iio: adis: Add adis_update_bits() APIs

This patch adds a `regmap_update_bits()` like API to the ADIS library.
It provides locked and unlocked variant.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
index 2e7d0d337f8f..c539dfa3b8d3 100644
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -223,6 +223,31 @@ int __adis_read_reg(struct adis *adis, unsigned int reg,
 	return ret;
 }
 EXPORT_SYMBOL_GPL(__adis_read_reg);
+/**
+ * __adis_update_bits_base() - ADIS Update bits function - Unlocked version
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ * @size: Size of the register to update
+ *
+ * Updates the desired bits of @reg in accordance with @mask and @val.
+ */
+int __adis_update_bits_base(struct adis *adis, unsigned int reg, const u32 mask,
+			    const u32 val, u8 size)
+{
+	int ret;
+	u32 __val;
+
+	ret = __adis_read_reg(adis, reg, &__val, size);
+	if (ret)
+		return ret;
+
+	__val = (__val & ~mask) | (val & mask);
+
+	return __adis_write_reg(adis, reg, __val, size);
+}
+EXPORT_SYMBOL_GPL(__adis_update_bits_base);
 
 #ifdef CONFIG_DEBUG_FS