| /* |
| * max8997.c - Regulator driver for the Maxim 8997/8966 |
| * |
| * Copyright (C) 2011 Samsung Electronics |
| * MyungJoo Ham <myungjoo.ham@smasung.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * This driver is based on max8998.c |
| */ |
| |
| #include <linux/bug.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/gpio.h> |
| #include <linux/slab.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/mfd/max8997.h> |
| #include <linux/mfd/max8997-private.h> |
| |
| struct max8997_data { |
| struct device *dev; |
| struct max8997_dev *iodev; |
| int num_regulators; |
| struct regulator_dev **rdev; |
| 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]; |
| int buck125_gpios[3]; |
| int buck125_gpioindex; |
| bool ignore_gpiodvs_side_effect; |
| |
| u8 saved_states[MAX8997_REG_MAX]; |
| }; |
| |
| 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; |
| |
| gpio_set_value(max8997->buck125_gpios[0], set1); |
| gpio_set_value(max8997->buck125_gpios[1], set2); |
| gpio_set_value(max8997->buck125_gpios[2], set3); |
| } |
| |
| struct voltage_map_desc { |
| int min; |
| int max; |
| int step; |
| unsigned int n_bits; |
| }; |
| |
| /* Voltage maps in mV */ |
| static const struct voltage_map_desc ldo_voltage_map_desc = { |
| .min = 800, .max = 3950, .step = 50, .n_bits = 6, |
| }; /* LDO1 ~ 18, 21 all */ |
| |
| static const struct voltage_map_desc buck1245_voltage_map_desc = { |
| .min = 650, .max = 2225, .step = 25, .n_bits = 6, |
| }; /* Buck1, 2, 4, 5 */ |
| |
| static const struct voltage_map_desc buck37_voltage_map_desc = { |
| .min = 750, .max = 3900, .step = 50, .n_bits = 6, |
| }; /* Buck3, 7 */ |
| |
| /* current map in mA */ |
| static const struct voltage_map_desc charger_current_map_desc = { |
| .min = 200, .max = 950, .step = 50, .n_bits = 4, |
| }; |
| |
| static const struct voltage_map_desc topoff_current_map_desc = { |
| .min = 50, .max = 200, .step = 10, .n_bits = 4, |
| }; |
| |
| 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 inline int max8997_get_rid(struct regulator_dev *rdev) |
| { |
| return rdev_get_id(rdev); |
| } |
| |
| static int max8997_list_voltage_safeout(struct regulator_dev *rdev, |
| unsigned int selector) |
| { |
| int rid = max8997_get_rid(rdev); |
| |
| if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) { |
| switch (selector) { |
| case 0: |
| return 4850000; |
| case 1: |
| return 4900000; |
| case 2: |
| return 4950000; |
| case 3: |
| return 3300000; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, |
| unsigned int selector) |
| { |
| int rid = max8997_get_rid(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 = max8997_get_rid(rdev); |
| int val; |
| |
| if (rid >= ARRAY_SIZE(reg_voltage_map) || |
| rid < 0) |
| 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 * 1000; |
| } |
| |
| static int max8997_get_enable_register(struct regulator_dev *rdev, |
| int *reg, int *mask, int *pattern) |
| { |
| int rid = max8997_get_rid(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 == -EINVAL) |
| return 1; /* "not controllable" */ |
| else 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) |
| { |
| int rid = max8997_get_rid(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; |
| break; |
| case MAX8997_BUCK2: |
| reg = MAX8997_REG_BUCK2DVS1; |
| break; |
| case MAX8997_BUCK3: |
| reg = MAX8997_REG_BUCK3DVS; |
| break; |
| case MAX8997_BUCK4: |
| reg = MAX8997_REG_BUCK4DVS; |
| break; |
| case MAX8997_BUCK5: |
| reg = MAX8997_REG_BUCK5DVS1; |
| 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(struct regulator_dev *rdev) |
| { |
| struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
| struct i2c_client *i2c = max8997->iodev->i2c; |
| int reg, shift, mask, ret; |
| int rid = max8997_get_rid(rdev); |
| u8 val; |
| |
| ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
| if (ret) |
| return ret; |
| |
| if ((rid == MAX8997_BUCK1 && max8997->buck1_gpiodvs) || |
| (rid == MAX8997_BUCK2 && max8997->buck2_gpiodvs) || |
| (rid == MAX8997_BUCK5 && max8997->buck5_gpiodvs)) |
| reg += max8997->buck125_gpioindex; |
| |
| ret = max8997_read_reg(i2c, reg, &val); |
| if (ret) |
| return ret; |
| |
| val >>= shift; |
| val &= mask; |
| |
| if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage) |
