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static struct kobject *mts_lora_kobject;
static void mts_load_lora_port(void)
{
// create lora/ subdir
mts_lora_kobject = kobject_create_and_add("lora", &mts_io_platform_device->dev.kobj);
if (sysfs_create_group(mts_lora_kobject, attr_group_lora)) {
log_error("failed to create lora attributes");
}
}
static void mts_teardown_lora_port(void)
{
// clean up "lora/" kobject if it exists
if (mts_lora_kobject) {
kobject_put(mts_lora_kobject);
}
}
static ssize_t mts_attr_show_lora_product_info(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
ssize_t value;
char label[32];
snprintf(label, sizeof label, "%s/%s", kobj->name, attr->attr.name);
if (strcmp(label, "lora/eui") == 0) {
value = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
id_eeprom.lora_eui[0],
id_eeprom.lora_eui[1],
id_eeprom.lora_eui[2],
id_eeprom.lora_eui[3],
id_eeprom.lora_eui[4],
id_eeprom.lora_eui[5],
id_eeprom.lora_eui[6],
id_eeprom.lora_eui[7]);
}
else if (strcmp(label, "lora/product-id") == 0) {
value = sprintf(buf, "%.32s\n", id_eeprom.lora_product_id);
}
else if (strcmp(label, "lora/hw-version") == 0) {
value = sprintf(buf, "%.32s\n", id_eeprom.lora_hw_version);
}
else {
log_error("attribute '%s' not found", label);
value = -1;
}
return value;
}
static ssize_t mts_attr_show_lora_gpio_pin(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
int value;
struct gpio_pin *pin;
char pin_label[32];
snprintf(pin_label, sizeof pin_label, "%s/%s", kobj->name, attr->attr.name); // ex. lora/reset
pin = gpio_pin_by_attr_name(pin_label);
if (!pin) {
return -ENODEV;
}
mutex_lock(&mts_io_mutex);
value = gpio_get_value(pin->pin.gpio);
mutex_unlock(&mts_io_mutex);
if (value < 0) {
return value;
}
if (pin->active_low) {
value = !value;
}
return sprintf(buf, "%d\n", value);
}
static ssize_t mts_attr_store_lora_gpio_pin(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int value;
struct gpio_pin *pin;
char pin_label[32];
snprintf(pin_label, sizeof pin_label, "%s/%s", kobj->name, attr->attr.name); // ex. lora/reset
pin = gpio_pin_by_attr_name(pin_label);
if (!pin) {
return -ENODEV;
}
if (sscanf(buf, "%i", &value) != 1) {
return -EINVAL;
}
if (pin->active_low) {
value = !value;
}
mutex_lock(&mts_io_mutex);
gpio_set_value(pin->pin.gpio, value);
mutex_unlock(&mts_io_mutex);
return count;
}
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