linux-kernel - Re: [PATCH] phy: Add USB HSIC PHY driver for Marvell MMP3 SoC

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Date:   Sat, 14 Mar 2020 17:38:39 +0100
From:   Lubomir Rintel <lkundrak@...sk>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: Add USB HSIC PHY driver for Marvell MMP3 SoC

On Fri, Mar 13, 2020 at 04:52:00PM +0530, Kishon Vijay Abraham I wrote:
> Hi,
> 
> On 09/03/20 6:28 pm, Lubomir Rintel wrote:
> > Add PHY driver for the HSICs found on Marvell MMP3 SoC. The driver is
> > rather straightforward -- the PHY essentially just needs to be enabled.
> > 
> > Signed-off-by: Lubomir Rintel <lkundrak@...sk>
> > ---
> >  drivers/phy/marvell/Kconfig         | 12 +++++
> >  drivers/phy/marvell/Makefile        |  1 +
> >  drivers/phy/marvell/phy-mmp3-hsic.c | 82 +++++++++++++++++++++++++++++
> >  3 files changed, 95 insertions(+)
> >  create mode 100644 drivers/phy/marvell/phy-mmp3-hsic.c
> > 
...
> > diff --git a/drivers/phy/marvell/phy-mmp3-hsic.c b/drivers/phy/marvell/phy-mmp3-hsic.c
> > new file mode 100644
> > index 0000000000000..f7b430f6f6f05
> > --- /dev/null
> > +++ b/drivers/phy/marvell/phy-mmp3-hsic.c
...
> > +static const struct of_device_id mmp3_hsic_phy_of_match[] = {
> > +	{ .compatible = "marvell,mmp3-hsic-phy", },
> 
> Where is the binding documentation for this?

There's one in mainline:
Documentation/devicetree/bindings/phy/marvell,mmp3-hsic-phy.yaml

It got added just to document the compatible string at the time I thought 
usb-nop-xceiv would be sufficient to support the hardware.

It needs some fixing -- the "reset-gpios" shouldn't be there. I'll
follow up with a patch that removes it; please let me know if anything
else needs to be fixed there.

> Thanks
> Kishon

Thank you,
Lubo