Changes in Kconfig

794b5e7727de1ebaa07366ae346a139870874c2d - bluetooth: remove all PCMCIA drivers

Sun, 03 May 2026 05:31:21 +0200

bluetooth: remove all PCMCIA driversPCMCIA is almost completely obsolete (the last computers supporting itnatively were from ~2009), and the general consensus [1] seems to bethat support for it should be gradually removed from the kernel.In 2023, an initial step of removing all the PCMCIA char drivers wastaken in commit 9b12f050c76f ("char: pcmcia: remove all the drivers"),and that has not been reverted, so it seems logical to continue thisprocess by removing more low-hanging fruit.These three Bluetooth drivers have had no meaningful changes sincetheir status was discussed in 2022 [2], and are unlikely to have anyremaining users. The latest functional change to any of them was apatch to bluecard_cs to fix LED blinking behavior in 2017. The othertwo drivers have not had any meaningful changes made since 2007. Removethem.Note that even with these drivers removed, it is still possible to useother PCMCIA Bluetooth cards that present themselves as a standardserial port via serial_cs and hciattach while the serial_cs driver isstill present.[1] https://lore.kernel.org/all/c5b39544-a4fb-4796-a046-0b9be9853787@app.fastmail.com/[2] https://lore.kernel.org/all/Y07d7rMvd5++85BJ@owl.dominikbrodowski.net/Signed-off-by: Ethan Nelson-Moore Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

2d00975c841fa2e52921353392ce9780843bfee7 - Bluetooth: btintel_pcie: Support Product level reset

Mon, 13 Apr 2026 06:20:40 +0200

Bluetooth: btintel_pcie: Support Product level resetWhen driver encounters a TOP exception, ACPI methods will be calledfor Product level reset since Wifi and BT share the same TOP. BT driverwill first reprobe the wifi driver and then reprobe BT.Signed-off-by: Chandrashekar Devegowda Signed-off-by: Venkat Rao Bagalkote Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

97fdb2ea06efdde784480934d1ff60eb21e88b58 - Bluetooth: hci_h5: implement CRC data integrity

Tue, 30 Sep 2025 00:59:21 +0200

Bluetooth: hci_h5: implement CRC data integrityThe UART-based H5 protocol supports CRC data integrity checks forreliable packets. The host sets bit 5 in the configuration field of theCONFIG link control message to indicate that CRC is supported. Thecontroller sets the same bit in the CONFIG RESPONSE message to indicatethat CRC may be used from then on.Tested on a MangoPi MQ-Pro with a Realtek RTL8723DS Bluetooth controllerusing the tip of the bluetooth-next tree.Signed-off-by: Javier Nieto Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

1c5091a9b4c990a6fcf8de7d0e97dba4cf878f17 - Bluetooth: Fix build after header cleanup

Tue, 02 Sep 2025 17:43:44 +0200

Bluetooth: Fix build after header cleanupSome Kconfig dependencies are needed after my recent cleanup, sincethe core code has its own option.Since btmtksdio does not actually call h4_recv_buf(), move thedefinitions it uses outside the BT_HCIUART_H4 gate in hci_uart.h toavoid adding a dependency for btmtksdio.The rest I touched (bpa10x, btmtkuart, and btnxpuart) do really callh4_recv_buf(), so the dependency is required, add it for them.Fixes: 0e272fc7e17d ("Bluetooth: remove duplicate h4_recv_buf() in header")Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202508300413.OnIedvRh-lkp@intel.com/Signed-off-by: Calvin Owens Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

f330734a6315ab3360a524946ea624675b246956 - Revert "Bluetooth: btusb: Configure altsetting for HCI_USER_CHANNEL"

Wed, 16 Apr 2025 11:53:37 +0200

Revert "Bluetooth: btusb: Configure altsetting for HCI_USER_CHANNEL"This reverts commit 75ddcd5ad40ecd9fbc9f5a7a2ed0e1e74921db3c.This patch doesn't work quite well - It's observed that with this patchHFP is flaky on most of the existing USB Bluetooth controllers: Intelchips sometimes send out no packet for Transparent codec; MTK chips maygenerate SCO data with a wrong handle for CVSD codec; RTK could splitthe data with a wrong packet size for Transparent codec; ... etc.Cc: chromeos-bluetooth-upstreaming@chromium.orgSigned-off-by: Hsin-chen Chuang Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

