diff options
Diffstat (limited to 'drivers/regulator/bd9576-regulator.c')
| -rw-r--r-- | drivers/regulator/bd9576-regulator.c | 1143 |
1 files changed, 1143 insertions, 0 deletions
diff --git a/drivers/regulator/bd9576-regulator.c b/drivers/regulator/bd9576-regulator.c new file mode 100644 index 000000000..393c8693b --- /dev/null +++ b/drivers/regulator/bd9576-regulator.c @@ -0,0 +1,1143 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2020 ROHM Semiconductors +// ROHM BD9576MUF/BD9573MUF regulator driver + +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/interrupt.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> +#include <linux/mfd/rohm-bd957x.h> +#include <linux/mfd/rohm-generic.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/workqueue.h> + +#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 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 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 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 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"); + if (!IS_ERR(en)) { + /* VOUT1_OPS gpio ctrl */ + /* + * Regulator core prioritizes the ena_gpio over + * enable/disable/is_enabled callbacks so no need to + * clear them. We can still use same ops + */ + config.ena_gpiod = en; + } else { + /* + * 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. + */ + dev_err(&pdev->dev, + "Failed to get VOUT1 control GPIO\n"); + return PTR_ERR(en); + } + } + + /* + * 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)) { + dev_err(&pdev->dev, + "failed to register %s regulator\n", + desc->name); + return PTR_ERR(r->rdev); + } + /* + * 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 = bd957x_probe, + .id_table = bd957x_pmic_id, +}; + +module_platform_driver(bd957x_regulator); + +MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); +MODULE_DESCRIPTION("ROHM BD9576/BD9573 voltage regulator driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:bd957x-pmic"); |