From: Frieder Schrempf <frieder@fris.de> To: devicetree@vger.kernel.org, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Shawn Guo <shawnguo@kernel.org> Cc: Frieder Schrempf <frieder.schrempf@kontron.de>, Fabio Estevam <festevam@gmail.com>, Heiko Thiery <heiko.thiery@gmail.com>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>, Marek Vasut <marex@denx.de>, NXP Linux Team <linux-imx@nxp.com>, Pengutronix Kernel Team <kernel@pengutronix.de> Subject: [PATCH 7/7] arm64: dts: imx8mm-kontron: Enable backup switch mode for RTC on OSM-S module Date: Wed, 1 Feb 2023 15:34:29 +0100 [thread overview] Message-ID: <20230201143431.863784-8-frieder@fris.de> (raw) In-Reply-To: <20230201143431.863784-1-frieder@fris.de> From: Frieder Schrempf <frieder.schrempf@kontron.de> The board has a battery backup supply for the RTC, but the factory default is to have BSM disabled. Therefore the time will not be preserved if the board is not supplied. Fix this by forcing the RTC into BSM level mode. Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> --- arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi index 131f98cf5a04..5188b5b718a0 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi @@ -4,6 +4,7 @@ */ #include <dt-bindings/interrupt-controller/irq.h> +#include <dt-bindings/rtc/rtc.h> #include "imx8mm.dtsi" / { @@ -206,6 +207,7 @@ rtc@52 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_rtc>; interrupts-extended = <&gpio4 1 IRQ_TYPE_LEVEL_HIGH>; + backup-switch-mode = <RTC_BSM_LEVEL>; }; }; -- 2.39.1
WARNING: multiple messages have this Message-ID (diff)
From: Frieder Schrempf <frieder@fris.de> To: devicetree@vger.kernel.org, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Shawn Guo <shawnguo@kernel.org> Cc: Frieder Schrempf <frieder.schrempf@kontron.de>, Fabio Estevam <festevam@gmail.com>, Heiko Thiery <heiko.thiery@gmail.com>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>, Marek Vasut <marex@denx.de>, NXP Linux Team <linux-imx@nxp.com>, Pengutronix Kernel Team <kernel@pengutronix.de> Subject: [PATCH 7/7] arm64: dts: imx8mm-kontron: Enable backup switch mode for RTC on OSM-S module Date: Wed, 1 Feb 2023 15:34:29 +0100 [thread overview] Message-ID: <20230201143431.863784-8-frieder@fris.de> (raw) In-Reply-To: <20230201143431.863784-1-frieder@fris.de> From: Frieder Schrempf <frieder.schrempf@kontron.de> The board has a battery backup supply for the RTC, but the factory default is to have BSM disabled. Therefore the time will not be preserved if the board is not supplied. Fix this by forcing the RTC into BSM level mode. Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> --- arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi index 131f98cf5a04..5188b5b718a0 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-osm-s.dtsi @@ -4,6 +4,7 @@ */ #include <dt-bindings/interrupt-controller/irq.h> +#include <dt-bindings/rtc/rtc.h> #include "imx8mm.dtsi" / { @@ -206,6 +207,7 @@ rtc@52 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_rtc>; interrupts-extended = <&gpio4 1 IRQ_TYPE_LEVEL_HIGH>; + backup-switch-mode = <RTC_BSM_LEVEL>; }; }; -- 2.39.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-02-01 14:43 UTC|newest] Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-02-01 14:34 [PATCH 0/7] Enable backup switch mode on RTCs via devicetree Frieder Schrempf 2023-02-01 14:34 ` Frieder Schrempf 2023-02-01 14:34 ` [PATCH 1/7] dt-bindings: rtc: Move RV3028 to separate binding file Frieder Schrempf 2023-02-01 20:10 ` Rob Herring 2023-02-02 9:10 ` Krzysztof Kozlowski 2023-02-02 10:17 ` Frieder Schrempf 2023-02-01 14:34 ` [PATCH 2/7] dt-bindings: rtc: Add backup-switch-mode property Frieder Schrempf 2023-02-01 14:34 ` [PATCH 3/7] dt-bindings: rtc: microcrystal,rv3032: " Frieder Schrempf 2023-02-01 14:34 ` [PATCH 4/7] rtc: Move BSM defines to separate header for DT usage Frieder Schrempf 2023-02-02 23:22 ` kernel test robot 2023-02-01 14:34 ` [PATCH 5/7] rtc: class: Support setting backup switch mode from devicetree Frieder Schrempf 2023-02-01 14:34 ` [PATCH 6/7] arm64: dts: imx8mm-kontron: Remove useless trickle-diode-disable from RTC node Frieder Schrempf 2023-02-01 14:34 ` Frieder Schrempf 2023-02-01 14:34 ` Frieder Schrempf [this message] 2023-02-01 14:34 ` [PATCH 7/7] arm64: dts: imx8mm-kontron: Enable backup switch mode for RTC on OSM-S module Frieder Schrempf 2023-02-01 16:15 ` [PATCH 0/7] Enable backup switch mode on RTCs via devicetree Alexandre Belloni 2023-02-01 16:15 ` Alexandre Belloni 2023-02-01 16:26 ` Frieder Schrempf 2023-02-01 16:26 ` Frieder Schrempf 2023-02-13 9:18 ` Frieder Schrempf 2023-02-13 9:18 ` Frieder Schrempf 2023-03-06 13:27 ` Frieder Schrempf 2023-03-06 13:27 ` Frieder Schrempf 2023-03-22 13:14 ` Frieder Schrempf 2023-03-22 13:14 ` Frieder Schrempf 2023-03-22 22:19 ` Alexandre Belloni 2023-03-22 22:19 ` Alexandre Belloni 2023-03-28 7:10 ` Frieder Schrempf 2023-03-28 7:10 ` Frieder Schrempf
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