From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaret Cantu Subject: [PATCH] ARM: dts: imx: b650v3: Calibrate USB PHY to pass eye diagram test Date: Wed, 14 Sep 2016 17:14:49 -0400 Message-ID: <1473887689-10792-1-git-send-email-jaret.cantu@timesys.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: shawnguo@kernel.org, kernel@pengutronix.de, fabio.estevam@nxp.com, robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org Calibrate the USB PHY TX settings to pass the eye diagram signal integrity test. The settings are taken from the i.MX6 reference manual's recommended configuration for USB certification (66.2.6). Signed-off-by: Jaret Cantu --- arch/arm/boot/dts/imx6q-b650v3.dts | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/dts/imx6q-b650v3.dts b/arch/arm/boot/dts/imx6q-b650v3.dts index 33cb71a..c266bd2 100644 --- a/arch/arm/boot/dts/imx6q-b650v3.dts +++ b/arch/arm/boot/dts/imx6q-b650v3.dts @@ -89,3 +89,9 @@ }; }; }; + +&usbphy1 { + fsl,tx-cal-45-dn-ohms = <55>; + fsl,tx-cal-45-dp-ohms = <55>; + fsl,tx-d-cal = <100>; +}; -- 1.7.10.4