On Tue, Nov 17, 2020 at 10:04 AM Geert Uytterhoeven
<geert+renesas@xxxxxxxxx> wrote:
> This patch series adds support for MSIOF on R-Car V3U.
>
> I tested it on Falcon, with MSIOF1 TXD/RXD loopback (connect pins 5/6 of
> CN5), CONFIG_SPI_LOOPBACK_TEST, loopback=1, and the following appended
> to arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts:
>
> &msiof1 {
> #address-cells = <1>;
> #size-cells = <0>;
> status = "okay";
>
> loopback@0 {
> compatible = "linux,spi-loopback-test";
> reg = <0>;
> spi-max-frequency = <10000000>;
This turned out to be way too high: reducing to 200000 makes
spi-loopback-test succeed.
> };
> };
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
