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93ffa9a479
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>
40 lines
1,008 B
C
40 lines
1,008 B
C
#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/setup.h>
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#include <asm/bios_ebda.h>
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void __init x86_early_init_platform_quirks(void)
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{
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x86_platform.legacy.i8042 = X86_LEGACY_I8042_EXPECTED_PRESENT;
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x86_platform.legacy.rtc = 1;
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x86_platform.legacy.reserve_bios_regions = 0;
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x86_platform.legacy.devices.pnpbios = 1;
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switch (boot_params.hdr.hardware_subarch) {
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case X86_SUBARCH_PC:
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x86_platform.legacy.reserve_bios_regions = 1;
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break;
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case X86_SUBARCH_XEN:
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case X86_SUBARCH_LGUEST:
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x86_platform.legacy.devices.pnpbios = 0;
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x86_platform.legacy.rtc = 0;
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break;
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case X86_SUBARCH_INTEL_MID:
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case X86_SUBARCH_CE4100:
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x86_platform.legacy.devices.pnpbios = 0;
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x86_platform.legacy.rtc = 0;
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x86_platform.legacy.i8042 = X86_LEGACY_I8042_PLATFORM_ABSENT;
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break;
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}
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if (x86_platform.set_legacy_features)
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x86_platform.set_legacy_features();
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}
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#if defined(CONFIG_PNPBIOS)
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bool __init arch_pnpbios_disabled(void)
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{
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return x86_platform.legacy.devices.pnpbios == 0;
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}
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#endif
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