iio: imu: bno055: make bno055_sysfs_attr const

Add const qualifier to struct bno055_sysfs_attr and its array fields.
All of this is read-only data so it can be made const.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250628-iio-const-data-19-v1-1-a17e7c16b122@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/imu/bno055/bno055.c

@@ -114,31 +114,31 @@
 #define BNO055_UID_LEN 16
 
 struct bno055_sysfs_attr {
-	int *vals;
+	const int *vals;
 	int len;
-	int *fusion_vals;
-	int *hw_xlate;
+	const int *fusion_vals;
+	const int *hw_xlate;
 	int type;
 };
 
-static int bno055_acc_lpf_vals[] = {
+static const int bno055_acc_lpf_vals[] = {
 	7, 810000, 15, 630000, 31, 250000, 62, 500000,
 	125, 0, 250, 0, 500, 0, 1000, 0,
 };
 
-static struct bno055_sysfs_attr bno055_acc_lpf = {
+static const struct bno055_sysfs_attr bno055_acc_lpf = {
 	.vals = bno055_acc_lpf_vals,
 	.len = ARRAY_SIZE(bno055_acc_lpf_vals),
-	.fusion_vals = (int[]){62, 500000},
+	.fusion_vals = (const int[]){62, 500000},
 	.type = IIO_VAL_INT_PLUS_MICRO,
 };
 
-static int bno055_acc_range_vals[] = {
+static const int bno055_acc_range_vals[] = {
   /* G:    2,    4,    8,    16 */
 	1962, 3924, 7848, 15696
 };
 
-static struct bno055_sysfs_attr bno055_acc_range = {
+static const struct bno055_sysfs_attr bno055_acc_range = {
 	.vals = bno055_acc_range_vals,
 	.len = ARRAY_SIZE(bno055_acc_range_vals),
 	.fusion_vals = (int[]){3924}, /* 4G */
@@ -165,33 +165,33 @@ static struct bno055_sysfs_attr bno055_acc_range = {
  *     = hwval * (dps_range/(2^15 * k))
  * where k is rad-to-deg factor
  */
-static int bno055_gyr_scale_vals[] = {
+static const int bno055_gyr_scale_vals[] = {
 	125, 1877467, 250, 1877467, 500, 1877467,
 	1000, 1877467, 2000, 1877467,
 };
 
-static struct bno055_sysfs_attr bno055_gyr_scale = {
+static const struct bno055_sysfs_attr bno055_gyr_scale = {
 	.vals = bno055_gyr_scale_vals,
 	.len = ARRAY_SIZE(bno055_gyr_scale_vals),
-	.fusion_vals = (int[]){1, 900},
-	.hw_xlate = (int[]){4, 3, 2, 1, 0},
+	.fusion_vals = (const int[]){1, 900},
+	.hw_xlate = (const int[]){4, 3, 2, 1, 0},
 	.type = IIO_VAL_FRACTIONAL,
 };
 
-static int bno055_gyr_lpf_vals[] = {12, 23, 32, 47, 64, 116, 230, 523};
-static struct bno055_sysfs_attr bno055_gyr_lpf = {
+static const int bno055_gyr_lpf_vals[] = {12, 23, 32, 47, 64, 116, 230, 523};
+static const struct bno055_sysfs_attr bno055_gyr_lpf = {
 	.vals = bno055_gyr_lpf_vals,
 	.len = ARRAY_SIZE(bno055_gyr_lpf_vals),
-	.fusion_vals = (int[]){32},
-	.hw_xlate = (int[]){5, 4, 7, 3, 6, 2, 1, 0},
+	.fusion_vals = (const int[]){32},
+	.hw_xlate = (const int[]){5, 4, 7, 3, 6, 2, 1, 0},
 	.type = IIO_VAL_INT,
 };
 
-static int bno055_mag_odr_vals[] = {2, 6, 8, 10, 15, 20, 25, 30};
-static struct bno055_sysfs_attr bno055_mag_odr = {
+static const int bno055_mag_odr_vals[] = {2, 6, 8, 10, 15, 20, 25, 30};
+static const struct bno055_sysfs_attr bno055_mag_odr = {
 	.vals = bno055_mag_odr_vals,
 	.len =  ARRAY_SIZE(bno055_mag_odr_vals),
-	.fusion_vals = (int[]){20},
+	.fusion_vals = (const int[]){20},
 	.type = IIO_VAL_INT,
 };
 
@@ -548,7 +548,8 @@ static const struct iio_chan_spec bno055_channels[] = {
 };
 
 static int bno055_get_regmask(struct bno055_priv *priv, int *val, int *val2,
-			      int reg, int mask, struct bno055_sysfs_attr *attr)
+			      int reg, int mask,
+			      const struct bno055_sysfs_attr *attr)
 {
 	const int shift = __ffs(mask);
 	int hwval, idx;
@@ -577,7 +578,8 @@ static int bno055_get_regmask(struct bno055_priv *priv, int *val, int *val2,
 }
 
 static int bno055_set_regmask(struct bno055_priv *priv, int val, int val2,
-			      int reg, int mask, struct bno055_sysfs_attr *attr)
+			      int reg, int mask,
+			      const struct bno055_sysfs_attr *attr)
 {
 	const int shift = __ffs(mask);
 	int best_delta;
@@ -758,7 +760,8 @@ static int bno055_read_simple_chan(struct iio_dev *indio_dev,
 	}
 }
 
-static int bno055_sysfs_attr_avail(struct bno055_priv *priv, struct bno055_sysfs_attr *attr,
+static int bno055_sysfs_attr_avail(struct bno055_priv *priv,
+				   const struct bno055_sysfs_attr *attr,
 				   const int **vals, int *length)
 {
 	if (priv->operation_mode != BNO055_OPR_MODE_AMG) {