488 lines
13 KiB
C
488 lines
13 KiB
C
/*
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* da9052-regulator.c: Regulator driver for DA9052
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*
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* Copyright(c) 2011 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/moduleparam.h>
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#include <linux/init.h>
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#include <linux/err.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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#ifdef CONFIG_OF
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#include <linux/of.h>
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#include <linux/regulator/of_regulator.h>
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#endif
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#include <linux/mfd/da9052/da9052.h>
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#include <linux/mfd/da9052/reg.h>
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#include <linux/mfd/da9052/pdata.h>
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/* Buck step size */
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#define DA9052_BUCK_PERI_3uV_STEP 100000
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#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
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#define DA9052_CONST_3uV 3000000
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#define DA9052_MIN_UA 0
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#define DA9052_MAX_UA 3
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#define DA9052_CURRENT_RANGE 4
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/* Bit masks */
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#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
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#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
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/* DA9052 REGULATOR IDs */
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#define DA9052_ID_BUCK1 0
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#define DA9052_ID_BUCK2 1
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#define DA9052_ID_BUCK3 2
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#define DA9052_ID_BUCK4 3
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#define DA9052_ID_LDO1 4
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#define DA9052_ID_LDO2 5
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#define DA9052_ID_LDO3 6
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#define DA9052_ID_LDO4 7
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#define DA9052_ID_LDO5 8
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#define DA9052_ID_LDO6 9
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#define DA9052_ID_LDO7 10
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#define DA9052_ID_LDO8 11
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#define DA9052_ID_LDO9 12
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#define DA9052_ID_LDO10 13
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static const u32 da9052_current_limits[3][4] = {
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{700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
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{1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
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{800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
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* BUCK-MEM and BUCK-PERI
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*/
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};
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struct da9052_regulator_info {
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struct regulator_desc reg_desc;
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int step_uV;
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int min_uV;
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int max_uV;
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unsigned char activate_bit;
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};
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struct da9052_regulator {
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struct da9052 *da9052;
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struct da9052_regulator_info *info;
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struct regulator_dev *rdev;
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};
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static int verify_range(struct da9052_regulator_info *info,
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int min_uV, int max_uV)
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{
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if (min_uV > info->max_uV || max_uV < info->min_uV)
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return -EINVAL;
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return 0;
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}
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static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
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{
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struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
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int offset = rdev_get_id(rdev);
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int ret, row = 2;
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ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
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if (ret < 0)
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return ret;
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/* Determine the even or odd position of the buck current limit
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* register field
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*/
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if (offset % 2 == 0)
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ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
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else
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ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
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/* Select the appropriate current limit range */
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if (regulator->da9052->chip_id == DA9052)
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row = 0;
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else if (offset == 0)
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row = 1;
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return da9052_current_limits[row][ret];
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}
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static int da9052_dcdc_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 da9052_regulator *regulator = rdev_get_drvdata(rdev);
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int offset = rdev_get_id(rdev);
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int reg_val = 0;
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int i, row = 2;
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/* Select the appropriate current limit range */
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if (regulator->da9052->chip_id == DA9052)
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row = 0;
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else if (offset == 0)
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row = 1;
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for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
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if ((min_uA <= da9052_current_limits[row][i]) &&
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(da9052_current_limits[row][i] <= max_uA)) {
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reg_val = i;
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break;
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}
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}
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if (i < 0)
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return -EINVAL;
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/* Determine the even or odd position of the buck current limit
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* register field
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*/
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if (offset % 2 == 0)
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return da9052_reg_update(regulator->da9052,
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DA9052_BUCKA_REG + offset/2,
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DA9052_BUCK_ILIM_MASK_EVEN,
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reg_val << 2);
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else
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return da9052_reg_update(regulator->da9052,
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DA9052_BUCKA_REG + offset/2,
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DA9052_BUCK_ILIM_MASK_ODD,
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reg_val << 6);
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}
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static int da9052_list_voltage(struct regulator_dev *rdev,
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unsigned int selector)
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{
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struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9052_regulator_info *info = regulator->info;
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int id = rdev_get_id(rdev);
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int volt_uV;
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if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
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&& (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
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volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
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+ info->min_uV);
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volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
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* (DA9052_BUCK_PERI_3uV_STEP);
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} else {
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volt_uV = (selector * info->step_uV) + info->min_uV;
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}
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if (volt_uV > info->max_uV)
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return -EINVAL;
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return volt_uV;
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}
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static int da9052_map_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9052_regulator_info *info = regulator->info;
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int id = rdev_get_id(rdev);
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int ret, sel;
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ret = verify_range(info, min_uV, max_uV);
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if (ret < 0)
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return ret;
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if (min_uV < info->min_uV)
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min_uV = info->min_uV;
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if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
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&& (min_uV >= DA9052_CONST_3uV)) {
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sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
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DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
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DA9052_BUCK_PERI_3uV_STEP);
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} else {
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sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
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}
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ret = da9052_list_voltage(rdev, sel);
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if (ret < 0)
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return ret;
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return sel;
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}
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static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev,
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unsigned int selector)
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{
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struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9052_regulator_info *info = regulator->info;
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int id = rdev_get_id(rdev);
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int ret;
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ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
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rdev->desc->vsel_mask, selector);
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if (ret < 0)
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return ret;
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/* Some LDOs and DCDCs are DVC controlled which requires enabling of
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* the activate bit to implment the changes on the output.
