From 1bdb68b2e841a94b4331046ad6a55e94f214dbbf Mon Sep 17 00:00:00 2001
From: Ian W MORRISON <ianwmorrison@gmail.com>
Date: Sat, 7 Oct 2017 17:15:25 +1100
Subject: [PATCH] Bluetooth: hci_bcm: Add support for MINIX Z83-4 based devices
Git-commit: 1bdb68b2e841a94b4331046ad6a55e94f214dbbf
Patch-mainline: v4.15-rc1
References: bsc#1051510

The MINIX NEO Z83-4 and MINIX NEO Z83-4 Pro devices use an AP6255 chip for
wifi and bluetooth. Bluetooth requires an ACPI device id of BCM2EA4 with
BCM4345 rev C0 firmware.

This patch adds the device id and to use trigger type IRQF_TRIGGER_FALLING
as defined by 'GpioInt' in the ACPI DSDT table:

    Device (BLT0)
    {
        Name (_HID, "BCM2EA4")  // _HID: Hardware ID
        Method (_STA, 0, NotSerialized)  // _STA: Status
        {
            Return (0x0F)
        }

        Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
        {
            Name (UBUF, ResourceTemplate ()
            {
                UartSerialBusV2 (0x0001C200, DataBitsEight, StopBitsOne,
                    0xFC, LittleEndian, ParityTypeNone, FlowControlHardware,
                    0x0020, 0x0020, "\\_SB.PCI0.URT1",
                    0x00, ResourceConsumer, , Exclusive,
                    )
                GpioInt (Level, ActiveLow, Exclusive, PullNone, 0x0000,
                    "\\_SB.GPO1", 0x00, ResourceConsumer, ,
                    )
                    {   // Pin list
                        0x0005
                    }
                GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
                    "\\_SB.GPO1", 0x00, ResourceConsumer, ,
                    )
                    {   // Pin list
                        0x0007
                    }
                GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
                    "\\_SB.GPO1", 0x00, ResourceConsumer, ,
                    )
                    {   // Pin list
                        0x0004
                    }
            })
            Return (UBUF) /* \_SB_.PCI0.URT1.BLT0._CRS.UBUF */
        }
    }

Signed-off-by: Ian W MORRISON <ianwmorrison@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/bluetooth/hci_bcm.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -684,6 +684,13 @@ static const struct dmi_system_id bcm_ac
 			DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"),
 		},
 	},
+	{
+		.ident = "MINIX Z83-4",
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "MINIX"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
+		},
+	},
 	{ }
 };
 
@@ -894,6 +901,7 @@ static const struct acpi_device_id bcm_a
 	{ "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
 	{ "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
 	{ "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
+	{ "BCM2EA4", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);