627 lines
16 KiB
C
627 lines
16 KiB
C
/*
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* Regulator driver for DA9055 PMIC
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*
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* Copyright(c) 2012 Dialog Semiconductor Ltd.
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*
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* Author: David Dajun Chen <dchen@diasemi.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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/gpio.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/da9055/core.h>
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#include <linux/mfd/da9055/reg.h>
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#include <linux/mfd/da9055/pdata.h>
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#define DA9055_MIN_UA 0
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#define DA9055_MAX_UA 3
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#define DA9055_LDO_MODE_SYNC 0
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#define DA9055_LDO_MODE_SLEEP 1
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#define DA9055_BUCK_MODE_SLEEP 1
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#define DA9055_BUCK_MODE_SYNC 2
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#define DA9055_BUCK_MODE_AUTO 3
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/* DA9055 REGULATOR IDs */
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#define DA9055_ID_BUCK1 0
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#define DA9055_ID_BUCK2 1
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#define DA9055_ID_LDO1 2
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#define DA9055_ID_LDO2 3
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#define DA9055_ID_LDO3 4
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#define DA9055_ID_LDO4 5
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#define DA9055_ID_LDO5 6
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#define DA9055_ID_LDO6 7
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/* DA9055 BUCK current limit */
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static const int da9055_current_limits[] = { 500000, 600000, 700000, 800000 };
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struct da9055_conf_reg {
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int reg;
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int sel_mask;
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int en_mask;
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};
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struct da9055_volt_reg {
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int reg_a;
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int reg_b;
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int sl_shift;
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int v_mask;
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};
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struct da9055_mode_reg {
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int reg;
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int mask;
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int shift;
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};
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struct da9055_regulator_info {
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struct regulator_desc reg_desc;
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struct da9055_conf_reg conf;
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struct da9055_volt_reg volt;
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struct da9055_mode_reg mode;
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};
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struct da9055_regulator {
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struct da9055 *da9055;
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struct da9055_regulator_info *info;
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struct regulator_dev *rdev;
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enum gpio_select reg_rselect;
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};
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static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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int ret, mode = 0;
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ret = da9055_reg_read(regulator->da9055, info->mode.reg);
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if (ret < 0)
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return ret;
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switch ((ret & info->mode.mask) >> info->mode.shift) {
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case DA9055_BUCK_MODE_SYNC:
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mode = REGULATOR_MODE_FAST;
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break;
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case DA9055_BUCK_MODE_AUTO:
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mode = REGULATOR_MODE_NORMAL;
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break;
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case DA9055_BUCK_MODE_SLEEP:
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mode = REGULATOR_MODE_STANDBY;
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break;
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}
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return mode;
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}
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static int da9055_buck_set_mode(struct regulator_dev *rdev,
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unsigned int mode)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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int val = 0;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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val = DA9055_BUCK_MODE_SYNC << info->mode.shift;
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break;
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case REGULATOR_MODE_NORMAL:
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val = DA9055_BUCK_MODE_AUTO << info->mode.shift;
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break;
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case REGULATOR_MODE_STANDBY:
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val = DA9055_BUCK_MODE_SLEEP << info->mode.shift;
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break;
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}
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return da9055_reg_update(regulator->da9055, info->mode.reg,
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info->mode.mask, val);
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}
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static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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int ret;
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ret = da9055_reg_read(regulator->da9055, info->volt.reg_b);
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if (ret < 0)
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return ret;
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if (ret >> info->volt.sl_shift)
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return REGULATOR_MODE_STANDBY;
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else
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return REGULATOR_MODE_NORMAL;
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}
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static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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struct da9055_volt_reg volt = info->volt;
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int val = 0;
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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case REGULATOR_MODE_FAST:
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val = DA9055_LDO_MODE_SYNC;
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break;
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case REGULATOR_MODE_STANDBY:
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val = DA9055_LDO_MODE_SLEEP;
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break;
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}
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return da9055_reg_update(regulator->da9055, volt.reg_b,
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1 << volt.sl_shift,
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val << volt.sl_shift);
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}
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static int da9055_buck_get_current_limit(struct regulator_dev *rdev)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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int ret;
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ret = da9055_reg_read(regulator->da9055, DA9055_REG_BUCK_LIM);
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if (ret < 0)
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return ret;
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ret &= info->mode.mask;
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return da9055_current_limits[ret >> info->mode.shift];
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}
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static int da9055_buck_set_current_limit(struct regulator_dev *rdev, int min_uA,
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int max_uA)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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int i;
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for (i = ARRAY_SIZE(da9055_current_limits) - 1; i >= 0; i--) {
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if ((min_uA <= da9055_current_limits[i]) &&
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(da9055_current_limits[i] <= max_uA))
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return da9055_reg_update(regulator->da9055,
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DA9055_REG_BUCK_LIM,
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info->mode.mask,
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i << info->mode.shift);
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}
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return -EINVAL;
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}
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static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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struct da9055_volt_reg volt = info->volt;
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int ret, sel;
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/*
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* There are two voltage register set A & B for voltage ramping but
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* either one of then can be active therefore we first determine
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* the active register set.
