626 lines
15 KiB
C
626 lines
15 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* License Terms: GNU General Public License v2
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*
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* Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
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* Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
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*
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* AB8500 peripheral regulators
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*
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* AB8500 supports the following regulators:
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* VAUX1/2/3, VINTCORE, VTVOUT, VAUDIO, VAMIC1/2, VDMIC, VANA
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/ab8500.h>
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#include <linux/mfd/abx500.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/ab8500.h>
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/**
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* struct ab8500_regulator_info - ab8500 regulator information
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* @dev: device pointer
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* @desc: regulator description
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* @regulator_dev: regulator device
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* @max_uV: maximum voltage (for variable voltage supplies)
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* @min_uV: minimum voltage (for variable voltage supplies)
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* @fixed_uV: typical voltage (for fixed voltage supplies)
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* @update_bank: bank to control on/off
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* @update_reg: register to control on/off
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* @update_mask: mask to enable/disable regulator
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* @update_val_enable: bits to enable the regulator in normal (high power) mode
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* @voltage_bank: bank to control regulator voltage
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* @voltage_reg: register to control regulator voltage
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* @voltage_mask: mask to control regulator voltage
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* @voltages: supported voltage table
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* @voltages_len: number of supported voltages for the regulator
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*/
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struct ab8500_regulator_info {
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struct device *dev;
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struct regulator_desc desc;
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struct regulator_dev *regulator;
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int max_uV;
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int min_uV;
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int fixed_uV;
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u8 update_bank;
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u8 update_reg;
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u8 update_mask;
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u8 update_val_enable;
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u8 voltage_bank;
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u8 voltage_reg;
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u8 voltage_mask;
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int const *voltages;
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int voltages_len;
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};
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/* voltage tables for the vauxn/vintcore supplies */
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static const int ldo_vauxn_voltages[] = {
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1100000,
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1200000,
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1300000,
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1400000,
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1500000,
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1800000,
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1850000,
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1900000,
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2500000,
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2650000,
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2700000,
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2750000,
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2800000,
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2900000,
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3000000,
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3300000,
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};
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static const int ldo_vaux3_voltages[] = {
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1200000,
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1500000,
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1800000,
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2100000,
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2500000,
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2750000,
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2790000,
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2910000,
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};
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static const int ldo_vintcore_voltages[] = {
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1200000,
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1225000,
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1250000,
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1275000,
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1300000,
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1325000,
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1350000,
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};
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static int ab8500_regulator_enable(struct regulator_dev *rdev)
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{
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int ret;
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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if (info == NULL) {
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dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
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return -EINVAL;
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}
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ret = abx500_mask_and_set_register_interruptible(info->dev,
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info->update_bank, info->update_reg,
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info->update_mask, info->update_val_enable);
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if (ret < 0)
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dev_err(rdev_get_dev(rdev),
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"couldn't set enable bits for regulator\n");
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dev_vdbg(rdev_get_dev(rdev),
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"%s-enable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
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info->desc.name, info->update_bank, info->update_reg,
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info->update_mask, info->update_val_enable);
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return ret;
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}
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static int ab8500_regulator_disable(struct regulator_dev *rdev)
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{
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int ret;
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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if (info == NULL) {
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dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
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return -EINVAL;
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}
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ret = abx500_mask_and_set_register_interruptible(info->dev,
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info->update_bank, info->update_reg,
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info->update_mask, 0x0);
