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drivers/regulator/max8997-regulator.c
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// SPDX-License-Identifier: GPL-2.0+ // // max8997.c - Regulator driver for the Maxim 8997/8966 // // Copyright (C) 2011 Samsung Electronics // MyungJoo Ham <myungjoo.ham@samsung.com> // // This driver is based on max8998.c |
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#include <linux/bug.h> |
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#include <linux/err.h> #include <linux/gpio.h> |
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#include <linux/of_gpio.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#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> |
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#include <linux/regulator/of_regulator.h> |
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struct max8997_data { struct device *dev; struct max8997_dev *iodev; int num_regulators; |
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int ramp_delay; /* in mV/us */ |
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bool buck1_gpiodvs; bool buck2_gpiodvs; bool buck5_gpiodvs; |
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u8 buck1_vol[8]; u8 buck2_vol[8]; u8 buck5_vol[8]; |
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int buck125_gpios[3]; |
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int buck125_gpioindex; |
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bool ignore_gpiodvs_side_effect; |
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u8 saved_states[MAX8997_REG_MAX]; }; |
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static const unsigned int safeoutvolt[] = { 4850000, 4900000, 4950000, 3300000, }; |
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static inline void max8997_set_gpio(struct max8997_data *max8997) { |
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int set3 = (max8997->buck125_gpioindex) & 0x1; int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; |
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gpio_set_value(max8997->buck125_gpios[0], set1); gpio_set_value(max8997->buck125_gpios[1], set2); gpio_set_value(max8997->buck125_gpios[2], set3); |
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} struct voltage_map_desc { int min; int max; int step; |
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}; |
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/* Voltage maps in uV */ |
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static const struct voltage_map_desc ldo_voltage_map_desc = { |
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.min = 800000, .max = 3950000, .step = 50000, |
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}; /* LDO1 ~ 18, 21 all */ static const struct voltage_map_desc buck1245_voltage_map_desc = { |
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.min = 650000, .max = 2225000, .step = 25000, |
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}; /* Buck1, 2, 4, 5 */ static const struct voltage_map_desc buck37_voltage_map_desc = { |
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.min = 750000, .max = 3900000, .step = 50000, |
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}; /* Buck3, 7 */ |
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/* current map in uA */ |
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static const struct voltage_map_desc charger_current_map_desc = { |
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.min = 200000, .max = 950000, .step = 50000, |
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}; static const struct voltage_map_desc topoff_current_map_desc = { |
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.min = 50000, .max = 200000, .step = 10000, |
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}; 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, }; |
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static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, unsigned int selector) { |
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int rid = rdev_get_id(rdev); |
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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; |
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int rid = rdev_get_id(rdev); |
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int val; |
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if (rid < 0 || rid >= ARRAY_SIZE(reg_voltage_map)) |
