From 00102ae52055e294ac37ae1380f37620f4a8bb26 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Wed, 27 Mar 2019 20:03:39 -0300 Subject: pico-imx7d: README: Recommend the usage of a USB hub Since commit 9e3c0174da842 ("pico-imx7d: Add LCD support") we started to notice some hangs in U-Boot. There is not an issue on such commit per se, but due to the LCD support the current drawn is increased and this may cause issues when powering pico-imx7d-pi from USB. Some computers may be a bit strict with USB current draw and will shut down their ports if the draw is too high. The solution for that is to use an externally powered USB hub between the board and the host computer. Add such recommendation to the README file. Signed-off-by: Fabio Estevam --- board/technexion/pico-imx7d/README | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'board/technexion') diff --git a/board/technexion/pico-imx7d/README b/board/technexion/pico-imx7d/README index 24eb97e82c..f21d8301cb 100644 --- a/board/technexion/pico-imx7d/README +++ b/board/technexion/pico-imx7d/README @@ -26,6 +26,10 @@ Connect a USB to serial adapter between the host PC and pico. Connect a USB cable between the OTG pico port and the host PC. +Note: Some computers may be a bit strict with USB current draw and will +shut down their ports if the draw is too high. The solution for that is +to use an externally powered USB hub between the board and the host computer. + Open a terminal program such as minicom. Copy SPL and u-boot.img to the imx_usb_loader folder. -- cgit