linux-kernel - Re: [PATCH] usb: phy: generic: make vcc regulator optional

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Message-ID: <c7c34f0c-5403-c85d-f092-09b0ca5ae9d2@pengutronix.de>
Date:   Thu, 12 Jan 2023 18:25:53 +0100
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Sascha Hauer <s.hauer@...gutronix.de>, linux-usb@...r.kernel.org
Cc:     Felipe Balbi <balbi@...nel.org>, Mark Brown <broonie@...nel.org>,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: Re: [PATCH] usb: phy: generic: make vcc regulator optional

On 12.10.22 15:27, Sascha Hauer wrote:
> phy-generic uses the existance of the property "vcc-supply" to see if a
> regulator is optional or not. Use devm_regulator_get_optional() instead
> which exists for this purpose. Using devm_regulator_get_optional()
> avoids "supply vcc not found, using dummy regulator" messages.

Gentle ping.

> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> ---
>  drivers/usb/phy/phy-generic.c | 14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/usb/phy/phy-generic.c b/drivers/usb/phy/phy-generic.c
> index 34b9f81401871..92d3e067067c6 100644
> --- a/drivers/usb/phy/phy-generic.c
> +++ b/drivers/usb/phy/phy-generic.c
> @@ -209,7 +209,7 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop)
>  	int err = 0;
>  
>  	u32 clk_rate = 0;
> -	bool needs_vcc = false, needs_clk = false;
> +	bool needs_clk = false;
>  
>  	if (dev->of_node) {
>  		struct device_node *node = dev->of_node;
> @@ -217,7 +217,6 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop)
>  		if (of_property_read_u32(node, "clock-frequency", &clk_rate))
>  			clk_rate = 0;
>  
> -		needs_vcc = of_property_read_bool(node, "vcc-supply");
>  		needs_clk = of_property_read_bool(node, "clocks");
>  	}
>  	nop->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
> @@ -260,13 +259,10 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop)
>  		}
>  	}
>  
> -	nop->vcc = devm_regulator_get(dev, "vcc");
> -	if (IS_ERR(nop->vcc)) {
> -		dev_dbg(dev, "Error getting vcc regulator: %ld\n",
> -					PTR_ERR(nop->vcc));
> -		if (needs_vcc)
> -			return -EPROBE_DEFER;
> -	}
> +	nop->vcc = devm_regulator_get_optional(dev, "vcc");
> +	if (IS_ERR(nop->vcc) && PTR_ERR(nop->vcc) != -ENODEV)
> +		return dev_err_probe(dev, PTR_ERR(nop->vcc),
> +				     "could not get vcc regulator\n");
>  
>  	nop->vbus_draw = devm_regulator_get_exclusive(dev, "vbus");
>  	if (PTR_ERR(nop->vbus_draw) == -ENODEV)

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