loic/ina260-sysfs-driver
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This commit is contained in:
Loic Guegan 2023-08-12 16:35:10 +02:00
parent 87edbc6e4f
commit b2a6cd3c65
3 changed files with 51 additions and 12 deletions
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1
.gitignore vendored
View file

@ -5,5 +5,4 @@
!Makefile
!.gitignore
!ina260.c
!inahwmon.c
!README.md

10
Makefile
View file

@ -20,10 +20,20 @@ run: ina260.c
insmod ina260.ko
echo ina260 0x41 > /sys/bus/i2c/devices/i2c-2/new_device
run2: inahwmon.c
-echo 0x41 > /sys/bus/i2c/devices/i2c-2/delete_device
-rmmod inahwmon
make clean
make
insmod inahwmon.ko
echo ina260 0x41 > /sys/bus/i2c/devices/i2c-2/new_device
read: read.c
gcc $^ -o read
clean:
rm -f ina260*.o ina260.ko ina260.mod* Module.symvers modules.order .ina260* .Module* .modules*
rm -f inahwmon*.o inahwmon.ko inahwmon.mod* Module.symvers modules.order .inahwmon* .Module* .modules*
.PHONY: clean run

52
inahwmon.c
View file

@ -4,21 +4,41 @@
#include "linux/i2c.h"
static const struct hwmon_channel_info power = {
.type = hwmon_power,
.config = HWMON_P_INPUT
};
static int ina260_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
return 0;
}
static int ina260_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
return 0;
}
static const struct hwmon_channel_info * const ina260_info[] = {
&power,
static umode_t ina260_is_visible(const void *drvdata,
enum hwmon_sensor_types type,
u32 attr, int channel){
return 0444;
}
#define HWMON_CHANNEL_INFO(stype, ...) \
(&(struct hwmon_channel_info) { \
.type = hwmon_##stype, \
.config = (u32 []) { \
__VA_ARGS__, 0 \
} \
})
static const struct hwmon_channel_info * ina260_info[] = {
HWMON_CHANNEL_INFO(power,HWMON_P_INPUT),
NULL
};
static const struct hwmon_ops ina260_hwmon_ops = {
//.is_visible = ina238_is_visible,
.read = NULL,
.write = NULL,
.is_visible = ina260_is_visible,
.read = ina260_read,
.write = ina260_write,
};
static const struct hwmon_chip_info ina260_chip_info = {
@ -26,10 +46,19 @@ static const struct hwmon_chip_info ina260_chip_info = {
.info = ina260_info,
};
static int ina260_probe_new(struct i2c_client *client){
hwmon_device_register_with_info(&client->dev,client->name,NULL,
/*const struct attribute_group *extra_groups[] = {
NULL
};*/
static int ina260_probe_new(struct i2c_client *client){
struct device *hwmon_dev;
hwmon_dev=hwmon_device_register_with_info(&client->dev,client->name,NULL,
&ina260_chip_info,NULL);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
return 0;
}
static int ina260_remove(struct i2c_client *client){
@ -46,6 +75,7 @@ static const struct i2c_device_id ina260_ids[] = {
MODULE_DEVICE_TABLE(i2c,ina260_ids);
static struct i2c_driver ina260_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "ina260HWMON"
},