| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // max8998.c - Voltage regulator driver for the Maxim 8998 |
| // |
| // Copyright (C) 2009-2010 Samsung Electronics |
| // Kyungmin Park <kyungmin.park@samsung.com> |
| // Marek Szyprowski <m.szyprowski@samsung.com> |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/i2c.h> |
| #include <linux/err.h> |
| #include <linux/gpio.h> |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/mutex.h> |
| #include <linux/of.h> |
| #include <linux/of_gpio.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/of_regulator.h> |
| #include <linux/mfd/max8998.h> |
| #include <linux/mfd/max8998-private.h> |
| |
| struct max8998_data { |
| struct device *dev; |
| struct max8998_dev *iodev; |
| int num_regulators; |
| u8 buck1_vol[4]; /* voltages for selection */ |
| u8 buck2_vol[2]; |
| unsigned int buck1_idx; /* index to last changed voltage */ |
| /* value in a set */ |
| unsigned int buck2_idx; |
| }; |
| |
| struct voltage_map_desc { |
| int min; |
| int max; |
| int step; |
| }; |
| |
| /* Voltage maps in uV*/ |
| static const struct voltage_map_desc ldo23_voltage_map_desc = { |
| .min = 800000, .step = 50000, .max = 1300000, |
| }; |
| static const struct voltage_map_desc ldo456711_voltage_map_desc = { |
| .min = 1600000, .step = 100000, .max = 3600000, |
| }; |
| static const struct voltage_map_desc ldo8_voltage_map_desc = { |
| .min = 3000000, .step = 100000, .max = 3600000, |
| }; |
| static const struct voltage_map_desc ldo9_voltage_map_desc = { |
| .min = 2800000, .step = 100000, .max = 3100000, |
| }; |
| static const struct voltage_map_desc ldo10_voltage_map_desc = { |
| .min = 950000, .step = 50000, .max = 1300000, |
| }; |
| static const struct voltage_map_desc ldo1213_voltage_map_desc = { |
| .min = 800000, .step = 100000, .max = 3300000, |
| }; |
| static const struct voltage_map_desc ldo1415_voltage_map_desc = { |
| .min = 1200000, .step = 100000, .max = 3300000, |
| }; |
| static const struct voltage_map_desc ldo1617_voltage_map_desc = { |
| .min = 1600000, .step = 100000, .max = 3600000, |
| }; |
| static const struct voltage_map_desc buck12_voltage_map_desc = { |
| .min = 750000, .step = 25000, .max = 1525000, |
| }; |
| static const struct voltage_map_desc buck3_voltage_map_desc = { |
| .min = 1600000, .step = 100000, .max = 3600000, |
| }; |
| static const struct voltage_map_desc buck4_voltage_map_desc = { |
| .min = 800000, .step = 100000, .max = 2300000, |
| }; |
| |
| static const struct voltage_map_desc *ldo_voltage_map[] = { |
| NULL, |
| NULL, |
| &ldo23_voltage_map_desc, /* LDO2 */ |
| &ldo23_voltage_map_desc, /* LDO3 */ |
| &ldo456711_voltage_map_desc, /* LDO4 */ |
| &ldo456711_voltage_map_desc, /* LDO5 */ |
| &ldo456711_voltage_map_desc, /* LDO6 */ |
| &ldo456711_voltage_map_desc, /* LDO7 */ |
| &ldo8_voltage_map_desc, /* LDO8 */ |
| &ldo9_voltage_map_desc, /* LDO9 */ |
| &ldo10_voltage_map_desc, /* LDO10 */ |
| &ldo456711_voltage_map_desc, /* LDO11 */ |
| &ldo1213_voltage_map_desc, /* LDO12 */ |
| &ldo1213_voltage_map_desc, /* LDO13 */ |
| &ldo1415_voltage_map_desc, /* LDO14 */ |
| &ldo1415_voltage_map_desc, /* LDO15 */ |
| &ldo1617_voltage_map_desc, /* LDO16 */ |
| &ldo1617_voltage_map_desc, /* LDO17 */ |
| &buck12_voltage_map_desc, /* BUCK1 */ |
| &buck12_voltage_map_desc, /* BUCK2 */ |
| &buck3_voltage_map_desc, /* BUCK3 */ |
| &buck4_voltage_map_desc, /* BUCK4 */ |
| }; |
| |
| static int max8998_get_enable_register(struct regulator_dev *rdev, |
| int *reg, int *shift) |
| { |
| int ldo = rdev_get_id(rdev); |
| |
| switch (ldo) { |
| case MAX8998_LDO2 ... MAX8998_LDO5: |
| *reg = MAX8998_REG_ONOFF1; |
| *shift = 3 - (ldo - MAX8998_LDO2); |
| break; |
| case MAX8998_LDO6 ... MAX8998_LDO13: |
| *reg = MAX8998_REG_ONOFF2; |
| *shift = 7 - (ldo - MAX8998_LDO6); |
| break; |
| case MAX8998_LDO14 ... MAX8998_LDO17: |
| *reg = MAX8998_REG_ONOFF3; |
| *shift = 7 - (ldo - MAX8998_LDO14); |
| break; |
| case MAX8998_BUCK1 ... MAX8998_BUCK4: |