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if (ret < 0)
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dev_err(rdev_get_dev(rdev),
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"couldn't set disable bits for regulator\n");
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dev_vdbg(rdev_get_dev(rdev),
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"%s-disable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
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info->desc.name, info->update_bank, info->update_reg,
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info->update_mask, 0x0);
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return ret;
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}
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static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
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{
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int ret;
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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u8 regval;
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if (info == NULL) {
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dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
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return -EINVAL;
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}
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ret = abx500_get_register_interruptible(info->dev,
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info->update_bank, info->update_reg, ®val);
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if (ret < 0) {
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dev_err(rdev_get_dev(rdev),
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"couldn't read 0x%x register\n", info->update_reg);
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return ret;
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}
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dev_vdbg(rdev_get_dev(rdev),
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"%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
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" 0x%x\n",
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info->desc.name, info->update_bank, info->update_reg,
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info->update_mask, regval);
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if (regval & info->update_mask)
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return true;
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else
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return false;
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}
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static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
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{
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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if (info == NULL) {
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dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
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return -EINVAL;
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}
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/* return the uV for the fixed regulators */
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if (info->fixed_uV)
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return info->fixed_uV;
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if (selector >= info->voltages_len)
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return -EINVAL;
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return info->voltages[selector];
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}
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static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
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{
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int ret, val;
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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u8 regval;
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if (info == NULL) {
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dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
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return -EINVAL;
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}
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ret = abx500_get_register_interruptible(info->dev,
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info->voltage_bank, info->voltage_reg, ®val);
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if (ret < 0) {
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dev_err(rdev_get_dev(rdev),
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"couldn't read voltage reg for regulator\n");
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return ret;
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}
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dev_vdbg(rdev_get_dev(rdev),
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"%s-get_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
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" 0x%x\n",
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info->desc.name, info->voltage_bank, info->voltage_reg,
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info->voltage_mask, regval);
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/* vintcore has a different layout */
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val = regval & info->voltage_mask;
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if (info->desc.id == AB8500_LDO_INTCORE)
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ret = info->voltages[val >> 0x3];
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else
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ret = info->voltages[val];
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return ret;
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}
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static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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int i;
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/* check the supported voltage */
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for (i = 0; i < info->voltages_len; i++) {
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if ((info->voltages[i] >= min_uV) &&
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(info->voltages[i] <= max_uV))
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return i;
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}
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return -EINVAL;
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}
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static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV,
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unsigned *selector)
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{
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int ret;
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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u8 regval;
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if (info == NULL) {
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dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
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return -EINVAL;
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}
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/* get the appropriate voltages within the range */
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ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
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if (ret < 0) {
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dev_err(rdev_get_dev(rdev),
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"couldn't get best voltage for regulator\n");
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return ret;
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}
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*selector = ret;
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/* set the registers for the request */
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regval = (u8)ret;
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ret = abx500_mask_and_set_register_interruptible(info->dev,
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info->voltage_bank, info->voltage_reg,
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info->voltage_mask, regval);
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if (ret < 0)
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dev_err(rdev_get_dev(rdev),
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"couldn't set voltage reg for regulator\n");
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dev_vdbg(rdev_get_dev(rdev),
