// SPDX-License-Identifier: GPL-2.0-only // // DA9121 Single-channel dual-phase 10A buck converter // // Copyright (C) 2020 Axis Communications AB // // DA9130 Single-channel dual-phase 10A buck converter (Automotive) // DA9217 Single-channel dual-phase 6A buck converter // DA9122 Dual-channel single-phase 5A buck converter // DA9131 Dual-channel single-phase 5A buck converter (Automotive) // DA9220 Dual-channel single-phase 3A buck converter // DA9132 Dual-channel single-phase 3A buck converter (Automotive) // // Copyright (C) 2020 Dialog Semiconductor #include #include #include #include #include #include #include #include #include #include #include #include #include #include "da9121-regulator.h" /* Chip data */ struct da9121 { struct device *dev; struct delayed_work work; struct da9121_pdata *pdata; struct regmap *regmap; struct regulator_dev *rdev[DA9121_IDX_MAX]; unsigned int persistent[2]; unsigned int passive_delay; int chip_irq; int variant_id; int subvariant_id; }; /* Define ranges for different variants, enabling translation to/from * registers. Maximums give scope to allow for transients. */ struct da9121_range { int val_min; int val_max; int val_stp; int reg_min; int reg_max; }; static struct da9121_range da9121_10A_2phase_current = { .val_min = 7000000, .val_max = 20000000, .val_stp = 1000000, .reg_min = 1, .reg_max = 14, }; static struct da9121_range da9121_6A_2phase_current = { .val_min = 7000000, .val_max = 12000000, .val_stp = 1000000, .reg_min = 1, .reg_max = 6, }; static struct da9121_range da9121_5A_1phase_current = { .val_min = 3500000, .val_max = 10000000, .val_stp = 500000, .reg_min = 1, .reg_max = 14, }; static struct da9121_range da9121_3A_1phase_current = { .val_min = 3500000, .val_max = 6000000, .val_stp = 500000, .reg_min = 1, .reg_max = 6, }; static struct da9121_range da914x_40A_4phase_current = { .val_min = 26000000, .val_max = 78000000, .val_stp = 4000000, .reg_min = 1, .reg_max = 14, }; static struct da9121_range da914x_20A_2phase_current = { .val_min = 13000000, .val_max = 39000000, .val_stp = 2000000, .reg_min = 1, .reg_max = 14, }; struct da9121_variant_info { int num_bucks; int num_phases; struct da9121_range *current_range; }; static const struct da9121_variant_info variant_parameters[] = { { 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130 { 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132 { 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131 { 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217 { 1, 4, &da914x_40A_4phase_current }, //DA9121_TYPE_DA9141 { 1, 2, &da914x_20A_2phase_current }, //DA9121_TYPE_DA9142 }; struct da9121_field { unsigned int reg; unsigned int msk; }; static const struct da9121_field da9121_current_field[2] = { { DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM }, { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM }, }; static const struct da9121_field da9121_mode_field[2] = { { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE }, { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE }, }; struct status_event_data { int buck_id; /* 0=core, 1/2-buck */ int reg_index; /* index for status/event/mask register selection */ int status_bit; /* bit masks... */ int event_bit; int mask_bit; unsigned long notification; /* Notification for status inception */ char *warn; /* if NULL, notify - otherwise dev_warn this string */ }; #define DA9121_STATUS(id, bank, name, notification, warning) \ { id, bank, \ DA9121_MASK_SYS_STATUS_##bank##_##name, \ DA9121_MASK_SYS_EVENT_##bank##_E_##name, \ DA9121_MASK_SYS_MASK_##bank##_M_##name, \ notification, warning } /* For second buck related event bits that are specific to DA9122, DA9220 variants */ #define DA9xxx_STATUS(id, bank, name, notification, warning) \ { id, bank, \ DA9xxx_MASK_SYS_STATUS_##bank##_##name, \ DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \ DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \ notification, warning } /* The status signals that may need servicing, depending on device variant. * After assertion, they persist; so event is notified, the IRQ disabled, * and status polled until clear again and IRQ is reenabled. * * SG/PG1/PG2 should be set when device first powers up and should never * re-occur. When this driver starts, it is expected that these will have * self-cleared for