[PATCH 0/3] HID: i2c-hid: Fix some PRP0001 touchpads probe after OF/ACPI split

[谢致邦 (XIE Zhibang)]

Before commit b33752c30023 ("HID: i2c-hid: Reorganize so ACPI and OF are
separate modules"), the unified i2c-hid driver handled both PNP0C50 ACPI
devices and hid-over-i2c OF devices. After the split, devices with _HID
"PRP0001" and _DSD compatible "hid-over-i2c" are only probed by
i2c_hid_of, which requires "hid-descr-addr" in the _DSD. Some devices,
for example the Lenovo KaiTian N60d and Inspur CP300L3, provide the HID
descriptor address only through the _DSM method and thus fail to probe.

Patch 1 moves the blacklist check so the function can return early
without wasting an allocation.

Patch 2 moves the _DSM call that gets the HID descriptor address from
i2c-hid-acpi.c to a shared helper in i2c-hid-core.c so both
i2c-hid-acpi.c and i2c-hid-of.c can use it.

Patch 3 calls the common helper as a fallback when "hid-descr-addr" is
missing, and sets safe post-power-on and post-reset-deassert delays.

谢致邦 (XIE Zhibang) (3):
  HID: i2c-hid-acpi: Move blacklist check to probe() before
    devm_kzalloc()
  HID: i2c-hid: Move common ACPI _DSM helper into core
  HID: i2c-hid-of: Fall back to ACPI _DSM when hid-descr-addr is missing

 drivers/hid/i2c-hid/i2c-hid-acpi.c | 42 +++++++-----------------------
 drivers/hid/i2c-hid/i2c-hid-core.c | 35 +++++++++++++++++++++++++
 drivers/hid/i2c-hid/i2c-hid-of.c   | 30 +++++++++++++++++++++
 drivers/hid/i2c-hid/i2c-hid.h      | 11 ++++++++
 4 files changed, 86 insertions(+), 32 deletions(-)

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2.54.0