From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Date: Sat, 15 Jun 2013 23:25:34 +0200 Subject: [U-Boot] [PATCH v2 1/3] ARM: Tegra: FDT: Add USB EHCI function for T30/T114 In-Reply-To: <1371206502-6031-1-git-send-email-jilin@nvidia.com> References: <1371206502-6031-1-git-send-email-jilin@nvidia.com> Message-ID: <20130615212534.GA19169@manwe> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Fri, Jun 14, 2013 at 06:41:40PM +0800, Jim Lin wrote: [...] > diff --git a/board/nvidia/dts/tegra30-beaver.dts b/board/nvidia/dts/tegra30-beaver.dts [...] > @@ -68,4 +69,9 @@ > status = "okay"; > bus-width = <8>; > }; > + > + usb at 7d008000 { > + nvidia,vbus-gpio = <&gpio 61 3>; /* PH5, USB13_VBUS_PULLUP */ This doesn't work for me on Beaver. I need to turn the above line into this: nvidia,vbus-gpio = <&gpio 236 0>; /* PDD4 */ PDD4 is the correct GPIO according to the schematics and the pin is high-active. Also as far as I can tell, 3 is not a meaningful value for the U-Boot GPIO bindings. Only the value 1 (low-active) is used. With that change applied on top of your patches I can see that a USB flash drive connected to USB3 is indeed powered. However I noticed something strange. When I try to use USB, I get this: Tegra30 (Beaver) # usb start (Re)start USB... USB0: set_host_mode: GPIO 236 high USB EHCI 1.00 scanning bus 0 for devices... 1 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found scanning usb for ethernet devices... 0 Ethernet Device(s) found So no storage device is detected, even though a USB flash drive is connected and powered properly. If I repeat the same command, however, the storage device is detected: Tegra30 (Beaver) # usb reset (Re)start USB... USB0: set_host_mode: GPIO 236 high USB EHCI 1.00 scanning bus 0 for devices... 2 USB Device(s) found scanning usb for storage devices... 1 Storage Device(s) found scanning usb for ethernet devices... 0 Ethernet Device(s) found Any idea what might be going on here? Thierry -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 836 bytes Desc: not available URL: