diff options
| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2021-02-08 20:18:24 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2021-02-10 10:14:29 +0100 |
| commit | 6ee83ce08b24ed66dd24b7bc572a363ff95b4d6c (patch) | |
| tree | 1e1f01b2ec20b8ff249eacac02926cc94b74aed6 /drivers/regulator/core.c | |
| parent | f38f34a2f41e5981f2995231d94688d31104befc (diff) | |
| download | barebox-6ee83ce08b24ed66dd24b7bc572a363ff95b4d6c.tar.gz barebox-6ee83ce08b24ed66dd24b7bc572a363ff95b4d6c.tar.xz | |
regulator: add regulator_get_voltage() to API
ADC drivers need to query their reference regulator's voltage to
format their raw readings. Provide regulator_get_voltage() so ADC
drivers need not hardcode a reference voltage. Regulator drivers
that don't support this (i.e. nearly everything in-tree) will
have the function return with -EINVAL.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 6ea21a4609..7ced283c11 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -176,6 +176,9 @@ int of_regulator_register(struct regulator_dev *rd, struct device_node *node) ri->node = node; + if (rd->desc->fixed_uV && rd->desc->n_voltages == 1) + ri->min_uv = ri->max_uv = rd->desc->fixed_uV; + of_property_read_u32(node, "regulator-enable-ramp-delay", &ri->enable_time_us); of_property_read_u32(node, "regulator-min-microvolt", @@ -539,6 +542,30 @@ void regulator_bulk_free(int num_consumers, } EXPORT_SYMBOL_GPL(regulator_bulk_free); +int regulator_get_voltage(struct regulator *regulator) +{ + struct regulator_dev *rdev = regulator->ri->rdev; + int sel, ret; + + if (rdev->desc->ops->get_voltage_sel) { + sel = rdev->desc->ops->get_voltage_sel(rdev); + if (sel < 0) + return sel; + ret = rdev->desc->ops->list_voltage(rdev, sel); + } else if (rdev->desc->ops->get_voltage) { + ret = rdev->desc->ops->get_voltage(rdev); + } else if (rdev->desc->ops->list_voltage) { + ret = rdev->desc->ops->list_voltage(rdev, 0); + } else if (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1)) { + ret = rdev->desc->fixed_uV; + } else { + return -EINVAL; + } + + return ret; +} +EXPORT_SYMBOL_GPL(regulator_get_voltage_rdev); + static void regulator_print_one(struct regulator_internal *ri) { struct regulator *r; |