drivers: smbus: stm32: add support for pcall api #97188
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In the case that SMBus hardware does not automatically perform packet error checking (PEC), provide generic inline functions in `zephyr/drivers/smbus.h` that can be used by drivers to perform PEC in software. Signed-off-by: Chris Friedt <[email protected]> Signed-off-by: Andrew Lewycky <[email protected]>
Add tests for SMBus packet error correction (PEC). The two primary utilities tested are * smbus_pec(): compute the PEC byte for a Block Write * smbus_read_check_pec(): verify a PEC after * Read Byte * Read Word * Block Read Signed-off-by: Chris Friedt <[email protected]>
Add support for SMBus packet error checking (PEC) to the stm32 driver. This feature allows SMBust communication to be slightly more robust in the presence of noise, in that packet errors can be detected on the receive side. Signed-off-by: Andrew Lewycky <[email protected]> Signed-off-by: Chris Friedt <[email protected]>
Add SMBus Process Call API for STM32. The Process Call API is very useful, as it sends a command (a 16-bit word split over two data bytes) to the target, and then waits for the target to return a result (similarly a 16-bit word) dependent on the command. This implementation also supports PEC mode (packet error checking) and is dependent on PEC support already being supported in-tree. Signed-off-by: James Growden <[email protected]> Signed-off-by: Chris Friedt <[email protected]>
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etienne-lms
reviewed
Oct 8, 2025
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Add SMBus Process Call API for STM32.
The Process Call API is very useful, as it sends a command (a 16-bit word split over two data bytes) to the target, and then waits for the target to return a result (similarly a 16-bit word) dependent on the command.
This implementation also supports PEC mode (packet error checking) and is dependent on PEC support already being supported in-tree.
For more details, please see Section 6.5.6 of the SMBus 3.1 Specification.
https://smbus.org/specs/SMBus_3_1_20180319.pdf
This change should only be merged after #96691