Re: [PATCH v2] phy: Renesas R-Car Gen2 PHY driver

[Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>]

Hello.

On 10-04-2014 23:53, Sergei Shtylyov wrote:

>> On Wednesday 09 April 2014 03:14 AM, Sergei Shtylyov wrote:
>>> This PHY, though formally being a part of Renesas USBHS controller,
>>> contains the
>>> UGCTRL2 register that controls multiplexing of the USB ports (Renesas calls
>>> them
>>> channels) to the different USB controllers: channel 0 can be connected to
>>> either
>>> PCI EHCI/OHCI or USBHS controllers, channel 2 can be connected to PCI
>>> EHCI/OHCI
>>> or xHCI controllers.

>>> This is a new driver for this USB PHY currently already supported under
>>> drivers/
>>> usb/phy/. The reason for writing the new driver was the requirement that the
>>> multiplexing of USB channels to the controller be dynamic, depending on what
>>> USB drivers are loaded,  rather than static as provided by the old driver.

[...]

>>> The infrastructure provided by drivers/phy/phy-core.c seems to fit that
>>> purpose
>>> ideally. The new driver only supports device tree probing for now.

>>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

[...]

>>> Index: linux-phy/drivers/phy/phy-rcar-gen2.c
>>> =================================>>> --- /dev/null
>>> +++ linux-phy/drivers/phy/phy-rcar-gen2.c
>>> @@ -0,0 +1,287 @@

[...]

>>> +static struct phy_ops rcar_gen2_phy_ops = {
>>> +    .init        = rcar_gen2_phy_init,
>>> +    .exit        = rcar_gen2_phy_exit,
>>> +    .owner        = THIS_MODULE,
>>> +};
>>> +
>>> +static struct phy_ops rcar_gen2_usbhs_phy_ops = {
>>> +    .init        = rcar_gen2_phy_init,
>>> +    .exit        = rcar_gen2_phy_exit,
>>> +    .power_on    = rcar_gen2_usbhs_phy_power_on,
>>> +    .power_off    = rcar_gen2_usbhs_phy_power_off,
>>> +    .owner        = THIS_MODULE,
>>> +};

>> Let's not create multiple phy_ops for a single driver.

>     Unfortunately, I have to because not all PHYs are equal.

    OK, actually I can do without extra 'struct phy_ops'. I just figured that 
out a bit late...

WBR, Sergei