diff options
| author |   Mårten Lindahl <marten.lindahl@axis.com> | 2022-04-28 16:40:36 +0200 |
|---|---|---|
| committer |   Guenter Roeck <linux@roeck-us.net> | 2022-05-20 10:57:06 -0700 |
| commit | 5de3e13f7f6b496bd7bd9ff4d2b915b7d3e67cda (patch) | |
| tree | 10bb03bb2d4f8d6c86ddff651b42150b2ba03ccd /drivers/hwmon | |
| parent | hwmon: (asus-ec-sensors) add doc entry for PRIME X470-PRO (diff) | |
| download | linux-dev-5de3e13f7f6b496bd7bd9ff4d2b915b7d3e67cda.tar.xz linux-dev-5de3e13f7f6b496bd7bd9ff4d2b915b7d3e67cda.zip | |
hwmon: (pmbus) Introduce and use write_byte_data callback
Some of the pmbus core functions uses pmbus_write_byte_data, which does
not support driver callbacks for chip specific write operations. This
could potentially influence some specific regulator chips that for
example need a time delay before each data access.
Lets add support for driver callback with _pmbus_write_byte_data.
Signed-off-by: Mårten Lindahl <marten.lindahl@axis.com>
Link: https://lore.kernel.org/r/20220428144039.2464667-2-marten.lindahl@axis.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus.h | 2 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 24 |
2 files changed, 23 insertions, 3 deletions
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index e74b6ef070f3..c031a9700ace 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -438,6 +438,8 @@ struct pmbus_driver_info { int (*read_byte_data)(struct i2c_client *client, int page, int reg); int (*read_word_data)(struct i2c_client *client, int page, int phase, int reg); + int (*write_byte_data)(struct i2c_client *client, int page, int reg, + u8 byte); int (*write_word_data)(struct i2c_client *client, int page, int reg, u16 word); int (*write_byte)(struct i2c_client *client, int page, u8 value); diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index d93574d6a1fb..e7235d526e99 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -276,6 +276,24 @@ static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg, return pmbus_write_word_data(client, page, reg, word); } +/* + * _pmbus_write_byte_data() is similar to pmbus_write_byte_data(), but checks if + * a device specific mapping function exists and calls it if necessary. + */ +static int _pmbus_write_byte_data(struct i2c_client *client, int page, int reg, u8 value) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + const struct pmbus_driver_info *info = data->info; + int status; + + if (info->write_byte_data) { + status = info->write_byte_data(client, page, reg, value); + if (status != -ENODATA) + return status; + } + return pmbus_write_byte_data(client, page, reg, value); +} + int pmbus_update_fan(struct i2c_client *client, int page, int id, u8 config, u8 mask, u16 command) { @@ -290,7 +308,7 @@ int pmbus_update_fan(struct i2c_client *client, int page, int id, to = (from & ~mask) | (config & mask); if (to != from) { - rv = pmbus_write_byte_data(client, page, + rv = _pmbus_write_byte_data(client, page, pmbus_fan_config_registers[id], to); if (rv < 0) return rv; @@ -397,7 +415,7 @@ int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, tmp = (rv & ~mask) | (value & mask); if (tmp != rv) - rv = pmbus_write_byte_data(client, page, reg, tmp); + rv = _pmbus_write_byte_data(client, page, reg, tmp); return rv; } @@ -912,7 +930,7 @@ static int pmbus_get_boolean(struct i2c_client *client, struct pmbus_boolean *b, regval = status & mask; if (regval) { - ret = pmbus_write_byte_data(client, page, reg, regval); + ret = _pmbus_write_byte_data(client, page, reg, regval); if (ret) goto unlock; } |