regulator: max8997: limit the number of dvs registers programmed in non-dvs mode

In case the gpio based volatage selection mode is not used for either of
buck 1/2/5, then only the BUCKxDVS1 register need to be programmed. So
determine whether dvs mode is used and limit the loop count appropriately.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c
index 04d9f29503a..64cf2ee38f6 100644
--- a/drivers/regulator/max8997.c
+++ b/drivers/regulator/max8997.c
@@ -941,7 +941,7 @@ static __devinit int max8997_pmic_probe(struct platform_device *pdev)
         struct regulator_dev **rdev;
         struct max8997_data *max8997;
         struct i2c_client *i2c;
-        int i, ret, size;
+        int i, ret, size, nr_dvs;
         u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
 
         if (!pdata) {
@@ -973,7 +973,10 @@ static __devinit int max8997_pmic_probe(struct platform_device *pdev)
         memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
         max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
 
-        for (i = 0; i < 8; i++) {
+        nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
+                        pdata->buck5_gpiodvs) ? 8 : 1;
+
+        for (i = 0; i < nr_dvs; i++) {
                 max8997->buck1_vol[i] = ret =
                         max8997_get_voltage_proper_val(
                                         &buck1245_voltage_map_desc,
@@ -1020,7 +1023,7 @@ static __devinit int max8997_pmic_probe(struct platform_device *pdev)
         }
 
         /* Initialize all the DVS related BUCK registers */
-        for (i = 0; i < 8; i++) {
+        for (i = 0; i < nr_dvs; i++) {
                 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
                                 max8997->buck1_vol[i],
                                 0x3f);