From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH v2 06/10] ARM: dts: stm32mp: setup syscon-reboot-mode on TAMP general purpose register
Date: Mon, 28 Sep 2020 16:45:10 +0200 [thread overview]
Message-ID: <20200928144514.14398-7-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20200928144514.14398-1-a.fatoum@pengutronix.de>
With the reboot mode infrastructure in place, lets add the first in-tree
user. The STM32MP1 SoCs have general purpose registers in the TAMP
peripheral. Register 20 there is used by the vendor's U-Boot for storing
a forced boot mode. We will use the same location for our reboot mode.
Consistency between barebox and OS is maintained by having barebox fixup
the device tree with the same reboot mode information it used itself, so
we are free to choose our own mode identifiers.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
arch/arm/dts/stm32mp151.dtsi | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/dts/stm32mp151.dtsi b/arch/arm/dts/stm32mp151.dtsi
index cc2540047591..ca11492de564 100644
--- a/arch/arm/dts/stm32mp151.dtsi
+++ b/arch/arm/dts/stm32mp151.dtsi
@@ -28,6 +28,7 @@
pwm15 = &{/soc/timer@44006000/pwm};
pwm16 = &{/soc/timer@44007000/pwm};
pwm17 = &{/soc/timer@44008000/pwm};
+ tamp.reboot_mode = &reboot_mode_tamp;
};
};
@@ -42,6 +43,20 @@
compatible = "st,stm32mp1-ddr";
reg = <0x5a003000 0x1000>;
};
+
+ tamp@5c00a000 {
+ compatible = "simple-bus", "syscon", "simple-mfd";
+ reg = <0x5c00a000 0x400>;
+
+ reboot_mode_tamp: reboot-mode {
+ compatible = "syscon-reboot-mode";
+ offset = <0x150>; /* reg20 */
+ mask = <0xff>;
+ mode-normal = <0>;
+ mode-loader = <0xBB>;
+ mode-recovery = <0xBC>;
+ };
+ };
};
&bsec {
--
2.28.0
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next prev parent reply other threads:[~2020-09-28 14:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 14:45 [PATCH v2 00/10] power: reset: add support for syscon reboot Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 01/10] usbgadget: autostart: support delayed usbgadget.autostart=1 Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 02/10] drivers: add reboot-mode infrastructure Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 03/10] power: reset: reboot-mode: port syscon-reboot-mode support Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 04/10] power: reset: reboot-mode: fix up node into boot device tree Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 05/10] defaultenv: provide defaults for generic reboot modes Ahmad Fatoum
2020-09-28 14:45 ` Ahmad Fatoum [this message]
2020-09-28 14:45 ` [PATCH v2 07/10] ARM: stm32mp: remove custom reboot mode logic from arch code Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 08/10] power: reset: reboot-mode: support multi-word magic Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 09/10] power: reset: syscon-reboot-mode: support multi-word reboot modes Ahmad Fatoum
2020-09-28 14:45 ` [PATCH v2 10/10] ARM: dts: i.MX6qdl: define BootROM reboot-mode on top of SRC_GPR{9, 10} Ahmad Fatoum
2020-09-29 8:25 ` [PATCH v2 00/10] power: reset: add support for syscon reboot Sascha Hauer
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