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| author | Hans de Goede <hdegoede@redhat.com> | 2021-11-02 23:55:04 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2021-12-22 11:14:14 +0000 |
| commit | 6202b5de73cfb0d83245b8ea834017183ec67885 (patch) | |
| tree | 6a2a873a2a186ec31b753cf95a6f3e5add099094 /net/switchdev/switchdev.c | |
| parent | 92add941b6be185e511a7564bf68963fa1633d53 (diff) | |
| download | linux-6202b5de73cfb0d83245b8ea834017183ec67885.tar.gz linux-6202b5de73cfb0d83245b8ea834017183ec67885.tar.bz2 linux-6202b5de73cfb0d83245b8ea834017183ec67885.zip | |
backlight: lp855x: Add support ACPI enumeration
The Xiaomi Mi Pad 2 tablet uses an ACPI enumerated LP8556 backlight
controller for its LCD-panel, with a Xiaomi specific ACPI HID of
"XMCC0001", add support for this.
Note the new "if (id)" check also fixes a NULL pointer deref when a user
tries to manually bind the driver from sysfs.
When CONFIG_ACPI is disabled acpi_match_device() will always return NULL,
so the lp855x_parse_acpi() call will get optimized away.
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211102225504.18920-3-hdegoede@redhat.com
Diffstat (limited to 'net/switchdev/switchdev.c')
0 files changed, 0 insertions, 0 deletions