when the IRQs are enabled, so these should never be seen. * If seen, the implication is that the device has reset. * * GPIO0/1/2 are not configured for use by default, so should not be seen. */ static const struct status_event_data status_event_handling[] = { DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"), DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL), DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL), DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"), DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL), DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL), DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL), DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"), DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL), DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL), DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL), DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"), DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"), DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"), }; static int da9121_get_current_limit(struct regulator_dev *rdev) { struct da9121 *chip = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); struct da9121_range *range = variant_parameters[chip->variant_id].current_range; unsigned int val = 0; int ret = 0; ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val); if (ret < 0) { dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret); goto error; } if (val < range->reg_min) { ret = -EACCES; goto error; } if (val > range->reg_max) { ret = -EINVAL; goto error; } return range->val_min + (range->val_stp * (val - range->reg_min)); error: return ret; } static int da9121_ceiling_selector(struct regulator_dev *rdev, int min, int max, unsigned int *selector) { struct da9121 *chip = rdev_get_drvdata(rdev); struct da9121_range *range = variant_parameters[chip->variant_id].current_range; unsigned int level; unsigned int i = 0; unsigned int sel = 0; int ret = 0; if (range->val_min > max || range->val_max < min) { dev_err(chip->dev, "Requested current out of regulator capability\n"); ret = -EINVAL; goto error; } level = range->val_max; for (i = range->reg_max; i >= range->reg_min; i--) { if (level <= max) { sel = i; break; } level -= range->val_stp; } if (level < min) { dev_err(chip->dev, "Best match falls below minimum requested current\n"); ret = -EINVAL; goto error; } *selector = sel; error: return ret; } static int da9121_set_current_limit(struct regulator_dev *rdev, int min_ua, int max_ua) { struct da9121 *chip = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); struct da9121_range *range = variant_parameters[chip->variant_id].current_range; unsigned int sel = 0; int ret = 0; if (min_ua < range->val_min || max_ua > range->val_max) { ret = -EINVAL; goto error; } if (rdev->desc->ops->is_enabled(rdev)) { ret = -EBUSY; goto error; } ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel); if (ret < 0) goto error; ret = regmap_update_bits(chip->regmap, da9121_current_field[id].reg, da9121_current_field[id].msk, (unsigned int)sel); if (ret < 0) dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret); error: return ret; } static unsigned int da9121_map_mode(unsigned int mode) { switch (mode) { case DA9121_BUCK_MODE_FORCE_PWM: return REGULATOR_MODE_FAST; case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING: return REGULATOR_MODE_NORMAL; case DA9121_BUCK_MODE_AUTO: return REGULATOR_MODE_IDLE; case DA9121_BUCK_MODE_FORCE_PFM: return REGULATOR_MODE_STANDBY; default: return REGULATOR_MODE_INVALID; } } static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct da9121 *chip = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); unsigned int val; switch (mode) { case REGULATOR_MODE_FAST: val = DA9121_BUCK_MODE_FORCE_PWM; break; case REGULATOR_MODE_NORMAL: val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING; break; case REGULATOR_MODE_IDLE: val = DA9121_BUCK_MODE_AUTO; break; case REGULATOR_MODE_STANDBY: val = DA9121_BUCK_MODE_FORCE_PFM; break; default: return -EINVAL; } return regmap_update_bits(chip->regmap, da9121_mode_field[id].reg, da9121_mode_field[id].msk, val); } static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev) { struct da9121 *chip = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); unsigned int val, mode; int