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| author | Adam Wujek <dev_public@wujek.eu> | 2022-06-01 01:33:03 +0000 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2022-07-13 08:38:19 -0700 |
| commit | 8a85007c8386ed8378ed3ee9f53e995e3c45fa1c (patch) | |
| tree | 599153b78b95a2fe45aa44780b8a63961150c3dc /drivers/hwmon | |
| parent | bae26b801f98bc902ab4a43c96947f3a0ce4f3a0 (diff) | |
| download | linux-8a85007c8386ed8378ed3ee9f53e995e3c45fa1c.tar.gz linux-8a85007c8386ed8378ed3ee9f53e995e3c45fa1c.tar.bz2 linux-8a85007c8386ed8378ed3ee9f53e995e3c45fa1c.zip | |
hwmon: (pmbus) add a function to check the presence of a block register
Other functions (like pmbus_check_byte_register) cannot be used to check
the presence of a block register, because it will generate error when PEC
is used.
Signed-off-by: Adam Wujek <dev_public@wujek.eu>
Link: https://lore.kernel.org/r/20220601013232.801133-1-dev_public@wujek.eu
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index bb21f1e79289..156d22ad2ad0 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -441,6 +441,18 @@ int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, } EXPORT_SYMBOL_NS_GPL(pmbus_update_byte_data, PMBUS); +static int pmbus_read_block_data(struct i2c_client *client, int page, u8 reg, + char *data_buf) +{ + int rv; + + rv = pmbus_set_page(client, page, 0xff); + if (rv < 0) + return rv; + + return i2c_smbus_read_block_data(client, reg, data_buf); +} + static struct pmbus_sensor *pmbus_find_sensor(struct pmbus_data *data, int page, int reg) { @@ -578,6 +590,22 @@ bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) } EXPORT_SYMBOL_NS_GPL(pmbus_check_word_register, PMBUS); +static bool pmbus_check_block_register(struct i2c_client *client, int page, + int reg) +{ + int rv; + struct pmbus_data *data = i2c_get_clientdata(client); + char data_buf[I2C_SMBUS_BLOCK_MAX + 2]; + + rv = pmbus_read_block_data(client, page, reg, data_buf); + if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) + rv = pmbus_check_status_cml(client); + if (rv < 0 && (data->flags & PMBUS_READ_STATUS_AFTER_FAILED_CHECK)) + data->read_status(client, -1); + pmbus_clear_fault_page(client, -1); + return rv >= 0; +} + const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) { struct pmbus_data *data = i2c_get_clientdata(client); |