Hi Shimoda-san,
On Thu, Jan 12, 2023 at 9:02 AM Yoshihiro Shimoda
<yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> > From: Geert Uytterhoeven, Sent: Thursday, January 12, 2023 1:20 AM
> > On Thu, Dec 22, 2022 at 10:33 AM Yoshihiro Shimoda
> > <yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> > > Enable UFS device for R-Car S4-8 Spider CPU board.
> > >
> > > Note that the conditions of RC21012 on the Spider are:
> > > - OUT11 (for UFS30_REFCLK_V) is disabled as default.
> > > - OUT11 is controlled by GPIO0 pin.
> > > - The GPIO0 pin is inverted sense (low active) and pull-up enabled.
> > > To output the clock, pin 4 of TCA9554 on the Spider board needs to
> > > output low level so that using "gpio-gate-clock" for it.
> >
> > Does this mean the GPIO setup was the only missing part,
> > and the i2c commands from [1] were not needed?
>
> You're correct.
>
> > I wanted to give this a try, but the remote Spider is offline.
The remote Spider access issue was fixed, and the three
UFS subdevices are detected fine.
Hdparm says 280 MB/s (compared to 170 for eMMC).
Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
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
