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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm/mach-spear/time.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/arm/mach-spear/time.c')
-rw-r--r--kernel/arch/arm/mach-spear/time.c91
1 files changed, 51 insertions, 40 deletions
diff --git a/kernel/arch/arm/mach-spear/time.c b/kernel/arch/arm/mach-spear/time.c
index 26fda4ed4..9ccffc1d0 100644
--- a/kernel/arch/arm/mach-spear/time.c
+++ b/kernel/arch/arm/mach-spear/time.c
@@ -66,8 +66,6 @@
static __iomem void *gpt_base;
static struct clk *gpt_clk;
-static void clockevent_set_mode(enum clock_event_mode mode,
- struct clock_event_device *clk_event_dev);
static int clockevent_next_event(unsigned long evt,
struct clock_event_device *clk_event_dev);
@@ -95,54 +93,67 @@ static void __init spear_clocksource_init(void)
200, 16, clocksource_mmio_readw_up);
}
-static struct clock_event_device clkevt = {
- .name = "tmr0",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = clockevent_set_mode,
- .set_next_event = clockevent_next_event,
- .shift = 0, /* to be computed */
-};
+static inline void timer_shutdown(struct clock_event_device *evt)
+{
+ u16 val = readw(gpt_base + CR(CLKEVT));
+
+ /* stop the timer */
+ val &= ~CTRL_ENABLE;
+ writew(val, gpt_base + CR(CLKEVT));
+}
+
+static int spear_shutdown(struct clock_event_device *evt)
+{
+ timer_shutdown(evt);
+
+ return 0;
+}
+
+static int spear_set_oneshot(struct clock_event_device *evt)
+{
+ u16 val;
-static void clockevent_set_mode(enum clock_event_mode mode,
- struct clock_event_device *clk_event_dev)
+ /* stop the timer */
+ timer_shutdown(evt);
+
+ val = readw(gpt_base + CR(CLKEVT));
+ val |= CTRL_ONE_SHOT;
+ writew(val, gpt_base + CR(CLKEVT));
+
+ return 0;
+}
+
+static int spear_set_periodic(struct clock_event_device *evt)
{
u32 period;
u16 val;
/* stop the timer */
+ timer_shutdown(evt);
+
+ period = clk_get_rate(gpt_clk) / HZ;
+ period >>= CTRL_PRESCALER16;
+ writew(period, gpt_base + LOAD(CLKEVT));
+
val = readw(gpt_base + CR(CLKEVT));
- val &= ~CTRL_ENABLE;
+ val &= ~CTRL_ONE_SHOT;
+ val |= CTRL_ENABLE | CTRL_INT_ENABLE;
writew(val, gpt_base + CR(CLKEVT));
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- period = clk_get_rate(gpt_clk) / HZ;
- period >>= CTRL_PRESCALER16;
- writew(period, gpt_base + LOAD(CLKEVT));
-
- val = readw(gpt_base + CR(CLKEVT));
- val &= ~CTRL_ONE_SHOT;
- val |= CTRL_ENABLE | CTRL_INT_ENABLE;
- writew(val, gpt_base + CR(CLKEVT));
-
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- val = readw(gpt_base + CR(CLKEVT));
- val |= CTRL_ONE_SHOT;
- writew(val, gpt_base + CR(CLKEVT));
-
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_RESUME:
-
- break;
- default:
- pr_err("Invalid mode requested\n");
- break;
- }
+ return 0;
}
+static struct clock_event_device clkevt = {
+ .name = "tmr0",
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .set_state_shutdown = spear_shutdown,
+ .set_state_periodic = spear_set_periodic,
+ .set_state_oneshot = spear_set_oneshot,
+ .tick_resume = spear_shutdown,
+ .set_next_event = clockevent_next_event,
+ .shift = 0, /* to be computed */
+};
+
static int clockevent_next_event(unsigned long cycles,
struct clock_event_device *clk_event_dev)
{
@@ -193,7 +204,7 @@ static void __init spear_clockevent_init(int irq)
setup_irq(irq, &spear_timer_irq);
}
-const static struct of_device_id timer_of_match[] __initconst = {
+static const struct of_device_id const timer_of_match[] __initconst = {
{ .compatible = "st,spear-timer", },
{ },
};