@@ -241,6 +241,28 @@ static void mtk_gpt_enable_irq(struct timer_of *to, u8 timer)
timer_of_base(to) + GPT_IRQ_EN_REG);
}
+static void mtk_gpt_resume(struct clock_event_device *clk)
+{
+ struct timer_of *to = to_timer_of(clk);
+
+ mtk_gpt_enable_irq(to, TIMER_CLK_EVT);
+}
+
+static void mtk_gpt_suspend(struct clock_event_device *clk)
+{
+ struct timer_of *to = to_timer_of(clk);
+
+ /* Disable all interrupts */
+ writel(0x0, timer_of_base(to) + GPT_IRQ_EN_REG);
+
+ /*
+ * This is called with interrupts disabled,
+ * so we need to ack any interrupt that is pending
+ * or for example ATF will prevent a suspend from completing.
+ */
+ writel(0x3f, timer_of_base(to) + GPT_IRQ_ACK_REG);
+}
+
static struct timer_of to = {
.flags = TIMER_OF_IRQ | TIMER_OF_BASE | TIMER_OF_CLOCK,
@@ -286,6 +308,8 @@ static int __init mtk_gpt_init(struct device_node *node)
to.clkevt.set_state_oneshot = mtk_gpt_clkevt_shutdown;
to.clkevt.tick_resume = mtk_gpt_clkevt_shutdown;
to.clkevt.set_next_event = mtk_gpt_clkevt_next_event;
+ to.clkevt.suspend = mtk_gpt_suspend;
+ to.clkevt.resume = mtk_gpt_resume;
to.of_irq.handler = mtk_gpt_interrupt;
ret = timer_of_init(node, &to);
Interrupts are disabled during suspend before this driver disables its timers. ARM trusted firmware will abort suspend if the timer irq is pending, so ack and disable the timer interrupt during suspend. Signed-off-by: Evan Benn <evanbenn@chromium.org> --- Changes in v4: Fix the comment style. Changes in v3: Move the ACK from the shutdown to the suspend function. Changes in v2: Remove the patch that splits the drivers into 2 files. drivers/clocksource/timer-mediatek.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)