Hi Jacopo, On Thursday, January 12, 2017, jacopo mondi wrote: > To read the pin direction I would need to add one more register to the > "reg" property range provided in the DTS. > This is of course doable, but I would have two questions here: > - why did you chose to use PMSR register instead of reading/writing > directly to PM? Am I missing something?
I guess you can still use the PMSR register to get the current direction of the I/O pin. According to the HW manual: "When reading, the higher 16 bits are read as 0000H. The lower 16 bits are read as the value of the PMn register." While the PMSR register is a cool idea of having a special register that can change a single port pin direction without doing a read-modify-write by the CPU, it doesn't seem to be a standard option in Renesas SoCs (well, except for the older NEC V850 parts where this PFC HW came from). So a more traditional method of just using the Pmn register seems to be more compatible across Renesas SoCs. Chris