| *reg = MAX8998_REG_ONOFF1; |
| *shift = 7 - (ldo - MAX8998_BUCK1); |
| break; |
| case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: |
| *reg = MAX8998_REG_ONOFF4; |
| *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); |
| break; |
| case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: |
| *reg = MAX8998_REG_CHGR2; |
| *shift = 7 - (ldo - MAX8998_ESAFEOUT1); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int max8998_ldo_is_enabled(struct regulator_dev *rdev) |
| { |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| struct i2c_client *i2c = max8998->iodev->i2c; |
| int ret, reg, shift = 8; |
| u8 val; |
| |
| ret = max8998_get_enable_register(rdev, ®, &shift); |
| if (ret) |
| return ret; |
| |
| ret = max8998_read_reg(i2c, reg, &val); |
| if (ret) |
| return ret; |
| |
| return val & (1 << shift); |
| } |
| |
| static int max8998_ldo_enable(struct regulator_dev *rdev) |
| { |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| struct i2c_client *i2c = max8998->iodev->i2c; |
| int reg, shift = 8, ret; |
| |
| ret = max8998_get_enable_register(rdev, ®, &shift); |
| if (ret) |
| return ret; |
| |
| return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
| } |
| |
| static int max8998_ldo_disable(struct regulator_dev *rdev) |
| { |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| struct i2c_client *i2c = max8998->iodev->i2c; |
| int reg, shift = 8, ret; |
| |
| ret = max8998_get_enable_register(rdev, ®, &shift); |
| if (ret) |
| return ret; |
| |
| return max8998_update_reg(i2c, reg, 0, 1<<shift); |
| } |
| |
| static int max8998_get_voltage_register(struct regulator_dev *rdev, |
| int *_reg, int *_shift, int *_mask) |
| { |
| int ldo = rdev_get_id(rdev); |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| int reg, shift = 0, mask = 0xff; |
| |
| switch (ldo) { |
| case MAX8998_LDO2 ... MAX8998_LDO3: |
| reg = MAX8998_REG_LDO2_LDO3; |
| mask = 0xf; |
| if (ldo == MAX8998_LDO2) |
| shift = 4; |
| else |
| shift = 0; |
| break; |
| case MAX8998_LDO4 ... MAX8998_LDO7: |
| reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); |
| break; |
| case MAX8998_LDO8 ... MAX8998_LDO9: |
| reg = MAX8998_REG_LDO8_LDO9; |
| mask = 0xf; |
| if (ldo == MAX8998_LDO8) |
| shift = 4; |
| else |
| shift = 0; |
| break; |
| case MAX8998_LDO10 ... MAX8998_LDO11: |
| reg = MAX8998_REG_LDO10_LDO11; |
| if (ldo == MAX8998_LDO10) { |
| shift = 5; |
| mask = 0x7; |
| } else { |
| shift = 0; |
| mask = 0x1f; |
| } |
| break; |
| case MAX8998_LDO12 ... MAX8998_LDO17: |
| reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); |
| break; |
| case MAX8998_BUCK1: |
| reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
| break; |
| case MAX8998_BUCK2: |
| reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
| break; |
| case MAX8998_BUCK3: |
| reg = MAX8998_REG_BUCK3; |
| break; |
| case MAX8998_BUCK4: |
| reg = MAX8998_REG_BUCK4; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| *_reg = reg; |
| *_shift = shift; |
| *_mask = mask; |
| |
| return 0; |
| } |
| |
| static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
| { |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| struct i2c_client *i2c = max8998->iodev->i2c; |
| int reg, shift = 0, mask, ret; |
| u8 val; |
| |
| ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
| if (ret) |
| return ret; |
| |
| ret = max8998_read_reg(i2c, reg, &val); |
| if (ret) |
| return ret; |
| |
| val >>= shift; |
| val &= mask; |
| |
| return val; |
| } |
| |
| static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, |
| unsigned selector) |
| { |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| struct i2c_client *i2c = max8998->iodev->i2c; |
| int reg, shift = 0, mask, ret; |
| |
| ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
| if (ret) |
| return ret; |
| |
| ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); |
| |
| return ret; |
| } |
| |
| static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
| { |
