linux-kernel - Re: [PATCH v5 34/54] clk: mediatek: mt7986-eth: Migrate to common probe mechanism

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Message-ID: <Y/ZYwOoHhO0328qY@makrotopia.org>
Date:   Wed, 22 Feb 2023 18:02:40 +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 34/54] clk: mediatek: mt7986-eth: Migrate to common
 probe mechanism

On Wed, Feb 22, 2023 at 10:25:23AM +0100, AngeloGioacchino Del Regno wrote:
> Convert this driver to use the common mtk_clk_simple_probe() mechanism.
> While at it, also remove __initconst annotations (as these structures
> are used also at runtime).
> 
> 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-eth.c | 83 +++++++++++----------------
>  1 file changed, 32 insertions(+), 51 deletions(-)
> 
> diff --git a/drivers/clk/mediatek/clk-mt7986-eth.c b/drivers/clk/mediatek/clk-mt7986-eth.c
> index e04bc6845ea6..138ba0a47221 100644
> --- a/drivers/clk/mediatek/clk-mt7986-eth.c
> +++ b/drivers/clk/mediatek/clk-mt7986-eth.c
> @@ -25,7 +25,7 @@ static const struct mtk_gate_regs sgmii0_cg_regs = {
>  #define GATE_SGMII0(_id, _name, _parent, _shift)		\
>  	GATE_MTK(_id, _name, _parent, &sgmii0_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)
>  
> -static const struct mtk_gate sgmii0_clks[] __initconst = {
> +static const struct mtk_gate sgmii0_clks[] = {
>  	GATE_SGMII0(CLK_SGMII0_TX250M_EN, "sgmii0_tx250m_en", "top_xtal", 2),
>  	GATE_SGMII0(CLK_SGMII0_RX250M_EN, "sgmii0_rx250m_en", "top_xtal", 3),
>  	GATE_SGMII0(CLK_SGMII0_CDR_REF, "sgmii0_cdr_ref", "top_xtal", 4),
> @@ -41,7 +41,7 @@ static const struct mtk_gate_regs sgmii1_cg_regs = {
>  #define GATE_SGMII1(_id, _name, _parent, _shift)		\
>  	GATE_MTK(_id, _name, _parent, &sgmii1_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)
>  
> -static const struct mtk_gate sgmii1_clks[] __initconst = {
> +static const struct mtk_gate sgmii1_clks[] = {
>  	GATE_SGMII1(CLK_SGMII1_TX250M_EN, "sgmii1_tx250m_en", "top_xtal", 2),
>  	GATE_SGMII1(CLK_SGMII1_RX250M_EN, "sgmii1_rx250m_en", "top_xtal", 3),
>  	GATE_SGMII1(CLK_SGMII1_CDR_REF, "sgmii1_cdr_ref", "top_xtal", 4),
> @@ -57,7 +57,7 @@ static const struct mtk_gate_regs eth_cg_regs = {
>  #define GATE_ETH(_id, _name, _parent, _shift)			\
>  	GATE_MTK(_id, _name, _parent, &eth_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)
>  
> -static const struct mtk_gate eth_clks[] __initconst = {
> +static const struct mtk_gate eth_clks[] = {
>  	GATE_ETH(CLK_ETH_FE_EN, "eth_fe_en", "netsys_2x_sel", 6),
>  	GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "sgm_325m_sel", 7),
>  	GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "sgm_325m_sel", 8),
> @@ -65,56 +65,37 @@ static const struct mtk_gate eth_clks[] __initconst = {
>  	GATE_ETH(CLK_ETH_WOCPU0_EN, "eth_wocpu0_en", "netsys_mcu_sel", 15),
>  };
>  
> -static void __init mtk_sgmiisys_0_init(struct device_node *node)
> -{
> -	struct clk_hw_onecell_data *clk_data;
> -	int r;
> -
> -	clk_data = mtk_alloc_clk_data(ARRAY_SIZE(sgmii0_clks));
> -
> -	mtk_clk_register_gates(NULL, node, sgmii0_clks,
> -			       ARRAY_SIZE(sgmii0_clks), clk_data);
> -
> -	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",
> -		       __func__, r);
> -}
> -CLK_OF_DECLARE(mtk_sgmiisys_0, "mediatek,mt7986-sgmiisys_0",
> -	       mtk_sgmiisys_0_init);
> -
> -static void __init mtk_sgmiisys_1_init(struct device_node *node)
> -{
> -	struct clk_hw_onecell_data *clk_data;
> -	int r;
> -
> -	clk_data = mtk_alloc_clk_data(ARRAY_SIZE(sgmii1_clks));
> -
> -	mtk_clk_register_gates(NULL, node, sgmii1_clks,
> -			       ARRAY_SIZE(sgmii1_clks), clk_data);
> -
> -	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",
> -		       __func__, r);
> -}
> -CLK_OF_DECLARE(mtk_sgmiisys_1, "mediatek,mt7986-sgmiisys_1",
> -	       mtk_sgmiisys_1_init);
> +static const struct mtk_clk_desc eth_desc = {
> +	.clks = eth_clks,
> +	.num_clks = ARRAY_SIZE(eth_clks),
> +};
>  
> -static void __init mtk_ethsys_init(struct device_node *node)
> -{
> -	struct clk_hw_onecell_data *clk_data;
> -	int r;
> +static const struct mtk_clk_desc sgmii0_desc = {
> +	.clks = sgmii0_clks,
> +	.num_clks = ARRAY_SIZE(sgmii0_clks),
> +};
>  
> -	clk_data = mtk_alloc_clk_data(ARRAY_SIZE(eth_clks));
> +static const struct mtk_clk_desc sgmii1_desc = {
> +	.clks = sgmii1_clks,
> +	.num_clks = ARRAY_SIZE(sgmii1_clks),
> +};
>  
> -	mtk_clk_register_gates(NULL, node, eth_clks, ARRAY_SIZE(eth_clks), clk_data);
> +static const struct of_device_id of_match_clk_mt7986_eth[] = {
> +	{ .compatible = "mediatek,mt7986-ethsys", .data = &eth_desc },
> +	{ .compatible = "mediatek,mt7986-sgmiisys_0", .data = &sgmii0_desc },
> +	{ .compatible = "mediatek,mt7986-sgmiisys_1", .data = &sgmii1_desc },
> +	{ /* sentinel */ }
> +};
>  
> -	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
> +static struct platform_driver clk_mt7986_eth_drv = {
> +	.driver = {
> +		.name = "clk-mt7986-eth",
> +		.of_match_table = of_match_clk_mt7986_eth,
> +	},
> +	.probe = mtk_clk_simple_probe,
> +	.remove = mtk_clk_simple_remove,
> +};
> +module_platform_driver(clk_mt7986_eth_drv);
>  
> -	if (r)
> -		pr_err("%s(): could not register clock provider: %d\n",
> -		       __func__, r);
> -}
> -CLK_OF_DECLARE(mtk_ethsys, "mediatek,mt7986-ethsys", mtk_ethsys_init);
> +MODULE_DESCRIPTION("MediaTek MT7986 Ethernet clocks driver");
> +MODULE_LICENSE("GPL");
> -- 
> 2.39.2
> 
>