// SPDX-License-Identifier: GPL-2.0+ // // max8997.c - Regulator driver for the Maxim 8997/8966 // // Copyright (C) 2011 Samsung Electronics // MyungJoo Ham // // This driver is based on max8998.c #include #include #include #include #include #include #include #include #include #include #include #include struct max8997_data { struct device *dev; struct max8997_dev *iodev; int num_regulators; int ramp_delay; /* in mV/us */ bool buck1_gpiodvs; bool buck2_gpiodvs; bool buck5_gpiodvs; u8 buck1_vol[8]; u8 buck2_vol[8]; u8 buck5_vol[8]; struct gpio_desc *buck125_gpiods[3]; int buck125_gpioindex; bool ignore_gpiodvs_side_effect; u8 saved_states[MAX8997_REG_MAX]; }; static const unsigned int safeoutvolt[] = { 4850000, 4900000, 4950000, 3300000, }; static inline void max8997_set_gpio(struct max8997_data *max8997) { int set3 = (max8997->buck125_gpioindex) & 0x1; int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; gpiod_set_value(max8997->buck125_gpiods[0], set1); gpiod_set_value(max8997->buck125_gpiods[1], set2); gpiod_set_value(max8997->buck125_gpiods[2], set3); } struct voltage_map_desc { int min; int max; int step; }; /* Voltage maps in uV */ static const struct voltage_map_desc ldo_voltage_map_desc = { .min = 800000, .max = 3950000, .step = 50000, }; /* LDO1 ~ 18, 21 all */ static const struct voltage_map_desc buck1245_voltage_map_desc = { .min = 650000, .max = 2225000, .step = 25000, }; /* Buck1, 2, 4, 5 */ static const struct voltage_map_desc buck37_voltage_map_desc = { .min = 750000, .max = 3900000, .step = 50000, }; /* Buck3, 7 */ /* current map in uA */ static const struct voltage_map_desc charger_current_map_desc = { .min = 200000, .max = 950000, .step = 50000, }; static const struct voltage_map_desc topoff_current_map_desc = { .min = 50000, .max = 200000, .step = 10000, }; static const struct voltage_map_desc *reg_voltage_map[] = { [MAX8997_LDO1] = &ldo_voltage_map_desc, [MAX8997_LDO2] = &ldo_voltage_map_desc, [MAX8997_LDO3] = &ldo_voltage_map_desc, [MAX8997_LDO4] = &ldo_voltage_map_desc, [MAX8997_LDO5] = &ldo_voltage_map_desc, [MAX8997_LDO6] = &ldo_voltage_map_desc, [MAX8997_LDO7] = &ldo_voltage_map_desc, [MAX8997_LDO8] = &ldo_voltage_map_desc, [MAX8997_LDO9] = &ldo_voltage_map_desc, [MAX8997_LDO10] = &ldo_voltage_map_desc, [MAX8997_LDO11] = &ldo_voltage_map_desc, [MAX8997_LDO12] = &ldo_voltage_map_desc, [MAX8997_LDO13] = &ldo_voltage_map_desc, [MAX8997_LDO14] = &ldo_voltage_map_desc, [MAX8997_LDO15] = &ldo_voltage_map_desc, [MAX8997_LDO16] = &ldo_voltage_map_desc, [MAX8997_LDO17] = &ldo_voltage_map_desc, [MAX8997_LDO18] = &ldo_voltage_map_desc, [MAX8997_LDO21] = &ldo_voltage_map_desc, [MAX8997_BUCK1] = &buck1245_voltage_map_desc, [MAX8997_BUCK2] = &buck1245_voltage_map_desc, [MAX8997_BUCK3] = &buck37_voltage_map_desc, [MAX8997_BUCK4] = &buck1245_voltage_map_desc, [MAX8997_BUCK5] = &buck1245_voltage_map_desc, [MAX8997_BUCK6] = NULL, [MAX8997_BUCK7] = &buck37_voltage_map_desc, [MAX8997_EN32KHZ_AP] = NULL, [MAX8997_EN32KHZ_CP] = NULL, [MAX8997_ENVICHG] = NULL, [MAX8997_ESAFEOUT1] = NULL, [MAX8997_ESAFEOUT2] = NULL, [MAX8997_CHARGER_CV] = NULL, [MAX8997_CHARGER] = &charger_current_map_desc, [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, }; static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, unsigned int selector) { int rid = rdev_get_id(rdev); if (rid != MAX8997_CHARGER_CV) goto err; switch (selector) { case 0x00: return 4200000; case 0x01 ... 