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394 lines
11 KiB
394 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// Copyright (c) 2013 Samsung Electronics Co., Ltd |
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// http://www.samsung.com |
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#include <linux/bug.h> |
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#include <linux/err.h> |
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#include <linux/gpio.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/regmap.h> |
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#include <linux/platform_device.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/mfd/samsung/core.h> |
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#include <linux/mfd/samsung/s2mpa01.h> |
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struct s2mpa01_info { |
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int ramp_delay24; |
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int ramp_delay3; |
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int ramp_delay5; |
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int ramp_delay16; |
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int ramp_delay7; |
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int ramp_delay8910; |
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}; |
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static int get_ramp_delay(int ramp_delay) |
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{ |
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unsigned char cnt = 0; |
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ramp_delay /= 6250; |
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while (true) { |
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ramp_delay = ramp_delay >> 1; |
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if (ramp_delay == 0) |
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break; |
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cnt++; |
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} |
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if (cnt > 3) |
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cnt = 3; |
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return cnt; |
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} |
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static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev, |
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unsigned int old_selector, |
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unsigned int new_selector) |
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{ |
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struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); |
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unsigned int ramp_delay = 0; |
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int old_volt, new_volt; |
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switch (rdev_get_id(rdev)) { |
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case S2MPA01_BUCK2: |
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case S2MPA01_BUCK4: |
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ramp_delay = s2mpa01->ramp_delay24; |
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break; |
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case S2MPA01_BUCK3: |
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ramp_delay = s2mpa01->ramp_delay3; |
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break; |
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case S2MPA01_BUCK5: |
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ramp_delay = s2mpa01->ramp_delay5; |
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break; |
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case S2MPA01_BUCK1: |
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case S2MPA01_BUCK6: |
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ramp_delay = s2mpa01->ramp_delay16; |
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break; |
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case S2MPA01_BUCK7: |
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ramp_delay = s2mpa01->ramp_delay7; |
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break; |
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case S2MPA01_BUCK8: |
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case S2MPA01_BUCK9: |
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case S2MPA01_BUCK10: |
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ramp_delay = s2mpa01->ramp_delay8910; |
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break; |
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} |
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if (ramp_delay == 0) |
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ramp_delay = rdev->desc->ramp_delay; |
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old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector); |
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new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector); |
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return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay); |
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} |
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static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) |
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{ |
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struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); |
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unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2; |
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unsigned int ramp_enable = 1, enable_shift = 0; |
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int ret; |
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switch (rdev_get_id(rdev)) { |
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case S2MPA01_BUCK1: |
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enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT; |
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if (!ramp_delay) { |
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ramp_enable = 0; |
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break; |
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} |
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if (ramp_delay > s2mpa01->ramp_delay16) |
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s2mpa01->ramp_delay16 = ramp_delay; |
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else |
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ramp_delay = s2mpa01->ramp_delay16; |
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ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; |
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break; |
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case S2MPA01_BUCK2: |
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enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT; |
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if (!ramp_delay) { |
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ramp_enable = 0; |
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break; |
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} |
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if (ramp_delay > s2mpa01->ramp_delay24) |
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s2mpa01->ramp_delay24 = ramp_delay; |
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else |
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ramp_delay = s2mpa01->ramp_delay24; |
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ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; |
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ramp_reg = S2MPA01_REG_RAMP1; |
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break; |
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case S2MPA01_BUCK3: |
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enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT; |
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if (!ramp_delay) { |
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ramp_enable = 0; |
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break; |
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} |
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s2mpa01->ramp_delay3 = ramp_delay; |
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ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT; |
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ramp_reg = S2MPA01_REG_RAMP1; |
