diff options
Diffstat (limited to 'drivers/regulator/da9063-regulator.c')
| -rw-r--r-- | drivers/regulator/da9063-regulator.c | 1090 |
1 files changed, 1090 insertions, 0 deletions
diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c new file mode 100644 index 0000000000..a0621665a6 --- /dev/null +++ b/drivers/regulator/da9063-regulator.c @@ -0,0 +1,1090 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Regulator driver for DA9063 PMIC series +// +// Copyright 2012 Dialog Semiconductors Ltd. +// Copyright 2013 Philipp Zabel, Pengutronix +// +// Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com> + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> +#include <linux/mfd/da9063/core.h> +#include <linux/mfd/da9063/registers.h> + + +/* Definition for registering regmap bit fields using a mask */ +#define BFIELD(_reg, _mask) \ + REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \ + sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1) + +/* DA9063 and DA9063L regulator IDs */ +enum { + /* BUCKs */ + DA9063_ID_BCORE1, + DA9063_ID_BCORE2, + DA9063_ID_BPRO, + DA9063_ID_BMEM, + DA9063_ID_BIO, + DA9063_ID_BPERI, + + /* BCORE1 and BCORE2 in merged mode */ + DA9063_ID_BCORES_MERGED, + /* BMEM and BIO in merged mode */ + DA9063_ID_BMEM_BIO_MERGED, + /* When two BUCKs are merged, they cannot be reused separately */ + + /* LDOs on both DA9063 and DA9063L */ + DA9063_ID_LDO3, + DA9063_ID_LDO7, + DA9063_ID_LDO8, + DA9063_ID_LDO9, + DA9063_ID_LDO11, + + /* DA9063-only LDOs */ + DA9063_ID_LDO1, + DA9063_ID_LDO2, + DA9063_ID_LDO4, + DA9063_ID_LDO5, + DA9063_ID_LDO6, + DA9063_ID_LDO10, +}; + +/* Old regulator platform data */ +struct da9063_regulator_data { + int id; + struct regulator_init_data *initdata; +}; + +struct da9063_regulators_pdata { + unsigned int n_regulators; + struct da9063_regulator_data *regulator_data; +}; + +/* Regulator capabilities and registers description */ +struct da9063_regulator_info { + struct regulator_desc desc; + + /* DA9063 main register fields */ + struct reg_field mode; /* buck mode of operation */ + struct reg_field suspend; + struct reg_field sleep; + struct reg_field suspend_sleep; + unsigned int suspend_vsel_reg; + + /* DA9063 event detection bit */ + struct reg_field oc_event; + + /* DA9063 voltage monitor bit */ + struct reg_field vmon; +}; + +/* Macros for LDO */ +#define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \ + .desc.id = chip##_ID_##regl_name, \ + .desc.name = __stringify(chip##_##regl_name), \ + .desc.ops = &da9063_ldo_ops, \ + .desc.min_uV = (min_mV) * 1000, \ + .desc.uV_step = (step_mV) * 1000, \ + .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \ + + (DA9063_V##regl_name##_BIAS)), \ + .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \ + .desc.enable_mask = DA9063_LDO_EN, \ + .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \ + .desc.vsel_mask = DA9063_V##regl_name##_MASK, \ + .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \ + .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \ + .suspend = BFIELD(DA9063_REG_##regl_name##_CONT, DA9063_LDO_CONF), \ + .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \ + .suspend_vsel_reg = DA9063_REG_V##regl_name##_B + +/* Macros for voltage DC/DC converters (BUCKs) */ +#define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array, \ + creg, cmask) \ + .desc.id = chip##_ID_##regl_name, \ + .desc.name = __stringify(chip##_##regl_name), \ + .desc.ops = &da9063_buck_ops, \ + .desc.min_uV = (min_mV) * 1000, \ + .desc.uV_step = (step_mV) * 1000, \ + .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \ + .desc.csel_reg = (creg), \ + .desc.csel_mask = (cmask), \ + .desc.curr_table = limits_array, \ + .desc.n_current_limits = ARRAY_SIZE(limits_array) + +#define DA9063_BUCK_COMMON_FIELDS(regl_name) \ + .