0x0E: return 4000000 + 20000 * (selector - 0x01); case 0x0F: return 4350000; default: return -EINVAL; } err: return -EINVAL; } static int max8997_list_voltage(struct regulator_dev *rdev, unsigned int selector) { const struct voltage_map_desc *desc; int rid = rdev_get_id(rdev); int val; if (rid < 0 || rid >= ARRAY_SIZE(reg_voltage_map)) return -EINVAL; desc = reg_voltage_map[rid]; if (desc == NULL) return -EINVAL; val = desc->min + desc->step * selector; if (val > desc->max) return -EINVAL; return val; } static int max8997_get_enable_register(struct regulator_dev *rdev, int *reg, int *mask, int *pattern) { int rid = rdev_get_id(rdev); switch (rid) { case MAX8997_LDO1 ... MAX8997_LDO21: *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); *mask = 0xC0; *pattern = 0xC0; break; case MAX8997_BUCK1: *reg = MAX8997_REG_BUCK1CTRL; *mask = 0x01; *pattern = 0x01; break; case MAX8997_BUCK2: *reg = MAX8997_REG_BUCK2CTRL; *mask = 0x01; *pattern = 0x01; break; case MAX8997_BUCK3: *reg = MAX8997_REG_BUCK3CTRL; *mask = 0x01; *pattern = 0x01; break; case MAX8997_BUCK4: *reg = MAX8997_REG_BUCK4CTRL; *mask = 0x01; *pattern = 0x01; break; case MAX8997_BUCK5: *reg = MAX8997_REG_BUCK5CTRL; *mask = 0x01; *pattern = 0x01; break; case MAX8997_BUCK6: *reg = MAX8997_REG_BUCK6CTRL; *mask = 0x01; *pattern = 0x01; break; case MAX8997_BUCK7: *reg = MAX8997_REG_BUCK7CTRL; *mask = 0x01; *pattern = 0x01; break; case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: *reg = MAX8997_REG_MAINCON1; *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); break; case MAX8997_ENVICHG: *reg = MAX8997_REG_MBCCTRL1; *mask = 0x80; *pattern = 0x80; break; case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: *reg = MAX8997_REG_SAFEOUTCTRL; *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); break; case MAX8997_CHARGER: *reg = MAX8997_REG_MBCCTRL2; *mask = 0x40; *pattern = 0x40; break; default: /* Not controllable or not exists */ return -EINVAL; } return 0; } static int max8997_reg_is_enabled(struct regulator_dev *rdev) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; int ret, reg, mask, pattern; u8 val; ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); if (ret) return ret; ret = max8997_read_reg(i2c, reg, &val); if (ret) return ret; return (val & mask) == pattern; } static int max8997_reg_enable(struct regulator_dev *rdev) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; int ret, reg, mask, pattern; ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); if (ret) return ret; return max8997_update_reg(i2c, reg, pattern, mask); } static int max8997_reg_disable(struct regulator_dev *rdev) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; int ret, reg, mask, pattern; ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); if (ret) return ret; return max8997_update_reg(i2c, reg, ~pattern, mask); } static int max8997_get_voltage_register(struct regulator_dev *rdev, int *_reg, int *_shift, int *_mask) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); int rid = rdev_get_id(rdev); int reg, shift = 0, mask = 0x3f; switch (rid) { case MAX8997_LDO1 ... MAX8997_LDO21: reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); break; case MAX8997_BUCK1: reg = MAX8997_REG_BUCK1DVS1; if (max8997->buck1_gpiodvs) reg += max8997->buck125_gpioindex; break; case MAX8997_BUCK2: reg = MAX8997_REG_BUCK2DVS1; if (max8997->buck2_gpiodvs) reg += max8997->buck125_gpioindex; break; case MAX8997_BUCK3: reg = MAX8997_REG_BUCK3DVS; break; case MAX8997_BUCK4: reg = MAX8997_REG_BUCK4DVS; break; case MAX8997_BUCK5: reg = MAX8997_REG_BUCK5DVS1; if (max8997->buck5_gpiodvs) reg += max8997->buck125_gpioindex; break; case MAX8997_BUCK7: reg = MAX8997_REG_BUCK7DVS; break; case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: reg = MAX8997_REG_SAFEOUTCTRL; shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; mask = 0x3; break; case MAX8997_CHARGER_CV: reg = MAX8997_REG_MBCCTRL3; shift = 0; mask = 0xf; break; case MAX8997_CHARGER: reg = MAX8997_REG_MBCCTRL4; shift = 0; mask = 0xf; break; case MAX8997_CHARGER_TOPOFF: reg = MAX8997_REG_MBCCTRL5; shift = 0; mask = 0xf; break; default: return -EINVAL; } *_reg = reg; *_shift = shift; *_mask = mask; return 0; } static int max8997_get_voltage_sel(struct regulator_dev *rdev) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; int reg, shift, mask, ret; u8 val; ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; ret = max8997_read_reg(i2c, reg, &val); if (ret) return ret; val >>= shift; val &= mask; return val; } static inline int max8997_get_voltage_proper_val( const struct voltage_map_desc *desc, int min_vol, int max_vol) { int i; if (desc == NULL) return -EINVAL; if (max_vol < desc->min || min_vol > desc->max) return -EINVAL; if (min_vol < desc->min) min_vol = desc->min; i = DIV_ROUND_UP(min_vol - desc->min, desc->step); if (desc->min + desc->step * i > max_vol) return -EINVAL; return i; } static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; int rid = rdev_get_id(rdev); int lb, ub; int reg, shift = 0, mask, ret = 0; u8 val = 0x0; if (rid != MAX8997_CHARGER_CV) return -EINVAL; ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; if (max_uV < 4000000 || min_uV > 4350000) return -EINVAL; if (min_uV <= 4000000) val = 0x1; else if (min_uV <= 4200000 && max_uV >= 4200000) val = 0x0; else { lb = (min_uV - 4000001) / 20000 + 2; ub = (max_uV - 4000000) / 20000 + 1; if (lb > ub) return -EINVAL; if (lb < 0xf) val = lb; else { if (ub >= 0xf) val = 0xf; else return -EINVAL; } } *selector = val; ret = max8997_update_reg(i2c, reg, val << shift, mask); return ret; } /* * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF * BUCK1, 2, and 5 are available if they are not controlled by gpio */ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; const struct voltage_map_desc *desc; int rid = rdev_get_id(rdev); int i, reg, shift, mask, ret; switch (rid) { case MAX8997_LDO1 ... MAX8997_LDO21: break; case MAX8997_BUCK1 ... MAX8997_BUCK5: break; case MAX8997_BUCK6: return -EINVAL; case MAX8997_BUCK7: break; case MAX8997_CHARGER: break; case MAX8997_CHARGER_TOPOFF: break; default: return -EINVAL; } desc = reg_voltage_map[rid]; i = max8997_get_voltage_proper_val(desc, min_uV, max_uV); if (i < 0) return i; ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); *selector = i; return ret; } static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, unsigned int old_selector, unsigned int new_selector) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); int rid = rdev_get_id(rdev); const struct voltage_map_desc *desc = reg_voltage_map[rid]; /* Delay is required only if the voltage is increasing */ if (old_selector >= new_selector) return 0; /* No need to delay if gpio_dvs_mode */ switch (rid) { case MAX8997_BUCK1: if (max8997->buck1_gpiodvs) return 0; break; case MAX8997_BUCK2: if (max8997->buck2_gpiodvs) return 0; break; case MAX8997_BUCK5: if (max8997->buck5_gpiodvs) return 0; break; } switch (rid) { case MAX8997_BUCK1: case MAX8997_BUCK2: case MAX8997_BUCK4: case MAX8997_BUCK5: return DIV_ROUND_UP(desc->step * (new_selector - old_selector), max8997->ramp_delay * 1000); } return 0; } /* * Assess the damage on the voltage setting of BUCK1,2,5 by the change. * * When GPIO-DVS mode is used for multiple bucks, changing the voltage value * of one of the bucks may affect that of another buck, which is the side * effect of the change (set_voltage). This function examines the GPIO-DVS * configurations and checks whether such side-effect exists. */ static int max8997_assess_side_effect(struct regulator_dev *rdev, u8 new_val, int *best) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); int rid = rdev_get_id(rdev); u8 *buckx_val[3]; bool buckx_gpiodvs[3]; int side_effect[8]; int min_side_effect = INT_MAX; int i; *best = -1; switch (rid) { case MAX8997_BUCK1: rid = 0; break; case MAX8997_BUCK2: rid = 1; break; case MAX8997_BUCK5: rid = 2; break; default: return -EINVAL; } buckx_val[0] = max8997->buck1_vol; buckx_val[1] = max8997->buck2_vol; buckx_val[2] = max8997->buck5_vol; buckx_gpiodvs[0] = max8997->buck1_gpiodvs; buckx_gpiodvs[1] = max8997->buck2_gpiodvs; buckx_gpiodvs[2] = max8997->buck5_gpiodvs; for (i = 0; i < 8; i++) { int others; if (new_val != (buckx_val[rid])[i]) { side_effect[i] = -1; continue; } side_effect[i] = 0; for (others = 0; others < 3; others++) { int diff; if (others == rid) continue; if (buckx_gpiodvs[others] == false) continue; /* Not affected */ diff = (buckx_val[others])[i] - (buckx_val[others])[max8997->buck125_gpioindex]; if (diff > 0) side_effect[i] += diff; else if (diff < 0) side_effect[i] -= diff; } if (side_effect[i] == 0) { *best = i; return 0; /* NO SIDE EFFECT! Use This! */ } if (side_effect[i] < min_side_effect) { min_side_effect = side_effect[i]; *best = i; } } if (*best == -1) return -EINVAL; return side_effect[*best]; } /* * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls * max8997_set_voltage_ldobuck to do the job. */ static int max8997_set_voltage_buck(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); int rid = rdev_get_id(rdev); const struct voltage_map_desc *desc; int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; bool gpio_dvs_mode = false; if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) return -EINVAL; switch (rid) { case MAX8997_BUCK1: if (max8997->buck1_gpiodvs) gpio_dvs_mode = true; break; case MAX8997_BUCK2: if (max8997->buck2_gpiodvs) gpio_dvs_mode = true; break; case MAX8997_BUCK5: if (max8997->buck5_gpiodvs) gpio_dvs_mode = true; break; } if (!gpio_dvs_mode) return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, selector); desc = reg_voltage_map[rid]; new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV); if (new_val < 0) return new_val; tmp_dmg = INT_MAX; tmp_idx = -1; tmp_val = -1; do { damage = max8997_assess_side_effect(rdev, new_val, &new_idx); if (damage == 0) goto out; if (tmp_dmg > damage) { tmp_idx = new_idx; tmp_val = new_val; tmp_dmg = damage; } new_val++; } while (desc->min + desc->step * new_val <= desc->max); new_idx = tmp_idx; new_val = tmp_val; if (max8997->ignore_gpiodvs_side_effect == false) return -EINVAL; dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET: %d -> %d\n", max8997->buck125_gpioindex, tmp_idx); out: if (new_idx < 0 || new_val < 0) return -EINVAL; max8997->buck125_gpioindex = new_idx; max8997_set_gpio(max8997); *selector = new_val; return 0; } /* For SAFEOUT1 and SAFEOUT2 */ static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, unsigned selector) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; int rid = rdev_get_id(rdev); int reg, shift = 0, mask, ret; if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) return -EINVAL; ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; return max8997_update_reg(i2c, reg, selector << shift, mask << shift); } static int max8997_reg_disable_suspend(struct regulator_dev *rdev) { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; int ret, reg, mask, pattern; int rid = rdev_get_id(rdev); ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); if (ret) return ret; max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); if (rid == MAX8997_LDO1 || rid == MAX8997_LDO10 || rid == MAX8997_LDO21) { dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", rdev->desc->name); return max8997_update_reg(i2c, reg, 0x40, mask); } dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", rdev->desc->name, max8997->saved_states[rid] & mask, (~pattern) & mask); return max8997_update_reg(i2c, reg, ~pattern, mask); } static const struct regulator_ops max8997_ldo_ops = { .list_voltage = max8997_list_voltage, .