linux-kernel - Re: [PATCH] MIPS: pci-mt7620: fix PLL lock check

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Message-ID: <20210312102730.GC7027@alpha.franken.de>
Date:   Fri, 12 Mar 2021 11:27:30 +0100
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        John Crispin <john@...ozen.org>, linux-mips@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] MIPS: pci-mt7620: fix PLL lock check

On Sat, Mar 06, 2021 at 08:17:24PM -0800, Ilya Lipnitskiy wrote:
> Upstream a long-standing OpenWrt patch [0] that fixes MT7620 PCIe PLL
> lock check. The existing code checks the wrong register bit: PPLL_SW_SET
> is not defined in PPLL_CFG1 and bit 31 of PPLL_CFG1 is marked as reserved
> in the MT7620 Programming Guide. The correct bit to check for PLL lock
> is PPLL_LD (bit 23).
> 
> Also reword the error message for clarity.
> 
> Without this change it is unlikely that this driver ever worked with
> mainline kernel.
> 
> [0]: https://lists.infradead.org/pipermail/lede-commits/2017-July/004441.html
> 
> Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>
> Cc: John Crispin <john@...ozen.org>
> Cc: linux-mips@...r.kernel.org
> Cc: linux-mediatek@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Cc: stable@...r.kernel.org
> ---
>  arch/mips/pci/pci-mt7620.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

applied to mips-next.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]