| // SPDX-License-Identifier: GPL-2.0+ |
| |
| #include <dt-bindings/regulator/richtek,rt5190a-regulator.h> |
| #include <linux/bits.h> |
| #include <linux/i2c.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/property.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/regulator/of_regulator.h> |
| |
| #define RT5190A_REG_MANUFACTURE 0x00 |
| #define RT5190A_REG_BUCK2VSEL 0x04 |
| #define RT5190A_REG_BUCK3VSEL 0x05 |
| #define RT5190A_REG_DCDCCNTL 0x06 |
| #define RT5190A_REG_ENABLE 0x07 |
| #define RT5190A_REG_DISCHARGE 0x09 |
| #define RT5190A_REG_PROTMODE 0x0A |
| #define RT5190A_REG_MUTECNTL 0x0B |
| #define RT5190A_REG_PGSTAT 0x0F |
| #define RT5190A_REG_OVINT 0x10 |
| #define RT5190A_REG_HOTDIEMASK 0x17 |
| |
| #define RT5190A_VSEL_MASK GENMASK(6, 0) |
| #define RT5190A_RID_BITMASK(rid) BIT(rid + 1) |
| #define RT5190A_BUCK1_DISCHG_MASK GENMASK(1, 0) |
| #define RT5190A_BUCK1_DISCHG_ONVAL 0x01 |
| #define RT5190A_OVERVOLT_MASK GENMASK(7, 0) |
| #define RT5190A_UNDERVOLT_MASK GENMASK(15, 8) |
| #define RT5190A_CH234OT_MASK BIT(29) |
| #define RT5190A_CHIPOT_MASK BIT(28) |
| |
| #define RT5190A_BUCK23_MINUV 600000 |
| #define RT5190A_BUCK23_MAXUV 1400000 |
| #define RT5190A_BUCK23_STEPUV 10000 |
| #define RT5190A_BUCK23_STEPNUM ((1400000 - 600000) / 10000 + 1) |
| |
| enum { |
| RT5190A_IDX_BUCK1 = 0, |
| RT5190A_IDX_BUCK2, |
| RT5190A_IDX_BUCK3, |
| RT5190A_IDX_BUCK4, |
| RT5190A_IDX_LDO, |
| RT5190A_MAX_IDX |
| }; |
| |
| struct rt5190a_priv { |
| struct device *dev; |
| struct regmap *regmap; |
| struct regulator_desc rdesc[RT5190A_MAX_IDX]; |
| struct regulator_dev *rdev[RT5190A_MAX_IDX]; |
| }; |
| |
| static int rt5190a_get_error_flags(struct regulator_dev *rdev, |
| unsigned int *flags) |
| { |
| struct regmap *regmap = rdev_get_regmap(rdev); |
| int rid = rdev_get_id(rdev); |
| unsigned int pgood_stat; |
| int ret; |
| |
| ret = regmap_read(regmap, RT5190A_REG_PGSTAT, &pgood_stat); |
| if (ret) |
| return ret; |
| |
| if (!(pgood_stat & RT5190A_RID_BITMASK(rid))) |
| *flags = REGULATOR_ERROR_FAIL; |
| else |
| *flags = 0; |
| |
| return 0; |
| } |
| |
| static int rt5190a_fixed_buck_set_mode(struct regulator_dev *rdev, |
| unsigned int mode) |
| { |
| struct regmap *regmap = rdev_get_regmap(rdev); |
| int rid = rdev_get_id(rdev); |
| unsigned int mask = RT5190A_RID_BITMASK(rid), val; |
| |
| switch (mode) { |
| case REGULATOR_MODE_FAST: |
| val = mask; |
| break; |
| case REGULATOR_MODE_NORMAL: |
| val = 0; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return regmap_update_bits(regmap, RT5190A_REG_DCDCCNTL, mask, val); |
| } |
| |
| static unsigned int rt5190a_fixed_buck_get_mode(struct regulator_dev *rdev) |
| { |
| struct regmap *regmap = rdev_get_regmap(rdev); |
| int rid = rdev_get_id(rdev); |
| unsigned int val; |
| int ret; |
| |
| ret = regmap_read(regmap, RT5190A_REG_DCDCCNTL, &val); |
| if (ret) { |
| dev_err(&rdev->dev, "Failed to get mode [%d]\n", ret); |
| return ret; |
| } |
| |
| if (val & RT5190A_RID_BITMASK(rid)) |
| return REGULATOR_MODE_FAST; |
| |
| return REGULATOR_MODE_NORMAL; |
| } |
| |
| static const struct regulator_ops rt5190a_ranged_buck_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .list_voltage = regulator_list_voltage_linear, |
| .set_active_discharge = regulator_set_active_discharge_regmap, |
| .get_error_flags = rt5190a_get_error_flags, |
| }; |
| |
