// SPDX-License-Identifier: GPL-2.0+ #include #include #include #include #include #include #include #include #include #include /* Register */ #define RTQ2208_REG_GLOBAL_INT1 0x12 #define RTQ2208_REG_FLT_RECORDBUCK_CB 0x18 #define RTQ2208_REG_GLOBAL_INT1_MASK 0x1D #define RTQ2208_REG_FLT_MASKBUCK_CB 0x1F #define RTQ2208_REG_BUCK_C_CFG0 0x32 #define RTQ2208_REG_BUCK_B_CFG0 0x42 #define RTQ2208_REG_BUCK_A_CFG0 0x52 #define RTQ2208_REG_BUCK_D_CFG0 0x62 #define RTQ2208_REG_BUCK_G_CFG0 0x72 #define RTQ2208_REG_BUCK_F_CFG0 0x82 #define RTQ2208_REG_BUCK_E_CFG0 0x92 #define RTQ2208_REG_BUCK_H_CFG0 0xA2 #define RTQ2208_REG_LDO1_CFG 0xB1 #define RTQ2208_REG_LDO2_CFG 0xC1 /* Mask */ #define RTQ2208_BUCK_NR_MTP_SEL_MASK GENMASK(7, 0) #define RTQ2208_BUCK_EN_NR_MTP_SEL0_MASK BIT(0) #define RTQ2208_BUCK_EN_NR_MTP_SEL1_MASK BIT(1) #define RTQ2208_BUCK_RSPUP_MASK GENMASK(6, 4) #define RTQ2208_BUCK_RSPDN_MASK GENMASK(2, 0) #define RTQ2208_BUCK_NRMODE_MASK BIT(5) #define RTQ2208_BUCK_STRMODE_MASK BIT(5) #define RTQ2208_BUCK_EN_STR_MASK BIT(0) #define RTQ2208_LDO_EN_STR_MASK BIT(7) #define RTQ2208_EN_DIS_MASK BIT(0) #define RTQ2208_BUCK_RAMP_SEL_MASK GENMASK(2, 0) #define RTQ2208_HD_INT_MASK BIT(0) /* Size */ #define RTQ2208_VOUT_MAXNUM 256 #define RTQ2208_BUCK_NUM_IRQ_REGS 5 #define RTQ2208_STS_NUM_IRQ_REGS 2 /* Value */ #define RTQ2208_RAMP_VALUE_MIN_uV 500 #define RTQ2208_RAMP_VALUE_MAX_uV 64000 #define RTQ2208_BUCK_MASK(uv_irq, ov_irq) (1 << ((uv_irq) % 8) | 1 << ((ov_irq) % 8)) enum { RTQ2208_BUCK_B = 0, RTQ2208_BUCK_C, RTQ2208_BUCK_D, RTQ2208_BUCK_A, RTQ2208_BUCK_F, RTQ2208_BUCK_G, RTQ2208_BUCK_H, RTQ2208_BUCK_E, RTQ2208_LDO2, RTQ2208_LDO1, RTQ2208_LDO_MAX, }; enum { RTQ2208_AUTO_MODE = 0, RTQ2208_FCCM, }; struct rtq2208_regulator_desc { struct regulator_desc desc; unsigned int mtp_sel_reg; unsigned int mtp_sel_mask; unsigned int mode_reg; unsigned int mode_mask; unsigned int suspend_config_reg; unsigned int suspend_enable_mask; unsigned int suspend_mode_mask; }; struct rtq2208_rdev_map { struct regulator_dev *rdev[RTQ2208_LDO_MAX]; struct regmap *regmap; struct device *dev; }; /* set Normal Auto/FCCM mode */ static int rtq2208_set_mode(struct regulator_dev *rdev, unsigned int mode) { const struct rtq2208_regulator_desc *rdesc = (const struct rtq2208_regulator_desc *)rdev->desc; unsigned int val, shift; switch (mode) { case REGULATOR_MODE_NORMAL: val = RTQ2208_AUTO_MODE; break; case REGULATOR_MODE_FAST: val = RTQ2208_FCCM; break; default: return -EINVAL; } shift = ffs(rdesc->mode_mask) - 1; return regmap_update_bits(rdev->regmap, rdesc->mode_reg, rdesc->mode_mask, val << shift); } static unsigned int rtq2208_get_mode(struct regulator_dev *rdev) { const struct rtq2208_regulator_desc *rdesc = (const struct rtq2208_regulator_desc *)rdev->desc; unsigned int mode_val; int ret; ret = regmap_read(rdev->regmap, rdesc->mode_reg, &mode_val); if (ret) return REGULATOR_MODE_INVALID; return (mode_val & rdesc->mode_mask) ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; } static int rtq2208_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { const struct regulator_desc *desc = rdev->desc; unsigned int sel = 0, val; ramp_delay = max(ramp_delay, RTQ2208_RAMP_VALUE_MIN_uV); ramp_delay = min(ramp_delay, RTQ2208_RAMP_VALUE_MAX_uV); ramp_delay /= RTQ2208_RAMP_VALUE_MIN_uV; /* * fls(ramp_delay) - 1: doing LSB shift, let it starts from 0 * * RTQ2208_BUCK_RAMP_SEL_MASK - sel: doing descending order shifting. * Because the relation of seleltion and value is like that * * seletion: value * 000: 64mv * 001: 32mv * ... * 111: 0.5mv * * For example, if I would like to select 64mv, the fls(ramp_delay) - 1 will be 0b111, * and I need to use 0b111 - sel to do the shifting */ sel = fls(ramp_delay) - 1; sel = RTQ2208_BUCK_RAMP_SEL_MASK - sel; val = FIELD_PREP(RTQ2208_BUCK_RSPUP_MASK, sel) | FIELD_PREP(RTQ2208_BUCK_RSPDN_MASK, sel); return regmap_update_bits(rdev->regmap, desc->ramp_reg, RTQ2208_BUCK_RSPUP_MASK | RTQ2208_BUCK_RSPDN_MASK, val); } static int rtq2208_set_suspend_enable(struct regulator_dev *rdev) { const struct rtq2208_regulator_desc *rdesc = (const struct rtq2208_regulator_desc *)rdev->desc; return regmap_set_bits(rdev->regmap, rdesc->suspend_config_reg, rdesc->suspend_enable_mask); } static int rtq2208_set_suspend_disable(struct regulator_dev *rdev) { const struct rtq2208_regulator_desc *rdesc = (const struct rtq2208_regulator_desc *)rdev->desc; return regmap_update_bits(rdev->regmap, rdesc->suspend_config_reg, rdesc->suspend_enable_mask, 0); } static int rtq2208_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode) { const struct rtq2208_regulator_desc *rdesc = (const struct rtq2208_regulator_desc *)rdev->desc; unsigned int val, shift; switch (mode) { case REGULATOR_MODE_NORMAL: val = RTQ2208_AUTO_MODE; break; case REGULATOR_MODE_FAST: val = RTQ2208_FCCM; break; default: return -EINVAL; } shift = ffs(rdesc->suspend_mode_mask) - 1; return regmap_update_bits(rdev->regmap, rdesc->suspend_config_reg, rdesc->suspend_mode_mask, val << shift); } static const struct regulator_ops rtq2208_regulator_buck_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear_range, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_mode = rtq2208_set_mode, .get_mode = rtq2208_get_mode, .set_ramp_delay = rtq2208_set_ramp_delay, .set_active_discharge = regulator_set_active_discharge_regmap, .set_suspend_enable = rtq2208_set_suspend_enable, .set_suspend_disable = rtq2208_set_suspend_disable, .set_suspend_mode = rtq2208_set_suspend_mode, }; static const struct regulator_ops rtq2208_regulator_ldo_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .set_active_discharge = regulator_set_active_discharge_regmap, .set_suspend_enable = rtq2208_set_suspend_enable, .set_suspend_disable = rtq2208_set_suspend_disable, }; static unsigned int rtq2208_of_map_mode(unsigned int mode) { switch (mode) { case RTQ2208_AUTO_MODE: return REGULATOR_MODE_NORMAL; case RTQ2208_FCCM: return REGULATOR_MODE_FAST; default: return REGULATOR_MODE_INVALID; } } static int rtq2208_init_irq_mask(struct rtq2208_rdev_map *rdev_map, unsigned int *buck_masks) { unsigned char buck_clr_masks[5] = {0x33, 0x33, 0x33, 0x33, 0x33}, sts_clr_masks[2] = {0xE7, 0xF7}, sts_masks[2] = {0xE6, 0xF6}; int ret; /* write clear all buck irq once */ ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_FLT_RECORDBUCK_CB, buck_clr_masks, 