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"%s-set_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
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" 0x%x\n",
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info->desc.name, info->voltage_bank, info->voltage_reg,
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info->voltage_mask, regval);
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return ret;
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}
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static struct regulator_ops ab8500_regulator_ops = {
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.enable = ab8500_regulator_enable,
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.disable = ab8500_regulator_disable,
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.is_enabled = ab8500_regulator_is_enabled,
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.get_voltage = ab8500_regulator_get_voltage,
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.set_voltage = ab8500_regulator_set_voltage,
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.list_voltage = ab8500_list_voltage,
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};
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static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
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{
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struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
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if (info == NULL) {
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dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
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return -EINVAL;
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}
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return info->fixed_uV;
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}
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static struct regulator_ops ab8500_regulator_fixed_ops = {
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.enable = ab8500_regulator_enable,
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.disable = ab8500_regulator_disable,
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.is_enabled = ab8500_regulator_is_enabled,
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.get_voltage = ab8500_fixed_get_voltage,
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.list_voltage = ab8500_list_voltage,
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};
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static struct ab8500_regulator_info
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ab8500_regulator_info[AB8500_NUM_REGULATORS] = {
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/*
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* Variable Voltage Regulators
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* name, min mV, max mV,
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* update bank, reg, mask, enable val
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* volt bank, reg, mask, table, table length
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*/
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[AB8500_LDO_AUX1] = {
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.desc = {
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.name = "LDO-AUX1",
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.ops = &ab8500_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_AUX1,
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.owner = THIS_MODULE,
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.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
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},
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.min_uV = 1100000,
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.max_uV = 3300000,
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.update_bank = 0x04,
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.update_reg = 0x09,
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.update_mask = 0x03,
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.update_val_enable = 0x01,
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.voltage_bank = 0x04,
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.voltage_reg = 0x1f,
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.voltage_mask = 0x0f,
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.voltages = ldo_vauxn_voltages,
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.voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
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},
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[AB8500_LDO_AUX2] = {
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.desc = {
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.name = "LDO-AUX2",
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.ops = &ab8500_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_AUX2,
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.owner = THIS_MODULE,
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.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
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},
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.min_uV = 1100000,
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.max_uV = 3300000,
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.update_bank = 0x04,
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.update_reg = 0x09,
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.update_mask = 0x0c,
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.update_val_enable = 0x04,
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.voltage_bank = 0x04,
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.voltage_reg = 0x20,
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.voltage_mask = 0x0f,
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.voltages = ldo_vauxn_voltages,
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.voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
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},
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[AB8500_LDO_AUX3] = {
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.desc = {
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.name = "LDO-AUX3",
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.ops = &ab8500_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_AUX3,
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.owner = THIS_MODULE,
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.n_voltages = ARRAY_SIZE(ldo_vaux3_voltages),
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},
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.min_uV = 1100000,
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.max_uV = 3300000,
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.update_bank = 0x04,
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.update_reg = 0x0a,
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.update_mask = 0x03,
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.update_val_enable = 0x01,
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.voltage_bank = 0x04,
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.voltage_reg = 0x21,
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.voltage_mask = 0x07,
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.voltages = ldo_vaux3_voltages,
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.voltages_len = ARRAY_SIZE(ldo_vaux3_voltages),
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},
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[AB8500_LDO_INTCORE] = {
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.desc = {
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.name = "LDO-INTCORE",
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.ops = &ab8500_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_INTCORE,
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.owner = THIS_MODULE,
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.n_voltages = ARRAY_SIZE(ldo_vintcore_voltages),
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},
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.min_uV = 1100000,
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.max_uV = 3300000,
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.update_bank = 0x03,
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.update_reg = 0x80,
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.update_mask = 0x44,
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.update_val_enable = 0x04,
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.voltage_bank = 0x03,
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.voltage_reg = 0x80,
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.voltage_mask = 0x38,
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.voltages = ldo_vintcore_voltages,
