Hello.
On 06/09/2014 03:44 PM, Laurent Pinchart wrote:
Thank you for the patch.
Could you please remove the parts of the patch to which you didn't reply?
I've hardly found your comment.
On Saturday 24 May 2014 02:06:03 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@xxxxxxxxxxxxxxxxxx>
[...]
Index: linux-phy/Documentation/devicetree/bindings/phy/rcar-gen2-phy.txt
===================================================================
--- /dev/null
+++ linux-phy/Documentation/devicetree/bindings/phy/rcar-gen2-phy.txt
@@ -0,0 +1,60 @@
+* Renesas R-Car generation 2 USB PHY
+
+This file provides information on what the device node for the R-Car
generation +2 USB PHY contains.
+
+Required properties:
+- compatible: "renesas,usb-phy-r8a7790" if the device is a part of R8A7790
SoC. + "renesas,usb-phy-r8a7791" if the device is a part of R8A7791
SoC. +- reg: offset and length of the register block.
+- #phy-cells: see phy-bindings.txt in the same directory, must be 2.
+- clocks: clock phandle and specifier pair.
+- clock-names: string, clock input name, must be "usbhs".
Is that the functional clock for the PHY ? If so, what about naming it "fck"
(or something similar) ?
No, it's the clock for the USBHS controller to which this PHY belongs.
WBR, Sergei
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