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Fixes for omaps 

Fixes for devkit8000 timer regression. Similar to the earlier beagleboard
 fixes, we must not configure the clocksource drivers to use an alternative
 timer configuration. It causes unnecessary issues with power management.
 Only some old designs based on early beagleboard revisions with a miswired
 timer need to use the alternative timer.
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Merge tag 'omap-for-v5.17/fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes

Fixes for omaps

Fixes for devkit8000 timer regression. Similar to the earlier beagleboard
fixes, we must not configure the clocksource drivers to use an alternative
timer configuration. It causes unnecessary issues with power management.
Only some old designs based on early beagleboard revisions with a miswired
timer need to use the alternative timer.

* tag 'omap-for-v5.17/fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: Use 32KiHz oscillator on devkit8000
  ARM: dts: switch timer config to common devkit8000 devicetree

Link: https://lore.kernel.org/r/pull-1645606483-876944@atomide.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2022-02-25 11:14:22 +01:00
Родитель 3f96885eb7 8840f5460a
Коммит f03f10a982
3 изменённых файлов: 19 добавлений и 35 удалений
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18
arch/arm/boot/dts/omap3-devkit8000-common.dtsi
Просмотреть файл

@ -158,6 +158,24 @@
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 timer for clockevent */
&timer12_target {
ti,no-reset-on-init;
ti,no-idle;
timer@0 {
/* Always clocked by secure_32k_fck */
};
};
&twl_gpio {
ti,use-leds;
/*

33
arch/arm/boot/dts/omap3-devkit8000.dts
Просмотреть файл

@ -14,36 +14,3 @@
display2 = &tv0;
};
};
/* 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>;
};
};

3
drivers/clocksource/timer-ti-dm-systimer.c
Просмотреть файл

@ -241,8 +241,7 @@ static void __init dmtimer_systimer_assign_alwon(void)
bool quirk_unreliable_oscillator = false;
/* Quirk unreliable 32 KiHz oscillator with incomplete dts */
if (of_machine_is_compatible("ti,omap3-beagle-ab4") ||
of_machine_is_compatible("timll,omap3-devkit8000")) {
if (of_machine_is_compatible("ti,omap3-beagle-ab4")) {
quirk_unreliable_oscillator = true;
counter_32k = -ENODEV;
}