Re: [PATCH v4 2/3] phy: rcar-gen3-usb2: change the mode to OTG on the combined channel

[Khiem Nguyen]

Hi Kishon,

On 10/17/2015 8:48 AM, Kishon Vijay Abraham I wrote:
> Hi,
>
> On Tuesday 13 October 2015 03:52 PM, Yoshihiro Shimoda wrote:
> > To use the channel 0 of R-Car gen3 as periperal mode, This patch changes
> > the mode to OTG instead of HOST. Then, this driver needs to set some
> > registers to enable host mode and detects ID pin and VBUS pin at
> > phy_init() timing.
> >
> > For now, the channel 0 can be used as host mode only.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> > ---
> >   drivers/phy/phy-rcar-gen3-usb2.c | 126 ++++++++++++++++++++++++++++++++++++++-
> >   1 file changed, 124 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
> > index d90dfcf..03d7079 100644
> > --- a/drivers/phy/phy-rcar-gen3-usb2.c
> > +++ b/drivers/phy/phy-rcar-gen3-usb2.c

[ .... ] snip

> > +
> > +	dev_dbg(&ch->phy->dev, "%s: %08x, %d\n", __func__, tmp, host);
>
> This shoulod be dev_vdbg.

I guess using dev_dbg() is equivalent.

I searched in same directory (drivers/phy) and the number of drivers 
using dev_vdbg() are just few drivers. (in my search, only 3 drivers). 
Other drivers use dev_dbg().
The last driver using dev_dbg was from Jan 2015.
I also recognized that dev_vdbug was used mostly in USB drivers...

Is it your favorite way or is there any good point of using dev_vdbg() ?

> > +	if (host)
> > +		tmp &= ~USB2_COMMCTRL_OTG_PERI;
> > +	else
> > +		tmp |= USB2_COMMCTRL_OTG_PERI;
> > +	writel(tmp, usb2_base + USB2_COMMCTRL);
> > +}
> > +
> > +static void rcar_gen3_set_linectrl(struct rcar_gen3_chan *ch, int dp, int dm)
> > +{
> > +	void __iomem *usb2_base = ch->usb2.base;
> > +	u32 tmp = readl(usb2_base + USB2_LINECTRL1);
> > +
> > +	dev_dbg(&ch->phy->dev, "%s: %08x, %d, %d\n", __func__, tmp, dp, dm);
>
> same here.

[.....] snip
> Thanks
> Kishon
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