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597 lines
15 KiB
597 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// Regulator driver for DA9055 PMIC |
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// |
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// Copyright(c) 2012 Dialog Semiconductor Ltd. |
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// |
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// Author: David Dajun Chen <[email protected]> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/gpio.h> |
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#include <linux/gpio/consumer.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/of.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/mfd/da9055/core.h> |
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#include <linux/mfd/da9055/reg.h> |
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#include <linux/mfd/da9055/pdata.h> |
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#define DA9055_MIN_UA 0 |
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#define DA9055_MAX_UA 3 |
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#define DA9055_LDO_MODE_SYNC 0 |
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#define DA9055_LDO_MODE_SLEEP 1 |
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#define DA9055_BUCK_MODE_SLEEP 1 |
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#define DA9055_BUCK_MODE_SYNC 2 |
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#define DA9055_BUCK_MODE_AUTO 3 |
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/* DA9055 REGULATOR IDs */ |
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#define DA9055_ID_BUCK1 0 |
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#define DA9055_ID_BUCK2 1 |
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#define DA9055_ID_LDO1 2 |
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#define DA9055_ID_LDO2 3 |
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#define DA9055_ID_LDO3 4 |
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#define DA9055_ID_LDO4 5 |
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#define DA9055_ID_LDO5 6 |
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#define DA9055_ID_LDO6 7 |
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/* DA9055 BUCK current limit */ |
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static const unsigned int da9055_current_limits[] = { |
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500000, 600000, 700000, 800000 |
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}; |
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struct da9055_conf_reg { |
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int reg; |
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int sel_mask; |
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int en_mask; |
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}; |
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struct da9055_volt_reg { |
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int reg_a; |
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int reg_b; |
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int sl_shift; |
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int v_mask; |
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}; |
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struct da9055_mode_reg { |
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int reg; |
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int mask; |
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int shift; |
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}; |
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struct da9055_regulator_info { |
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struct regulator_desc reg_desc; |
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struct da9055_conf_reg conf; |
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struct da9055_volt_reg volt; |
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struct da9055_mode_reg mode; |
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}; |
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struct da9055_regulator { |
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struct da9055 *da9055; |
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struct da9055_regulator_info *info; |
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struct regulator_dev *rdev; |
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enum gpio_select reg_rselect; |
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}; |
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static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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int ret, mode = 0; |
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ret = da9055_reg_read(regulator->da9055, info->mode.reg); |
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if (ret < 0) |
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return ret; |
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switch ((ret & info->mode.mask) >> info->mode.shift) { |
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case DA9055_BUCK_MODE_SYNC: |
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mode = REGULATOR_MODE_FAST; |
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break; |
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case DA9055_BUCK_MODE_AUTO: |
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mode = REGULATOR_MODE_NORMAL; |
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break; |
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case DA9055_BUCK_MODE_SLEEP: |
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mode = REGULATOR_MODE_STANDBY; |
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break; |
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} |
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return mode; |
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} |
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static int da9055_buck_set_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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int val = 0; |
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switch (mode) { |
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case REGULATOR_MODE_FAST: |
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val = DA9055_BUCK_MODE_SYNC << info->mode.shift; |
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break; |
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case REGULATOR_MODE_NORMAL: |
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val = DA9055_BUCK_MODE_AUTO << info->mode.shift; |
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break; |
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case REGULATOR_MODE_STANDBY: |
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val = DA9055_BUCK_MODE_SLEEP << info->mode.shift; |
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break; |
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} |
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return da9055_reg_update(regulator->da9055, info->mode.reg, |
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info->mode.mask, val); |
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} |
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static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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int ret; |
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ret = da9055_reg_read(regulator->da9055, info->volt.reg_b); |
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if (ret < 0) |
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return ret; |
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if (ret >> info->volt.sl_shift) |
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return REGULATOR_MODE_STANDBY; |
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else |
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return REGULATOR_MODE_NORMAL; |
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} |
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static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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struct da9055_volt_reg volt = info->volt; |
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int val = 0; |
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switch (mode) { |
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case REGULATOR_MODE_NORMAL: |
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case REGULATOR_MODE_FAST: |
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val = DA9055_LDO_MODE_SYNC; |
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break; |
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case REGULATOR_MODE_STANDBY: |
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val = DA9055_LDO_MODE_SLEEP; |
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break; |
