linux-kernel - [PATCH] regulator: wm831x-dcdc: Convert to use regulator_linear_range for wm831x

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Date:   Sun, 20 Jan 2019 15:33:56 +0800
From:   Axel Lin <axel.lin@...ics.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org,
        Axel Lin <axel.lin@...ics.com>
Subject: [PATCH] regulator: wm831x-dcdc: Convert to use regulator_linear_range for wm831x_buckv

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/wm831x-dcdc.c | 39 ++++++++-------------------------
 1 file changed, 9 insertions(+), 30 deletions(-)

diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index 5a5bc4bb08d2..4a573eea284a 100644
--- a/drivers/regulator/wm831x-dcdc.c
+++ b/drivers/regulator/wm831x-dcdc.c
@@ -205,33 +205,10 @@ static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data)
  * BUCKV specifics
  */
 
-static int wm831x_buckv_list_voltage(struct regulator_dev *rdev,
-				      unsigned selector)
-{
-	if (selector <= 0x8)
-		return 600000;
-	if (selector <= WM831X_BUCKV_MAX_SELECTOR)
-		return 600000 + ((selector - 0x8) * 12500);
-	return -EINVAL;
-}
-
-static int wm831x_buckv_map_voltage(struct regulator_dev *rdev,
-				   int min_uV, int max_uV)
-{
-	u16 vsel;
-
-	if (min_uV < 600000)
-		vsel = 0;
-	else if (min_uV <= 1800000)
-		vsel = DIV_ROUND_UP(min_uV - 600000, 12500) + 8;
-	else
-		return -EINVAL;
-
-	if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV)
-		return -EINVAL;
-
-	return vsel;
-}
+static const struct regulator_linear_range wm831x_buckv_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 0x7, 0),
+	REGULATOR_LINEAR_RANGE(600000, 0x8, 0x68, 12500),
+};
 
 static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
 {
@@ -309,7 +286,7 @@ static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
 	u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
 	int vsel;
 
-	vsel = wm831x_buckv_map_voltage(rdev, uV, uV);
+	vsel = regulator_map_voltage_linear_range(rdev, uV, uV);
 	if (vsel < 0)
 		return vsel;
 
@@ -368,8 +345,8 @@ static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev)
 static const struct regulator_ops wm831x_buckv_ops = {
 	.set_voltage_sel = wm831x_buckv_set_voltage_sel,
 	.get_voltage_sel = wm831x_buckv_get_voltage_sel,
-	.list_voltage = wm831x_buckv_list_voltage,
-	.map_voltage = wm831x_buckv_map_voltage,
+	.list_voltage = regulator_list_voltage_linear_range,
+	.map_voltage = regulator_map_voltage_linear_range,
 	.set_suspend_voltage = wm831x_buckv_set_suspend_voltage,
 	.set_current_limit = wm831x_buckv_set_current_limit,
 	.get_current_limit = wm831x_buckv_get_current_limit,
@@ -492,6 +469,8 @@ static int wm831x_buckv_probe(struct platform_device *pdev)
 	dcdc->desc.id = id;
 	dcdc->desc.type = REGULATOR_VOLTAGE;
 	dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1;
+	dcdc->desc.linear_ranges = wm831x_buckv_ranges;
+	dcdc->desc.n_linear_ranges = ARRAY_SIZE(wm831x_buckv_ranges);
 	dcdc->desc.ops = &wm831x_buckv_ops;
 	dcdc->desc.owner = THIS_MODULE;
 	dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
-- 
2.17.1