linux-kernel - Re: [PATCH 5/6] clk: imx8mq: Remove CLK_IS_CRITICAL flag for IMX8MQ_CLK_TMU

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Date:   Sat, 27 Jul 2019 01:26:50 +0300
From:   Daniel Baluta <daniel.baluta@...il.com>
To:     Anson Huang <Anson.Huang@....com>
Cc:     rui.zhang@...el.com, edubezval@...il.com,
        daniel.lezcano@...aro.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Lucas Stach <l.stach@...gutronix.de>,
        Abel Vesa <abel.vesa@....com>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        "Angus Ainslie (Purism)" <angus@...ea.ca>,
        Carlo Caione <ccaione@...libre.com>,
        Guido Günther <agx@...xcpu.org>,
        Leonard Crestez <leonard.crestez@....com>,
        linux-pm@...r.kernel.org,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-clk@...r.kernel.org, dl-linux-imx <Linux-imx@....com>
Subject: Re: [PATCH 5/6] clk: imx8mq: Remove CLK_IS_CRITICAL flag for IMX8MQ_CLK_TMU_ROOT

Hi all,

latest linux-next hangs at boot.

commit fde50b96be821ac9673a7e00847cc4605bd88f34 (HEAD -> master, tag:
next-20190726, origin/master, origin/HEAD)
Author: Stephen Rothwell <sfr@...b.auug.org.au>
Date:   Fri Jul 26 15:18:02 2019 +1000

    Add linux-next specific files for 20190726

    Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>


I know this is crazy but reverting commit:

commit 431bdd1df48ee2896ea9980d9153e3aeaf0c81ef (refs/bisect/bad)
Author: Anson Huang <Anson.Huang@....com>
Date:   Fri Jul 5 12:56:11 2019 +0800

    clk: imx8mq: Remove CLK_IS_CRITICAL flag for IMX8MQ_CLK_TMU_ROOT

    IMX8MQ_CLK_TMU_ROOT is ONLY used for thermal module, the driver
    should manage this clock, so no need to have CLK_IS_CRITICAL flag
    set.



makes the boot work again.

Any idea?

On Fri, Jul 5, 2019 at 8:07 AM <Anson.Huang@....com> wrote:
>
> From: Anson Huang <Anson.Huang@....com>
>
> IMX8MQ_CLK_TMU_ROOT is ONLY used for thermal module, the driver
> should manage this clock, so no need to have CLK_IS_CRITICAL flag
> set.
>
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  drivers/clk/imx/clk-imx8mq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/clk/imx/clk-imx8mq.c b/drivers/clk/imx/clk-imx8mq.c
> index d407a07..91de69a 100644
> --- a/drivers/clk/imx/clk-imx8mq.c
> +++ b/drivers/clk/imx/clk-imx8mq.c
> @@ -539,7 +539,7 @@ static int imx8mq_clocks_probe(struct platform_device *pdev)
>         clks[IMX8MQ_CLK_DISP_AXI_ROOT]  = imx_clk_gate2_shared2("disp_axi_root_clk", "disp_axi", base + 0x45d0, 0, &share_count_dcss);
>         clks[IMX8MQ_CLK_DISP_APB_ROOT]  = imx_clk_gate2_shared2("disp_apb_root_clk", "disp_apb", base + 0x45d0, 0, &share_count_dcss);
>         clks[IMX8MQ_CLK_DISP_RTRM_ROOT] = imx_clk_gate2_shared2("disp_rtrm_root_clk", "disp_rtrm", base + 0x45d0, 0, &share_count_dcss);
> -       clks[IMX8MQ_CLK_TMU_ROOT] = imx_clk_gate4_flags("tmu_root_clk", "ipg_root", base + 0x4620, 0, CLK_IS_CRITICAL);
> +       clks[IMX8MQ_CLK_TMU_ROOT] = imx_clk_gate4("tmu_root_clk", "ipg_root", base + 0x4620, 0);
>         clks[IMX8MQ_CLK_VPU_DEC_ROOT] = imx_clk_gate2_flags("vpu_dec_root_clk", "vpu_bus", base + 0x4630, 0, CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE);
>         clks[IMX8MQ_CLK_CSI1_ROOT] = imx_clk_gate4("csi1_root_clk", "csi1_core", base + 0x4650, 0);
>         clks[IMX8MQ_CLK_CSI2_ROOT] = imx_clk_gate4("csi2_root_clk", "csi2_core", base + 0x4660, 0);
> --
> 2.7.4
>