mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 09:08:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
467
drivers/regulator/helpers.c
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467
drivers/regulator/helpers.c
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/*
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* helpers.c -- Voltage/Current Regulator framework helper functions.
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*
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* Copyright 2007, 2008 Wolfson Microelectronics PLC.
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* Copyright 2008 SlimLogic Ltd.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/regulator/driver.h>
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#include <linux/module.h>
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/**
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* regulator_is_enabled_regmap - standard is_enabled() for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* enable_reg and enable_mask fields in their descriptor and then use
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* this as their is_enabled operation, saving some code.
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*/
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int regulator_is_enabled_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
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if (ret != 0)
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return ret;
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val &= rdev->desc->enable_mask;
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if (rdev->desc->enable_is_inverted) {
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if (rdev->desc->enable_val)
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return val != rdev->desc->enable_val;
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return val == 0;
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} else {
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if (rdev->desc->enable_val)
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return val == rdev->desc->enable_val;
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return val != 0;
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}
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}
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EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap);
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/**
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* regulator_enable_regmap - standard enable() for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* enable_reg and enable_mask fields in their descriptor and then use
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* this as their enable() operation, saving some code.
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*/
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int regulator_enable_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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if (rdev->desc->enable_is_inverted) {
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val = rdev->desc->disable_val;
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} else {
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val = rdev->desc->enable_val;
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if (!val)
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val = rdev->desc->enable_mask;
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}
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask, val);
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}
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EXPORT_SYMBOL_GPL(regulator_enable_regmap);
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/**
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* regulator_disable_regmap - standard disable() for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* enable_reg and enable_mask fields in their descriptor and then use
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* this as their disable() operation, saving some code.
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*/
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int regulator_disable_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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if (rdev->desc->enable_is_inverted) {
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val = rdev->desc->enable_val;
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if (!val)
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val = rdev->desc->enable_mask;
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} else {
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val = rdev->desc->disable_val;
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}
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask, val);
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}
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EXPORT_SYMBOL_GPL(regulator_disable_regmap);
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/**
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* regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* vsel_reg and vsel_mask fields in their descriptor and then use this
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* as their get_voltage_vsel operation, saving some code.
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*/
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int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
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if (ret != 0)
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return ret;
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val &= rdev->desc->vsel_mask;
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val >>= ffs(rdev->desc->vsel_mask) - 1;
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return val;
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}
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EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap);
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/**
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* regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users
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*
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* @rdev: regulator to operate on
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* @sel: Selector to set
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*
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* Regulators that use regmap for their register I/O can set the
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* vsel_reg and vsel_mask fields in their descriptor and then use this
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* as their set_voltage_vsel operation, saving some code.
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*/
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int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
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{
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int ret;
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sel <<= ffs(rdev->desc->vsel_mask) - 1;
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ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
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rdev->desc->vsel_mask, sel);
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if (ret)
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return ret;
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if (rdev->desc->apply_bit)
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ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
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rdev->desc->apply_bit,
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rdev->desc->apply_bit);
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap);
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/**
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* regulator_map_voltage_iterate - map_voltage() based on list_voltage()
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers implementing set_voltage_sel() and list_voltage() can use
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* this as their map_voltage() operation. It will find a suitable
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* voltage by calling list_voltage() until it gets something in bounds
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* for the requested voltages.
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*/
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int regulator_map_voltage_iterate(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int best_val = INT_MAX;
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int selector = 0;
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int i, ret;
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/* Find the smallest voltage that falls within the specified
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* range.
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*/
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for (i = 0; i < rdev->desc->n_voltages; i++) {
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ret = rdev->desc->ops->list_voltage(rdev, i);
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if (ret < 0)
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continue;
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if (ret < best_val && ret >= min_uV && ret <= max_uV) {
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best_val = ret;
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selector = i;
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}
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}
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if (best_val != INT_MAX)
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return selector;
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else
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate);
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/**
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* regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers that have ascendant voltage list can use this as their
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* map_voltage() operation.
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*/
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int regulator_map_voltage_ascend(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int i, ret;
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for (i = 0; i < rdev->desc->n_voltages; i++) {
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ret = rdev->desc->ops->list_voltage(rdev, i);
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if (ret < 0)
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continue;
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if (ret > max_uV)
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break;
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if (ret >= min_uV && ret <= 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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EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
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/**
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* regulator_map_voltage_linear - map_voltage() for simple linear mappings
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers providing min_uV and uV_step in their regulator_desc can
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* use this as their map_voltage() operation.
