[PATCH v2 02/10] regulator: core: Fix regulator_is_supported_voltage() kerneldoc return value

[Chen-Yu Tsai <wenst@chromium.org>]

The kerneldoc for regulator_is_supported_voltage() states that the
return value is a boolean. That is not correct, as it could return an
error number if the check failed.

Fix the description by expanding it to cover the valid return values and
error conditions. The description is also converted to a proper "Return"
section.

Fixes: c5f3939b8fe0 ("regulator: core: Support fixed voltages in regulator_is_supported_voltage()")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
Changes since v1:
- Replaced "true, false" in commit message with "valid return values"
- Added articles ("the", "a") to the description based on surrounding
  and function implementation context
---
 drivers/regulator/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 763048d6f1ed..0ce3fe1774fe 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3456,7 +3456,9 @@ EXPORT_SYMBOL_GPL(regulator_get_linear_step);
  * @min_uV: Minimum required voltage in uV.
  * @max_uV: Maximum required voltage in uV.
  *
- * Returns a boolean.
+ * Return: 1 if the voltage range is supported, 0 if not, or a negative error
+ *	   number if @regulator's voltage can't be changed and voltage readback
+ *	   failed.
  */
 int regulator_is_supported_voltage(struct regulator *regulator,
 				   int min_uV, int max_uV)
-- 
2.46.0.295.g3b9ea8a38a-goog