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

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Message-ID: <cf9537d3-3b86-aa23-74fe-9cd49987c845@wanyeetech.com>
Date:   Wed, 23 Sep 2020 21:52:10 +0800
From:   Zhou Yanjie <zhouyanjie@...yeetech.com>
To:     Vinod Koul <vkoul@...nel.org>
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.

Hello Vinod,

在 2020/9/23 下午1:35, Vinod Koul 写道:
> 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.


Sure.

>> +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


Sure.

Thanks and best regards!