ret = 0; ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val); if (ret < 0) { dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret); return -EINVAL; } mode = da9121_map_mode(val & da9121_mode_field[id].msk); if (mode == REGULATOR_MODE_INVALID) return -EINVAL; return mode; } static const struct regulator_ops da9121_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, .get_current_limit = da9121_get_current_limit, .set_current_limit = da9121_set_current_limit, .set_mode = da9121_buck_set_mode, .get_mode = da9121_buck_get_mode, }; static struct of_regulator_match da9121_matches[] = { [DA9121_IDX_BUCK1] = { .name = "buck1" }, [DA9121_IDX_BUCK2] = { .name = "buck2" }, }; static int da9121_of_parse_cb(struct device_node *np, const struct regulator_desc *desc, struct regulator_config *config) { struct da9121 *chip = config->driver_data; struct da9121_pdata *pdata; struct gpio_desc *ena_gpiod; if (chip->pdata == NULL) { pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; } else { pdata = chip->pdata; } pdata->num_buck++; if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) { dev_err(chip->dev, "Error: excessive regulators for device\n"); return -ENODEV; } ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0, GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE, "da9121-enable"); if (!IS_ERR(ena_gpiod)) config->ena_gpiod = ena_gpiod; if (variant_parameters[chip->variant_id].num_bucks == 2) { uint32_t ripple_cancel; uint32_t ripple_reg; int ret; if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node, "dlg,ripple-cancel", &ripple_cancel)) { if (pdata->num_buck > 1) ripple_reg = DA9xxx_REG_BUCK_BUCK2_7; else ripple_reg = DA9121_REG_BUCK_BUCK1_7; ret = regmap_update_bits(chip->regmap, ripple_reg, DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL, ripple_cancel); if (ret < 0) dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret); } } return 0; } #define DA9121_MIN_MV 300 #define DA9121_MAX_MV 1900 #define DA9121_STEP_MV 10 #define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV) #define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \ + 1 + DA9121_MIN_SEL) static const struct regulator_desc da9121_reg = { .id = DA9121_IDX_BUCK1, .name = "da9121", .of_match = "buck1", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA9121_N_VOLTAGES, .min_uV = DA9121_MIN_MV * 1000, .uV_step = DA9121_STEP_MV * 1000, .linear_min_sel = DA9121_MIN_SEL, .vsel_reg = DA9121_REG_BUCK_BUCK1_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, .enable_reg = DA9121_REG_BUCK_BUCK1_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */ .ramp_delay = 20000, /* tBUCK_EN */ .enable_time = 20, }; static const struct regulator_desc da9220_reg[2] = { { .id = DA9121_IDX_BUCK1, .name = "DA9220/DA9132 BUCK1", .of_match = "buck1", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA9121_N_VOLTAGES, .min_uV = DA9121_MIN_MV * 1000, .uV_step = DA9121_STEP_MV * 1000, .linear_min_sel = DA9121_MIN_SEL, .enable_reg = DA9121_REG_BUCK_BUCK1_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, .vsel_reg = DA9121_REG_BUCK_BUCK1_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, }, { .id = DA9121_IDX_BUCK2, .name = "DA9220/DA9132 BUCK2", .of_match = "buck2", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA9121_N_VOLTAGES, .min_uV = DA9121_MIN_MV * 1000, .uV_step = DA9121_STEP_MV * 1000, .linear_min_sel = DA9121_MIN_SEL, .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, } }; static const struct regulator_desc da9122_reg[2] = { { .id = DA9121_IDX_BUCK1, .name = "DA9122/DA9131 BUCK1", .of_match = "buck1", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA9121_N_VOLTAGES, .min_uV = DA9121_MIN_MV * 1000, .uV_step = DA9121_STEP_MV * 1000, .linear_min_sel = DA9121_MIN_SEL, .enable_reg = DA9121_REG_BUCK_BUCK1_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, .vsel_reg = DA9121_REG_BUCK_BUCK1_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, }, { .id = DA9121_IDX_BUCK2, .name = "DA9122/DA9131 BUCK2", .of_match = "buck2", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA9121_N_VOLTAGES, .min_uV = DA9121_MIN_MV * 1000, .uV_step = DA9121_STEP_MV * 1000, .linear_min_sel = DA9121_MIN_SEL, .