* [PATCH] ARM: dts: imx: b650v3: Calibrate USB PHY to pass eye diagram test
@ 2016-09-14 21:14 Jaret Cantu
2016-10-23 12:11 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Jaret Cantu @ 2016-09-14 21:14 UTC (permalink / raw)
To: linux-arm-kernel
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 <jaret.cantu@timesys.com>
---
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] ARM: dts: imx: b650v3: Calibrate USB PHY to pass eye diagram test
2016-09-14 21:14 [PATCH] ARM: dts: imx: b650v3: Calibrate USB PHY to pass eye diagram test Jaret Cantu
@ 2016-10-23 12:11 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2016-10-23 12:11 UTC (permalink / raw)
To: linux-arm-kernel
On Wed, Sep 14, 2016 at 05:14:49PM -0400, Jaret Cantu wrote:
> 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 <jaret.cantu@timesys.com>
Applied, thanks.
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