* [PATCH v2] ARM: dts: imx6ulz-bsh-smm-m2: fix resume via console
@ 2025-07-15 14:13 Dario Binacchi
2025-07-21 9:36 ` Peng Fan
2025-08-21 7:27 ` Shawn Guo
0 siblings, 2 replies; 3+ messages in thread
From: Dario Binacchi @ 2025-07-15 14:13 UTC (permalink / raw)
To: linux-kernel
Cc: Peng Fan, linux-amarula, Wolfgang Birkner, Dario Binacchi,
Conor Dooley, Fabio Estevam, Krzysztof Kozlowski,
Pengutronix Kernel Team, Rob Herring, Sascha Hauer, Shawn Guo,
devicetree, imx, linux-arm-kernel
From: Wolfgang Birkner <wolfgang.birkner@bshg.com>
Despite the current configuration being compliant with the technical
reference manual (TRM), testing on the system showed that resuming from
suspend via UART4 (used as the console) fails unless any other UART
is also enabled.
In our use case, UART2 is enabled to ensure reliable resume when UART4
is used as the console.
Signed-off-by: Wolfgang Birkner <wolfgang.birkner@bshg.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---
Changes in v2:
- Improve commit message
- Drop patches:
- 1/3 ARM: dts: imx6ulz-bsh-smm-m2: Enable hardware rng
- 3/3 ARM: dts: imx6ulz-bsh-smm-m2: Update wifi/bluetooth pinctrl
arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts b/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts
index 6159ed70d966..2d9f495660c9 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts
@@ -33,6 +33,10 @@ &snvs_poweroff {
status = "okay";
};
+&uart2 {
+ status = "okay";
+};
+
&uart3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart3>;
--
2.43.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* RE: [PATCH v2] ARM: dts: imx6ulz-bsh-smm-m2: fix resume via console
2025-07-15 14:13 [PATCH v2] ARM: dts: imx6ulz-bsh-smm-m2: fix resume via console Dario Binacchi
@ 2025-07-21 9:36 ` Peng Fan
2025-08-21 7:27 ` Shawn Guo
1 sibling, 0 replies; 3+ messages in thread
From: Peng Fan @ 2025-07-21 9:36 UTC (permalink / raw)
To: Dario Binacchi, linux-kernel@vger.kernel.org
Cc: linux-amarula@amarulasolutions.com, Wolfgang Birkner,
Conor Dooley, Fabio Estevam, Krzysztof Kozlowski,
Pengutronix Kernel Team, Rob Herring, Sascha Hauer, Shawn Guo,
devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org
> Subject: [PATCH v2] ARM: dts: imx6ulz-bsh-smm-m2: fix resume via
> console
>
> From: Wolfgang Birkner <wolfgang.birkner@bshg.com>
>
> Despite the current configuration being compliant with the technical
> reference manual (TRM), testing on the system showed that resuming
> from suspend via UART4 (used as the console) fails unless any other
> UART is also enabled.
>
> In our use case, UART2 is enabled to ensure reliable resume when
> UART4 is used as the console.
>
> Signed-off-by: Wolfgang Birkner <wolfgang.birkner@bshg.com>
> Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
>
Not sure why there is dependency here, but enable it
does not harm, so
Ack-by: Peng Fan <peng.fan@nxp.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] ARM: dts: imx6ulz-bsh-smm-m2: fix resume via console
2025-07-15 14:13 [PATCH v2] ARM: dts: imx6ulz-bsh-smm-m2: fix resume via console Dario Binacchi
2025-07-21 9:36 ` Peng Fan
@ 2025-08-21 7:27 ` Shawn Guo
1 sibling, 0 replies; 3+ messages in thread
From: Shawn Guo @ 2025-08-21 7:27 UTC (permalink / raw)
To: Dario Binacchi
Cc: linux-kernel, Peng Fan, linux-amarula, Wolfgang Birkner,
Conor Dooley, Fabio Estevam, Krzysztof Kozlowski,
Pengutronix Kernel Team, Rob Herring, Sascha Hauer, Shawn Guo,
devicetree, imx, linux-arm-kernel
On Tue, Jul 15, 2025 at 04:13:10PM +0200, Dario Binacchi wrote:
> From: Wolfgang Birkner <wolfgang.birkner@bshg.com>
>
> Despite the current configuration being compliant with the technical
> reference manual (TRM), testing on the system showed that resuming from
> suspend via UART4 (used as the console) fails unless any other UART
> is also enabled.
>
> In our use case, UART2 is enabled to ensure reliable resume when UART4
> is used as the console.
>
> Signed-off-by: Wolfgang Birkner <wolfgang.birkner@bshg.com>
> Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Weird, but applied.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2025-07-15 14:13 [PATCH v2] ARM: dts: imx6ulz-bsh-smm-m2: fix resume via console Dario Binacchi
2025-07-21 9:36 ` Peng Fan
2025-08-21 7:27 ` Shawn Guo
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