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clockevents/drivers/arm_arch_timer: Migrate to new 'set-state' interface 

Migrate arm_arch_timer driver to the new 'set-state' interface provided
by the clockevents core, the earlier 'set-mode' interface is marked
obsolete now.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Viresh Kumar 2015-06-12 13:30:12 +05:30 committed by Daniel Lezcano
parent d74892c5b2
commit 46c5bfdda3
1 changed files with 22 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/clocksource/arm_arch_timer.c
View File

@ -181,44 +181,36 @@ static irqreturn_t arch_timer_handler_virt_mem(int irq, void *dev_id)
return timer_handler(ARCH_TIMER_MEM_VIRT_ACCESS, evt);
}
static __always_inline void timer_set_mode(const int access, int mode,
struct clock_event_device *clk)
static __always_inline int timer_shutdown(const int access,
struct clock_event_device *clk)
{
unsigned long ctrl;
switch (mode) {
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
ctrl = arch_timer_reg_read(access, ARCH_TIMER_REG_CTRL, clk);
ctrl &= ~ARCH_TIMER_CTRL_ENABLE;
arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
break;
default:
break;
}
ctrl = arch_timer_reg_read(access, ARCH_TIMER_REG_CTRL, clk);
ctrl &= ~ARCH_TIMER_CTRL_ENABLE;
arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
return 0;
}
static void arch_timer_set_mode_virt(enum clock_event_mode mode,
struct clock_event_device *clk)
static int arch_timer_shutdown_virt(struct clock_event_device *clk)
{
timer_set_mode(ARCH_TIMER_VIRT_ACCESS, mode, clk);
return timer_shutdown(ARCH_TIMER_VIRT_ACCESS, clk);
}
static void arch_timer_set_mode_phys(enum clock_event_mode mode,
struct clock_event_device *clk)
static int arch_timer_shutdown_phys(struct clock_event_device *clk)
{
timer_set_mode(ARCH_TIMER_PHYS_ACCESS, mode, clk);
return timer_shutdown(ARCH_TIMER_PHYS_ACCESS, clk);
}
static void arch_timer_set_mode_virt_mem(enum clock_event_mode mode,
struct clock_event_device *clk)
static int arch_timer_shutdown_virt_mem(struct clock_event_device *clk)
{
timer_set_mode(ARCH_TIMER_MEM_VIRT_ACCESS, mode, clk);
return timer_shutdown(ARCH_TIMER_MEM_VIRT_ACCESS, clk);
}
static void arch_timer_set_mode_phys_mem(enum clock_event_mode mode,
struct clock_event_device *clk)
static int arch_timer_shutdown_phys_mem(struct clock_event_device *clk)
{
timer_set_mode(ARCH_TIMER_MEM_PHYS_ACCESS, mode, clk);
return timer_shutdown(ARCH_TIMER_MEM_PHYS_ACCESS, clk);
}
static __always_inline void set_next_event(const int access, unsigned long evt,
@ -273,11 +265,11 @@ static void __arch_timer_setup(unsigned type,
clk->cpumask = cpumask_of(smp_processor_id());
if (arch_timer_use_virtual) {
clk->irq = arch_timer_ppi[VIRT_PPI];
clk->set_mode = arch_timer_set_mode_virt;
clk->set_state_shutdown = arch_timer_shutdown_virt;
clk->set_next_event = arch_timer_set_next_event_virt;
} else {
clk->irq = arch_timer_ppi[PHYS_SECURE_PPI];
clk->set_mode = arch_timer_set_mode_phys;
clk->set_state_shutdown = arch_timer_shutdown_phys;
clk->set_next_event = arch_timer_set_next_event_phys;
}
} else {
@ -286,17 +278,17 @@ static void __arch_timer_setup(unsigned type,
clk->rating = 400;
clk->cpumask = cpu_all_mask;
if (arch_timer_mem_use_virtual) {
clk->set_mode = arch_timer_set_mode_virt_mem;
clk->set_state_shutdown = arch_timer_shutdown_virt_mem;
clk->set_next_event =
arch_timer_set_next_event_virt_mem;
} else {
clk->set_mode = arch_timer_set_mode_phys_mem;
clk->set_state_shutdown = arch_timer_shutdown_phys_mem;
clk->set_next_event =
arch_timer_set_next_event_phys_mem;
}
}
clk->set_mode(CLOCK_EVT_MODE_SHUTDOWN, clk);
clk->set_state_shutdown(clk);
clockevents_config_and_register(clk, arch_timer_rate, 0xf, 0x7fffffff);
}
@ -506,7 +498,7 @@ static void arch_timer_stop(struct clock_event_device *clk)
disable_percpu_irq(arch_timer_ppi[PHYS_NONSECURE_PPI]);
}
clk->set_mode(CLOCK_EVT_MODE_UNUSED, clk);
clk->set_state_shutdown(clk);
}
static int arch_timer_cpu_notify(struct notifier_block *self,