linux-kernel - RE: [PATCH V3 10/10] clk: imx8mp: mark memrepair clock as critical

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Date:   Thu, 7 May 2020 07:59:16 +0000
From:   Peng Fan <peng.fan@....com>
To:     Aisheng Dong <aisheng.dong@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        Leonard Crestez <leonard.crestez@....com>,
        Abel Vesa <abel.vesa@....com>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Anson Huang <anson.huang@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH V3 10/10] clk: imx8mp: mark memrepair clock as critical

> Subject: RE: [PATCH V3 10/10] clk: imx8mp: mark memrepair clock as critical
> 
> > From: Peng Fan <peng.fan@....com>
> > Sent: Thursday, May 7, 2020 1:56 PM
> >
> > If memrepair root clock in CCM is disabled, the memory repair logic in
> > HDMIMIX can’t work. So let's mark it as critical clock.
> 
> A small question here:
> Is this clock critical for the whole system or only for HDMIMIX?
> What if HDMIIX is not enabled?

It is not only for HDMI, but for Linux runtime, it only affect HDMI for now
per my understanding, so
Let's drop this patch from this patchset for now.

Shawn,
  Since just drop this patch 10 from v3, there is no need for me to send v4?

Thanks,
Peng.

> 
> Regards
> Aisheng
> 
> >
> > Reviewed-by: Leonard Crestez <leonard.crestez@....com>
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  drivers/clk/imx/clk-imx8mp.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/clk/imx/clk-imx8mp.c
> > b/drivers/clk/imx/clk-imx8mp.c index b4d9db9d5bf1..a7c59d7a40de
> 100644
> > --- a/drivers/clk/imx/clk-imx8mp.c
> > +++ b/drivers/clk/imx/clk-imx8mp.c
> > @@ -590,7 +590,7 @@ static int imx8mp_clocks_probe(struct
> > platform_device
> > *pdev)
> >  	hws[IMX8MP_CLK_VPU_G2] = imx8m_clk_hw_composite("vpu_g2",
> > imx8mp_vpu_g2_sels, ccm_base + 0xa180);
> >  	hws[IMX8MP_CLK_CAN1] = imx8m_clk_hw_composite("can1",
> > imx8mp_can1_sels, ccm_base + 0xa200);
> >  	hws[IMX8MP_CLK_CAN2] = imx8m_clk_hw_composite("can2",
> > imx8mp_can2_sels, ccm_base + 0xa280);
> > -	hws[IMX8MP_CLK_MEMREPAIR] =
> > imx8m_clk_hw_composite("memrepair", imx8mp_memrepair_sels,
> ccm_base +
> > 0xa300);
> > +	hws[IMX8MP_CLK_MEMREPAIR] =
> > +imx8m_clk_hw_composite_critical("memrepair",
> imx8mp_memrepair_sels,
> > +ccm_base + 0xa300);
> >  	hws[IMX8MP_CLK_PCIE_PHY] = imx8m_clk_hw_composite("pcie_phy",
> > imx8mp_pcie_phy_sels, ccm_base + 0xa380);
> >  	hws[IMX8MP_CLK_PCIE_AUX] = imx8m_clk_hw_composite("pcie_aux",
> > imx8mp_pcie_aux_sels, ccm_base + 0xa400);
> >  	hws[IMX8MP_CLK_I2C5] = imx8m_clk_hw_composite("i2c5",
> > imx8mp_i2c5_sels, ccm_base + 0xa480);
> > --
> > 2.16.4