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regulator: mc13892: add device tree probe support 

It adds device tree probe support for mc13892-regulator driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Shawn Guo 2011-12-21 23:00:46 +08:00 committed by Mark Brown
parent 3a5d03158d
commit 93bcb23b38
4 changed files with 110 additions and 11 deletions
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43
drivers/regulator/mc13892-regulator.c
View File

@ -527,18 +527,27 @@ static int __devinit mc13892_regulator_probe(struct platform_device *pdev)
struct mc13xxx *mc13892 = dev_get_drvdata(pdev->dev.parent);
struct mc13xxx_regulator_platform_data *pdata =
dev_get_platdata(&pdev->dev);
struct mc13xxx_regulator_init_data *init_data;
struct mc13xxx_regulator_init_data *mc13xxx_data;
int i, ret;
int num_regulators = 0;
u32 val;
num_regulators = mc13xxx_get_num_regulators_dt(pdev);
if (num_regulators <= 0 && pdata)
num_regulators = pdata->num_regulators;
if (num_regulators <= 0)
return -EINVAL;
priv = kzalloc(sizeof(*priv) +
pdata->num_regulators * sizeof(priv->regulators[0]),
num_regulators * sizeof(priv->regulators[0]),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->num_regulators = num_regulators;
priv->mc13xxx_regulators = mc13892_regulators;
priv->mc13xxx = mc13892;
platform_set_drvdata(pdev, priv);
mc13xxx_lock(mc13892);
ret = mc13xxx_reg_read(mc13892, MC13892_REVISION, &val);
@ -569,11 +578,27 @@ static int __devinit mc13892_regulator_probe(struct platform_device *pdev)
= mc13892_vcam_set_mode;
mc13892_regulators[MC13892_VCAM].desc.ops->get_mode
= mc13892_vcam_get_mode;
for (i = 0; i < pdata->num_regulators; i++) {
init_data = &pdata->regulators[i];
mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13892_regulators,
ARRAY_SIZE(mc13892_regulators));
for (i = 0; i < num_regulators; i++) {
struct regulator_init_data *init_data;
struct regulator_desc *desc;
struct device_node *node = NULL;
int id;
if (mc13xxx_data) {
id = mc13xxx_data[i].id;
init_data = mc13xxx_data[i].init_data;
node = mc13xxx_data[i].node;
} else {
id = pdata->regulators[i].id;
init_data = pdata->regulators[i].init_data;
}
desc = &mc13892_regulators[id].desc;
priv->regulators[i] = regulator_register(
&mc13892_regulators[init_data->id].desc,
&pdev->dev, init_data->init_data, priv, NULL);
desc, &pdev->dev, init_data, priv, node);
if (IS_ERR(priv->regulators[i])) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
@ -583,8 +608,6 @@ static int __devinit mc13892_regulator_probe(struct platform_device *pdev)
}
}
platform_set_drvdata(pdev, priv);
return 0;
err:
while (--i >= 0)
@ -600,13 +623,11 @@ err_free:
static int __devexit mc13892_regulator_remove(struct platform_device *pdev)
{
struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
struct mc13xxx_regulator_platform_data *pdata =
dev_get_platdata(&pdev->dev);
int i;
platform_set_drvdata(pdev, NULL);
for (i = 0; i < pdata->num_regulators; i++)
for (i = 0; i < priv->num_regulators; i++)
regulator_unregister(priv->regulators[i]);
kfree(priv);

57
drivers/regulator/mc13xxx-regulator-core.c
View File

@ -18,12 +18,14 @@
#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)
@ -236,6 +238,61 @@ int mc13xxx_sw_regulator_is_enabled(struct regulator_dev *rdev)
}
EXPORT_SYMBOL_GPL(mc13xxx_sw_regulator_is_enabled);
#ifdef CONFIG_OF
int __devinit mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
{
struct device_node *parent, *child;
int num = 0;
of_node_get(pdev->dev.parent->of_node);
parent = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
if (!parent)
return -ENODEV;
for_each_child_of_node(parent, child)
num++;
return num;
}
struct mc13xxx_regulator_init_data * __devinit 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;
of_node_get(pdev->dev.parent->of_node);
parent = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
if (!parent)
return NULL;
data = devm_kzalloc(&pdev->dev, sizeof(*data) * priv->num_regulators,
GFP_KERNEL);
if (!data)
return NULL;
p = data;
for_each_child_of_node(parent, child) {
for (i = 0; i < num_regulators; i++) {
if (!of_node_cmp(child->name,
regulators[i].desc.name)) {
p->id = i;
p->init_data = of_get_regulator_init_data(
&pdev->dev, child);
p->node = child;
p++;
break;
}
}
}
return data;
}
#endif
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
MODULE_DESCRIPTION("Regulator Driver for Freescale MC13xxx PMIC");

20
drivers/regulator/mc13xxx.h
View File

@ -29,6 +29,7 @@ struct mc13xxx_regulator_priv {
struct mc13xxx *mc13xxx;
u32 powermisc_pwgt_state;
struct mc13xxx_regulator *mc13xxx_regulators;
int num_regulators;
struct regulator_dev *regulators[];
};
@ -42,6 +43,25 @@ extern int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV, unsigned *selector);
extern int mc13xxx_fixed_regulator_get_voltage(struct regulator_dev *rdev);
#ifdef CONFIG_OF
extern int mc13xxx_get_num_regulators_dt(struct platform_device *pdev);
extern struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
int num_regulators);
#else
static inline int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
{
return -ENODEV;
}
static inline struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
int num_regulators)
{
return NULL;
}
#endif
extern struct regulator_ops mc13xxx_regulator_ops;
extern struct regulator_ops mc13xxx_fixed_regulator_ops;

1
include/linux/mfd/mc13xxx.h
View File

@ -69,6 +69,7 @@ struct regulator_init_data;
struct mc13xxx_regulator_init_data {
int id;
struct regulator_init_data *init_data;
struct device_node *node;
};
struct mc13xxx_regulator_platform_data {