548 lines
14 KiB
C
548 lines
14 KiB
C
/*
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* Regulators driver for Marvell 88PM8607
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*
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* Copyright (C) 2009 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/i2c.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/mfd/88pm860x.h>
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struct pm8607_regulator_info {
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struct regulator_desc desc;
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struct pm860x_chip *chip;
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struct regulator_dev *regulator;
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struct i2c_client *i2c;
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int min_uV;
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int max_uV;
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int step_uV;
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int vol_reg;
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int vol_shift;
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int vol_nbits;
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int update_reg;
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int update_bit;
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int enable_reg;
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int enable_bit;
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int slope_double;
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};
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static inline int check_range(struct pm8607_regulator_info *info,
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int min_uV, int max_uV)
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{
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if (max_uV < info->min_uV || min_uV > info->max_uV || min_uV > max_uV)
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return -EINVAL;
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return 0;
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}
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static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
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{
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struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
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int ret = -EINVAL;
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switch (info->desc.id) {
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case PM8607_ID_BUCK1:
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ret = (index < 0x1d) ? (index * 25000 + 800000) :
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((index < 0x20) ? 1500000 :
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((index < 0x40) ? ((index - 0x20) * 25000) :
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-EINVAL));
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break;
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case PM8607_ID_BUCK3:
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ret = (index < 0x3d) ? (index * 25000) :
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((index < 0x40) ? 1500000 : -EINVAL);
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if (ret < 0)
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break;
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if (info->slope_double)
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ret <<= 1;
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break;
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case PM8607_ID_LDO1:
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ret = (index == 0) ? 1800000 :
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((index == 1) ? 1200000 :
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((index == 2) ? 2800000 : -EINVAL));
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break;
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case PM8607_ID_LDO5:
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ret = (index == 0) ? 2900000 :
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((index == 1) ? 3000000 :
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((index == 2) ? 3100000 : 3300000));
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break;
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case PM8607_ID_LDO7:
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case PM8607_ID_LDO8:
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ret = (index < 3) ? (index * 50000 + 1800000) :
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((index < 8) ? (index * 50000 + 2550000) :
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-EINVAL);
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break;
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case PM8607_ID_LDO12:
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ret = (index < 2) ? (index * 100000 + 1800000) :
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((index < 7) ? (index * 100000 + 2500000) :
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((index == 7) ? 3300000 : 1200000));
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break;
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case PM8607_ID_LDO2:
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case PM8607_ID_LDO3:
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case PM8607_ID_LDO9:
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ret = (index < 3) ? (index * 50000 + 1800000) :
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((index < 7) ? (index * 50000 + 2550000) :
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3300000);
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break;
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case PM8607_ID_LDO4:
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ret = (index < 3) ? (index * 50000 + 1800000) :
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((index < 6) ? (index * 50000 + 2550000) :
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((index == 6) ? 2900000 : 3300000));
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break;
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case PM8607_ID_LDO6:
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ret = (index < 2) ? (index * 50000 + 1800000) :
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((index < 7) ? (index * 50000 + 2500000) :
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3300000);
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break;
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case PM8607_ID_LDO10:
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ret = (index < 3) ? (index * 50000 + 1800000) :
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((index < 7) ? (index * 50000 + 2550000) :
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((index == 7) ? 3300000 : 1200000));
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break;
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case PM8607_ID_LDO14:
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ret = (index < 2) ? (index * 50000 + 1800000) :
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((index < 7) ? (index * 50000 + 2600000) :
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3300000);
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break;
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}
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return ret;
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}
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static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
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{
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struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
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int val = -ENOENT;
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int ret;
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switch (info->desc.id) {
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case PM8607_ID_BUCK1:
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if (min_uV >= 800000) /* 800mV ~ 1500mV / 25mV */
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val = (min_uV - 775001) / 25000;
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else { /* 25mV ~ 775mV / 25mV */
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val = (min_uV + 249999) / 25000;
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val += 32;