| return rdev->desc->ops->list_voltage(rdev, val); |
| |
| /* |
| * max8997_list_voltage returns value for any rdev with voltage_map, |
| * which works for "CHARGER" and "CHARGER TOPOFF" that do not have |
| * list_voltage ops (they are current regulators). |
| */ |
| return max8997_list_voltage(rdev, val); |
| } |
| |
| static inline int max8997_get_voltage_proper_val( |
| const struct voltage_map_desc *desc, |
| int min_vol, int max_vol) |
| { |
| int i = 0; |
| |
| if (desc == NULL) |
| return -EINVAL; |
| |
| if (max_vol < desc->min || min_vol > desc->max) |
| return -EINVAL; |
| |
| while (desc->min + desc->step * i < min_vol && |
| desc->min + desc->step * i < desc->max) |
| i++; |
| |
| if (desc->min + desc->step * i > max_vol) |
| return -EINVAL; |
| |
| if (i >= (1 << desc->n_bits)) |
| 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 = max8997_get_rid(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) { |
| if (max_uV >= 4000000) |
| return -EINVAL; |
| else |
| 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; |
| int min_vol = min_uV / 1000, max_vol = max_uV / 1000; |
| const struct voltage_map_desc *desc; |
| int rid = max8997_get_rid(rdev); |
| int reg, shift = 0, mask, ret; |
| int i; |
| u8 org; |
| |
| 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_vol, max_vol); |
| if (i < 0) |
| return i; |
| |
| ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
| if (ret) |
| return ret; |
| |
| max8997_read_reg(i2c, reg, &org); |
| org = (org & mask) >> shift; |
| |
| ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
| *selector = i; |
| |
| if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 || |
| rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) { |
| /* If the voltage is increasing */ |
| if (org < i) |
| udelay(desc->step * (i - org) / max8997->ramp_delay); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * 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 = max8997_get_rid(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 = max8997_get_rid(rdev); |
| const struct voltage_map_desc *desc; |
| int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; |
| bool gpio_dvs_mode = false; |
| int min_vol = min_uV / 1000, max_vol = max_uV / 1000; |
| |
| 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_vol, max_vol); |
| 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; |
| } |
| |
| static const int safeoutvolt[] = { |
| 3300000, |
| 4850000, |
| 4900000, |
| 4950000, |
| }; |
| |
| /* For SAFEOUT1 and SAFEOUT2 */ |
| static int max8997_set_voltage_safeout(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 = max8997_get_rid(rdev); |
| int reg, shift = 0, mask, ret; |
| int i = 0; |
| u8 val; |
| |
| if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) |
| return -EINVAL; |
| |
| for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) { |
| if (min_uV <= safeoutvolt[i] && |
| max_uV >= safeoutvolt[i]) |
| break; |
| } |
| |
| if (i >= ARRAY_SIZE(safeoutvolt)) |
| return -EINVAL; |
| |
| if (i == 0) |
| val = 0x3; |
| else |
| val = i - 1; |
| |
| ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
| if (ret) |
| return ret; |
| |
| ret = max8997_update_reg(i2c, reg, val << shift, mask << shift); |
| *selector = val; |
| |
| return ret; |
| } |
| |
| static int max8997_reg_enable_suspend(struct regulator_dev *rdev) |
| { |
| return 0; |
| } |
| |
| 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 = max8997_get_rid(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 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 = max8997_get_voltage, |
| .set_voltage = max8997_set_voltage_ldobuck, |
| .set_suspend_enable = max8997_reg_enable_suspend, |
| .set_suspend_disable = max8997_reg_disable_suspend, |
| }; |
| |
| static 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 = max8997_get_voltage, |
| .set_voltage = max8997_set_voltage_buck, |
| .set_suspend_enable = max8997_reg_enable_suspend, |
| .set_suspend_disable = max8997_reg_disable_suspend, |
| }; |
| |
| static 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_enable = max8997_reg_enable_suspend, |
| .set_suspend_disable = max8997_reg_disable_suspend, |
| }; |
| |
| static struct regulator_ops max8997_safeout_ops = { |
