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axp8xx: Add a regnode_init method

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This method will set the desired voltaged based on values in the DTS.
It will not enable the regulator, this is the job of either a consumer
or regnode_set_constraint SYSINIT if the regulator is boot_on or always_on.

MFC after:	2 weeks
This commit is contained in:
Emmanuel Vadot 2020-01-16 19:59:00 +00:00
parent 194840a170
commit 5fcd039b3f
1 changed files with 28 additions and 0 deletions
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28
sys/arm/allwinner/axp81x.c
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@ -710,6 +710,8 @@ struct axp8xx_softc {
#define AXP_LOCK(sc) mtx_lock(&(sc)->mtx)
#define AXP_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
static int axp8xx_regnode_set_voltage(struct regnode *regnode, int min_uvolt,
int max_uvolt, int *udelay);
static int
axp8xx_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size)
@ -753,6 +755,31 @@ axp8xx_write(device_t dev, uint8_t reg, uint8_t val)
return (iicbus_transfer(dev, msg, 2));
}
static int
axp8xx_regnode_init(struct regnode *regnode)
{
struct axp8xx_reg_sc *sc;
struct regnode_std_param *param;
int rv, udelay;
sc = regnode_get_softc(regnode);
param = regnode_get_stdparam(regnode);
if (param->min_uvolt == 0)
return (0);
/*
* Set the regulator at the correct voltage
* Do not enable it, this is will be done either by a
* consumer or by regnode_set_constraint if boot_on is true
*/
rv = axp8xx_regnode_set_voltage(regnode, param->min_uvolt,
param->max_uvolt, &udelay);
if (rv != 0)
DELAY(udelay);
return (rv);
}
static int
axp8xx_regnode_enable(struct regnode *regnode, bool enable, int *udelay)
{
@ -870,6 +897,7 @@ axp8xx_regnode_get_voltage(struct regnode *regnode, int *uvolt)
static regnode_method_t axp8xx_regnode_methods[] = {
/* Regulator interface */
REGNODEMETHOD(regnode_init, axp8xx_regnode_init),
REGNODEMETHOD(regnode_enable, axp8xx_regnode_enable),
REGNODEMETHOD(regnode_set_voltage, axp8xx_regnode_set_voltage),
REGNODEMETHOD(regnode_get_voltage, axp8xx_regnode_get_voltage),