| gpio_set_value(gpio1, v & 0x1); |
| gpio_set_value(gpio2, (v >> 1) & 0x1); |
| } |
| |
| static inline void buck2_gpio_set(int gpio, int v) |
| { |
| gpio_set_value(gpio, v & 0x1); |
| } |
| |
| static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, |
| unsigned selector) |
| { |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| struct max8998_platform_data *pdata = max8998->iodev->pdata; |
| struct i2c_client *i2c = max8998->iodev->i2c; |
| int buck = rdev_get_id(rdev); |
| int reg, shift = 0, mask, ret, j; |
| static u8 buck1_last_val; |
| |
| ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
| if (ret) |
| return ret; |
| |
| switch (buck) { |
| case MAX8998_BUCK1: |
| dev_dbg(max8998->dev, |
| "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
| "buck1_vol3:%d, buck1_vol4:%d\n", |
| selector, max8998->buck1_vol[0], max8998->buck1_vol[1], |
| max8998->buck1_vol[2], max8998->buck1_vol[3]); |
| |
| if (gpio_is_valid(pdata->buck1_set1) && |
| gpio_is_valid(pdata->buck1_set2)) { |
| |
| /* check if requested voltage */ |
| /* value is already defined */ |
| for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { |
| if (max8998->buck1_vol[j] == selector) { |
| max8998->buck1_idx = j; |
| buck1_gpio_set(pdata->buck1_set1, |
| pdata->buck1_set2, j); |
| goto buck1_exit; |
| } |
| } |
| |
| if (pdata->buck_voltage_lock) |
| return -EINVAL; |
| |
| /* no predefine regulator found */ |
| max8998->buck1_idx = (buck1_last_val % 2) + 2; |
| dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", |
| max8998->buck1_idx); |
| max8998->buck1_vol[max8998->buck1_idx] = selector; |
| ret = max8998_get_voltage_register(rdev, ®, |
| &shift, |
| &mask); |
| ret = max8998_write_reg(i2c, reg, selector); |
| buck1_gpio_set(pdata->buck1_set1, |
| pdata->buck1_set2, max8998->buck1_idx); |
| buck1_last_val++; |
| buck1_exit: |
| dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", |
| i2c->name, gpio_get_value(pdata->buck1_set1), |
| gpio_get_value(pdata->buck1_set2)); |
| break; |
| } else { |
| ret = max8998_write_reg(i2c, reg, selector); |
| } |
| break; |
| |
| case MAX8998_BUCK2: |
| dev_dbg(max8998->dev, |
| "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", |
| selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); |
| if (gpio_is_valid(pdata->buck2_set3)) { |
| |
| /* check if requested voltage */ |
| /* value is already defined */ |
| for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { |
| if (max8998->buck2_vol[j] == selector) { |
| max8998->buck2_idx = j; |
| buck2_gpio_set(pdata->buck2_set3, j); |
| goto buck2_exit; |
| } |
| } |
| |
| if (pdata->buck_voltage_lock) |
| return -EINVAL; |
| |
| max8998_get_voltage_register(rdev, |
| ®, &shift, &mask); |
| ret = max8998_write_reg(i2c, reg, selector); |
| max8998->buck2_vol[max8998->buck2_idx] = selector; |
| buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); |
| buck2_exit: |
| dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
| gpio_get_value(pdata->buck2_set3)); |
| } else { |
| ret = max8998_write_reg(i2c, reg, selector); |
| } |
| break; |
| |
| case MAX8998_BUCK3: |
| case MAX8998_BUCK4: |
| ret = max8998_update_reg(i2c, reg, selector<<shift, |
| mask<<shift); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
| unsigned int old_selector, |
| unsigned int new_selector) |
| { |
| struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| struct i2c_client *i2c = max8998->iodev->i2c; |
| const struct voltage_map_desc *desc; |
| int buck = rdev_get_id(rdev); |
| u8 val = 0; |
| int difference, ret; |
| |
| if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) |
| return -EINVAL; |
| |
| desc = ldo_voltage_map[buck]; |
| |
| /* Voltage stabilization */ |
| ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); |
| if (ret) |
| return ret; |
| |
| /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ |
| /* MAX8998 has ENRAMP bit implemented, so test it*/ |
| if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) |