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \ + .desc.enable_mask = DA9063_BUCK_EN, \ + .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \ + .desc.vsel_mask = DA9063_VBUCK_MASK, \ + .desc.linear_min_sel = DA9063_VBUCK_BIAS, \ + .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \ + .suspend = BFIELD(DA9063_REG_##regl_name##_CONT, DA9063_BUCK_CONF), \ + .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \ + .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \ + .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK) + +/* Defines asignment of regulators info table to chip model */ +struct da9063_dev_model { + const struct da9063_regulator_info *regulator_info; + unsigned int n_regulators; + enum da9063_type type; +}; + +/* Single regulator settings */ +struct da9063_regulator { + struct regulator_desc desc; + struct regulator_dev *rdev; + struct da9063 *hw; + const struct da9063_regulator_info *info; + + struct regmap_field *mode; + struct regmap_field *suspend; + struct regmap_field *sleep; + struct regmap_field *suspend_sleep; + struct regmap_field *vmon; +}; + +/* Encapsulates all information for the regulators driver */ +struct da9063_regulators { + unsigned int n_regulators; + /* Array size to be defined during init. Keep at end. */ + struct da9063_regulator regulator[]; +}; + +/* BUCK modes for DA9063 */ +enum { + BUCK_MODE_MANUAL, /* 0 */ + BUCK_MODE_SLEEP, /* 1 */ + BUCK_MODE_SYNC, /* 2 */ + BUCK_MODE_AUTO /* 3 */ +}; + +/* Regulator operations */ + +/* + * Current limits array (in uA) for BCORE1, BCORE2, BPRO. + * Entry indexes corresponds to register values. + */ +static const unsigned int da9063_buck_a_limits[] = { + 500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1200000, + 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000 +}; + +/* + * Current limits array (in uA) for BMEM, BIO, BPERI. + * Entry indexes corresponds to register values. + */ +static const unsigned int da9063_buck_b_limits[] = { + 1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000, + 2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000 +}; + +/* + * Current limits array (in uA) for merged BCORE1 and BCORE2. + * Entry indexes corresponds to register values. + */ +static const unsigned int da9063_bcores_merged_limits[] = { + 1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000, + 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000 +}; + +/* + * Current limits array (in uA) for merged BMEM and BIO. + * Entry indexes corresponds to register values. + */ +static const unsigned int da9063_bmem_bio_merged_limits[] = { + 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000, + 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000 +}; + +static int da9063_set_xvp(struct regulator_dev *rdev, int lim_uV, int severity, bool enable) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + struct device *dev = regl->hw->dev; + + dev_dbg(dev, "%s: lim: %d, sev: %d, en: %d\n", regl->desc.name, lim_uV, severity, enable); + + /* + * only support enable and disable. + * the da9063 offers a GPIO (GP_FB2) which is unasserted if an XV happens. + * therefore ignore severity here, as there might be handlers in hardware. + */ + if (lim_uV) + return -EINVAL; + + return regmap_field_write(regl->vmon, enable ? 