From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iUSLD-0006gY-2E for barebox@lists.infradead.org; Tue, 12 Nov 2019 09:20:07 +0000 From: Ahmad Fatoum Date: Tue, 12 Nov 2019 10:19:52 +0100 Message-Id: <20191112091956.26628-6-a.fatoum@pengutronix.de> In-Reply-To: <20191112091956.26628-1-a.fatoum@pengutronix.de> References: <20191112091956.26628-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 06/10] Documentation: boards: stm32mp: document boot error LED To: barebox@lists.infradead.org Cc: Ahmad Fatoum The STM32MP Evaluation Kits place a LED on PA13 to display boot status. Document its blinking patterns. Signed-off-by: Ahmad Fatoum --- Documentation/boards/stm32mp.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/boards/stm32mp.rst b/Documentation/boards/stm32mp.rst index f93ec04eb04d..6d97b0d6d4a2 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 -- 2.24.0.rc1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox