// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2020 ROHM Semiconductors // ROHM BD9576MUF/BD9573MUF regulator driver #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define BD957X_VOUTS1_VOLT 3300000 #define BD957X_VOUTS4_BASE_VOLT 1030000 #define BD957X_VOUTS34_NUM_VOLT 32 #define BD9576_THERM_IRQ_MASK_TW BIT(5) #define BD9576_xVD_IRQ_MASK_VOUTL1 BIT(5) #define BD9576_UVD_IRQ_MASK_VOUTS1_OCW BIT(6) #define BD9576_xVD_IRQ_MASK_VOUT1TO4 0x0F static const unsigned int vout1_volt_table[] = { 5000000, 4900000, 4800000, 4700000, 4600000, 4500000, 4500000, 4500000, 5000000, 5100000, 5200000, 5300000, 5400000, 5500000, 5500000, 5500000 }; static const unsigned int vout2_volt_table[] = { 1800000, 1780000, 1760000, 1740000, 1720000, 1700000, 1680000, 1660000, 1800000, 1820000, 1840000, 1860000, 1880000, 1900000, 1920000, 1940000 }; static const unsigned int voutl1_volt_table[] = { 2500000, 2540000, 2580000, 2620000, 2660000, 2700000, 2740000, 2780000, 2500000, 2460000, 2420000, 2380000, 2340000, 2300000, 2260000, 2220000 }; static const struct linear_range vout1_xvd_ranges[] = { REGULATOR_LINEAR_RANGE(225000, 0x01, 0x2b, 0), REGULATOR_LINEAR_RANGE(225000, 0x2c, 0x54, 5000), REGULATOR_LINEAR_RANGE(425000, 0x55, 0x7f, 0), }; static const struct linear_range vout234_xvd_ranges[] = { REGULATOR_LINEAR_RANGE(17000, 0x01, 0x0f, 0), REGULATOR_LINEAR_RANGE(17000, 0x10, 0x6d, 1000), REGULATOR_LINEAR_RANGE(110000, 0x6e, 0x7f, 0), }; static const struct linear_range voutL1_xvd_ranges[] = { REGULATOR_LINEAR_RANGE(34000, 0x01, 0x0f, 0), REGULATOR_LINEAR_RANGE(34000, 0x10, 0x6d, 2000), REGULATOR_LINEAR_RANGE(220000, 0x6e, 0x7f, 0), }; static const struct linear_range voutS1_ocw_ranges_internal[] = { REGULATOR_LINEAR_RANGE(200000, 0x01, 0x04, 0), REGULATOR_LINEAR_RANGE(250000, 0x05, 0x18, 50000), REGULATOR_LINEAR_RANGE(1200000, 0x19, 0x3f, 0), }; static const struct linear_range voutS1_ocw_ranges[] = { REGULATOR_LINEAR_RANGE(50000, 0x01, 0x04, 0), REGULATOR_LINEAR_RANGE(60000, 0x05, 0x18, 10000), REGULATOR_LINEAR_RANGE(250000, 0x19, 0x3f, 0), }; static const struct linear_range voutS1_ocp_ranges_internal[] = { REGULATOR_LINEAR_RANGE(300000, 0x01, 0x06, 0), REGULATOR_LINEAR_RANGE(350000, 0x7, 0x1b, 50000), REGULATOR_LINEAR_RANGE(1350000, 0x1c, 0x3f, 0), }; static const struct linear_range voutS1_ocp_ranges[] = { REGULATOR_LINEAR_RANGE(70000, 0x01, 0x06, 0), REGULATOR_LINEAR_RANGE(80000, 0x7, 0x1b, 10000), REGULATOR_LINEAR_RANGE(280000, 0x1c, 0x3f, 0), }; struct bd957x_regulator_data { struct regulator_desc desc; int base_voltage; struct regulator_dev *rdev; int ovd_notif; int uvd_notif; int temp_notif; int ovd_err; int uvd_err; int temp_err; const struct linear_range *xvd_ranges; int num_xvd_ranges; bool oc_supported; unsigned int ovd_reg; unsigned int uvd_reg; unsigned int xvd_mask; unsigned int ocp_reg; unsigned int ocp_mask; unsigned int ocw_reg; unsigned int ocw_mask; unsigned int ocw_rfet; }; #define BD9576_NUM_REGULATORS 6 #define BD9576_NUM_OVD_REGULATORS 5 struct bd957x_data { struct bd957x_regulator_data regulator_data[BD9576_NUM_REGULATORS]; struct regmap *regmap; struct delayed_work therm_irq_suppress; struct delayed_work ovd_irq_suppress; struct delayed_work uvd_irq_suppress; unsigned int therm_irq; unsigned int ovd_irq; unsigned int uvd_irq; spinlock_t err_lock; int regulator_global_err; }; static int bd957x_vout34_list_voltage(struct regulator_dev *rdev, unsigned int selector) { const struct regulator_desc *desc = rdev->desc; int multiplier = selector & desc->vsel_mask & 0x7f; int tune; /* VOUT3 and 4 has 10mV step */ tune = multiplier * 10000; if (!