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regulator: da9063: implement setter for voltage monitoring

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Allow to en- and disable voltage monitoring from the device tree.
Consider that the da9063 only monitors under- *and* over-voltage
together, so both must be set to the same severity and value.

Reviewed-by: Adam Ward <DLG-Adam.Ward.opensource@dm.renesas.com>
Signed-off-by: Benjamin Bara <benjamin.bara@skidata.com>
Link: https://lore.kernel.org/r/20230403-da9063-disable-unused-v3-2-cc4dc698864c@skidata.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Benjamin Bara 2023-04-05 19:14:35 +02:00 • committed by Mark Brown
parent 13186dae18
commit b8717a80e6
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 90 additions and 28 deletions
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118
drivers/regulator/da9063-regulator.c
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@ -207,6 +207,24 @@ static const unsigned int da9063_bmem_bio_merged_limits[] = {
4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
};
static int da9063_set_xvp(struct regulator_dev *rdev, int lim_uV, int severity, bool enable)
{
struct da9063_regulator *regl = rdev_get_drvdata(rdev);
struct device *dev = regl->hw->dev;
dev_dbg(dev, "%s: lim: %d, sev: %d, en: %d\n", regl->desc.name, lim_uV, severity, enable);
/*
* only support enable and disable.
* the da9063 offers a GPIO (GP_FB2) which is unasserted if an XV happens.
* therefore ignore severity here, as there might be handlers in hardware.
*/
if (lim_uV)
return -EINVAL;
return regmap_field_write(regl->vmon, enable ? 1 : 0);
}
static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct da9063_regulator *regl = rdev_get_drvdata(rdev);
@ -545,37 +563,41 @@ static int da9063_buck_get_current_limit(struct regulator_dev *rdev)
}
static const struct regulator_ops da9063_buck_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_current_limit = da9063_buck_set_current_limit,
.get_current_limit = da9063_buck_get_current_limit,
.set_mode = da9063_buck_set_mode,
.get_mode = da9063_buck_get_mode,
.get_status = da9063_buck_get_status,
.set_suspend_voltage = da9063_set_suspend_voltage,
.set_suspend_enable = da9063_suspend_enable,
.set_suspend_disable = da9063_suspend_disable,
.set_suspend_mode = da9063_buck_set_suspend_mode,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_current_limit = da9063_buck_set_current_limit,
.get_current_limit = da9063_buck_get_current_limit,
.set_mode = da9063_buck_set_mode,
.get_mode = da9063_buck_get_mode,
.get_status = da9063_buck_get_status,
.set_suspend_voltage = da9063_set_suspend_voltage,
.set_suspend_enable = da9063_suspend_enable,
.set_suspend_disable = da9063_suspend_disable,
.set_suspend_mode = da9063_buck_set_suspend_mode,
.set_over_voltage_protection = da9063_set_xvp,
.set_under_voltage_protection = da9063_set_xvp,
};
static const struct regulator_ops da9063_ldo_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_mode = da9063_ldo_set_mode,
.get_mode = da9063_ldo_get_mode,
.get_status = da9063_ldo_get_status,
.set_suspend_voltage = da9063_set_suspend_voltage,
.set_suspend_enable = da9063_suspend_enable,
.set_suspend_disable = da9063_suspend_disable,
.set_suspend_mode = da9063_ldo_set_suspend_mode,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_mode = da9063_ldo_set_mode,
.get_mode = da9063_ldo_get_mode,
.get_status = da9063_ldo_get_status,
.set_suspend_voltage = da9063_set_suspend_voltage,
.set_suspend_enable = da9063_suspend_enable,
.set_suspend_disable = da9063_suspend_disable,
.set_suspend_mode = da9063_ldo_set_suspend_mode,
.set_over_voltage_protection = da9063_set_xvp,
.set_under_voltage_protection = da9063_set_xvp,
};
/* Info of regulators for DA9063 */
@ -749,6 +771,41 @@ static const struct regulator_init_data *da9063_get_regulator_initdata(
return NULL;
}
static int da9063_check_xvp_constraints(struct regulator_config *config)
{
struct da9063_regulator *regl = config->driver_data;
const struct regulation_constraints *constr = &config->init_data->constraints;
const struct notification_limit *uv_l = &constr->under_voltage_limits;
const struct notification_limit *ov_l = &constr->over_voltage_limits;
/* make sure that only one severity is used to clarify if unchanged, enabled or disabled */
if ((!!uv_l->prot + !!uv_l->err + !!uv_l->warn) > 1) {
dev_err(config->dev, "%s: at most one voltage monitoring severity allowed!\n",
regl->desc.name);
return -EINVAL;
}
/* make sure that UV and OV monitoring is set to the same severity and value */
if (uv_l->prot != ov_l->prot) {
dev_err(config->dev,
"%s: protection-microvolt: value must be equal for uv and ov!\n",
regl->desc.name);
return -EINVAL;
}
if (uv_l->err != ov_l->err) {
dev_err(config->dev, "%s: error-microvolt: value must be equal for uv and ov!\n",
regl->desc.name);
return -EINVAL;
}
if (uv_l->warn != ov_l->warn) {
dev_err(config->dev, "%s: warn-microvolt: value must be equal for uv and ov!\n",
regl->desc.name);
return -EINVAL;
}
return 0;
}
static struct of_regulator_match da9063_matches[] = {
[DA9063_ID_BCORE1] = { .name = "bcore1" },
[DA9063_ID_BCORE2] = { .name = "bcore2" },
@ -970,6 +1027,11 @@ static int da9063_regulator_probe(struct platform_device *pdev)
if (da9063_reg_matches)
config.of_node = da9063_reg_matches[id].of_node;
config.regmap = da9063->regmap;
ret = da9063_check_xvp_constraints(&config);
if (ret)
return ret;
regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
&config);
if (IS_ERR(regl->rdev)) {