linux-kernel - Re: [PATCH v5 2/2] phy: bcm63xx-usbh: Add BCM63xx USBH driver

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Date:   Mon, 13 Jul 2020 11:21:22 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Álvaro Fernández Rojas <noltari@...il.com>
Cc:     simon@...e.lp0.eu, jonas.gorski@...il.com, kishon@...com,
        robh+dt@...nel.org, f.fainelli@...il.com,
        bcm-kernel-feedback-list@...adcom.com, p.zabel@...gutronix.de,
        krzk@...nel.org, gregkh@...uxfoundation.org, alcooperx@...il.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 2/2] phy: bcm63xx-usbh: Add BCM63xx USBH driver

On 19-06-20, 12:00, Álvaro Fernández Rojas wrote:
> Add BCM63xx USBH PHY driver for BMIPS.
> 
> Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
> ---
>  v5: use devm_reset_control_get_exclusive.
>  v4: several improvements:
>   - Use devm_platform_ioremap_resource.
>   - Code cleanups.
>   - Improve device mode config:
>     - Move USBH_SWAP_CONTROL device mode value to variant variable.
>     - Set USBH_UTMI_CONTROL1 register value (variant variable).
>  v3: introduce changes suggested by Florian:
>   - Add support for device mode.
>  v2: introduce changes suggested by Florian:
>   - Drop OF dependency (use device_get_match_data).
>   - Drop __initconst from variant tables.
>   - Use devm_clk_get_optional.
> 
>  drivers/phy/broadcom/Kconfig            |   9 +
>  drivers/phy/broadcom/Makefile           |   1 +
>  drivers/phy/broadcom/phy-bcm63xx-usbh.c | 457 ++++++++++++++++++++++++
>  3 files changed, 467 insertions(+)
>  create mode 100644 drivers/phy/broadcom/phy-bcm63xx-usbh.c
> 
> diff --git a/drivers/phy/broadcom/Kconfig b/drivers/phy/broadcom/Kconfig
> index b29f11c19155..a7889df8c541 100644
> --- a/drivers/phy/broadcom/Kconfig
> +++ b/drivers/phy/broadcom/Kconfig
> @@ -2,6 +2,15 @@
>  #
>  # Phy drivers for Broadcom platforms
>  #
> +config PHY_BCM63XX_USBH
> +	tristate "BCM63xx USBH PHY driver"
> +	depends on BMIPS_GENERIC || COMPILE_TEST
> +	select GENERIC_PHY
> +	default BMIPS_GENERIC

you depend on BMIPS_GENERIC and also use as default?

> +static int __init bcm63xx_usbh_phy_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct bcm63xx_usbh_phy	*usbh;
> +	const struct bcm63xx_usbh_phy_variant *variant;
> +	struct phy *phy;
> +	struct phy_provider *phy_provider;
> +
> +	usbh = devm_kzalloc(dev, sizeof(*usbh), GFP_KERNEL);
> +	if (!usbh)
> +		return -ENOMEM;
> +
> +	variant = device_get_match_data(dev);
> +	if (!variant)
> +		return -EINVAL;
> +	usbh->variant = variant;
> +
> +	usbh->base = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(usbh->base))
> +		return PTR_ERR(usbh->base);
> +
> +	usbh->reset = devm_reset_control_get_exclusive(dev, NULL);
> +	if (IS_ERR(usbh->reset)) {
> +		if (PTR_ERR(usbh->reset) != -EPROBE_DEFER)
> +			dev_err(dev, "failed to get reset\n");
> +		return PTR_ERR(usbh->reset);
> +	}
> +
> +	usbh->usbh_clk = devm_clk_get_optional(dev, "usbh");
> +	if (IS_ERR(usbh->usbh_clk))
> +		return PTR_ERR(usbh->usbh_clk);
> +
> +	usbh->usb_ref_clk = devm_clk_get_optional(dev, "usb_ref");
> +	if (IS_ERR(usbh->usb_ref_clk))
> +		return PTR_ERR(usbh->usb_ref_clk);
> +
> +	phy = devm_phy_create(dev, NULL, &bcm63xx_usbh_phy_ops);
> +	if (IS_ERR(phy)) {
> +		dev_err(dev, "failed to create PHY\n");
> +		return PTR_ERR(phy);
> +	}
> +
> +	platform_set_drvdata(pdev, usbh);
> +	phy_set_drvdata(phy, usbh);
> +
> +	phy_provider = devm_of_phy_provider_register(dev,
> +						     bcm63xx_usbh_phy_xlate);
> +	if (IS_ERR(phy_provider)) {
> +		dev_err(dev, "failed to register PHY provider\n");
> +		return PTR_ERR(phy_provider);
> +	}
> +
> +	dev_info(dev, "Registered BCM63xx USB PHY driver\n");

debug level?
-- 
~Vinod