[PATCH v2] regulator: lp873x: Use bitfield helpers

[Geert Uytterhoeven]

Use the FIELD_PREP() helper, instead open-coding the same operation.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Acked-by: Mark Brown <broonie@xxxxxxxxxx>
---
Compile-tested only.

v2:
  - Add Acked-by.
---
 drivers/regulator/lp873x-regulator.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/lp873x-regulator.c b/drivers/regulator/lp873x-regulator.c
index 8dfdd1db20709e18..84a134cfcd9c98d7 100644
--- a/drivers/regulator/lp873x-regulator.c
+++ b/drivers/regulator/lp873x-regulator.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/
  */
 
+#include <linux/bitfield.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
@@ -93,7 +94,7 @@ static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev,
 
 	ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg,
 				 LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE,
-				 reg << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE));
+				 FIELD_PREP(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE, reg));
 	if (ret) {
 		dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret);
 		return ret;
-- 
2.34.1