Hi Heiko & Guenter,
On 2016/6/14 22:00, Heiko St?bner wrote:
> Am Dienstag, 14. Juni 2016, 06:50:31 schrieb Guenter Roeck:
>> On Tue, Jun 14, 2016 at 6:27 AM, Heiko St?bner <heiko at sntech.de> wrote:
>>> Am Montag, 13. Juni 2016, 10:10:10 schrieb Frank Wang:
>>>> The newer SoCs (rk3366, rk3399) take a different usb-phy IP block
>>>> than rk3288 and before, and most of phy-related registers are also
>>>> different from the past, so a new phy driver is required necessarily.
>>>>
>>>> Signed-off-by: Frank Wang <frank.wang at rock-chips.com>
>>>> ---
> [...]
>
>>>> +static int rockchip_usb2phy_init(struct phy *phy)
>>>> +{
>>>> + struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
>>>> + struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
>>>> + int ret;
>>>> +
>>>>
>>> if (!rport->port_cfg)
>>>
>>> return 0;
>>>
>>> Otherwise the currently empty otg-port will cause null-pointer
>>> dereferences
>>> when it gets assigned in the devicetree already.
>> Not really, at least not here - that port should not have port_id set
>> to USB2PHY_PORT_HOST.
>>
>> Does it even make sense to instantiate the otg port ? Is it going to
>> do anything without port configuration ?
> Ok, that would be the other option - not creating the phy in the driver.
Well, I will put this conditional inside *_host_port_init(), if it is an
empty, the phy-device should not be created.
Something like the following:
--- a/drivers/phy/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/phy-rockchip-inno-usb2.c
@@ -483,9 +483,13 @@ static int rockchip_usb2phy_host_port_init(struct
rockchip_usb2phy *rphy,
{
int ret;
- rport->port_id = USB2PHY_PORT_HOST;
rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_HOST];
+ if (!rport->port_cfg) {
+ dev_err(rphy->dev, "no host port-config provided.\n");
+ return -EINVAL;
+ }
+ rport->port_id = USB2PHY_PORT_HOST;
> Or from what I've seen, handling it as similar to the host-port should work
> initially as well most likely, supplying the additional otg-parts later on.
@Guenter, just as Heiko said, the otg-parts is not ready now, it will be
supplied later.
BR.
Frank
