Hello.
On 01/22/2016 02:07 AM, Rob Herring wrote:
TI DaVinci MUSB driver equipped with DeviceTree support.
Tested with AM1808 board and USB2.0 (OTG) in host mode.
Signed-off-by: Petr Kulhavy <petr@xxxxxxxxx>
---
.../devicetree/bindings/usb/da8xx-usb.txt | 52 +++++++
drivers/usb/musb/da8xx.c | 166 +++++++++++++++++++++
include/linux/platform_data/usb-davinci.h | 3 +-
3 files changed, 220 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/usb/da8xx-usb.txt
diff --git a/Documentation/devicetree/bindings/usb/da8xx-usb.txt b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
new file mode 100644
index 0000000..c81d665
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
Follow the compatible string for the filename (with wildcards is fine).
@@ -0,0 +1,52 @@
+TI DaVinci MUSB
+
+Required properties:
+
+ - compatible : Should be "ti,da850-musb" or "ti,da830-musb"
+
+ - mode : USB mode. "1" signifies HOST, "2" represents PERIPHERAL,
+ "3" represents OTG.
Surely we have a similar property defined already. Don't create
something new.
Yes, there's "dr_mode" prop with string values.
+
+ - power : This signifies the maximum current the controller can
+ supply in host mode. The unit size is 2mA, the maximum value is 510mA.
You should model this as a regulator.
This is not a regulator, it's just a value, that's all about it...
+ - num-eps : Specifies the number of endpoints. This is also a
+ MUSB configuration-specific setting.
Just spell out endpoints.
What do you mean?
+
+ - multipoint : Should be "1" indicating the musb controller supports
+ multipoint. This is a MUSB configuration-specific setting.
What does multipoint mean?
Yeah, IU'd like to know that as well...
+ - ram-bits : Specifies the ram address size.
Needs a better description. Then it probably needs a better name too,
but without a description I can't tell what that would be.
Anyway, all these props are standard for MUSB, so shoiuld certainly
handled (and documeted?) in a generic MUSB function. There's absolutely no
point handling them in da8xx.c.
[...]
+ - da8xx,phy20-refclock-frequency : Integer. Defines the USB 2.0 PHY reference clock input
+ frequency in Hz in case the clock is generated by the internal PLL.
+ Supported values are 12MHz, 13MHz, 19.2MHz, 20MHz, 24MHz, 26MHz, 38.4MHz, 40MHz, 48MHz
da8xx is not a vendor.
Yeah, "ti," should be used instead.
Rob
MBR, Sergei
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