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} |
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return da9055_reg_update(regulator->da9055, volt.reg_b, |
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1 << volt.sl_shift, |
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val << volt.sl_shift); |
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} |
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static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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struct da9055_volt_reg volt = info->volt; |
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int ret, sel; |
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/* |
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* There are two voltage register set A & B for voltage ramping but |
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* either one of then can be active therefore we first determine |
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* the active register set. |
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*/ |
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ret = da9055_reg_read(regulator->da9055, info->conf.reg); |
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if (ret < 0) |
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return ret; |
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ret &= info->conf.sel_mask; |
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/* Get the voltage for the active register set A/B */ |
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if (ret == DA9055_REGUALTOR_SET_A) |
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ret = da9055_reg_read(regulator->da9055, volt.reg_a); |
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else |
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ret = da9055_reg_read(regulator->da9055, volt.reg_b); |
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if (ret < 0) |
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return ret; |
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sel = (ret & volt.v_mask); |
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return sel; |
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} |
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static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev, |
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unsigned int selector) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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int ret; |
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/* |
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* Regulator register set A/B is not selected through GPIO therefore |
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* we use default register set A for voltage ramping. |
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*/ |
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if (regulator->reg_rselect == NO_GPIO) { |
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/* Select register set A */ |
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ret = da9055_reg_update(regulator->da9055, info->conf.reg, |
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info->conf.sel_mask, DA9055_SEL_REG_A); |
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if (ret < 0) |
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return ret; |
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/* Set the voltage */ |
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return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
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info->volt.v_mask, selector); |
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} |
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/* |
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* Here regulator register set A/B is selected through GPIO. |
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* Therefore we first determine the selected register set A/B and |
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* then set the desired voltage for that register set A/B. |
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*/ |
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ret = da9055_reg_read(regulator->da9055, info->conf.reg); |
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if (ret < 0) |
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return ret; |
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ret &= info->conf.sel_mask; |
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/* Set the voltage */ |
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if (ret == DA9055_REGUALTOR_SET_A) |
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return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
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info->volt.v_mask, selector); |
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else |
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return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
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info->volt.v_mask, selector); |
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} |
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static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev, |
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int uV) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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int ret; |
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/* Select register set B for suspend voltage ramping. */ |
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if (regulator->reg_rselect == NO_GPIO) { |
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ret = da9055_reg_update(regulator->da9055, info->conf.reg, |
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info->conf.sel_mask, DA9055_SEL_REG_B); |
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if (ret < 0) |
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return ret; |
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} |
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ret = regulator_map_voltage_linear(rdev, uV, uV); |
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if (ret < 0) |
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return ret; |
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return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
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info->volt.v_mask, ret); |
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} |
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static int da9055_suspend_enable(struct regulator_dev *rdev) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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/* Select register set B for voltage ramping. */ |
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if (regulator->reg_rselect == NO_GPIO) |
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return da9055_reg_update(regulator->da9055, info->conf.reg, |
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info->conf.sel_mask, DA9055_SEL_REG_B); |
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else |
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return 0; |
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} |
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static int da9055_suspend_disable(struct regulator_dev *rdev) |
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{ |
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struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
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struct da9055_regulator_info *info = regulator->info; |
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/* Diselect register set B. */ |
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if (regulator->reg_rselect == NO_GPIO) |
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return da9055_reg_update(regulator->da9055, info->conf.reg, |
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info->conf.sel_mask, DA9055_SEL_REG_A); |
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else |
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return 0; |
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} |
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static const struct regulator_ops da9055_buck_ops = { |
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.get_mode = da9055_buck_get_mode, |
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.set_mode = da9055_buck_set_mode, |
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.get_current_limit = regulator_get_current_limit_regmap, |
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.set_current_limit = regulator_set_current_limit_regmap, |
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.get_voltage_sel = da9055_regulator_get_voltage_sel, |
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.set_voltage_sel = da9055_regulator_set_voltage_sel, |
