Re: [PATCH 3/5] regulator: da9062: add voltage selection gpio support

From: Marco Felsch
Date: Wed Sep 25 2019 - 12:00:06 EST

Hi Adam,

On 19-09-24 09:48, Adam Thomson wrote:
> On 17 September 2019 13:43, Marco Felsch wrote:
>
> > The DA9062/1 devices can switch their regulator voltages between
> > voltage-A (active) and voltage-B (suspend) settings. Switching the
> > voltages can be controlled by ther internal state-machine or by a gpio
> > input signal and can be configured for each individual regulator. This
> > commit adds the gpio-based voltage switching support.
> >
> > Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
> > ---
> > drivers/regulator/da9062-regulator.c | 149 +++++++++++++++++++++++++++
> > 1 file changed, 149 insertions(+)
> >
> > diff --git a/drivers/regulator/da9062-regulator.c b/drivers/regulator/da9062-
> > regulator.c
> > index 9b2ca472f70c..9d6eb7625948 100644
> > --- a/drivers/regulator/da9062-regulator.c
> > +++ b/drivers/regulator/da9062-regulator.c
> > @@ -7,6 +7,7 @@
> > #include <linux/module.h>
> > #include <linux/init.h>
> > #include <linux/err.h>
> > +#include <linux/gpio/consumer.h>
> > #include <linux/slab.h>
> > #include <linux/of.h>
> > #include <linux/platform_device.h>
> > @@ -15,6 +16,7 @@
> > #include <linux/regulator/machine.h>
> > #include <linux/regulator/of_regulator.h>
> > #include <linux/mfd/da9062/core.h>
> > +#include <linux/mfd/da9062/gpio.h>
> > #include <linux/mfd/da9062/registers.h>
> >
> > /* Regulator IDs */
> > @@ -50,6 +52,7 @@ struct da9062_regulator_info {
> > struct reg_field sleep;
> > struct reg_field suspend_sleep;
> > unsigned int suspend_vsel_reg;
> > + struct reg_field vsel_gpi;
> > /* Event detection bit */
> > struct reg_field oc_event;
> > };
> > @@ -65,6 +68,7 @@ struct da9062_regulator {
> > struct regmap_field *suspend;
> > struct regmap_field *sleep;
> > struct regmap_field *suspend_sleep;
> > + struct regmap_field *vsel_gpi;
> > };
> >
> > /* Encapsulates all information for the regulators driver */
> > @@ -351,6 +355,65 @@ static const struct regulator_ops da9062_ldo_ops = {
> > .set_suspend_mode = da9062_ldo_set_suspend_mode,
> > };
> >
> > +static int da9062_config_gpi(struct device_node *np,
> > + const struct regulator_desc *desc,
> > + struct regulator_config *cfg, const char *gpi_id)
> > +{
> > + struct da9062_regulator *regl = cfg->driver_data;
> > + struct gpio_desc *gpi;
> > + unsigned int nr;
> > + int ret;
> > + char *prop, *label;
> > +
> > + prop = kasprintf(GFP_KERNEL, "dlg,%s-sense-gpios", gpi_id);
> > + if (!prop)
> > + return -ENOMEM;
> > + label = kasprintf(GFP_KERNEL, "%s-%s-gpi", desc->name, gpi_id);
> > + if (!label) {
> > + ret = -ENOMEM;
> > + goto free;
>
> If we use the generic bindings names then the above will change I guess.

Yes.

> > + }
> > +
> > + /*
> > + * We only must ensure that the gpio device is probed before the
> > + * regulator driver so no need to store the reference global. Luckily
> > + * devm_* releases the gpio upon a unbound action.
> > + */
> > + gpi = devm_gpiod_get_from_of_node(cfg->dev, np, prop, 0, GPIOD_IN |
> > + GPIOD_FLAGS_BIT_NONEXCLUSIVE,
> > label);
> > + if (IS_ERR(gpi)) {
> > + ret = PTR_ERR(gpi);
> > + goto free;
> > + }
> > +
> > + if (!gpi) {
> > + ret = 0;
> > + goto free;
> > + }
> > +
> > + /* We need the local number */
> > + nr = da9062_gpio_get_hwgpio(gpi);
> > + if (nr < 1 || nr > 3) {
> > + ret = -EINVAL;
> > + goto free;
> > + }
> > +
> > + ret = regmap_field_write(regl->vsel_gpi, nr);
>
> Actually thinking about this some more, should we really be setting alternate
> functions of the GPIO here? Would this not be done through GPIO/Pinmux
> frameworks? That way the GPIO would be blocked off from other's requesting it.
> This seems a little unsafe, unless I'm mistaken.

