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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2018-05-23 03:30:07 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-05-24 02:49:22 +0300 |
| commit | df077237cf55928f5ac4b2770488a0aa4d3cd095 (patch) | |
| tree | 25f79e0e75e6f71bd9267ade5873e8a8e65baa95 /drivers/input/mouse/elantech.h | |
| parent | 21c48dbde0944e3d52468008321900af3bdafcf1 (diff) | |
| download | linux-df077237cf55928f5ac4b2770488a0aa4d3cd095.tar.xz | |
Input: elantech - detect new ICs and setup Host Notify for them
New ICs are using a different scheme for the alternate bus parameter.
Given that they are new and are only using either PS2 only or PS2 + SMBus
Host Notify, we force those new ICs to use the SMBus solution for enhanced
reporting.
This allows the touchpad found on the Lenovo T480s to report 5 fingers
every 8 ms, instead of having a limit of 2 every 8 ms.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/mouse/elantech.h')
| -rw-r--r-- | drivers/input/mouse/elantech.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h index f9b1c485e8d9..119727085a60 100644 --- a/drivers/input/mouse/elantech.h +++ b/drivers/input/mouse/elantech.h @@ -116,6 +116,21 @@ #define ETP_BUS_PS2_SMB_HST_NTFY 4 /* + * New ICs are either using SMBus Host Notify or just plain PS2. + * + * ETP_FW_VERSION_QUERY is: + * Byte 1: + * - bit 0..3: IC BODY + * Byte 2: + * - bit 4: HiddenButton + * - bit 5: PS2_SMBUS_NOTIFY + * - bit 6: PS2CRCCheck + */ +#define ETP_NEW_IC_SMBUS_HOST_NOTIFY(fw_version) \ + ((((fw_version) & 0x0f2000) == 0x0f2000) && \ + ((fw_version) & 0x0000ff) > 0) + +/* * The base position for one finger, v4 hardware */ struct finger_pos { |