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.list_voltage = regulator_list_voltage_linear, |
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.map_voltage = regulator_map_voltage_linear, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.set_suspend_voltage = da9055_regulator_set_suspend_voltage, |
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.set_suspend_enable = da9055_suspend_enable, |
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.set_suspend_disable = da9055_suspend_disable, |
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.set_suspend_mode = da9055_buck_set_mode, |
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}; |
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static const struct regulator_ops da9055_ldo_ops = { |
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.get_mode = da9055_ldo_get_mode, |
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.set_mode = da9055_ldo_set_mode, |
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.get_voltage_sel = da9055_regulator_get_voltage_sel, |
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.set_voltage_sel = da9055_regulator_set_voltage_sel, |
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.list_voltage = regulator_list_voltage_linear, |
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.map_voltage = regulator_map_voltage_linear, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.set_suspend_voltage = da9055_regulator_set_suspend_voltage, |
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.set_suspend_enable = da9055_suspend_enable, |
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.set_suspend_disable = da9055_suspend_disable, |
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.set_suspend_mode = da9055_ldo_set_mode, |
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}; |
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#define DA9055_LDO(_id, step, min, max, vbits, voffset) \ |
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{\ |
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.reg_desc = {\ |
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.name = #_id,\ |
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.of_match = of_match_ptr(#_id),\ |
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.regulators_node = of_match_ptr("regulators"),\ |
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.ops = &da9055_ldo_ops,\ |
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.type = REGULATOR_VOLTAGE,\ |
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.id = DA9055_ID_##_id,\ |
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.n_voltages = (max - min) / step + 1 + (voffset), \ |
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.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
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.enable_mask = 1, \ |
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.min_uV = (min) * 1000,\ |
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.uV_step = (step) * 1000,\ |
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.linear_min_sel = (voffset),\ |
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.owner = THIS_MODULE,\ |
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},\ |
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.conf = {\ |
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.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
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.sel_mask = (1 << 4),\ |
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.en_mask = 1,\ |
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},\ |
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.volt = {\ |
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.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ |
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.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ |
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.sl_shift = 7,\ |
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.v_mask = (1 << (vbits)) - 1,\ |
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},\ |
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} |
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#define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \ |
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{\ |
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.reg_desc = {\ |
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.name = #_id,\ |
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.of_match = of_match_ptr(#_id),\ |
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.regulators_node = of_match_ptr("regulators"),\ |
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.ops = &da9055_buck_ops,\ |
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.type = REGULATOR_VOLTAGE,\ |
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.id = DA9055_ID_##_id,\ |
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.n_voltages = (max - min) / step + 1 + (voffset), \ |
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.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
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.enable_mask = 1,\ |
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.min_uV = (min) * 1000,\ |
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.uV_step = (step) * 1000,\ |
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.linear_min_sel = (voffset),\ |
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.owner = THIS_MODULE,\ |
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.curr_table = da9055_current_limits,\ |
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.n_current_limits = ARRAY_SIZE(da9055_current_limits),\ |
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.csel_reg = DA9055_REG_BUCK_LIM,\ |
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.csel_mask = (mbits),\ |
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},\ |
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.conf = {\ |
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.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
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.sel_mask = (1 << 4),\ |
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.en_mask = 1,\ |
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},\ |
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.volt = {\ |
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.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ |
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.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ |
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.sl_shift = 7,\ |
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.v_mask = (1 << (vbits)) - 1,\ |
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},\ |
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.mode = {\ |
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.reg = DA9055_REG_BCORE_MODE,\ |
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.mask = (mbits),\ |
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.shift = (sbits),\ |
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},\ |
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} |
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static struct da9055_regulator_info da9055_regulator_info[] = { |
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DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2), |
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DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0), |
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DA9055_LDO(LDO1, 50, 900, 3300, 6, 2), |
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DA9055_LDO(LDO2, 50, 900, 3300, 6, 3), |
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DA9055_LDO(LDO3, 50, 900, 3300, 6, 2), |
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DA9055_LDO(LDO4, 50, 900, 3300, 6, 2), |
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DA9055_LDO(LDO5, 50, 900, 2750, 6, 2), |
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DA9055_LDO(LDO6, 20, 900, 3300, 7, 0), |
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}; |
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|
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/* |
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* Configures regulator to be controlled either through GPIO 1 or 2. |
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* GPIO can control regulator state and/or select the regulator register |
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* set A/B for voltage ramping. |
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*/ |
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static int da9055_gpio_init(struct da9055_regulator *regulator, |
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struct regulator_config *config, |
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struct da9055_pdata *pdata, int id) |
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{ |
