linux-kernel - Re: [PATCH 6/6] clk: imx93: keep sys ctr clock always on

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Date:   Thu, 27 Oct 2022 16:05:29 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Peng Fan (OSS) <peng.fan@....nxp.com>, abel.vesa@...aro.org,
        abelvesa@...nel.org, festevam@...il.com, kernel@...gutronix.de,
        krzysztof.kozlowski+dt@...aro.org, mturquette@...libre.com,
        robh+dt@...nel.org, s.hauer@...gutronix.de, shawnguo@...nel.org
Cc:     linux-imx@....com, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Jacky Bai <ping.bai@....com>,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH 6/6] clk: imx93: keep sys ctr clock always on

Quoting Peng Fan (OSS) (2022-10-27 03:11:59)
> From: Jacky Bai <ping.bai@....com>
> 
> Keep sys ctr clock always on to make sure its register
> can be accessed for cpuidle.
> 
> Reviewed-by: Peng Fan <peng.fan@....com>
> Signed-off-by: Jacky Bai <ping.bai@....com>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/clk/imx/clk-imx93.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/imx/clk-imx93.c b/drivers/clk/imx/clk-imx93.c
> index 74e8d810db7f..91db356564c1 100644
> --- a/drivers/clk/imx/clk-imx93.c
> +++ b/drivers/clk/imx/clk-imx93.c
> @@ -238,7 +238,7 @@ static const struct imx93_clk_ccgr {
>         { IMX93_CLK_HSIO_32K_GATE,      "hsio_32k",     "osc_32k",              0x9dc0, },
>         { IMX93_CLK_ENET1_GATE,         "enet1",        "wakeup_axi_root",      0x9e00, },
>         { IMX93_CLK_ENET_QOS_GATE,      "enet_qos",     "wakeup_axi_root",      0x9e40, },
> -       { IMX93_CLK_SYS_CNT_GATE,       "sys_cnt",      "osc_24m",              0x9e80, },
> +       { IMX93_CLK_SYS_CNT_GATE,       "sys_cnt",      "osc_24m",              0x9e80, CLK_IS_CRITICAL},

Please add a comment like

	/* Critical because clk accessed during CPU idle */

>         { IMX93_CLK_TSTMR1_GATE,        "tstmr1",       "bus_aon_root",         0x9ec0, },
>         { IMX93_CLK_TSTMR2_GATE,        "tstmr2",       "bus_wakeup_root",      0x9f00, },
>         { IMX93_CLK_TMC_GATE,           "tmc",          "osc_24m",              0x9f40, },