From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 4/4] ARM: dts: stm32mp: add bootrom serial (DFU) reboot mode
Date: Tue, 9 Aug 2022 08:29:38 +0200 [thread overview]
Message-ID: <20220809062938.1750369-4-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20220809062938.1750369-1-a.fatoum@pengutronix.de>
The same register we use for the reboot mode communication between Linux
and barebox is also sampled by the bootrom. If the lowest 16 bits of it
are 0x00FF, the bootrom will enter DFU mode. Add the appropriate
reboot-mode, but with a barebox, prefix, so Linux doesn't automatically
provide it to userspace along with the existing loader and recovery
modes.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
arch/arm/dts/stm32mp151.dtsi | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/dts/stm32mp151.dtsi b/arch/arm/dts/stm32mp151.dtsi
index ed7cf6192bea..ac6536a556a9 100644
--- a/arch/arm/dts/stm32mp151.dtsi
+++ b/arch/arm/dts/stm32mp151.dtsi
@@ -41,9 +41,10 @@
reboot_mode_tamp: reboot-mode {
compatible = "syscon-reboot-mode";
offset = <0x150>; /* reg20 */
- mask = <0xff>;
+ mask = <0xffff>;
mode-normal = <0>;
mode-loader = <0xBB>;
mode-recovery = <0xBC>;
+ barebox,mode-serial = <0xFF>;
};
};
--
2.30.2
next prev parent reply other threads:[~2022-08-09 6:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-09 6:29 [PATCH 1/4] power: reset: reboot-mode: refactor to allow other mode- prefixes Ahmad Fatoum
2022-08-09 6:29 ` [PATCH 2/4] power: reset: reboot-mode: parse barebox,mode-* properties Ahmad Fatoum
2022-08-09 6:29 ` [PATCH 3/4] ARM: dts: stm32mp: reuse now upstream tamp node Ahmad Fatoum
2022-08-09 6:29 ` Ahmad Fatoum [this message]
2022-08-09 9:49 ` [PATCH 4/4] ARM: dts: stm32mp: add bootrom serial (DFU) reboot mode Sascha Hauer
2022-08-09 9:54 ` Ahmad Fatoum
2022-08-09 11:34 ` [PATCH 1/4] power: reset: reboot-mode: refactor to allow other mode- prefixes Sascha Hauer
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