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}
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break;
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case PM8607_ID_BUCK3:
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if (info->slope_double)
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min_uV = min_uV >> 1;
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val = (min_uV + 249999) / 25000; /* 0mV ~ 1500mV / 25mV */
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break;
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case PM8607_ID_LDO1:
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if (min_uV > 1800000)
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val = 2;
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else if (min_uV > 1200000)
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val = 0;
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else
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val = 1;
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break;
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case PM8607_ID_LDO5:
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if (min_uV > 3100000)
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val = 3;
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else /* 2900mV ~ 3100mV / 100mV */
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val = (min_uV - 2800001) / 100000;
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break;
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case PM8607_ID_LDO7:
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case PM8607_ID_LDO8:
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if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */
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if (min_uV <= 1800000)
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val = 0; /* 1800mv */
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else if (min_uV <= 1900000)
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val = (min_uV - 1750001) / 50000;
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else
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val = 3; /* 2700mV */
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} else { /* 2700mV ~ 2900mV / 50mV */
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if (min_uV <= 2900000) {
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val = (min_uV - 2650001) / 50000;
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val += 3;
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} else
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val = -EINVAL;
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}
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break;
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case PM8607_ID_LDO10:
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if (min_uV > 2850000)
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val = 7;
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else if (min_uV <= 1200000)
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val = 8;
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else if (min_uV < 2700000) /* 1800mV ~ 1900mV / 50mV */
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val = (min_uV - 1750001) / 50000;
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else { /* 2700mV ~ 2850mV / 50mV */
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val = (min_uV - 2650001) / 50000;
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val += 3;
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}
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break;
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case PM8607_ID_LDO12:
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if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 100mV */
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if (min_uV <= 1200000)
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val = 8; /* 1200mV */
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else if (min_uV <= 1800000)
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val = 0; /* 1800mV */
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else if (min_uV <= 1900000)
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val = (min_uV - 1700001) / 100000;
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else
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val = 2; /* 2700mV */
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} else { /* 2700mV ~ 3100mV / 100mV */
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if (min_uV <= 3100000) {
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val = (min_uV - 2600001) / 100000;
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val += 2;
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} else if (min_uV <= 3300000)
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val = 7;
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else
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val = -EINVAL;
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}
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break;
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case PM8607_ID_LDO2:
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case PM8607_ID_LDO3:
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case PM8607_ID_LDO9:
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if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */
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if (min_uV <= 1800000)
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val = 0;
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else if (min_uV <= 1900000)
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val = (min_uV - 1750001) / 50000;
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else
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val = 3; /* 2700mV */
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} else { /* 2700mV ~ 2850mV / 50mV */
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if (min_uV <= 2850000) {
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val = (min_uV - 2650001) / 50000;
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val += 3;
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} else if (min_uV <= 3300000)
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val = 7;
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else
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val = -EINVAL;
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}
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break;
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case PM8607_ID_LDO4:
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if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */
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if (min_uV <= 1800000)
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val = 0;
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else if (min_uV <= 1900000)
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val = (min_uV - 1750001) / 50000;
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else
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val = 3; /* 2700mV */
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} else { /* 2700mV ~ 2800mV / 50mV */
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if (min_uV <= 2850000) {
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val = (min_uV - 2650001) / 50000;
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val += 3;
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} else if (min_uV <= 2900000)
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val = 6;
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else if (min_uV <= 3300000)
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val = 7;
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else
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val = -EINVAL;
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}
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break;
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case PM8607_ID_LDO6:
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if (min_uV < 2600000) { /* 1800mV ~ 1850mV / 50mV */
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if (min_uV <= 1800000)
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val = 0;
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else if (min_uV <= 1850000)
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val = (min_uV - 1750001) / 50000;
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else
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val = 2; /* 2600mV */
