Currently this timer driver provides timer_get_boot_us() to support the
BOOTSTAGE functionality. This patch adds the timer_early functions so
that the "normal" timer functions can be used, when CONFIG_TIMER_EARLY
is enabled.
timer_get_boot_us() will get removed in a follow-up patch, once the
BOOTSTAGE interface is migrated to timer_get_us().
Signed-off-by: Stefan Roese <s...@denx.de>
Cc: Kever Yang <kever.y...@rock-chips.com>
Cc: Philipp Tomsich <philipp.toms...@theobroma-systems.com>
---
drivers/timer/rockchip_timer.c | 50 ++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/drivers/timer/rockchip_timer.c b/drivers/timer/rockchip_timer.c
index 62eacb986890..6e3483edce72 100644
--- a/drivers/timer/rockchip_timer.c
+++ b/drivers/timer/rockchip_timer.c
@@ -87,6 +87,56 @@ ulong timer_get_boot_us(void)
}
#endif
+static u64 timer_early_get_count_rate(uint32_t *rate)
+{
+ uint64_t ticks = 0;
+
+ *rate = 1;
+ if (CONFIG_IS_ENABLED(OF_REAL)) {
+ /* We have been called so early that the DM is not ready,... */
+ ofnode node = offset_to_ofnode(-1);
+ struct rk_timer *timer = NULL;
+
+ /*
+ * ... so we try to access the raw timer, if it is specified
+ * via the tick-timer property in /chosen.
+ */
+ node = ofnode_get_chosen_node("tick-timer");
+ if (!ofnode_valid(node)) {
+ debug("%s: no /chosen/tick-timer\n", __func__);
+ return 0;
+ }
+
+ timer = (struct rk_timer *)ofnode_get_addr(node);
+
+ /* This timer is down-counting */
+ ticks = ~0ULL - rockchip_timer_get_curr_value(timer);
+ if (ofnode_read_u32(node, "clock-frequency", rate)) {
+ debug("%s: could not read clock-frequency\n", __func__);
+ return 0;
+ }
+ } else {
+ return 0;
+ }
+
+ return ticks;
+}
+
+unsigned long notrace timer_early_get_rate(void)
+{
+ uint32_t rate;
+
+ timer_early_get_count_rate(&rate);
+ return rate;
+}
+
+u64 notrace timer_early_get_count(void)
+{
+ uint32_t rate;
+
+ return timer_early_get_count_rate(&rate);
+}
+
static u64 rockchip_timer_get_count(struct udevice *dev)
{
struct rockchip_timer_priv *priv = dev_get_priv(dev);
--
2.37.3
