Re: [PATCH v2 2/3] arm64: dts: ti: Add reserved memory for watchdog

[Li, Hua Qian]

On Tue, 2023-07-11 at 11:24 +0200, Krzysztof Kozlowski wrote:
> On 11/07/2023 11:17, huaqian.li@xxxxxxxxxxx wrote:
> > From: Li Hua Qian <huaqian.li@xxxxxxxxxxx>
> > 
> > This patch adds a reserved memory for the TI AM65X platform
> > watchdog to
> > reserve the specific info, triggering the watchdog reset in last
> > boot,
> > to know if the board reboot is due to a watchdog reset.
> > 
> > Signed-off-by: Li Hua Qian <huaqian.li@xxxxxxxxxxx>
> > ---
> >  arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi | 11
> > +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
> > b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
> > index e26bd988e522..77380e52a334 100644
> > --- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
> > +++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
> > @@ -63,6 +63,12 @@ rtos_ipc_memory_region: ipc-memories@a2000000 {
> >                         alignment = <0x1000>;
> >                         no-map;
> >                 };
> > +
> > +               /* To reserve the power-on(PON) reason for watchdog
> > reset */
> > +               wdt_reset_memory_region: wdt-memory@a2200000 {
> > +                       reg = <0x00 0xa2200000 0x00 0x00001000>;
> > +                       no-map;
> > +               };
> >         };
> >  
> >         leds {
> > @@ -718,3 +724,8 @@ &mcu_r5fss0_core1 {
> >                         <&mcu_r5fss0_core1_memory_region>;
> >         mboxes = <&mailbox0_cluster1>, <&mbox_mcu_r5fss0_core1>;
> >  };
> > +
> > +&mcu_rti1 {
> > +       reg = <0x0 0x40610000 0x0 0x100>,
> > +             <0x0 0xa2200000 0x0 0x1000>;
> 
> That's a total mess. reserved memory and IO address space. Nope.
> 
> 
> 
> Best regards,
> Krzysztof
> 
Yes, I misunderstood the advice. I intend to roll back as I mentioned
in my last email. Any new suggestions please let me know, thank you!

Best regards,
Li Hua Qian