Expand the generic part about kwboot to the mvebu page and advertise the parameter -n to make it simpler to boot some machines. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> --- Documentation/boards/mvebu.rst | 5 ++++- Documentation/boards/mvebu/Netgear-ReadyNAS-2120.rst | 13 ++----------- 2 files changed, 6 insertions(+), 12 deletions(-) diff --git a/Documentation/boards/mvebu.rst b/Documentation/boards/mvebu.rst index 4dfdc4a8f761..18a5c150bb95 100644 --- a/Documentation/boards/mvebu.rst +++ b/Documentation/boards/mvebu.rst @@ -35,7 +35,10 @@ Booting from UART ----------------- The mvebu SoCs support booting from UART. For this there is a tool available in -barebox called kwboot. +barebox called ``kwboot``. Quite some mvebu boards are reset once more when +they already started to read the first block of the image to boot. If you want +to boot such a board, use the parameter ``-n 15`` for ``kwboot``. (The number +might have to be adapted per board.) mvebu boards ------------ diff --git a/Documentation/boards/mvebu/Netgear-ReadyNAS-2120.rst b/Documentation/boards/mvebu/Netgear-ReadyNAS-2120.rst index 5bee03af9d38..488af2d7acfe 100644 --- a/Documentation/boards/mvebu/Netgear-ReadyNAS-2120.rst +++ b/Documentation/boards/mvebu/Netgear-ReadyNAS-2120.rst @@ -6,14 +6,5 @@ This is a rack mountable 4 bay NAS using an Armada XP dual-core processor. UART booting ------------ -The first UART hides behind a sticker on 4 pins. - -The machine seems to do two resets at power on which makes UART booting hard. A -trick to work around this is:: - - scripts/kwboot -d /dev/ttyUSB0; kwboot -b images/barebox-netgear-rn2120.img -t /dev/ttyUSB0 - -This way the first window in which the CPU accepts the magic string is taken by -the first invokation which blocks until the second reset happens. The second -window is then hit with the image to boot. This is not 100% reliable but works -most of the time. +The UART that can be used to boot via RS232 (using ``kwboot``) hides behind a +sticker on the backside of the machine. It uses TTL levels. -- 2.11.0 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
