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authorAxel Lin <axel.lin@gmail.com>2012-04-11 22:58:03 +0800
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-04-17 15:25:10 +0100
commit62bc4d4a702654cf5aefbb32c766991fb45bf15a (patch)
tree430f12959e7d097f2323e121308c352e23ff2a70 /drivers/regulator/max8997.c
parent9e96b3a7ade72cb66b95f2ad3c849bab702ed87b (diff)
regulator: Convert max8997 to set_voltage_time_sel
Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/max8997.c')
-rw-r--r--drivers/regulator/max8997.c55
1 files changed, 42 insertions, 13 deletions
diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c
index 56402e87925..ec99bd30e60 100644
--- a/drivers/regulator/max8997.c
+++ b/drivers/regulator/max8997.c
@@ -489,9 +489,7 @@ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
const struct voltage_map_desc *desc;
int rid = rdev_get_id(rdev);
- int reg, shift = 0, mask, ret;
- int i;
- u8 org;
+ int i, reg, shift, mask, ret;
switch (rid) {
case MAX8997_LDO1 ... MAX8997_LDO21:
@@ -520,21 +518,50 @@ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
if (ret)
return ret;
- max8997_read_reg(i2c, reg, &org);
- org = (org & mask) >> shift;
-
ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
*selector = i;
- if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
- rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
- /* If the voltage is increasing */
- if (org < i)
- udelay(DIV_ROUND_UP(desc->step * (i - org),
- max8997->ramp_delay));
+ return ret;
+}
+
+static int max8997_set_voltage_ldobuck_time_sel(struct regulator_dev *rdev,
+ unsigned int old_selector,
+ unsigned int new_selector)
+{
+ struct max8997_data *max8997 = rdev_get_drvdata(rdev);
+ int rid = rdev_get_id(rdev);
+ const struct voltage_map_desc *desc = reg_voltage_map[rid];
+
+ /* Delay is required only if the voltage is increasing */
+ if (old_selector >= new_selector)
+ return 0;
+
+ /* No need to delay if gpio_dvs_mode */
+ switch (rid) {
+ case MAX8997_BUCK1:
+ if (max8997->buck1_gpiodvs)
+ return 0;
+ break;
+ case MAX8997_BUCK2:
+ if (max8997->buck2_gpiodvs)
+ return 0;
+ break;
+ case MAX8997_BUCK5:
+ if (max8997->buck5_gpiodvs)
+ return 0;
+ break;
+ }
+
+ switch (rid) {
+ case MAX8997_BUCK1:
+ case MAX8997_BUCK2:
+ case MAX8997_BUCK4:
+ case MAX8997_BUCK5:
+ return DIV_ROUND_UP(desc->step * (new_selector - old_selector),
+ max8997->ramp_delay);
}
- return ret;
+ return 0;
}
/*
@@ -780,6 +807,7 @@ static struct regulator_ops max8997_ldo_ops = {
.disable = max8997_reg_disable,
.get_voltage_sel = max8997_get_voltage_sel,
.set_voltage = max8997_set_voltage_ldobuck,
+ .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel,
.set_suspend_enable = max8997_reg_enable_suspend,
.set_suspend_disable = max8997_reg_disable_suspend,
};
@@ -791,6 +819,7 @@ static struct regulator_ops max8997_buck_ops = {
.disable = max8997_reg_disable,
.get_voltage_sel = max8997_get_voltage_sel,
.set_voltage = max8997_set_voltage_buck,
+ .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel,
.set_suspend_enable = max8997_reg_enable_suspend,
.set_suspend_disable = max8997_reg_disable_suspend,
};