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[RPi/RPi2] linux: Reduce power consumption after shutdown
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47 changes: 47 additions & 0 deletions
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config/platforms/arm/bcm2708/packages/linux/patches/1100-Power-off.diff
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| --- a/arch/arm/kernel/reboot.c 2016-03-24 11:11:55.000000000 +0100 | ||
| +++ b/arch/arm/kernel/reboot.c 2016-04-24 12:54:02.860639634 +0200 | ||
| @@ -18,6 +18,17 @@ | ||
| typedef void (*phys_reset_t)(unsigned long); | ||
|
|
||
| /* | ||
| + * Enter non-interruptable CPU halt state | ||
| + */ | ||
| +static void cpu_halt(void) | ||
| +{ | ||
| + local_irq_disable(); | ||
| + | ||
| + while (1) | ||
| + cpu_do_idle(); | ||
| +} | ||
| + | ||
| +/* | ||
| * Function pointers to optional machine specific functions | ||
| */ | ||
| void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); | ||
| @@ -105,8 +116,7 @@ | ||
| local_irq_disable(); | ||
| smp_send_stop(); | ||
|
|
||
| - local_irq_disable(); | ||
| - while (1); | ||
| + cpu_halt(); | ||
| } | ||
|
|
||
| /* | ||
| @@ -122,6 +132,8 @@ | ||
|
|
||
| if (pm_power_off) | ||
| pm_power_off(); | ||
| + | ||
| + cpu_halt(); | ||
| } | ||
|
|
||
| /* | ||
| @@ -150,6 +162,5 @@ | ||
|
|
||
| /* Whoops - the platform was unable to reboot. Tell the user! */ | ||
| printk("Reboot failed -- System halted\n"); | ||
| - local_irq_disable(); | ||
| - while (1); | ||
| + cpu_halt(); | ||
| } |
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47 changes: 47 additions & 0 deletions
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config/platforms/arm/bcm2709/packages/linux/patches/1100-Power-off.diff
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| --- a/arch/arm/kernel/reboot.c 2016-03-24 11:11:55.000000000 +0100 | ||
| +++ b/arch/arm/kernel/reboot.c 2016-04-24 12:54:02.860639634 +0200 | ||
| @@ -18,6 +18,17 @@ | ||
| typedef void (*phys_reset_t)(unsigned long); | ||
|
|
||
| /* | ||
| + * Enter non-interruptable CPU halt state | ||
| + */ | ||
| +static void cpu_halt(void) | ||
| +{ | ||
| + local_irq_disable(); | ||
| + | ||
| + while (1) | ||
| + cpu_do_idle(); | ||
| +} | ||
| + | ||
| +/* | ||
| * Function pointers to optional machine specific functions | ||
| */ | ||
| void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); | ||
| @@ -105,8 +116,7 @@ | ||
| local_irq_disable(); | ||
| smp_send_stop(); | ||
|
|
||
| - local_irq_disable(); | ||
| - while (1); | ||
| + cpu_halt(); | ||
| } | ||
|
|
||
| /* | ||
| @@ -122,6 +132,8 @@ | ||
|
|
||
| if (pm_power_off) | ||
| pm_power_off(); | ||
| + | ||
| + cpu_halt(); | ||
| } | ||
|
|
||
| /* | ||
| @@ -150,6 +162,5 @@ | ||
|
|
||
| /* Whoops - the platform was unable to reboot. Tell the user! */ | ||
| printk("Reboot failed -- System halted\n"); | ||
| - local_irq_disable(); | ||
| - while (1); | ||
| + cpu_halt(); | ||
| } |