mfd: atmel-hlcdc: Return in case of error

For HLCDC timing engine configurations bit ATMEL_HLCDC_SIP of
ATMEL_HLCDC_SR needs to be polled before applying new config. In case of
timeout there is no indicator about this, so, return in case of timeout
and also print a message about this.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/atmel-hlcdc.c

@@ -40,10 +40,17 @@ static int regmap_atmel_hlcdc_reg_write(void *context, unsigned int reg,
 
 	if (reg <= ATMEL_HLCDC_DIS) {
 		u32 status;
-
-		readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
-					  status, !(status & ATMEL_HLCDC_SIP),
-					  1, 100);
+		int ret;
+
+		ret = readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
+						status,
+						!(status & ATMEL_HLCDC_SIP),
+						1, 100);
+		if (ret) {
+			dev_err(hregmap->dev,
+				"Timeout! Clock domain synchronization is in progress!\n");
+			return ret;
+		}
 	}
 
 	writel(val, hregmap->regs + reg);