[PATCH v3] ARM: zynq: DT: Add USB to device tree

On Mon, 2015-01-26 at 05:21PM +0100, Andreas F?rber wrote:

Am 26.01.2015 um 16:50 schrieb S?ren Brinkmann:

quoted

On Mon, 2015-01-26 at 10:35AM +0100, Andreas F?rber wrote:

quoted

Am 26.01.2015 um 09:33 schrieb Andreas F?rber:

quoted

Am 26.01.2015 um 09:23 schrieb Michal Simek:

quoted

On 01/26/2015 09:19 AM, Andreas F?rber wrote:

quoted

And if I apply it to my -next based tree, adding corresponding nodes to
zynq-parallella.dts, I get repeatedly:

[  +0,012242] ci_hdrc ci_hdrc.0: no of_node; not parsing pinctrl DT
[  +0,000157] ci_hdrc ci_hdrc.0: ChipIdea HDRC found, lpm: 0; cap:
f090e100 op: f090e140
[  +0,000081] platform ci_hdrc.0: Driver ci_hdrc requests probe deferral
[  +0,005360] ci_hdrc ci_hdrc.1: no of_node; not parsing pinctrl DT
[  +0,000120] ci_hdrc ci_hdrc.1: ChipIdea HDRC found, lpm: 0; cap:
f0910100 op: f0910140
[  +0,001810] platform ci_hdrc.1: Driver ci_hdrc requests probe deferral

Am I missing any other patches or config options?
(I do notice that the pinctrl v3 patch that got merged has a trivial bug
for usb0, for which I'll send a patch later on.)

Why is it deferred? Is it because of pinmuxing stuff?

No, happened without as well.

Looking at a different place in dmesg, I spot this:

[  +0,003988] usb_phy_generic phy0: GPIO lookup for consumer reset-gpios
[  +0,000012] usb_phy_generic phy0: using device tree for GPIO lookup
[  +0,000015] of_get_named_gpiod_flags: can't parse 'reset-gpios-gpios'
property
 of node '/phy0[0]'
[  +0,000013] of_get_named_gpiod_flags: can't parse 'reset-gpios-gpio'
property
of node '/phy0[0]'
[  +0,000010] usb_phy_generic phy0: using lookup tables for GPIO lookup
[  +0,000153] usb_phy_generic phy0: lookup for GPIO reset-gpios failed
[  +0,000012] usb_phy_generic phy0: Error requesting RESET GPIO
[  +0,004360] usb_phy_generic: probe of phy0 failed with error -2
[  +0,004991] usb_phy_generic phy1: GPIO lookup for consumer reset-gpios
[  +0,000012] usb_phy_generic phy1: using device tree for GPIO lookup
[  +0,000013] of_get_named_gpiod_flags: can't parse 'reset-gpios-gpios'
property
 of node '/phy1[0]'
[  +0,000013] of_get_named_gpiod_flags: can't parse 'reset-gpios-gpio'
property of node '/phy1[0]'
[  +0,000010] usb_phy_generic phy1: using lookup tables for GPIO lookup
[  +0,000012] usb_phy_generic phy1: lookup for GPIO reset-gpios failed
[  +0,000011] usb_phy_generic phy1: Error requesting RESET GPIO
[  +0,004337] usb_phy_generic: probe of phy1 failed with error -2

So, I guess the chipidea driver is deferring because the phys want a
property that neither me nor you are specifying? Would that be the two
MDIO pins 52 and 53 that would need to be specified?

Erm, scratch that last question - wrong PHY. Trying it resolved the
above phy errors but not the original problem. And so does an empty one:

@@ -99,11 +100,13 @@

        usb_phy0: phy0 {
                compatible = "usb-nop-xceiv";
+               reset-gpios = <>;
                #phy-cells = <0>;
        };

        usb_phy1: phy1 {
                compatible = "usb-nop-xceiv";
+               reset-gpios = <>;
                #phy-cells = <0>;
        };
 };

In my manuals and notes I can't find any GPIO being used as reset for
the USB PHYs. Any thoughts appreciated.

Such a connection is optional. The platform might rely on its reset
circuit, though it might not work for warm reboots.
I haven't looked at parallela docs, but if there is a schematic
available, that should tell you if/what is connected to the PHY reset
pin.

I do have the schematic, and the way I read it, only the on-board reset
button resets the PHYs.

Yet it looks as if usb-nop-xceiv insists on a reset-gpios above, no?
Does it work on your boards with linux-next?

I haven't re-tested it since I submitted the patches, but at that time
it worked. But I also didn't test USB with the pinctrl patches together.
I'll do some testing later today.

	Soren