linux-kernel - Re: [PATCH 4/8] phy: renesas: rcar-gen3-usb2: Check a property to use otg pins

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Date:   Tue, 25 Sep 2018 09:25:29 +0200
From:   Simon Horman <horms@...ge.net.au>
To:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Cc:     kishon@...com, robh+dt@...nel.org, mark.rutland@....com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH 4/8] phy: renesas: rcar-gen3-usb2: Check a property to
 use otg pins

On Fri, Sep 21, 2018 at 08:53:20PM +0900, Yoshihiro Shimoda wrote:
> Since All R-Car Gen3 SoCs have dedicated otg pins actually but
> some boards don't use the otg pins (e.g. R-Car D3 Draak and R-Car E3
> Ebisu), the driver should not choose SoC model base by using
> rcar_gen3_phy_usb2_match_table's data. So, this patch checks a
> "renesas,no-otg-pins" property to set the "uses_otg_pins".
> 
> Note that since r8a77995-draak.dts and r8a77990-ebisu.dts don't have
> 'dr_mode = "otg";' for now, if we apply this patch, no behavior
> changes (the value of "uses_otg_pins" is false).
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>

Reviewed-by: Simon Horman <horms+renesas@...ge.net.au>

> ---
>  drivers/phy/renesas/phy-rcar-gen3-usb2.c | 24 ++++++------------------
>  1 file changed, 6 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> index d69317e..856056e 100644
> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> @@ -78,8 +78,6 @@
>  #define USB2_ADPCTRL_IDPULLUP		BIT(5)	/* 1 = ID sampling is enabled */
>  #define USB2_ADPCTRL_DRVVBUS		BIT(4)
>  
> -#define RCAR_GEN3_PHY_HAS_DEDICATED_PINS	1
> -
>  struct rcar_gen3_chan {
>  	void __iomem *base;
>  	struct extcon_dev *extcon;
> @@ -385,21 +383,10 @@ static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch)
>  }
>  
>  static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
> -	{
> -		.compatible = "renesas,usb2-phy-r8a7795",
> -		.data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
> -	},
> -	{
> -		.compatible = "renesas,usb2-phy-r8a7796",
> -		.data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
> -	},
> -	{
> -		.compatible = "renesas,usb2-phy-r8a77965",
> -		.data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
> -	},
> -	{
> -		.compatible = "renesas,rcar-gen3-usb2-phy",
> -	},
> +	{ .compatible = "renesas,usb2-phy-r8a7795" },
> +	{ .compatible = "renesas,usb2-phy-r8a7796" },
> +	{ .compatible = "renesas,usb2-phy-r8a77965" },
> +	{ .compatible = "renesas,rcar-gen3-usb2-phy" },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
> @@ -445,7 +432,8 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>  	if (of_usb_get_dr_mode_by_phy(dev->of_node, 0) == USB_DR_MODE_OTG) {
>  		int ret;
>  
> -		channel->uses_otg_pins = (uintptr_t)of_device_get_match_data(dev);
> +		channel->uses_otg_pins = !of_property_read_bool(dev->of_node,
> +							"renesas,no-otg-pins");
>  		channel->extcon = devm_extcon_dev_allocate(dev,
>  							rcar_gen3_phy_cable);
>  		if (IS_ERR(channel->extcon))
> -- 
> 1.9.1
>