From ea08eeccae9297f7aabd2ef7f0c2517ac4549acc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:18:26 +0000
Subject: [PATCH] write in 30M
---
kernel/drivers/regulator/helpers.c | 469 +++++++++++++++++++++++++++++++++++++++++++++++++++-------
1 files changed, 410 insertions(+), 59 deletions(-)
diff --git a/kernel/drivers/regulator/helpers.c b/kernel/drivers/regulator/helpers.c
index 2ae7c3a..e4bb09b 100644
--- a/kernel/drivers/regulator/helpers.c
+++ b/kernel/drivers/regulator/helpers.c
@@ -1,15 +1,9 @@
-/*
- * helpers.c -- Voltage/Current Regulator framework helper functions.
- *
- * Copyright 2007, 2008 Wolfson Microelectronics PLC.
- * Copyright 2008 SlimLogic Ltd.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// helpers.c -- Voltage/Current Regulator framework helper functions.
+//
+// Copyright 2007, 2008 Wolfson Microelectronics PLC.
+// Copyright 2008 SlimLogic Ltd.
#include <linux/kernel.h>
#include <linux/err.h>
@@ -18,6 +12,8 @@
#include <linux/regulator/consumer.h>
#include <linux/regulator/driver.h>
#include <linux/module.h>
+
+#include "internal.h"
/**
* regulator_is_enabled_regmap - standard is_enabled() for regmap users
@@ -102,6 +98,130 @@
rdev->desc->enable_mask, val);
}
EXPORT_SYMBOL_GPL(regulator_disable_regmap);
+
+static int regulator_range_selector_to_index(struct regulator_dev *rdev,
+ unsigned int rval)
+{
+ int i;
+
+ if (!rdev->desc->linear_range_selectors)
+ return -EINVAL;
+
+ rval &= rdev->desc->vsel_range_mask;
+
+ for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
+ if (rdev->desc->linear_range_selectors[i] == rval)
+ return i;
+ }
+ return -EINVAL;
+}
+
+/**
+ * regulator_get_voltage_sel_pickable_regmap - pickable range get_voltage_sel
+ *
+ * @rdev: regulator to operate on
+ *
+ * Regulators that use regmap for their register I/O and use pickable
+ * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
+ * fields in their descriptor and then use this as their get_voltage_vsel
+ * operation, saving some code.
+ */
+int regulator_get_voltage_sel_pickable_regmap(struct regulator_dev *rdev)
+{
+ unsigned int r_val;
+ int range;
+ unsigned int val;
+ int ret;
+ unsigned int voltages = 0;
+ const struct linear_range *r = rdev->desc->linear_ranges;
+
+ if (!r)
+ return -EINVAL;
+
+ ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
+ if (ret != 0)
+ return ret;
+
+ ret = regmap_read(rdev->regmap, rdev->desc->vsel_range_reg, &r_val);
+ if (ret != 0)
+ return ret;
+
+ val &= rdev->desc->vsel_mask;
+ val >>= ffs(rdev->desc->vsel_mask) - 1;
+
+ range = regulator_range_selector_to_index(rdev, r_val);
+ if (range < 0)
+ return -EINVAL;
+
+ voltages = linear_range_values_in_range_array(r, range);
+
+ return val + voltages;
+}
+EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_pickable_regmap);
+
+/**
+ * regulator_set_voltage_sel_pickable_regmap - pickable range set_voltage_sel
+ *
+ * @rdev: regulator to operate on
+ * @sel: Selector to set
+ *
+ * Regulators that use regmap for their register I/O and use pickable
+ * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
+ * fields in their descriptor and then use this as their set_voltage_vsel
+ * operation, saving some code.