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, } }; static const struct regulator_desc da9217_reg = { .id = DA9121_IDX_BUCK1, .name = "DA9217 BUCK1", .of_match = "buck1", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA9121_N_VOLTAGES, .min_uV = DA9121_MIN_MV * 1000, .uV_step = DA9121_STEP_MV * 1000, .linear_min_sel = DA9121_MIN_SEL, .enable_reg = DA9121_REG_BUCK_BUCK1_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, .vsel_reg = DA9121_REG_BUCK_BUCK1_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, }; #define DA914X_MIN_MV 500 #define DA914X_MAX_MV 1000 #define DA914X_STEP_MV 10 #define DA914X_MIN_SEL (DA914X_MIN_MV / DA914X_STEP_MV) #define DA914X_N_VOLTAGES (((DA914X_MAX_MV - DA914X_MIN_MV) / DA914X_STEP_MV) \ + 1 + DA914X_MIN_SEL) static const struct regulator_desc da9141_reg = { .id = DA9121_IDX_BUCK1, .name = "DA9141", .of_match = "buck1", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA914X_N_VOLTAGES, .min_uV = DA914X_MIN_MV * 1000, .uV_step = DA914X_STEP_MV * 1000, .linear_min_sel = DA914X_MIN_SEL, .vsel_reg = DA9121_REG_BUCK_BUCK1_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, .enable_reg = DA9121_REG_BUCK_BUCK1_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */ .ramp_delay = 20000, /* tBUCK_EN */ .enable_time = 20, }; static const struct regulator_desc da9142_reg = { .id = DA9121_IDX_BUCK1, .name = "DA9142 BUCK1", .of_match = "buck1", .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .of_map_mode = da9121_map_mode, .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA914X_N_VOLTAGES, .min_uV = DA914X_MIN_MV * 1000, .uV_step = DA914X_STEP_MV * 1000, .linear_min_sel = DA914X_MIN_SEL, .enable_reg = DA9121_REG_BUCK_BUCK1_0, .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, .vsel_reg = DA9121_REG_BUCK_BUCK1_5, .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, }; static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = { [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL }, [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] }, [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] }, [DA9121_TYPE_DA9217] = { &da9217_reg, NULL }, [DA9121_TYPE_DA9141] = { &da9141_reg, NULL }, [DA9121_TYPE_DA9142] = { &da9142_reg, NULL }, }; static void da9121_status_poll_on(struct work_struct *work) { struct da9121 *chip = container_of(work, struct da9121, work.work); int status[3] = {0}; int clear[3] = {0}; unsigned long delay; int i; int ret; ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2); if (ret < 0) { dev_err(chip->dev, "Failed to read STATUS registers: %d\n", ret); goto error; } /* Possible events are tested to be within range for the variant, potentially * masked by the IRQ handler (not just warned about), as having been masked, * and the respective state cleared - then flagged to unmask for next IRQ. */ for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) { const struct status_event_data *item = &status_event_handling[i]; int reg_idx = item->reg_index; bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks); bool supported = (item->warn == NULL); bool persisting = (chip->persistent[reg_idx] & item->event_bit); bool now_cleared = !(status[reg_idx] & item->status_bit); if (relevant && supported && persisting && now_cleared) { clear[reg_idx] |= item->mask_bit; chip->persistent[reg_idx] &= ~item->event_bit; } } for (i = 0; i < 2; i++) { if (clear[i]) { unsigned int reg = DA9121_REG_SYS_MASK_0 + i; unsigned int mbit = clear[i]; ret = regmap_update_bits(chip->regmap, reg, mbit, 0); if (ret < 0) { dev_err(chip->dev, "Failed to unmask 0x%02x %d\n", reg, ret); goto error; } } } if (chip->persistent[0] | chip->persistent[1]) { delay = msecs_to_jiffies(chip->passive_delay); queue_delayed_work(system_freezable_wq, &chip->work, delay); } error: return; } static irqreturn_t da9121_irq_handler(int irq, void *data) { struct da9121 *chip = data; struct regulator_dev *rdev; int event[3] = {0}; int handled[3] = {0}; int mask[3] = {0}; int ret = IRQ_NONE; int i; int err; err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3); if (err < 0) { dev_err(chip->dev, "Failed to read EVENT registers %d\n", err); ret = IRQ_NONE; goto error; } err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3); if (err < 0) { dev_err(chip->dev, "Failed to read MASK registers: %d\n", ret); ret = IRQ_NONE; goto error; } rdev = chip->rdev[DA9121_IDX_BUCK1]; /* Possible events are tested to be within range for the variant, currently * enabled, and having triggered this IRQ. The event may then be notified, * or a warning given for unexpected events - those from device POR, and * currently unsupported GPIO configurations. */ for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) { const struct status_event_data *item = &status_event_handling[i]; int reg_idx = item->reg_index; bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks); bool enabled = !