From 287eb2be4037c3d8d96b5d9490fa0e695e4553b9 Mon Sep 17 00:00:00 2001 From: Christian Hewitt Date: Mon, 16 Nov 2020 06:41:47 +0000 Subject: arm64: dts: meson: enable rtc node on Khadas VIM1/VIM2 boards Enable the rtc node on VIM1/VIM2 boards so users can simply attach a power cell and use the on-board RTC without modifying the device-tree. Cold boot with no cell attached is gracefully handled: VIM2:~ # dmesg | grep rtc [ 7.716150] rtc-hym8563 1-0051: no valid clock/calendar values available [ 7.716957] rtc-hym8563 1-0051: registered as rtc0 [ 7.729850] rtc-hym8563 1-0051: no valid clock/calendar values available [ 7.729877] rtc-hym8563 1-0051: hctosys: unable to read the hardware clock [ 8.126768] rtc-hym8563 1-0051: no valid clock/calendar values available Warm boot (and any boot with cell attached) recalls stored values resulting in consistently faster (re)boot times: VIM2:~ # dmesg | grep rtc [ 7.441671] rtc-hym8563 1-0051: registered as rtc0 [ 7.442663] rtc-hym8563 1-0051: setting system clock to 2020-11-16T05:49:59 UTC (1605505799) Suggested-by: Artem Lapkin Signed-off-by: Christian Hewitt Reviewed-by: Neil Armstrong Signed-off-by: Kevin Hilman Link: https://lore.kernel.org/r/20201116064147.12062-1-christianshewitt@gmail.com --- arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts | 3 +-- arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts index 8bcdffdf55d0..638a5992d760 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts @@ -97,8 +97,7 @@ pinctrl-names = "default"; rtc: rtc@51 { - /* has to be enabled manually when a battery is connected: */ - status = "disabled"; + status = "okay"; compatible = "haoyu,hym8563"; reg = <0x51>; #clock-cells = <0>; diff --git a/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts b/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts index bff8ec2c1c70..da000c10b945 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts @@ -228,8 +228,7 @@ pinctrl-names = "default"; rtc: rtc@51 { - /* has to be enabled manually when a battery is connected: */ - status = "disabled"; + status = "okay"; compatible = "haoyu,hym8563"; reg = <0x51>; #clock-cells = <0>; -- cgit v1.2.3