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*/
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int regulator_map_voltage_linear(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int ret, voltage;
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/* Allow uV_step to be 0 for fixed voltage */
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if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
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if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
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return 0;
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else
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return -EINVAL;
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}
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if (!rdev->desc->uV_step) {
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BUG_ON(!rdev->desc->uV_step);
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return -EINVAL;
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}
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if (min_uV < rdev->desc->min_uV)
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min_uV = rdev->desc->min_uV;
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ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
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if (ret < 0)
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return ret;
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ret += rdev->desc->linear_min_sel;
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/* Map back into a voltage to verify we're still in bounds */
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voltage = rdev->desc->ops->list_voltage(rdev, ret);
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if (voltage < min_uV || voltage > max_uV)
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return -EINVAL;
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
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/**
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* regulator_map_voltage_linear - map_voltage() for multiple linear ranges
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers providing linear_ranges in their descriptor can use this as
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* their map_voltage() callback.
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*/
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int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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const struct regulator_linear_range *range;
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int ret = -EINVAL;
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int voltage, i;
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if (!rdev->desc->n_linear_ranges) {
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BUG_ON(!rdev->desc->n_linear_ranges);
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return -EINVAL;
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}
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for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
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int linear_max_uV;
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range = &rdev->desc->linear_ranges[i];
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linear_max_uV = range->min_uV +
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(range->max_sel - range->min_sel) * range->uV_step;
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if (!(min_uV <= linear_max_uV && max_uV >= range->min_uV))
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continue;
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if (min_uV <= range->min_uV)
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min_uV = range->min_uV;
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/* range->uV_step == 0 means fixed voltage range */
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if (range->uV_step == 0) {
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ret = 0;
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} else {
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ret = DIV_ROUND_UP(min_uV - range->min_uV,
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range->uV_step);
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if (ret < 0)
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return ret;
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}
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ret += range->min_sel;
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break;
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}
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if (i == rdev->desc->n_linear_ranges)
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return -EINVAL;
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/* Map back into a voltage to verify we're still in bounds */
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voltage = rdev->desc->ops->list_voltage(rdev, ret);
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if (voltage < min_uV || voltage > max_uV)
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return -EINVAL;
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
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/**
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* regulator_list_voltage_linear - List voltages with simple calculation
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*
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* @rdev: Regulator device
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* @selector: Selector to convert into a voltage
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*
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* Regulators with a simple linear mapping between voltages and
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* selectors can set min_uV and uV_step in the regulator descriptor
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* and then use this function as their list_voltage() operation,
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*/
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int regulator_list_voltage_linear(struct regulator_dev *rdev,
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unsigned int selector)
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{
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if (selector >= rdev->desc->n_voltages)
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return -EINVAL;
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if (selector < rdev->desc->linear_min_sel)
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return 0;
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selector -= rdev->desc->linear_min_sel;
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return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
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}
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EXPORT_SYMBOL_GPL(regulator_list_voltage_linear);
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/**
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* regulator_list_voltage_linear_range - List voltages for linear ranges
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*
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* @rdev: Regulator device
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* @selector: Selector to convert into a voltage
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*
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* Regulators with a series of simple linear mappings between voltages
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* and selectors can set linear_ranges in the regulator descriptor and
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* then use this function as their list_voltage() operation,
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*/
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int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
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unsigned int selector)
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{
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const struct regulator_linear_range *range;
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int i;
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if (!rdev->desc->n_linear_ranges) {
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BUG_ON(!rdev->desc->n_linear_ranges);
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return -EINVAL;
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}
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for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
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range = &rdev->desc->linear_ranges[i];
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if (!(selector >= range->min_sel &&
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selector <= range->max_sel))
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continue;
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selector -= range->min_sel;
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return range->min_uV + (range->uV_step * selector);
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}
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
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/**
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* regulator_list_voltage_table - List voltages with table based mapping
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*
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* @rdev: Regulator device
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* @selector: Selector to convert into a voltage
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*
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* Regulators with table based mapping between voltages and
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* selectors can set volt_table in the regulator descriptor
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* and then use this function as their list_voltage() operation.
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*/
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int regulator_list_voltage_table(struct regulator_dev *rdev,
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unsigned int selector)
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{
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if (!rdev->desc->volt_table) {
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BUG_ON(!rdev->desc->volt_table);
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return -EINVAL;
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}
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if (selector >= rdev->desc->n_voltages)
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return -EINVAL;
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return rdev->desc->volt_table[selector];
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}
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EXPORT_SYMBOL_GPL(regulator_list_voltage_table);
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/**
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* regulator_set_bypass_regmap - Default set_bypass() using regmap
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*
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* @rdev: device to operate on.
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* @enable: state to set.
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*/
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int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable)
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{
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unsigned int val;
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if (enable) {
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val = rdev->desc->bypass_val_on;
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if (!val)
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val = rdev->desc->bypass_mask;
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} else {
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val = rdev->desc->bypass_val_off;
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}
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return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
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rdev->desc->bypass_mask, val);
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}
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EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
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/**
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* regulator_get_bypass_regmap - Default get_bypass() using regmap
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*
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* @rdev: device to operate on.
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* @enable: current state.
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*/
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int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
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if (ret != 0)
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return ret;
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*enable = val & rdev->desc->bypass_mask;
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return 0;
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}
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EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
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