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Diffstat (limited to 'target/linux/cns3xxx/patches/102-cns3xxx_timers.patch')
-rw-r--r--target/linux/cns3xxx/patches/102-cns3xxx_timers.patch109
1 files changed, 109 insertions, 0 deletions
diff --git a/target/linux/cns3xxx/patches/102-cns3xxx_timers.patch b/target/linux/cns3xxx/patches/102-cns3xxx_timers.patch
new file mode 100644
index 0000000000..dddb85a4db
--- /dev/null
+++ b/target/linux/cns3xxx/patches/102-cns3xxx_timers.patch
@@ -0,0 +1,109 @@
+--- a/arch/arm/mach-cns3xxx/core.c
++++ b/arch/arm/mach-cns3xxx/core.c
+@@ -118,12 +118,13 @@ static void cns3xxx_timer_set_mode(enum
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+- reload = pclk * 20 / (3 * HZ) * 0x25000;
++ reload = pclk * 1000000 / HZ;
+ writel(reload, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
+ ctrl |= (1 << 0) | (1 << 2) | (1 << 9);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ /* period set, and timer enabled in 'next_event' hook */
++ writel(0, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
+ ctrl |= (1 << 2) | (1 << 9);
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+@@ -148,11 +149,11 @@ static int cns3xxx_timer_set_next_event(
+
+ static struct clock_event_device cns3xxx_tmr1_clockevent = {
+ .name = "cns3xxx timer1",
+- .shift = 8,
++ .shift = 32,
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .set_mode = cns3xxx_timer_set_mode,
+ .set_next_event = cns3xxx_timer_set_next_event,
+- .rating = 350,
++ .rating = 300,
+ .cpumask = cpu_all_mask,
+ };
+
+@@ -194,6 +195,35 @@ static struct irqaction cns3xxx_timer_ir
+ .handler = cns3xxx_timer_interrupt,
+ };
+
++static cycle_t cns3xxx_get_cycles(struct clocksource *cs)
++{
++ u64 val;
++
++ val = readl(cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET);
++ val &= 0xffff;
++
++ return ((val << 32) | readl(cns3xxx_tmr1 + TIMER_FREERUN_OFFSET));
++}
++
++static struct clocksource clocksource_cns3xxx = {
++ .name = "freerun",
++ .rating = 200,
++ .read = cns3xxx_get_cycles,
++ .mask = CLOCKSOURCE_MASK(48),
++ .shift = 16,
++ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
++};
++
++static void __init cns3xxx_clocksource_init(void)
++{
++ /* Reset the FreeRunning counter */
++ writel((1 << 16), cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET);
++
++ clocksource_cns3xxx.mult =
++ clocksource_khz2mult(100, clocksource_cns3xxx.shift);
++ clocksource_register(&clocksource_cns3xxx);
++}
++
+ /*
+ * Set up the clock source and clock events devices
+ */
+@@ -211,13 +241,12 @@ static void __init __cns3xxx_timer_init(
+ /* stop free running timer3 */
+ writel(0, cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET);
+
+- /* timer1 */
+- writel(0x5C800, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET);
+- writel(0x5C800, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET);
+-
+ writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V1_OFFSET);
+ writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V2_OFFSET);
+
++ val = (cns3xxx_cpu_clock() >> 3) * 1000000 / HZ;
++ writel(val, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET);
++
+ /* mask irq, non-mask timer1 overflow */
+ irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
+ irq_mask &= ~(1 << 2);
+@@ -229,23 +258,9 @@ static void __init __cns3xxx_timer_init(
+ val |= (1 << 9);
+ writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
+
+- /* timer2 */
+- writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V1_OFFSET);
+- writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V2_OFFSET);
+-
+- /* mask irq */
+- irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
+- irq_mask |= ((1 << 3) | (1 << 4) | (1 << 5));
+- writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET);
+-
+- /* down counter */
+- val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
+- val |= (1 << 10);
+- writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);
+-
+- /* Make irqs happen for the system timer */
+ setup_irq(timer_irq, &cns3xxx_timer_irq);
+
++ cns3xxx_clocksource_init();
+ cns3xxx_clockevents_init(timer_irq);
+ }
+