75ddcd5ad40ecd9fbc9f5a7a2ed0e1e74921db3c - Bluetooth: btusb: Configure altsetting for HCI_USER_CHANNEL

Thu, 27 Feb 2025 18:14:10 +0100

Bluetooth: btusb: Configure altsetting for HCI_USER_CHANNELAutomatically configure the altsetting for HCI_USER_CHANNEL when a SCOis connected.The motivation is to enable the HCI_USER_CHANNEL user to send out SCOdata through USB Bluetooth chips, which is mainly used for bidirectionalaudio transfer (voice call). This was not capable because:- Per Bluetooth Core Spec v5, Vol 4, Part B, 2.1, the corresponding alternate setting should be set based on the air mode in order to transfer SCO data, but- The Linux Bluetooth HCI_USER_CHANNEL exposes the Bluetooth Host Controller Interface to the user space, which is something above the USB layer. The user space is not able to configure the USB alt while keeping the channel open.This patch intercepts the HCI_EV_SYNC_CONN_COMPLETE packets in btusb,extracts the air mode, and configures the alt setting in btusb.This patch is tested on ChromeOS devices. The USB Bluetooth models(CVSD, TRANS alt3 and alt6) could work without a customized kernel.Fixes: b16b327edb4d ("Bluetooth: btusb: add sysfs attribute to control USB alt setting")Signed-off-by: Hsin-chen Chuang Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

f062b6ecc798664ec4ad4a5f484c8456d2667059 - Bluetooth: add HAS_IOPORT dependencies

Thu, 24 Oct 2024 19:54:41 +0200

Bluetooth: add HAS_IOPORT dependenciesIn a future patch HAS_IOPORT=n will disable inb()/outb() and friends atcompile time. We thus need to add HAS_IOPORT as dependency for thosedrivers using them.Co-developed-by: Arnd Bergmann Signed-off-by: Arnd Bergmann Signed-off-by: Niklas Schnelle Acked-by: Lucas De Marchi Signed-off-by: Arnd Bergmann List of files: /linux/drivers/bluetooth/Kconfig

37bac77e4649e8158698a60addc22ec4faf5649a - Bluetooth: hci_uart: Add support for Amlogic HCI UART

Fri, 09 Aug 2024 07:42:25 +0200

Bluetooth: hci_uart: Add support for Amlogic HCI UARTAdd a new HCI protocol HCI_UART_AML for the Amlogic Bluetoothcontroller. It works on the standard H4 protocol via a 4-wire UARTinterface, with baud rates up to 4 Mbps.The controller supports two types of commands: the TCI commands and thevendor command. The former is for initial setup including setting baudrates, downloading fw, starting chip and etc, while the latter is fordumping firmware versions and setting public address after firmwareupdates and normal startup.It was verified on board of T602 (S905X4 + W265S2).dmesg:..[ 5.313450] Bluetooth: HCI UART protocol AML registered[ 6.506052] Bluetooth: hci0: fw_version: date = 42.28, number = 0xb2fd...Co-developed-by: Ye He Signed-off-by: Ye He Signed-off-by: Yang Li Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

61f7a8f975456d7be21100ee0936389142b95a81 - Bluetooth: btmtk: Fix btmtk.c undefined reference build error harder

