regulator: max1586: add device-tree support

Add device-tree support to max1586.
The driver can still be used with the legacy platform data, or the new
device-tree way.

This work is heavily inspired by the device-tree support of its cousin
max8660 driver.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Robert Jarzmik 2014-08-31 21:10:51 +02:00 committed by Mark Brown
parent 7d1311b93e
commit 4e00517945
2 changed files with 80 additions and 3 deletions

View File

@ -24,6 +24,8 @@
#include <linux/regulator/driver.h>
#include <linux/slab.h>
#include <linux/regulator/max1586.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#define MAX1586_V3_MAX_VSEL 31
#define MAX1586_V6_MAX_VSEL 3
@ -157,13 +159,87 @@ static struct regulator_desc max1586_reg[] = {
},
};
int of_get_max1586_platform_data(struct device *dev,
struct max1586_platform_data *pdata)
{
struct max1586_subdev_data *sub;
struct of_regulator_match rmatch[ARRAY_SIZE(max1586_reg)];
struct device_node *np = dev->of_node;
int i, matched;
if (of_property_read_u32(np, "v3-gain",
&pdata->v3_gain) < 0) {
dev_err(dev, "%s has no 'v3-gain' property\n", np->full_name);
return -EINVAL;
}
np = of_get_child_by_name(np, "regulators");
if (!np) {
dev_err(dev, "missing 'regulators' subnode in DT\n");
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(rmatch); i++)
rmatch[i].name = max1586_reg[i].name;
matched = of_regulator_match(dev, np, rmatch, ARRAY_SIZE(rmatch));
of_node_put(np);
/*
* If matched is 0, ie. neither Output_V3 nor Output_V6 have been found,
* return 0, which signals the normal situation where no subregulator is
* available. This is normal because the max1586 doesn't provide any
* readback support, so the subregulators can't report any status
* anyway. If matched < 0, return the error.
*/
if (matched <= 0)
return matched;
pdata->subdevs = devm_kzalloc(dev, sizeof(struct max1586_subdev_data) *
matched, GFP_KERNEL);
if (!pdata->subdevs)
return -ENOMEM;
pdata->num_subdevs = matched;
sub = pdata->subdevs;
for (i = 0; i < matched; i++) {
sub->id = i;
sub->name = rmatch[i].of_node->name;
sub->platform_data = rmatch[i].init_data;
sub++;
}
return 0;
}
static const struct of_device_id max1586_of_match[] = {
{ .compatible = "maxim,max1586", },
{},
};
MODULE_DEVICE_TABLE(of, max1586_of_match);
static int max1586_pmic_probe(struct i2c_client *client,
const struct i2c_device_id *i2c_id)
{
struct max1586_platform_data *pdata = dev_get_platdata(&client->dev);
struct max1586_platform_data *pdata, pdata_of;
struct regulator_config config = { };
struct max1586_data *max1586;
int i, id;
int i, id, ret;
const struct of_device_id *match;
pdata = dev_get_platdata(&client->dev);
if (client->dev.of_node && !pdata) {
match = of_match_device(of_match_ptr(max1586_of_match),
&client->dev);
if (!match) {
dev_err(&client->dev, "Error: No device match found\n");
return -ENODEV;
}
ret = of_get_max1586_platform_data(&client->dev, &pdata_of);
if (ret < 0)
return ret;
pdata = &pdata_of;
}
max1586 = devm_kzalloc(&client->dev, sizeof(struct max1586_data),
GFP_KERNEL);
@ -229,6 +305,7 @@ static struct i2c_driver max1586_pmic_driver = {
.driver = {
.name = "max1586",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(max1586_of_match),
},
.id_table = max1586_id,
};

View File

@ -40,7 +40,7 @@
*/
struct max1586_subdev_data {
int id;
char *name;
const char *name;
struct regulator_init_data *platform_data;
};