@@ -19,6 +19,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqreturn.h>
+#include <linux/sched_clock.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
@@ -96,6 +97,11 @@ static struct irqaction sun4i_timer_irq = {
.dev_id = &sun4i_clockevent,
};
+static u32 sun4i_timer_sched_read(void)
+{
+ return ~readl(timer_base + TIMER_CNTVAL_REG(1));
+}
+
static void __init sun4i_timer_init(struct device_node *node)
{
unsigned long rate = 0;
@@ -117,6 +123,16 @@ static void __init sun4i_timer_init(struct device_node *node)
rate = clk_get_rate(clk);
+ writel(~0, timer_base + TIMER_INTVAL_REG(1));
+ writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD |
+ TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
+ timer_base + TIMER_CTL_REG(1));
+
+ setup_sched_clock(sun4i_timer_sched_read, 32, clk_get_rate(clk));
+ clocksource_mmio_init(timer_base + TIMER_CNTVAL_REG(1), node->name,
+ clk_get_rate(clk), 300, 32,
+ clocksource_mmio_readl_down);
+
writel(rate / (TIMER_SCAL * HZ),
timer_base + TIMER_INTVAL_REG(0));
Use the second timer found on the Allwinner SoCs as a clock source and sched clock, that were both not used yet on these platforms. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> --- drivers/clocksource/sun4i_timer.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)