| return 0; |
| |
| difference = (new_selector - old_selector) * desc->step / 1000; |
| if (difference > 0) |
| return DIV_ROUND_UP(difference, (val & 0x0f) + 1); |
| |
| return 0; |
| } |
| |
| static struct regulator_ops max8998_ldo_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .map_voltage = regulator_map_voltage_linear, |
| .is_enabled = max8998_ldo_is_enabled, |
| .enable = max8998_ldo_enable, |
| .disable = max8998_ldo_disable, |
| .get_voltage_sel = max8998_get_voltage_sel, |
| .set_voltage_sel = max8998_set_voltage_ldo_sel, |
| }; |
| |
| static struct regulator_ops max8998_buck_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .map_voltage = regulator_map_voltage_linear, |
| .is_enabled = max8998_ldo_is_enabled, |
| .enable = max8998_ldo_enable, |
| .disable = max8998_ldo_disable, |
| .get_voltage_sel = max8998_get_voltage_sel, |
| .set_voltage_sel = max8998_set_voltage_buck_sel, |
| .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, |
| }; |
| |
| static struct regulator_ops max8998_others_ops = { |
| .is_enabled = max8998_ldo_is_enabled, |
| .enable = max8998_ldo_enable, |
| .disable = max8998_ldo_disable, |
| }; |
| |
| static struct regulator_desc regulators[] = { |
| { |
| .name = "LDO2", |
| .id = MAX8998_LDO2, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO3", |
| .id = MAX8998_LDO3, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO4", |
| .id = MAX8998_LDO4, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO5", |
| .id = MAX8998_LDO5, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO6", |
| .id = MAX8998_LDO6, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO7", |
| .id = MAX8998_LDO7, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO8", |
| .id = MAX8998_LDO8, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO9", |
| .id = MAX8998_LDO9, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO10", |
| .id = MAX8998_LDO10, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO11", |
| .id = MAX8998_LDO11, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO12", |
| .id = MAX8998_LDO12, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO13", |
| .id = MAX8998_LDO13, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO14", |
| .id = MAX8998_LDO14, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO15", |
| .id = MAX8998_LDO15, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO16", |
| .id = MAX8998_LDO16, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO17", |
| .id = MAX8998_LDO17, |
| .ops = &max8998_ldo_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "BUCK1", |
| .id = MAX8998_BUCK1, |
| .ops = &max8998_buck_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "BUCK2", |
| .id = MAX8998_BUCK2, |
| .ops = &max8998_buck_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "BUCK3", |
| .id = MAX8998_BUCK3, |
| .ops = &max8998_buck_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "BUCK4", |
| .id = MAX8998_BUCK4, |
| .ops = &max8998_buck_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "EN32KHz-AP", |
| .id = MAX8998_EN32KHZ_AP, |
| .ops = &max8998_others_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "EN32KHz-CP", |
| .id = MAX8998_EN32KHZ_CP, |
| .ops = &max8998_others_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "ENVICHG", |
| .id = MAX8998_ENVICHG, |
| .ops = &max8998_others_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "ESAFEOUT1", |
| .id = MAX8998_ESAFEOUT1, |
| .ops = &max8998_others_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "ESAFEOUT2", |
| .id = MAX8998_ESAFEOUT2, |
| .ops = &max8998_others_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| } |
| }; |
| |
| static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, |
| struct max8998_platform_data *pdata, |
| struct device_node *pmic_np) |
| { |
| int gpio; |
| |
| gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0); |
| if (!gpio_is_valid(gpio)) { |
| dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio); |