| static const struct regulator_ops rt5190a_fixed_buck_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_active_discharge = regulator_set_active_discharge_regmap, |
| .set_mode = rt5190a_fixed_buck_set_mode, |
| .get_mode = rt5190a_fixed_buck_get_mode, |
| .get_error_flags = rt5190a_get_error_flags, |
| }; |
| |
| static const struct regulator_ops rt5190a_fixed_ldo_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_active_discharge = regulator_set_active_discharge_regmap, |
| .get_error_flags = rt5190a_get_error_flags, |
| }; |
| |
| static irqreturn_t rt5190a_irq_handler(int irq, void *data) |
| { |
| struct rt5190a_priv *priv = data; |
| __le32 raws; |
| unsigned int events, fields; |
| static const struct { |
| unsigned int bitmask; |
| unsigned int report; |
| } event_tbl[] = { |
| { RT5190A_OVERVOLT_MASK, REGULATOR_ERROR_REGULATION_OUT }, |
| { RT5190A_UNDERVOLT_MASK, REGULATOR_ERROR_UNDER_VOLTAGE } |
| }; |
| int i, j, ret; |
| |
| ret = regmap_raw_read(priv->regmap, RT5190A_REG_OVINT, &raws, |
| sizeof(raws)); |
| if (ret) { |
| dev_err(priv->dev, "Failed to read events\n"); |
| return IRQ_NONE; |
| } |
| |
| events = le32_to_cpu(raws); |
| |
| ret = regmap_raw_write(priv->regmap, RT5190A_REG_OVINT, &raws, |
| sizeof(raws)); |
| if (ret) |
| dev_err(priv->dev, "Failed to write-clear events\n"); |
| |
| /* Handle OV,UV events */ |
| for (i = 0; i < ARRAY_SIZE(event_tbl); i++) { |
| fields = events & event_tbl[i].bitmask; |
| fields >>= ffs(event_tbl[i].bitmask) - 1; |
| |
| for (j = 0; j < RT5190A_MAX_IDX; j++) { |
| if (!(fields & RT5190A_RID_BITMASK(j))) |
| continue; |
| |
| regulator_notifier_call_chain(priv->rdev[j], |
| event_tbl[i].report, |
| NULL); |
| } |
| } |
| |
| /* Handle CH234 OT event */ |
| if (events & RT5190A_CH234OT_MASK) { |
| for (j = RT5190A_IDX_BUCK2; j < RT5190A_IDX_LDO; j++) { |
| regulator_notifier_call_chain(priv->rdev[j], |
| REGULATOR_ERROR_OVER_TEMP, |
| NULL); |
| } |
| } |
| |
| /* Warning if CHIP OT occur */ |
| if (events & RT5190A_CHIPOT_MASK) |
| dev_warn(priv->dev, "CHIP overheat\n"); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static unsigned int rt5190a_of_map_mode(unsigned int mode) |
| { |
| switch (mode) { |
| case RT5190A_OPMODE_AUTO: |
| return REGULATOR_MODE_NORMAL; |
| case RT5190A_OPMODE_FPWM: |
| return REGULATOR_MODE_FAST; |
| default: |
| return REGULATOR_MODE_INVALID; |
| } |
| } |
| |
| static int rt5190a_of_parse_cb(struct rt5190a_priv *priv, int rid, |
| struct of_regulator_match *match) |
| { |
| struct regulator_desc *desc = priv->rdesc + rid; |
| struct regulator_init_data *init_data = match->init_data; |
| struct device_node *np = match->of_node; |
| bool latchup_enable; |
| unsigned int mask = RT5190A_RID_BITMASK(rid), val; |
| |
| if (!init_data) |
| return 0; |
| |
| switch (rid) { |
| case RT5190A_IDX_BUCK1: |
| case RT5190A_IDX_BUCK4: |
| case RT5190A_IDX_LDO: |
| init_data->constraints.apply_uV = 0; |
| |
| if (init_data->constraints.min_uV == |
| init_data->constraints.max_uV) |
| desc->fixed_uV = init_data->constraints.min_uV; |
| else { |
| dev_err(priv->dev, |
| "Variable voltage for fixed regulator\n"); |
| return -EINVAL; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| latchup_enable = of_property_read_bool(np, "richtek,latchup-enable"); |
| |
| /* latchup: 0, default hiccup: 1 */ |
| val = !latchup_enable ? mask : 0; |
| |
| return regmap_update_bits(priv->regmap, RT5190A_REG_PROTMODE, mask, val); |
| } |
| |