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struct da9055_regulator_info *info = regulator->info; |
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int ret = 0; |
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if (!pdata) |
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return 0; |
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if (pdata->gpio_ren && pdata->gpio_ren[id]) { |
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char name[18]; |
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int gpio_mux = pdata->gpio_ren[id]; |
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config->ena_gpiod = pdata->ena_gpiods[id]; |
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/* |
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* GPI pin is muxed with regulator to control the |
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* regulator state. |
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*/ |
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sprintf(name, "DA9055 GPI %d", gpio_mux); |
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ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, |
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name); |
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if (ret < 0) |
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goto err; |
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/* |
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* Let the regulator know that its state is controlled |
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* through GPI. |
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*/ |
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ret = da9055_reg_update(regulator->da9055, info->conf.reg, |
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DA9055_E_GPI_MASK, |
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pdata->reg_ren[id] |
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<< DA9055_E_GPI_SHIFT); |
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if (ret < 0) |
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goto err; |
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} |
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if (pdata->gpio_rsel && pdata->gpio_rsel[id]) { |
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char name[18]; |
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int gpio_mux = pdata->gpio_rsel[id]; |
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regulator->reg_rselect = pdata->reg_rsel[id]; |
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/* |
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* GPI pin is muxed with regulator to select the |
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* regulator register set A/B for voltage ramping. |
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*/ |
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sprintf(name, "DA9055 GPI %d", gpio_mux); |
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ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, |
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name); |
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if (ret < 0) |
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goto err; |
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/* |
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* Let the regulator know that its register set A/B |
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* will be selected through GPI for voltage ramping. |
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*/ |
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ret = da9055_reg_update(regulator->da9055, info->conf.reg, |
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DA9055_V_GPI_MASK, |
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pdata->reg_rsel[id] |
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<< DA9055_V_GPI_SHIFT); |
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} |
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err: |
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return ret; |
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} |
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static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data) |
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{ |
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struct da9055_regulator *regulator = data; |
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regulator_notifier_call_chain(regulator->rdev, |
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REGULATOR_EVENT_OVER_CURRENT, NULL); |
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return IRQ_HANDLED; |
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} |
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static inline struct da9055_regulator_info *find_regulator_info(int id) |
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{ |
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struct da9055_regulator_info *info; |
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int i; |
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for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) { |
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info = &da9055_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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return NULL; |
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} |
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|
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static int da9055_regulator_probe(struct platform_device *pdev) |
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{ |
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struct regulator_config config = { }; |
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struct da9055_regulator *regulator; |
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struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent); |
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struct da9055_pdata *pdata = dev_get_platdata(da9055->dev); |
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int ret, irq; |
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regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator), |
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GFP_KERNEL); |
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if (!regulator) |
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return -ENOMEM; |
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regulator->info = find_regulator_info(pdev->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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regulator->da9055 = da9055; |
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config.dev = da9055->dev; |
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config.driver_data = regulator; |
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config.regmap = da9055->regmap; |
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|
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if (pdata) |
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config.init_data = pdata->regulators[pdev->id]; |
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|
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ret = da9055_gpio_init(regulator, &config, pdata, pdev->id); |
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if (ret < 0) |
|
return ret; |
|
|
|
regulator->rdev = devm_regulator_register(&pdev->dev, |
|
®ulator->info->reg_desc, |
|
&config); |
|
if (IS_ERR(regulator->rdev)) { |
|
dev_err(&pdev->dev, "Failed to register regulator %s\n", |
|
regulator->info->reg_desc.name); |
|
return PTR_ERR(regulator->rdev); |
|
} |
|
|
|
/* Only LDO 5 and 6 has got the over current interrupt */ |
|
if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) { |
|
irq = platform_get_irq_byname(pdev, "REGULATOR"); |
|
if (irq < 0) |
|
return irq; |
|
|
|
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
|
da9055_ldo5_6_oc_irq, |
|
IRQF_TRIGGER_HIGH | |
|
IRQF_ONESHOT | |
|
IRQF_PROBE_SHARED, |
|
pdev->name, regulator); |
|
if (ret != 0) { |
|
if (ret != -EBUSY) { |
|
dev_err(&pdev->dev, |
|
"Failed to request Regulator IRQ %d: %d\n", |
|
irq, ret); |
|
return ret; |
|
} |
|
} |
|
} |
|
|
|
platform_set_drvdata(pdev, regulator); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver da9055_regulator_driver = { |
|
.probe = da9055_regulator_probe, |
|
.driver = { |
|
.name = "da9055-regulator", |
|
}, |
|
}; |
|
|
|
static int __init da9055_regulator_init(void) |
|
{ |
|
return platform_driver_register(&da9055_regulator_driver); |
|
} |
|
subsys_initcall(da9055_regulator_init); |
|
|
|
static void __exit da9055_regulator_exit(void) |
|
{ |
|
platform_driver_unregister(&da9055_regulator_driver); |
|
} |
|
module_exit(da9055_regulator_exit); |
|
|
|
MODULE_AUTHOR("David Dajun Chen <[email protected]>"); |
|
MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("platform:da9055-regulator");
|
|
|