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return -EINVAL; desc = reg_voltage_map[rid]; if (desc == NULL) return -EINVAL; val = desc->min + desc->step * selector; if (val > desc->max) return -EINVAL; |
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return val; |
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} static int max8997_get_enable_register(struct regulator_dev *rdev, int *reg, int *mask, int *pattern) { |
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int rid = rdev_get_id(rdev); |
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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; |
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} 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); |
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if (ret) |
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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) { |
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struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
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int rid = rdev_get_id(rdev); |
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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; |
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if (max8997->buck1_gpiodvs) reg += max8997->buck125_gpioindex; |
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break; case MAX8997_BUCK2: reg = MAX8997_REG_BUCK2DVS1; |
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if (max8997->buck2_gpiodvs) reg += max8997->buck125_gpioindex; |
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break; case MAX8997_BUCK3: reg = MAX8997_REG_BUCK3DVS; break; case MAX8997_BUCK4: reg = MAX8997_REG_BUCK4DVS; break; case MAX8997_BUCK5: reg = MAX8997_REG_BUCK5DVS1; |
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if (max8997->buck5_gpiodvs) reg += max8997->buck125_gpioindex; |
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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; } |
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static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
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{ struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
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struct i2c_client *i2c = max8997->iodev->i2c; int reg, shift, mask, ret; |
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u8 val; ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; |
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ret = max8997_read_reg(i2c, reg, &val); if (ret) return ret; val >>= shift; val &= mask; |
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return val; |
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} static inline int max8997_get_voltage_proper_val( const struct voltage_map_desc *desc, int min_vol, int max_vol) { |
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int i; |
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if (desc == NULL) return -EINVAL; if (max_vol < desc->min || min_vol > desc->max) return -EINVAL; |
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if (min_vol < desc->min) min_vol = desc->min; |
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i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
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if (desc->min + desc->step * i > max_vol) |
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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; |
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int rid = rdev_get_id(rdev); |
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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; |
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if (min_uV <= 4000000) val = 0x1; else if (min_uV <= 4200000 && max_uV >= 4200000) |
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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; |
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const struct voltage_map_desc *desc; |
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int rid = rdev_get_id(rdev); |
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int i, reg, shift, mask, ret; |
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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]; |
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i = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
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if (i < 0) return i; ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; |
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ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); *selector = i; |
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return ret; } |
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static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
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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; |
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} |
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switch (rid) { case MAX8997_BUCK1: case MAX8997_BUCK2: case MAX8997_BUCK4: case MAX8997_BUCK5: return DIV_ROUND_UP(desc->step * (new_selector - old_selector), |
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max8997->ramp_delay * 1000); |
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} |
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return 0; |
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} /* * 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); |
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int rid = rdev_get_id(rdev); |
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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; |
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buckx_gpiodvs[0] = max8997->buck1_gpiodvs; buckx_gpiodvs[1] = max8997->buck2_gpiodvs; buckx_gpiodvs[2] = max8997->buck5_gpiodvs; |
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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); |
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int rid = rdev_get_id(rdev); |
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const struct voltage_map_desc *desc; int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; bool gpio_dvs_mode = false; |
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if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) return -EINVAL; switch (rid) { case MAX8997_BUCK1: |
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if (max8997->buck1_gpiodvs) |
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gpio_dvs_mode = true; break; case MAX8997_BUCK2: |
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if (max8997->buck2_gpiodvs) |
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gpio_dvs_mode = true; break; case MAX8997_BUCK5: |
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if (max8997->buck5_gpiodvs) |
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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]; |
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new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
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628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 |
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++; |
f55205f4d
|
646 |
} while (desc->min + desc->step * new_val <= desc->max); |
bd6ca2cf5
|
647 648 649 |
new_idx = tmp_idx; new_val = tmp_val; |
6e0414a5c
|
650 |
if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf5
|
651 |
return -EINVAL; |
c4e3b1442
|
652 653 654 655 |
dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET: %d -> %d ", max8997->buck125_gpioindex, tmp_idx); |
bd6ca2cf5
|
656 657 658 659 660 661 662 663 664 665 666 |
out: if (new_idx < 0 || new_val < 0) return -EINVAL; max8997->buck125_gpioindex = new_idx; max8997_set_gpio(max8997); *selector = new_val; return 0; } |
bd6ca2cf5
|
667 |
/* For SAFEOUT1 and SAFEOUT2 */ |
b79ca051b
|
668 669 |
static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, unsigned selector) |
bd6ca2cf5
|
670 671 672 |
{ struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; |
b3e1348e2
|
673 |
int rid = rdev_get_id(rdev); |
bd6ca2cf5
|
674 |
int reg, shift = 0, mask, ret; |
bd6ca2cf5
|
675 676 677 |
if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) return -EINVAL; |
bd6ca2cf5
|
678 679 680 |
ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); if (ret) return ret; |
b79ca051b
|
681 |
return max8997_update_reg(i2c, reg, selector << shift, mask << shift); |
bd6ca2cf5
|
682 |
} |
bd6ca2cf5
|
683 684 685 686 687 |
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; |
b3e1348e2
|
688 |
int rid = rdev_get_id(rdev); |
bd6ca2cf5
|
689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 |
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 ", rdev->desc->name); return max8997_update_reg(i2c, reg, 0x40, mask); } dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh) ", rdev->desc->name, max8997->saved_states[rid] & mask, (~pattern) & mask); return max8997_update_reg(i2c, reg, ~pattern, mask); } |
9ed84d24d
|
711 |
