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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2017-03-02 21:48:23 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-03-25 20:37:29 +0300 |
| commit | 8eb92e5c91338eb19f86ffb2232258337ebf905b (patch) | |
| tree | 2945e2b7f324c0a3d8da4aebefa27b145ffb7d6f /drivers/input/mouse/psmouse.h | |
| parent | c774326a219536ab615d68a22875673f6f608b62 (diff) | |
| download | linux-8eb92e5c91338eb19f86ffb2232258337ebf905b.tar.xz | |
Input: psmouse - add support for SMBus companions
This provides glue between PS/2 devices that enumerate the RMI4 devices
and Elan touchpads to the RMI4 (or Elan) SMBus driver.
The SMBus devices keep their PS/2 connection alive. If the initialization
process goes too far (psmouse_activate called), the device disconnects
from the I2C bus and stays on the PS/2 bus, that is why we explicitly
disable PS/2 device reporting (by calling psmouse_deactivate) before
trying to register SMBus companion device.
The HID over I2C devices are enumerated through the ACPI DSDT, and
their PS/2 device also exports the InterTouch bit in the extended
capability 0x0C. However, the firmware keeps its I2C connection open
even after going further in the PS/2 initialization. We don't need
to take extra precautions with those device, especially because they
block their PS/2 communication when HID over I2C is used.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/mouse/psmouse.h')
| -rw-r--r-- | drivers/input/mouse/psmouse.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h index e853dee05e79..05110832109c 100644 --- a/drivers/input/mouse/psmouse.h +++ b/drivers/input/mouse/psmouse.h @@ -209,5 +209,34 @@ static struct psmouse_attribute psmouse_attr_##_name = { \ &(psmouse)->ps2dev.serio->dev, \ psmouse_fmt(format), ##__VA_ARGS__) +#ifdef CONFIG_MOUSE_PS2_SMBUS + +int psmouse_smbus_module_init(void); +void psmouse_smbus_module_exit(void); + +struct i2c_board_info; + +int psmouse_smbus_init(struct psmouse *psmouse, + const struct i2c_board_info *board, + const void *pdata, size_t pdata_size, + bool leave_breadcrumbs); +void psmouse_smbus_cleanup(struct psmouse *psmouse); + +#else /* !CONFIG_MOUSE_PS2_SMBUS */ + +static inline int psmouse_smbus_module_init(void) +{ + return 0; +} + +static inline void psmouse_smbus_module_exit(void) +{ +} + +static inline void psmouse_smbus_cleanup(struct psmouse *psmouse) +{ +} + +#endif /* CONFIG_MOUSE_PS2_SMBUS */ #endif /* _PSMOUSE_H */ |