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*/
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ret = da9055_reg_read(regulator->da9055, info->conf.reg);
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if (ret < 0)
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return ret;
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ret &= info->conf.sel_mask;
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/* Get the voltage for the active register set A/B */
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if (ret == DA9055_REGUALTOR_SET_A)
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ret = da9055_reg_read(regulator->da9055, volt.reg_a);
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else
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ret = da9055_reg_read(regulator->da9055, volt.reg_b);
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if (ret < 0)
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return ret;
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sel = (ret & volt.v_mask);
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return sel;
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}
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static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev,
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unsigned int selector)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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int ret;
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/*
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* Regulator register set A/B is not selected through GPIO therefore
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* we use default register set A for voltage ramping.
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*/
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if (regulator->reg_rselect == NO_GPIO) {
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/* Select register set A */
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ret = da9055_reg_update(regulator->da9055, info->conf.reg,
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info->conf.sel_mask, DA9055_SEL_REG_A);
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if (ret < 0)
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return ret;
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/* Set the voltage */
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return da9055_reg_update(regulator->da9055, info->volt.reg_a,
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info->volt.v_mask, selector);
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}
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/*
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* Here regulator register set A/B is selected through GPIO.
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* Therefore we first determine the selected register set A/B and
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* then set the desired voltage for that register set A/B.
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*/
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ret = da9055_reg_read(regulator->da9055, info->conf.reg);
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if (ret < 0)
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return ret;
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ret &= info->conf.sel_mask;
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/* Set the voltage */
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if (ret == DA9055_REGUALTOR_SET_A)
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return da9055_reg_update(regulator->da9055, info->volt.reg_a,
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info->volt.v_mask, selector);
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else
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return da9055_reg_update(regulator->da9055, info->volt.reg_b,
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info->volt.v_mask, selector);
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}
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static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev,
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int uV)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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int ret;
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/* Select register set B for suspend voltage ramping. */
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if (regulator->reg_rselect == NO_GPIO) {
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ret = da9055_reg_update(regulator->da9055, info->conf.reg,
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info->conf.sel_mask, DA9055_SEL_REG_B);
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if (ret < 0)
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return ret;
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}
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ret = regulator_map_voltage_linear(rdev, uV, uV);
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if (ret < 0)
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return ret;
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return da9055_reg_update(regulator->da9055, info->volt.reg_b,
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info->volt.v_mask, ret);
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}
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static int da9055_suspend_enable(struct regulator_dev *rdev)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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/* Select register set B for voltage ramping. */
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if (regulator->reg_rselect == NO_GPIO)
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return da9055_reg_update(regulator->da9055, info->conf.reg,
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info->conf.sel_mask, DA9055_SEL_REG_B);
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else
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return 0;
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}
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static int da9055_suspend_disable(struct regulator_dev *rdev)
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{
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9055_regulator_info *info = regulator->info;
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/* Diselect register set B. */
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if (regulator->reg_rselect == NO_GPIO)
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return da9055_reg_update(regulator->da9055, info->conf.reg,
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info->conf.sel_mask, DA9055_SEL_REG_A);
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else
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return 0;
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}
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static struct regulator_ops da9055_buck_ops = {
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.get_mode = da9055_buck_get_mode,
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.set_mode = da9055_buck_set_mode,
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.get_current_limit = da9055_buck_get_current_limit,
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.set_current_limit = da9055_buck_set_current_limit,
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.get_voltage_sel = da9055_regulator_get_voltage_sel,
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.set_voltage_sel = da9055_regulator_set_voltage_sel,
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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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.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
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.set_suspend_enable = da9055_suspend_enable,
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.set_suspend_disable = da9055_suspend_disable,
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.set_suspend_mode = da9055_buck_set_mode,
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};
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static struct regulator_ops da9055_ldo_ops = {
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.get_mode = da9055_ldo_get_mode,
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.set_mode = da9055_ldo_set_mode,
