regulator: palmas: Return raw register values as the selectors in [get|set]_voltage_sel

Don't adjust the selector in [get|set]_voltage_sel, fix it in list_voltage() instead.

For smps*(except smps10), the vsel reg-value and voltage mapping as below:

reg-value       volt (uV) ( Assume RANGE is x1 )
0               0
1               500000
2               500000
3               500000
4               500000
5               500000
6               500000 (0.49V + 1 * 0.01V) * RANGE
7               510000 (0.49V + 2 * 0.01V) * RANGE
8               520000 (0.49V + 3 * 0.01V) * RANGE
9               530000 (0.49V + 4 * 0.01V) * RANGE
....

The linear mapping is start from selector 6.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
index 07aee69..151c0c4 100644 (file)
--- a/drivers/regulator/palmas-regulator.c
+++ b/drivers/regulator/palmas-regulator.c
@@ -309,19 +309,22 @@ static int palmas_list_voltage_smps(struct regulator_dev *dev,
        int id = rdev_get_id(dev);
        int mult = 1;
 
-       if (!selector)
-               return 0;
-
        /* Read the multiplier set in VSEL register to return
         * the correct voltage.
         */
        if (pmic->range[id])
                mult = 2;
 
-       /* Voltage is (0.49V + (selector * 0.01V)) * RANGE
-        * as defined in data sheet. RANGE is either x1 or x2
-        */
-       return  (490000 + (selector * 10000)) * mult;
+       if (selector == 0)
+               return 0;
+       else if (selector < 6)
+               return 500000 * mult;
+       else
+               /* Voltage is linear mapping starting from selector 6,
+                * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
+                * RANGE is either x1 or x2
+                */
+               return (490000 + ((selector - 5) * 10000)) * mult;
 }
 
 static int palmas_get_voltage_smps_sel(struct regulator_dev *dev)
@@ -338,15 +341,6 @@ static int palmas_get_voltage_smps_sel(struct regulator_dev *dev)
 
        selector = reg & PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
 
-       /* Adjust selector to match list_voltage ranges */
-       if ((selector > 0) && (selector < 6))
-               selector = 6;
-       if (!selector)
-               selector = 5;
-       if (selector > 121)
-               selector = 121;
-       selector -= 5;
-
        return selector;
 }
 
@@ -355,19 +349,15 @@ static int palmas_set_voltage_smps_sel(struct regulator_dev *dev,
 {
        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
        int id = rdev_get_id(dev);
-       unsigned int reg = 0;
-       unsigned int addr;
+       unsigned int reg, addr;
 
        addr = palmas_regs_info[id].vsel_addr;
+       reg = selector;
 
        /* Make sure we don't change the value of RANGE */
        if (pmic->range[id])
                reg |= PALMAS_SMPS12_VOLTAGE_RANGE;
 
-       /* Adjust the linux selector into range used in VSEL register */
-       if (selector)
-               reg |= selector + 5;
-
        palmas_smps_write(pmic->palmas, addr, reg);
 
        return 0;
@@ -386,11 +376,11 @@ static int palmas_map_voltage_smps(struct regulator_dev *rdev,
        if (pmic->range[id]) { /* RANGE is x2 */
                if (min_uV < 1000000)
                        min_uV = 1000000;
-               ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 1;
+               ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
        } else {                /* RANGE is x1 */
                if (min_uV < 500000)
                        min_uV = 500000;
-               ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 1;
+               ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
        }
 
        /* Map back into a voltage to verify we're still in bounds */