tty: serial: max310x: increase delay waiting for stable crystal oscil…

…lator Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
boundarydevices · May 18, 2022 · e5dfe3e · e5dfe3e
1 parent 082d007
commit e5dfe3e
Showing 1 changed file with 10 additions and 3 deletions.
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
@@ -613,11 +613,18 @@ static u32 max310x_set_ref_clk(struct device *dev, struct max310x_port *s,
 
 	/* Wait for crystal */
 	if (xtal) {
+		unsigned long delay = jiffies + msecs_to_jiffies(100);
 		unsigned int val;
-		msleep(10);
-		regmap_read(s->regmap, MAX310X_STS_IRQSTS_REG, &val);
-		if (!(val & MAX310X_STS_CLKREADY_BIT)) {
+
+		while (1) {
+			regmap_read(s->regmap, MAX310X_STS_IRQSTS_REG, &val);
+			if (val & MAX310X_STS_CLKREADY_BIT)
+				break;
+			msleep(1);
+			if (time_before(jiffies, delay))
+				continue;
 			dev_warn(dev, "clock is not stable yet\n");
+			break;
 		}
 	}