Merge tag 'usb-ci-v4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-next

Peter writes:

USB: chipidea updates for v4.3-rc1

The main changes are adding several system interfaces for
tuning performance, and each vendors can adjust them according
to their design configurations.

Others are tiny improvements, like more well siTD supports,
USB_DEVICE_A_HNP_SUPPORT supports, etc.

1 files changed, 20 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index 553e2fae3a76..d71ef07bca5d 100644
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -30,6 +30,21 @@ Optional properties:
   argument that indicate usb controller index
 - disable-over-current: (FSL only) disable over current detect
 - external-vbus-divider: (FSL only) enables off-chip resistor divider for Vbus
+- itc-setting: interrupt threshold control register control, the setting
+  should be aligned with ITC bits at register USBCMD.
+- ahb-burst-config: it is vendor dependent, the required value should be
+  aligned with AHBBRST at SBUSCFG, the range is from 0x0 to 0x7. This
+  property is used to change AHB burst configuration, check the chipidea
+  spec for meaning of each value. If this property is not existed, it
+  will use the reset value.
+- tx-burst-size-dword: it is vendor dependent, the tx burst size in dword
+  (4 bytes), This register represents the maximum length of a the burst
+  in 32-bit words while moving data from system memory to the USB
+  bus, changing this value takes effect only the SBUSCFG.AHBBRST is 0.
+- rx-burst-size-dword: it is vendor dependent, the rx burst size in dword
+  (4 bytes), This register represents the maximum length of a the burst
+  in 32-bit words while moving data from the USB bus to system memory,
+  changing this value takes effect only the SBUSCFG.AHBBRST is 0.
 
 Example:
 
@@ -41,4 +56,9 @@ Example:
 		phys = <&usb_phy0>;
 		phy-names = "usb-phy";
 		vbus-supply = <&reg_usb0_vbus>;
+		gadget-itc-setting = <0x4>; /* 4 micro-frames */
+		 /* Incremental burst of unspecified length */
+		ahb-burst-config = <0x0>;
+		tx-burst-size-dword = <0x10>; /* 64 bytes */
+		rx-burst-size-dword = <0x10>;
 	};