On Thu, Jul 21, 2022 at 03:44:31PM +0800, Xu Yilun wrote: > On Tue, Jul 19, 2022 at 02:23:33PM +0300, Ivan Bornyakov wrote: > > Add support to the FPGA manager for programming Lattice ECP5 FPGA over > > slave SPI interface with .bit formatted uncompressed bitstream image. > > I didn't have time to looking into the patches yet, but I have some quick > question. > > Where is the bitstream data writing to? To the FPGA active region or the > backup nvmem like flash? Bitstream is written to FPGA's volatile SRAM configuration memory. > > After reconfiguration, how to re-enumerate the hardware devices in the > newly programmed FPGA region? > I personally describe FPGA-based devices statically in DT overlay within fpga-region. Of course this approach is error prone to mismatch between firmware and devices described in DT overlay... > Thanks, > Yilun > > > > > ChangeLog: > > v1 -> v2: > > * remove "spi" from compatible string > > * reword description in dt-bindings doc > > * add reference to spi-peripheral-props.yaml in dt-binding doc > > * fix DTS example in dt-bindings doc: 4-spaces indentations, no > > undersores in node names. > > v2 -> v3: > > * fix typo "##size-cells" -> "#size-cells" in dt-bindings example > > v3 -> v4: > > * dt-bindings: reword description > > * dt-bindings: revert props order > > v4 -> v5: > > * dt-bindings: remove trailing dot from title > > * dt-bindings: reword description to avoid driver reference > > * dt-bindings: add "Reviewed-by: Krzysztof Kozlowski" tag > > > > Ivan Bornyakov (2): > > fpga: ecp5-spi: add Lattice ECP5 FPGA manager > > dt-bindings: fpga: add binding doc for ecp5-spi fpga mgr > > > > .../bindings/fpga/lattice,ecp5-fpga-mgr.yaml | 74 +++++ > > drivers/fpga/Kconfig | 7 + > > drivers/fpga/Makefile | 1 + > > drivers/fpga/ecp5-spi.c | 275 ++++++++++++++++++ > > 4 files changed, 357 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/fpga/lattice,ecp5-fpga-mgr.yaml > > create mode 100644 drivers/fpga/ecp5-spi.c > > > > -- > > 2.37.1 > >