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, .get_voltage_sel = max8997_get_voltage_sel, .set_voltage = max8997_set_voltage_ldobuck, .set_suspend_disable = max8997_reg_disable_suspend, }; static const struct regulator_ops max8997_buck_ops = { .list_voltage = max8997_list_voltage, .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, .get_voltage_sel = max8997_get_voltage_sel, .set_voltage = max8997_set_voltage_buck, .set_voltage_time_sel = max8997_set_voltage_buck_time_sel, .set_suspend_disable = max8997_reg_disable_suspend, }; static const struct regulator_ops max8997_fixedvolt_ops = { .list_voltage = max8997_list_voltage, .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, .set_suspend_disable = max8997_reg_disable_suspend, }; static const struct regulator_ops max8997_safeout_ops = { .list_voltage = regulator_list_voltage_table, .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, .get_voltage_sel = max8997_get_voltage_sel, .set_voltage_sel = max8997_set_voltage_safeout_sel, .set_suspend_disable = max8997_reg_disable_suspend, }; static const struct regulator_ops max8997_fixedstate_ops = { .list_voltage = max8997_list_voltage_charger_cv, .get_voltage_sel = max8997_get_voltage_sel, .set_voltage = max8997_set_voltage_charger_cv, }; static int max8997_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { unsigned dummy; int rid = rdev_get_id(rdev); if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) return -EINVAL; /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); } static int max8997_get_current_limit(struct regulator_dev *rdev) { int sel, rid = rdev_get_id(rdev); if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) return -EINVAL; sel = max8997_get_voltage_sel(rdev); if (sel < 0) return sel; /* Reuse max8997_list_voltage to get current_limit. */ return max8997_list_voltage(rdev, sel); } static const struct regulator_ops max8997_charger_ops = { .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, .get_current_limit = max8997_get_current_limit, .set_current_limit = max8997_set_current_limit, }; static const struct regulator_ops max8997_charger_fixedstate_ops = { .get_current_limit = max8997_get_current_limit, .set_current_limit = max8997_set_current_limit, }; #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ .name = #_name, \ .id = MAX8997_##_name, \ .ops = &_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ } #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ .name = #_name, \ .id = MAX8997_##_name, \ .ops = &_ops, \ .type = REGULATOR_CURRENT, \ .owner = THIS_MODULE, \ } static struct regulator_desc regulators[] = { MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, max8997_charger_fixedstate_ops), }; #ifdef CONFIG_OF static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, struct max8997_platform_data *pdata) { struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); struct device_node *pmic_np, *reg_np; struct max8997_regulator_data *rdata; unsigned int i, dvs_voltage_nr = 1; pmic_np = iodev->dev->of_node; if (!pmic_np) { dev_err(&pdev->dev, "could not find