| static void rt5190a_fillin_regulator_desc(struct regulator_desc *desc, int rid) |
| { |
| static const char * const regu_name[] = { "buck1", "buck2", |
| "buck3", "buck4", |
| "ldo" }; |
| static const char * const supply[] = { NULL, "vin2", "vin3", "vin4", |
| "vinldo" }; |
| |
| desc->name = regu_name[rid]; |
| desc->supply_name = supply[rid]; |
| desc->owner = THIS_MODULE; |
| desc->type = REGULATOR_VOLTAGE; |
| desc->id = rid; |
| desc->enable_reg = RT5190A_REG_ENABLE; |
| desc->enable_mask = RT5190A_RID_BITMASK(rid); |
| desc->active_discharge_reg = RT5190A_REG_DISCHARGE; |
| desc->active_discharge_mask = RT5190A_RID_BITMASK(rid); |
| desc->active_discharge_on = RT5190A_RID_BITMASK(rid); |
| |
| switch (rid) { |
| case RT5190A_IDX_BUCK1: |
| desc->active_discharge_mask = RT5190A_BUCK1_DISCHG_MASK; |
| desc->active_discharge_on = RT5190A_BUCK1_DISCHG_ONVAL; |
| desc->n_voltages = 1; |
| desc->ops = &rt5190a_fixed_buck_ops; |
| desc->of_map_mode = rt5190a_of_map_mode; |
| break; |
| case RT5190A_IDX_BUCK2: |
| desc->vsel_reg = RT5190A_REG_BUCK2VSEL; |
| desc->vsel_mask = RT5190A_VSEL_MASK; |
| desc->min_uV = RT5190A_BUCK23_MINUV; |
| desc->uV_step = RT5190A_BUCK23_STEPUV; |
| desc->n_voltages = RT5190A_BUCK23_STEPNUM; |
| desc->ops = &rt5190a_ranged_buck_ops; |
| break; |
| case RT5190A_IDX_BUCK3: |
| desc->vsel_reg = RT5190A_REG_BUCK3VSEL; |
| desc->vsel_mask = RT5190A_VSEL_MASK; |
| desc->min_uV = RT5190A_BUCK23_MINUV; |
| desc->uV_step = RT5190A_BUCK23_STEPUV; |
| desc->n_voltages = RT5190A_BUCK23_STEPNUM; |
| desc->ops = &rt5190a_ranged_buck_ops; |
| break; |
| case RT5190A_IDX_BUCK4: |
| desc->n_voltages = 1; |
| desc->ops = &rt5190a_fixed_buck_ops; |
| desc->of_map_mode = rt5190a_of_map_mode; |
| break; |
| case RT5190A_IDX_LDO: |
| desc->n_voltages = 1; |
| desc->ops = &rt5190a_fixed_ldo_ops; |
| break; |
| } |
| } |
| |
| static struct of_regulator_match rt5190a_regulator_match[] = { |
| { .name = "buck1", }, |
| { .name = "buck2", }, |
| { .name = "buck3", }, |
| { .name = "buck4", }, |
| { .name = "ldo", } |
| }; |
| |
| static int rt5190a_parse_regulator_dt_data(struct rt5190a_priv *priv) |
| { |
| struct device_node *regulator_np; |
| struct regulator_desc *reg_desc; |
| struct of_regulator_match *match; |
| int i, ret; |
| |
| for (i = 0; i < RT5190A_MAX_IDX; i++) { |
| reg_desc = priv->rdesc + i; |
| match = rt5190a_regulator_match + i; |
| |
| rt5190a_fillin_regulator_desc(reg_desc, i); |
| |
| match->desc = reg_desc; |
| } |
| |
| regulator_np = of_get_child_by_name(priv->dev->of_node, "regulators"); |
| if (!regulator_np) { |
| dev_err(priv->dev, "Could not find 'regulators' node\n"); |
| return -ENODEV; |
| } |
| |
| ret = of_regulator_match(priv->dev, regulator_np, |
| rt5190a_regulator_match, |
| ARRAY_SIZE(rt5190a_regulator_match)); |
| |
| of_node_put(regulator_np); |
| |
| if (ret < 0) { |
| dev_err(priv->dev, |
| "Error parsing regulator init data: %d\n", ret); |
| return ret; |
| } |
| |
| for (i = 0; i < RT5190A_MAX_IDX; i++) { |
| match = rt5190a_regulator_match + i; |
| |
| ret = rt5190a_of_parse_cb(priv, i, match); |
| if (ret) { |
| dev_err(priv->dev, "Failed in [%d] of_parse_cb\n", i); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct reg_sequence rt5190a_init_patch[] = { |
| { 0x09, 0x3d, }, |
| { 0x0a, 0x3e, }, |
| { 0x0b, 0x01, }, |
| { 0x10, 0xff, }, |
| { 0x11, 0xff, }, |
| { 0x12, 0xff, }, |
| { 0x13, 0xff, }, |
| { 0x14, 0, }, |
| { 0x15, 0, }, |
| { 0x16, 0x3e, }, |
