10034aabca
When a CPU is hot unplugged, the generic tick code cleans up the clock event device, but fails to call down to the device's set_mode function to actually shut the device down. To work around this, we've historically had a local_timer_stop() callback out of the hotplug code. However, this adds needless complexity when we have the clock event device itself available. Explicitly call the clock event device's set_mode function with CLOCK_EVT_MODE_UNUSED, so that the hardware can be cleanly shutdown without any special external callbacks. When/if the generic code is fixed, percpu_timer_stop() can be killed off. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
29 lines
688 B
C
29 lines
688 B
C
#ifndef __ASMARM_SMP_TWD_H
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#define __ASMARM_SMP_TWD_H
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#define TWD_TIMER_LOAD 0x00
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#define TWD_TIMER_COUNTER 0x04
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#define TWD_TIMER_CONTROL 0x08
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#define TWD_TIMER_INTSTAT 0x0C
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#define TWD_WDOG_LOAD 0x20
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#define TWD_WDOG_COUNTER 0x24
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#define TWD_WDOG_CONTROL 0x28
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#define TWD_WDOG_INTSTAT 0x2C
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#define TWD_WDOG_RESETSTAT 0x30
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#define TWD_WDOG_DISABLE 0x34
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#define TWD_TIMER_CONTROL_ENABLE (1 << 0)
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#define TWD_TIMER_CONTROL_ONESHOT (0 << 1)
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#define TWD_TIMER_CONTROL_PERIODIC (1 << 1)
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#define TWD_TIMER_CONTROL_IT_ENABLE (1 << 2)
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struct clock_event_device;
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extern void __iomem *twd_base;
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int twd_timer_ack(void);
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void twd_timer_setup(struct clock_event_device *);
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#endif
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