pwm: pca9685: clarify pca9685_set_sleep_mode() interface.

The function
static void pca9685_set_sleep_mode(struct pca9685 *pca, int sleep)
takes the chip in and out of sleep mode, depending on the value of
sleep, which is interpreted as a boolean.

To clarify that 'int sleep' is a boolean and not a sleep delay,
change the function interface to:
static void pca9685_set_sleep_mode(struct pca9685 *pca, bool enable)

Suggested-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Sven Van Asbroeck <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/pwm/pwm-pca9685.c

···
 }
 #endif
 
-static void pca9685_set_sleep_mode(struct pca9685 *pca, int sleep)
+static void pca9685_set_sleep_mode(struct pca9685 *pca, bool enable)
 {
 	regmap_update_bits(pca->regmap, PCA9685_MODE1,
-			   MODE1_SLEEP, sleep ? MODE1_SLEEP : 0);
-	if (!sleep) {
+			   MODE1_SLEEP, enable ? MODE1_SLEEP : 0);
+	if (!enable) {
 		/* Wait 500us for the oscillator to be back up */
 		udelay(500);
 	}
···
 			 * state is guaranteed active here.
 			 */
 			/* Put chip into sleep mode */
-			pca9685_set_sleep_mode(pca, 1);
+			pca9685_set_sleep_mode(pca, true);
 
 			/* Change the chip-wide output frequency */
 			regmap_write(pca->regmap, PCA9685_PRESCALE, prescale);
 
 			/* Wake the chip up */
-			pca9685_set_sleep_mode(pca, 0);
+			pca9685_set_sleep_mode(pca, false);
 
 			pca->period_ns = period_ns;
 		} else {
···
 	struct i2c_client *client = to_i2c_client(dev);
 	struct pca9685 *pca = i2c_get_clientdata(client);
 
-	pca9685_set_sleep_mode(pca, 1);
+	pca9685_set_sleep_mode(pca, true);
 	return 0;
 }
 
···
 	struct i2c_client *client = to_i2c_client(dev);
 	struct pca9685 *pca = i2c_get_clientdata(client);
 
-	pca9685_set_sleep_mode(pca, 0);
+	pca9685_set_sleep_mode(pca, false);
 	return 0;
 }
 #endif