Mon, 22 Jul 2024 11:27:05 +0200

Bluetooth: btmtk: Fix btmtk.c undefined reference build error harderThe previous fix was incomplete as the link failure still persistswith CONFIG_USB=m when the sdio or serial wrappers for btmtk.care build-in:btmtk.c:(.text+0x468): undefined reference to `usb_alloc_urb'btmtk.c:(.text+0x488): undefined reference to `usb_free_urb'btmtk.c:(.text+0x500): undefined reference to `usb_anchor_urb'btmtk.c:(.text+0x50a): undefined reference to `usb_submit_urb'btmtk.c:(.text+0x92c): undefined reference to `usb_control_msg'btmtk.c:(.text+0xa92): undefined reference to `usb_unanchor_urb'btmtk.c:(.text+0x11e4): undefined reference to `usb_set_interface'btmtk.c:(.text+0x120a): undefined reference to `usb_kill_anchored_urbs'Disallow this configuration.Fixes: f0c83a23fcbb ("Bluetooth: btmtk: Fix btmtk.c undefined reference build error")Signed-off-by: Arnd Bergmann Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

b96bac9607b285d4316e74fbf469df084c4f8adb - Bluetooth: hci: fix build when POWER_SEQUENCING=m

Sun, 23 Jun 2024 19:13:52 +0200

Bluetooth: hci: fix build when POWER_SEQUENCING=mBT_HCIUART_QCA, which is a bool and an HCI UART component, uses nowpower sequencing, so we need to be sure BT_HCIUART_QCA=y andPOWER_SEQUENCING=m cannot happen: /usr/bin/aarch64-linux-gnu-ld: drivers/bluetooth/hci_qca.o: in function `qca_serdev_probe': drivers/bluetooth/hci_qca.c:2401:(.text+0xc48): undefined reference to `devm_pwrseq_get' /usr/bin/aarch64-linux-gnu-ld: drivers/bluetooth/hci_qca.o: in function `qca_power_shutdown': drivers/bluetooth/hci_qca.c:2192:(.text+0x29e8): undefined reference to `pwrseq_power_off' /usr/bin/aarch64-linux-gnu-ld: drivers/bluetooth/hci_qca.o: in function `qca_power_on': drivers/bluetooth/hci_qca.c:1808:(.text+0x3390): undefined reference to `pwrseq_power_on'Fixes: 9a15ce685706 ("Bluetooth: qca: use the power sequencer for QCA6390")Signed-off-by: Krzysztof Kozlowski Reviewed-by: Bartosz Golaszewski Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

08c22b52262041164990eef4b0e076bce173a3b2 - Bluetooth: hci_bcm4377: Add BCM4388 support

Sun, 02 Jun 2024 11:57:05 +0200

Bluetooth: hci_bcm4377: Add BCM4388 supportThis new variant needs a different core2_window1 and always usesbeamforming.The BAR2 also has an offset (RAM start, presumably), so add that.Signed-off-by: Hector Martin Reviewed-by: Sven Peter [sven: rebased, updated some comments, mentioned 4388 in Kconfig]Signed-off-by: Sven Peter Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

c2b636b3f788d10486a6691ad6dd3ec4c93bd78e - Bluetooth: btintel_pcie: Add support for PCIe transport

Tue, 07 May 2024 17:56:57 +0200

Bluetooth: btintel_pcie: Add support for PCIe transportAdd initial code to support Intel bluetooth devices based on PCIetransport. Allocate memory for TX & RX buffers, internal structures,initialize interrupts for TX & RX and PCIe device.Signed-off-by: Tedd Ho-Jeong An Suggested-by: Bjorn Helgaas Suggested-by: Paul Menzel Signed-off-by: Kiran K Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

ab4e4380d4e158486e595013a2635190e07e28ce - Bluetooth: Add vhci devcoredump support

Thu, 30 Mar 2023 18:58:24 +0200

Bluetooth: Add vhci devcoredump supportAdd devcoredump support for vhci that creates forcce_devcoredump debugfsentry. This is used for mgmt-tester tests.Signed-off-by: Manish Mandlik Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

11e29b4a3fda975f4427800285b7e4544f4e9152 - Bluetooth: NXP: select CONFIG_CRC8

Wed, 22 Mar 2023 12:16:27 +0100

Bluetooth: NXP: select CONFIG_CRC8The driver needs both CRC32 and CRC8 to link correctly:ld: drivers/bluetooth/btnxpuart.o: in function `nxp_serdev_probe':drivers/bluetooth/btnxpuart.c:1214: undefined reference to`crc8_populate_msb'ld: drivers/bluetooth/btnxpuart.o: in function `nxp_send_ack':drivers/bluetooth/btnxpuart.c:559: undefined reference to `crc8'ld: drivers/bluetooth/btnxpuart.c:559: undefined reference to `crc8'Fixes: 3e662aa4453a ("Bluetooth: NXP: Add protocol support for NXP Bluetooth chipsets")Signed-off-by: Arnd Bergmann Reviewed-by: Ilpo Järvinen Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

