Hi, On Thu, 2013-12-05 at 10:41 +0000, Mark Rutland wrote: > On Mon, Nov 18, 2013 at 12:54:37PM +0000, Ivan T. Ivanov wrote: > > Hi Mark, > > > > On Fri, 2013-11-15 at 16:38 +0000, Mark Rutland wrote: > > > On Tue, Nov 12, 2013 at 02:51:45PM +0000, Ivan T. Ivanov wrote: > > > > From: "Ivan T. Ivanov" <iivanov@xxxxxxxxxx> > > > > > > > > Allows MSM OTG controller to be specified via device tree. > > > > > > > > Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx> > > > > Cc: devicetree@xxxxxxxxxxxxxxx > > > > --- > > > > .../devicetree/bindings/usb/msm-hsusb.txt | 57 +++++++++++++- > > > > drivers/usb/phy/phy-msm-usb.c | 79 +++++++++++++++++--- > > > > 2 files changed, 124 insertions(+), 12 deletions(-) > > [...] > > > > > + > > > > +- dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg" > > > > > > If this has a default and thus isn't required, it should be listed as > > > optional. > > > > This is part of the standard USB bindings, Perhaps I could just > > refer to: Documentation/devicetree/bindings/usb/generic.txt > > That would be fine, but it should also be moved to the optional > properties section. Ok. > > > > > > > > > > > > + > > > > +- vdccx-supply: phandle to the regulator for the vdd supply for > > > > + digital circuit operation. > > > > +- v1p8-supply: phandle to the regulator for the 1.8V supply > > > > +- v3p3-supply: phandle to the regulator for the 3.3V supply > > > > + > > > > +- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of > > > > + 1 - PHY control > > > > + 2 - PMIC control > > > > + 3 - User control (via debugfs) > > > > > > NAK. This does not seem like a description of the hardware, and given > > > the debugfs comment is fundamentally tied to the way Linux functions > > > today. > > > > I will remove option 3, but rest are really property of the chipset. > > Can you elaborate on the diffence please? Difference is how VBUS, ID changes, Accessory and Charger detection is handled. In older chips-sets they are handled by PHY controller, while now they are handled by external PMIC logic. > > > > > > > > > > + > > > > +Optional properties: > > > > +- qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs > > > > + terminate with -1 > > > > > > What is this? I'm really not keen on having arbitrary register/memory > > > poking sequences in the dt. > > > > This is related Device Mode Eye Diagram test and values used could be > > different between chipsets. > > Ok. Then we should encode the tuning data rather than adding a mechanism > to allow for writes to arbitrary addresses. Currently: for msm8226 sequence is < 0x44 0x80 0x68 0x81 0x24 0x82 0x13 0x83 > for msm8974 sequence is < 0x63 0x81 > I could reserve -1 as "do not program" value and document that values in this array will be written to ULPI interface with ULPI_EXT_VENDOR_SPECIFIC as base address. for msm8974 sequence will be < -1 0x63 > > > > > > > > > > Why does it need to be terminated? Surely the size of the property tells > > > you that it's terminated. > > > > Yes. -1 termination could be done in driver. > > Please do. There's no need for it to be in the DT. Thanks. Ivan > > Cheers, > Mark. > -- > To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
