| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kyungmin Park | 2225 | 50.85% | 1 | 2.86% |
| Lukasz Majewski | 880 | 20.11% | 3 | 8.57% |
| Tomasz Figa | 699 | 15.97% | 2 | 5.71% |
| Axel Lin | 229 | 5.23% | 12 | 34.29% |
| MyungJoo Ham | 179 | 4.09% | 3 | 8.57% |
| Joonyoung Shim | 59 | 1.35% | 1 | 2.86% |
| Sachin Kamat | 36 | 0.82% | 2 | 5.71% |
| Mark Brown | 29 | 0.66% | 3 | 8.57% |
| Thiago Farina | 18 | 0.41% | 1 | 2.86% |
| Krzysztof Kozlowski | 7 | 0.16% | 1 | 2.86% |
| Javier Martinez Canillas | 6 | 0.14% | 1 | 2.86% |
| Kees Cook | 5 | 0.11% | 1 | 2.86% |
| Paweł Chmiel | 1 | 0.02% | 1 | 2.86% |
| Marek Szyprowski | 1 | 0.02% | 1 | 2.86% |
| Joe Perches | 1 | 0.02% | 1 | 2.86% |
| Rajendra Nayak | 1 | 0.02% | 1 | 2.86% |
| Total | 4376 | 35 |
// 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");
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