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authorThomas Chou <thomas@wytron.com.tw>2015-10-09 13:46:34 +0800
committerThomas Chou <thomas@wytron.com.tw>2015-10-23 07:37:03 +0800
commitc8a7ba9e6a5fe2fc7b4a7894829aa0b0148b4d40 (patch)
tree6b6ca5091a7e6927ca2c27fcec0e0b195e1a64c2 /lib/time.c
parentbcae80e9551bc0ba2d67e78bda57b9283b4bab12 (diff)
dm: implement a Timer uclass
Implement a Timer uclass to work with lib/time.c. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib/time.c')
-rw-r--r--lib/time.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/lib/time.c b/lib/time.c
index 477440de16..b001745203 100644
--- a/lib/time.c
+++ b/lib/time.c
@@ -6,6 +6,9 @@
*/
#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <timer.h>
#include <watchdog.h>
#include <div64.h>
#include <asm/io.h>
@@ -37,6 +40,52 @@ unsigned long notrace timer_read_counter(void)
extern unsigned long __weak timer_read_counter(void);
#endif
+#ifdef CONFIG_TIMER
+static int notrace dm_timer_init(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ if (!gd->timer) {
+ ret = uclass_first_device(UCLASS_TIMER, &dev);
+ if (ret)
+ return ret;
+ if (!dev)
+ return -ENODEV;
+ gd->timer = dev;
+ }
+
+ return 0;
+}
+
+ulong notrace get_tbclk(void)
+{
+ int ret;
+
+ ret = dm_timer_init();
+ if (ret)
+ return ret;
+
+ return timer_get_rate(gd->timer);
+}
+
+unsigned long notrace timer_read_counter(void)
+{
+ unsigned long count;
+ int ret;
+
+ ret = dm_timer_init();
+ if (ret)
+ return ret;
+
+ ret = timer_get_count(gd->timer, &count);
+ if (ret)
+ return ret;
+
+ return count;
+}
+#endif /* CONFIG_TIMER */
+
uint64_t __weak notrace get_ticks(void)
{
unsigned long now = timer_read_counter();