diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/IR/ir-keytable.c | 13 | ||||
| -rw-r--r-- | drivers/media/IR/ir-sysfs.c | 50 |
2 files changed, 56 insertions, 7 deletions
diff --git a/drivers/media/IR/ir-keytable.c b/drivers/media/IR/ir-keytable.c index b2d498c3183..68aceb8d63a 100644 --- a/drivers/media/IR/ir-keytable.c +++ b/drivers/media/IR/ir-keytable.c @@ -402,9 +402,10 @@ EXPORT_SYMBOL_GPL(ir_g_keycode_from_table); * @input_dev: the struct input_dev descriptor of the device * @rc_tab: the struct ir_scancode_table table of scancode/keymap * - * This routine is used to initialize the input infrastructure to work with - * an IR. - * It should be called before registering the IR device. + * This routine is used to initialize the input infrastructure + * to work with an IR. + * It will register the input/evdev interface for the device and + * register the syfs code for IR class */ int ir_input_register(struct input_dev *input_dev, const struct ir_scancode_table *rc_tab, @@ -471,6 +472,12 @@ err: } EXPORT_SYMBOL_GPL(ir_input_register); +/** + * ir_input_unregister() - unregisters IR and frees resources + * @input_dev: the struct input_dev descriptor of the device + + * This routine is used to free memory and de-register interfaces. + */ void ir_input_unregister(struct input_dev *dev) { struct ir_input_dev *ir_dev = input_get_drvdata(dev); diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c index aede78ddbac..a96738135bb 100644 --- a/drivers/media/IR/ir-sysfs.c +++ b/drivers/media/IR/ir-sysfs.c @@ -18,11 +18,22 @@ #define IRRCV_NUM_DEVICES 256 -unsigned long ir_core_dev_number; +/* bit array to represent IR sysfs device number */ +static unsigned long ir_core_dev_number; +/* class for /sys/class/irrcv */ static struct class *ir_input_class; - +/** + * show_protocol() - shows the current IR protocol + * @d: the device descriptor + * @mattr: the device attribute struct (unused) + * @buf: a pointer to the output buffer + * + * This routine is a callback routine for input read the IR protocol type. + * it is trigged by reading /sys/class/irrcv/irrcv?/current_protocol. + * It returns the protocol name, as understood by the driver. + */ static ssize_t show_protocol(struct device *d, struct device_attribute *mattr, char *buf) { @@ -47,7 +58,19 @@ static ssize_t show_protocol(struct device *d, return sprintf(buf, "%s\n", s); } - +/** + * store_protocol() - shows the current IR protocol + * @d: the device descriptor + * @mattr: the device attribute struct (unused) + * @buf: a pointer to the input buffer + * @len: length of the input buffer + * + * This routine is a callback routine for changing the IR protocol type. + * it is trigged by reading /sys/class/irrcv/irrcv?/current_protocol. + * It changes the IR the protocol name, if the IR type is recognized + * by the driver. + * If an unknown protocol name is used, returns -EINVAL. + */ static ssize_t store_protocol(struct device *d, struct device_attribute *mattr, const char *data, @@ -88,7 +111,9 @@ static ssize_t store_protocol(struct device *d, return len; } - +/* + * Static device attribute struct with the sysfs attributes for IR's + */ static DEVICE_ATTR(current_protocol, S_IRUGO | S_IWUSR, show_protocol, store_protocol); @@ -96,6 +121,12 @@ static struct attribute *ir_dev_attrs[] = { &dev_attr_current_protocol.attr, }; +/** + * ir_register_class() - creates the sysfs for /sys/class/irrcv/irrcv? + * @input_dev: the struct input_dev descriptor of the device + * + * This routine is used to register the syfs code for IR class + */ int ir_register_class(struct input_dev *input_dev) { int rc; @@ -127,6 +158,13 @@ int ir_register_class(struct input_dev *input_dev) return 0; }; +/** + * ir_unregister_class() - removes the sysfs for sysfs for + * /sys/class/irrcv/irrcv? + * @input_dev: the struct input_dev descriptor of the device + * + * This routine is used to unregister the syfs code for IR class + */ void ir_unregister_class(struct input_dev *input_dev) { struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); @@ -142,6 +180,10 @@ void ir_unregister_class(struct input_dev *input_dev) kfree(ir_dev->attr.name); } +/* + * Init/exit code for the module. Basically, creates/removes /sys/class/irrcv + */ + static int __init ir_core_init(void) { ir_input_class = class_create(THIS_MODULE, "irrcv"); |