(mask[reg_idx] & item->mask_bit); bool active = (event[reg_idx] & item->event_bit); bool notify = (item->warn == NULL); if (relevant && enabled && active) { if (notify) { chip->persistent[reg_idx] |= item->event_bit; regulator_notifier_call_chain(rdev, item->notification, NULL); } else { dev_warn(chip->dev, item->warn); handled[reg_idx] |= item->event_bit; ret = IRQ_HANDLED; } } } for (i = 0; i < 3; i++) { if (event[i] != handled[i]) { dev_warn(chip->dev, "Unhandled event(s) in bank%d 0x%02x\n", i, event[i] ^ handled[i]); } } /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */ for (i = 0; i < 2; i++) { if (handled[i]) { unsigned int reg = DA9121_REG_SYS_MASK_0 + i; unsigned int mbit = handled[i]; err = regmap_update_bits(chip->regmap, reg, mbit, mbit); if (err < 0) { dev_err(chip->dev, "Failed to mask 0x%02x interrupt %d\n", reg, err); ret = IRQ_NONE; goto error; } } } /* clear the events */ if (handled[0] | handled[1] | handled[2]) { err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3); if (err < 0) { dev_err(chip->dev, "Fail to write EVENTs %d\n", err); ret = IRQ_NONE; goto error; } } queue_delayed_work(system_freezable_wq, &chip->work, 0); error: return ret; } static int da9121_set_regulator_config(struct da9121 *chip) { struct regulator_config config = { }; unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks; int ret = 0; int i; for (i = 0; i < max_matches; i++) { const struct regulator_desc *regl_desc = local_da9121_regulators[chip->variant_id][i]; config.dev = chip->dev; config.driver_data = chip; config.regmap = chip->regmap; chip->rdev[i] = devm_regulator_register(chip->dev, regl_desc, &config); if (IS_ERR(chip->rdev[i])) { dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n", regl_desc->name, (i+1), max_matches); ret = PTR_ERR(chip->rdev[i]); goto error; } } error: return ret; } /* DA9121 chip register model */ static const struct regmap_range da9121_1ch_readable_ranges[] = { regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3), regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6), regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID), }; static const struct regmap_access_table da9121_1ch_readable_table = { .yes_ranges = da9121_1ch_readable_ranges, .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges), }; static const struct regmap_range da9121_2ch_readable_ranges[] = { regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3), regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7), regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7), regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID), }; static const struct regmap_access_table da9121_2ch_readable_table = { .yes_ranges = da9121_2ch_readable_ranges, .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges), }; static const struct regmap_range da9121_1ch_writeable_ranges[] = { regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3), regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2), regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6), }; static const struct regmap_access_table da9121_1ch_writeable_table = { .yes_ranges = da9121_1ch_writeable_ranges, .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges), }; static const struct regmap_range da9121_2ch_writeable_ranges[] = { regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3), regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2), regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7), regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2), regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7), }; static const struct regmap_access_table da9121_2ch_writeable_table = { .yes_ranges = da9121_2ch_writeable_ranges, .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges), }; static const struct regmap_range da9121_volatile_ranges[] = { regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2), regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6), }; static const struct regmap_access_table da9121_volatile_table = { .yes_ranges = da9121_volatile_ranges, .