1 : 0); +} + +static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + unsigned int val; + + switch (mode) { + case REGULATOR_MODE_FAST: + val = BUCK_MODE_SYNC; + break; + case REGULATOR_MODE_NORMAL: + val = BUCK_MODE_AUTO; + break; + case REGULATOR_MODE_STANDBY: + val = BUCK_MODE_SLEEP; + break; + default: + return -EINVAL; + } + + return regmap_field_write(regl->mode, val); +} + +/* + * Bucks use single mode register field for normal operation + * and suspend state. + * There are 3 modes to map to: FAST, NORMAL, and STANDBY. + */ + +static unsigned int da9063_buck_get_mode(struct regulator_dev *rdev) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + unsigned int val; + int ret; + + ret = regmap_field_read(regl->mode, &val); + if (ret < 0) + return ret; + + switch (val) { + default: + case BUCK_MODE_MANUAL: + /* Sleep flag bit decides the mode */ + break; + case BUCK_MODE_SLEEP: + return REGULATOR_MODE_STANDBY; + case BUCK_MODE_SYNC: + return REGULATOR_MODE_FAST; + case BUCK_MODE_AUTO: + return REGULATOR_MODE_NORMAL; + } + + ret = regmap_field_read(regl->sleep, &val); + if (ret < 0) + return 0; + + if (val) + return REGULATOR_MODE_STANDBY; + else + return REGULATOR_MODE_FAST; +} + +/* + * LDOs use sleep flags - one for normal and one for suspend state. + * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state. + */ + +static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + unsigned int val; + + switch (mode) { + case REGULATOR_MODE_NORMAL: + val = 0; + break; + case REGULATOR_MODE_STANDBY: + val = 1; + break; + default: + return -EINVAL; + } + + return regmap_field_write(regl->sleep, val); +} + +static unsigned int da9063_ldo_get_mode(struct regulator_dev *rdev) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + int ret, val; + + ret = regmap_field_read(regl->sleep, &val); + if (ret < 0) + return 0; + + if (val) + return REGULATOR_MODE_STANDBY; + else + return REGULATOR_MODE_NORMAL; +} + +static int da9063_buck_get_status(struct regulator_dev *rdev) +{ + int ret = regulator_is_enabled_regmap(rdev); + + if (ret == 0) { + ret = REGULATOR_STATUS_OFF; + } else if (ret > 0) { + ret = da9063_buck_get_mode(rdev); + if (ret > 0) + ret = regulator_mode_to_status(ret); + else if (ret == 0) + ret = -EIO; + } + + return ret; +} + +static int da9063_ldo_get_status(struct regulator_dev *rdev) +{ + int ret = regulator_is_enabled_regmap(rdev); + + if (ret == 0) { + ret = REGULATOR_STATUS_OFF; + } else if (ret > 0) { + ret = da9063_ldo_get_mode(rdev); + if (ret > 0) + ret = regulator_mode_to_status(ret); + else if (ret == 0) + ret = -EIO; + } + + return ret; +} + +static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + const struct da9063_regulator_info *rinfo = regl->info; + int ret, sel; + + sel = regulator_map_voltage_linear(rdev, uV, uV); + if (sel < 0) + return sel; + + sel <<= ffs(rdev->desc->vsel_mask) - 1; + + ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg, + rdev->desc->vsel_mask, sel); + + return ret; +} + +static int da9063_suspend_enable(struct regulator_dev *rdev) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + + return regmap_field_write(regl->suspend, 1); +} + +static int da9063_suspend_disable(struct regulator_dev *rdev) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + + return regmap_field_write(regl->suspend, 0); +} + +static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + int val; + + switch (mode) { + case REGULATOR_MODE_FAST: + val = BUCK_MODE_SYNC; + break; + case REGULATOR_MODE_NORMAL: + val = BUCK_MODE_AUTO; + break; + case REGULATOR_MODE_STANDBY: + val = BUCK_MODE_SLEEP; + break; + default: + return -EINVAL; + } + + return regmap_field_write(regl->mode, val); +} + +static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + unsigned int val; + + switch (mode) { + case REGULATOR_MODE_NORMAL: + val = 0; + break; + case REGULATOR_MODE_STANDBY: + val = 1; + break; + default: + return -EINVAL; + } + + return regmap_field_write(regl->suspend_sleep, val); +} + +static unsigned int da9063_get_overdrive_mask(const