Messages in this thread | | | From | <> | Subject | [PATCH v3 0/2] spi: stm32_qspi: use QSPI bus as 8 lines communication channel | Date | Tue, 16 Aug 2022 18:13:42 +0200 |
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From: Patrice Chotard <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.
Patrice Chotard (2): ARM: dts: stm32: Create separate pinmux for qspi cs pin in stm32mp15-pinctrl.dtsi spi: stm32_qspi: Add transfer_one_message() spi callback
arch/arm/boot/dts/stm32mp15-pinctrl.dtsi | 50 ++++++--- arch/arm/boot/dts/stm32mp157c-ev1.dts | 12 ++- drivers/spi/spi-stm32-qspi.c | 125 +++++++++++++++++++++-- 3 files changed, 159 insertions(+), 28 deletions(-)
-- 2.25.1
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