linux-kernel - [PATCH v4 2/7] regulator: qcom_spmi: Refactor get_mode/set

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Date:   Thu, 13 Jun 2019 14:25:31 -0700
From:   Jeffrey Hugo <jeffrey.l.hugo@...il.com>
To:     lgirdwood@...il.com, broonie@...nel.org
Cc:     agross@...nel.org, bjorn.andersson@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Subject: [PATCH v4 2/7] regulator: qcom_spmi: Refactor get_mode/set_mode

spmi_regulator_common_get_mode and spmi_regulator_common_set_mode use
multi-level ifs which mirror a switch statement.  Refactor to use a switch
statement to make the code flow more clear.

Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>
---
 drivers/regulator/qcom_spmi-regulator.c | 26 +++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c
index 42c429d50743..1b3383a24c9d 100644
--- a/drivers/regulator/qcom_spmi-regulator.c
+++ b/drivers/regulator/qcom_spmi-regulator.c
@@ -911,13 +911,16 @@ static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
 
 	spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);
 
-	if (reg & SPMI_COMMON_MODE_HPM_MASK)
-		return REGULATOR_MODE_NORMAL;
+	reg &= SPMI_COMMON_MODE_HPM_MASK | SPMI_COMMON_MODE_AUTO_MASK;
 
-	if (reg & SPMI_COMMON_MODE_AUTO_MASK)
+	switch (reg) {
+	case SPMI_COMMON_MODE_HPM_MASK:
+		return REGULATOR_MODE_NORMAL;
+	case SPMI_COMMON_MODE_AUTO_MASK:
 		return REGULATOR_MODE_FAST;
-
-	return REGULATOR_MODE_IDLE;
+	default:
+		return REGULATOR_MODE_IDLE;
+	}
 }
 
 static int
@@ -925,12 +928,19 @@ spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
 {
 	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 	u8 mask = SPMI_COMMON_MODE_HPM_MASK | SPMI_COMMON_MODE_AUTO_MASK;
-	u8 val = 0;
+	u8 val;
 
-	if (mode == REGULATOR_MODE_NORMAL)
+	switch (mode) {
+	case REGULATOR_MODE_NORMAL:
 		val = SPMI_COMMON_MODE_HPM_MASK;
-	else if (mode == REGULATOR_MODE_FAST)
+		break;
+	case REGULATOR_MODE_FAST:
 		val = SPMI_COMMON_MODE_AUTO_MASK;
+		break;
+	default:
+		val = 0;
+		break;
+	}
 
 	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
 }
-- 
2.17.1