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*/
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switch (id) {
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case DA9052_ID_BUCK1:
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case DA9052_ID_BUCK2:
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case DA9052_ID_BUCK3:
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case DA9052_ID_LDO2:
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case DA9052_ID_LDO3:
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ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
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info->activate_bit, info->activate_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 da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
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unsigned int old_sel,
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unsigned int new_sel)
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{
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struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
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struct da9052_regulator_info *info = regulator->info;
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int id = rdev_get_id(rdev);
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int ret = 0;
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/* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling
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* the activate bit.
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*/
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switch (id) {
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case DA9052_ID_BUCK1:
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case DA9052_ID_BUCK2:
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case DA9052_ID_BUCK3:
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case DA9052_ID_LDO2:
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case DA9052_ID_LDO3:
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ret = (new_sel - old_sel) * info->step_uV / 6250;
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break;
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}
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return ret;
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}
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static const struct regulator_ops da9052_dcdc_ops = {
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.get_current_limit = da9052_dcdc_get_current_limit,
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.set_current_limit = da9052_dcdc_set_current_limit,
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.list_voltage = da9052_list_voltage,
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.map_voltage = da9052_map_voltage,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = da9052_regulator_set_voltage_sel,
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.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
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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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};
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static const struct regulator_ops da9052_ldo_ops = {
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.list_voltage = da9052_list_voltage,
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.map_voltage = da9052_map_voltage,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = da9052_regulator_set_voltage_sel,
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.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
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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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};
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#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
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{\
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.reg_desc = {\
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.name = #_id,\
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.ops = &da9052_ldo_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = DA9052_ID_##_id,\
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.n_voltages = (max - min) / step + 1, \
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.owner = THIS_MODULE,\
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.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
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.vsel_mask = (1 << (sbits)) - 1,\
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.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
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.enable_mask = 1 << (ebits),\
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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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.activate_bit = (abits),\
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}
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#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
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{\
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.reg_desc = {\
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.name = #_id,\
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.ops = &da9052_dcdc_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = DA9052_ID_##_id,\
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.n_voltages = (max - min) / step + 1, \
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.owner = THIS_MODULE,\
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.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
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.vsel_mask = (1 << (sbits)) - 1,\
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.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
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.enable_mask = 1 << (ebits),\
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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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.activate_bit = (abits),\
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}
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static struct da9052_regulator_info da9052_regulator_info[] = {
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DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
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DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
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DA9052_DCDC(BUCK3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
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DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
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DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
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DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
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DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
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DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
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DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
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DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
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};
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static struct da9052_regulator_info da9053_regulator_info[] = {
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DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
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DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
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DA9052_DCDC(BUCK3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
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DA9052_DCDC(BUCK4, 25, 950, 2525, 6, 6, 0),
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DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
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DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
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DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
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DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
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DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
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DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
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DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
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};
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static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
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int id)
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{
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struct da9052_regulator_info *info;
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int i;
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switch (chip_id) {
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case DA9052:
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for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
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info = &da9052_regulator_info[i];
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if (info->reg_desc.id == id)
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return info;
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}
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break;
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case DA9053_AA:
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case DA9053_BA:
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case DA9053_BB:
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case DA9053_BC:
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for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
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info = &da9053_regulator_info[i];
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if (info->reg_desc.id == id)
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return info;
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}
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break;
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}
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return NULL;
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}
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static int da9052_regulator_probe(struct platform_device *pdev)
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{
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const struct mfd_cell *cell = mfd_get_cell(pdev);
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struct regulator_config config = { };
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struct da9052_regulator *regulator;
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struct da9052 *da9052;
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struct da9052_pdata *pdata;
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regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
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GFP_KERNEL);
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if (!regulator)
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return -ENOMEM;
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da9052 = dev_get_drvdata(pdev->dev.parent);
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pdata = dev_get_platdata(da9052->dev);
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regulator->da9052 = da9052;
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regulator->info = find_regulator_info(regulator->da9052->chip_id,
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cell->id);
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if (regulator->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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config.dev = &pdev->dev;
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config.driver_data = regulator;
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config.regmap = da9052->regmap;
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if (pdata && pdata->regulators) {
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config.init_data = pdata->regulators[cell->id];
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} else {
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#ifdef CONFIG_OF
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struct device_node *nproot = da9052->dev->of_node;
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struct device_node *np;
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if (!nproot)
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return -ENODEV;
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nproot = of_get_child_by_name(nproot, "regulators");
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if (!nproot)
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return -ENODEV;
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for_each_child_of_node(nproot, np) {
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if (!of_node_cmp(np->name,
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regulator->info->reg_desc.name)) {
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config.init_data = of_get_regulator_init_data(
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&pdev->dev, np,
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®ulator->info->reg_desc);
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config.of_node = np;
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break;
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}
|
|
}
|
|
of_node_put(nproot);
|
|
#endif
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, regulator);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver da9052_regulator_driver = {
|
|
.probe = da9052_regulator_probe,
|
|
.driver = {
|
|
.name = "da9052-regulator",
|
|
},
|
|
};
|
|
|
|
static int __init da9052_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&da9052_regulator_driver);
|
|
}
|
|
subsys_initcall(da9052_regulator_init);
|
|
|
|
static void __exit da9052_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&da9052_regulator_driver);
|
|
}
|
|
module_exit(da9052_regulator_exit);
|
|
|
|
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
|
|
MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:da9052-regulator");
|