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break; |
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case S2MPA01_BUCK4: |
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enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT; |
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if (!ramp_delay) { |
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ramp_enable = 0; |
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break; |
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} |
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if (ramp_delay > s2mpa01->ramp_delay24) |
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s2mpa01->ramp_delay24 = ramp_delay; |
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else |
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ramp_delay = s2mpa01->ramp_delay24; |
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ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; |
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ramp_reg = S2MPA01_REG_RAMP1; |
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break; |
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case S2MPA01_BUCK5: |
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s2mpa01->ramp_delay5 = ramp_delay; |
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ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT; |
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break; |
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case S2MPA01_BUCK6: |
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if (ramp_delay > s2mpa01->ramp_delay16) |
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s2mpa01->ramp_delay16 = ramp_delay; |
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else |
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ramp_delay = s2mpa01->ramp_delay16; |
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ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; |
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break; |
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case S2MPA01_BUCK7: |
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s2mpa01->ramp_delay7 = ramp_delay; |
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ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT; |
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break; |
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case S2MPA01_BUCK8: |
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case S2MPA01_BUCK9: |
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case S2MPA01_BUCK10: |
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if (ramp_delay > s2mpa01->ramp_delay8910) |
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s2mpa01->ramp_delay8910 = ramp_delay; |
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else |
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ramp_delay = s2mpa01->ramp_delay8910; |
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ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT; |
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break; |
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default: |
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return 0; |
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} |
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if (!ramp_enable) |
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goto ramp_disable; |
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/* Ramp delay can be enabled/disabled only for buck[1234] */ |
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if (rdev_get_id(rdev) >= S2MPA01_BUCK1 && |
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rdev_get_id(rdev) <= S2MPA01_BUCK4) { |
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ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, |
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1 << enable_shift, 1 << enable_shift); |
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if (ret) { |
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dev_err(&rdev->dev, "failed to enable ramp rate\n"); |
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return ret; |
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} |
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} |
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ramp_val = get_ramp_delay(ramp_delay); |
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return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift, |
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ramp_val << ramp_shift); |
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ramp_disable: |
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return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, |
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1 << enable_shift, 0); |
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} |
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static const struct regulator_ops s2mpa01_ldo_ops = { |
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.list_voltage = regulator_list_voltage_linear, |
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.map_voltage = regulator_map_voltage_linear, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.set_voltage_time_sel = regulator_set_voltage_time_sel, |
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}; |
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static const struct regulator_ops s2mpa01_buck_ops = { |
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.list_voltage = regulator_list_voltage_linear, |
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.map_voltage = regulator_map_voltage_linear, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel, |
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.set_ramp_delay = s2mpa01_set_ramp_delay, |
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}; |
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#define regulator_desc_ldo(num, step) { \ |
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.name = "LDO"#num, \ |
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.of_match = of_match_ptr("LDO"#num), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.id = S2MPA01_LDO##num, \ |
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.ops = &s2mpa01_ldo_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.min_uV = MIN_800_MV, \ |
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.uV_step = step, \ |
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.n_voltages = S2MPA01_LDO_N_VOLTAGES, \ |
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.vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \ |
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.vsel_mask = S2MPA01_LDO_VSEL_MASK, \ |
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.enable_reg = S2MPA01_REG_L1CTRL + num - 1, \ |
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.enable_mask = S2MPA01_ENABLE_MASK \ |
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} |
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#define regulator_desc_buck1_4(num) { \ |
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.name = "BUCK"#num, \ |
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.of_match = of_match_ptr("BUCK"#num), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.id = S2MPA01_BUCK##num, \ |
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.ops = &s2mpa01_buck_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.min_uV = MIN_600_MV, \ |
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.uV_step = STEP_6_25_MV, \ |
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
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.ramp_delay = S2MPA01_RAMP_DELAY, \ |
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.vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \ |
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ |
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.enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \ |
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.enable_mask = S2MPA01_ENABLE_MASK \ |
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} |
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#define regulator_desc_buck5 { \ |
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.name = "BUCK5", \ |
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.of_match = of_match_ptr("BUCK5"), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.id = S2MPA01_BUCK5, \ |
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.ops = &s2mpa01_buck_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.min_uV = MIN_800_MV, \ |
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.uV_step = STEP_6_25_MV, \ |
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
