iio: accel: mma9553: comment and error message fixes

Use "GPIO" instead of "gpio" and "ACPI" instead of "acpi".

Includes a couple of small style fixes in comments
(missing full stop, whitespace, paranthesis).

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Suggested-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/accel/mma9553.c

@@ -75,8 +75,8 @@
 #define MMA9553_DEFAULT_GPIO_PIN	mma9551_gpio6
 #define MMA9553_DEFAULT_GPIO_POLARITY	0
 
-/* Bitnum used for gpio configuration = bit number in high status byte */
 #define STATUS_TO_BITNUM(bit)		(ffs(bit) - 9)
+/* Bitnum used for GPIO configuration = bit number in high status byte */
 
 #define MMA9553_DEFAULT_SAMPLE_RATE	30	/* Hz */
 
@@ -401,13 +401,13 @@ static int mma9553_init(struct mma9553_data *data)
 				      sizeof(data->conf), (u16 *) &data->conf);
 	if (ret < 0) {
 		dev_err(&data->client->dev,
-			"device is not MMA9553L: failed to read cfg regs\n");
+			"failed to read configuration registers\n");
 		return ret;
 	}
 
 
-	/* Reset gpio */
 	data->gpio_bitnum = -1;
+	/* Reset GPIO */
 	ret = mma9553_conf_gpio(data);
 	if (ret < 0)
 		return ret;
@@ -459,7 +459,8 @@ static int mma9553_read_raw(struct iio_dev *indio_dev,
 			 * The HW only counts steps and other dependent
 			 * parameters (speed, distance, calories, activity)
 			 * if power is on (from enabling an event or the
-			 * step counter */
+			 * step counter).
+			 */
 			powered_on =
 			    mma9553_is_any_event_enabled(data, false, 0) ||
 			    data->stepcnt_enabled;
@@ -899,7 +900,7 @@ static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
 	gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
 	/*
 	 * HW expects 0 for female and 1 for male,
-	 * while iio index is 0 for male and 1 for female
+	 * while iio index is 0 for male and 1 for female.
 	 */
 	return !gender;
 }
@@ -1111,16 +1112,16 @@ static int mma9553_gpio_probe(struct i2c_client *client)
 
 	dev = &client->dev;
 
-	/* data ready gpio interrupt pin */
+	/* data ready GPIO interrupt pin */
 	gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
 	if (IS_ERR(gpio)) {
-		dev_err(dev, "acpi gpio get index failed\n");
+		dev_err(dev, "ACPI GPIO get index failed\n");
 		return PTR_ERR(gpio);
 	}
 
 	ret = gpiod_to_irq(gpio);
 
-	dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+	dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
 
 	return ret;
 }