* Jarkko Nikula <jarkko.nikula@xxxxxxxxxx> [210923 18:04]: > On 9/23/21 8:41 AM, Tony Lindgren wrote: > > * Jarkko Nikula <jarkko.nikula@xxxxxxxxxx> [210922 17:22]: > >> Better luck with this one but looks like idling cause "undefined > >> instruction" crash. Cache/memory etc corruption perhaps? Serial console > >> log attached. > > > > Hmm. If you comment out the twl power node, does the omap3-beagle-ab4.dtb > > boot normally for you? It should behave the same as current mainline then > > with the omap3isp issue. > > > Commenting the twl_power node out or removing the twl section leads to > immediately rebooting kernel: Below is an updated patch to move the timer quirks to omap3-beagle-ab4.dtb with no twl changes. I've verified the resulting omap3-beagle-ab4.dtb matches the current unpatched mainline kernel omap3-beagle.dtb. Then for figuring out why omap3-beagle.dtb with no timer quirks does not boot on rev c, if you could please enable CONFIG_DEBUG_LL=y and CONFIG_EARLY_PRINTK=y and select the related debug uart. You can select the defaults for other configuration options. Also, note that if your u-boot fdtaddr is too low enabling more things in the kernel may cause a situation where the uncompressing kernel overwrites the dtb. Looks like i have setenv fdtaddr 0x84000000. Regards, Tony 8< --------------------- diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -779,6 +779,7 @@ dtb-$(CONFIG_ARCH_OMAP3) += \ logicpd-som-lv-37xx-devkit.dtb \ omap3430-sdp.dtb \ omap3-beagle.dtb \ + omap3-beagle-ab4.dtb \ omap3-beagle-xm.dtb \ omap3-beagle-xm-ab.dtb \ omap3-cm-t3517.dtb \ diff --git a/arch/arm/boot/dts/omap3-beagle-ab4.dts b/arch/arm/boot/dts/omap3-beagle-ab4.dts new file mode 100644 --- /dev/null +++ b/arch/arm/boot/dts/omap3-beagle-ab4.dts @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0-only +/dts-v1/; + +#include "omap3-beagle.dts" + +/* + * Workaround for capacitor C70 issue, see "Boards revision A and < B5" + * section at https://elinux.org/BeagleBoard_Community + */ + +/* Unusable as clocksource because of unreliable oscillator */ +&counter32k { + status = "disabled"; +}; + +/* Unusable as clockevent because if unreliable oscillator, allow to idle */ +&timer1_target { + /delete-property/ti,no-reset-on-init; + /delete-property/ti,no-idle; + timer@0 { + /delete-property/ti,timer-alwon; + }; +}; + +/* Preferred always-on timer for clocksource */ +&timer12_target { + ti,no-reset-on-init; + ti,no-idle; + timer@0 { + /* Always clocked by secure_32k_fck */ + }; +}; + +/* Preferred timer for clockevent */ +&timer2_target { + ti,no-reset-on-init; + ti,no-idle; + timer@0 { + assigned-clocks = <&gpt2_fck>; + assigned-clock-parents = <&sys_ck>; + }; +}; diff --git a/arch/arm/boot/dts/omap3-beagle.dts b/arch/arm/boot/dts/omap3-beagle.dts --- a/arch/arm/boot/dts/omap3-beagle.dts +++ b/arch/arm/boot/dts/omap3-beagle.dts @@ -304,39 +304,6 @@ &usbhsehci { phys = <0 &hsusb2_phy>; }; -/* Unusable as clocksource because of unreliable oscillator */ -&counter32k { - status = "disabled"; -}; - -/* Unusable as clockevent because if unreliable oscillator, allow to idle */ -&timer1_target { - /delete-property/ti,no-reset-on-init; - /delete-property/ti,no-idle; - timer@0 { - /delete-property/ti,timer-alwon; - }; -}; - -/* Preferred always-on timer for clocksource */ -&timer12_target { - ti,no-reset-on-init; - ti,no-idle; - timer@0 { - /* Always clocked by secure_32k_fck */ - }; -}; - -/* Preferred timer for clockevent */ -&timer2_target { - ti,no-reset-on-init; - ti,no-idle; - timer@0 { - assigned-clocks = <&gpt2_fck>; - assigned-clock-parents = <&sys_ck>; - }; -}; - &twl_gpio { ti,use-leds; /* pullups: BIT(1) */ -- 2.33.0