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.ramp_delay = S2MPA01_RAMP_DELAY, \ |
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.vsel_reg = S2MPA01_REG_B5CTRL2, \ |
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ |
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.enable_reg = S2MPA01_REG_B5CTRL1, \ |
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.enable_mask = S2MPA01_ENABLE_MASK \ |
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} |
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#define regulator_desc_buck6_10(num, min, step) { \ |
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.name = "BUCK"#num, \ |
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.of_match = of_match_ptr("BUCK"#num), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.id = S2MPA01_BUCK##num, \ |
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.ops = &s2mpa01_buck_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.min_uV = min, \ |
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.uV_step = step, \ |
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
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.ramp_delay = S2MPA01_RAMP_DELAY, \ |
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.vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \ |
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ |
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.enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \ |
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.enable_mask = S2MPA01_ENABLE_MASK \ |
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} |
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static const struct regulator_desc regulators[] = { |
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regulator_desc_ldo(1, STEP_25_MV), |
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regulator_desc_ldo(2, STEP_50_MV), |
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regulator_desc_ldo(3, STEP_50_MV), |
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regulator_desc_ldo(4, STEP_50_MV), |
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regulator_desc_ldo(5, STEP_25_MV), |
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regulator_desc_ldo(6, STEP_25_MV), |
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regulator_desc_ldo(7, STEP_50_MV), |
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regulator_desc_ldo(8, STEP_50_MV), |
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regulator_desc_ldo(9, STEP_50_MV), |
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regulator_desc_ldo(10, STEP_50_MV), |
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regulator_desc_ldo(11, STEP_50_MV), |
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regulator_desc_ldo(12, STEP_50_MV), |
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regulator_desc_ldo(13, STEP_50_MV), |
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regulator_desc_ldo(14, STEP_50_MV), |
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regulator_desc_ldo(15, STEP_50_MV), |
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regulator_desc_ldo(16, STEP_50_MV), |
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regulator_desc_ldo(17, STEP_50_MV), |
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regulator_desc_ldo(18, STEP_50_MV), |
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regulator_desc_ldo(19, STEP_50_MV), |
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regulator_desc_ldo(20, STEP_50_MV), |
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regulator_desc_ldo(21, STEP_50_MV), |
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regulator_desc_ldo(22, STEP_50_MV), |
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regulator_desc_ldo(23, STEP_50_MV), |
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regulator_desc_ldo(24, STEP_50_MV), |
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regulator_desc_ldo(25, STEP_50_MV), |
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regulator_desc_ldo(26, STEP_25_MV), |
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regulator_desc_buck1_4(1), |
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regulator_desc_buck1_4(2), |
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regulator_desc_buck1_4(3), |
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regulator_desc_buck1_4(4), |
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regulator_desc_buck5, |
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regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV), |
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regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV), |
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regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV), |
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regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV), |
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regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV), |
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}; |
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static int s2mpa01_pmic_probe(struct platform_device *pdev) |
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{ |
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struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
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struct sec_platform_data *pdata = dev_get_platdata(iodev->dev); |
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struct regulator_config config = { }; |
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struct s2mpa01_info *s2mpa01; |
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int i; |
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s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL); |
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if (!s2mpa01) |
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return -ENOMEM; |
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config.dev = iodev->dev; |
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config.regmap = iodev->regmap_pmic; |
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config.driver_data = s2mpa01; |
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for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) { |
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struct regulator_dev *rdev; |
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if (pdata) |
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config.init_data = pdata->regulators[i].initdata; |
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rdev = devm_regulator_register(&pdev->dev, |
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®ulators[i], &config); |
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if (IS_ERR(rdev)) { |
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dev_err(&pdev->dev, "regulator init failed for %d\n", |
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i); |
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return PTR_ERR(rdev); |
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} |
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} |
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return 0; |
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} |
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static const struct platform_device_id s2mpa01_pmic_id[] = { |
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{ "s2mpa01-pmic", 0}, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id); |
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static struct platform_driver s2mpa01_pmic_driver = { |
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.driver = { |
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.name = "s2mpa01-pmic", |
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}, |
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.probe = s2mpa01_pmic_probe, |
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.id_table = s2mpa01_pmic_id, |
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}; |
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module_platform_driver(s2mpa01_pmic_driver); |
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/* Module information */ |
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MODULE_AUTHOR("Sangbeom Kim <[email protected]>"); |
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MODULE_AUTHOR("Sachin Kamat <[email protected]>"); |
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MODULE_DESCRIPTION("Samsung S2MPA01 Regulator Driver"); |
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MODULE_LICENSE("GPL");
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