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.voltages_len = ARRAY_SIZE(ldo_vintcore_voltages),
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},
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/*
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* Fixed Voltage Regulators
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* name, fixed mV,
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* update bank, reg, mask, enable val
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*/
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[AB8500_LDO_TVOUT] = {
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.desc = {
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.name = "LDO-TVOUT",
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.ops = &ab8500_regulator_fixed_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_TVOUT,
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.owner = THIS_MODULE,
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.n_voltages = 1,
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},
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.fixed_uV = 2000000,
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.update_bank = 0x03,
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.update_reg = 0x80,
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.update_mask = 0x82,
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.update_val_enable = 0x02,
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},
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[AB8500_LDO_AUDIO] = {
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.desc = {
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.name = "LDO-AUDIO",
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.ops = &ab8500_regulator_fixed_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_AUDIO,
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.owner = THIS_MODULE,
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.n_voltages = 1,
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},
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.fixed_uV = 2000000,
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.update_bank = 0x03,
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.update_reg = 0x83,
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.update_mask = 0x02,
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.update_val_enable = 0x02,
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},
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[AB8500_LDO_ANAMIC1] = {
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.desc = {
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.name = "LDO-ANAMIC1",
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.ops = &ab8500_regulator_fixed_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_ANAMIC1,
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.owner = THIS_MODULE,
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.n_voltages = 1,
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},
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.fixed_uV = 2050000,
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.update_bank = 0x03,
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.update_reg = 0x83,
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.update_mask = 0x08,
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.update_val_enable = 0x08,
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},
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[AB8500_LDO_ANAMIC2] = {
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.desc = {
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.name = "LDO-ANAMIC2",
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.ops = &ab8500_regulator_fixed_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_ANAMIC2,
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.owner = THIS_MODULE,
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.n_voltages = 1,
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},
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.fixed_uV = 2050000,
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.update_bank = 0x03,
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.update_reg = 0x83,
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.update_mask = 0x10,
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.update_val_enable = 0x10,
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},
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[AB8500_LDO_DMIC] = {
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.desc = {
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.name = "LDO-DMIC",
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.ops = &ab8500_regulator_fixed_ops,
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.type = REGULATOR_VOLTAGE,
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.id = AB8500_LDO_DMIC,
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.owner = THIS_MODULE,
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.n_voltages = 1,
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},
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.fixed_uV = 1800000,
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.update_bank = 0x03,
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.update_reg = 0x83,
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.update_mask = 0x04,
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.update_val_enable = 0x04,
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},
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[AB8500_LDO_ANA] = {
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.desc = {
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.name = "LDO-ANA",
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.ops = &ab8500_regulator_fixed_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.id = AB8500_LDO_ANA,
|
|
.owner = THIS_MODULE,
|
|
.n_voltages = 1,
|
|
},
|
|
.fixed_uV = 1200000,
|
|
.update_bank = 0x04,
|
|
.update_reg = 0x06,
|
|
.update_mask = 0x0c,
|
|
.update_val_enable = 0x04,
|
|
},
|
|
|
|
|
|
};
|
|
|
|
static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
|
|
struct ab8500_platform_data *pdata;
|
|
int i, err;
|
|
|
|
if (!ab8500) {
|
|
dev_err(&pdev->dev, "null mfd parent\n");
|
|
return -EINVAL;
|
|
}
|
|
pdata = dev_get_platdata(ab8500->dev);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "null pdata\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* make sure the platform data has the correct size */
|
|
if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) {
|
|
dev_err(&pdev->dev, "platform configuration error\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* register all regulators */
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
|
|
struct ab8500_regulator_info *info = NULL;
|
|
|
|
/* assign per-regulator data */
|
|
info = &ab8500_regulator_info[i];
|
|
info->dev = &pdev->dev;
|
|
|
|
/* fix for hardware before ab8500v2.0 */
|
|
if (abx500_get_chip_id(info->dev) < 0x20) {
|
|
if (info->desc.id == AB8500_LDO_AUX3) {
|
|
info->desc.n_voltages =
|
|
ARRAY_SIZE(ldo_vauxn_voltages);
|
|
info->voltages = ldo_vauxn_voltages;
|
|
info->voltages_len =
|
|
ARRAY_SIZE(ldo_vauxn_voltages);
|
|
info->voltage_mask = 0xf;
|
|
}
|
|
}
|
|
|
|
/* register regulator with framework */
|
|
info->regulator = regulator_register(&info->desc, &pdev->dev,
|
|
&pdata->regulator[i], info);
|
|
if (IS_ERR(info->regulator)) {
|
|
err = PTR_ERR(info->regulator);
|
|
dev_err(&pdev->dev, "failed to register regulator %s\n",
|
|
info->desc.name);
|
|
/* when we fail, un-register all earlier regulators */
|
|
while (--i >= 0) {
|
|
info = &ab8500_regulator_info[i];
|
|
regulator_unregister(info->regulator);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
dev_vdbg(rdev_get_dev(info->regulator),
|
|
"%s-probed\n", info->desc.name);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
|
|
struct ab8500_regulator_info *info = NULL;
|
|
info = &ab8500_regulator_info[i];
|
|
|
|
dev_vdbg(rdev_get_dev(info->regulator),
|
|
"%s-remove\n", info->desc.name);
|
|
|
|
regulator_unregister(info->regulator);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ab8500_regulator_driver = {
|
|
.probe = ab8500_regulator_probe,
|
|
.remove = __devexit_p(ab8500_regulator_remove),
|
|
.driver = {
|
|
.name = "ab8500-regulator",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init ab8500_regulator_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_driver_register(&ab8500_regulator_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register ab8500 regulator: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
subsys_initcall(ab8500_regulator_init);
|
|
|
|
static void __exit ab8500_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&ab8500_regulator_driver);
|
|
}
|
|
module_exit(ab8500_regulator_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
|
|
MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
|
|
MODULE_ALIAS("platform:ab8500-regulator");
|