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forked fromtorvalds/linux

Commit9e811e1

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jwrdegoederafaeljw
authored andcommitted
ACPI: button: Add a LID switch blacklist and add 1 model to it
The GP-electronic T701 tablet does not have a LID switch, but itdoes define a LID device in its DSDT. The _LID method points tothe "\\_SB.GPO2" pin 0x18 GPIO with a pull setting of "PullDefault",which leaves the pin floating.This causes the ACPI button driver to cause spurious LID closed events,causing the device to suspend while the user is using it. There isnothing the ACPI button driver (or the gpio code) can do to fix this,so the only solution is to add a DMI based blacklist and ignore the LIDdevice on these tablets.Signed-off-by: Hans de Goede <hdegoede@redhat.com>Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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‎drivers/acpi/button.c‎

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Original file line numberDiff line numberDiff line change
@@ -30,6 +30,7 @@
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#include<linux/input.h>
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#include<linux/slab.h>
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#include<linux/acpi.h>
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#include<linux/dmi.h>
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#include<acpi/button.h>
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#definePREFIX "ACPI: "
@@ -76,6 +77,22 @@ static const struct acpi_device_id button_device_ids[] = {
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};
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MODULE_DEVICE_TABLE(acpi,button_device_ids);
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/*
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* Some devices which don't even have a lid in anyway have a broken _LID
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* method (e.g. pointing to a floating gpio pin) causing spurious LID events.
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*/
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staticconststructdmi_system_idlid_blacklst[]= {
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{
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/* GP-electronic T701 */
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.matches= {
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DMI_MATCH(DMI_SYS_VENDOR,"Insyde"),
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DMI_MATCH(DMI_PRODUCT_NAME,"T701"),
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DMI_MATCH(DMI_BIOS_VERSION,"BYT70A.YNCHENG.WIN.007"),
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},
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},
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{}
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};
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staticintacpi_button_add(structacpi_device*device);
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staticintacpi_button_remove(structacpi_device*device);
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staticvoidacpi_button_notify(structacpi_device*device,u32event);
@@ -475,6 +492,9 @@ static int acpi_button_add(struct acpi_device *device)
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char*name,*class;
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interror;
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if (!strcmp(hid,ACPI_BUTTON_HID_LID)&&dmi_check_system(lid_blacklst))
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return-ENODEV;
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button=kzalloc(sizeof(structacpi_button),GFP_KERNEL);
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if (!button)
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return-ENOMEM;

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