The GPIO is used as input, see the flags I passed to
devm_gpiod_get_from_of_node(). What I did here is to tell the regulator
to listen to the gpio input instead of the sequencer. But as I said the
gpio is still configured as input which is absolutly correct. Please
check [1] chapter 7.7.1

[1] https://www.dialog-semiconductor.com/sites/default/files/da9062-a_datasheet_2v3.pdf

Regards,
Marco

> > +
> > +free:
> > + kfree(prop);
> > + kfree(label);
> > +
> > + return ret;
> > +}
> > +
> > +static int da9062_parse_dt(struct device_node *np,
> > + const struct regulator_desc *desc,
> > + struct regulator_config *cfg)
> > +{
> > + return da9062_config_gpi(np, desc, cfg, "vsel");
> > +}
> > +
> > /* DA9061 Regulator information */
> > static const struct da9062_regulator_info local_da9061_regulator_info[] = {
> > {
> > @@ -358,6 +421,7 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > .desc.name = "DA9061 BUCK1",
> > .desc.of_match = of_match_ptr("buck1"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_buck_ops,
> > .desc.min_uV = (300) * 1000,
> > .desc.uV_step = (10) * 1000,
> > @@ -388,12 +452,17 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_BUCK1_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_BUCK1_CONT,
> > + __builtin_ffs((int)DA9062AA_VBUCK1_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VBUCK1_GPI_MASK) - 1),
> > },
> > {
> > .desc.id = DA9061_ID_BUCK2,
> > .desc.name = "DA9061 BUCK2",
> > .desc.of_match = of_match_ptr("buck2"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_buck_ops,
> > .desc.min_uV = (800) * 1000,
> > .desc.uV_step = (20) * 1000,
> > @@ -424,12 +493,17 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_BUCK3_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_BUCK3_CONT,
> > + __builtin_ffs((int)DA9062AA_VBUCK3_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VBUCK3_GPI_MASK) - 1),
> > },
> > {
> > .desc.id = DA9061_ID_BUCK3,
> > .desc.name = "DA9061 BUCK3",
> > .desc.of_match = of_match_ptr("buck3"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_buck_ops,
> > .desc.min_uV = (530) * 1000,
> > .desc.uV_step = (10) * 1000,
> > @@ -460,12 +534,17 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_BUCK4_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_BUCK4_CONT,
> > + __builtin_ffs((int)DA9062AA_VBUCK4_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VBUCK4_GPI_MASK) - 1),
> > },
> > {
> > .desc.id = DA9061_ID_LDO1,
> > .desc.name = "DA9061 LDO1",
> > .desc.of_match = of_match_ptr("ldo1"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -489,6 +568,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO1_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO1_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO1_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO1_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -499,6 +582,7 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > .desc.name = "DA9061 LDO2",
> > .desc.of_match = of_match_ptr("ldo2"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -522,6 +606,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO2_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO2_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO2_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO2_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO2_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -532,6 +620,7 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > .desc.name = "DA9061 LDO3",
> > .desc.of_match = of_match_ptr("ldo3"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -555,6 +644,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO3_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO3_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO3_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO3_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -565,6 +658,7 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > .desc.name = "DA9061 LDO4",
> > .desc.of_match = of_match_ptr("ldo4"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -588,6 +682,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO4_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO4_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO4_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO4_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -602,6 +700,7 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > .desc.name = "DA9062 BUCK1",
> > .desc.of_match = of_match_ptr("buck1"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_buck_ops,
> > .desc.min_uV = (300) * 1000,
> > .desc.uV_step = (10) * 1000,
> > @@ -632,12 +731,17 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_BUCK1_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_BUCK1_CONT,