5); if (ret) return dev_err_probe(rdev_map->dev, ret, "Failed to clr buck irqs\n"); /* write clear general irq once */ ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1, sts_clr_masks, 2); if (ret) return dev_err_probe(rdev_map->dev, ret, "Failed to clr general irqs\n"); /* unmask buck ov/uv irq */ ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_FLT_MASKBUCK_CB, buck_masks, 5); if (ret) return dev_err_probe(rdev_map->dev, ret, "Failed to unmask buck irqs\n"); /* unmask needed general irq */ return regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1_MASK, sts_masks, 2); } static irqreturn_t rtq2208_irq_handler(int irqno, void *devid) { unsigned char buck_flags[RTQ2208_BUCK_NUM_IRQ_REGS], sts_flags[RTQ2208_STS_NUM_IRQ_REGS]; int ret = 0, i, uv_bit, ov_bit; struct rtq2208_rdev_map *rdev_map = devid; struct regulator_dev *rdev; if (!rdev_map) return IRQ_NONE; /* read irq event */ ret = regmap_bulk_read(rdev_map->regmap, RTQ2208_REG_FLT_RECORDBUCK_CB, buck_flags, ARRAY_SIZE(buck_flags)); if (ret) return IRQ_NONE; ret = regmap_bulk_read(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1, sts_flags, ARRAY_SIZE(sts_flags)); if (ret) return IRQ_NONE; /* clear irq event */ ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_FLT_RECORDBUCK_CB, buck_flags, ARRAY_SIZE(buck_flags)); if (ret) return IRQ_NONE; ret = regmap_bulk_write(rdev_map->regmap, RTQ2208_REG_GLOBAL_INT1, sts_flags, ARRAY_SIZE(sts_flags)); if (ret) return IRQ_NONE; for (i = 0; i < RTQ2208_LDO_MAX; i++) { if (!rdev_map->rdev[i]) continue; rdev = rdev_map->rdev[i]; /* uv irq */ uv_bit = (i & 1) ? 4 : 0; if (buck_flags[i >> 1] & (1 << uv_bit)) regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, NULL); /* ov irq */ ov_bit = uv_bit + 1; if (buck_flags[i >> 1] & (1 << ov_bit)) regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, NULL); /* hd irq */ if (sts_flags[1] & RTQ2208_HD_INT_MASK) regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_TEMP, NULL); } return IRQ_HANDLED; } #define RTQ2208_REGULATOR_INFO(_name, _base) \ { \ .name = #_name, \ .base = _base, \ } #define BUCK_RG_BASE(_id) RTQ2208_REG_BUCK_##_id##_CFG0 #define BUCK_RG_SHIFT(_base, _shift) (_base + _shift) #define LDO_RG_BASE(_id) RTQ2208_REG_LDO##_id##_CFG #define LDO_RG_SHIFT(_base, _shift) (_base + _shift) #define VSEL_SHIFT(_sel) (_sel ? 3 : 1) #define MTP_SEL_MASK(_sel) RTQ2208_BUCK_EN_NR_MTP_SEL##_sel##_MASK static const struct linear_range rtq2208_vout_range[] = { REGULATOR_LINEAR_RANGE(400000, 0, 180, 5000), REGULATOR_LINEAR_RANGE(1310000, 181, 255, 10000), }; static int rtq2208_of_get_fixed_voltage(struct device *dev, struct of_regulator_match *rtq2208_ldo_match, int n_fixed) { struct device_node *np; struct of_regulator_match *match; struct rtq2208_regulator_desc *rdesc; struct regulator_init_data *init_data; int ret, i; if (!dev->of_node) return -ENODEV; np = of_get_child_by_name(dev->of_node, "regulators"); if (!np) np = dev->of_node; ret = of_regulator_match(dev, np, rtq2208_ldo_match, n_fixed); of_node_put(np); if (ret < 0) return ret; for (i = 0; i < n_fixed; i++) { match = rtq2208_ldo_match + i; init_data = match->init_data; rdesc = (struct rtq2208_regulator_desc *)match->driver_data; if (!init_data || !rdesc) continue; if (init_data->constraints.min_uV == init_data->constraints.max_uV) rdesc->desc.fixed_uV = init_data->constraints.min_uV; } return 0; } static void rtq2208_init_regulator_desc(struct rtq2208_regulator_desc *rdesc, int mtp_sel, int idx, struct of_regulator_match *rtq2208_ldo_match, int *ldo_idx) { struct regulator_desc *desc; static const struct { char *name; int base; } regulator_info[] = { RTQ2208_REGULATOR_INFO(buck-b, BUCK_RG_BASE(B)), RTQ2208_REGULATOR_INFO(buck-c, BUCK_RG_BASE(C)), RTQ2208_REGULATOR_INFO(buck-d, BUCK_RG_BASE(D)), RTQ2208_REGULATOR_INFO(buck-a, BUCK_RG_BASE(A)), RTQ2208_REGULATOR_INFO(buck-f, BUCK_RG_BASE(F)), RTQ2208_REGULATOR_INFO(buck-g, BUCK_RG_BASE(G)), RTQ2208_REGULATOR_INFO(buck-h, BUCK_RG_BASE(H)), RTQ2208_REGULATOR_INFO(buck-e, BUCK_RG_BASE(E)), RTQ2208_REGULATOR_INFO(ldo2, LDO_RG_BASE(2)), RTQ2208_REGULATOR_INFO(ldo1, LDO_RG_BASE(1)), }, *curr_info; curr_info = regulator_info + idx; desc = &rdesc->desc; desc->name = curr_info->name; desc->of_match = of_match_ptr(curr_info->name); desc->regulators_node = of_match_ptr("regulators"); desc->id = idx; desc->owner = THIS_MODULE; desc->type = REGULATOR_VOLTAGE; desc->enable_mask = mtp_sel ? MTP_SEL_MASK(1) : MTP_SEL_MASK(0); desc->active_discharge_on = RTQ2208_EN_DIS_MASK; desc->active_discharge_off = 0; desc->active_discharge_mask = RTQ2208_EN_DIS_MASK; rdesc->mode_mask = RTQ2208_BUCK_NRMODE_MASK; if (idx >= RTQ2208_BUCK_B && idx <= RTQ2208_BUCK_E) { /* init buck desc */ desc->enable_reg = BUCK_RG_SHIFT(curr_info->base, 2); desc->ops = &rtq2208_regulator_buck_ops; desc->vsel_reg = curr_info->base + VSEL_SHIFT(mtp_sel); desc->vsel_mask = RTQ2208_BUCK_NR_MTP_SEL_MASK; desc->n_voltages = RTQ2208_VOUT_MAXNUM; desc->linear_ranges = rtq2208_vout_range; desc->n_linear_ranges = ARRAY_SIZE(rtq2208_vout_range); desc->ramp_reg = BUCK_RG_SHIFT(curr_info->base, 5); desc->active_discharge_reg = curr_info->base; desc->of_map_mode = rtq2208_of_map_mode; rdesc->mode_reg = BUCK_RG_SHIFT(curr_info->base, 2); rdesc->suspend_config_reg = BUCK_RG_SHIFT(curr_info->base, 4); rdesc->suspend_enable_mask = RTQ2208_BUCK_EN_STR_MASK; rdesc->suspend_mode_mask = RTQ2208_BUCK_STRMODE_MASK; } else { /* init ldo desc */ desc->enable_reg = curr_info->base; desc->ops = &rtq2208_regulator_ldo_ops; desc->n_voltages = 1; desc->active_discharge_reg = LDO_RG_SHIFT(curr_info->base, 2); rtq2208_ldo_match[*ldo_idx].name = desc->name; rtq2208_ldo_match[*ldo_idx].driver_data = rdesc; rtq2208_ldo_match[(*ldo_idx)++].desc = desc; rdesc->suspend_config_reg = curr_info->base; rdesc->suspend_enable_mask = RTQ2208_LDO_EN_STR_MASK; } } static int rtq2208_parse_regulator_dt_data(int n_regulator, const unsigned int *regulator_idx_table, struct rtq2208_regulator_desc *rdesc[RTQ2208_LDO_MAX], struct device *dev) { struct of_regulator_match rtq2208_ldo_match[2]; int mtp_sel, ret, i, idx, ldo_idx = 0; /* get mtp_sel0 or mtp_sel1 */ mtp_sel = device_property_read_bool(dev, "richtek,mtp-sel-high"); for (i = 0; i < n_regulator; i++) { idx = regulator_idx_table[i]; rdesc[i] = devm_kcalloc(dev, 