From: Adam Ford <aford173@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Cc: aford@beaconembedded.com, Adam Ford <aford173@gmail.com>,
Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] arm64: dts: imx8mm-beacon-som: Fix RTC aliases
Date: Wed, 25 Nov 2020 15:03:38 -0600 [thread overview]
Message-ID: <20201125210339.1071419-1-aford173@gmail.com> (raw)
On the i.MX8MM Beacon SOM, there is an RTC chip which is fed power
from the baseboard during power off. The SNVS RTC integrated into
the SoC is not fed power. Depending on the order the modules are
loaded, this can be a problem if the external RTC isn't rtc0.
Make the alias for rtc0 point to the external RTC all the time and
rtc1 point to the SVNS in order to correctly hold date/time over
a power-cycle.
Fixes: 593816fa2f35 ("arm64: dts: imx: Add Beacon i.MX8m-Mini development kit")
Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
index 5565775270f9..9bdefbba9e90 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
@@ -4,6 +4,11 @@
*/
/ {
+ aliases {
+ rtc0 = &rtc;
+ rtc1 = &snvs_rtc;
+ };
+
usdhc1_pwrseq: usdhc1_pwrseq {
compatible = "mmc-pwrseq-simple";
pinctrl-names = "default";
@@ -219,7 +224,7 @@ eeprom@50 {
reg = <0x50>;
};
- rtc@51 {
+ rtc: rtc@51 {
compatible = "nxp,pcf85263";
reg = <0x51>;
};
--
2.25.1
next reply other threads:[~2020-11-25 21:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-25 21:03 Adam Ford [this message]
2020-11-25 21:03 ` [PATCH 2/2] arm64: dts: imx8mm-beacon-som: Fix PMIC clock error Adam Ford
2020-11-26 8:07 ` Krzysztof Kozlowski
2020-11-26 8:03 ` [PATCH 1/2] arm64: dts: imx8mm-beacon-som: Fix RTC aliases Krzysztof Kozlowski
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