Re: [PATCH 1/3] fpga: Add Efinix Trion & Titanium serial SPI programming driver
From: Xu Yilun
Date: Thu Oct 17 2024 - 21:40:57 EST
On Fri, Sep 27, 2024 at 04:14:42PM +0200, iansdannapel@xxxxxxxxx wrote:
> From: Ian Dannapel <iansdannapel@xxxxxxxxx>
>
> Add a new driver for loading binary firmware to volatile
> configuration RAM using "SPI passive programming" on Efinix FPGAs.
>
> Signed-off-by: Ian Dannapel <iansdannapel@xxxxxxxxx>
> ---
> drivers/fpga/Kconfig | 10 ++
> drivers/fpga/Makefile | 1 +
> drivers/fpga/efinix-trion-spi-passive.c | 211 ++++++++++++++++++++++++
> 3 files changed, 222 insertions(+)
> create mode 100644 drivers/fpga/efinix-trion-spi-passive.c
>
> diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> index 37b35f58f0df..eb1e44c4e3e0 100644
> --- a/drivers/fpga/Kconfig
> +++ b/drivers/fpga/Kconfig
> @@ -83,6 +83,16 @@ config FPGA_MGR_XILINX_SPI
> FPGA manager driver support for Xilinx FPGA configuration
> over slave serial interface.
>
> +config FPGA_MGR_EFINIX_SPI
> + tristate "Efinix FPGA configuration over SPI passive"
> + depends on SPI
> + help
> + This option enables support for the FPGA manager driver to
> + configure Efinix Trion and Titanium Series FPGAs over SPI
> + using passive serial mode.
> + Warning: Do not activate this if there are other SPI devices
> + on the same bus as it might interfere with the transmission.
Sorry, this won't work. As you can see, the conflict usage of CS causes
several concerns. Just a text here is far from enough.
You need to actively work with SPI core/controller drivers to find a
solution that coordinate the usage of this pin.
Thanks
Yilun