(selector & 0x80)) return desc->fixed_uV - tune; return desc->fixed_uV + tune; } static int bd957x_list_voltage(struct regulator_dev *rdev, unsigned int selector) { const struct regulator_desc *desc = rdev->desc; int index = selector & desc->vsel_mask & 0x7f; if (!(selector & 0x80)) index += desc->n_voltages/2; if (index >= desc->n_voltages) return -EINVAL; return desc->volt_table[index]; } static void bd9576_fill_ovd_flags(struct bd957x_regulator_data *data, bool warn) { if (warn) { data->ovd_notif = REGULATOR_EVENT_OVER_VOLTAGE_WARN; data->ovd_err = REGULATOR_ERROR_OVER_VOLTAGE_WARN; } else { data->ovd_notif = REGULATOR_EVENT_REGULATION_OUT; data->ovd_err = REGULATOR_ERROR_REGULATION_OUT; } } static void bd9576_fill_ocp_flags(struct bd957x_regulator_data *data, bool warn) { if (warn) { data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT_WARN; data->uvd_err = REGULATOR_ERROR_OVER_CURRENT_WARN; } else { data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT; data->uvd_err = REGULATOR_ERROR_OVER_CURRENT; } } static void bd9576_fill_uvd_flags(struct bd957x_regulator_data *data, bool warn) { if (warn) { data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE_WARN; data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE_WARN; } else { data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE; data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE; } } static void bd9576_fill_temp_flags(struct bd957x_regulator_data *data, bool enable, bool warn) { if (!enable) { data->temp_notif = 0; data->temp_err = 0; } else if (warn) { data->temp_notif = REGULATOR_EVENT_OVER_TEMP_WARN; data->temp_err = REGULATOR_ERROR_OVER_TEMP_WARN; } else { data->temp_notif = REGULATOR_EVENT_OVER_TEMP; data->temp_err = REGULATOR_ERROR_OVER_TEMP; } } static int bd9576_set_limit(const struct linear_range *r, int num_ranges, struct regmap *regmap, int reg, int mask, int lim) { int ret; bool found; int sel = 0; if (lim) { ret = linear_range_get_selector_low_array(r, num_ranges, lim, &sel, &found); if (ret) return ret; if (!found) dev_warn(regmap_get_device(regmap), "limit %d out of range. Setting lower\n", lim); } return regmap_update_bits(regmap, reg, mask, sel); } static bool check_ocp_flag_mismatch(struct regulator_dev *rdev, int severity, struct bd957x_regulator_data *r) { if ((severity == REGULATOR_SEVERITY_ERR && r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT) || (severity == REGULATOR_SEVERITY_WARN && r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT_WARN)) { dev_warn(rdev_get_dev(rdev), "Can't support both OCP WARN and ERR\n"); /* Do not overwrite ERR config with WARN */ if (severity == REGULATOR_SEVERITY_WARN) return true; bd9576_fill_ocp_flags(r, 0); } return false; } static bool check_uvd_flag_mismatch(struct regulator_dev *rdev, int severity, struct bd957x_regulator_data *r) { if ((severity == REGULATOR_SEVERITY_ERR && r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE) || (severity == REGULATOR_SEVERITY_WARN && r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE_WARN)) { dev_warn(rdev_get_dev(rdev), "Can't support both UVD WARN and ERR\n"); if (severity == REGULATOR_SEVERITY_WARN) return true; bd9576_fill_uvd_flags(r, 0); } return false; } static bool check_ovd_flag_mismatch(struct regulator_dev *rdev, int severity, struct bd957x_regulator_data *r) { if ((severity == REGULATOR_SEVERITY_ERR && r->ovd_notif != REGULATOR_EVENT_REGULATION_OUT) || (severity == REGULATOR_SEVERITY_WARN && r->ovd_notif != REGULATOR_EVENT_OVER_VOLTAGE_WARN)) { dev_warn(rdev_get_dev(rdev), "Can't support both OVD WARN and ERR\n"); if (severity == REGULATOR_SEVERITY_WARN) return true; bd9576_fill_ovd_flags(r, 0); } return