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.get_voltage_sel = da9055_regulator_get_voltage_sel,
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.set_voltage_sel = da9055_regulator_set_voltage_sel,
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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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.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
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.set_suspend_enable = da9055_suspend_enable,
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.set_suspend_disable = da9055_suspend_disable,
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.set_suspend_mode = da9055_ldo_set_mode,
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};
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#define DA9055_LDO(_id, step, min, max, vbits, voffset) \
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{\
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.reg_desc = {\
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.name = #_id,\
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.ops = &da9055_ldo_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = DA9055_ID_##_id,\
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.n_voltages = (max - min) / step + 1 + (voffset), \
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.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
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.enable_mask = 1, \
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.min_uV = (min) * 1000,\
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.uV_step = (step) * 1000,\
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.linear_min_sel = (voffset),\
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.owner = THIS_MODULE,\
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},\
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.conf = {\
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.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
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.sel_mask = (1 << 4),\
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.en_mask = 1,\
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},\
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.volt = {\
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.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
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.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
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.sl_shift = 7,\
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.v_mask = (1 << (vbits)) - 1,\
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},\
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}
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#define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \
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{\
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.reg_desc = {\
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.name = #_id,\
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.ops = &da9055_buck_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = DA9055_ID_##_id,\
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.n_voltages = (max - min) / step + 1 + (voffset), \
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.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
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.enable_mask = 1,\
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.min_uV = (min) * 1000,\
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.uV_step = (step) * 1000,\
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.linear_min_sel = (voffset),\
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.owner = THIS_MODULE,\
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},\
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.conf = {\
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.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
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.sel_mask = (1 << 4),\
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.en_mask = 1,\
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},\
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.volt = {\
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.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
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.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
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.sl_shift = 7,\
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.v_mask = (1 << (vbits)) - 1,\
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},\
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.mode = {\
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.reg = DA9055_REG_BCORE_MODE,\
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.mask = (mbits),\
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.shift = (sbits),\
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},\
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}
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static struct da9055_regulator_info da9055_regulator_info[] = {
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DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2),
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DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0),
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DA9055_LDO(LDO1, 50, 900, 3300, 6, 2),
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DA9055_LDO(LDO2, 50, 900, 3300, 6, 3),
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DA9055_LDO(LDO3, 50, 900, 3300, 6, 2),
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DA9055_LDO(LDO4, 50, 900, 3300, 6, 2),
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DA9055_LDO(LDO5, 50, 900, 2750, 6, 2),
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DA9055_LDO(LDO6, 20, 900, 3300, 7, 0),
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};
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/*
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* Configures regulator to be controlled either through GPIO 1 or 2.
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* GPIO can control regulator state and/or select the regulator register
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* set A/B for voltage ramping.
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*/
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static int da9055_gpio_init(struct da9055_regulator *regulator,
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struct regulator_config *config,
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struct da9055_pdata *pdata, int id)
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{
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struct da9055_regulator_info *info = regulator->info;
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int ret = 0;
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if (pdata->gpio_ren && pdata->gpio_ren[id]) {
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char name[18];
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int gpio_mux = pdata->gpio_ren[id];
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config->ena_gpio = pdata->ena_gpio[id];
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config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
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config->ena_gpio_invert = 1;
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/*
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* GPI pin is muxed with regulator to control the
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* regulator state.
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*/
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sprintf(name, "DA9055 GPI %d", gpio_mux);
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ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
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name);
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if (ret < 0)
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goto err;
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/*
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* Let the regulator know that its state is controlled
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* through GPI.