+ */
+int regulator_set_voltage_sel_pickable_regmap(struct regulator_dev *rdev,
+ unsigned int sel)
+{
+ unsigned int range;
+ int ret, i;
+ unsigned int voltages_in_range = 0;
+
+ for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
+ const struct linear_range *r;
+
+ r = &rdev->desc->linear_ranges[i];
+ voltages_in_range = linear_range_values_in_range(r);
+
+ if (sel < voltages_in_range)
+ break;
+ sel -= voltages_in_range;
+ }
+
+ if (i == rdev->desc->n_linear_ranges)
+ return -EINVAL;
+
+ sel <<= ffs(rdev->desc->vsel_mask) - 1;
+ sel += rdev->desc->linear_ranges[i].min_sel;
+
+ range = rdev->desc->linear_range_selectors[i];
+
+ if (rdev->desc->vsel_reg == rdev->desc->vsel_range_reg) {
+ ret = regmap_update_bits(rdev->regmap,
+ rdev->desc->vsel_reg,
+ rdev->desc->vsel_range_mask |
+ rdev->desc->vsel_mask, sel | range);
+ } else {
+ ret = regmap_update_bits(rdev->regmap,
+ rdev->desc->vsel_range_reg,
+ rdev->desc->vsel_range_mask, range);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
+ rdev->desc->vsel_mask, sel);
+ }
+
+ if (ret)
+ return ret;
+
+ if (rdev->desc->apply_bit)
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
+ rdev->desc->apply_bit,
+ rdev->desc->apply_bit);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_pickable_regmap);
/**
* regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
@@ -287,8 +407,10 @@
int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
- const struct regulator_linear_range *range;
+ const struct linear_range *range;
int ret = -EINVAL;
+ unsigned int sel;
+ bool found;
int voltage, i;
if (!rdev->desc->n_linear_ranges) {
@@ -297,44 +419,94 @@
}
for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
- int linear_max_uV;
-
range = &rdev->desc->linear_ranges[i];
- linear_max_uV = range->min_uV +
- (range->max_sel - range->min_sel) * range->uV_step;
- if (!(min_uV <= linear_max_uV && max_uV >= range->min_uV))
+ ret = linear_range_get_selector_high(range, min_uV, &sel,
+ &found);
+ if (ret)
continue;
+ ret = sel;
- if (min_uV <= range->min_uV)
- min_uV = range->min_uV;
-
- /* range->uV_step == 0 means fixed voltage range */
- if (range->uV_step == 0) {
- ret = 0;
- } else {
- ret = DIV_ROUND_UP(min_uV - range->min_uV,
- range->uV_step);
- if (ret < 0)
- return ret;
- }
-
- ret += range->min_sel;
-
- break;
+ /*
+ * Map back into a voltage to verify we're still in bounds.
+ * If we are not, then continue checking rest of the ranges.
+ */
+ voltage = rdev->desc->ops->list_voltage(rdev, sel);
+ if (voltage >= min_uV && voltage <= max_uV)
+ break;
}
if (i == rdev->desc->n_linear_ranges)
return -EINVAL;
- /* Map back into a voltage to verify we're still in bounds */
- voltage = rdev->desc->ops->list_voltage(rdev, ret);
- if (voltage < min_uV || voltage > max_uV)
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
+
+/**
+ * regulator_map_voltage_pickable_linear_range - map_voltage, pickable ranges
+ *
+ * @rdev: Regulator to operate on
+ * @min_uV: Lower bound for voltage
+ * @max_uV: Upper bound for voltage
+ *
+ * Drivers providing pickable linear_ranges in their descriptor can use
+ * this as their map_voltage() callback.
+ */
+int regulator_map_voltage_pickable_linear_range(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ const struct linear_range *range;
+ int ret = -EINVAL;
+ int voltage, i;
+ unsigned int selector = 0;
+
+ if (!rdev->desc->n_linear_ranges) {
+ BUG_ON(!rdev->desc->n_linear_ranges);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
+ int linear_max_uV;
+ bool found;
+ unsigned int sel;
+
+ range = &rdev->desc->linear_ranges[i];
+ linear_max_uV = linear_range_get_max_value(range);
+
+ if (!(min_uV <= linear_max_uV && max_uV >= range->min)) {
+ selector += linear_range_values_in_range(range);
+ continue;
+ }
+
+ ret = linear_range_get_selector_high(range, min_uV, &sel,
+ &found);
+ if (ret) {
+ selector += linear_range_values_in_range(range);
+ continue;
+ }
+
+ ret = selector + sel - range->min_sel;
+
+ voltage = rdev->desc->ops->list_voltage(rdev, ret);
+
+ /*
+ * Map back into a voltage to verify we're still in bounds.