> > + __builtin_ffs((int)DA9062AA_VBUCK1_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VBUCK1_GPI_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_BUCK2,
> > .desc.name = "DA9062 BUCK2",
> > .desc.of_match = of_match_ptr("buck2"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_buck_ops,
> > .desc.min_uV = (300) * 1000,
> > .desc.uV_step = (10) * 1000,
> > @@ -668,12 +772,17 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK2_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_BUCK2_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_BUCK2_CONT,
> > + __builtin_ffs((int)DA9062AA_VBUCK2_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VBUCK2_GPI_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_BUCK3,
> > .desc.name = "DA9062 BUCK3",
> > .desc.of_match = of_match_ptr("buck3"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_buck_ops,
> > .desc.min_uV = (800) * 1000,
> > .desc.uV_step = (20) * 1000,
> > @@ -704,12 +813,17 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_BUCK3_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_BUCK3_CONT,
> > + __builtin_ffs((int)DA9062AA_VBUCK3_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VBUCK3_GPI_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_BUCK4,
> > .desc.name = "DA9062 BUCK4",
> > .desc.of_match = of_match_ptr("buck4"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_buck_ops,
> > .desc.min_uV = (530) * 1000,
> > .desc.uV_step = (10) * 1000,
> > @@ -740,12 +854,17 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_BUCK4_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_BUCK4_CONT,
> > + __builtin_ffs((int)DA9062AA_VBUCK4_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VBUCK4_GPI_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_LDO1,
> > .desc.name = "DA9062 LDO1",
> > .desc.of_match = of_match_ptr("ldo1"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -769,6 +888,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO1_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO1_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO1_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO1_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -779,6 +902,7 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > .desc.name = "DA9062 LDO2",
> > .desc.of_match = of_match_ptr("ldo2"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -802,6 +926,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO2_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO2_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO2_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO2_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO2_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -812,6 +940,7 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > .desc.name = "DA9062 LDO3",
> > .desc.of_match = of_match_ptr("ldo3"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -835,6 +964,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO3_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO3_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO3_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO3_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -845,6 +978,7 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > .desc.name = "DA9062 LDO4",
> > .desc.of_match = of_match_ptr("ldo4"),
> > .desc.regulators_node = of_match_ptr("regulators"),
> > + .desc.of_parse_cb = da9062_parse_dt,
> > .desc.ops = &da9062_ldo_ops,
> > .desc.min_uV = (900) * 1000,
> > .desc.uV_step = (50) * 1000,
> > @@ -868,6 +1002,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_LDO4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz(DA9062AA_LDO4_CONF_MASK) - 1),
> > + .vsel_gpi = REG_FIELD(DA9062AA_LDO4_CONT,
> > + __builtin_ffs((int)DA9062AA_VLDO4_GPI_MASK) - 1,
> > + sizeof(unsigned int) * 8 -
> > + __builtin_clz(DA9062AA_VLDO4_GPI_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -988,6 +1126,15 @@ static int da9062_regulator_probe(struct
> > platform_device *pdev)
> > return PTR_ERR(regl->suspend_sleep);
> > }
> >
> > + if (regl->info->vsel_gpi.reg) {
> > + regl->vsel_gpi = devm_regmap_field_alloc(
> > + &pdev->dev,
> > + chip->regmap,
> > + regl->info->vsel_gpi);
> > + if (IS_ERR(regl->vsel_gpi))
> > + return PTR_ERR(regl->vsel_gpi);
> > + }
> > +
> > /* Register regulator */
> > memset(&config, 0, sizeof(config));
> > config.dev = chip->dev;
> > @@ -997,6 +1144,8 @@ static int da9062_regulator_probe(struct
> > platform_device *pdev)
> > regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
> > &config);
> > if (IS_ERR(regl->rdev)) {
> > + if (PTR_ERR(regl->rdev) == -EPROBE_DEFER)
> > + return -EPROBE_DEFER;
> > dev_err(&pdev->dev,
> > "Failed to register %s regulator\n",
> > regl->desc.name);
> > --
> > 2.20.1
>
>

--
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