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| author | Sebastian Macke <sebastian@macke.de> | 2014-07-20 17:13:31 +0200 |
|---|---|---|
| committer | Stafford Horne <shorne@gmail.com> | 2017-02-24 20:14:35 +0100 |
| commit | e29d11c6991d078bf2011f25dc8c19a2f38c4c8e (patch) | |
| tree | c194d4a427c9c1938b7a9df6f3606973e1cf6c8e /arch/openrisc | |
| parent | openrisc: Fix the bitmask for the unit present register (diff) | |
| download | linux-e29d11c6991d078bf2011f25dc8c19a2f38c4c8e.tar.xz linux-e29d11c6991d078bf2011f25dc8c19a2f38c4c8e.zip | |
openrisc: Initial support for the idle state
This patch adds basic support for the idle state of the cpu.
The patch overrides the regular idle function, enables the interupts,
checks for the power management unit and enables the cpu doze mode
if available.
Signed-off-by: Sebastian Macke <sebastian@macke.de>
[shorne@gmail.com: Fixed checkpatch, blankline after declarations]
Signed-off-by: Stafford Horne <shorne@gmail.com>
Diffstat (limited to 'arch/openrisc')
| -rw-r--r-- | arch/openrisc/kernel/process.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c index c49350b200e1..6e9d1cb519f2 100644 --- a/arch/openrisc/kernel/process.c +++ b/arch/openrisc/kernel/process.c @@ -75,6 +75,17 @@ void machine_power_off(void) __asm__("l.nop 1"); } +/* + * Send the doze signal to the cpu if available. + * Make sure, that all interrupts are enabled + */ +void arch_cpu_idle(void) +{ + local_irq_enable(); + if (mfspr(SPR_UPR) & SPR_UPR_PMP) + mtspr(SPR_PMR, mfspr(SPR_PMR) | SPR_PMR_DME); +} + void (*pm_power_off) (void) = machine_power_off; /* |