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rk808:support dcdc1\2 raise voltage by step

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This commit is contained in:
张晴 2013-04-22 17:20:54 +08:00
parent b8ec179618
commit bde565f96a
1 changed files with 28 additions and 6 deletions
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34
drivers/mfd/rk808.c
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@ -39,6 +39,8 @@
#define PM_CONTROL
struct rk808 *g_rk808;
#define DCDC_RAISE_VOL_BYSTEP 1
#define DCDC_VOL_STEP 25000 //25mv
static struct mfd_cell rk808s[] = {
{
@ -413,14 +415,34 @@ static int rk808_dcdc_set_voltage(struct regulator_dev *dev,
struct rk808 *rk808 = rdev_get_drvdata(dev);
int buck = rdev_get_id(dev) - RK808_DCDC1;
u16 val;
int ret = 0;
int ret = 0,old_voltage =0,vol_temp =0;
if (buck ==2){
return 0;
}else{
val = rk808_dcdc_select_min_voltage(dev,min_uV,max_uV,buck);
ret = rk808_set_bits(rk808, rk808_BUCK_SET_VOL_REG(buck), BUCK_VOL_MASK, val);
return 0;
}else if (buck==3){
val = rk808_dcdc_select_min_voltage(dev,min_uV,max_uV,buck);
ret = rk808_set_bits(rk808, rk808_BUCK_SET_VOL_REG(buck), BUCK_VOL_MASK, val);
}
else {
#if defined(DCDC_RAISE_VOL_BYSTEP)
old_voltage = rk808_dcdc_get_voltage(dev);
if (max_uV >old_voltage){
vol_temp = old_voltage;
do{
vol_temp += DCDC_VOL_STEP;
val = rk808_dcdc_select_min_voltage(dev,vol_temp,vol_temp,buck);
// printk("rk808_dcdc_set_voltage buck = %d vol_temp= %d old_voltage= %d min_uV =%d \n",buck,vol_temp,old_voltage,min_uV);
ret = rk808_set_bits(rk808, rk808_BUCK_SET_VOL_REG(buck), BUCK_VOL_MASK, val);
}while(vol_temp != max_uV);
}
else{
val = rk808_dcdc_select_min_voltage(dev,min_uV,max_uV,buck);
ret = rk808_set_bits(rk808, rk808_BUCK_SET_VOL_REG(buck), BUCK_VOL_MASK, val);
}
#else
val = rk808_dcdc_select_min_voltage(dev,min_uV,max_uV,buck);
ret = rk808_set_bits(rk808, rk808_BUCK_SET_VOL_REG(buck), BUCK_VOL_MASK, val);
#endif
}
return ret;
}