usb: dwc2: Allow selection of data buffer size

[u-boot] / drivers / usb / host / Kconfig

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 90b2f78ec7d938dd8e3e2cd38fd4dee4c6b15e3e..a7249b7511f4552a74ac8431d6ffd41b0666c598 100644 (file)
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -245,3 +245,15 @@ config USB_DWC2
          Hi-Speed (480 Mbps), Full-Speed (12 Mbps), and Low-Speed (1.5 Mbps)
          operation is compliant to the controller Supplement. If you want to
          enable this controller in host mode, say Y.
+
+if USB_DWC2
+config USB_DWC2_BUFFER_SIZE
+       int "Data buffer size in kB"
+       default 64
+       ---help---
+         By default 64 kB buffer is used but if amount of RAM avaialble on
+         the target is not enough to accommodate allocation of buffer of
+         that size it is possible to shrink it. Smaller sizes should be fine
+         because larger transactions could be split in smaller ones.
+
+endif # USB_DWC2