static const struct regulator_ops max8997_ldo_ops = { |
bd6ca2cf5
|
712 713 714 715 |
.list_voltage = max8997_list_voltage, .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, |
9e96b3a7a
|
716 |
.get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf5
|
717 |
.set_voltage = max8997_set_voltage_ldobuck, |
bd6ca2cf5
|
718 719 |
.set_suspend_disable = max8997_reg_disable_suspend, }; |
9ed84d24d
|
720 |
static const struct regulator_ops max8997_buck_ops = { |
bd6ca2cf5
|
721 722 723 724 |
.list_voltage = max8997_list_voltage, .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, |
9e96b3a7a
|
725 |
.get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf5
|
726 |
.set_voltage = max8997_set_voltage_buck, |
24bd41090
|
727 |
.set_voltage_time_sel = max8997_set_voltage_buck_time_sel, |
bd6ca2cf5
|
728 729 |
.set_suspend_disable = max8997_reg_disable_suspend, }; |
9ed84d24d
|
730 |
static const struct regulator_ops max8997_fixedvolt_ops = { |
bd6ca2cf5
|
731 732 733 734 |
.list_voltage = max8997_list_voltage, .is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, |
bd6ca2cf5
|
735 736 |
.set_suspend_disable = max8997_reg_disable_suspend, }; |
9ed84d24d
|
737 |
static const struct regulator_ops max8997_safeout_ops = { |
b79ca051b
|
738 |
.list_voltage = regulator_list_voltage_table, |
bd6ca2cf5
|
739 740 741 |
.is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, |
9e96b3a7a
|
742 |
.get_voltage_sel = max8997_get_voltage_sel, |
b79ca051b
|
743 |
.set_voltage_sel = max8997_set_voltage_safeout_sel, |
bd6ca2cf5
|
744 745 |
.set_suspend_disable = max8997_reg_disable_suspend, }; |
9ed84d24d
|
746 |
static const struct regulator_ops max8997_fixedstate_ops = { |
bd6ca2cf5
|
747 |
.list_voltage = max8997_list_voltage_charger_cv, |
9e96b3a7a
|
748 |
.get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf5
|
749 750 |
.set_voltage = max8997_set_voltage_charger_cv, }; |
9e96b3a7a
|
751 752 |
static int max8997_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) |
bd6ca2cf5
|
753 754 |
{ unsigned dummy; |
9e96b3a7a
|
755 |
int rid = rdev_get_id(rdev); |
bd6ca2cf5
|
756 |
|
9e96b3a7a
|
757 758 |
if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) return -EINVAL; |
bd6ca2cf5
|
759 |
|
9e96b3a7a
|
760 761 |
/* Reuse max8997_set_voltage_ldobuck to set current_limit. */ return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); |
bd6ca2cf5
|
762 |
} |
9e96b3a7a
|
763 764 765 766 767 768 769 770 771 772 773 774 775 776 |
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); } |
bd6ca2cf5
|
777 |
|
9ed84d24d
|
778 |
static const struct regulator_ops max8997_charger_ops = { |
bd6ca2cf5
|
779 780 781 |
.is_enabled = max8997_reg_is_enabled, .enable = max8997_reg_enable, .disable = max8997_reg_disable, |
9e96b3a7a
|
782 783 |
.get_current_limit = max8997_get_current_limit, .set_current_limit = max8997_set_current_limit, |
bd6ca2cf5
|
784 |
}; |
9ed84d24d
|
785 |
static const struct regulator_ops max8997_charger_fixedstate_ops = { |
9e96b3a7a
|
786 787 |
.get_current_limit = max8997_get_current_limit, .set_current_limit = max8997_set_current_limit, |
bd6ca2cf5
|
788 |
}; |
4533f80ef
|
789 790 791 792 |
#define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ .name = #_name, \ .id = MAX8997_##_name, \ .ops = &_ops, \ |
bd6ca2cf5
|
793 794 795 |
.type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ } |
4533f80ef
|
796 797 798 799 800 801 |
#define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ .name = #_name, \ .id = MAX8997_##_name, \ .ops = &_ops, \ .type = REGULATOR_CURRENT, \ |
bd6ca2cf5
|
802 803 804 805 |
.owner = THIS_MODULE, \ } static struct regulator_desc regulators[] = { |
4533f80ef
|
806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 |
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), |
bd6ca2cf5
|
841 |
}; |
77b71b370
|
842 |
#ifdef CONFIG_OF |
b4895e2ca
|
843 |
static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev, |
77b71b370
|
844 845 846 847 848 849 850 851 852 |
struct max8997_platform_data *pdata, struct device_node *pmic_np) { int i, gpio; for (i = 0; i < 3; i++) { gpio = of_get_named_gpio(pmic_np, "max8997,pmic-buck125-dvs-gpios", i); if (!gpio_is_valid(gpio)) { |
b4895e2ca
|
853 854 |
dev_err(&pdev->dev, "invalid gpio[%d]: %d ", i, gpio); |
77b71b370
|
855 856 857 858 859 860 |
return -EINVAL; } pdata->buck125_gpios[i] = gpio; } return 0; } |
b4895e2ca
|
861 |
static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
77b71b370
|
862 863 |
struct max8997_platform_data *pdata) { |
b4895e2ca
|
864 |
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