+ * We may have overlapping voltage ranges. Hence we don't
+ * exit but retry until we have checked all ranges.
+ */
+ if (voltage < min_uV || voltage > max_uV)
+ selector += linear_range_values_in_range(range);
+ else
+ break;
+ }
+
+ if (i == rdev->desc->n_linear_ranges)
return -EINVAL;
return ret;
}
-EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
+EXPORT_SYMBOL_GPL(regulator_map_voltage_pickable_linear_range);
/**
* regulator_list_voltage_linear - List voltages with simple calculation
@@ -361,6 +533,86 @@
EXPORT_SYMBOL_GPL(regulator_list_voltage_linear);
/**
+ * regulator_list_voltage_pickable_linear_range - pickable range list voltages
+ *
+ * @rdev: Regulator device
+ * @selector: Selector to convert into a voltage
+ *
+ * list_voltage() operation, intended to be used by drivers utilizing pickable
+ * ranges helpers.
+ */
+int regulator_list_voltage_pickable_linear_range(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ const struct linear_range *range;
+ int i;
+ unsigned int all_sels = 0;
+
+ if (!rdev->desc->n_linear_ranges) {
+ BUG_ON(!rdev->desc->n_linear_ranges);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
+ unsigned int sel_indexes;
+
+ range = &rdev->desc->linear_ranges[i];
+
+ sel_indexes = linear_range_values_in_range(range) - 1;
+
+ if (all_sels + sel_indexes >= selector) {
+ selector -= all_sels;
+ /*
+ * As we see here, pickable ranges work only as
+ * long as the first selector for each pickable
+ * range is 0, and the each subsequent range for
+ * this 'pick' follow immediately at next unused
+ * selector (Eg. there is no gaps between ranges).
+ * I think this is fine but it probably should be
+ * documented. OTOH, whole pickable range stuff
+ * might benefit from some documentation
+ */
+ return range->min + (range->step * selector);
+ }
+
+ all_sels += (sel_indexes + 1);
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(regulator_list_voltage_pickable_linear_range);
+
+/**
+ * regulator_desc_list_voltage_linear_range - List voltages for linear ranges
+ *
+ * @desc: Regulator desc for regulator which volatges are to be listed
+ * @selector: Selector to convert into a voltage
+ *
+ * Regulators with a series of simple linear mappings between voltages
+ * and selectors who have set linear_ranges in the regulator descriptor
+ * can use this function prior regulator registration to list voltages.
+ * This is useful when voltages need to be listed during device-tree
+ * parsing.
+ */
+int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
+ unsigned int selector)
+{
+ unsigned int val;
+ int ret;
+
+ BUG_ON(!desc->n_linear_ranges);
+
+ ret = linear_range_get_value_array(desc->linear_ranges,
+ desc->n_linear_ranges, selector,
+ &val);
+ if (ret)
+ return ret;
+
+ return val;
+}
+EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear_range);
+
+/**
* regulator_list_voltage_linear_range - List voltages for linear ranges
*
* @rdev: Regulator device
@@ -373,27 +625,7 @@
int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
unsigned int selector)
{
- const struct regulator_linear_range *range;
- int i;
-
- if (!rdev->desc->n_linear_ranges) {
- BUG_ON(!rdev->desc->n_linear_ranges);
- return -EINVAL;
- }
-
- for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
- range = &rdev->desc->linear_ranges[i];
-
- if (!(selector >= range->min_sel &&
- selector <= range->max_sel))
- continue;
-
- selector -= range->min_sel;
-
- return range->min_uV + (range->uV_step * selector);
- }
-
- return -EINVAL;
+ return regulator_desc_list_voltage_linear_range(rdev->desc, selector);
}
EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
@@ -528,3 +760,122 @@
rdev->desc->active_discharge_mask, val);
}
EXPORT_SYMBOL_GPL(regulator_set_active_discharge_regmap);
+
+/**
+ * regulator_set_current_limit_regmap - set_current_limit for regmap users
+ *
+ * @rdev: regulator to operate on
+ * @min_uA: Lower bound for current limit
+ * @max_uA: Upper bound for current limit
+ *
+ * Regulators that use regmap for their register I/O can set curr_table,
+ * csel_reg and csel_mask fields in their descriptor and then use this
+ * as their set_current_limit operation, saving some code.
