[PATCH 1/5] drivers: usb: phy: add a new driver for omap usb2 phy
ABRAHAM, KISHON VIJAY
kishon at ti.com
Tue Sep 25 06:06:20 EDT 2012
On Mon, Sep 24, 2012 at 6:45 PM, Rob Herring <robherring2 at gmail.com> wrote:
> On 09/06/2012 09:57 AM, Kishon Vijay Abraham I wrote:
>> All phy related programming like enabling/disabling the clocks, powering
>> on/off the phy is taken care of by this driver. It is also used for OTG
>> related functionality like srp.
>> This also includes device tree support for usb2 phy driver and
>> the documentation with device tree binding information is updated.
>> Currently writing to control module register is taken care in this
>> driver which will be removed once the control module driver is in place.
>> Cc: Felipe Balbi <balbi at ti.com>
>> Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
>> Documentation/devicetree/bindings/usb/usb-phy.txt | 17 ++
>> drivers/usb/phy/Kconfig | 9 +
>> drivers/usb/phy/Makefile | 1 +
>> drivers/usb/phy/omap-usb2.c | 271 +++++++++++++++++++++
>> include/linux/usb/omap_usb.h | 46 ++++
>> include/linux/usb/phy_companion.h | 34 +++
>> 6 files changed, 378 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/usb/usb-phy.txt
>> create mode 100644 drivers/usb/phy/omap-usb2.c
>> create mode 100644 include/linux/usb/omap_usb.h
>> create mode 100644 include/linux/usb/phy_companion.h
>> diff --git a/Documentation/devicetree/bindings/usb/usb-phy.txt b/Documentation/devicetree/bindings/usb/usb-phy.txt
>> new file mode 100644
>> index 0000000..80d4148
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/usb/usb-phy.txt
> This is a very generic name...
>> @@ -0,0 +1,17 @@
>> +USB PHY
>> +OMAP USB2 PHY
>> +Required properties:
>> + - compatible: Should be "ti,omap-usb2"
> ...for a specific phy. However, I do think a generic binding to describe
> host ctrlr to phy connections is needed.
>> + - reg : Address and length of the register set for the device. Also
>> +add the address of control module dev conf register until a driver for
>> +control module is added
> The dts should describe the h/w, not what you need for the current
> driver. The 2nd reg field does not belong here.
Indeed. This was discussed and agreed upon as a interim solution till
we have a control module driver in place to write to the control
>> +This is usually a subnode of ocp2scp to which it is connected.
> How is usb port to phy connection described?
Currently the usb controller to phy connection is established only by
type. We have a couple of patches being currently discussed in the
list to establish the connection by phandle.
https://patchwork.kernel.org/patch/1457801/ (Generic PHY Framework:
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