1, sizeof(*rdesc[0]), GFP_KERNEL); if (!rdesc[i]) return -ENOMEM; rtq2208_init_regulator_desc(rdesc[i], mtp_sel, idx, rtq2208_ldo_match, &ldo_idx); } /* init ldo fixed_uV */ ret = rtq2208_of_get_fixed_voltage(dev, rtq2208_ldo_match, ldo_idx); if (ret) return dev_err_probe(dev, ret, "Failed to get ldo fixed_uV\n"); return 0; } /** different slave address corresponds different used bucks * slave address 0x10: BUCK[BCA FGE] * slave address 0x20: BUCK[BC FGHE] * slave address 0x40: BUCK[C G] */ static int rtq2208_regulator_check(int slave_addr, int *num, int *regulator_idx_table, unsigned int *buck_masks) { static bool rtq2208_used_table[3][RTQ2208_LDO_MAX] = { /* BUCK[BCA FGE], LDO[12] */ {1, 1, 0, 1, 1, 1, 0, 1, 1, 1}, /* BUCK[BC FGHE], LDO[12]*/ {1, 1, 0, 0, 1, 1, 1, 1, 1, 1}, /* BUCK[C G], LDO[12] */ {0, 1, 0, 0, 0, 1, 0, 0, 1, 1}, }; int i, idx = ffs(slave_addr >> 4) - 1; u8 mask; for (i = 0; i < RTQ2208_LDO_MAX; i++) { if (!rtq2208_used_table[idx][i]) continue; regulator_idx_table[(*num)++] = i; mask = RTQ2208_BUCK_MASK(4 * i, 4 * i + 1); buck_masks[i >> 1] &= ~mask; } return 0; } static const struct regmap_config rtq2208_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = 0xEF, }; static int rtq2208_probe(struct i2c_client *i2c) { struct device *dev = &i2c->dev; struct regmap *regmap; struct rtq2208_regulator_desc *rdesc[RTQ2208_LDO_MAX]; struct regulator_dev *rdev; struct regulator_config cfg = {}; struct rtq2208_rdev_map *rdev_map; int i, ret = 0, idx, n_regulator = 0; unsigned int regulator_idx_table[RTQ2208_LDO_MAX], buck_masks[RTQ2208_BUCK_NUM_IRQ_REGS] = {0x33, 0x33, 0x33, 0x33, 0x33}; rdev_map = devm_kzalloc(dev, sizeof(struct rtq2208_rdev_map), GFP_KERNEL); if (!rdev_map) return -ENOMEM; regmap = devm_regmap_init_i2c(i2c, &rtq2208_regmap_config); if (IS_ERR(regmap)) return dev_err_probe(dev, PTR_ERR(regmap), "Failed to allocate regmap\n"); /* get needed regulator */ ret = rtq2208_regulator_check(i2c->addr, &n_regulator, regulator_idx_table, buck_masks); if (ret) return dev_err_probe(dev, ret, "Failed to check used regulators\n"); rdev_map->regmap = regmap; rdev_map->dev = dev; cfg.dev = dev; /* init regulator desc */ ret = rtq2208_parse_regulator_dt_data(n_regulator, regulator_idx_table, rdesc, dev); if (ret) return ret; for (i = 0; i < n_regulator; i++) { idx = regulator_idx_table[i]; /* register regulator */ rdev = devm_regulator_register(dev, &rdesc[i]->desc, &cfg); if (IS_ERR(rdev)) return PTR_ERR(rdev); rdev_map->rdev[idx] = rdev; } /* init interrupt mask */ ret = rtq2208_init_irq_mask(rdev_map, buck_masks); if (ret) return ret; /* register interrupt */ return devm_request_threaded_irq(dev, i2c->irq, NULL, rtq2208_irq_handler, IRQF_ONESHOT, dev_name(dev), rdev_map); } static const struct of_device_id rtq2208_device_tables[] = { { .compatible = "richtek,rtq2208" }, {} }; MODULE_DEVICE_TABLE(of, rtq2208_device_tables); static struct i2c_driver rtq2208_driver = { .driver = { .name = "rtq2208", .of_match_table = rtq2208_device_tables, }, .probe = rtq2208_probe, }; module_i2c_driver(rtq2208_driver); MODULE_AUTHOR("Alina Yu "); MODULE_DESCRIPTION("Richtek RTQ2208 Regulator Driver"); MODULE_LICENSE("GPL");