611 lines
16 KiB
C
611 lines
16 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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#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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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 volt_shift;
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unsigned char en_bit;
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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_regulator_enable(struct regulator_dev *rdev)
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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 offset = rdev_get_id(rdev);
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return da9052_reg_update(regulator->da9052,
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DA9052_BUCKCORE_REG + offset,
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1 << info->en_bit, 1 << info->en_bit);
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}
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static int da9052_regulator_disable(struct regulator_dev *rdev)
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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 offset = rdev_get_id(rdev);
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return da9052_reg_update(regulator->da9052,
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DA9052_BUCKCORE_REG + offset,
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1 << info->en_bit, 0);
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}
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static int da9052_regulator_is_enabled(struct regulator_dev *rdev)
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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 offset = rdev_get_id(rdev);
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int ret;
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ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
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if (ret < 0)
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return ret;
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return ret & (1 << info->en_bit);
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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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if (min_uA > da9052_current_limits[row][DA9052_MAX_UA] ||
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max_uA < da9052_current_limits[row][DA9052_MIN_UA])
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return -EINVAL;
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for (i = 0; i < DA9052_CURRENT_RANGE; i++) {
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if (min_uA <= da9052_current_limits[row][i]) {
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reg_val = i;
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break;
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}
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}
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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_buckperi_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 volt_uV;
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if ((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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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_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 volt_uV;
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volt_uV = info->min_uV + info->step_uV * selector;
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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_regulator_set_voltage_int(struct regulator_dev *rdev,
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int min_uV, int max_uV,
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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 offset = rdev_get_id(rdev);
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int ret;
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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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*selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
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ret = da9052_list_voltage(rdev, *selector);
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if (ret < 0)
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return ret;
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return da9052_reg_update(regulator->da9052,
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DA9052_BUCKCORE_REG + offset,
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(1 << info->volt_shift) - 1, *selector);
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}
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static int da9052_set_ldo_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV,
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unsigned int *selector)
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{
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return da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
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}
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static int da9052_set_ldo5_6_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV,
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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 ret;
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ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
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if (ret < 0)
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return ret;
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/* Some LDOs are DVC controlled which requires enabling of
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* the LDO activate bit to implment the changes on the
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* LDO output.
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*/
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return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
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info->activate_bit, info->activate_bit);
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}
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static int da9052_set_dcdc_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV,
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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 ret;
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ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
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if (ret < 0)
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return ret;
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/* Some DCDCs are DVC controlled which requires enabling of
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* the DCDC activate bit to implment the changes on the
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* DCDC output.
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*/
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return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
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info->activate_bit, info->activate_bit);
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}
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static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
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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 offset = rdev_get_id(rdev);
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int ret;
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ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
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if (ret < 0)
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return ret;
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ret &= ((1 << info->volt_shift) - 1);
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return ret;
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}
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static int da9052_set_buckperi_voltage(struct regulator_dev *rdev, int min_uV,
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int max_uV, 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 offset = rdev_get_id(rdev);
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int ret;
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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 ((regulator->da9052->chip_id == DA9052) &&
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(min_uV >= DA9052_CONST_3uV))
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*selector = 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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*selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
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ret = da9052_list_buckperi_voltage(rdev, *selector);
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if (ret < 0)
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return ret;
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return da9052_reg_update(regulator->da9052,
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DA9052_BUCKCORE_REG + offset,
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(1 << info->volt_shift) - 1, *selector);
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}
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static int da9052_get_buckperi_voltage_sel(struct regulator_dev *rdev)
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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 offset = rdev_get_id(rdev);
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int ret;
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ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
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if (ret < 0)
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return ret;
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ret &= ((1 << info->volt_shift) - 1);
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return ret;
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}
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static struct regulator_ops da9052_buckperi_ops = {