| return -EINVAL; |
| } |
| pdata->buck1_set1 = gpio; |
| |
| gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1); |
| if (!gpio_is_valid(gpio)) { |
| dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio); |
| return -EINVAL; |
| } |
| pdata->buck1_set2 = gpio; |
| |
| gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0); |
| if (!gpio_is_valid(gpio)) { |
| dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio); |
| return -EINVAL; |
| } |
| pdata->buck2_set3 = gpio; |
| |
| return 0; |
| } |
| |
| static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, |
| struct max8998_platform_data *pdata) |
| { |
| struct device_node *pmic_np = iodev->dev->of_node; |
| struct device_node *regulators_np, *reg_np; |
| struct max8998_regulator_data *rdata; |
| unsigned int i; |
| int ret; |
| |
| regulators_np = of_get_child_by_name(pmic_np, "regulators"); |
| if (!regulators_np) { |
| dev_err(iodev->dev, "could not find regulators sub-node\n"); |
| return -EINVAL; |
| } |
| |
| /* count the number of regulators to be supported in pmic */ |
| pdata->num_regulators = of_get_child_count(regulators_np); |
| |
| rdata = devm_kcalloc(iodev->dev, |
| pdata->num_regulators, sizeof(*rdata), |
| GFP_KERNEL); |
| if (!rdata) { |
| of_node_put(regulators_np); |
| return -ENOMEM; |
| } |
| |
| pdata->regulators = rdata; |
| for (i = 0; i < ARRAY_SIZE(regulators); ++i) { |
| reg_np = of_get_child_by_name(regulators_np, |
| regulators[i].name); |
| if (!reg_np) |
| continue; |
| |
| rdata->id = regulators[i].id; |
| rdata->initdata = of_get_regulator_init_data(iodev->dev, |
| reg_np, |
| ®ulators[i]); |
| rdata->reg_node = reg_np; |
| ++rdata; |
| } |
| pdata->num_regulators = rdata - pdata->regulators; |
| |
| of_node_put(reg_np); |
| of_node_put(regulators_np); |
| |
| ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); |
| if (ret) |
| return -EINVAL; |
| |
| if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL)) |
| pdata->buck_voltage_lock = true; |
| |
| ret = of_property_read_u32(pmic_np, |
| "max8998,pmic-buck1-default-dvs-idx", |
| &pdata->buck1_default_idx); |
| if (!ret && pdata->buck1_default_idx >= 4) { |
| pdata->buck1_default_idx = 0; |
| dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); |
| } |
| |
| ret = of_property_read_u32(pmic_np, |
| "max8998,pmic-buck2-default-dvs-idx", |
| &pdata->buck2_default_idx); |
| if (!ret && pdata->buck2_default_idx >= 2) { |
| pdata->buck2_default_idx = 0; |
| dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); |
| } |
| |
| ret = of_property_read_u32_array(pmic_np, |
| "max8998,pmic-buck1-dvs-voltage", |
| pdata->buck1_voltage, |
| ARRAY_SIZE(pdata->buck1_voltage)); |
| if (ret) { |
| dev_err(iodev->dev, "buck1 voltages not specified\n"); |
| return -EINVAL; |
| } |
| |
| ret = of_property_read_u32_array(pmic_np, |
| "max8998,pmic-buck2-dvs-voltage", |
| pdata->buck2_voltage, |
| ARRAY_SIZE(pdata->buck2_voltage)); |
| if (ret) { |
| dev_err(iodev->dev, "buck2 voltages not specified\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int max8998_pmic_probe(struct platform_device *pdev) |
| { |
| struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
| struct max8998_platform_data *pdata = iodev->pdata; |
| struct regulator_config config = { }; |
| struct regulator_dev *rdev; |
| struct max8998_data *max8998; |
| struct i2c_client *i2c; |
| int i, ret; |
| unsigned int v; |
| |
| if (!pdata) { |
| dev_err(pdev->dev.parent, "No platform init data supplied\n"); |
| return -ENODEV; |
| } |
| |
| if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) { |
| ret = max8998_pmic_dt_parse_pdata(iodev, pdata); |
| if (ret) |
| return ret; |
| } |
| |
| max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), |
| GFP_KERNEL); |
| if (!max8998) |
| return -ENOMEM; |
| |
| max8998->dev = &pdev->dev; |
| max8998->iodev = iodev; |
| max8998->num_regulators = pdata->num_regulators; |
| platform_set_drvdata(pdev, max8998); |
| i2c = max8998->iodev->i2c; |
| |