struct regulator_desc *desc) +{ + switch (desc->id) { + case DA9063_ID_BCORES_MERGED: + case DA9063_ID_BCORE1: + return DA9063_BCORE1_OD; + case DA9063_ID_BCORE2: + return DA9063_BCORE2_OD; + case DA9063_ID_BPRO: + return DA9063_BPRO_OD; + default: + return 0; + } +} + +static int da9063_buck_set_limit_set_overdrive(struct regulator_dev *rdev, + int min_uA, int max_uA, + unsigned int overdrive_mask) +{ + /* + * When enabling overdrive, do it before changing the current limit to + * ensure sufficient supply throughout the switch. + */ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + int ret; + unsigned int orig_overdrive; + + ret = regmap_read(regl->hw->regmap, DA9063_REG_CONFIG_H, + &orig_overdrive); + if (ret < 0) + return ret; + orig_overdrive &= overdrive_mask; + + if (orig_overdrive == 0) { + ret = regmap_set_bits(regl->hw->regmap, DA9063_REG_CONFIG_H, + overdrive_mask); + if (ret < 0) + return ret; + } + + ret = regulator_set_current_limit_regmap(rdev, min_uA / 2, max_uA / 2); + if (ret < 0 && orig_overdrive == 0) + /* + * regulator_set_current_limit_regmap may have rejected the + * change because of unusable min_uA and/or max_uA inputs. + * Attempt to restore original overdrive state, ignore failure- + * on-failure. + */ + regmap_clear_bits(regl->hw->regmap, DA9063_REG_CONFIG_H, + overdrive_mask); + + return ret; +} + +static int da9063_buck_set_limit_clear_overdrive(struct regulator_dev *rdev, + int min_uA, int max_uA, + unsigned int overdrive_mask) +{ + /* + * When disabling overdrive, do it after changing the current limit to + * ensure sufficient supply throughout the switch. + */ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + int ret, orig_limit; + + ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &orig_limit); + if (ret < 0) + return ret; + + ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA); + if (ret < 0) + return ret; + + ret = regmap_clear_bits(regl->hw->regmap, DA9063_REG_CONFIG_H, + overdrive_mask); + if (ret < 0) + /* + * Attempt to restore original current limit, ignore failure- + * on-failure. + */ + regmap_write(rdev->regmap, rdev->desc->csel_reg, orig_limit); + + return ret; +} + +static int da9063_buck_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + unsigned int overdrive_mask, n_currents; + + overdrive_mask = da9063_get_overdrive_mask(rdev->desc); + if (overdrive_mask) { + n_currents = rdev->desc->n_current_limits; + if (n_currents == 0) + return -EINVAL; + + if (max_uA > rdev->desc->curr_table[n_currents - 1]) + return da9063_buck_set_limit_set_overdrive(rdev, min_uA, + max_uA, + overdrive_mask); + + return da9063_buck_set_limit_clear_overdrive(rdev, min_uA, + max_uA, + overdrive_mask); + } + return regulator_set_current_limit_regmap(rdev, min_uA, max_uA); +} + +static int da9063_buck_get_current_limit(struct regulator_dev *rdev) +{ + struct da9063_regulator *regl = rdev_get_drvdata(rdev); + int val, ret, limit; + unsigned int mask; + + limit = regulator_get_current_limit_regmap(rdev); + if (limit < 0) + return limit; + mask = da9063_get_overdrive_mask(rdev->desc); + if (mask) { + ret = regmap_read(regl->hw->regmap, DA9063_REG_CONFIG_H, &val); + if (ret < 0) + return ret; + if (val & mask) + limit *= 2; + } + return limit; +} + +static const struct regulator_ops da9063_buck_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear, + .set_current_limit = da9063_buck_set_current_limit, + .get_current_limit = da9063_buck_get_current_limit, + .set_mode = da9063_buck_set_mode, + .get_mode = da9063_buck_get_mode, + .get_status = da9063_buck_get_status, + .set_suspend_voltage = da9063_set_suspend_voltage, + .set_suspend_enable = da9063_suspend_enable, + .set_suspend_disable = da9063_suspend_disable, + .set_suspend_mode = da9063_buck_set_suspend_mode, + .set_over_voltage_protection = da9063_set_xvp, + .set_under_voltage_protection = da9063_set_xvp, +}; + +static const struct regulator_ops da9063_ldo_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear, + .set_mode = da9063_ldo_set_mode, + .get_mode = da9063_ldo_get_mode, + .get_status = da9063_ldo_get_status, + .set_suspend_voltage = da9063_set_suspend_voltage, + .set_suspend_enable = da9063_suspend_enable, + .set_suspend_disable = da9063_suspend_disable, + .set_suspend_mode = da9063_ldo_set_suspend_mode, + .set_over_voltage_protection = da9063_set_xvp, + .set_under_voltage_protection = da9063_set_xvp, +}; + +/* Info of regulators for DA9063 */ +static const struct da9063_regulator_info da9063_regulator_info[] = { + { + DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570, + da9063_buck_a_limits, + DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK), + DA9063_BUCK_COMMON_FIELDS(BCORE1), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BCORE1_MON_EN), + }, + { + DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570, + da9063_buck_a_limits, + DA9063_REG_BUCK_ILIM_C, DA9063_BCORE2_ILIM_MASK), + DA9063_BUCK_COMMON_FIELDS(BCORE2), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BCORE2_MON_EN), + }, + { + DA9063_BUCK(DA9063, BPRO, 530, 10, 1800, + da9063_buck_a_limits, + DA9063_REG_BUCK_ILIM_B, DA9063_BPRO_ILIM_MASK), + DA9063_BUCK_COMMON_FIELDS(BPRO), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BPRO_MON_EN), + }, + { + DA9063_BUCK(DA9063, BMEM, 800, 20, 3340, + da9063_buck_b_limits, + DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK), + DA9063_BUCK_COMMON_FIELDS(BMEM), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BMEM_MON_EN), + }, + { + DA9063_BUCK(DA9063, BIO, 800, 20, 3340, + da9063_buck_b_limits, + DA9063_REG_BUCK_ILIM_A, DA9063_BIO_ILIM_MASK), + DA9063_BUCK_COMMON_FIELDS(BIO), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BIO_MON_EN), + }, + { + DA9063_BUCK(DA9063, BPERI, 800, 20, 3340, + da9063_buck_b_limits, + DA9063_REG_BUCK_ILIM_B, DA9063_BPERI_ILIM_MASK), + DA9063_BUCK_COMMON_FIELDS(BPERI), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BPERI_MON_EN), + }, + { + DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570, + da9063_bcores_merged_limits, + DA9063_REG_BUCK_ILIM_C, DA9063_BCORE1_ILIM_MASK), + /* BCORES_MERGED uses the same register fields as BCORE1 */ + DA9063_BUCK_COMMON_FIELDS(BCORE1), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BCORE1_MON_EN), + }, + { + DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340, + da9063_bmem_bio_merged_limits, + DA9063_REG_BUCK_ILIM_A, DA9063_BMEM_ILIM_MASK), + /* BMEM_BIO_MERGED uses the same register fields as BMEM */ + DA9063_BUCK_COMMON_FIELDS(BMEM), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_4, DA9063_BMEM_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO3, 900, 20, 3440), + .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO3_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO7, 900, 50, 3600), + .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO7_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO8, 900, 50, 3600), + .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO8_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO9, 950, 50, 3600), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_3, DA9063_LDO9_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO11, 900, 50, 3600), + .