linux-kernel - Re: [PATCH 2/5] phy: renesas: rcar-gen3-usb2: Store drvdata pointer in channel

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Message-ID: <9549b800-2205-428a-8056-cfc6b5255850@linaro.org>
Date: Wed, 6 Aug 2025 16:06:02 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Prabhakar <prabhakar.csengg@...il.com>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Magnus Damm <magnus.damm@...il.com>
Cc: linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
 Biju Das <biju.das.jz@...renesas.com>,
 Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
 Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH 2/5] phy: renesas: rcar-gen3-usb2: Store drvdata pointer
 in channel

On 05/08/2025 14:25, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Store the SoC-specific driver data pointer (struct rcar_gen3_phy_drv_data)
> directly in struct rcar_gen3_chan instead of copying individual flags
> into separate fields. Update all references to use channel->drvdata->flags,
> removing the redundant soc_no_adp_ctrl and utmi_ctrl members from the
> channel structure.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
>   drivers/phy/renesas/phy-rcar-gen3-usb2.c | 17 +++++++----------
>   1 file changed, 7 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> index 47beb94cd424..cfa9667c7680 100644
> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> @@ -122,6 +122,7 @@ struct rcar_gen3_phy {
>   struct rcar_gen3_chan {
>   	void __iomem *base;
>   	struct device *dev;	/* platform_device's device */
> +	const struct rcar_gen3_phy_drv_data *drvdata;

Why not phy_data ?

>   	struct extcon_dev *extcon;
>   	struct rcar_gen3_phy rphys[NUM_OF_PHYS];
>   	struct regulator *vbus;
> @@ -133,8 +134,6 @@ struct rcar_gen3_chan {
>   	bool extcon_host;
>   	bool is_otg_channel;
>   	bool uses_otg_pins;
> -	bool soc_no_adp_ctrl;
> -	bool utmi_ctrl;
>   };
>   
>   struct rcar_gen3_phy_drv_data {
> @@ -204,7 +203,7 @@ static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus)
>   	u32 val;
>   
>   	dev_vdbg(ch->dev, "%s: %08x, %d\n", __func__, val, vbus);
> -	if (ch->soc_no_adp_ctrl) {
> +	if (ch->drvdata->no_adp_ctrl) {
>   		if (ch->vbus)
>   			regulator_hardware_enable(ch->vbus, vbus);
>   
> @@ -290,7 +289,7 @@ static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch)
>   	if (!ch->uses_otg_pins)
>   		return (ch->dr_mode == USB_DR_MODE_HOST) ? false : true;
>   
> -	if (ch->soc_no_adp_ctrl)
> +	if (ch->drvdata->no_adp_ctrl)
>   		return !!(readl(ch->base + USB2_LINECTRL1) & USB2_LINECTRL1_USB2_IDMON);
>   
>   	return !!(readl(ch->base + USB2_ADPCTRL) & USB2_ADPCTRL_IDDIG);
> @@ -421,7 +420,7 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
>   	      USB2_LINECTRL1_DMRPD_EN | USB2_LINECTRL1_DM_RPD;
>   	writel(val, usb2_base + USB2_LINECTRL1);
>   
> -	if (!ch->soc_no_adp_ctrl) {
> +	if (!ch->drvdata->no_adp_ctrl) {
>   		val = readl(usb2_base + USB2_VBCTRL);
>   		val &= ~USB2_VBCTRL_OCCLREN;
>   		writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
> @@ -487,7 +486,7 @@ static int rcar_gen3_phy_usb2_init(struct phy *p)
>   	if (rphy->int_enable_bits)
>   		rcar_gen3_init_otg(channel);
>   
> -	if (channel->utmi_ctrl) {
> +	if (channel->drvdata->utmi_ctrl) {
>   		val = readl(usb2_base + USB2_REGEN_CG_CTRL) | USB2_REGEN_CG_CTRL_UPHY_WEN;
>   		writel(val, usb2_base + USB2_REGEN_CG_CTRL);
>   
> @@ -778,6 +777,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>   		ret = -EINVAL;
>   		goto error;
>   	}
> +	channel->drvdata = phy_data;

Replace the whole block with:
	
	channel->drvdata = device_get_match_data(dev);
	if (!channel->drvdata) {
		ret = -EINVAL;
		goto error;
	}

and drop the local phy_data.

>   
>   	platform_set_drvdata(pdev, channel);
>   	channel->dev = dev;
> @@ -788,12 +788,9 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>   			goto error;
>   	}
>   
> -	channel->soc_no_adp_ctrl = phy_data->no_adp_ctrl;
>   	if (phy_data->no_adp_ctrl)
>   		channel->obint_enable_bits = USB2_OBINT_IDCHG_EN;
>   
> -	channel->utmi_ctrl = phy_data->utmi_ctrl;
> -
>   	spin_lock_init(&channel->lock);
>   	for (i = 0; i < NUM_OF_PHYS; i++) {
>   		channel->rphys[i].phy = devm_phy_create(dev, NULL,
> @@ -808,7 +805,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>   		phy_set_drvdata(channel->rphys[i].phy, &channel->rphys[i]);
>   	}
>   

Thanks,
Neil
> -	if (channel->soc_no_adp_ctrl && channel->is_otg_channel)
> +	if (channel->drvdata->no_adp_ctrl && channel->is_otg_channel)
>   		channel->vbus = devm_regulator_get_exclusive(dev, "vbus");
>   	else
>   		channel->vbus = devm_regulator_get_optional(dev, "vbus");