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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>
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2018 Ondrej Jirman <megous@megous.com>
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*/
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#include <errno.h>
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#include <dm.h>
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#include <dm/uclass-internal.h>
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#include <touchpanel.h>
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int touchpanel_start(struct udevice *dev)
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{
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const struct touchpanel_ops *ops = touchpanel_get_ops(dev);
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if (!ops || !ops->start)
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return -ENOSYS;
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return ops->start(dev);
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}
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int touchpanel_stop(struct udevice *dev)
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{
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const struct touchpanel_ops *ops = touchpanel_get_ops(dev);
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if (!ops || !ops->stop)
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return -ENOSYS;
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return ops->stop(dev);
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}
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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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{
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const struct touchpanel_ops *ops = touchpanel_get_ops(dev);
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if (!ops || !ops->get_touches)
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return -ENOSYS;
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return ops->get_touches(dev, touches, max_touches);
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}
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static int touchpanel_pre_probe(struct udevice *dev)
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{
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struct touchpanel_priv *uc_priv;
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uc_priv = dev_get_uclass_priv(dev);
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if (!uc_priv)
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return -ENXIO;
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uc_priv->size_x = dev_read_u32_default(dev, "touchscreen-size-x",
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-ENODATA);
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uc_priv->size_y = dev_read_u32_default(dev, "touchscreen-size-y",
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-ENODATA);
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if (uc_priv->size_x == -ENODATA || uc_priv->size_y == -ENODATA)
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uc_priv->size_x = uc_priv->size_y = -ENODATA;
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return 0;
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}
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UCLASS_DRIVER(touchpanel) = {
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.id = UCLASS_TOUCHPANEL,
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.name = "touchpanel",
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.pre_probe = touchpanel_pre_probe,
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.per_device_auto = sizeof(struct touchpanel_priv),
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};
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