On 05:32-20131121, Stefan Roese wrote:
> On 11/21/2013 05:28 AM, Stefan Roese wrote:
> >>>> Disabling the RTC in the DT doesn't help (of course). So what's the
> >>>> recommended way to disable this hwmod access to the RTC registers?
> >>>
> >>>
> >>> http://www.spinics.net/lists/linux-omap/msg98207.html
> >>> might help you - we had thought it might get queued for 3.12, but it
> >>> was queued for 3.13 instead..
> >
> > Unfortunately this patch doesn't fix the crash for me (yet). With this
> > patch applied and the RTC DT node completely removed from am33xx.dtsi it
> > works. But only disabling it (via status = "disabled" in the board dts
> > file) doesn't work.
> >
> > I'll dig a bit deeper today...
>
> This (hacky) patch works, but I'm not sure if this is acceptable upstream:
>
> am335x-board_foo.dts:
>
> ...
>
> &rtc {
> reg = <0x0 0x0>;
> };
>
You should be able to achieve the same effect as following (example from
BBB) - though I dont see this defined in
Documentation/devicetree/bindings/arm/omap/omap.txt
I will allow the wisdom of others to comment better here :)
diff --git a/arch/arm/boot/dts/am335x-boneblack.dts
b/arch/arm/boot/dts/am335x-boneblack.dts
index 6b71ad9..a734ef4 100644
--- a/arch/arm/boot/dts/am335x-boneblack.dts
+++ b/arch/arm/boot/dts/am335x-boneblack.dts
@@ -66,6 +66,11 @@
status = "okay";
};
+&am335xrtc {
+ status = "disabled";
+ ti,hwmods="disabled";
+};
+
/ {
hdmi {
compatible = "ti,tilcdc,slave";
diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index f6d8ffe..71bf2ec 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -373,7 +373,7 @@
ti,timer-pwm;
};
- rtc@44e3e000 {
+ am335xrtc: rtc@44e3e000 {
compatible = "ti,da830-rtc";
reg = <0x44e3e000 0x1000>;
interrupts = <75
--
Regards,
Nishanth Menon
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