mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 02:23:16 +00:00
e5680c4de3
These regulator_ops variables should never change, make them const. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
221 lines
6.1 KiB
C
221 lines
6.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Regulator Driver for Freescale MC13xxx PMIC
|
|
//
|
|
// Copyright 2010 Yong Shen <yong.shen@linaro.org>
|
|
//
|
|
// Based on mc13783 regulator driver :
|
|
// Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
|
|
// Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
|
|
//
|
|
// Regs infos taken from mc13xxx drivers from freescale and mc13xxx.pdf file
|
|
// from freescale
|
|
|
|
#include <linux/mfd/mc13xxx.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include "mc13xxx.h"
|
|
|
|
static int mc13xxx_regulator_enable(struct regulator_dev *rdev)
|
|
{
|
|
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
|
|
struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
|
|
int id = rdev_get_id(rdev);
|
|
|
|
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
|
|
|
|
return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
|
|
mc13xxx_regulators[id].enable_bit,
|
|
mc13xxx_regulators[id].enable_bit);
|
|
}
|
|
|
|
static int mc13xxx_regulator_disable(struct regulator_dev *rdev)
|
|
{
|
|
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
|
|
struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
|
|
int id = rdev_get_id(rdev);
|
|
|
|
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
|
|
|
|
return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
|
|
mc13xxx_regulators[id].enable_bit, 0);
|
|
}
|
|
|
|
static int mc13xxx_regulator_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
|
|
struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
|
|
int ret, id = rdev_get_id(rdev);
|
|
unsigned int val;
|
|
|
|
ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return (val & mc13xxx_regulators[id].enable_bit) != 0;
|
|
}
|
|
|
|
static int mc13xxx_regulator_set_voltage_sel(struct regulator_dev *rdev,
|
|
unsigned selector)
|
|
{
|
|
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
|
|
struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
|
|
int id = rdev_get_id(rdev);
|
|
|
|
return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].vsel_reg,
|
|
mc13xxx_regulators[id].vsel_mask,
|
|
selector << mc13xxx_regulators[id].vsel_shift);
|
|
}
|
|
|
|
static int mc13xxx_regulator_get_voltage(struct regulator_dev *rdev)
|
|
{
|
|
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
|
|
struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
|
|
int ret, id = rdev_get_id(rdev);
|
|
unsigned int val;
|
|
|
|
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
|
|
|
|
ret = mc13xxx_reg_read(priv->mc13xxx,
|
|
mc13xxx_regulators[id].vsel_reg, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
val = (val & mc13xxx_regulators[id].vsel_mask)
|
|
>> mc13xxx_regulators[id].vsel_shift;
|
|
|
|
dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
|
|
|
|
BUG_ON(val >= mc13xxx_regulators[id].desc.n_voltages);
|
|
|
|
return rdev->desc->volt_table[val];
|
|
}
|
|
|
|
const struct regulator_ops mc13xxx_regulator_ops = {
|
|
.enable = mc13xxx_regulator_enable,
|
|
.disable = mc13xxx_regulator_disable,
|
|
.is_enabled = mc13xxx_regulator_is_enabled,
|
|
.list_voltage = regulator_list_voltage_table,
|
|
.set_voltage_sel = mc13xxx_regulator_set_voltage_sel,
|
|
.get_voltage = mc13xxx_regulator_get_voltage,
|
|
};
|
|
EXPORT_SYMBOL_GPL(mc13xxx_regulator_ops);
|
|
|
|
int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV,
|
|
int max_uV, unsigned *selector)
|
|
{
|
|
int id = rdev_get_id(rdev);
|
|
|
|
dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
|
|
__func__, id, min_uV, max_uV);
|
|
|
|
if (min_uV <= rdev->desc->volt_table[0] &&
|
|
rdev->desc->volt_table[0] <= max_uV) {
|
|
*selector = 0;
|
|
return 0;
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_set_voltage);
|
|
|
|
const struct regulator_ops mc13xxx_fixed_regulator_ops = {
|
|
.enable = mc13xxx_regulator_enable,
|
|
.disable = mc13xxx_regulator_disable,
|
|
.is_enabled = mc13xxx_regulator_is_enabled,
|
|
.list_voltage = regulator_list_voltage_table,
|
|
.set_voltage = mc13xxx_fixed_regulator_set_voltage,
|
|
};
|
|
EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_ops);
|
|
|
|
#ifdef CONFIG_OF
|
|
int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
|
|
{
|
|
struct device_node *parent;
|
|
int num;
|
|
|
|
if (!pdev->dev.parent->of_node)
|
|
return -ENODEV;
|
|
|
|
parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
|
|
if (!parent)
|
|
return -ENODEV;
|
|
|
|
num = of_get_child_count(parent);
|
|
of_node_put(parent);
|
|
return num;
|
|
}
|
|
EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt);
|
|
|
|
struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
|
|
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
|
|
int num_regulators)
|
|
{
|
|
struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
|
|
struct mc13xxx_regulator_init_data *data, *p;
|
|
struct device_node *parent, *child;
|
|
int i, parsed = 0;
|
|
|
|
if (!pdev->dev.parent->of_node)
|
|
return NULL;
|
|
|
|
parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
|
|
if (!parent)
|
|
return NULL;
|
|
|
|
data = devm_kcalloc(&pdev->dev, priv->num_regulators, sizeof(*data),
|
|
GFP_KERNEL);
|
|
if (!data) {
|
|
of_node_put(parent);
|
|
return NULL;
|
|
}
|
|
|
|
p = data;
|
|
|
|
for_each_child_of_node(parent, child) {
|
|
int found = 0;
|
|
|
|
for (i = 0; i < num_regulators; i++) {
|
|
if (!regulators[i].desc.name)
|
|
continue;
|
|
if (of_node_name_eq(child,
|
|
regulators[i].desc.name)) {
|
|
p->id = i;
|
|
p->init_data = of_get_regulator_init_data(
|
|
&pdev->dev, child,
|
|
®ulators[i].desc);
|
|
p->node = child;
|
|
p++;
|
|
|
|
parsed++;
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
dev_warn(&pdev->dev,
|
|
"Unknown regulator: %pOFn\n", child);
|
|
}
|
|
of_node_put(parent);
|
|
|
|
priv->num_regulators = parsed;
|
|
|
|
return data;
|
|
}
|
|
EXPORT_SYMBOL_GPL(mc13xxx_parse_regulators_dt);
|
|
#endif
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
|
|
MODULE_DESCRIPTION("Regulator Driver for Freescale MC13xxx PMIC");
|
|
MODULE_ALIAS("mc13xxx-regulator-core");
|