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hwmon: (ltc2978) Add regulator support 

Add simple on/off regulator support for ltc2978 and
other pmbus parts supported by the ltc2978 driver.

Signed-off-by: Alan Tull <atull@opensource.altera.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Alan Tull 2014-10-15 13:55:10 -05:00 committed by Guenter Roeck
parent ddbb4db4ce
commit 77aa358580
2 changed files with 47 additions and 3 deletions
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11
drivers/hwmon/pmbus/Kconfig
View File

@ -47,15 +47,22 @@ config SENSORS_LM25066
be called lm25066.
config SENSORS_LTC2978
tristate "Linear Technologies LTC2974, LTC2978, LTC3880, and LTC3883"
tristate "Linear Technologies LTC2978 and compatibles"
default n
help
If you say yes here you get hardware monitoring support for Linear
Technology LTC2974, LTC2978, LTC3880, and LTC3883.
Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, and LTM4676.
This driver can also be built as a module. If so, the module will
be called ltc2978.
config SENSORS_LTC2978_REGULATOR
boolean "Regulator support for LTC2978 and compatibles"
depends on SENSORS_LTC2978 && REGULATOR
help
If you say yes here you get regulator support for Linear
Technology LTC2974, LTC2977, LTC2978, LTC3880, LTC3883, and LTM4676.
config SENSORS_MAX16064
tristate "Maxim MAX16064"
default n

39
drivers/hwmon/pmbus/ltc2978.c
View File

@ -22,6 +22,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/regulator/driver.h>
#include "pmbus.h"
enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 };
@ -374,6 +375,19 @@ static const struct i2c_device_id ltc2978_id[] = {
};
MODULE_DEVICE_TABLE(i2c, ltc2978_id);
#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR)
static const struct regulator_desc ltc2978_reg_desc[] = {
PMBUS_REGULATOR("vout", 0),
PMBUS_REGULATOR("vout", 1),
PMBUS_REGULATOR("vout", 2),
PMBUS_REGULATOR("vout", 3),
PMBUS_REGULATOR("vout", 4),
PMBUS_REGULATOR("vout", 5),
PMBUS_REGULATOR("vout", 6),
PMBUS_REGULATOR("vout", 7),
};
#endif /* CONFIG_SENSORS_LTC2978_REGULATOR */
static int ltc2978_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -487,13 +501,36 @@ static int ltc2978_probe(struct i2c_client *client,
default:
return -ENODEV;
}
#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR)
info->num_regulators = info->pages;
info->reg_desc = ltc2978_reg_desc;
if (info->num_regulators > ARRAY_SIZE(ltc2978_reg_desc)) {
dev_err(&client->dev, "num_regulators too large!");
info->num_regulators = ARRAY_SIZE(ltc2978_reg_desc);
}
#endif
return pmbus_do_probe(client, id, info);
}
/* This is the driver that will be inserted */
#ifdef CONFIG_OF
static const struct of_device_id ltc2978_of_match[] = {
{ .compatible = "lltc,ltc2974" },
{ .compatible = "lltc,ltc2977" },
{ .compatible = "lltc,ltc2978" },
{ .compatible = "lltc,ltc3880" },
{ .compatible = "lltc,ltc3883" },
{ .compatible = "lltc,ltm4676" },
{ }
};
MODULE_DEVICE_TABLE(of, ltc2978_of_match);
#endif
static struct i2c_driver ltc2978_driver = {
.driver = {
.name = "ltc2978",
.of_match_table = of_match_ptr(ltc2978_of_match),
},
.probe = ltc2978_probe,
.remove = pmbus_do_remove,