| { 0x17, 0, } |
| }; |
| |
| static int rt5190a_device_initialize(struct rt5190a_priv *priv) |
| { |
| bool mute_enable; |
| int ret; |
| |
| ret = regmap_register_patch(priv->regmap, rt5190a_init_patch, |
| ARRAY_SIZE(rt5190a_init_patch)); |
| if (ret) { |
| dev_err(priv->dev, "Failed to do register patch\n"); |
| return ret; |
| } |
| |
| mute_enable = device_property_read_bool(priv->dev, |
| "richtek,mute-enable"); |
| |
| if (mute_enable) { |
| ret = regmap_write(priv->regmap, RT5190A_REG_MUTECNTL, 0x00); |
| if (ret) { |
| dev_err(priv->dev, "Failed to enable mute function\n"); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int rt5190a_device_check(struct rt5190a_priv *priv) |
| { |
| u16 devid; |
| int ret; |
| |
| ret = regmap_raw_read(priv->regmap, RT5190A_REG_MANUFACTURE, &devid, |
| sizeof(devid)); |
| if (ret) |
| return ret; |
| |
| if (devid) { |
| dev_err(priv->dev, "Incorrect device id 0x%04x\n", devid); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| static const struct regmap_config rt5190a_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| .max_register = RT5190A_REG_HOTDIEMASK, |
| }; |
| |
| static int rt5190a_probe(struct i2c_client *i2c) |
| { |
| struct rt5190a_priv *priv; |
| struct regulator_config cfg = {}; |
| int i, ret; |
| |
| priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| |
| priv->dev = &i2c->dev; |
| |
| priv->regmap = devm_regmap_init_i2c(i2c, &rt5190a_regmap_config); |
| if (IS_ERR(priv->regmap)) { |
| dev_err(&i2c->dev, "Failed to allocate regmap\n"); |
| return PTR_ERR(priv->regmap); |
| } |
| |
| ret = rt5190a_device_check(priv); |
| if (ret) { |
| dev_err(&i2c->dev, "Failed to check device %d\n", ret); |
| return ret; |
| } |
| |
| ret = rt5190a_device_initialize(priv); |
| if (ret) { |
| dev_err(&i2c->dev, "Failed to initialize the device\n"); |
| return ret; |
| } |
| |
| ret = rt5190a_parse_regulator_dt_data(priv); |
| if (ret) { |
| dev_err(&i2c->dev, "Failed to parse regulator dt\n"); |
| return ret; |
| } |
| |
| cfg.dev = &i2c->dev; |
| cfg.regmap = priv->regmap; |
| |
| for (i = 0; i < RT5190A_MAX_IDX; i++) { |
| struct regulator_desc *desc = priv->rdesc + i; |
| struct of_regulator_match *match = rt5190a_regulator_match + i; |
| |
| cfg.init_data = match->init_data; |
| cfg.of_node = match->of_node; |
| |
| priv->rdev[i] = devm_regulator_register(&i2c->dev, desc, &cfg); |
| if (IS_ERR(priv->rdev[i])) { |
| dev_err(&i2c->dev, "Failed to register regulator %s\n", |
| desc->name); |
| return PTR_ERR(priv->rdev[i]); |
| } |
| } |
| |
| if (i2c->irq) { |
| ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
| rt5190a_irq_handler, |
| IRQF_ONESHOT, |
| dev_name(&i2c->dev), priv); |
| if (ret) { |
| dev_err(&i2c->dev, "Failed to register interrupt\n"); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct of_device_id __maybe_unused rt5190a_device_table[] = { |
| { .compatible = "richtek,rt5190a", }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(of, rt5190a_device_table); |
| |
| static struct i2c_driver rt5190a_driver = { |
| .driver = { |
| .name = "rt5190a", |
| .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
| .of_match_table = rt5190a_device_table, |
| }, |
| .probe_new = rt5190a_probe, |
| }; |
| module_i2c_driver(rt5190a_driver); |
| |
| MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); |
| MODULE_DESCRIPTION("Richtek RT5190A Regulator Driver"); |
| MODULE_LICENSE("GPL v2"); |