Refactor initialization to use U-Boot's driver model and API.
Acked-by: Sumit Garg sumit.garg@linaro.org Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- drivers/power/regulator/qcom-rpmh-regulator.c | 136 +++++++++++++++++++------- 1 file changed, 102 insertions(+), 34 deletions(-)
diff --git a/drivers/power/regulator/qcom-rpmh-regulator.c b/drivers/power/regulator/qcom-rpmh-regulator.c index b716b380c148..06fd3f31956f 100644 --- a/drivers/power/regulator/qcom-rpmh-regulator.c +++ b/drivers/power/regulator/qcom-rpmh-regulator.c @@ -411,66 +411,134 @@ static const struct rpmh_vreg_init_data pm8150l_vreg_data[] = { RPMH_VREG("ldo11", "ldo%s11", &pmic5_pldo, "vdd-l7-l11"), {} };
-static int rpmh_regulator_probe(struct platform_device *pdev) +/* probe an individual regulator */ +static int rpmh_regulator_probe(struct udevice *dev) { - struct device *dev = &pdev->dev; - const struct rpmh_vreg_init_data *vreg_data; - struct device_node *node; - struct rpmh_vreg *vreg; - const char *pmic_id; - int ret; + const struct rpmh_vreg_init_data *init_data; + struct rpmh_vreg *priv; + struct dm_regulator_uclass_plat *plat_data;
- vreg_data = of_device_get_match_data(dev); - if (!vreg_data) + init_data = (const struct rpmh_vreg_init_data *)dev_get_driver_data(dev); + priv = dev_get_priv(dev); + plat_data = dev_get_uclass_plat(dev); + + priv->dev = dev; + priv->addr = cmd_db_read_addr(dev->name); + if (!priv->addr) { + dev_err(dev, "Failed to read RPMh address for %s\n", dev->name); return -ENODEV; - - ret = of_property_read_string(dev->of_node, "qcom,pmic-id", &pmic_id); - if (ret < 0) { - dev_err(dev, "qcom,pmic-id missing in DT node\n"); - return ret; }
- for_each_available_child_of_node(dev->of_node, node) { - vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL); - if (!vreg) { - of_node_put(node); + priv->hw_data = init_data->hw_data; + priv->enabled = -EINVAL; + priv->uv = -ENOTRECOVERABLE; + if (ofnode_read_u32(dev_ofnode(dev), "regulator-initial-mode", &priv->mode)) + priv->mode = -EINVAL; + + plat_data->mode = priv->hw_data->pmic_mode_map; + plat_data->mode_count = priv->hw_data->n_modes; + + return 0; +} + +/* for non-drm, xob, or bypass regulators add additional driver definitions */ +U_BOOT_DRIVER(rpmh_regulator_drm) = { + .name = "rpmh_regulator_drm", + .id = UCLASS_REGULATOR, + .probe = rpmh_regulator_probe, + .priv_auto = sizeof(struct rpmh_vreg), + .ops = &rpmh_regulator_vrm_drms_ops, +}; + +/* This driver intentionally only supports a subset of the available regulators. + * This function checks to see if a given regulator node in DT matches a regulator + * defined in the driver. + */ +static const struct rpmh_vreg_init_data * +vreg_get_init_data(const struct rpmh_vreg_init_data *init_data, ofnode node) +{ + const struct rpmh_vreg_init_data *data; + + for (data = init_data; data->name; data++) { + if (!strcmp(data->name, ofnode_get_name(node))) + return data; + } + + return NULL; +} + +static int rpmh_regulators_bind(struct udevice *dev) +{ + const struct rpmh_vreg_init_data *init_data, *data; + const char *pmic_id; + char *name; + struct driver *drv; + ofnode node; + int ret; + size_t namelen; + + init_data = (const struct rpmh_vreg_init_data *)dev_get_driver_data(dev); + if (!init_data) { + dev_err(dev, "No RPMh regulator init data\n"); + return -ENODEV; + } + + pmic_id = ofnode_read_string(dev_ofnode(dev), "qcom,pmic-id"); + if (!pmic_id) { + dev_err(dev, "No PMIC ID\n"); + return -ENODEV; + } + + drv = lists_driver_lookup_name("rpmh_regulator_drm"); + + ofnode_for_each_subnode(node, dev_ofnode(dev)) { + data = vreg_get_init_data(init_data, node); + if (!data) + continue; + + /* %s is replaced with pmic_id, so subtract 2, then add 1 for the null terminator */ + namelen = strlen(data->resource_name) + strlen(pmic_id) - 1; + name = devm_kzalloc(dev, namelen, GFP_KERNEL); + ret = snprintf(name, namelen, data->resource_name, pmic_id); + if (ret < 0 || ret >= namelen) { + dev_err(dev, "Failed to create RPMh regulator name\n"); return -ENOMEM; }
- ret = rpmh_regulator_init_vreg(vreg, dev, node, pmic_id, - vreg_data); + ret = device_bind_with_driver_data(dev, drv, name, (ulong)data, + node, NULL); if (ret < 0) { - of_node_put(node); + dev_err(dev, "Failed to bind RPMh regulator %s: %d\n", name, ret); return ret; } }
return 0; }
-static const struct of_device_id __maybe_unused rpmh_regulator_match_table[] = { +static const struct udevice_id rpmh_regulator_ids[] = { { .compatible = "qcom,pm8150-rpmh-regulators", - .data = pm8150_vreg_data, + .data = (ulong)pm8150_vreg_data, }, { .compatible = "qcom,pm8150l-rpmh-regulators", - .data = pm8150l_vreg_data, + .data = (ulong)pm8150l_vreg_data, }, - {} + { /* sentinal */ }, }; -MODULE_DEVICE_TABLE(of, rpmh_regulator_match_table);
-static struct platform_driver rpmh_regulator_driver = { - .driver = { - .name = "qcom-rpmh-regulator", - .probe_type = PROBE_PREFER_ASYNCHRONOUS, - .of_match_table = of_match_ptr(rpmh_regulator_match_table), - }, - .probe = rpmh_regulator_probe, +/* Driver for a 'bank' of regulators. This creates devices for each + * individual regulator + */ +U_BOOT_DRIVER(rpmh_regulators) = { + .name = "rpmh_regulators", + .id = UCLASS_MISC, + .bind = rpmh_regulators_bind, + .of_match = rpmh_regulator_ids, + .ops = &rpmh_regulator_vrm_drms_ops, }; -module_platform_driver(rpmh_regulator_driver);
MODULE_DESCRIPTION("Qualcomm RPMh regulator driver"); MODULE_LICENSE("GPL v2");