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authorSascha Hauer <s.hauer@pengutronix.de>2019-12-10 05:41:45 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2019-12-10 05:41:45 +0100
commit06f66d85753a49d4eb14578914ac7ce5e6454734 (patch)
treeeb748be6f6139366747067ac8d9b8597ebd4399e /Documentation
parentc65ca498685d09863efde43c73d955b729340fa5 (diff)
parentab8c218ec464f49aa1143cb26964d4774c5facb7 (diff)
downloadbarebox-06f66d85753a49d4eb14578914ac7ce5e6454734.tar.gz
Merge branch 'for-next/stm32'
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/boards/stm32mp.rst10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/boards/stm32mp.rst b/Documentation/boards/stm32mp.rst
index f93ec04..6d97b0d 100644
--- a/Documentation/boards/stm32mp.rst
+++ b/Documentation/boards/stm32mp.rst
@@ -81,3 +81,13 @@ pulled down and BOOT0 and BOOT2 are connected to a 2P DIP switch::
BOOT2 | O --O |
BOOT0 | N --O | <---- DFU on UART and USB OTG
+-------+
+
+Boot status indicator
+---------------------
+
+The ROM code on the first Cortex-A7 core pulses the PA13 pad.
+An error LED on this pad can be used to indicate boot status:
+
+* **Boot Failure:** LED lights bright
+* **UART/USB Boot:** LED blinks fast
+* **Debug access:** LED lights weak