmbus) Add 'phase' parameter where needed for multi-phase support

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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>
This commit is contained in:
Guenter Roeck
2020-01-14 09:49:27 -08:00
parent a1dd176c42
commit 43f33b6e59
19 changed files with 192 additions and 124 deletions
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22
Documentation/hwmon/pmbus-core.rst
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@@ -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.
::