linux-kernel - RE: [PATCH v1] clk: imx6ul: fix "failed to get parent" error

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Date:   Sun, 12 Mar 2023 12:57:51 +0000
From:   Peng Fan <peng.fan@....com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>,
        Abel Vesa <abelvesa@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v1] clk: imx6ul: fix "failed to get parent" error

> Subject: [PATCH v1] clk: imx6ul: fix "failed to get parent" error
> 
> On some configuration we may get following error:
> [    0.000000] imx:clk-gpr-mux: failed to get parent (-EINVAL)
> 
> This happens if selector is configured to not supported value. To avoid this
> warnings add dummy parents for not supported values.
> 
> Fixes: 4e197ee880c2 ("clk: imx6ul: add ethernet refclock mux support")
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
[Peng Fan] 

Reviewed-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/clk/imx/clk-imx6ul.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c index
> 2836adb817b7..e3696a88b5a3 100644
> --- a/drivers/clk/imx/clk-imx6ul.c
> +++ b/drivers/clk/imx/clk-imx6ul.c
> @@ -95,14 +95,16 @@ static const struct clk_div_table video_div_table[] = {
>  	{ }
>  };
> 
> -static const char * enet1_ref_sels[] = { "enet1_ref_125m",
> "enet1_ref_pad", };
> +static const char * enet1_ref_sels[] = { "enet1_ref_125m",
> +"enet1_ref_pad", "dummy", "dummy"};
>  static const u32 enet1_ref_sels_table[] =
> { IMX6UL_GPR1_ENET1_TX_CLK_DIR,
> -					    IMX6UL_GPR1_ENET1_CLK_SEL };
> +					    IMX6UL_GPR1_ENET1_CLK_SEL, 0,
> +
> IMX6UL_GPR1_ENET1_TX_CLK_DIR | IMX6UL_GPR1_ENET1_CLK_SEL };
>  static const u32 enet1_ref_sels_table_mask =
> IMX6UL_GPR1_ENET1_TX_CLK_DIR |
>  					     IMX6UL_GPR1_ENET1_CLK_SEL;
> -static const char * enet2_ref_sels[] = { "enet2_ref_125m",
> "enet2_ref_pad", };
> +static const char * enet2_ref_sels[] = { "enet2_ref_125m",
> +"enet2_ref_pad", "dummy", "dummy"};
>  static const u32 enet2_ref_sels_table[] =
> { IMX6UL_GPR1_ENET2_TX_CLK_DIR,
> -					    IMX6UL_GPR1_ENET2_CLK_SEL };
> +					    IMX6UL_GPR1_ENET2_CLK_SEL, 0,
> +
> IMX6UL_GPR1_ENET2_TX_CLK_DIR | IMX6UL_GPR1_ENET2_CLK_SEL };
>  static const u32 enet2_ref_sels_table_mask =
> IMX6UL_GPR1_ENET2_TX_CLK_DIR |
>  					     IMX6UL_GPR1_ENET2_CLK_SEL;
> 
> --
> 2.30.2