On Mon, 20 Dec 2021 19:29:24 +0900, Rob Landley wrote: > > On 12/19/21 4:53 AM, Geert Uytterhoeven wrote: > >> By the way, did you ever figure out how to get the first serial port to work on > >> qemu so qemu-system-sh4 doesn't have to "-serial null -serial mon:stdio" to get > >> a serial console? > > > > Nope, same as last time you asked ;-) > > Well it had been a couple years, you never know... > > > However, upon a fresh look at linux/arch/sh/boards/mach-r2d/setup.c, > > I noticed something I missed before: the SCI port is not available > > as a UART, as it is used to talk SPI to an RTC. Yes. R2D plus serial port connected SuperI/O UART. It not cpu on-chip SCI. It is not possible to check SCI with the standard version of qemu-system-sh4. There is SCI emulation, so you can change it to connect to the qemu serial port. > /* Single Epson RTC-9701JE attached on CS0 */ > > Huh. That does explain the CONFIG_RTC_DRV_R9701=y in rts7751r2d*_defconfig. > (And also SPI SPI_SH_SCI MFD_SM501 RTC_CLASS and RTC_DRV_SH RTC_HCTOSYS which > I've never gotten connected to QEMU.) SPI_SH_SCI using SCI pin like GPIO. qemu-system-sh4 is not support this. > > So that means qemu > > has the hardware description wrong? > > It would be nice if qemu-system-sh4 grew an RTC. Looks like Sato-san and Magnus > Damm are the qemu-system-sh4 maintainers? (cc'd) > > Thanks, > > Rob -- Yosinori Sato