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*/
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ret = da9055_reg_update(regulator->da9055, info->conf.reg,
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DA9055_E_GPI_MASK,
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pdata->reg_ren[id]
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<< DA9055_E_GPI_SHIFT);
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if (ret < 0)
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goto err;
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}
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if (pdata->gpio_rsel && pdata->gpio_rsel[id]) {
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|
char name[18];
|
|
int gpio_mux = pdata->gpio_rsel[id];
|
|
|
|
regulator->reg_rselect = pdata->reg_rsel[id];
|
|
|
|
/*
|
|
* GPI pin is muxed with regulator to select the
|
|
* regulator register set A/B for voltage ramping.
|
|
*/
|
|
sprintf(name, "DA9055 GPI %d", gpio_mux);
|
|
ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
|
|
name);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/*
|
|
* Let the regulator know that its register set A/B
|
|
* will be selected through GPI for voltage ramping.
|
|
*/
|
|
ret = da9055_reg_update(regulator->da9055, info->conf.reg,
|
|
DA9055_V_GPI_MASK,
|
|
pdata->reg_rsel[id]
|
|
<< DA9055_V_GPI_SHIFT);
|
|
}
|
|
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data)
|
|
{
|
|
struct da9055_regulator *regulator = data;
|
|
|
|
regulator_notifier_call_chain(regulator->rdev,
|
|
REGULATOR_EVENT_OVER_CURRENT, NULL);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static inline struct da9055_regulator_info *find_regulator_info(int id)
|
|
{
|
|
struct da9055_regulator_info *info;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) {
|
|
info = &da9055_regulator_info[i];
|
|
if (info->reg_desc.id == id)
|
|
return info;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int da9055_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct regulator_config config = { };
|
|
struct da9055_regulator *regulator;
|
|
struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
|
|
struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
|
|
int ret, irq;
|
|
|
|
if (pdata == NULL || pdata->regulators[pdev->id] == NULL)
|
|
return -ENODEV;
|
|
|
|
regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator),
|
|
GFP_KERNEL);
|
|
if (!regulator)
|
|
return -ENOMEM;
|
|
|
|
regulator->info = find_regulator_info(pdev->id);
|
|
if (regulator->info == NULL) {
|
|
dev_err(&pdev->dev, "invalid regulator ID specified\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regulator->da9055 = da9055;
|
|
config.dev = &pdev->dev;
|
|
config.driver_data = regulator;
|
|
config.regmap = da9055->regmap;
|
|
|
|
if (pdata && pdata->regulators)
|
|
config.init_data = pdata->regulators[pdev->id];
|
|
|
|
ret = da9055_gpio_init(regulator, &config, pdata, pdev->id);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
regulator->rdev = devm_regulator_register(&pdev->dev,
|
|
®ulator->info->reg_desc,
|
|
&config);
|
|
if (IS_ERR(regulator->rdev)) {
|
|
dev_err(&pdev->dev, "Failed to register regulator %s\n",
|
|
regulator->info->reg_desc.name);
|
|
return PTR_ERR(regulator->rdev);
|
|
}
|
|
|
|
/* Only LDO 5 and 6 has got the over current interrupt */
|
|
if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) {
|
|
irq = platform_get_irq_byname(pdev, "REGULATOR");
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
|
|
da9055_ldo5_6_oc_irq,
|
|
IRQF_TRIGGER_HIGH |
|
|
IRQF_ONESHOT |
|
|
IRQF_PROBE_SHARED,
|
|
pdev->name, regulator);
|
|
if (ret != 0) {
|
|
if (ret != -EBUSY) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to request Regulator IRQ %d: %d\n",
|
|
irq, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
platform_set_drvdata(pdev, regulator);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver da9055_regulator_driver = {
|
|
.probe = da9055_regulator_probe,
|
|
.driver = {
|
|
.name = "da9055-regulator",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init da9055_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&da9055_regulator_driver);
|
|
}
|
|
subsys_initcall(da9055_regulator_init);
|
|
|
|
static void __exit da9055_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&da9055_regulator_driver);
|
|
}
|
|
module_exit(da9055_regulator_exit);
|
|
|
|
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
|
|
MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:da9055-regulator");
|