linux-kernel - Re: [PATCH v4] drivers/soc/litex: Add restart handler

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Message-ID: <CAMuHMdXwrsgQNAF=7cObLw-j7jGvKERPaMd76FJaD2whhGSdrg@mail.gmail.com>
Date:   Wed, 20 Jan 2021 09:21:53 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Anup Patel <anup@...infault.org>
Cc:     Stafford Horne <shorne@...il.com>,
        Karol Gugala <kgugala@...micro.com>,
        Mateusz Holenko <mholenko@...micro.com>,
        Gabriel Somlo <gsomlo@...il.com>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] drivers/soc/litex: Add restart handler

Hi Anup,

On Tue, Jan 19, 2021 at 9:18 AM Anup Patel <anup@...infault.org> wrote:
> On Tue, Jan 19, 2021 at 1:40 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > Let the LiteX SoC Controller register a restart handler, which resets
> > the LiteX SoC by writing 1 to CSR_CTRL_RESET_ADDR.
> >
> > Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
>
> We have SBI System Reset Extension (SRST) in upcoming
> SBI v0.3 spec. Using this SBI extension, you will not require a
> dedicated reboot driver for various projects such as Linux kernel,
> U-Boot, EDK2, FreeBSD kernel, etc.
>
> The OpenSBI v0.9 (released yesterday) already has SBI SRST
> extension implemented so we will just need platform hooks for
> LiteX.
>
> The Linux support for SRST extension is already available on
> LKML so far no comments: https://lkml.org/lkml/2020/11/25/6

Thanks, that would cover RISC-V.
But what about other users of LiteX, like openrisc and powerpc?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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