linux-kernel - Re: [PATCH v5 32/54] clk: mediatek: mt7986-apmixed: Use PLL

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Date:   Wed, 22 Feb 2023 18:03:13 +0000
From:   Daniel Golle <daniel@...rotopia.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     mturquette@...libre.com, sboyd@...nel.org, matthias.bgg@...il.com,
        wenst@...omium.org, johnson.wang@...iatek.com,
        miles.chen@...iatek.com, chun-jie.chen@...iatek.com,
        fparent@...libre.com, msp@...libre.com, nfraprado@...labora.com,
        rex-bc.chen@...iatek.com, zhaojh329@...il.com,
        sam.shih@...iatek.com, edward-jw.yang@...iatek.com,
        yangyingliang@...wei.com, granquet@...libre.com,
        pablo.sun@...iatek.com, sean.wang@...iatek.com,
        chen.zhong@...iatek.com, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v5 32/54] clk: mediatek: mt7986-apmixed: Use PLL_AO flag
 to set critical clock

On Wed, Feb 22, 2023 at 10:25:21AM +0100, AngeloGioacchino Del Regno wrote:
> Instead of calling clk_prepare_enable() at probe time, add the PLL_AO
> flag to CLK_APMIXED_ARMPLL clock: this will set CLK_IS_CRITICAL.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>

Tested-by: Daniel Golle <daniel@...rotopia.org>
(on BananaPi BPi-R3)

> ---
>  drivers/clk/mediatek/clk-mt7986-apmixed.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/clk/mediatek/clk-mt7986-apmixed.c b/drivers/clk/mediatek/clk-mt7986-apmixed.c
> index 62080ee4dbe3..227ca572056e 100644
> --- a/drivers/clk/mediatek/clk-mt7986-apmixed.c
> +++ b/drivers/clk/mediatek/clk-mt7986-apmixed.c
> @@ -42,7 +42,7 @@
>  		 "clkxtal")
>  
>  static const struct mtk_pll_data plls[] = {
> -	PLL(CLK_APMIXED_ARMPLL, "armpll", 0x0200, 0x020C, 0x0, 0, 32,
> +	PLL(CLK_APMIXED_ARMPLL, "armpll", 0x0200, 0x020C, 0x0, PLL_AO, 32,
>  	    0x0200, 4, 0, 0x0204, 0),
>  	PLL(CLK_APMIXED_NET2PLL, "net2pll", 0x0210, 0x021C, 0x0, 0, 32,
>  	    0x0210, 4, 0, 0x0214, 0),
> @@ -77,8 +77,6 @@ static int clk_mt7986_apmixed_probe(struct platform_device *pdev)
>  
>  	mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);
>  
> -	clk_prepare_enable(clk_data->hws[CLK_APMIXED_ARMPLL]->clk);
> -
>  	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
>  	if (r) {
>  		pr_err("%s(): could not register clock provider: %d\n",
> -- 
> 2.39.2
> 
>