On Thu, 14 Jan 2021, at 23:46, Chia-Wei, Wang wrote: > The LPC controller has no concept of the BMC and the Host partitions. > > A concrete instance is that the HICRB[5:4] are for the I/O port address > configurtaion of KCS channel 1/2. However, the KCS driver cannot access > HICRB for channel 1/2 initialization via syscon regmap interface due to > the parition boundary. (i.e. offset 80h) > > In addition, for the HW design backward compatibility, a newly added HW > control bit could be located at any reserved one over the LPC addressing > space. Thereby, this patch removes the lpc-bmc and lpc-host child node > and thus the LPC partitioning. > > Note that this change requires the synchronization between device tree > change and the driver change. To prevent the misuse of old devicetrees > with new drivers, or vice versa, the v2 compatible strings are adopted > for the LPC device as listed: > > "aspeed,ast2400-lpc-v2" > "aspeed,ast2500-lpc-v2" > "aspeed,ast2600-lpc-v2" > > Signed-off-by: Chia-Wei, Wang <chiawei_wang@xxxxxxxxxxxxxx> Reviewed-by: Andrew Jeffery <andrew@xxxxxxxx>