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges), }; /* DA9121 regmap config for 1 channel variants */ static struct regmap_config da9121_1ch_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = DA9121_REG_OTP_CONFIG_ID, .rd_table = &da9121_1ch_readable_table, .wr_table = &da9121_1ch_writeable_table, .volatile_table = &da9121_volatile_table, .cache_type = REGCACHE_RBTREE, }; /* DA9121 regmap config for 2 channel variants */ static struct regmap_config da9121_2ch_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = DA9121_REG_OTP_CONFIG_ID, .rd_table = &da9121_2ch_readable_table, .wr_table = &da9121_2ch_writeable_table, .volatile_table = &da9121_volatile_table, .cache_type = REGCACHE_RBTREE, }; static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip) { u32 device_id; u32 variant_id; u8 variant_mrc, variant_vrc; char *type; bool config_match = false; int ret = 0; ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id); if (ret < 0) { dev_err(chip->dev, "Cannot read device ID: %d\n", ret); goto error; } ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id); if (ret < 0) { dev_err(chip->dev, "Cannot read variant ID: %d\n", ret); goto error; } if ((device_id != DA9121_DEVICE_ID) && (device_id != DA914x_DEVICE_ID)) { dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id); ret = -ENODEV; goto error; } variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC; switch (chip->subvariant_id) { case DA9121_SUBTYPE_DA9121: type = "DA9121"; config_match = (variant_vrc == DA9121_VARIANT_VRC); break; case DA9121_SUBTYPE_DA9130: type = "DA9130"; config_match = (variant_vrc == DA9130_VARIANT_VRC); break; case DA9121_SUBTYPE_DA9220: type = "DA9220"; config_match = (variant_vrc == DA9220_VARIANT_VRC); break; case DA9121_SUBTYPE_DA9132: type = "DA9132"; config_match = (variant_vrc == DA9132_VARIANT_VRC); break; case DA9121_SUBTYPE_DA9122: type = "DA9122"; config_match = (variant_vrc == DA9122_VARIANT_VRC); break; case DA9121_SUBTYPE_DA9131: type = "DA9131"; config_match = (variant_vrc == DA9131_VARIANT_VRC); break; case DA9121_SUBTYPE_DA9217: type = "DA9217"; config_match = (variant_vrc == DA9217_VARIANT_VRC); break; default: type = "Unknown"; break; } if (device_id == DA914x_DEVICE_ID) { switch (chip->subvariant_id) { case DA9121_SUBTYPE_DA9141: type = "DA9141"; config_match = (variant_vrc == DA9141_VARIANT_VRC); break; case DA9121_SUBTYPE_DA9142: type = "DA9142"; config_match = (variant_vrc == DA9142_VARIANT_VRC); break; default: type = "Unknown"; break; } } dev_info(chip->dev, "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n", device_id, variant_id, type); if (!config_match) { dev_err(chip->dev, "Device tree configuration does not match detected device.\n"); ret = -EINVAL; goto error; } variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC) >> DA9121_SHIFT_OTP_VARIANT_ID_MRC; if (((device_id == DA9121_DEVICE_ID) && (variant_mrc < DA9121_VARIANT_MRC_BASE)) || ((device_id == DA914x_DEVICE_ID) && (variant_mrc != DA914x_VARIANT_MRC_BASE))) { dev_err(chip->dev, "Cannot support variant MRC: 0x%02X\n", variant_mrc); ret = -EINVAL; } error: return ret; } static int da9121_assign_chip_model(struct i2c_client *i2c, struct da9121 *chip) { struct regmap_config *regmap; int ret = 0; chip->dev = &i2c->dev; /* Use configured subtype to select the regulator descriptor index and * register map, common to both consumer and automotive grade variants */ switch (chip->subvariant_id) { case DA9121_SUBTYPE_DA9121: case DA9121_SUBTYPE_DA9130: chip->variant_id = DA9121_TYPE_DA9121_DA9130; regmap = &da9121_1ch_regmap_config; break; case DA9121_SUBTYPE_DA9217: chip->variant_id = DA9121_TYPE_DA9217; regmap = &da9121_1ch_regmap_config; break; case DA9121_SUBTYPE_DA9122: case DA9121_SUBTYPE_DA9131: chip->variant_id = DA9121_TYPE_DA9122_DA9131; regmap = &da9121_2ch_regmap_config; break; case DA9121_SUBTYPE_DA9220: case DA9121_SUBTYPE_DA9132: chip->variant_id = DA9121_TYPE_DA9220_DA9132; regmap = &da9121_2ch_regmap_config; break; case DA9121_SUBTYPE_DA9141: chip->variant_id = DA9121_TYPE_DA9141; regmap = &da9121_1ch_regmap_config; break; case DA9121_SUBTYPE_DA9142: chip->variant_id = DA9121_TYPE_DA9142; regmap = &da9121_2ch_regmap_config; break; } /* Set these up for of_regulator_match call which may want .of_map_modes */ da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0]; da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1]; chip->regmap = devm_regmap_init_i2c(i2c, regmap); if (IS_ERR(chip->regmap)) { ret = PTR_ERR(chip->regmap); dev_err(chip->dev, "Failed to configure a register map: %d\n", ret); return ret; } ret = da9121_check_device_type(i2c, chip); return ret; } static int da9121_config_irq(struct i2c_client *i2c, struct da9121 *chip) { unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS; const int mask_all[4] = { 0, 0, 0xFF, 0xFF }; int ret = 0; chip->chip_irq = i2c->irq; if (chip->chip_irq != 0) { if (!of_property_read_u32(chip->dev->of_node, "dlg,irq-polling-delay-passive-ms", &p_delay)) { if (p_delay < DA9121_MIN_POLLING_PERIOD_MS || p_delay > DA9121_MAX_POLLING_PERIOD_MS) { dev_warn(chip->dev, "Out-of-range polling period %d ms\n", p_delay); p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS; } } chip->passive_delay = p_delay; ret = request_threaded_irq(chip->chip_irq, NULL, da9121_irq_handler, IRQF_TRIGGER_LOW|IRQF_ONESHOT, "da9121", chip); if (ret != 0) { dev_err(chip->dev, "Failed IRQ request: %d\n", chip->chip_irq); goto error; } ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); if (ret != 0) { dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret); goto regmap_error; } INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on); dev_info(chip->dev, "Interrupt polling period set at %d ms\n", chip->passive_delay); } error: return ret; regmap_error: free_irq(chip->chip_irq, chip); return ret; } static const struct of_device_id da9121_dt_ids[] = { { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 }, { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 }, { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 }, { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 }, { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 }, { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 }, { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 }, { .compatible = "dlg,da9141", .data = (void *) DA9121_SUBTYPE_DA9141 }, { .compatible = "dlg,da9142", .data = (void *) DA9121_SUBTYPE_DA9142 }, { } }; MODULE_DEVICE_TABLE(of, da9121_dt_ids); static inline int da9121_of_get_id(struct device *dev) { const struct of_device_id *id = of_match_device(da9121_dt_ids, dev); if (!id) { dev_err(dev, "%s: Failed\n", __func__); return -EINVAL; } return (uintptr_t)id->data; } static int da9121_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct da9121 *chip; const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF }; int ret = 0; chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL); if (!chip) { ret = -ENOMEM; goto error; } chip->pdata = i2c->dev.platform_data; chip->subvariant_id = da9121_of_get_id(&i2c->dev); ret = da9121_assign_chip_model(i2c, chip); if (ret < 0) goto error; ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); if (ret != 0) { dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret); goto error; } ret = da9121_set_regulator_config(chip); if (ret < 0) goto error; ret = da9121_config_irq(i2c, chip); error: return ret; } static int da9121_i2c_remove(struct i2c_client *i2c) { struct da9121 *chip = i2c_get_clientdata(i2c); const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF }; int ret; free_irq(chip->chip_irq, chip); cancel_delayed_work_sync(&chip->work); ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); if (ret != 0) dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret); return 0; } static const struct i2c_device_id da9121_i2c_id[] = { {"da9121", DA9121_TYPE_DA9121_DA9130}, {"da9130", DA9121_TYPE_DA9121_DA9130}, {"da9217", DA9121_TYPE_DA9217}, {"da9122", DA9121_TYPE_DA9122_DA9131}, {"da9131", DA9121_TYPE_DA9122_DA9131}, {"da9220", DA9121_TYPE_DA9220_DA9132}, {"da9132", DA9121_TYPE_DA9220_DA9132}, {"da9141", DA9121_TYPE_DA9141}, {"da9142", DA9121_TYPE_DA9142}, {}, }; MODULE_DEVICE_TABLE(i2c, da9121_i2c_id); static struct i2c_driver da9121_regulator_driver = { .driver = { .name = "da9121", .of_match_table = of_match_ptr(da9121_dt_ids), }, .probe = da9121_i2c_probe, .remove = da9121_i2c_remove, .id_table = da9121_i2c_id, }; module_i2c_driver(da9121_regulator_driver); MODULE_LICENSE("GPL v2");