regulator: wm831x-ldo: Convert to use linear ranges

Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 24 insertions, 80 deletions

diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c
index 9ff883f80878..76792c7d86f3 100644
--- a/drivers/regulator/wm831x-ldo.c
+++ b/drivers/regulator/wm831x-ldo.c
@@ -62,41 +62,12 @@ static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
  * General purpose LDOs
  */
 
-#define WM831X_GP_LDO_SELECTOR_LOW 0xe
-#define WM831X_GP_LDO_MAX_SELECTOR 0x1f
-
-static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
-                                      unsigned int selector)
-{
-        /* 0.9-1.6V in 50mV steps */
-        if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
-                return 900000 + (selector * 50000);
-        /* 1.7-3.3V in 100mV steps */
-        if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
-                return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
-                                  * 100000);
-        return -EINVAL;
-}
-
-static int wm831x_gp_ldo_map_voltage(struct regulator_dev *rdev,
-                                     int min_uV, int max_uV)
-{
-        int volt, vsel;
-
-        if (min_uV < 900000)
-                vsel = 0;
-        else if (min_uV < 1700000)
-                vsel = ((min_uV - 900000) / 50000);
-        else
-                vsel = ((min_uV - 1700000) / 100000)
-                        + WM831X_GP_LDO_SELECTOR_LOW + 1;
-
-        volt = wm831x_gp_ldo_list_voltage(rdev, vsel);
-        if (volt < min_uV || volt > max_uV)
-                return -EINVAL;
-
-        return vsel;
-}
+static const struct regulator_linear_range wm831x_gp_ldo_ranges[] = {
+        { .min_uV =  900000, .max_uV = 1650000, .min_sel =  0, .max_sel = 14,
+          .uV_step =  50000 },
+        { .min_uV = 1700000, .max_uV = 3300000, .min_sel = 15, .max_sel = 31,
+          .uV_step = 100000 },
+};
 
 static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
                                              int uV)
@@ -105,7 +76,7 @@ static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
         struct wm831x *wm831x = ldo->wm831x;
         int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
 
-        sel = wm831x_gp_ldo_map_voltage(rdev, uV, uV);
+        sel = regulator_map_voltage_linear_range(rdev, uV, uV);
         if (sel < 0)
                 return sel;
 
@@ -230,8 +201,8 @@ static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
 
 
 static struct regulator_ops wm831x_gp_ldo_ops = {
-        .list_voltage = wm831x_gp_ldo_list_voltage,
-        .map_voltage = wm831x_gp_ldo_map_voltage,
+        .list_voltage = regulator_list_voltage_linear_range,
+        .map_voltage = regulator_map_voltage_linear_range,
         .get_voltage_sel = regulator_get_voltage_sel_regmap,
         .set_voltage_sel = regulator_set_voltage_sel_regmap,
         .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
@@ -290,7 +261,7 @@ static int wm831x_gp_ldo_probe(struct platform_device *pdev)
 
         ldo->desc.id = id;
         ldo->desc.type = REGULATOR_VOLTAGE;
-        ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
+        ldo->desc.n_voltages = 32;
         ldo->desc.ops = &wm831x_gp_ldo_ops;
         ldo->desc.owner = THIS_MODULE;
         ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
@@ -299,6 +270,8 @@ static int wm831x_gp_ldo_probe(struct platform_device *pdev)
         ldo->desc.enable_mask = 1 << id;
         ldo->desc.bypass_reg = ldo->base;
         ldo->desc.bypass_mask = WM831X_LDO1_SWI;
+        ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
+        ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);
 
         config.dev = pdev->dev.parent;
         if (pdata)
@@ -358,43 +331,12 @@ static struct platform_driver wm831x_gp_ldo_driver = {
  * Analogue LDOs
  */
 
-
-#define WM831X_ALDO_SELECTOR_LOW 0xc
-#define WM831X_ALDO_MAX_SELECTOR 0x1f
-
-static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
-                                      unsigned int selector)
-{
-        /* 1-1.6V in 50mV steps */
-        if (selector <= WM831X_ALDO_SELECTOR_LOW)
-                return 1000000 + (selector * 50000);
-        /* 1.7-3.5V in 100mV steps */
-        if (selector <= WM831X_ALDO_MAX_SELECTOR)
-                return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
-                                  * 100000);
-        return -EINVAL;
-}
-
-static int wm831x_aldo_map_voltage(struct regulator_dev *rdev,
-                                   int min_uV, int max_uV)
-{
-        int volt, vsel;
-
-        if (min_uV < 1000000)
-                vsel = 0;
-        else if (min_uV < 1700000)
-                vsel = ((min_uV - 1000000) / 50000);
-        else
-                vsel = ((min_uV - 1700000) / 100000)
-                        + WM831X_ALDO_SELECTOR_LOW + 1;
-
-        volt = wm831x_aldo_list_voltage(rdev, vsel);
-        if (volt < min_uV || volt > max_uV)
-                return -EINVAL;
-
-        return vsel;
-
-}
+static const struct regulator_linear_range wm831x_aldo_ranges[] = {
+        { .min_uV = 1000000, .max_uV = 1650000, .min_sel =  0, .max_sel = 12,
+          .uV_step =  50000 },
+        { .min_uV = 1700000, .max_uV = 3500000, .min_sel = 13, .max_sel = 31,
+          .uV_step = 100000 },
+};
 
 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
                                              int uV)
@@ -403,7 +345,7 @@ static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
         struct wm831x *wm831x = ldo->wm831x;
         int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
 
-        sel = wm831x_aldo_map_voltage(rdev, uV, uV);
+        sel = regulator_map_voltage_linear_range(rdev, uV, uV);
         if (sel < 0)
                 return sel;
 
@@ -486,8 +428,8 @@ static int wm831x_aldo_get_status(struct regulator_dev *rdev)
 }
 
 static struct regulator_ops wm831x_aldo_ops = {
-        .list_voltage = wm831x_aldo_list_voltage,
-        .map_voltage = wm831x_aldo_map_voltage,
+        .list_voltage = regulator_list_voltage_linear_range,
+        .map_voltage = regulator_map_voltage_linear_range,
         .get_voltage_sel = regulator_get_voltage_sel_regmap,
         .set_voltage_sel = regulator_set_voltage_sel_regmap,
         .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
@@ -545,7 +487,9 @@ static int wm831x_aldo_probe(struct platform_device *pdev)
 
         ldo->desc.id = id;
         ldo->desc.type = REGULATOR_VOLTAGE;
-        ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
+        ldo->desc.n_voltages = 32;
+        ldo->desc.linear_ranges = wm831x_aldo_ranges;
+        ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);
         ldo->desc.ops = &wm831x_aldo_ops;
         ldo->desc.owner = THIS_MODULE;
         ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;