mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
![Uwe Kleine-König](/assets/img/avatar_default.png)
These drivers don't use the driver_data member of struct i2c_device_id, so don't explicitly initialize this member. This prepares putting driver_data in an anonymous union which requires either no initialization or named designators. But it's also a nice cleanup on its own. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20240430085654.1028864-2-u.kleine-koenig@pengutronix.de Signed-off-by: Guenter Roeck <linux@roeck-us.net>
264 lines
6 KiB
C
264 lines
6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* An hwmon driver for the NXP MC34VR500 PMIC
|
|
*
|
|
* Author: Mario Kicherer <dev@kicherer.org>
|
|
*/
|
|
|
|
#include <linux/bits.h>
|
|
#include <linux/dev_printk.h>
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irqreturn.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#define MC34VR500_I2C_ADDR 0x08
|
|
#define MC34VR500_DEVICEID_VALUE 0x14
|
|
|
|
/* INTSENSE0 */
|
|
#define ENS_BIT BIT(0)
|
|
#define LOWVINS_BIT BIT(1)
|
|
#define THERM110S_BIT BIT(2)
|
|
#define THERM120S_BIT BIT(3)
|
|
#define THERM125S_BIT BIT(4)
|
|
#define THERM130S_BIT BIT(5)
|
|
|
|
#define MC34VR500_DEVICEID 0x00
|
|
|
|
#define MC34VR500_SILICONREVID 0x03
|
|
#define MC34VR500_FABID 0x04
|
|
#define MC34VR500_INTSTAT0 0x05
|
|
#define MC34VR500_INTMASK0 0x06
|
|
#define MC34VR500_INTSENSE0 0x07
|
|
|
|
struct mc34vr500_data {
|
|
struct device *hwmon_dev;
|
|
struct regmap *regmap;
|
|
};
|
|
|
|
static irqreturn_t mc34vr500_process_interrupt(int irq, void *userdata)
|
|
{
|
|
struct mc34vr500_data *data = (struct mc34vr500_data *)userdata;
|
|
unsigned int reg;
|
|
int ret;
|
|
|
|
ret = regmap_read(data->regmap, MC34VR500_INTSTAT0, ®);
|
|
if (ret < 0)
|
|
return IRQ_HANDLED;
|
|
|
|
if (reg) {
|
|
if (reg & LOWVINS_BIT)
|
|
hwmon_notify_event(data->hwmon_dev, hwmon_in,
|
|
hwmon_in_min_alarm, 0);
|
|
|
|
if (reg & THERM110S_BIT)
|
|
hwmon_notify_event(data->hwmon_dev, hwmon_temp,
|
|
hwmon_temp_max_alarm, 0);
|
|
|
|
if (reg & THERM120S_BIT)
|
|
hwmon_notify_event(data->hwmon_dev, hwmon_temp,
|
|
hwmon_temp_crit_alarm, 0);
|
|
|
|
if (reg & THERM130S_BIT)
|
|
hwmon_notify_event(data->hwmon_dev, hwmon_temp,
|
|
hwmon_temp_emergency_alarm, 0);
|
|
|
|
/* write 1 to clear */
|
|
regmap_write(data->regmap, MC34VR500_INTSTAT0, LOWVINS_BIT |
|
|
THERM110S_BIT | THERM120S_BIT | THERM130S_BIT);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static umode_t mc34vr500_is_visible(const void *data,
|
|
enum hwmon_sensor_types type,
|
|
u32 attr, int channel)
|
|
{
|
|
switch (attr) {
|
|
case hwmon_in_min_alarm:
|
|
case hwmon_temp_max_alarm:
|
|
case hwmon_temp_crit_alarm:
|
|
case hwmon_temp_emergency_alarm:
|
|
return 0444;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mc34vr500_alarm_read(struct mc34vr500_data *data, int index,
|
|
long *val)
|
|
{
|
|
unsigned int reg;
|
|
int ret;
|
|
|
|
ret = regmap_read(data->regmap, MC34VR500_INTSENSE0, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val = !!(reg & index);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mc34vr500_read(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, long *val)
|
|
{
|
|
struct mc34vr500_data *data = dev_get_drvdata(dev);
|
|
|
|
switch (type) {
|
|
case hwmon_in:
|
|
switch (attr) {
|
|
case hwmon_in_min_alarm:
|
|
return mc34vr500_alarm_read(data, LOWVINS_BIT, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
case hwmon_temp:
|
