linux-kernel - Re: [PATCH 5/8] phy: renesas: rcar-gen3-usb2: unify OBINTEN handling

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Date:   Tue, 25 Sep 2018 09:24:16 +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 5/8] phy: renesas: rcar-gen3-usb2: unify OBINTEN handling

On Fri, Sep 21, 2018 at 08:53:21PM +0900, Yoshihiro Shimoda wrote:
> This patch unifies the OBINTEN handling to clean-up the code.
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>

The nit below notwithstanding.

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

> ---
>  drivers/phy/renesas/phy-rcar-gen3-usb2.c | 23 +++++++++++++++--------
>  1 file changed, 15 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> index 856056e..e7eaed9 100644
> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> @@ -142,6 +142,18 @@ static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus)
>  	writel(val, usb2_base + USB2_ADPCTRL);
>  }
>  
> +static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable)
> +{

nit: Perhaps bool would be a better type for the enable parameter.

> +	void __iomem *usb2_base = ch->base;
> +	u32 val = readl(usb2_base + USB2_OBINTEN);
> +
> +	if (enable)
> +		val |= USB2_OBINT_BITS;
> +	else
> +		val &= ~USB2_OBINT_BITS;
> +	writel(val, usb2_base + USB2_OBINTEN);
> +}
> +
>  static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch)
>  {
>  	rcar_gen3_set_linectrl(ch, 1, 1);
> @@ -187,16 +199,12 @@ static void rcar_gen3_init_for_a_peri(struct rcar_gen3_chan *ch)
>  
>  static void rcar_gen3_init_from_a_peri_to_a_host(struct rcar_gen3_chan *ch)
>  {
> -	void __iomem *usb2_base = ch->base;
> -	u32 val;
> -
> -	val = readl(usb2_base + USB2_OBINTEN);
> -	writel(val & ~USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
> +	rcar_gen3_control_otg_irq(ch, 0);
>  
>  	rcar_gen3_enable_vbus_ctrl(ch, 1);
>  	rcar_gen3_init_for_host(ch);
>  
> -	writel(val | USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
> +	rcar_gen3_control_otg_irq(ch, 1);
>  }
>  
>  static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch)
> @@ -286,8 +294,7 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
>  	val = readl(usb2_base + USB2_VBCTRL);
>  	writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
>  	writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTSTA);
> -	val = readl(usb2_base + USB2_OBINTEN);
> -	writel(val | USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
> +	rcar_gen3_control_otg_irq(ch, 1);
>  	val = readl(usb2_base + USB2_ADPCTRL);
>  	writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL);
>  	val = readl(usb2_base + USB2_LINECTRL1);
> -- 
> 1.9.1
>