驱动里面如何操作regulator

设备树配置

qca,bt-vdd-rfa1-supply = <&pm8150_s5>;
qca,bt-vdd-rfa2-supply = <&pm8150a_s8>;
qca,bt-vdd-asd-supply = <&pm8150_l16>;

qca,bt-vdd-aon-voltage-level = <950000 950000>;
qca,bt-vdd-dig-voltage-level = <950000 952000>;
qca,bt-vdd-rfa1-voltage-level = <1900000 1900000>;
qca,bt-vdd-rfa2-voltage-level = <1350000 1350000>;
qca,bt-vdd-asd-voltage-level = <3024000 3304000>;

内核自带的bt驱动电源部分如下

static int bt_dt_parse_vreg_info(struct device *dev,struct bt_power_vreg_data **vreg_data, const char *vreg_name)
{int len, ret = 0;const __be32 *prop;char prop_name[MAX_PROP_SIZE];struct bt_power_vreg_data *vreg;struct device_node *np = dev->of_node;BT_PWR_DBG("vreg dev tree parse for %s", vreg_name);*vreg_data = NULL;snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", vreg_name);if (of_parse_phandle(np, prop_name, 0)) {vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);if (!vreg) {BT_PWR_ERR("No memory for vreg: %s", vreg_name);ret = -ENOMEM;goto err;}vreg->name = vreg_name;/* Parse voltage-level from each node */snprintf(prop_name, MAX_PROP_SIZE,"%s-voltage-level", vreg_name);prop = of_get_property(np, prop_name, &len);if (!prop || (len != (2 * sizeof(__be32)))) {dev_warn(dev, "%s %s property\n",prop ? "invalid format" : "no", prop_name);} else {vreg->low_vol_level = be32_to_cpup(&prop[0]);vreg->high_vol_level = be32_to_cpup(&prop[1]);}/* Parse current-level from each node */snprintf(prop_name, MAX_PROP_SIZE,"%s-current-level", vreg_name);ret = of_property_read_u32(np, prop_name, &vreg->load_uA);if (ret < 0) {BT_PWR_DBG("%s property is not valid\n", prop_name);vreg->load_uA = -1;ret = 0;}*vreg_data = vreg;BT_PWR_DBG("%s: vol=[%d %d]uV, current=[%d]uA\n",vreg->name, vreg->low_vol_level,vreg->high_vol_level,vreg->load_uA);} elseBT_PWR_INFO("%s: is not provided in device tree", vreg_name);err:return ret;
}static int bt_vreg_init(struct bt_power_vreg_data *vreg)
{int rc = 0;struct device *dev = &btpdev->dev;BT_PWR_DBG("vreg_get for : %s", vreg->name);/* Get the regulator handle */vreg->reg = regulator_get(dev, vreg->name);if (IS_ERR(vreg->reg)) {rc = PTR_ERR(vreg->reg);vreg->reg = NULL;pr_err("%s: regulator_get(%s) failed. rc=%d\n",__func__, vreg->name, rc);goto out;}if ((regulator_count_voltages(vreg->reg) > 0)&& (vreg->low_vol_level) && (vreg->high_vol_level))vreg->set_voltage_sup = 1;out:return rc;
}static int bt_vreg_enable(struct bt_power_vreg_data *vreg)
{int rc = 0;if (!vreg->is_enabled) {if (vreg->set_voltage_sup) {rc = regulator_set_voltage(vreg->reg,vreg->low_vol_level,vreg->high_vol_level);if (rc < 0) {BT_PWR_ERR("vreg_set_vol(%s) failed rc=%d\n",vreg->name, rc);goto out;}}if (vreg->load_uA >= 0) {rc = regulator_set_load(vreg->reg,vreg->load_uA);if (rc < 0) {BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n",vreg->name, rc);goto out;}}rc = regulator_enable(vreg->reg);if (rc < 0) {BT_PWR_ERR("regulator_enable(%s) failed. rc=%d\n",vreg->name, rc);goto out;}vreg->is_enabled = true;}BT_PWR_ERR("vreg_en successful for : %s", vreg->name);
out:return rc;
}static int bt_vreg_disable(struct bt_power_vreg_data *vreg)
{int rc = 0;if (!vreg)return rc;if (vreg->is_enabled) {rc = regulator_disable(vreg->reg);if (rc < 0) {BT_PWR_ERR("regulator_disable(%s) failed. rc=%d\n",vreg->name, rc);goto out;}vreg->is_enabled = false;if (vreg->set_voltage_sup) {/* Set the min voltage to 0 */rc = regulator_set_voltage(vreg->reg, 0,vreg->high_vol_level);if (rc < 0) {BT_PWR_ERR("vreg_set_vol(%s) failed rc=%d\n",vreg->name, rc);goto out;}}if (vreg->load_uA >= 0) {rc = regulator_set_load(vreg->reg, 0);if (rc < 0) {BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n",vreg->name, rc);goto out;}}}BT_PWR_ERR("vreg_disable successful for : %s", vreg->name);
out:return rc;
}

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