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Date: Wed, 2 Dec 2015 14:07:18 -0500 From: Wan Zongshun <Vincent.Wan@....com> To: <dmitry.torokhov@...il.coom>, <bp@...en8.de>, <linux-input@...r.kernel.org> CC: <linux-kernel@...r.kernel.org>, <mcuos.com@...il.com>, Wan Zongshun <Vincent.Wan@....com> Subject: [PATCH v2] Implement i8042 detect by BIOS FADT i8042 flag Detecting x86 platform supporting i8042 or not, we should resort to BIOS's FADT i8042 flag per ACPI spec. Currently, Windows is conforming to this spec, and request this flag to detect i8042 supporting. Signed-off-by: Wan Zongshun <Vincent.Wan@....com> --- drivers/input/serio/i8042-x86ia64io.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h index c115565..73686bd 100644 --- a/drivers/input/serio/i8042-x86ia64io.h +++ b/drivers/input/serio/i8042-x86ia64io.h @@ -9,6 +9,7 @@ #ifdef CONFIG_X86 #include <asm/x86_init.h> +#include <linux/acpi.h> #endif /* @@ -1047,6 +1048,9 @@ static int __init i8042_platform_init(void) /* Just return if pre-detection shows no i8042 controller exist */ if (!x86_platform.i8042_detect()) return -ENODEV; + + if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042)) + return -ENODEV; #endif /* -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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