Re: [PATCH v3 5/6] ARM: dts: omap: update usb_otg_hs data

From: kishon
Date: Thu Mar 21 2013 - 02:24:06 EST


On Thursday 21 March 2013 02:29 AM, Stephen Warren wrote:
On 03/20/2013 03:12 AM, Kishon Vijay Abraham I wrote:
Updated the usb_otg_hs dt data to include the *phy* and *phy-names*
binding in order for the driver to use the new generic PHY framework.
Also updated the Documentation to include the binding information.

diff --git a/Documentation/devicetree/bindings/usb/omap-usb.txt b/Documentation/devicetree/bindings/usb/omap-usb.txt
index abce256..3d6f9f6 100644
--- a/Documentation/devicetree/bindings/usb/omap-usb.txt
+++ b/Documentation/devicetree/bindings/usb/omap-usb.txt
@@ -19,6 +19,9 @@ OMAP MUSB GLUE
- power : Should be "50". This signifies the controller can supply upto
100mA when operating in host mode.
- usb-phy : the phandle for the PHY device
+ - phy : the phandle for the PHY device (used by generic PHY framework)
+ - phy-names : the names of the PHY corresponding to the PHYs present in the
+ *phy* phandle.

If the intent is for those properties to be generic and used by any DT
binding that refers to a PHY node, I think you'd want to define those
properties in e.g. Documentation/devicetree/bindings/phy/phy.txt, just
like common clock/GPIO/... properties are defined in standalone common

Ok. Will add it.

I think you want to require that DT nodes that represent PHYs have a
#phy-cells property, and that the format of the phy property be
<&phy_phandle phy_specifier*>, where #phy-cells in the referenced node
defines how many cells are part of phy_specifier*, just like (almost)
any other DT property that references another node by phandle. That way,
if a single DT node represents a HW block that implements e.g. 3 PHYs,
it can use #phy-cells = <1>, and the referencing phy property can
include a cell that indicates which of those 3 PHYs is being referenced.

Currently, if a single phandle have reference to multiple PHYs, we can get PHY by passing index or by name as give in phy-names.
I'm not sure if we have <&phy_phandle phy_specifier*>, what could that phy_specifier be? Maybe phy_type?

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