77b71b370
|
865 866 867 |
struct device_node *pmic_np, *regulators_np, *reg_np; struct max8997_regulator_data *rdata; unsigned int i, dvs_voltage_nr = 1, ret; |
b8b27a44d
|
868 |
pmic_np = iodev->dev->of_node; |
77b71b370
|
869 |
if (!pmic_np) { |
b4895e2ca
|
870 871 |
dev_err(&pdev->dev, "could not find pmic sub-node "); |
77b71b370
|
872 873 |
return -ENODEV; } |
c0a353631
|
874 |
regulators_np = of_get_child_by_name(pmic_np, "regulators"); |
77b71b370
|
875 |
if (!regulators_np) { |
b4895e2ca
|
876 877 |
dev_err(&pdev->dev, "could not find regulators sub-node "); |
77b71b370
|
878 879 880 881 |
return -EINVAL; } /* count the number of regulators to be supported in pmic */ |
ee70b2584
|
882 |
pdata->num_regulators = of_get_child_count(regulators_np); |
77b71b370
|
883 |
|
a86854d0c
|
884 885 886 |
rdata = devm_kcalloc(&pdev->dev, pdata->num_regulators, sizeof(*rdata), GFP_KERNEL); |
77b71b370
|
887 |
if (!rdata) { |
c92f5dd2c
|
888 |
of_node_put(regulators_np); |
77b71b370
|
889 890 891 892 893 894 |
return -ENOMEM; } pdata->regulators = rdata; for_each_child_of_node(regulators_np, reg_np) { for (i = 0; i < ARRAY_SIZE(regulators); i++) |
c32569e35
|
895 |
if (of_node_name_eq(reg_np, regulators[i].name)) |
77b71b370
|
896 897 898 |
break; if (i == ARRAY_SIZE(regulators)) { |
0c9721a5d
|
899 900 901 |
dev_warn(&pdev->dev, "don't know how to configure regulator %pOFn ", reg_np); |
77b71b370
|
902 903 904 905 |
continue; } rdata->id = i; |
b4895e2ca
|
906 |
rdata->initdata = of_get_regulator_init_data(&pdev->dev, |
072e78b12
|
907 908 |
reg_np, ®ulators[i]); |
77b71b370
|
909 910 911 |
rdata->reg_node = reg_np; rdata++; } |
c92f5dd2c
|
912 |
of_node_put(regulators_np); |
77b71b370
|
913 914 915 916 917 918 919 920 921 922 923 924 |
if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) pdata->buck1_gpiodvs = true; if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) pdata->buck2_gpiodvs = true; if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) pdata->buck5_gpiodvs = true; if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || pdata->buck5_gpiodvs) { |
b4895e2ca
|
925 |
ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np); |
77b71b370
|
926 927 928 929 930 931 932 933 934 935 |
if (ret) return -EINVAL; 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; |
b4895e2ca
|
936 937 |
dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead "); |
77b71b370
|
938 939 940 941 942 943 944 945 946 947 948 949 950 |
} } if (of_get_property(pmic_np, "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) pdata->ignore_gpiodvs_side_effect = true; dvs_voltage_nr = 8; } if (of_property_read_u32_array(pmic_np, "max8997,pmic-buck1-dvs-voltage", pdata->buck1_voltage, dvs_voltage_nr)) { |
b4895e2ca
|
951 952 |
dev_err(&pdev->dev, "buck1 voltages not specified "); |
77b71b370
|
953 954 955 956 957 958 |
return -EINVAL; } if (of_property_read_u32_array(pmic_np, "max8997,pmic-buck2-dvs-voltage", pdata->buck2_voltage, dvs_voltage_nr)) { |
b4895e2ca
|
959 960 |
dev_err(&pdev->dev, "buck2 voltages not specified "); |
77b71b370
|
961 962 963 964 965 966 |
return -EINVAL; } if (of_property_read_u32_array(pmic_np, "max8997,pmic-buck5-dvs-voltage", pdata->buck5_voltage, dvs_voltage_nr)) { |
b4895e2ca
|
967 968 |
dev_err(&pdev->dev, "buck5 voltages not specified "); |
77b71b370
|
969 970 971 972 973 974 |
return -EINVAL; } return 0; } #else |
b4895e2ca
|
975 |
static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
77b71b370
|
976 977 978 979 980 |
struct max8997_platform_data *pdata) { return 0; } #endif /* CONFIG_OF */ |
a5023574d
|
981 |
static int max8997_pmic_probe(struct platform_device *pdev) |
bd6ca2cf5
|
982 983 |
{ struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
77b71b370
|
984 |
struct max8997_platform_data *pdata = iodev->pdata; |
c172708d3
|
985 |
struct regulator_config config = { }; |
ad78bba42
|
986 |
struct regulator_dev *rdev; |
bd6ca2cf5
|
987 988 |
struct max8997_data *max8997; struct i2c_client *i2c; |
ad78bba42
|
989 |
int i, ret, nr_dvs; |
bd6ca2cf5
|
990 |
u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
a2f07305e
|
991 992 993 |
if (!pdata) { dev_err(&pdev->dev, "No platform init data supplied. "); |
bd6ca2cf5
|
994 995 |
return -ENODEV; } |
77b71b370
|
996 |
if (iodev->dev->of_node) { |
b4895e2ca
|
997 |
ret = max8997_pmic_dt_parse_pdata(pdev, pdata); |
77b71b370
|
998 999 1000 |
if (ret) return ret; } |
8ae5767ba
|
1001 1002 |
max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), GFP_KERNEL); |
bd6ca2cf5
|
1003 1004 |
