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Message-ID: <15ba8f05-8909-4ade-b0f3-c98cad0bd9f0@wanadoo.fr>
Date: Thu, 22 Aug 2024 15:20:10 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Yangtao Li <frank.li@...o.com>, clement.leger@...tlin.com,
andrew@...n.ch, f.fainelli@...il.com, olteanv@...il.com,
davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com, ulli.kroll@...glemail.com, linus.walleij@...aro.org,
marcin.s.wojtas@...il.com, linux@...linux.org.uk,
alexandre.torgue@...s.st.com, joabreu@...opsys.com, hkallweit1@...il.com,
justinstitt@...gle.com, kees@...nel.org, u.kleine-koenig@...gutronix.de,
jacob.e.keller@...el.com, horms@...nel.org, shannon.nelson@....com
Cc: linux-renesas-soc@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-stm32@...md-mailman.stormreply.com
Subject: Re: [net-next 8/9] net: mvpp2: Convert to devm_clk_get_enabled() and
devm_clk_get_optional_enabled()
Le 22/08/2024 à 10:47, Yangtao Li a écrit :
> Use devm_clk_get_enabled() and devm_clk_get_optional_enabled()
> to simplify code.
>
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
> drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 7 --
> .../net/ethernet/marvell/mvpp2/mvpp2_main.c | 86 +++++--------------
> 2 files changed, 22 insertions(+), 71 deletions(-)
>
> diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
> index 9e02e4367bec..643a645e8097 100644
> --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
> +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
> @@ -1044,13 +1044,6 @@ struct mvpp2 {
> */
> struct regmap *sysctrl_base;
>
> - /* Common clocks */
> - struct clk *pp_clk;
> - struct clk *gop_clk;
> - struct clk *mg_clk;
> - struct clk *mg_core_clk;
> - struct clk *axi_clk;
> -
> /* List of pointers to port structures */
> int port_count;
> struct mvpp2_port *port_list[MVPP2_MAX_PORTS];
> diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> index 2fe8bae4eb3c..0075499de29f 100644
> --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> @@ -7462,6 +7462,7 @@ static int mvpp2_get_sram(struct platform_device *pdev,
>
> static int mvpp2_probe(struct platform_device *pdev)
> {
> + struct clk *pp_clk, *gop_clk, *mg_clk, *mg_core_clk, *axi_clk;
Hi,
Nitpick: you could also define just struct clk *pp_clk, *clk; and reuse
clk for most calls.
*Maybe* clk_get_rate() could be moved in order to only need 1 clk.
CJ
> struct mvpp2 *priv;
> struct resource *res;
> void __iomem *base;
> @@ -7561,56 +7562,30 @@ static int mvpp2_probe(struct platform_device *pdev)
> priv->max_port_rxqs = 32;
>
> if (dev_of_node(&pdev->dev)) {
> - priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk");
> - if (IS_ERR(priv->pp_clk))
> - return PTR_ERR(priv->pp_clk);
> - err = clk_prepare_enable(priv->pp_clk);
> - if (err < 0)
> - return err;
> + pp_clk = devm_clk_get_enabled(&pdev->dev, "pp_clk");
> + if (IS_ERR(pp_clk))
> + return PTR_ERR(pp_clk);
>
> - priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk");
> - if (IS_ERR(priv->gop_clk)) {
> - err = PTR_ERR(priv->gop_clk);
> - goto err_pp_clk;
> - }
> - err = clk_prepare_enable(priv->gop_clk);
> - if (err < 0)
> - goto err_pp_clk;
> + gop_clk = devm_clk_get_enabled(&pdev->dev, "gop_clk");
> + if (IS_ERR(gop_clk))
> + return PTR_ERR(gop_clk);
>
> if (priv->hw_version >= MVPP22) {
> - priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk");
> - if (IS_ERR(priv->mg_clk)) {
> - err = PTR_ERR(priv->mg_clk);
> - goto err_gop_clk;
> - }
> -
> - err = clk_prepare_enable(priv->mg_clk);