| max8998->buck1_idx = pdata->buck1_default_idx; |
| max8998->buck2_idx = pdata->buck2_default_idx; |
| |
| /* NOTE: */ |
| /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ |
| /* will be displayed */ |
| |
| /* Check if MAX8998 voltage selection GPIOs are defined */ |
| if (gpio_is_valid(pdata->buck1_set1) && |
| gpio_is_valid(pdata->buck1_set2)) { |
| /* Check if SET1 is not equal to 0 */ |
| if (!pdata->buck1_set1) { |
| dev_err(&pdev->dev, |
| "MAX8998 SET1 GPIO defined as 0 !\n"); |
| WARN_ON(!pdata->buck1_set1); |
| return -EIO; |
| } |
| /* Check if SET2 is not equal to 0 */ |
| if (!pdata->buck1_set2) { |
| dev_err(&pdev->dev, |
| "MAX8998 SET2 GPIO defined as 0 !\n"); |
| WARN_ON(!pdata->buck1_set2); |
| return -EIO; |
| } |
| |
| gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); |
| gpio_direction_output(pdata->buck1_set1, |
| max8998->buck1_idx & 0x1); |
| |
| |
| gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); |
| gpio_direction_output(pdata->buck1_set2, |
| (max8998->buck1_idx >> 1) & 0x1); |
| |
| /* Set predefined values for BUCK1 registers */ |
| for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) { |
| i = 0; |
| while (buck12_voltage_map_desc.min + |
| buck12_voltage_map_desc.step*i |
| < pdata->buck1_voltage[v]) |
| i++; |
| |
| max8998->buck1_vol[v] = i; |
| ret = max8998_write_reg(i2c, |
| MAX8998_REG_BUCK1_VOLTAGE1 + v, i); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| if (gpio_is_valid(pdata->buck2_set3)) { |
| /* Check if SET3 is not equal to 0 */ |
| if (!pdata->buck2_set3) { |
| dev_err(&pdev->dev, |
| "MAX8998 SET3 GPIO defined as 0 !\n"); |
| WARN_ON(!pdata->buck2_set3); |
| return -EIO; |
| } |
| gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); |
| gpio_direction_output(pdata->buck2_set3, |
| max8998->buck2_idx & 0x1); |
| |
| /* Set predefined values for BUCK2 registers */ |
| for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) { |
| i = 0; |
| while (buck12_voltage_map_desc.min + |
| buck12_voltage_map_desc.step*i |
| < pdata->buck2_voltage[v]) |
| i++; |
| |
| max8998->buck2_vol[v] = i; |
| ret = max8998_write_reg(i2c, |
| MAX8998_REG_BUCK2_VOLTAGE1 + v, i); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| for (i = 0; i < pdata->num_regulators; i++) { |
| const struct voltage_map_desc *desc; |
| int id = pdata->regulators[i].id; |
| int index = id - MAX8998_LDO2; |
| |
| desc = ldo_voltage_map[id]; |
| if (desc && regulators[index].ops != &max8998_others_ops) { |
| int count = (desc->max - desc->min) / desc->step + 1; |
| |
| regulators[index].n_voltages = count; |
| regulators[index].min_uV = desc->min; |
| regulators[index].uV_step = desc->step; |
| } |
| |
| config.dev = max8998->dev; |
| config.of_node = pdata->regulators[i].reg_node; |
| config.init_data = pdata->regulators[i].initdata; |
| config.driver_data = max8998; |
| |
| rdev = devm_regulator_register(&pdev->dev, ®ulators[index], |
| &config); |
| if (IS_ERR(rdev)) { |
| ret = PTR_ERR(rdev); |
| dev_err(max8998->dev, "regulator %s init failed (%d)\n", |
| regulators[index].name, ret); |
| return ret; |
| } |
| } |
| |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id max8998_pmic_id[] = { |
| { "max8998-pmic", TYPE_MAX8998 }, |
| { "lp3974-pmic", TYPE_LP3974 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
| |
| static struct platform_driver max8998_pmic_driver = { |
| .driver = { |
| .name = "max8998-pmic", |
| }, |
| .probe = max8998_pmic_probe, |
| .id_table = max8998_pmic_id, |
| }; |
| |
| static int __init max8998_pmic_init(void) |
| { |
| return platform_driver_register(&max8998_pmic_driver); |
| } |
| subsys_initcall(max8998_pmic_init); |
| |
| static void __exit max8998_pmic_cleanup(void) |
| { |
| platform_driver_unregister(&max8998_pmic_driver); |
| } |
| module_exit(max8998_pmic_cleanup); |
| |
| MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); |
| MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); |
| MODULE_LICENSE("GPL"); |