linux-kernel - Re: [PATCH v5 2/2] PHY: Ingenic: Add USB PHY driver using generic PHY framework.

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Date:   Wed, 23 Sep 2020 11:05:00 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     周琰杰 (Zhou Yanjie) 
        <zhouyanjie@...yeetech.com>
Cc:     balbi@...nel.org, gregkh@...uxfoundation.org, kishon@...com,
        paul@...pouillou.net, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, christophe.jaillet@...adoo.fr,
        dongsheng.qiu@...enic.com, aric.pzqi@...enic.com,
        rick.tyliu@...enic.com, yanfei.li@...enic.com,
        sernia.zhou@...mail.com, zhenwenjin@...il.com
Subject: Re: [PATCH v5 2/2] PHY: Ingenic: Add USB PHY driver using generic
 PHY framework.

On 22-09-20, 00:24, 周琰杰 (Zhou Yanjie) wrote:

> +#define USBPCR_IDPULLUP_LSB	28
> +#define USBPCR_IDPULLUP_MASK		GENMASK(29, USBPCR_IDPULLUP_LSB)
> +#define USBPCR_IDPULLUP_ALWAYS		(0x2 << USBPCR_IDPULLUP_LSB)
> +#define USBPCR_IDPULLUP_SUSPEND		(0x1 << USBPCR_IDPULLUP_LSB)
> +#define USBPCR_IDPULLUP_OTG			(0x0 << USBPCR_IDPULLUP_LSB)

why not define these as 0, 1, 2 and then use
FIELD_PREP(value, USBPCR_IDPULLUP_MASK), please do this for rest as
well.

> +static int ingenic_usb_phy_set_mode(struct phy *phy,
> +				  enum phy_mode mode, int submode)
> +{
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
> +	u32 reg;
> +
> +	switch (mode) {
> +	case PHY_MODE_USB_HOST:
> +		reg = readl(priv->base + REG_USBPCR_OFFSET);
> +		reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE);

use u32_encode_bits or u32p_replace_bit to program registers using mask
defined
-- 
~Vinod