689ca16e523278470c38832a3010645a78c544d8 - Bluetooth: NXP: Add protocol support for NXP Bluetooth chipsets

Thu, 16 Mar 2023 18:22:14 +0100

Bluetooth: NXP: Add protocol support for NXP Bluetooth chipsetsThis adds a driver based on serdev driver for the NXP BT serial protocolbased on running H:4, which can enable the built-in Bluetooth deviceinside an NXP BT chip.This driver has Power Save feature that will put the chip into sleep statewhenever there is no activity for 2000ms, and will be woken up when anyactivity is to be initiated over UART.This driver enables the power save feature by default by sending the vendorspecific commands to the chip during setup.During setup, the driver checks if a FW is already running on the chipby waiting for the bootloader signature, and downloads device specific FWfile into the chip over UART if bootloader signature is received..Signed-off-by: Neeraj Sanjay Kale Reviewed-by: Ilpo Järvinen Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

8a06127602de70541e751a8c64a06995ee281f22 - Bluetooth: hci_bcm4377: Add new driver for BCM4377 PCIe boards

Fri, 04 Nov 2022 22:13:03 +0100

Bluetooth: hci_bcm4377: Add new driver for BCM4377 PCIe boardsBroadcom BCM4377/4378/4387 are dual WiFi/Bluetooth boards found in Applemachines. This driver adds support for the Bluetooth function whichexposes a shared memory IPC protocol over PCIe to tunnel HCI traffic.Signed-off-by: Sven Peter Signed-off-by: Luiz Augusto von Dentz List of files: /linux/drivers/bluetooth/Kconfig

db11223571d489d1aab575a4ac4b7352d2d54e2f - Bluetooth: btusb: Default CONFIG_BT_HCIBTUSB_POLL_SYNC=y

Tue, 25 Oct 2022 23:12:58 +0200

Bluetooth: btusb: Default CONFIG_BT_HCIBTUSB_POLL_SYNC=ypoll_sync has been proven to fix races of USB data and event endpointsso this enables it by default.Signed-off-by: Luiz Augusto von Dentz Tested-by: Tedd Ho-Jeong An List of files: /linux/drivers/bluetooth/Kconfig

bb1afb2955212d30177b122b13ae636a69abf883 - Bluetooth: btusb: Add CONFIG_BT_HCIBTUSB_POLL_SYNC

Tue, 25 Oct 2022 23:12:57 +0200

Bluetooth: btusb: Add CONFIG_BT_HCIBTUSB_POLL_SYNCThis adds CONFIG_BT_HCIBTUSB_POLL_SYNC which can be used to set thedefault behavior of Bluetooth USB controller with respect to pollsynchronization of its endpoits.Signed-off-by: Luiz Augusto von Dentz Tested-by: Tedd Ho-Jeong An List of files: /linux/drivers/bluetooth/Kconfig

f5c3f98946e37a1f7ca07a6c6ab33b1223661aec - Bluetooth: btmtkuart: rely on BT_MTK module

Wed, 09 Mar 2022 01:03:52 +0100

Bluetooth: btmtkuart: rely on BT_MTK moduleRely on btmtk module to reduce duplicated codeSigned-off-by: Sean Wang Signed-off-by: Marcel Holtmann List of files: /linux/drivers/bluetooth/Kconfig

3a722044aacf7f8524226951515dbc0390e030e0 - Bluetooth: btmtksido: rely on BT_MTK module

Mon, 18 Oct 2021 23:30:13 +0200

Bluetooth: btmtksido: rely on BT_MTK moduleRely on btmtk module to reduce duplicated codeSigned-off-by: Sean Wang Signed-off-by: Marcel Holtmann List of files: /linux/drivers/bluetooth/Kconfig