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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-12-09 23:57:38 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-12-19 13:34:15 +0300 |
| commit | 93ffa9a479ffb65d045e74e141346e7f107fcde1 (patch) | |
| tree | 796ede7c9f1d849f055c197dec491c64725bc173 /arch/x86/kernel/acpi | |
| parent | 2b4c91569a40c4512ea1b413e0c817d179ce9868 (diff) | |
| download | linux-93ffa9a479ffb65d045e74e141346e7f107fcde1.tar.xz | |
x86/init: Add i8042 state to the platform data
Add i8042 state to the platform data to help i8042 driver make decision
whether to probe for i8042 or not. We recognize 3 states: platform/subarch
ca not possible have i8042 (as is the case with Inrel MID platform),
firmware (such as ACPI) reports that i8042 is absent from the device,
or i8042 may be present and the driver should probe for it.
The intent is to allow i8042 driver abort initialization on x86 if PNP data
(absence of both keyboard and mouse PNP devices) agrees with firmware data.
It will also allow us to remove i8042_detect later.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Cc: linux-input@vger.kernel.org
Link: http://lkml.kernel.org/r/1481317061-31486-2-git-send-email-dmitry.torokhov@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/acpi')
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 6f65b0eed384..64422f850e95 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -930,6 +930,13 @@ static int __init acpi_parse_fadt(struct acpi_table_header *table) x86_platform.legacy.devices.pnpbios = 0; } + if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && + !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && + x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { + pr_debug("ACPI: i8042 controller is absent\n"); + x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; + } + if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { pr_debug("ACPI: not registering RTC platform device\n"); x86_platform.legacy.rtc = 0; |