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dm: regulator: add "regulator-ramp-delay" support 

Change-Id: Ic5bc78b2688b88d726c54dfff4f790746d92966b
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
This commit is contained in:
Joseph Chen 2018-03-25 11:13:12 +08:00 committed by Kever Yang
parent f2d1698c73
commit b29e2b63a9
2 changed files with 45 additions and 2 deletions
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37
drivers/power/regulator/regulator-uclass.c
View File

@ -42,6 +42,8 @@ int regulator_set_value(struct udevice *dev, int uV)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
struct dm_regulator_uclass_platdata *uc_pdata;
u32 old_uV = -ENODATA, us;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
@ -52,7 +54,24 @@ int regulator_set_value(struct udevice *dev, int uV)
if (!ops || !ops->set_value)
return -ENOSYS;
return ops->set_value(dev, uV);
if (uc_pdata->ramp_delay != -ENODATA) {
if (!ops->get_value)
return -ENOSYS;
old_uV = ops->get_value(dev);
if (old_uV < 0)
return -EINVAL;
}
ret = ops->set_value(dev, uV);
if (!ret && (old_uV != -ENODATA) && (old_uV != uV)) {
us = DIV_ROUND_UP(abs(uV - old_uV), uc_pdata->ramp_delay);
udelay(us);
debug("%s: ramp=%d, old_uV=%d, uV=%d, us=%d\n",
uc_pdata->name, uc_pdata->ramp_delay, old_uV, uV, us);
}
return ret;
}
int regulator_set_suspend_value(struct udevice *dev, int uV)
@ -136,6 +155,16 @@ int regulator_set_suspend_enable(struct udevice *dev, bool enable)
return ops->set_suspend_enable(dev, enable);
}
int regulator_set_ramp_delay(struct udevice *dev, u32 ramp_delay)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->set_ramp_delay)
return -ENOSYS;
return ops->set_ramp_delay(dev, ramp_delay);
}
int regulator_get_mode(struct udevice *dev)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
@ -202,6 +231,9 @@ int regulator_autoset(struct udevice *dev)
uc_pdata = dev_get_uclass_platdata(dev);
if (uc_pdata->ramp_delay != -ENODATA)
regulator_set_ramp_delay(dev, uc_pdata->ramp_delay);
ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on);
if (!ret && uc_pdata->suspend_on)
ret = regulator_set_suspend_value(dev, uc_pdata->suspend_uV);
@ -352,7 +384,8 @@ static int regulator_pre_probe(struct udevice *dev)
-ENODATA);
uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
-ENODATA);
node = dev_read_subnode(dev, "regulator-state-mem");
if (ofnode_valid(node)) {
uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend");

10
include/power/regulator.h
View File

@ -179,6 +179,7 @@ struct dm_regulator_uclass_platdata {
u8 volt_reg;
bool suspend_on;
u32 suspend_uV;
u32 ramp_delay;
};
/* Regulator device operations */
@ -237,6 +238,15 @@ struct dm_regulator_ops {
*/
int (*get_mode)(struct udevice *dev);
int (*set_mode)(struct udevice *dev, int mode_id);
/**
* The regulator voltage set ramp delay
*
* @dev - regulator device
* @ramp_delay - ramp delay [uV/uS]
* @return zero on success and other failed.
*/
int (*set_ramp_delay)(struct udevice *dev, u32 ramp_delay);
};
/**