linux-kernel - RE: [PATCH v3 2/3] dt-bindings: net: bluetooth: Add NXP bluetooth support

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Date:   Thu, 16 Feb 2023 10:45:36 +0000
From:   Sherry Sun <sherry.sun@....com>
To:     Neeraj sanjay kale <neeraj.sanjaykale@....com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "marcel@...tmann.org" <marcel@...tmann.org>,
        "johan.hedberg@...il.com" <johan.hedberg@...il.com>,
        "luiz.dentz@...il.com" <luiz.dentz@...il.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "jirislaby@...nel.org" <jirislaby@...nel.org>,
        "alok.a.tiwari@...cle.com" <alok.a.tiwari@...cle.com>,
        "hdanton@...a.com" <hdanton@...a.com>,
        "ilpo.jarvinen@...ux.intel.com" <ilpo.jarvinen@...ux.intel.com>,
        "leon@...nel.org" <leon@...nel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-bluetooth@...r.kernel.org" <linux-bluetooth@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        Amitkumar Karwar <amitkumar.karwar@....com>,
        Rohit Fule <rohit.fule@....com>, Jun Li <jun.li@....com>,
        Bough Chen <haibo.chen@....com>
Subject: RE: [PATCH v3 2/3] dt-bindings: net: bluetooth: Add NXP bluetooth
 support



> -----Original Message-----
> From: Neeraj sanjay kale <neeraj.sanjaykale@....com>
> Sent: 2023年2月13日 22:55
> To: davem@...emloft.net; edumazet@...gle.com; kuba@...nel.org;
> pabeni@...hat.com; robh+dt@...nel.org;
> krzysztof.kozlowski+dt@...aro.org; marcel@...tmann.org;
> johan.hedberg@...il.com; luiz.dentz@...il.com;
> gregkh@...uxfoundation.org; jirislaby@...nel.org; alok.a.tiwari@...cle.com;
> hdanton@...a.com; ilpo.jarvinen@...ux.intel.com; leon@...nel.org
> Cc: netdev@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org; linux-bluetooth@...r.kernel.org; linux-
> serial@...r.kernel.org; Amitkumar Karwar <amitkumar.karwar@....com>;
> Rohit Fule <rohit.fule@....com>; Sherry Sun <sherry.sun@....com>; Neeraj
> sanjay kale <neeraj.sanjaykale@....com>
> Subject: [PATCH v3 2/3] dt-bindings: net: bluetooth: Add NXP bluetooth
> support
> 
> Add binding document for NXP bluetooth chipsets attached over UART.
> 
> Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@....com>
> ---
> v2: Resolved dt_binding_check errors. (Rob Herring)
> v2: Modified description, added specific compatibility devices, corrected
> indentations. (Krzysztof Kozlowski)
> v3: Modified description, renamed file (Krzysztof Kozlowski)
> ---
>  .../bindings/net/bluetooth/nxp,w8xxx-bt.yaml  | 44 +++++++++++++++++++
>  MAINTAINERS                                   |  7 +++
>  2 files changed, 51 insertions(+)
>  create mode 100644
> Documentation/devicetree/bindings/net/bluetooth/nxp,w8xxx-bt.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/bluetooth/nxp,w8xxx-
> bt.yaml b/Documentation/devicetree/bindings/net/bluetooth/nxp,w8xxx-
> bt.yaml
> new file mode 100644
> index 000000000000..2685f6d5904f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/bluetooth/nxp,w8xxx-
> bt.yaml
> @@ -0,0 +1,44 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/bluetooth/nxp-bluetooth.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP Bluetooth chips
> +
> +description:
> +  This binding describes UART-attached NXP bluetooth chips.
> +  These chips are dual-radio chips supporting WiFi and Bluetooth,
> +  except for iw612, which is a tri-radio chip supporting 15.4
> +  as well.
> +  The bluetooth works on standard H4 protocol over 4-wire UART.
> +  The RTS and CTS lines are used during FW download.
> +  To enable power save mode, the host asserts break signal
> +  over UART-TX line to put the chip into power save state.
> +  De-asserting break wakes-up the BT chip.
> +
> +maintainers:
> +  - Neeraj Sanjay Kale <neeraj.sanjaykale@....com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - nxp,88w8987-bt
> +      - nxp,88w8997-bt
> +      - nxp,88w9098-bt
> +      - nxp,iw416-bt
> +      - nxp,iw612-bt
Hi Neeraj,

No need to set one compatible for each NXP BT chip I think, otherwise the list will get longer and longer.
You can use one common compatible for all the new BT chips which support V3 bootloader, then you will get the chip ID from the bootloader in driver to distinguish the chips.

Best Regards
Sherry


> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    uart2 {
> +        uart-has-rtscts;
> +        bluetooth {
> +          compatible = "nxp,iw416-bt";
> +        };
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 32dd41574930..211fc667c0ec 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -22835,6 +22835,13 @@ L:	linux-mm@...ck.org
>  S:	Maintained
>  F:	mm/zswap.c
> 
> +NXP BLUETOOTH WIRELESS DRIVERS
> +M:	Amitkumar Karwar <amitkumar.karwar@....com>
> +M:	Neeraj Kale <neeraj.sanjaykale@....com>
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/net/bluetooth/nxp-
> bluetooth.yaml
> +F:	drivers/bluetooth/btnxpuart*
> +
>  THE REST
>  M:	Linus Torvalds <torvalds@...ux-foundation.org>
>  L:	linux-kernel@...r.kernel.org
> --
> 2.34.1