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2098a330b2
[ Upstream commita2f416bf06] Certain touchscreen devices, such as the ELAN9034, are oriented incorrectly and report touches on opposite points on the X and Y axes. For example, a 100x200 screen touched at (10,20) would report (90, 180) and vice versa. This is fixed by adding device quirks to transform the touch points into the correct spaces, from X -> MAX(X) - X, and Y -> MAX(Y) - Y. Signed-off-by: Allen Ballway <ballway@chromium.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Stable-dep-of:03a8610555("HID: retain initial quirks set up when creating HID devices") Signed-off-by: Sasha Levin <sashal@kernel.org>
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef I2C_HID_H
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#define I2C_HID_H
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#include <linux/i2c.h>
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#ifdef CONFIG_DMI
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struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name);
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char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name,
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unsigned int *size);
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u32 i2c_hid_get_dmi_quirks(const u16 vendor, const u16 product);
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#else
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static inline struct i2c_hid_desc
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*i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name)
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{ return NULL; }
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static inline char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name,
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unsigned int *size)
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{ return NULL; }
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static inline u32 i2c_hid_get_dmi_quirks(const u16 vendor, const u16 product)
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{ return 0; }
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#endif
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/**
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* struct i2chid_ops - Ops provided to the core.
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*
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* @power_up: do sequencing to power up the device.
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* @power_down: do sequencing to power down the device.
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* @shutdown_tail: called at the end of shutdown.
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*/
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struct i2chid_ops {
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int (*power_up)(struct i2chid_ops *ops);
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void (*power_down)(struct i2chid_ops *ops);
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void (*shutdown_tail)(struct i2chid_ops *ops);
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};
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int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops,
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u16 hid_descriptor_address, u32 quirks);
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int i2c_hid_core_remove(struct i2c_client *client);
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void i2c_hid_core_shutdown(struct i2c_client *client);
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extern const struct dev_pm_ops i2c_hid_core_pm;
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#endif
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