false; } static bool check_temp_flag_mismatch(struct regulator_dev *rdev, int severity, struct bd957x_regulator_data *r) { if ((severity == REGULATOR_SEVERITY_ERR && r->temp_notif != REGULATOR_EVENT_OVER_TEMP) || (severity == REGULATOR_SEVERITY_WARN && r->temp_notif != REGULATOR_EVENT_OVER_TEMP_WARN)) { dev_warn(rdev_get_dev(rdev), "Can't support both thermal WARN and ERR\n"); if (severity == REGULATOR_SEVERITY_WARN) return true; } return false; } static int bd9576_set_ocp(struct regulator_dev *rdev, int lim_uA, int severity, bool enable) { struct bd957x_data *d; struct bd957x_regulator_data *r; int reg, mask; int Vfet, rfet; const struct linear_range *range; int num_ranges; if ((lim_uA && !enable) || (!lim_uA && enable)) return -EINVAL; r = container_of(rdev->desc, struct bd957x_regulator_data, desc); if (!r->oc_supported) return -EINVAL; d = rdev_get_drvdata(rdev); if (severity == REGULATOR_SEVERITY_PROT) { reg = r->ocp_reg; mask = r->ocp_mask; if (r->ocw_rfet) { range = voutS1_ocp_ranges; num_ranges = ARRAY_SIZE(voutS1_ocp_ranges); rfet = r->ocw_rfet / 1000; } else { range = voutS1_ocp_ranges_internal; num_ranges = ARRAY_SIZE(voutS1_ocp_ranges_internal); /* Internal values are already micro-amperes */ rfet = 1000; } } else { reg = r->ocw_reg; mask = r->ocw_mask; if (r->ocw_rfet) { range = voutS1_ocw_ranges; num_ranges = ARRAY_SIZE(voutS1_ocw_ranges); rfet = r->ocw_rfet / 1000; } else { range = voutS1_ocw_ranges_internal; num_ranges = ARRAY_SIZE(voutS1_ocw_ranges_internal); /* Internal values are already micro-amperes */ rfet = 1000; } /* We abuse uvd fields for OCW on VoutS1 */ if (r->uvd_notif) { /* * If both warning and error are requested, prioritize * ERROR configuration */ if (check_ocp_flag_mismatch(rdev, severity, r)) return 0; } else { bool warn = severity == REGULATOR_SEVERITY_WARN; bd9576_fill_ocp_flags(r, warn); } } /* * limits are given in uA, rfet is mOhm * Divide lim_uA by 1000 to get Vfet in uV. * (We expect both Rfet and limit uA to be magnitude of hundreds of * milli Amperes & milli Ohms => we should still have decent accuracy) */ Vfet = lim_uA/1000 * rfet; return bd9576_set_limit(range, num_ranges, d->regmap, reg, mask, Vfet); } static int bd9576_set_uvp(struct regulator_dev *rdev, int lim_uV, int severity, bool enable) { struct bd957x_data *d; struct bd957x_regulator_data *r; int mask, reg; if (severity == REGULATOR_SEVERITY_PROT) { if (!enable || lim_uV) return -EINVAL; return 0; } /* * BD9576 has enable control as a special value in limit reg. Can't * set limit but keep feature disabled or enable W/O given limit. */ if ((lim_uV && !enable) || (!lim_uV && enable)) return -EINVAL; r = container_of(rdev->desc, struct bd957x_regulator_data, desc); d = rdev_get_drvdata(rdev); mask = r->xvd_mask; reg = r->uvd_reg; /* * Check that there is no mismatch for what the detection IRQs are to * be used. */ if (r->uvd_notif) { if (check_uvd_flag_mismatch(rdev, severity, r)) return 0; } else { bd9576_fill_uvd_flags(r, severity == REGULATOR_SEVERITY_WARN); } return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap, reg, mask, lim_uV); } static int bd9576_set_ovp(struct regulator_dev *rdev, int lim_uV, int severity, bool enable) { struct bd957x_data *d; struct bd957x_regulator_data *r; int mask, reg; if (severity == REGULATOR_SEVERITY_PROT) { if (!enable || lim_uV) return -EINVAL; return 0; } /* * BD9576 has enable control as a special value in limit reg. Can't * set limit but keep feature disabled or enable W/O given limit. */ if ((lim_uV && !enable) || (!lim_uV && enable)) return -EINVAL; r = container_of(rdev->desc, struct bd957x_regulator_data, desc); d = rdev_get_drvdata(rdev); mask = r->xvd_mask; reg = r->ovd_reg; /* * Check that there is no mismatch for what the detection IRQs are to * be used. */ if (r->ovd_notif) { if (check_ovd_flag_mismatch(rdev, severity, r)) return 0; } else { bd9576_fill_ovd_flags(r, severity == REGULATOR_SEVERITY_WARN); } return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap, reg, mask, lim_uV); } static int bd9576_set_tw(struct regulator_dev *rdev, int lim, int severity, bool enable) { struct bd957x_data *d; struct bd957x_regulator_data *r; int i; /* * BD9576MUF has fixed temperature limits * The detection can only be enabled/disabled */ if (lim) return -EINVAL; /* Protection can't be disabled */ if (severity == REGULATOR_SEVERITY_PROT) { if (!enable) return -EINVAL; else return 0; } r = container_of(rdev->desc, struct bd957x_regulator_data, desc); d = rdev_get_drvdata(rdev); /* * Check that there is no mismatch for what the detection IRQs are to * be used. */ if (r->temp_notif) if (check_temp_flag_mismatch(rdev, severity, r)) return 0; bd9576_fill_temp_flags(r, enable, severity == REGULATOR_SEVERITY_WARN); if (enable) return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK, BD9576_THERM_IRQ_MASK_TW, 0); /* * If any of the regulators is interested in thermal warning we keep IRQ * enabled. */ for (i = 0; i < BD9576_NUM_REGULATORS; i++) if (d->regulator_data[i].temp_notif) return 0; return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK, BD9576_THERM_IRQ_MASK_TW, BD9576_THERM_IRQ_MASK_TW); } static const struct regulator_ops bd9573_vout34_ops = { .is_enabled = regulator_is_enabled_regmap, .list_voltage = bd957x_vout34_list_voltage, .get_voltage_sel = regulator_get_voltage_sel_regmap, }; static const struct regulator_ops bd9576_vout34_ops = { .is_enabled = regulator_is_enabled_regmap, .list_voltage = bd957x_vout34_list_voltage, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_over_voltage_protection = bd9576_set_ovp, .set_under_voltage_protection = bd9576_set_uvp, .set_thermal_protection = bd9576_set_tw, }; static const struct regulator_ops bd9573_vouts1_regulator_ops = { .is_enabled = regulator_is_enabled_regmap, }; static const struct regulator_ops bd9576_vouts1_regulator_ops = { .is_enabled = regulator_is_enabled_regmap, .set_over_current_protection = bd9576_set_ocp, }; static const struct regulator_ops bd9573_ops = { .is_enabled = regulator_is_enabled_regmap, .list_voltage = bd957x_list_voltage, .get_voltage_sel = regulator_get_voltage_sel_regmap, }; static const struct regulator_ops bd9576_ops = { .is_enabled = regulator_is_enabled_regmap, .list_voltage = bd957x_list_voltage, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_over_voltage_protection = bd9576_set_ovp, .set_under_voltage_protection = bd9576_set_uvp, .set_thermal_protection = bd9576_set_tw, }; static const struct regulator_ops *bd9573_ops_arr[] = { [BD957X_VD50] = &bd9573_ops, [BD957X_VD18] = &bd9573_ops, [BD957X_VDDDR] = &bd9573_vout34_ops, [BD957X_VD10] = &bd9573_vout34_ops, [BD957X_VOUTL1] = &bd9573_ops, [BD957X_VOUTS1] = &bd9573_vouts1_regulator_ops, }; static const struct regulator_ops *bd9576_ops_arr[] = { [BD957X_VD50] = &bd9576_ops, [BD957X_VD18] = &bd9576_ops, [BD957X_VDDDR] = &bd9576_vout34_ops, [BD957X_VD10] = &bd9576_vout34_ops, [BD957X_VOUTL1] = &bd9576_ops, [BD957X_VOUTS1] = &bd9576_vouts1_regulator_ops, }; static int vouts1_get_fet_res(struct device_node *np, const struct regulator_desc *desc, struct regulator_config *cfg) { struct bd957x_regulator_data *data; int ret; u32 uohms; data = container_of(desc, struct bd957x_regulator_data, desc); ret = of_property_read_u32(np, "rohm,ocw-fet-ron-micro-ohms", &uohms); if (ret) { if (ret != -EINVAL) return ret; return 0; } data->ocw_rfet = uohms; return 0; } static struct bd957x_data bd957x_regulators = { .regulator_data = { { .desc = { .name = "VD50", .of_match = of_match_ptr("regulator-vd50"), .regulators_node = of_match_ptr("regulators"), .id = BD957X_VD50, .type = REGULATOR_VOLTAGE, .volt_table = &vout1_volt_table[0], .n_voltages = ARRAY_SIZE(vout1_volt_table), .vsel_reg = BD957X_REG_VOUT1_TUNE, .vsel_mask = BD957X_MASK_VOUT1_TUNE, .enable_reg = BD957X_REG_POW_TRIGGER1, .enable_mask = BD957X_REGULATOR_EN_MASK, .enable_val = BD957X_REGULATOR_DIS_VAL, .enable_is_inverted = true, .owner = THIS_MODULE, }, .xvd_ranges = vout1_xvd_ranges, .num_xvd_ranges = ARRAY_SIZE(vout1_xvd_ranges), .ovd_reg = BD9576_REG_VOUT1_OVD, .uvd_reg = BD9576_REG_VOUT1_UVD, .xvd_mask = BD9576_MASK_XVD, }, { .desc = { .name = "VD18", .of_match = of_match_ptr("regulator-vd18"), .regulators_node = of_match_ptr("regulators"), .id = BD957X_VD18, .type = REGULATOR_VOLTAGE, .volt_table = &vout2_volt_table[0], .n_voltages = ARRAY_SIZE(vout2_volt_table), .vsel_reg = BD957X_REG_VOUT2_TUNE, .vsel_mask = BD957X_MASK_VOUT2_TUNE, .enable_reg = BD957X_REG_POW_TRIGGER2, .enable_mask = BD957X_REGULATOR_EN_MASK, .enable_val = BD957X_REGULATOR_DIS_VAL, .enable_is_inverted = true, .owner = THIS_MODULE, }, .xvd_ranges = vout234_xvd_ranges, .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges), .ovd_reg = BD9576_REG_VOUT2_OVD, .uvd_reg = BD9576_REG_VOUT2_UVD, .xvd_mask = BD9576_MASK_XVD, }, { .desc = { .name = "VDDDR", .of_match = of_match_ptr("regulator-vdddr"), .regulators_node = of_match_ptr("regulators"), .id = BD957X_VDDDR, .type = REGULATOR_VOLTAGE, .n_voltages = BD957X_VOUTS34_NUM_VOLT, .vsel_reg = BD957X_REG_VOUT3_TUNE, .vsel_mask = BD957X_MASK_VOUT3_TUNE, .enable_reg = BD957X_REG_POW_TRIGGER3, .enable_mask = BD957X_REGULATOR_EN_MASK, .enable_val = BD957X_REGULATOR_DIS_VAL, .enable_is_inverted = true, .owner = THIS_MODULE, }, .ovd_reg = BD9576_REG_VOUT3_OVD, .uvd_reg = BD9576_REG_VOUT3_UVD, .xvd_mask = BD9576_MASK_XVD, .xvd_ranges = vout234_xvd_ranges, .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges), }, { .desc = { .name = "VD10", .of_match = of_match_ptr("regulator-vd10"), .regulators_node = of_match_ptr("regulators"), .id = BD957X_VD10, .type = REGULATOR_VOLTAGE, .fixed_uV = BD957X_VOUTS4_BASE_VOLT, .n_voltages = BD957X_VOUTS34_NUM_VOLT, .vsel_reg = BD957X_REG_VOUT4_TUNE, .vsel_mask = BD957X_MASK_VOUT4_TUNE, .enable_reg = BD957X_REG_POW_TRIGGER4, .enable_mask = BD957X_REGULATOR_EN_MASK, .enable_val = BD957X_REGULATOR_DIS_VAL, .enable_is_inverted = true, .owner = THIS_MODULE, }, .xvd_ranges = vout234_xvd_ranges, .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges), .ovd_reg = BD9576_REG_VOUT4_OVD, .uvd_reg = BD9576_REG_VOUT4_UVD, .xvd_mask = BD9576_MASK_XVD, }, { .desc = { .name = "VOUTL1", .of_match = of_match_ptr("regulator-voutl1"), .regulators_node = of_match_ptr("regulators"), .id = BD957X_VOUTL1, .type = REGULATOR_VOLTAGE, .volt_table = &voutl1_volt_table[0], .n_voltages = ARRAY_SIZE(voutl1_volt_table), .vsel_reg = BD957X_REG_VOUTL1_TUNE, .vsel_mask = BD957X_MASK_VOUTL1_TUNE, .enable_reg = BD957X_REG_POW_TRIGGERL1, .enable_mask = BD957X_REGULATOR_EN_MASK, .enable_val = BD957X_REGULATOR_DIS_VAL, .enable_is_inverted = true, .owner = THIS_MODULE, }, .xvd_ranges = voutL1_xvd_ranges, .num_xvd_ranges = ARRAY_SIZE(voutL1_xvd_ranges), .ovd_reg = BD9576_REG_VOUTL1_OVD, .uvd_reg = BD9576_REG_VOUTL1_UVD, .xvd_mask = BD9576_MASK_XVD, }, { .desc = { .name = "VOUTS1", .of_match = of_match_ptr("regulator-vouts1"), .regulators_node = of_match_ptr("regulators"), .id = BD957X_VOUTS1, .type = REGULATOR_VOLTAGE, .n_voltages = 1, .fixed_uV = BD957X_VOUTS1_VOLT, .enable_reg = BD957X_REG_POW_TRIGGERS1, .enable_mask = BD957X_REGULATOR_EN_MASK, .enable_val = BD957X_REGULATOR_DIS_VAL, .enable_is_inverted = true, .owner = THIS_MODULE, .of_parse_cb = vouts1_get_fet_res, }, .oc_supported = true, .ocw_reg = BD9576_REG_VOUT1S_OCW, .ocw_mask = BD9576_MASK_VOUT1S_OCW, .ocp_reg = BD9576_REG_VOUT1S_OCP, .ocp_mask = BD9576_MASK_VOUT1S_OCP, }, }, }; static int bd9576_renable(struct regulator_irq_data *rid, int reg, int mask) { int val, ret; struct bd957x_data *d = (struct bd957x_data *)rid->data; ret = regmap_read(d->regmap, reg, &val); if (ret) return REGULATOR_FAILED_RETRY; if (rid->opaque && rid->opaque == (val & mask)) { /* * It seems we stil have same status. Ack and return * information that we are still out of limits and core * should not enable IRQ */ regmap_write(d->regmap, reg, mask & val); return REGULATOR_ERROR_ON; } rid->opaque = 0; /* * Status was changed. Either prolem was solved or we have new issues. * Let's re-enable IRQs and be prepared to report problems again */ return REGULATOR_ERROR_CLEARED; } static int bd9576_uvd_renable(struct regulator_irq_data *rid) { return bd9576_renable(rid, BD957X_REG_INT_UVD_STAT, UVD_IRQ_VALID_MASK); } static int bd9576_ovd_renable(struct regulator_irq_data *rid) { return bd9576_renable(rid, BD957X_REG_INT_OVD_STAT, OVD_IRQ_VALID_MASK); } static int bd9576_temp_renable(struct regulator_irq_data *rid) { return bd9576_renable(rid, BD957X_REG_INT_THERM_STAT, BD9576_THERM_IRQ_MASK_TW); } static int bd9576_uvd_handler(int irq, struct regulator_irq_data *rid, unsigned long *dev_mask) { int val, ret, i; struct bd957x_data *d = (struct bd957x_data *)rid->data; ret = regmap_read(d->regmap, BD957X_REG_INT_UVD_STAT, &val); if (ret) return REGULATOR_FAILED_RETRY; *dev_mask = 0; rid->opaque = val & UVD_IRQ_VALID_MASK; /* * Go through the set status bits and report either error or warning * to the notifier depending on what was flagged in DT */ *dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4; /* There is 1 bit gap in register after Vout1 .. Vout4 statuses */ *dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1); /* * We (ab)use the uvd for OCW notification. DT parsing should * have added correct OCW flag to uvd_notif and uvd_err for S1 */ *dev_mask |= ((val & BD9576_UVD_IRQ_MASK_VOUTS1_OCW) >> 1); for_each_set_bit(i, dev_mask, 6) { struct bd957x_regulator_data *rdata; struct regulator_err_state *stat; rdata = &d->regulator_data[i]; stat = &rid->states[i]; stat->notifs = rdata->uvd_notif; stat->errors = rdata->uvd_err; } ret = regmap_write(d->regmap, BD957X_REG_INT_UVD_STAT, UVD_IRQ_VALID_MASK & val); return 0; } static int bd9576_ovd_handler(int irq, struct regulator_irq_data *rid, unsigned long *dev_mask) { int val, ret, i; struct bd957x_data *d = (struct bd957x_data *)rid->data; ret = regmap_read(d->regmap, BD957X_REG_INT_OVD_STAT, &val); if (ret) return REGULATOR_FAILED_RETRY; rid->opaque = val & OVD_IRQ_VALID_MASK; *dev_mask = 0; if (!(val & OVD_IRQ_VALID_MASK)) return 0; *dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4; /* There is 1 bit gap in register after Vout1 .. Vout4 statuses */ *dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1); for_each_set_bit(i, dev_mask, 5) { struct bd957x_regulator_data *rdata; struct regulator_err_state *stat; rdata = &d->regulator_data[i]; stat = &rid->states[i]; stat->notifs = rdata->ovd_notif; stat->errors = rdata->ovd_err; } /* Clear the sub-IRQ status */ regmap_write(d->regmap, BD957X_REG_INT_OVD_STAT, OVD_IRQ_VALID_MASK & val); return 0; } #define BD9576_DEV_MASK_ALL_REGULATORS 0x3F static int bd9576_thermal_handler(int irq, struct regulator_irq_data *rid, unsigned long *dev_mask) { int val, ret, i; struct bd957x_data *d = (struct bd957x_data *)rid->data; ret = regmap_read(d->regmap, BD957X_REG_INT_THERM_STAT, &val); if (ret) return REGULATOR_FAILED_RETRY; if (!