On Fri, Oct 18, 2024 at 11:45:27AM +0800, carlos.song@xxxxxxx wrote: > From: Carlos Song <carlos.song@xxxxxxx> > > Now there is no alias for LPSPI on I.MX8ULP/8QXP/8QM/8DXL/93. > So spidevB.C index B will be automatically allocated by kernel > incrementally from zero according to the order of registering > spi controller. In this case, it is hard to determine spidevB.C > is spi interface of device C on which LPSPI bus. It will cause > confusion when operate spi devices in userspace. > > For example, in I.MX93, When LPSPI3 and LPSPI5 are enabled > without alais: > > :~# ls /dev/spidev* > /dev/spidev0.0 /dev/spidev1.0 > > After LPSPI alais is applied, fixedly B is the LPSPI index and > C is the spi device index in spidevB.C. They are the pleasant > spidev names. Directly spidev2.0 is the device0 at LPSPI3 bus > and spidev4.0 is the device0 at LPSPI5 bus: > > :~# ls /dev/spidev* > /dev/spidev2.0 /dev/spidev4.0 > > Signed-off-by: Carlos Song <carlos.song@xxxxxxx> > Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx> > > Carlos Song (5): > arm64: dts: imx8qxp: Add LPSPI alias > arm64: dts: imx8qm: Add LPSPI alias > arm64: dts: imx8dxl: Add LPSPI alias > arm64: dts: imx8ulp: Add LPSPI alias > arm64: dts: imx93: Add LPSPI alias Applied all, thanks!