pmic sub-node\n"); return -ENODEV; } struct device_node *regulators_np __free(device_node) = of_get_child_by_name(pmic_np, "regulators"); if (!regulators_np) { dev_err(&pdev->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(&pdev->dev, pdata->num_regulators, sizeof(*rdata), GFP_KERNEL); if (!rdata) return -ENOMEM; pdata->regulators = rdata; for_each_child_of_node(regulators_np, reg_np) { for (i = 0; i < ARRAY_SIZE(regulators); i++) if (of_node_name_eq(reg_np, regulators[i].name)) break; if (i == ARRAY_SIZE(regulators)) { dev_warn(&pdev->dev, "don't know how to configure regulator %pOFn\n", reg_np); continue; } rdata->id = i; rdata->initdata = of_get_regulator_init_data(&pdev->dev, reg_np, ®ulators[i]); rdata->reg_node = reg_np; rdata++; } pdata->buck1_gpiodvs = of_property_read_bool(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs"); pdata->buck2_gpiodvs = of_property_read_bool(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs"); pdata->buck5_gpiodvs = of_property_read_bool(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs"); if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || pdata->buck5_gpiodvs) { if (of_property_read_u32(pmic_np, "max8997,pmic-buck125-default-dvs-idx", &pdata->buck125_default_idx)) { pdata->buck125_default_idx = 0; } else { if (pdata->buck125_default_idx >= 8) { pdata->buck125_default_idx = 0; dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n"); } } pdata->ignore_gpiodvs_side_effect = of_property_read_bool(pmic_np, "max8997,pmic-ignore-gpiodvs-side-effect"); dvs_voltage_nr = 8; } if (of_property_read_u32_array(pmic_np, "max8997,pmic-buck1-dvs-voltage", pdata->buck1_voltage, dvs_voltage_nr)) { dev_err(&pdev->dev, "buck1 voltages not specified\n"); return -EINVAL; } if (of_property_read_u32_array(pmic_np, "max8997,pmic-buck2-dvs-voltage", pdata->buck2_voltage, dvs_voltage_nr)) { dev_err(&pdev->dev, "buck2 voltages not specified\n"); return -EINVAL; } if (of_property_read_u32_array(pmic_np, "max8997,pmic-buck5-dvs-voltage", pdata->buck5_voltage, dvs_voltage_nr)) { dev_err(&pdev->dev, "buck5 voltages not specified\n"); return -EINVAL; } return 0; } #else static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, struct max8997_platform_data *pdata) { return 0; } #endif /* CONFIG_OF */ static int max8997_pmic_probe(struct platform_device *pdev) { struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); struct max8997_platform_data *pdata = iodev->pdata; struct regulator_config config = { }; struct regulator_dev *rdev; struct max8997_data *max8997; struct i2c_client *i2c; int i, ret, nr_dvs; u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; if (!pdata) { dev_err(&pdev->dev, "No platform init data supplied.\n"); return -ENODEV; } if (iodev->dev->of_node) { ret = max8997_pmic_dt_parse_pdata(pdev, pdata); if (ret) return ret; } max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), GFP_KERNEL); if (!max8997) return -ENOMEM; max8997->dev = &pdev->dev; max8997->iodev = iodev; max8997->num_regulators = pdata->num_regulators; platform_set_drvdata(pdev, max8997); i2c = max8997->iodev->i2c; max8997->buck125_gpioindex = pdata->buck125_default_idx; max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || pdata->buck5_gpiodvs) ? 