+ */
+int regulator_set_current_limit_regmap(struct regulator_dev *rdev,
+ int min_uA, int max_uA)
+{
+ unsigned int n_currents = rdev->desc->n_current_limits;
+ int i, sel = -1;
+
+ if (n_currents == 0)
+ return -EINVAL;
+
+ if (rdev->desc->curr_table) {
+ const unsigned int *curr_table = rdev->desc->curr_table;
+ bool ascend = curr_table[n_currents - 1] > curr_table[0];
+
+ /* search for closest to maximum */
+ if (ascend) {
+ for (i = n_currents - 1; i >= 0; i--) {
+ if (min_uA <= curr_table[i] &&
+ curr_table[i] <= max_uA) {
+ sel = i;
+ break;
+ }
+ }
+ } else {
+ for (i = 0; i < n_currents; i++) {
+ if (min_uA <= curr_table[i] &&
+ curr_table[i] <= max_uA) {
+ sel = i;
+ break;
+ }
+ }
+ }
+ }
+
+ if (sel < 0)
+ return -EINVAL;
+
+ sel <<= ffs(rdev->desc->csel_mask) - 1;
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->csel_reg,
+ rdev->desc->csel_mask, sel);
+}
+EXPORT_SYMBOL_GPL(regulator_set_current_limit_regmap);
+
+/**
+ * regulator_get_current_limit_regmap - get_current_limit for regmap users
+ *
+ * @rdev: regulator to operate on
+ *
+ * Regulators that use regmap for their register I/O can set the
+ * csel_reg and csel_mask fields in their descriptor and then use this
+ * as their get_current_limit operation, saving some code.
+ */
+int regulator_get_current_limit_regmap(struct regulator_dev *rdev)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &val);
+ if (ret != 0)
+ return ret;
+
+ val &= rdev->desc->csel_mask;
+ val >>= ffs(rdev->desc->csel_mask) - 1;
+
+ if (rdev->desc->curr_table) {
+ if (val >= rdev->desc->n_current_limits)
+ return -EINVAL;
+
+ return rdev->desc->curr_table[val];
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(regulator_get_current_limit_regmap);
+
+/**
+ * regulator_bulk_set_supply_names - initialize the 'supply' fields in an array
+ * of regulator_bulk_data structs
+ *
+ * @consumers: array of regulator_bulk_data entries to initialize
+ * @supply_names: array of supply name strings
+ * @num_supplies: number of supply names to initialize
+ *
+ * Note: the 'consumers' array must be the size of 'num_supplies'.
+ */
+void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
+ const char *const *supply_names,
+ unsigned int num_supplies)
+{
+ unsigned int i;
+
+ for (i = 0; i < num_supplies; i++)
+ consumers[i].supply = supply_names[i];
+}
+EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);
+
+/**
+ * regulator_is_equal - test whether two regulators are the same
+ *
+ * @reg1: first regulator to operate on
+ * @reg2: second regulator to operate on
+ */
+bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
+{
+ return reg1->rdev == reg2->rdev;
+}
+EXPORT_SYMBOL_GPL(regulator_is_equal);
--
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