> - if (err < 0)
> - goto err_gop_clk;
> -
> - priv->mg_core_clk = devm_clk_get_optional(&pdev->dev, "mg_core_clk");
> - if (IS_ERR(priv->mg_core_clk)) {
> - err = PTR_ERR(priv->mg_core_clk);
> - goto err_mg_clk;
> - }
> + mg_clk = devm_clk_get_enabled(&pdev->dev, "mg_clk");
> + if (IS_ERR(mg_clk))
> + return PTR_ERR(mg_clk);
>
> - err = clk_prepare_enable(priv->mg_core_clk);
> - if (err < 0)
> - goto err_mg_clk;
> + mg_core_clk = devm_clk_get_optional_enabled(&pdev->dev, "mg_core_clk");
> + if (IS_ERR(mg_core_clk))
> + return PTR_ERR(mg_core_clk);
> }
>
> - priv->axi_clk = devm_clk_get_optional(&pdev->dev, "axi_clk");
> - if (IS_ERR(priv->axi_clk)) {
> - err = PTR_ERR(priv->axi_clk);
> - goto err_mg_core_clk;
> - }
> -
> - err = clk_prepare_enable(priv->axi_clk);
> - if (err < 0)
> - goto err_mg_core_clk;
> + axi_clk = devm_clk_get_optional_enabled(&pdev->dev, "axi_clk");
> + if (IS_ERR(axi_clk))
> + return PTR_ERR(axi_clk);
>
> /* Get system's tclk rate */
> - priv->tclk = clk_get_rate(priv->pp_clk);
> + priv->tclk = clk_get_rate(pp_clk);
> } else {
> err = device_property_read_u32(&pdev->dev, "clock-frequency", &priv->tclk);
> if (err) {
> @@ -7622,7 +7597,7 @@ static int mvpp2_probe(struct platform_device *pdev)
> if (priv->hw_version >= MVPP22) {
> err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK);
> if (err)
> - goto err_axi_clk;
> + return err;
> /* Sadly, the BM pools all share the same register to
> * store the high 32 bits of their address. So they
> * must all have the same high 32 bits, which forces
> @@ -7630,7 +7605,7 @@ static int mvpp2_probe(struct platform_device *pdev)
> */
> err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
> if (err)
> - goto err_axi_clk;
> + return err;
> }
>
> /* Map DTS-active ports. Should be done before FIFO mvpp2_init */
> @@ -7649,12 +7624,12 @@ static int mvpp2_probe(struct platform_device *pdev)
> err = mvpp2_init(pdev, priv);
> if (err < 0) {
> dev_err(&pdev->dev, "failed to initialize controller\n");
> - goto err_axi_clk;
> + return err;
> }
>
> err = mvpp22_tai_probe(&pdev->dev, priv);
> if (err < 0)
> - goto err_axi_clk;
> + return err;
>
> /* Initialize ports */
> device_for_each_child_node_scoped(&pdev->dev, port_fwnode) {
> @@ -7665,8 +7640,7 @@ static int mvpp2_probe(struct platform_device *pdev)
>
> if (priv->port_count == 0) {
> dev_err(&pdev->dev, "no ports enabled\n");
> - err = -ENODEV;
> - goto err_axi_clk;
> + return -ENODEV;
> }
>
> /* Statistics must be gathered regularly because some of them (like
> @@ -7698,16 +7672,6 @@ static int mvpp2_probe(struct platform_device *pdev)
> err_port_probe:
> for (i = 0; i < priv->port_count; i++)
> mvpp2_port_remove(priv->port_list[i]);
> -err_axi_clk:
> - clk_disable_unprepare(priv->axi_clk);
> -err_mg_core_clk:
> - clk_disable_unprepare(priv->mg_core_clk);
> -err_mg_clk:
> - clk_disable_unprepare(priv->mg_clk);
> -err_gop_clk:
> - clk_disable_unprepare(priv->gop_clk);
> -err_pp_clk:
> - clk_disable_unprepare(priv->pp_clk);
> return err;
> }
>
> @@ -7745,12 +7709,6 @@ static void mvpp2_remove(struct platform_device *pdev)
>
> if (!dev_of_node(&pdev->dev))
> return;
> -
> - clk_disable_unprepare(priv->axi_clk);
> - clk_disable_unprepare(priv->mg_core_clk);
> - clk_disable_unprepare(priv->mg_clk);
> - clk_disable_unprepare(priv->pp_clk);
> - clk_disable_unprepare(priv->gop_clk);
> }
>
> static const struct of_device_id mvpp2_match[] = {
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