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.list_voltage = da9052_list_buckperi_voltage,
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.get_voltage_sel = da9052_get_buckperi_voltage_sel,
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.set_voltage = da9052_set_buckperi_voltage,
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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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.is_enabled = da9052_regulator_is_enabled,
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.enable = da9052_regulator_enable,
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.disable = da9052_regulator_disable,
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};
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static struct regulator_ops da9052_dcdc_ops = {
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.set_voltage = da9052_set_dcdc_voltage,
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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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.get_voltage_sel = da9052_get_regulator_voltage_sel,
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.is_enabled = da9052_regulator_is_enabled,
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.enable = da9052_regulator_enable,
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.disable = da9052_regulator_disable,
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};
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static struct regulator_ops da9052_ldo5_6_ops = {
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.set_voltage = da9052_set_ldo5_6_voltage,
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.list_voltage = da9052_list_voltage,
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.get_voltage_sel = da9052_get_regulator_voltage_sel,
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.is_enabled = da9052_regulator_is_enabled,
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.enable = da9052_regulator_enable,
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.disable = da9052_regulator_disable,
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};
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static struct regulator_ops da9052_ldo_ops = {
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.set_voltage = da9052_set_ldo_voltage,
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.list_voltage = da9052_list_voltage,
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.get_voltage_sel = da9052_get_regulator_voltage_sel,
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.is_enabled = da9052_regulator_is_enabled,
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.enable = da9052_regulator_enable,
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.disable = da9052_regulator_disable,
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};
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#define DA9052_LDO5_6(_id, step, min, max, sbits, ebits, abits) \
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{\
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.reg_desc = {\
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.name = "LDO" #_id,\
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.ops = &da9052_ldo5_6_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = _id,\
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.n_voltages = (max - min) / step + 1, \
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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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.volt_shift = (sbits),\
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.en_bit = (ebits),\
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.activate_bit = (abits),\
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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 = "LDO" #_id,\
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.ops = &da9052_ldo_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = _id,\
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.n_voltages = (max - min) / step + 1, \
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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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.volt_shift = (sbits),\
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.en_bit = (ebits),\
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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 = "BUCK" #_id,\
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.ops = &da9052_dcdc_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = _id,\
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.n_voltages = (max - min) / step + 1, \
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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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.volt_shift = (sbits),\
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.en_bit = (ebits),\
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.activate_bit = (abits),\
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}
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#define DA9052_BUCKPERI(_id, step, min, max, sbits, ebits, abits) \
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{\
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.reg_desc = {\
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.name = "BUCK" #_id,\
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.ops = &da9052_buckperi_ops,\
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.type = REGULATOR_VOLTAGE,\
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.id = _id,\
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.n_voltages = (max - min) / step + 1, \
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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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.volt_shift = (sbits),\
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.en_bit = (ebits),\
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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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/* Buck1 - 4 */
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DA9052_DCDC(0, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
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DA9052_DCDC(1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
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DA9052_DCDC(2, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
|
|
DA9052_BUCKPERI(3, 50, 1800, 3600, 5, 6, 0),
|
|
/* LD01 - LDO10 */
|
|
DA9052_LDO(4, 50, 600, 1800, 5, 6, 0),
|
|
DA9052_LDO5_6(5, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
|
|
DA9052_LDO5_6(6, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
|
|
DA9052_LDO(7, 25, 1725, 3300, 6, 6, 0),
|
|
DA9052_LDO(8, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(9, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(10, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(11, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(12, 50, 1250, 3650, 6, 6, 0),
|
|
DA9052_LDO(13, 50, 1200, 3600, 6, 6, 0),
|
|
};
|
|
|
|
static struct da9052_regulator_info da9053_regulator_info[] = {
|
|
/* Buck1 - 4 */
|
|
DA9052_DCDC(0, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
|
|
DA9052_DCDC(1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
|
|
DA9052_DCDC(2, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
|
|
DA9052_BUCKPERI(3, 25, 925, 2500, 6, 6, 0),
|
|
/* LD01 - LDO10 */
|
|
DA9052_LDO(4, 50, 600, 1800, 5, 6, 0),
|
|
DA9052_LDO5_6(5, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
|
|
DA9052_LDO5_6(6, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
|
|
DA9052_LDO(7, 25, 1725, 3300, 6, 6, 0),
|
|
DA9052_LDO(8, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(9, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(10, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(11, 50, 1200, 3600, 6, 6, 0),
|
|
DA9052_LDO(12, 50, 1250, 3650, 6, 6, 0),
|
|
DA9052_LDO(13, 50, 1200, 3600, 6, 6, 0),
|
|
};
|
|
|
|
static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
|
|
int id)
|
|
{
|
|
struct da9052_regulator_info *info;
|
|
int i;
|
|
|
|
switch (chip_id) {
|
|
case DA9052:
|
|
for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
|
|
info = &da9052_regulator_info[i];
|
|
if (info->reg_desc.id == id)
|
|
return info;
|
|
}
|
|
break;
|
|
case DA9053_AA:
|
|
case DA9053_BA:
|
|
case DA9053_BB:
|
|
for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
|
|
info = &da9053_regulator_info[i];
|
|
if (info->reg_desc.id == id)
|
|
return info;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int __devinit da9052_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct da9052_regulator *regulator;
|
|
struct da9052 *da9052;
|
|
struct da9052_pdata *pdata;
|
|
int ret;
|
|
|
|
regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
|
|
GFP_KERNEL);
|
|
if (!regulator)
|
|
return -ENOMEM;
|
|
|
|
da9052 = dev_get_drvdata(pdev->dev.parent);
|
|
pdata = da9052->dev->platform_data;
|
|
regulator->da9052 = da9052;
|
|
|
|
regulator->info = find_regulator_info(regulator->da9052->chip_id,
|
|
pdev->id);
|
|
if (regulator->info == NULL) {
|
|
dev_err(&pdev->dev, "invalid regulator ID specified\n");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
regulator->rdev = regulator_register(®ulator->info->reg_desc,
|
|
&pdev->dev,
|
|
pdata->regulators[pdev->id],
|
|
regulator, NULL);
|
|
if (IS_ERR(regulator->rdev)) {
|
|
dev_err(&pdev->dev, "failed to register regulator %s\n",
|
|
regulator->info->reg_desc.name);
|
|
ret = PTR_ERR(regulator->rdev);
|
|
goto err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, regulator);
|
|
|
|
return 0;
|
|
err:
|
|
devm_kfree(&pdev->dev, regulator);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit da9052_regulator_remove(struct platform_device *pdev)
|
|
{
|
|
struct da9052_regulator *regulator = platform_get_drvdata(pdev);
|
|
|
|
regulator_unregister(regulator->rdev);
|
|
devm_kfree(&pdev->dev, regulator);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver da9052_regulator_driver = {
|
|
.probe = da9052_regulator_probe,
|
|
.remove = __devexit_p(da9052_regulator_remove),
|
|
.driver = {
|
|
.name = "da9052-regulator",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
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");
|