linux-kernel - [PATCH] arm64: dts: meson: add rtc aliases to meson-khadas-vim3.dtsi

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Date:   Tue, 24 Nov 2020 14:53:38 +0000
From:   Christian Hewitt <christianshewitt@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Christian Hewitt <christianshewitt@...il.com>
Subject: [PATCH] arm64: dts: meson: add rtc aliases to meson-khadas-vim3.dtsi

Tweak the node name to make it aliasable, then add aliases for the
on-board RTC chip and meson-vrtc timer so they probe as rtc0 and
rtc1 respectively.

before:

VIM3:~ # dmesg | grep rtc
[    3.622530] meson-vrtc ff8000a8.rtc: registered as rtc0
[    3.622574] meson-vrtc ff8000a8.rtc: setting system clock to 1970-01-01T00:00:03 UTC (3)
[    3.646936] rtc-hym8563 0-0051: no valid clock/calendar values available
[    3.647125] rtc-hym8563 0-0051: registered as rtc1
[    3.852382] rtc-hym8563 0-0051: no valid clock/calendar values available

after:

VIM3:~ # dmesg | grep rtc
[    3.583735] meson-vrtc ff8000a8.rtc: registered as rtc1
[    3.633888] rtc-hym8563 0-0051: no valid clock/calendar values available
[    3.634120] rtc-hym8563 0-0051: registered as rtc0
[    3.635250] rtc-hym8563 0-0051: no valid clock/calendar values available
[    3.635267] rtc-hym8563 0-0051: hctosys: unable to read the hardware clock
[    3.852632] rtc-hym8563 0-0051: no valid clock/calendar values available

Signed-off-by: Christian Hewitt <christianshewitt@...il.com>
---
 arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
index 69e6c03a787c..8f8656262ae7 100644
--- a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
@@ -14,6 +14,8 @@
 	aliases {
 		serial0 = &uart_AO;
 		ethernet0 = &ethmac;
+		rtc0 = &rtc;
+		rtc1 = &vrtc;
 	};
 
 	chosen {
@@ -333,7 +335,7 @@
 		#gpio-cells = <2>;
 	};
 
-	rtc@51 {
+	rtc: rtc@51 {
 		compatible = "haoyu,hym8563";
 		reg = <0x51>;
 		#clock-cells = <0>;
-- 
2.17.1