linux-kernel - Re: [linux-sunxi] [PATCH] ARM: sunxi: Fix CPU powerdown on A83T

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Message-ID: <CAGb2v67Vy=tD4dfSXD+=HS3B2tEE-bH2D++gx9Oa=P8n-012ew@mail.gmail.com>
Date:   Tue, 29 Oct 2019 09:09:40 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Ondřej Jirman <megous@...ous.com>
Cc:     linux-sunxi <linux-sunxi@...glegroups.com>,
        stable <stable@...r.kernel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        "moderated list:ARM/Allwinner sunXi SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [linux-sunxi] [PATCH] ARM: sunxi: Fix CPU powerdown on A83T

On Tue, Oct 29, 2019 at 5:49 AM Ondrej Jirman <megous@...ous.com> wrote:
>
> PRCM_PWROFF_GATING_REG has CPU0 at bit 4 on A83T. So without this
> patch, instead of gating the CPU0, the whole cluster was power gated,
> when shutting down first CPU in the cluster.
>
> Fixes: 6961275e72a8c1 ("ARM: sun8i: smp: Add support for A83T")
> Signed-off-by: Ondrej Jirman <megous@...ous.com>
> Cc: stable@...r.kernel.org

Acked-by: Chen-Yu Tsai <wens@...e.org>

Though I distinctly remember the BSP had some code dealing with chip
revisions in which the two bits were reversed. :(