iio: pressure: bmp280: Constify struct regmap_bus

`bmp280_regmap_bus` and `bmp380_regmap_bus` are conditionally assigned
to `bmp_regmap_bus`, which is only used to pass the struct as a
read-only member.

Add the const modifier to the structs and the pointer to move the data
to a read-only section.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Tested-By: Vasileios Amoiridis <vassilisamir@gmail.com>
Link: https://patch.msgid.link/20240703-iio-cont-regmap_bus-v1-10-34754f355b65@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/pressure/bmp280-spi.c b/drivers/iio/pressure/bmp280-spi.c
index 62b4e58104cf98553d8c586f4ffccc7aa8b6c4a1..fee266d4e055bb3fcf25c2cb461bbd0a65bc4819 100644 (file)
--- a/drivers/iio/pressure/bmp280-spi.c
+++ b/drivers/iio/pressure/bmp280-spi.c
@@ -64,14 +64,14 @@ static int bmp380_regmap_spi_read(void *context, const void *reg,
        return 0;
 }
 
-static struct regmap_bus bmp280_regmap_bus = {
+static const struct regmap_bus bmp280_regmap_bus = {
        .write = bmp280_regmap_spi_write,
        .read = bmp280_regmap_spi_read,
        .reg_format_endian_default = REGMAP_ENDIAN_BIG,
        .val_format_endian_default = REGMAP_ENDIAN_BIG,
 };
 
-static struct regmap_bus bmp380_regmap_bus = {
+static const struct regmap_bus bmp380_regmap_bus = {
        .write = bmp280_regmap_spi_write,
        .read = bmp380_regmap_spi_read,
        .read_flag_mask = BIT(7),
@@ -83,7 +83,7 @@ static int bmp280_spi_probe(struct spi_device *spi)
 {
        const struct spi_device_id *id = spi_get_device_id(spi);
        const struct bmp280_chip_info *chip_info;
-       struct regmap_bus *bmp_regmap_bus;
+       struct regmap_bus const *bmp_regmap_bus;
        struct regmap *regmap;
        int ret;