The Raspberry Pi Zero also supports OTG mode. So provide a dtsi file
to configure the USB interface accordingly. The fifo sizes are optimized
for device endpoint 6 and 7 with the maximum of 768.
Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
---
arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi | 10 ++++++++++
1 file changed, 10 insertions(+)
create mode 100644 arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi
diff --git a/arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi b/arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi
new file mode 100644
index 0000000..e7d217c
--- /dev/null
+++ b/arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi
@@ -0,0 +1,10 @@
+&usb {
+ dr_mode = "otg";
+ g-rx-fifo-size = <256>;
+ g-np-tx-fifo-size = <32>;
+ /*
+ * According to dwc2 the sum of all device EP
+ * fifo sizes shouldn't exceed 3776 bytes.
+ */
+ g-tx-fifo-size = <256 256 512 512 512 768 768>;
+};
--
2.7.4
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