usb: dwc3: Set elastic buffer mode

Add a device tree property to allow setting the GUSB3PIPECTRL
Elastic Buffer Mode (bit 0). By default set the buffer to
half-full to work around SuperSpeed link errors. If the property
is set, set the buffer to be nominally empty.

This change is a combination of two previous commits:

	USB: dwc3: core: Set elastic buffer mode to zero

	Currently elastic buffer mode in GUSB3PIPE_CTRL(0) register is
	set to one. This results in high link error rates and superspeed
	mode transfer failures if VDDCX is at super turbo mode voltage
	1.05V. Hence set elastic buffer mode to zero in GUSB3PIP_CTRL
	register.

	usb: dwc3: Do not set half-full elastic buffer

	On some platforms setting of half-full elastic buffer will cause data
	corruption and hence we need to avoid this setting.

Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>

0 files changed, 0 insertions, 0 deletions