ARM: dts: armada-385-linksys: Disable internal RTC

ARM: dts: armada-385-linksys: Disable internal RTC

[Hauke Mehrtens]

The internal RTC does not work correctly on these Linksys boards based
on Marvell SoCs. For me it only shows Wed Dec 31 23:59:59 1969 and for
others it is off by 3 minutes in 10 minutes running, this was reported
by multiple users. On the Linksys Mamba device the device tree comment
says that no crystal is connected to the internal RTC, this is probably
also true for the other devices.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 arch/arm/boot/dts/armada-385-linksys.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/armada-385-linksys.dtsi b/arch/arm/boot/dts/armada-385-linksys.dtsi
index 434dc9aaa5e4..b7bbf15571c5 100644
--- a/arch/arm/boot/dts/armada-385-linksys.dtsi
+++ b/arch/arm/boot/dts/armada-385-linksys.dtsi
@@ -282,3 +282,8 @@
 	status = "okay";
 	usb-phy = <&usb3_1_phy>;
 };
+
+&rtc {
+	/* No crystal connected to the internal RTC */
+	status = "disabled";
+};
-- 
2.11.0

ARM: dts: armada-385-linksys: Disable internal RTC

[Gregory CLEMENT]

Hi Hauke,
 
 On sam., mars 17 2018, Hauke Mehrtens <hauke@hauke-m.de> wrote:

> The internal RTC does not work correctly on these Linksys boards based
> on Marvell SoCs. For me it only shows Wed Dec 31 23:59:59 1969 and for
> others it is off by 3 minutes in 10 minutes running, this was reported
> by multiple users. On the Linksys Mamba device the device tree comment
> says that no crystal is connected to the internal RTC, this is probably
> also true for the other devices.
>
> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

Applied on mvebu/dt

Thanks,

Gregory

> ---
>  arch/arm/boot/dts/armada-385-linksys.dtsi | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/armada-385-linksys.dtsi b/arch/arm/boot/dts/armada-385-linksys.dtsi
> index 434dc9aaa5e4..b7bbf15571c5 100644
> --- a/arch/arm/boot/dts/armada-385-linksys.dtsi
> +++ b/arch/arm/boot/dts/armada-385-linksys.dtsi
> @@ -282,3 +282,8 @@
>  	status = "okay";
>  	usb-phy = <&usb3_1_phy>;
>  };
> +
> +&rtc {
> +	/* No crystal connected to the internal RTC */
> +	status = "disabled";
> +};
> -- 
> 2.11.0
>

-- 
Gregory Clement, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
http://bootlin.com