usb: dwc2: reset dwc2 core before dwc2_get_hwparams()

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We initiate dwc2 usb controller in BIOS, dwc2_core_reset() should
be called before dwc2_get_hwparams() to reset core registers to
default value. Without this the FIFO setting might be incorrect
because calculating FIFO size need power-on value of
GRXFSIZ/GNPTXFSIZ/HPTXFSIZ registers.

This patch could avoid warnning massage like in rk3288 platform:
[    2.074764] dwc2 ff580000.usb: 256 invalid for
host_perio_tx_fifo_size. Check HW configuration.

Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

...

This commit is contained in:

Yunzhi Li 2015-12-17 11:14:26 -08:00 • committed by Felipe Balbi

parent 991824677f

commit cebfdbf329

3 changed files with 8 additions and 1 deletions

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2

drivers/usb/dwc2/core.c

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1

drivers/usb/dwc2/core.h

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6

drivers/usb/dwc2/platform.c

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