| .list_voltage = max8997_list_voltage_safeout, |
| .is_enabled = max8997_reg_is_enabled, |
| .enable = max8997_reg_enable, |
| .disable = max8997_reg_disable, |
| .get_voltage = max8997_get_voltage, |
| .set_voltage = max8997_set_voltage_safeout, |
| .set_suspend_enable = max8997_reg_enable_suspend, |
| .set_suspend_disable = max8997_reg_disable_suspend, |
| }; |
| |
| static struct regulator_ops max8997_fixedstate_ops = { |
| .list_voltage = max8997_list_voltage_charger_cv, |
| .get_voltage = max8997_get_voltage, |
| .set_voltage = max8997_set_voltage_charger_cv, |
| }; |
| |
| static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev, |
| int min_uV, int max_uV) |
| { |
| unsigned dummy; |
| |
| return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy); |
| } |
| |
| |
| static 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_voltage, |
| .set_current_limit = max8997_set_voltage_ldobuck_wrap, |
| }; |
| |
| static struct regulator_ops max8997_charger_fixedstate_ops = { |
| .is_enabled = max8997_reg_is_enabled, |
| .get_current_limit = max8997_get_voltage, |
| .set_current_limit = max8997_set_voltage_ldobuck_wrap, |
| }; |
| |
| #define regulator_desc_ldo(num) { \ |
| .name = "LDO"#num, \ |
| .id = MAX8997_LDO##num, \ |
| .ops = &max8997_ldo_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| } |
| #define regulator_desc_buck(num) { \ |
| .name = "BUCK"#num, \ |
| .id = MAX8997_BUCK##num, \ |
| .ops = &max8997_buck_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| } |
| |
| static struct regulator_desc regulators[] = { |
| regulator_desc_ldo(1), |
| regulator_desc_ldo(2), |
| regulator_desc_ldo(3), |
| regulator_desc_ldo(4), |
| regulator_desc_ldo(5), |
| regulator_desc_ldo(6), |
| regulator_desc_ldo(7), |
| regulator_desc_ldo(8), |
| regulator_desc_ldo(9), |
| regulator_desc_ldo(10), |
| regulator_desc_ldo(11), |
| regulator_desc_ldo(12), |
| regulator_desc_ldo(13), |
| regulator_desc_ldo(14), |
| regulator_desc_ldo(15), |
| regulator_desc_ldo(16), |
| regulator_desc_ldo(17), |
| regulator_desc_ldo(18), |
| regulator_desc_ldo(21), |
| regulator_desc_buck(1), |
| regulator_desc_buck(2), |
| regulator_desc_buck(3), |
| regulator_desc_buck(4), |
| regulator_desc_buck(5), |
| { |
| .name = "BUCK6", |
| .id = MAX8997_BUCK6, |
| .ops = &max8997_fixedvolt_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, |
| regulator_desc_buck(7), |
| { |
| .name = "EN32KHz AP", |
| .id = MAX8997_EN32KHZ_AP, |
| .ops = &max8997_fixedvolt_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "EN32KHz CP", |
| .id = MAX8997_EN32KHZ_CP, |
| .ops = &max8997_fixedvolt_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "ENVICHG", |
| .id = MAX8997_ENVICHG, |
| .ops = &max8997_fixedvolt_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "ESAFEOUT1", |
| .id = MAX8997_ESAFEOUT1, |
| .ops = &max8997_safeout_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "ESAFEOUT2", |
| .id = MAX8997_ESAFEOUT2, |
| .ops = &max8997_safeout_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "CHARGER CV", |
| .id = MAX8997_CHARGER_CV, |
| .ops = &max8997_fixedstate_ops, |
| .type = REGULATOR_VOLTAGE, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "CHARGER", |
| .id = MAX8997_CHARGER, |
| .ops = &max8997_charger_ops, |
| .type = REGULATOR_CURRENT, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "CHARGER TOPOFF", |
| .id = MAX8997_CHARGER_TOPOFF, |
| .ops = &max8997_charger_fixedstate_ops, |
| .type = REGULATOR_CURRENT, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static __devinit int max8997_pmic_probe(struct platform_device *pdev) |
| { |
| struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
| struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev); |
| struct regulator_dev **rdev; |
| struct max8997_data *max8997; |
| struct i2c_client *i2c; |
| int i, ret, size; |
| u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
| |
| if (!pdata) { |
| dev_err(pdev->dev.parent, "No platform init data supplied.\n"); |
| return -ENODEV; |
| } |
| |
| max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL); |
| if (!max8997) |
| return -ENOMEM; |
| |
| size = sizeof(struct regulator_dev *) * pdata->num_regulators; |
| max8997->rdev = kzalloc(size, GFP_KERNEL); |