if (!max8997) return -ENOMEM; |
bd6ca2cf5
|
1005 1006 1007 1008 1009 1010 1011 |
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; |
6e0414a5c
|
1012 1013 1014 1015 1016 |
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; |
bd6ca2cf5
|
1017 |
|
068a8c823
|
1018 1019 1020 1021 |
nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || pdata->buck5_gpiodvs) ? 8 : 1; for (i = 0; i < nr_dvs; i++) { |
bd6ca2cf5
|
1022 1023 1024 |
max8997->buck1_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, |
bc3b7756b
|
1025 1026 |
pdata->buck1_voltage[i], pdata->buck1_voltage[i] + |
bd6ca2cf5
|
1027 1028 |
buck1245_voltage_map_desc.step); if (ret < 0) |
4177f95b8
|
1029 |
return ret; |
bd6ca2cf5
|
1030 1031 1032 1033 |
max8997->buck2_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, |
bc3b7756b
|
1034 1035 |
pdata->buck2_voltage[i], pdata->buck2_voltage[i] + |
bd6ca2cf5
|
1036 1037 |
buck1245_voltage_map_desc.step); if (ret < 0) |
4177f95b8
|
1038 |
return ret; |
bd6ca2cf5
|
1039 1040 1041 1042 |
max8997->buck5_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, |
bc3b7756b
|
1043 1044 |
pdata->buck5_voltage[i], pdata->buck5_voltage[i] + |
bd6ca2cf5
|
1045 1046 |
buck1245_voltage_map_desc.step); if (ret < 0) |
4177f95b8
|
1047 |
return ret; |
bd6ca2cf5
|
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 |
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++) { |
ecb9c4f59
|
1059 |
max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf5
|
1060 |
max_buck1, 0x3f); |
ecb9c4f59
|
1061 |
max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf5
|
1062 |
max_buck2, 0x3f); |
ecb9c4f59
|
1063 |
max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf5
|
1064 1065 |
max_buck5, 0x3f); } |
11ec7bf00
|
1066 |
/* Initialize all the DVS related BUCK registers */ |
068a8c823
|
1067 |
for (i = 0; i < nr_dvs; i++) { |
11ec7bf00
|
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 |
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); } |
bd6ca2cf5
|
1078 1079 1080 1081 1082 1083 |
/* * 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) { |
bd6ca2cf5
|
1084 1085 1086 1087 1088 1089 |
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 "); |
4177f95b8
|
1090 |
return -EINVAL; |
bd6ca2cf5
|
1091 |
} |
8fa25eda8
|
1092 1093 1094 |
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], "MAX8997 SET1"); if (ret) |
4177f95b8
|
1095 |
return ret; |
8fa25eda8
|
1096 1097 1098 1099 |
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], "MAX8997 SET2"); if (ret) |
4177f95b8
|
1100 |
return ret; |
bd6ca2cf5
|
1101 |
|
8fa25eda8
|
1102 |
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
bd6ca2cf5
|
1103 |
"MAX8997 SET3"); |
8fa25eda8
|
1104 |
if (ret) |
4177f95b8
|
1105 |
return ret; |
bd6ca2cf5
|
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 |
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 */ |
bd6ca2cf5
|
1116 1117 1118 1119 1120 1121 1122 1123 1124 |
} /* 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); |
dbb48e7c3
|
1125 1126 1127 |
/* Misc Settings */ max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); |
bd6ca2cf5
|
1128 1129 1130 1131 1132 |
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]; |
b79ca051b
|
1133 |
if (desc) { |
bd6ca2cf5
|
1134 1135 |
regulators[id].n_voltages = (desc->max - desc->min) / desc->step + 1; |
b79ca051b
|
1136 1137 1138 1139 |
} 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) { |
bd6ca2cf5
|
1140 |
regulators[id].n_voltages = 16; |
b79ca051b
|
1141 |
} |
bd6ca2cf5
|
1142 |
|
c172708d3
|
1143 1144 1145 |
config.dev = max8997->dev; config.init_data = pdata->regulators[i].initdata; config.driver_data = max8997; |
77b71b370
|
1146 |
config.of_node = pdata->regulators[i].reg_node; |
c172708d3
|
1147 |
|
ad78bba42
|
1148 1149 1150 |
rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); if (IS_ERR(rdev)) { |
bd6ca2cf5
|
1151 1152 1153 |
dev_err(max8997->dev, "regulator init failed for %d ", id); |
ad78bba42
|
1154 |
return PTR_ERR(rdev); |
bd6ca2cf5
|
1155 1156 |
} } |
bd6ca2cf5
|
1157 |
return 0; |
bd6ca2cf5
|
1158 1159 1160 1161 1162 1163 |
} static const struct platform_device_id max8997_pmic_id[] = { { "max8997-pmic", 0}, { }, }; |
a51b907b2
|
1164 |
MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf5
|
1165 1166 1167 1168 |
static struct platform_driver max8997_pmic_driver = { .driver = { .name = "max8997-pmic", |
bd6ca2cf5
|
1169 1170 |
}, .probe = max8997_pmic_probe, |
bd6ca2cf5
|
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 |
.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"); |