linux-kernel - Re: [PATCH v3 2/3] usb: phy: Add Qualcomm SS-USB and HS-USB drivers for DWC3 core

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Message-ID: <20130814142056.GB2673@joshc>
Date:	Wed, 14 Aug 2013 09:20:56 -0500
From:	Josh Cartwright <joshc@...eaurora.org>
To:	"Ivan T. Ivanov" <iivanov@...sol.com>
Cc:	balbi@...com, rob.herring@...xeda.com, pawel.moll@....com,
	mark.rutland@....com, swarren@...dotorg.org,
	ian.campbell@...rix.com, rob@...dley.net,
	gregkh@...uxfoundation.org, grant.likely@...aro.org,
	idos@...eaurora.org, mgautam@...eaurora.org,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v3 2/3] usb: phy: Add Qualcomm SS-USB and HS-USB drivers
 for DWC3 core

On Wed, Aug 14, 2013 at 03:59:42PM +0300, Ivan T. Ivanov wrote:
> From: "Ivan T. Ivanov" <iivanov@...sol.com>
> 
> These drivers handles control and configuration of the HS
> and SS USB PHY transceivers. They are part of the driver
> which manage Synopsys DesignWare USB3 controller stack
> inside Qualcomm SoC's.
> 
> Signed-off-by: Ivan T. Ivanov <iivanov@...sol.com>
> ---
[..]
> diff --git a/drivers/usb/phy/phy-msm-dwc3-hs.c b/drivers/usb/phy/phy-msm-dwc3-hs.c
> new file mode 100644
> index 0000000..465a8f5
> --- /dev/null
> +++ b/drivers/usb/phy/phy-msm-dwc3-hs.c
[..]
> +
> +struct msm_dwc3_hs_phy {
> +	struct usb_phy		phy;
> +	void __iomem		*base;
> +	struct device		*dev;
> +
> +	struct clk		*xo_clk;
> +	struct clk		*sleep_a_clk;
> +
> +	struct regulator	*v3p3;
> +	struct regulator	*v1p8;
> +	struct regulator	*vddcx;
> +	struct regulator	*vbus;
> +};
> +
> +#define	phy_to_dwc3_phy(x)	container_of((x), struct msm_dwc3_hs_phy, phy)
> +
> +
> +/**
> + *
> + * Write register with debug info.

what debug info?

> + *
> + * @base - DWC3 base virtual address.
> + * @offset - register offset.
> + * @val - value to write.
> + *
> + */
> +static inline void msm_dwc3_hs_write(void *base, u32 offset, u32 val)

You've dropped __iomem here; have you run through sparse?

> +{
> +	iowrite32(val, base + offset);
> +}
> +
> +/**
> + * Write register and read back masked value to confirm it is written
> + *
> + * @base - DWC3 base virtual address.
> + * @offset - register offset.
> + * @mask - register bitmask specifying what should be updated
> + * @val - value to write.
> + *
> + */
> +static inline void msm_dwc3_hs_write_readback(void *base, u32 offset,
> +					    const u32 mask, u32 val)
> +{

Same comment here.

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