From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Sun, 21 May 2017 16:44:36 +0000 (+0200)
Subject: ARM: dts: bcm283x: Add dtsi for OTG mode
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1aa1d858f582c7b1c245e8990ab21e1d9d8d00b1;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ARM: dts: bcm283x: Add dtsi for OTG mode

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@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
---

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 000000000000..e7d217c967a1
--- /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>;
+};