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_3, DA9063_LDO11_MON_EN), + }, + + /* The following LDOs are present only on DA9063, not on DA9063L */ + { + DA9063_LDO(DA9063, LDO1, 600, 20, 1860), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO1_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO2, 600, 20, 1860), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO2_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO4, 900, 20, 3440), + .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO4_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO5, 900, 50, 3600), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO5_MON_EN), + }, + { + DA9063_LDO(DA9063, LDO6, 900, 50, 3600), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_2, DA9063_LDO6_MON_EN), + }, + + { + DA9063_LDO(DA9063, LDO10, 900, 50, 3600), + .vmon = BFIELD(DA9063_BB_REG_MON_REG_3, DA9063_LDO10_MON_EN), + }, +}; + +/* Link chip model with regulators info table */ +static struct da9063_dev_model regulators_models[] = { + { + .regulator_info = da9063_regulator_info, + .n_regulators = ARRAY_SIZE(da9063_regulator_info), + .type = PMIC_TYPE_DA9063, + }, + { + .regulator_info = da9063_regulator_info, + .n_regulators = ARRAY_SIZE(da9063_regulator_info) - 6, + .type = PMIC_TYPE_DA9063L, + }, + { } +}; + +/* Regulator interrupt handlers */ +static irqreturn_t da9063_ldo_lim_event(int irq, void *data) +{ + struct da9063_regulators *regulators = data; + struct da9063 *hw = regulators->regulator[0].hw; + struct da9063_regulator *regl; + int bits, i, ret; + + ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits); + if (ret < 0) + return IRQ_NONE; + + for (i = regulators->n_regulators - 1; i >= 0; i--) { + regl = ®ulators->regulator[i]; + if (regl->info->oc_event.reg != DA9063_REG_STATUS_D) + continue; + + if (BIT(regl->info->oc_event.lsb) & bits) { + regulator_notifier_call_chain(regl->rdev, + REGULATOR_EVENT_OVER_CURRENT, NULL); + } + } + + return IRQ_HANDLED; +} + +/* + * Probing and Initialisation functions + */ +static const struct regulator_init_data *da9063_get_regulator_initdata( + const struct da9063_regulators_pdata *regl_pdata, int id) +{ + int i; + + for (i = 0; i < regl_pdata->n_regulators; i++) { + if (id == regl_pdata->regulator_data[i].id) + return regl_pdata->regulator_data[i].initdata; + } + + return NULL; +} + +static int da9063_check_xvp_constraints(struct regulator_config *config) +{ + struct da9063_regulator *regl = config->driver_data; + const struct regulation_constraints *constr = &config->init_data->constraints; + const struct notification_limit *uv_l = &constr->under_voltage_limits; + const struct notification_limit *ov_l = &constr->over_voltage_limits; + + /* make sure that only one severity is used to clarify if unchanged, enabled or disabled */ + if ((!!uv_l->prot + !!uv_l->err + !!uv_l->warn) > 1) { + dev_err(config->dev, "%s: at most one voltage monitoring severity allowed!\n", + regl->desc.name); + return -EINVAL; + } + + /* make sure that UV and OV monitoring is set to the same severity and value */ + if (uv_l->prot != ov_l->prot) { + dev_err(config->dev, + "%s: protection-microvolt: value must be equal for uv and ov!\n", + regl->desc.name); + return -EINVAL; + } + if (uv_l->err != ov_l->err) { + dev_err(config->dev, "%s: error-microvolt: value must be equal for uv and ov!\n", + regl->desc.name); + return -EINVAL; + } + if (uv_l->warn != ov_l->warn) { + dev_err(config->dev, "%s: warn-microvolt: value must be equal for uv and ov!