From 6b6a0c9a3ffa3107994d92d5758cbe274c5a97b6 Mon Sep 17 00:00:00 2001 From: Huang Rui Date: Fri, 31 Oct 2014 11:11:12 +0800 Subject: usb: dwc3: add Tx de-emphasis quirk This patch adds Tx de-emphasis quirk, and the Tx de-emphasis value is configurable according to PIPE3 specification. Value Description 0 -6dB de-emphasis 1 -3.5dB de-emphasis 2 No de-emphasis 3 Reserved It can be configured on DT or platform data. Signed-off-by: Huang Rui Signed-off-by: Felipe Balbi --- Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation/devicetree/bindings/usb') diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 1ecc33315e1f..b724b2e78549 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -29,6 +29,9 @@ Optional properties: - snps,lfps_filter_quirk: when set core will filter LFPS reception. - snps,rx_detect_poll_quirk: when set core will disable a 400us delay to start Polling LFPS after RX.Detect. + - snps,tx_de_emphasis_quirk: when set core will set Tx de-emphasis value. + - snps,tx_de_emphasis: the value driven to the PHY is controlled by the + LTSSM during USB3 Compliance mode. This is usually a subnode to DWC3 glue to which it is connected. -- cgit v1.2.3