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Touchapnel devices are useful in u-boot for implementation of boot menu user interfaces on tablets and other touch based devices. This uclass implements start, stop and get_touches interface methods. Signed-off-by: Ondrej Jirman <megous@megous.com>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
#ifndef __TOUCHPANEL_H
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#define __TOUCHPANEL_H
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/**
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* struct touchpanel_priv - information about a touchpanel, for the uclass
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*
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* @sdev: stdio device
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*/
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struct touchpanel_priv {
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int size_x;
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int size_y;
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};
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struct touchpanel_touch {
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int id;
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int x;
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int y;
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};
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/**
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* struct touchpanel_ops - touchpanel device operations
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*/
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struct touchpanel_ops {
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/**
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* start() - enable the touchpanel to be ready for use
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*
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* @dev: Device to enable
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* @return 0 if OK, -ve on error
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*/
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int (*start)(struct udevice *dev);
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/**
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* stop() - disable the touchpanel when no-longer needed
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*
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* @dev: Device to disable
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* @return 0 if OK, -ve on error
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*/
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int (*stop)(struct udevice *dev);
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/**
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* get_touches() - get list of active touches
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*
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* @dev: Device to read from
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* @touches: Array where to store touches. If NULL, the driver will
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* only return number of touches available.
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* @max_touches: Size of an touches array
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* @return -EAGAIN if no touch is available, otherwise number of touches
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* available.
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*/
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int (*get_touches)(struct udevice *dev,
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struct touchpanel_touch* touches, int max_touches);
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};
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#define touchpanel_get_ops(dev) ((struct touchpanel_ops *)(dev)->driver->ops)
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int touchpanel_start(struct udevice *dev);
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int touchpanel_stop(struct udevice *dev);
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int touchpanel_get_touches(struct udevice *dev,
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struct touchpanel_touch* touches, int max_touches);
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#endif /* __TOUCHPANEL_H */
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