Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
JiSheng Zhang | 1008 | 100.00% | 6 | 100.00% |
Total | 1008 | 6 |
// SPDX-License-Identifier: GPL-2.0 // // SY8824C/SY8824E regulator driver // // Copyright (C) 2019 Synaptics Incorporated // // Author: Jisheng Zhang <jszhang@kernel.org> #include <linux/module.h> #include <linux/i2c.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/regulator/driver.h> #include <linux/regulator/of_regulator.h> #define SY8824C_BUCK_EN (1 << 7) #define SY8824C_MODE (1 << 6) struct sy8824_config { /* registers */ unsigned int vol_reg; unsigned int mode_reg; unsigned int enable_reg; /* Voltage range and step(linear) */ unsigned int vsel_min; unsigned int vsel_step; unsigned int vsel_count; }; struct sy8824_device_info { struct device *dev; struct regulator_desc desc; struct regulator_init_data *regulator; const struct sy8824_config *cfg; }; static int sy8824_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct sy8824_device_info *di = rdev_get_drvdata(rdev); const struct sy8824_config *cfg = di->cfg; switch (mode) { case REGULATOR_MODE_FAST: regmap_update_bits(rdev->regmap, cfg->mode_reg, SY8824C_MODE, SY8824C_MODE); break; case REGULATOR_MODE_NORMAL: regmap_update_bits(rdev->regmap, cfg->mode_reg, SY8824C_MODE, 0); break; default: return -EINVAL; } return 0; } static unsigned int sy8824_get_mode(struct regulator_dev *rdev) { struct sy8824_device_info *di = rdev_get_drvdata(rdev); const struct sy8824_config *cfg = di->cfg; u32 val; int ret = 0; ret = regmap_read(rdev->regmap, cfg->mode_reg, &val); if (ret < 0) return ret; if (val & SY8824C_MODE) return REGULATOR_MODE_FAST; else return REGULATOR_MODE_NORMAL; } static const struct regulator_ops sy8824_regulator_ops = { .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .map_voltage = regulator_map_voltage_linear, .list_voltage = regulator_list_voltage_linear, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .set_mode = sy8824_set_mode, .get_mode = sy8824_get_mode, }; static int sy8824_regulator_register(struct sy8824_device_info *di, struct regulator_config *config) { struct regulator_desc *rdesc = &di->desc; const struct sy8824_config *cfg = di->cfg; struct regulator_dev *rdev; rdesc->name = "sy8824-reg"; rdesc->supply_name = "vin"; rdesc->ops = &sy8824_regulator_ops; rdesc->type = REGULATOR_VOLTAGE; rdesc->n_voltages = cfg->vsel_count; rdesc->enable_reg = cfg->enable_reg; rdesc->enable_mask = SY8824C_BUCK_EN; rdesc->min_uV = cfg->vsel_min; rdesc->uV_step = cfg->vsel_step; rdesc->vsel_reg = cfg->vol_reg; rdesc->vsel_mask = cfg->vsel_count - 1; rdesc->owner = THIS_MODULE; rdev = devm_regulator_register(di->dev, &di->desc, config); return PTR_ERR_OR_ZERO(rdev); } static const struct regmap_config sy8824_regmap_config = { .reg_bits = 8, .val_bits = 8, }; static int sy8824_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct device_node *np = dev->of_node; struct sy8824_device_info *di; struct regulator_config config = { }; struct regmap *regmap; int ret; di = devm_kzalloc(dev, sizeof(struct sy8824_device_info), GFP_KERNEL); if (!di) return -ENOMEM; di->regulator = of_get_regulator_init_data(dev, np, &di->desc); if (!di->regulator) { dev_err(dev, "Platform data not found!\n"); return -EINVAL; } di->dev = dev; di->cfg = of_device_get_match_data(dev); regmap = devm_regmap_init_i2c(client, &sy8824_regmap_config); if (IS_ERR(regmap)) { dev_err(dev, "Failed to allocate regmap!\n"); return PTR_ERR(regmap); } i2c_set_clientdata(client, di); config.dev = di->dev; config.init_data = di->regulator; config.regmap = regmap; config.driver_data = di; config.of_node = np; ret = sy8824_regulator_register(di, &config); if (ret < 0) dev_err(dev, "Failed to register regulator!\n"); return ret; } static const struct sy8824_config sy8824c_cfg = { .vol_reg = 0x00, .mode_reg = 0x00, .enable_reg = 0x00, .vsel_min = 762500, .vsel_step = 12500, .vsel_count = 64, }; static const struct sy8824_config sy8824e_cfg = { .vol_reg = 0x00, .mode_reg = 0x00, .enable_reg = 0x00, .vsel_min = 700000, .vsel_step = 12500, .vsel_count = 64, }; static const struct sy8824_config sy20276_cfg = { .vol_reg = 0x00, .mode_reg = 0x01, .enable_reg = 0x01, .vsel_min = 600000, .vsel_step = 10000, .vsel_count = 128, }; static const struct sy8824_config sy20278_cfg = { .vol_reg = 0x00, .mode_reg = 0x01, .enable_reg = 0x01, .vsel_min = 762500, .vsel_step = 12500, .vsel_count = 64, }; static const struct of_device_id sy8824_dt_ids[] = { { .compatible = "silergy,sy8824c", .data = &sy8824c_cfg }, { .compatible = "silergy,sy8824e", .data = &sy8824e_cfg }, { .compatible = "silergy,sy20276", .data = &sy20276_cfg }, { .compatible = "silergy,sy20278", .data = &sy20278_cfg }, { } }; MODULE_DEVICE_TABLE(of, sy8824_dt_ids); static const struct i2c_device_id sy8824_id[] = { { "sy8824", }, { }, }; MODULE_DEVICE_TABLE(i2c, sy8824_id); static struct i2c_driver sy8824_regulator_driver = { .driver = { .name = "sy8824-regulator", .of_match_table = of_match_ptr(sy8824_dt_ids), }, .probe = sy8824_i2c_probe, .id_table = sy8824_id, }; module_i2c_driver(sy8824_regulator_driver); MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>"); MODULE_DESCRIPTION("SY8824C/SY8824E regulator driver"); MODULE_LICENSE("GPL v2");
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