(val & BD9576_THERM_IRQ_MASK_TW)) { *dev_mask = 0; return 0; } *dev_mask = BD9576_DEV_MASK_ALL_REGULATORS; for (i = 0; i < BD9576_NUM_REGULATORS; i++) { struct bd957x_regulator_data *rdata; struct regulator_err_state *stat; rdata = &d->regulator_data[i]; stat = &rid->states[i]; stat->notifs = rdata->temp_notif; stat->errors = rdata->temp_err; } /* Clear the sub-IRQ status */ regmap_write(d->regmap, BD957X_REG_INT_THERM_STAT, BD9576_THERM_IRQ_MASK_TW); return 0; } static int bd957x_probe(struct platform_device *pdev) { int i; unsigned int num_reg_data; bool vout_mode, ddr_sel, may_have_irqs = false; struct regmap *regmap; struct bd957x_data *ic_data; struct regulator_config config = { 0 }; /* All regulators are related to UVD and thermal IRQs... */ struct regulator_dev *rdevs[BD9576_NUM_REGULATORS]; /* ...But VoutS1 is not flagged by OVD IRQ */ struct regulator_dev *ovd_devs[BD9576_NUM_OVD_REGULATORS]; static const struct regulator_irq_desc bd9576_notif_uvd = { .name = "bd9576-uvd", .irq_off_ms = 1000, .map_event = bd9576_uvd_handler, .renable = bd9576_uvd_renable, .data = &bd957x_regulators, }; static const struct regulator_irq_desc bd9576_notif_ovd = { .name = "bd9576-ovd", .irq_off_ms = 1000, .map_event = bd9576_ovd_handler, .renable = bd9576_ovd_renable, .data = &bd957x_regulators, }; static const struct regulator_irq_desc bd9576_notif_temp = { .name = "bd9576-temp", .irq_off_ms = 1000, .map_event = bd9576_thermal_handler, .renable = bd9576_temp_renable, .data = &bd957x_regulators, }; enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data; num_reg_data = ARRAY_SIZE(bd957x_regulators.regulator_data); ic_data = &bd957x_regulators; regmap = dev_get_regmap(pdev->dev.parent, NULL); if (!regmap) { dev_err(&pdev->dev, "No regmap\n"); return -EINVAL; } ic_data->regmap = regmap; vout_mode = device_property_read_bool(pdev->dev.parent, "rohm,vout1-en-low"); if (vout_mode) { struct gpio_desc *en; dev_dbg(&pdev->dev, "GPIO controlled mode\n"); /* VOUT1 enable state judged by VOUT1_EN pin */ /* See if we have GPIO defined */ en = devm_fwnode_gpiod_get(&pdev->dev, dev_fwnode(pdev->dev.parent), "rohm,vout1-en", GPIOD_OUT_LOW, "vout1-en"); /* VOUT1_OPS gpio ctrl */ /* * Regulator core prioritizes the ena_gpio over * enable/disable/is_enabled callbacks so no need to clear them * even if GPIO is used. So, we can still use same ops. * * In theory it is possible someone wants to set vout1-en LOW * during OTP loading and set VOUT1 to be controlled by GPIO - * but control the GPIO from some where else than this driver. * For that to work we should unset the is_enabled callback * here. * * I believe such case where rohm,vout1-en-low is set and * vout1-en-gpios is not is likely to be a misconfiguration. * So let's just err out for now. */ if (!IS_ERR(en)) config.ena_gpiod = en; else return dev_err_probe(&pdev->dev, PTR_ERR(en), "Failed to get VOUT1 control GPIO\n"); } /* * If more than one PMIC needs to be controlled by same processor then * allocate the regulator data array here and use bd9576_regulators as * template. At the moment I see no such use-case so I spare some * bytes and use bd9576_regulators directly for non-constant configs * like DDR voltage selection. */ platform_set_drvdata(pdev, ic_data); ddr_sel = device_property_read_bool(pdev->dev.parent, "rohm,ddr-sel-low"); if (ddr_sel) ic_data->regulator_data[2].desc.fixed_uV = 1350000; else ic_data->regulator_data[2].desc.fixed_uV = 1500000; switch (chip) { case ROHM_CHIP_TYPE_BD9576: may_have_irqs = true; dev_dbg(&pdev->dev, "Found BD9576MUF\n"); break; case ROHM_CHIP_TYPE_BD9573: dev_dbg(&pdev->dev, "Found BD9573MUF\n"); break; default: dev_err(&pdev->dev, "Unsupported chip type\n"); return -EINVAL; } for (i = 0; i < num_reg_data; i++) { struct regulator_desc *d; d = &ic_data->regulator_data[i].desc; if (may_have_irqs) { if (d->id >= ARRAY_SIZE(bd9576_ops_arr)) return -EINVAL; d->ops = bd9576_ops_arr[d->id]; } else { if (d->id >= ARRAY_SIZE(bd9573_ops_arr)) return -EINVAL; d->ops = bd9573_ops_arr[d->id]; } } config.dev = pdev->dev.parent; config.regmap = regmap; config.driver_data = ic_data; for (i = 0; i < num_reg_data; i++) { struct bd957x_regulator_data *r = &ic_data->regulator_data[i]; const struct regulator_desc *desc = &r->desc; r->rdev = devm_regulator_register(&pdev->dev, desc, &config); if (IS_ERR(r->rdev)) return dev_err_probe(&pdev->dev, PTR_ERR(r->rdev), "failed to register %s regulator\n", desc->name); /* * Clear the VOUT1 GPIO setting - rest of the regulators do not * support GPIO control */ config.ena_gpiod = NULL; if (!may_have_irqs) continue; rdevs[i] = r->rdev; if (i < BD957X_VOUTS1) ovd_devs[i] = r->rdev; } if (may_have_irqs) { void *ret; /* * We can add both the possible error and warning flags here * because the core uses these only for status clearing and * if we use warnings - errors are always clear and the other * way around. We can also add CURRENT flag for all regulators * because it is never set if it is not supported. Same applies * to setting UVD for VoutS1 - it is not accidentally cleared * as it is never set. */ int uvd_errs = REGULATOR_ERROR_UNDER_VOLTAGE | REGULATOR_ERROR_UNDER_VOLTAGE_WARN | REGULATOR_ERROR_OVER_CURRENT | REGULATOR_ERROR_OVER_CURRENT_WARN; int ovd_errs = REGULATOR_ERROR_OVER_VOLTAGE_WARN | REGULATOR_ERROR_REGULATION_OUT; int temp_errs = REGULATOR_ERROR_OVER_TEMP | REGULATOR_ERROR_OVER_TEMP_WARN; int irq; irq = platform_get_irq_byname(pdev, "bd9576-uvd"); /* Register notifiers - can fail if IRQ is not given */ ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_uvd, irq, 0, uvd_errs, NULL, &rdevs[0], BD9576_NUM_REGULATORS); if (IS_ERR(ret)) { if (PTR_ERR(ret) == -EPROBE_DEFER) return -EPROBE_DEFER; dev_warn(&pdev->dev, "UVD disabled %pe\n", ret); } irq = platform_get_irq_byname(pdev, "bd9576-ovd"); ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_ovd, irq, 0, ovd_errs, NULL, &ovd_devs[0], BD9576_NUM_OVD_REGULATORS); if (IS_ERR(ret)) { if (PTR_ERR(ret) == -EPROBE_DEFER) return -EPROBE_DEFER; dev_warn(&pdev->dev, "OVD disabled %pe\n", ret); } irq = platform_get_irq_byname(pdev, "bd9576-temp"); ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_temp, irq, 0, temp_errs, NULL, &rdevs[0], BD9576_NUM_REGULATORS); if (IS_ERR(ret)) { if (PTR_ERR(ret) == -EPROBE_DEFER) return -EPROBE_DEFER; dev_warn(&pdev->dev, "Thermal warning disabled %pe\n", ret); } } return 0; } static const struct platform_device_id bd957x_pmic_id[] = { { "bd9573-regulator", ROHM_CHIP_TYPE_BD9573 }, { "bd9576-regulator", ROHM_CHIP_TYPE_BD9576 }, { }, }; MODULE_DEVICE_TABLE(platform, bd957x_pmic_id); static struct platform_driver bd957x_regulator = { .driver = { .name = "bd957x-pmic", .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe = bd957x_probe, .id_table = bd957x_pmic_id, }; module_platform_driver(bd957x_regulator); MODULE_AUTHOR("Matti Vaittinen "); MODULE_DESCRIPTION("ROHM BD9576/BD9573 voltage regulator driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:bd957x-pmic");