Make wait_for_ready available for all

wait_for_ready is a generic function which loops until bits in a
register are set. This patch move it to util.c to make it available
for all.

There are more places where the function is applicable but this CL
keeps the scope under chip/stm32/clock-stm32. There is no
functionality change.

BUG=none
BRANCH=none
TEST=buildall

Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Change-Id: I796599344c1d86ab7144d1d6b434ec54cf1cc55d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2317887
Reviewed-by: Scott Collyer <scollyer@chromium.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/test/interrupt.c b/test/interrupt.c
index f43c8b2ccd..ca98309e1f 100644
--- a/test/interrupt.c
+++ b/test/interrupt.c
@@ -29,11 +29,20 @@ void my_isr(void)
 	interrupt_count++;
 }
 
+static volatile uint32_t enable_ready_reg;
+
+static void set_ready_bit(void)
+{
+	if (enable_ready_reg & BIT(0))
+		enable_ready_reg |= BIT(1);
+}
+
 void interrupt_generator(void)
 {
 	while (1) {
 		udelay(3 * PERIOD_US(prng_no_seed()));
 		task_trigger_test_interrupt(my_isr);
+		task_trigger_test_interrupt(set_ready_bit);
 	}
 }
 
@@ -71,12 +80,21 @@ static int interrupt_disable_test(void)
 	return EC_SUCCESS;
 }
 
+static int test_wait_for_ready(void)
+{
+	wait_for_ready(&enable_ready_reg, BIT(0), BIT(1));
+	TEST_EQ(enable_ready_reg, BIT(0) | BIT(1), "%x");
+
+	return EC_SUCCESS;
+}
+
 void run_test(int argc, char **argv)
 {
 	test_reset();
 
 	RUN_TEST(interrupt_test);
 	RUN_TEST(interrupt_disable_test);
+	RUN_TEST(test_wait_for_ready);
 
 	test_print_result();
 }