8 : 1; for (i = 0; i < nr_dvs; i++) { max8997->buck1_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, pdata->buck1_voltage[i], pdata->buck1_voltage[i] + buck1245_voltage_map_desc.step); if (ret < 0) return ret; max8997->buck2_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, pdata->buck2_voltage[i], pdata->buck2_voltage[i] + buck1245_voltage_map_desc.step); if (ret < 0) return ret; max8997->buck5_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, pdata->buck5_voltage[i], pdata->buck5_voltage[i] + buck1245_voltage_map_desc.step); if (ret < 0) return ret; if (max_buck1 < max8997->buck1_vol[i]) max_buck1 = max8997->buck1_vol[i]; if (max_buck2 < max8997->buck2_vol[i]) max_buck2 = max8997->buck2_vol[i]; if (max_buck5 < max8997->buck5_vol[i]) max_buck5 = max8997->buck5_vol[i]; } /* For the safety, set max voltage before setting up */ for (i = 0; i < 8; i++) { max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, max_buck1, 0x3f); max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, max_buck2, 0x3f); max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, max_buck5, 0x3f); } /* Initialize all the DVS related BUCK registers */ for (i = 0; i < nr_dvs; i++) { max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, max8997->buck1_vol[i], 0x3f); max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, max8997->buck2_vol[i], 0x3f); max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, max8997->buck5_vol[i], 0x3f); } /* * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. * If at least one of them cares, set gpios. */ if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || pdata->buck5_gpiodvs) { const char *gpio_names[3] = {"MAX8997 SET1", "MAX8997 SET2", "MAX8997 SET3"}; for (i = 0; i < 3; i++) { enum gpiod_flags flags; if (max8997->buck125_gpioindex & BIT(2 - i)) flags = GPIOD_OUT_HIGH; else flags = GPIOD_OUT_LOW; max8997->buck125_gpiods[i] = devm_gpiod_get_index(iodev->dev, "max8997,pmic-buck125-dvs", i, flags); if (IS_ERR(max8997->buck125_gpiods[i])) { ret = PTR_ERR(max8997->buck125_gpiods[i]); return dev_err_probe(iodev->dev, ret, "cant get GPIO %d (%d)\n", i, ret); } gpiod_set_consumer_name(max8997->buck125_gpiods[i], gpio_names[i]); } } /* DVS-GPIO disabled */ max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1); max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1); max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1); /* Misc Settings */ max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); for (i = 0; i < pdata->num_regulators; i++) { const struct voltage_map_desc *desc; int id = pdata->regulators[i].id; desc = reg_voltage_map[id]; if (desc) { regulators[id].n_voltages = (desc->max - desc->min) / desc->step + 1; } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) { regulators[id].volt_table = safeoutvolt; regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); } else if (id == MAX8997_CHARGER_CV) { regulators[id].n_voltages = 16; } config.dev = max8997->dev; config.init_data = pdata->regulators[i].initdata; config.driver_data = max8997; config.of_node = pdata->regulators[i].reg_node; rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); if (IS_ERR(rdev)) { dev_err(max8997->dev, "regulator init failed for %d\n", id); return PTR_ERR(rdev); } } return 0; } static const struct platform_device_id max8997_pmic_id[] = { { "max8997-pmic", 0}, { }, }; MODULE_DEVICE_TABLE(platform, max8997_pmic_id); static struct platform_driver max8997_pmic_driver = { .driver = { .name = "max8997-pmic", .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe = max8997_pmic_probe, .id_table = max8997_pmic_id, }; static int __init max8997_pmic_init(void) { return platform_driver_register(&max8997_pmic_driver); } subsys_initcall(max8997_pmic_init); static void __exit max8997_pmic_cleanup(void) { platform_driver_unregister(&max8997_pmic_driver); } module_exit(max8997_pmic_cleanup); MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); MODULE_AUTHOR("MyungJoo Ham "); MODULE_LICENSE("GPL");