|
switch (attr) {
|
|
case hwmon_temp_max_alarm:
|
|
return mc34vr500_alarm_read(data, THERM110S_BIT, val);
|
|
case hwmon_temp_crit_alarm:
|
|
return mc34vr500_alarm_read(data, THERM120S_BIT, val);
|
|
case hwmon_temp_emergency_alarm:
|
|
return mc34vr500_alarm_read(data, THERM130S_BIT, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static const struct hwmon_channel_info * const mc34vr500_info[] = {
|
|
HWMON_CHANNEL_INFO(in, HWMON_I_MIN_ALARM),
|
|
HWMON_CHANNEL_INFO(temp, HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM
|
|
| HWMON_T_EMERGENCY_ALARM),
|
|
NULL,
|
|
};
|
|
|
|
static const struct hwmon_ops mc34vr500_hwmon_ops = {
|
|
.is_visible = mc34vr500_is_visible,
|
|
.read = mc34vr500_read,
|
|
};
|
|
|
|
static const struct hwmon_chip_info mc34vr500_chip_info = {
|
|
.ops = &mc34vr500_hwmon_ops,
|
|
.info = mc34vr500_info,
|
|
};
|
|
|
|
static const struct regmap_config mc34vr500_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = MC34VR500_INTSENSE0,
|
|
};
|
|
|
|
static int mc34vr500_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct mc34vr500_data *data;
|
|
struct device *hwmon_dev;
|
|
int ret;
|
|
unsigned int reg, revid, fabid;
|
|
struct regmap *regmap;
|
|
|
|
regmap = devm_regmap_init_i2c(client, &mc34vr500_regmap_config);
|
|
if (IS_ERR(regmap))
|
|
return PTR_ERR(regmap);
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct mc34vr500_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->regmap = regmap;
|
|
|
|
ret = regmap_read(regmap, MC34VR500_DEVICEID, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (reg != MC34VR500_DEVICEID_VALUE)
|
|
return -ENODEV;
|
|
|
|
ret = regmap_read(regmap, MC34VR500_SILICONREVID, &revid);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regmap_read(regmap, MC34VR500_FABID, &fabid);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_dbg(dev, "mc34vr500: revid 0x%x fabid 0x%x\n", revid, fabid);
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
|
|
data,
|
|
&mc34vr500_chip_info,
|
|
NULL);
|
|
if (IS_ERR(hwmon_dev))
|
|
return PTR_ERR(hwmon_dev);
|
|
|
|
data->hwmon_dev = hwmon_dev;
|
|
|
|
if (client->irq) {
|
|
ret = devm_request_threaded_irq(dev, client->irq, NULL,
|
|
mc34vr500_process_interrupt,
|
|
IRQF_TRIGGER_RISING |
|
|
IRQF_ONESHOT |
|
|
IRQF_SHARED,
|
|
dev_name(dev), data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* write 1 to clear interrupts */
|
|
ret = regmap_write(regmap, MC34VR500_INTSTAT0, LOWVINS_BIT |
|
|
THERM110S_BIT | THERM120S_BIT |
|
|
THERM130S_BIT);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* unmask interrupts */
|
|
ret = regmap_write(regmap, MC34VR500_INTMASK0,
|
|
(unsigned int) ~(LOWVINS_BIT | THERM110S_BIT |
|
|
THERM120S_BIT | THERM130S_BIT));
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id mc34vr500_id[] = {
|
|
{ "mc34vr500" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, mc34vr500_id);
|
|
|
|
static const struct of_device_id __maybe_unused mc34vr500_of_match[] = {
|
|
{ .compatible = "nxp,mc34vr500" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mc34vr500_of_match);
|
|
|
|
static struct i2c_driver mc34vr500_driver = {
|
|
.driver = {
|
|
.name = "mc34vr500",
|
|
.of_match_table = of_match_ptr(mc34vr500_of_match),
|
|
},
|
|
.probe = mc34vr500_probe,
|
|
.id_table = mc34vr500_id,
|
|
};
|
|
|
|
module_i2c_driver(mc34vr500_driver);
|
|
|
|
MODULE_AUTHOR("Mario Kicherer <dev@kicherer.org>");
|
|
|
|
MODULE_DESCRIPTION("MC34VR500 driver");
|
|
MODULE_LICENSE("GPL");
|