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regulator_fixed: Add a get_voltage method

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Some consumer cannot know the voltage of the regulator without it.
While here, refuse to attach is min_voltage != max_voltage, it
shouldn't happens anyway.

Reviewed by:	mmel
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D23003
This commit is contained in:
Emmanuel Vadot 2020-01-16 20:52:26 +00:00
parent 2fbeda2aef
commit 42d3cf0f82
1 changed files with 16 additions and 0 deletions
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16
sys/dev/extres/regulator/regulator_fixed.c
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@ -73,6 +73,7 @@ static int regnode_fixed_enable(struct regnode *regnode, bool enable,
int *udelay);
static int regnode_fixed_status(struct regnode *regnode, int *status);
static int regnode_fixed_stop(struct regnode *regnode, int *udelay);
static int regnode_fixed_get_voltage(struct regnode *regnode, int *uvolt);
static regnode_method_t regnode_fixed_methods[] = {
/* Regulator interface */
@ -80,6 +81,7 @@ static regnode_method_t regnode_fixed_methods[] = {
REGNODEMETHOD(regnode_enable, regnode_fixed_enable),
REGNODEMETHOD(regnode_status, regnode_fixed_status),
REGNODEMETHOD(regnode_stop, regnode_fixed_stop),
REGNODEMETHOD(regnode_get_voltage, regnode_fixed_get_voltage),
REGNODEMETHOD(regnode_check_voltage, regnode_method_check_voltage),
REGNODEMETHOD_END
};
@ -280,6 +282,16 @@ regnode_fixed_status(struct regnode *regnode, int *status)
return (rv);
}
static int
regnode_fixed_get_voltage(struct regnode *regnode, int *uvolt)
{
struct regnode_fixed_sc *sc;
sc = regnode_get_softc(regnode);
*uvolt = sc->param->min_uvolt;
return (0);
}
int
regnode_fixed_register(device_t dev, struct regnode_fixed_init_def *init_def)
{
@ -382,6 +394,10 @@ regfix_parse_fdt(struct regfix_softc * sc)
return(rv);
}
if (init_def->std_param.min_uvolt != init_def->std_param.max_uvolt) {
device_printf(sc->dev, "min_uvolt != max_uvolt\n");
return (ENXIO);
}
/* Fixed regulator uses 'startup-delay-us' property for enable_delay */
rv = OF_getencprop(node, "startup-delay-us",
&init_def->std_param.enable_delay,