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} else { /* 2600mV ~ 2800mV / 50mV */
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if (min_uV <= 2800000) {
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val = (min_uV - 2550001) / 50000;
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val += 2;
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} else if (min_uV <= 3300000)
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val = 7;
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else
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val = -EINVAL;
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}
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break;
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case PM8607_ID_LDO14:
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if (min_uV < 2700000) { /* 1800mV ~ 1850mV / 50mV */
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if (min_uV <= 1800000)
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val = 0;
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else if (min_uV <= 1850000)
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val = (min_uV - 1750001) / 50000;
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else
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val = 2; /* 2700mV */
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} else { /* 2700mV ~ 2900mV / 50mV */
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if (min_uV <= 2900000) {
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val = (min_uV - 2650001) / 50000;
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val += 2;
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} else if (min_uV <= 3300000)
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val = 7;
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else
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val = -EINVAL;
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}
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break;
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}
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if (val >= 0) {
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ret = pm8607_list_voltage(rdev, val);
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if (ret > max_uV) {
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pr_err("exceed voltage range (%d %d) uV",
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min_uV, max_uV);
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return -EINVAL;
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}
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} else
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pr_err("invalid voltage range (%d %d) uV", min_uV, max_uV);
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return val;
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}
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static int pm8607_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
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uint8_t val, mask;
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int ret;
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if (check_range(info, min_uV, max_uV)) {
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pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
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return -EINVAL;
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}
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ret = choose_voltage(rdev, min_uV, max_uV);
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if (ret < 0)
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return -EINVAL;
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val = (uint8_t)(ret << info->vol_shift);
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mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
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ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, val);
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if (ret)
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return ret;
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switch (info->desc.id) {
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case PM8607_ID_BUCK1:
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case PM8607_ID_BUCK3:
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ret = pm860x_set_bits(info->i2c, info->update_reg,
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1 << info->update_bit,
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1 << info->update_bit);
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break;
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}
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return ret;
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}
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static int pm8607_get_voltage(struct regulator_dev *rdev)
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{
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struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
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uint8_t val, mask;
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int ret;
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ret = pm860x_reg_read(info->i2c, info->vol_reg);
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if (ret < 0)
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return ret;
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mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
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val = ((unsigned char)ret & mask) >> info->vol_shift;
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return pm8607_list_voltage(rdev, val);
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}
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static int pm8607_enable(struct regulator_dev *rdev)
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{
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struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
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return pm860x_set_bits(info->i2c, info->enable_reg,
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1 << info->enable_bit,
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1 << info->enable_bit);
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}
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static int pm8607_disable(struct regulator_dev *rdev)
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{
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struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
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return pm860x_set_bits(info->i2c, info->enable_reg,
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1 << info->enable_bit, 0);
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}
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static int pm8607_is_enabled(struct regulator_dev *rdev)
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{
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struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
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int ret;
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ret = pm860x_reg_read(info->i2c, info->enable_reg);
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if (ret < 0)
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return ret;
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return !!((unsigned char)ret & (1 << info->enable_bit));
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}
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static struct regulator_ops pm8607_regulator_ops = {
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.set_voltage = pm8607_set_voltage,
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.get_voltage = pm8607_get_voltage,
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.enable = pm8607_enable,
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.disable = pm8607_disable,
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.is_enabled = pm8607_is_enabled,
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};
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#define PM8607_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
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{ \
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.desc = { \
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.name = "BUCK" #_id, \
