Hi Geert,
On Monday, August 06, 2018 1, Geert Uytterhoeven wrote:
> > I had a simple patch to add support for CONFIG_DEBUG_LL for RZ/A2
> > because earlycon never worked because of RZ/A2's different register
> locations.
>
> Yeah, sci_probe_regmap() assumed the wrong regtype for your TYPE_SCIF
> port. You needed an OF_EARLYCON_DECLARE() line that also filled in
> the correct regtype.
I gave your patch a try.
When earlycon is enabled, on RZ/A2, it gets stuck in here:
static void sci_poll_put_char(struct uart_port *port, unsigned char c)
{
unsigned short status;
do {
status = serial_port_in(port, SCxSR);
} while (!(status & SCxSR_TDxE(port)));
serial_port_out(port, SCxTDR, c);
sci_clear_SCxSR(port, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
}
I see that you added this:
OF_EARLYCON_DECLARE(scif, "renesas,scif-r7s9210", rza2_early_console_setup);
and "renesas,scif-r7s9210" matches what I have in my .dtsi.
But, when I run the code, I end up in function scif_early_console_setup,
not rza2_early_console_setup
I'm assuming I'm just supposed to use this on my bootargs:
earlycon=scif,0xE8009000
Chris
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