[PATCH 4/4] lib: utils: Improve fdt_timer

[Xiang W]

Remove dummy driver. Optimize fdt_timer_cold_init to exit the
loop early.

Signed-off-by: Xiang W <wxjstz at 126.com>
---
 lib/utils/timer/fdt_timer.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/lib/utils/timer/fdt_timer.c b/lib/utils/timer/fdt_timer.c
index 4695c0f..02cfa35 100644
--- a/lib/utils/timer/fdt_timer.c
+++ b/lib/utils/timer/fdt_timer.c
@@ -16,24 +16,17 @@
 extern struct fdt_timer *fdt_timer_drivers[];
 extern unsigned long fdt_timer_drivers_size;
 
-static struct fdt_timer dummy = {
-	.match_table = NULL,
-	.cold_init = NULL,
-	.warm_init = NULL,
-	.exit = NULL,
-};
-
-static struct fdt_timer *current_driver = &dummy;
+static struct fdt_timer *current_driver = NULL;
 
 void fdt_timer_exit(void)
 {
-	if (current_driver->exit)
+	if (current_driver && current_driver->exit)
 		current_driver->exit();
 }
 
 static int fdt_timer_warm_init(void)
 {
-	if (current_driver->warm_init)
+	if (current_driver && current_driver->warm_init)
 		return current_driver->warm_init();
 	return 0;
 }
@@ -59,13 +52,11 @@ static int fdt_timer_cold_init(void)
 					return rc;
 			}
 			current_driver = drv;
+			return 0;
 		}
-
-		if (current_driver != &dummy)
-			break;
 	}
 
-	return 0;
+	return SBI_ENODEV;
 }
 
 int fdt_timer_init(bool cold_boot)
-- 
2.39.2