\n", + regl->desc.name); + return -EINVAL; + } + + return 0; +} + +static struct of_regulator_match da9063_matches[] = { + [DA9063_ID_BCORE1] = { .name = "bcore1" }, + [DA9063_ID_BCORE2] = { .name = "bcore2" }, + [DA9063_ID_BPRO] = { .name = "bpro", }, + [DA9063_ID_BMEM] = { .name = "bmem", }, + [DA9063_ID_BIO] = { .name = "bio", }, + [DA9063_ID_BPERI] = { .name = "bperi", }, + [DA9063_ID_BCORES_MERGED] = { .name = "bcores-merged" }, + [DA9063_ID_BMEM_BIO_MERGED] = { .name = "bmem-bio-merged", }, + [DA9063_ID_LDO3] = { .name = "ldo3", }, + [DA9063_ID_LDO7] = { .name = "ldo7", }, + [DA9063_ID_LDO8] = { .name = "ldo8", }, + [DA9063_ID_LDO9] = { .name = "ldo9", }, + [DA9063_ID_LDO11] = { .name = "ldo11", }, + /* The following LDOs are present only on DA9063, not on DA9063L */ + [DA9063_ID_LDO1] = { .name = "ldo1", }, + [DA9063_ID_LDO2] = { .name = "ldo2", }, + [DA9063_ID_LDO4] = { .name = "ldo4", }, + [DA9063_ID_LDO5] = { .name = "ldo5", }, + [DA9063_ID_LDO6] = { .name = "ldo6", }, + [DA9063_ID_LDO10] = { .name = "ldo10", }, +}; + +static struct da9063_regulators_pdata *da9063_parse_regulators_dt( + struct platform_device *pdev, + struct of_regulator_match **da9063_reg_matches) +{ + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); + struct da9063_regulators_pdata *pdata; + struct da9063_regulator_data *rdata; + struct device_node *node; + int da9063_matches_len = ARRAY_SIZE(da9063_matches); + int i, n, num; + + if (da9063->type == PMIC_TYPE_DA9063L) + da9063_matches_len -= 6; + + node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); + if (!node) { + dev_err(&pdev->dev, "Regulators device node not found\n"); + return ERR_PTR(-ENODEV); + } + + num = of_regulator_match(&pdev->dev, node, da9063_matches, + da9063_matches_len); + of_node_put(node); + if (num < 0) { + dev_err(&pdev->dev, "Failed to match regulators\n"); + return ERR_PTR(-EINVAL); + } + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + pdata->regulator_data = devm_kcalloc(&pdev->dev, + num, sizeof(*pdata->regulator_data), + GFP_KERNEL); + if (!pdata->regulator_data) + return ERR_PTR(-ENOMEM); + pdata->n_regulators = num; + + n = 0; + for (i = 0; i < da9063_matches_len; i++) { + if (!da9063_matches[i].init_data) + continue; + + rdata = &pdata->regulator_data[n]; + rdata->id = i; + rdata->initdata = da9063_matches[i].init_data; + + n++; + } + + *da9063_reg_matches = da9063_matches; + return pdata; +} + +static int da9063_regulator_probe(struct platform_device *pdev) +{ + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); + struct of_regulator_match *da9063_reg_matches = NULL; + struct da9063_regulators_pdata *regl_pdata; + const struct da9063_dev_model *model; + struct da9063_regulators *regulators; + struct da9063_regulator *regl; + struct regulator_config config; + bool bcores_merged, bmem_bio_merged; + int id, irq, n, n_regulators, ret, val; + + regl_pdata = da9063_parse_regulators_dt(pdev, &da9063_reg_matches); + + if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) { + dev_err(&pdev->dev, + "No regulators defined for the platform\n"); + return -ENODEV; + } + + /* Find regulators set for particular device model */ + for (model = regulators_models; model->regulator_info; model++) { + if (model->type == da9063->type) + break; + } + if (!model->regulator_info) { + dev_err(&pdev->dev, "Chip model not recognised (%u)\n", + da9063->type); + return -ENODEV; + } + + ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val); + if (ret < 0) { + dev_err(&pdev->dev, + "Error while reading BUCKs configuration\n"); + return ret; + } + bcores_merged = val & DA9063_BCORE_MERGE; + bmem_bio_merged = val & DA9063_BUCK_MERGE; + + n_regulators = model->n_regulators; + if (bcores_merged) + n_regulators -= 2; /* remove BCORE1, BCORE2 */ + else + n_regulators--; /* remove BCORES_MERGED */ + if (bmem_bio_merged) + n_regulators -= 2; /* remove BMEM, BIO */ + else + n_regulators--; /* remove BMEM_BIO_MERGED */ + + /* Allocate memory required by usable regulators */ + regulators = devm_kzalloc(&pdev->dev, struct_size(regulators, + regulator, n_regulators), GFP_KERNEL); + if (!regulators) + return -ENOMEM; + + regulators->n_regulators = n_regulators; + platform_set_drvdata(pdev, regulators); + + /* Register all regulators declared in platform information */ + n = 0; + id = 0; + while (n < regulators->n_regulators) { + /* Skip regulator IDs depending on merge mode configuration */ + switch (id) { + case DA9063_ID_BCORE1: + case DA9063_ID_BCORE2: + if (bcores_merged) { + id++; + continue; + } + break; + case DA9063_ID_BMEM: + case DA9063_ID_BIO: + if (bmem_bio_merged) { + id++; + continue; + } + break; + case DA9063_ID_BCORES_MERGED: + if (!bcores_merged) { + id++; + continue; + } + break; + case DA9063_ID_BMEM_BIO_MERGED: + if (!bmem_bio_merged) { + id++; + continue; + } + break; + } + + /* Initialise regulator structure */ + regl = ®ulators->regulator[n]; + regl->hw = da9063; + regl->info = &model->regulator_info[id]; + regl->desc = regl->info->desc; + regl->desc.type = REGULATOR_VOLTAGE; + regl->desc.owner = THIS_MODULE; + + if (regl->info->mode.reg) { + regl->mode = devm_regmap_field_alloc(&pdev->dev, + da9063->regmap, regl->info->mode); + if (IS_ERR(regl->mode)) + return PTR_ERR(regl->mode); + } + + if (regl->info->suspend.reg) { + regl->suspend = devm_regmap_field_alloc(&pdev->dev, + da9063->regmap, regl->info->suspend); + if (IS_ERR(regl->suspend)) + return PTR_ERR(regl->suspend); + } + + if (regl->info->sleep.reg) { + regl->sleep = devm_regmap_field_alloc(&pdev->dev, + da9063->regmap, regl->info->sleep); + if (IS_ERR(regl->sleep)) + return PTR_ERR(regl->sleep); + } + + if (regl->info->suspend_sleep.reg) { + regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev, + da9063->regmap, regl->info->suspend_sleep); + if (IS_ERR(regl->suspend_sleep)) + return PTR_ERR(regl->suspend_sleep); + } + if (regl->info->vmon.reg) { + regl->vmon = devm_regmap_field_alloc(&pdev->dev, + da9063->regmap, regl->info->vmon); + if (IS_ERR(regl->vmon)) + return PTR_ERR(regl->vmon); + } + + /* Register regulator */ + memset(&config, 0, sizeof(config)); + config.dev = &pdev->dev; + config.init_data = da9063_get_regulator_initdata(regl_pdata, id); + config.driver_data = regl; + if (da9063_reg_matches) + config.of_node = da9063_reg_matches[id].of_node; + config.regmap = da9063->regmap; + + /* Checking constraints requires init_data from DT. */ + if (config.init_data) { + ret = da9063_check_xvp_constraints(&config); + if (ret) + return ret; + } + + regl->rdev = devm_regulator_register(&pdev->dev, ®l->desc, + &config); + if (IS_ERR(regl->rdev)) { + dev_err(&pdev->dev, + "Failed to register %s regulator\n", + regl->desc.name); + return PTR_ERR(regl->rdev); + } + id++; + n++; + } + + /* LDOs overcurrent event support */ + irq = platform_get_irq_byname(pdev, "LDO_LIM"); + if (irq < 0) + return irq; + + ret = devm_request_threaded_irq(&pdev->dev, irq, + NULL, da9063_ldo_lim_event, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "LDO_LIM", regulators); + if (ret) + dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n"); + + return ret; +} + +static struct platform_driver da9063_regulator_driver = { + .driver = { + .name = DA9063_DRVNAME_REGULATORS, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, + .probe = da9063_regulator_probe, +}; + +static int __init da9063_regulator_init(void) +{ + return platform_driver_register(&da9063_regulator_driver); +} +subsys_initcall(da9063_regulator_init); + +static void __exit da9063_regulator_cleanup(void) +{ + platform_driver_unregister(&da9063_regulator_driver); +} +module_exit(da9063_regulator_cleanup); + + +/* Module information */ +MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>"); +MODULE_DESCRIPTION("DA9063 regulators driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS); |