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.ops = &pm8607_regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = PM8607_ID_BUCK##_id, \
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.owner = THIS_MODULE, \
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}, \
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.min_uV = (min) * 1000, \
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.max_uV = (max) * 1000, \
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.step_uV = (step) * 1000, \
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.vol_reg = PM8607_##vreg, \
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.vol_shift = (0), \
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.vol_nbits = (nbits), \
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.update_reg = PM8607_##ureg, \
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.update_bit = (ubit), \
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.enable_reg = PM8607_##ereg, \
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.enable_bit = (ebit), \
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.slope_double = (0), \
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}
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#define PM8607_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
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{ \
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.desc = { \
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.name = "LDO" #_id, \
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.ops = &pm8607_regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = PM8607_ID_LDO##_id, \
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.owner = THIS_MODULE, \
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}, \
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.min_uV = (min) * 1000, \
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.max_uV = (max) * 1000, \
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.step_uV = (step) * 1000, \
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.vol_reg = PM8607_##vreg, \
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.vol_shift = (shift), \
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.vol_nbits = (nbits), \
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.enable_reg = PM8607_##ereg, \
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.enable_bit = (ebit), \
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.slope_double = (0), \
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}
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static struct pm8607_regulator_info pm8607_regulator_info[] = {
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PM8607_DVC(1, 0, 1500, 25, BUCK1, 6, GO, 0, SUPPLIES_EN11, 0),
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PM8607_DVC(3, 0, 1500, 25, BUCK3, 6, GO, 2, SUPPLIES_EN11, 2),
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PM8607_LDO(1 , 1200, 2800, 0, LDO1 , 0, 2, SUPPLIES_EN11, 3),
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PM8607_LDO(2 , 1800, 3300, 0, LDO2 , 0, 3, SUPPLIES_EN11, 4),
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PM8607_LDO(3 , 1800, 3300, 0, LDO3 , 0, 3, SUPPLIES_EN11, 5),
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PM8607_LDO(4 , 1800, 3300, 0, LDO4 , 0, 3, SUPPLIES_EN11, 6),
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PM8607_LDO(5 , 2900, 3300, 0, LDO5 , 0, 2, SUPPLIES_EN11, 7),
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PM8607_LDO(6 , 1800, 3300, 0, LDO6 , 0, 3, SUPPLIES_EN12, 0),
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PM8607_LDO(7 , 1800, 2900, 0, LDO7 , 0, 3, SUPPLIES_EN12, 1),
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PM8607_LDO(8 , 1800, 2900, 0, LDO8 , 0, 3, SUPPLIES_EN12, 2),
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PM8607_LDO(9 , 1800, 3300, 0, LDO9 , 0, 3, SUPPLIES_EN12, 3),
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PM8607_LDO(10, 1200, 3300, 0, LDO10, 0, 4, SUPPLIES_EN11, 4),
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PM8607_LDO(12, 1200, 3300, 0, LDO12, 0, 4, SUPPLIES_EN11, 5),
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PM8607_LDO(14, 1800, 3300, 0, LDO14, 0, 3, SUPPLIES_EN11, 6),
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};
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static inline struct pm8607_regulator_info *find_regulator_info(int id)
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{
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struct pm8607_regulator_info *info;
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int i;
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for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
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info = &pm8607_regulator_info[i];
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if (info->desc.id == id)
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return info;
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}
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return NULL;
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}
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static int __devinit pm8607_regulator_probe(struct platform_device *pdev)
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{
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struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
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struct pm860x_platform_data *pdata = chip->dev->platform_data;
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struct pm8607_regulator_info *info = NULL;
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info = find_regulator_info(pdev->id);
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if (info == NULL) {
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dev_err(&pdev->dev, "invalid regulator ID specified\n");
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return -EINVAL;
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}
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info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
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info->chip = chip;
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info->regulator = regulator_register(&info->desc, &pdev->dev,
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|
pdata->regulator[pdev->id], info);
|
|
if (IS_ERR(info->regulator)) {
|
|
dev_err(&pdev->dev, "failed to register regulator %s\n",
|
|
info->desc.name);
|
|
return PTR_ERR(info->regulator);
|
|
}
|
|
|
|
/* check DVC ramp slope double */
|
|
if (info->desc.id == PM8607_ID_BUCK3)
|
|
if (info->chip->buck3_double)
|
|
info->slope_double = 1;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit pm8607_regulator_remove(struct platform_device *pdev)
|
|
{
|
|
struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
|
|
|
|
regulator_unregister(info->regulator);
|
|
return 0;
|
|
}
|
|
|
|
#define PM8607_REGULATOR_DRIVER(_name) \
|
|
{ \
|
|
.driver = { \
|
|
.name = "88pm8607-" #_name, \
|
|
.owner = THIS_MODULE, \
|
|
}, \
|
|
.probe = pm8607_regulator_probe, \
|
|
.remove = __devexit_p(pm8607_regulator_remove), \
|
|
}
|
|
|
|
static struct platform_driver pm8607_regulator_driver[] = {
|
|
PM8607_REGULATOR_DRIVER(buck1),
|
|
PM8607_REGULATOR_DRIVER(buck2),
|
|
PM8607_REGULATOR_DRIVER(buck3),
|
|
PM8607_REGULATOR_DRIVER(ldo1),
|
|
PM8607_REGULATOR_DRIVER(ldo2),
|
|
PM8607_REGULATOR_DRIVER(ldo3),
|
|
PM8607_REGULATOR_DRIVER(ldo4),
|
|
PM8607_REGULATOR_DRIVER(ldo5),
|
|
PM8607_REGULATOR_DRIVER(ldo6),
|
|
PM8607_REGULATOR_DRIVER(ldo7),
|
|
PM8607_REGULATOR_DRIVER(ldo8),
|
|
PM8607_REGULATOR_DRIVER(ldo9),
|
|
PM8607_REGULATOR_DRIVER(ldo10),
|
|
PM8607_REGULATOR_DRIVER(ldo12),
|
|
PM8607_REGULATOR_DRIVER(ldo14),
|
|
};
|
|
|
|
static int __init pm8607_regulator_init(void)
|
|
{
|
|
int i, count, ret;
|
|
|
|
count = ARRAY_SIZE(pm8607_regulator_driver);
|
|
for (i = 0; i < count; i++) {
|
|
ret = platform_driver_register(&pm8607_regulator_driver[i]);
|
|
if (ret != 0)
|
|
pr_err("Failed to register regulator driver: %d\n",
|
|
ret);
|
|
}
|
|
return 0;
|
|
}
|
|
subsys_initcall(pm8607_regulator_init);
|
|
|
|
static void __exit pm8607_regulator_exit(void)
|
|
{
|
|
int i, count;
|
|
|
|
count = ARRAY_SIZE(pm8607_regulator_driver);
|
|
for (i = 0; i < count; i++)
|
|
platform_driver_unregister(&pm8607_regulator_driver[i]);
|
|
}
|
|
module_exit(pm8607_regulator_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
|
|
MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
|
|
MODULE_ALIAS("platform:88pm8607-regulator");
|