linux-kernel - RE: [PATCH V3] clk: imx8m: fix bus critical clk registration

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Date:   Tue, 3 Nov 2020 01:03:44 +0000
From:   Peng Fan <peng.fan@....com>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     "sboyd@...nel.org" <sboyd@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        Abel Vesa <abel.vesa@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        Anson Huang <anson.huang@....com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Aisheng Dong <aisheng.dong@....com>
Subject: RE: [PATCH V3] clk: imx8m: fix bus critical clk registration

Shawn,

> Subject: Re: [PATCH V3] clk: imx8m: fix bus critical clk registration
> 
> On Sun, Nov 01, 2020 at 07:23:54PM +0800, peng.fan@....com wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > noc/axi/ahb are bus clk, not peripheral clk.
> > Since peripheral clk has a limitation that for peripheral clock slice,
> > IP clock slices must be stopped to change the clock source.
> >
> > However if the bus clk is marked as critical clk peripheral, the
> > assigned clock parent operation will fail.
> >
> > So we added CLK_SET_PARENT_GATE flag to avoid glitch.
> >
> > And add imx8m_clk_hw_composite_bus_critical for bus critical clock
> > usage
> >
> > Fixes: 936c383673b9e ("clk: imx: fix composite peripheral flags")
> > Reviewed-by: Abel Vesa <abel.vesa@....com>
> > Reported-by: Abel Vesa <abel.vesa@....com>
> > Signed-off-by: Peng Fan <peng.fan@....com>
> 
> Do you want this be picked up as a fix for 5.10-rc or non-critical stuff for
> -next?

Please take this as a fix for 5.10-rc.

Thanks,
Peng.

> 
> Shawn