linux-kernel - Re: [PATCH] clk: imx8mn: Keep uart clocks on for early console

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Message-ID: <20190726083840.k26dyjgpq4b56gab@fsr-ub1664-175>
Date:   Fri, 26 Jul 2019 11:38:40 +0300
From:   Abel Vesa <abel.vesa@....com>
To:     Anson.Huang@....com
Cc:     mturquette@...libre.com, sboyd@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Linux-imx@....com
Subject: Re: [PATCH] clk: imx8mn: Keep uart clocks on for early console

On 19-07-24 15:50:17, Anson.Huang@....com wrote:
> From: Anson Huang <Anson.Huang@....com>
> 
> Call imx_register_uart_clocks() API to keep uart clocks enabled
> when earlyprintk or earlycon is active.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>

Reviewed-by: Abel Vesa <abel.vesa@....com>

> ---
>  drivers/clk/imx/clk-imx8mn.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
> index 07481a5..ecd1062 100644
> --- a/drivers/clk/imx/clk-imx8mn.c
> +++ b/drivers/clk/imx/clk-imx8mn.c
> @@ -355,6 +355,14 @@ static const char * const imx8mn_clko2_sels[] = {"osc_24m", "sys_pll2_200m", "sy
>  static struct clk *clks[IMX8MN_CLK_END];
>  static struct clk_onecell_data clk_data;
>  
> +static struct clk ** const uart_clks[] = {
> +	&clks[IMX8MN_CLK_UART1_ROOT],
> +	&clks[IMX8MN_CLK_UART2_ROOT],
> +	&clks[IMX8MN_CLK_UART3_ROOT],
> +	&clks[IMX8MN_CLK_UART4_ROOT],
> +	NULL
> +};
> +
>  static int imx8mn_clocks_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> @@ -612,6 +620,8 @@ static int imx8mn_clocks_probe(struct platform_device *pdev)
>  		goto unregister_clks;
>  	}
>  
> +	imx_register_uart_clocks(uart_clks);
> +
>  	return 0;
>  
>  unregister_clks:
> -- 
> 2.7.4
>