spi: stm32_qspi: use QSPI bus as 8 lines communication channel

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Merge series from patrice.chotard@foss.st.com <patrice.chotard@foss.st.com>:

The goal of this series is to allow to use QSPI bus as a 8 lines communication
channel for specific purpose.

The QSPI block offers the possibility to communicate with 2 flashes in
parrallel using the dual flash mode, 8 data lines are then used.
Usage of cs-gpios populated and spi-tx-bus-width / spi-rx-bus-width both set to 8,
is needed to enable dual flash mode.

The addition of the legacy transfer_one_message() spi callback is also needed
as currently the stm32-qspi driver only supports spi_controller_mem_ops API.

...

This commit is contained in:

Mark Brown 2022-08-23 17:59:36 +01:00

parent 52c135d495 a557fca630

commit 1a09e0e8cf

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1 changed files with 109 additions and 9 deletions

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drivers/spi/spi-stm32-qspi.c

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