| if (!max8997->rdev) { |
| kfree(max8997); |
| return -ENOMEM; |
| } |
| |
| rdev = max8997->rdev; |
| 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; |
| memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); |
| max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; |
| |
| for (i = 0; i < 8; i++) { |
| max8997->buck1_vol[i] = ret = |
| max8997_get_voltage_proper_val( |
| &buck1245_voltage_map_desc, |
| pdata->buck1_voltage[i] / 1000, |
| pdata->buck1_voltage[i] / 1000 + |
| buck1245_voltage_map_desc.step); |
| if (ret < 0) |
| goto err_alloc; |
| |
| max8997->buck2_vol[i] = ret = |
| max8997_get_voltage_proper_val( |
| &buck1245_voltage_map_desc, |
| pdata->buck2_voltage[i] / 1000, |
| pdata->buck2_voltage[i] / 1000 + |
| buck1245_voltage_map_desc.step); |
| if (ret < 0) |
| goto err_alloc; |
| |
| max8997->buck5_vol[i] = ret = |
| max8997_get_voltage_proper_val( |
| &buck1245_voltage_map_desc, |
| pdata->buck5_voltage[i] / 1000, |
| pdata->buck5_voltage[i] / 1000 + |
| buck1245_voltage_map_desc.step); |
| if (ret < 0) |
| goto err_alloc; |
| |
| 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); |
| } |
| |
| /* |
| * 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) { |
| bool gpio1set = false, gpio2set = false; |
| |
| if (!gpio_is_valid(pdata->buck125_gpios[0]) || |
| !gpio_is_valid(pdata->buck125_gpios[1]) || |
| !gpio_is_valid(pdata->buck125_gpios[2])) { |
| dev_err(&pdev->dev, "GPIO NOT VALID\n"); |
| ret = -EINVAL; |
| goto err_alloc; |
| } |
| |
| ret = gpio_request(pdata->buck125_gpios[0], |
| "MAX8997 SET1"); |
| if (ret == -EBUSY) |
| dev_warn(&pdev->dev, "Duplicated gpio request" |
| " on SET1\n"); |
| else if (ret) |
| goto err_alloc; |
| else |
| gpio1set = true; |
| |
| ret = gpio_request(pdata->buck125_gpios[1], |
| "MAX8997 SET2"); |
| if (ret == -EBUSY) |
| dev_warn(&pdev->dev, "Duplicated gpio request" |
| " on SET2\n"); |
| else if (ret) { |
| if (gpio1set) |
| gpio_free(pdata->buck125_gpios[0]); |
| goto err_alloc; |
| } else |
| gpio2set = true; |
| |
| ret = gpio_request(pdata->buck125_gpios[2], |
| "MAX8997 SET3"); |
| if (ret == -EBUSY) |
| dev_warn(&pdev->dev, "Duplicated gpio request" |
| " on SET3\n"); |
| else if (ret) { |
| if (gpio1set) |
| gpio_free(pdata->buck125_gpios[0]); |
| if (gpio2set) |
| gpio_free(pdata->buck125_gpios[1]); |
| goto err_alloc; |
| } |
| |
| gpio_direction_output(pdata->buck125_gpios[0], |
| (max8997->buck125_gpioindex >> 2) |
| & 0x1); /* SET1 */ |
| gpio_direction_output(pdata->buck125_gpios[1], |
| (max8997->buck125_gpioindex >> 1) |
| & 0x1); /* SET2 */ |
| gpio_direction_output(pdata->buck125_gpios[2], |
| (max8997->buck125_gpioindex >> 0) |
| & 0x1); /* SET3 */ |
| ret = 0; |
| } |
| |
| /* 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); |
| |
| /* Initialize all the DVS related BUCK registers */ |
| for (i = 0; i < 8; 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); |
| } |
| |
| /* 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].n_voltages = 4; |
| else if (id == MAX8997_CHARGER_CV) |
| regulators[id].n_voltages = 16; |
| |
| rdev[i] = regulator_register(®ulators[id], max8997->dev, |
| pdata->regulators[i].initdata, max8997); |
| if (IS_ERR(rdev[i])) { |
| ret = PTR_ERR(rdev[i]); |
| dev_err(max8997->dev, "regulator init failed for %d\n", |
| id); |
| rdev[i] = NULL; |
| goto err; |
| } |
| } |
| |
| return 0; |
| err: |
| for (i = 0; i < max8997->num_regulators; i++) |
| if (rdev[i]) |
| regulator_unregister(rdev[i]); |
| err_alloc: |
| kfree(max8997->rdev); |
| kfree(max8997); |
| |
| return ret; |
| } |
| |
| static int __devexit max8997_pmic_remove(struct platform_device *pdev) |
| { |
| struct max8997_data *max8997 = platform_get_drvdata(pdev); |
| struct regulator_dev **rdev = max8997->rdev; |
| int i; |
| |
| for (i = 0; i < max8997->num_regulators; i++) |
| if (rdev[i]) |
| regulator_unregister(rdev[i]); |
| |
| kfree(max8997->rdev); |
| kfree(max8997); |
| |
| 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", |
| .owner = THIS_MODULE, |
| }, |
| .probe = max8997_pmic_probe, |
| .remove = __devexit_p(max8997_pmic_remove), |
| .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 <myungjoo.ham@samsung.com>"); |
| MODULE_LICENSE("GPL"); |