Re: [PATCH v4 0/7] treewide: scsi: ufs: Add support for Renesas R-Car UFS controller

[Geert Uytterhoeven <geert@linux-m68k.org>]

Hi Shimoda-san,

On Wed, Apr 20, 2022 at 8:17 AM Yoshihiro Shimoda
<yoshihiro.shimoda.uh@renesas.com> wrote:
> This patch series adds support Renesas R-Car S4-8 UFS controller.

Thanks for your series!

> This controller has some restrictions so adds some quirks for it.
> Before using this driver, we have to initialize a clock generator
> on the environment board (named "Spider") by using the commands of
> U-Boot like below:
>  => i2c dev 0
>  => i2c mw 0x6c 0x26 0x05
>  => i2c olen 0x6c 2
>  => i2c mw 0x6c 0x26c 0x2e

You mean we need a driver for the RC21212 clock generator? ;-)

Or the boot loader should program the clock generator, like is done
on other R-Car boards for e.g. the PCIe clock (BTW, RC21212 also
generates the PCIe clock on Spider)?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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