linux-kernel - Re: [PATCH v20 1/4] usb: Add support for Intel LJCA device

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Date:   Mon, 9 Oct 2023 12:22:01 +0200
From:   Oliver Neukum <oneukum@...e.com>
To:     Wentong Wu <wentong.wu@...el.com>, gregkh@...uxfoundation.org,
        oneukum@...e.com, wsa@...nel.org, andi.shyti@...ux.intel.com,
        broonie@...nel.org
Cc:     bartosz.golaszewski@...aro.org, linus.walleij@...aro.org,
        hdegoede@...hat.com, linux-usb@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-spi@...r.kernel.org,
        sakari.ailus@...ux.intel.com, zhifeng.wang@...el.com,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v20 1/4] usb: Add support for Intel LJCA device

On 09.10.23 08:33, Wentong Wu wrote:
> Implements the USB part of Intel USB-I2C/GPIO/SPI adapter device
> named "La Jolla Cove Adapter" (LJCA).
> 
> The communication between the various LJCA module drivers and the
> hardware will be muxed/demuxed by this driver. Three modules (
> I2C, GPIO, and SPI) are supported currently.
> 
> Each sub-module of LJCA device is identified by type field within
> the LJCA message header.
> 
> The sub-modules of LJCA can use ljca_transfer() to issue a transfer
> between host and hardware. And ljca_register_event_cb is exported
> to LJCA sub-module drivers for hardware event subscription.
> 
> The minimum code in ASL that covers this board is
> Scope (\_SB.PCI0.DWC3.RHUB.HS01)
>      {
>          Device (GPIO)
>          {
>              Name (_ADR, Zero)
>              Name (_STA, 0x0F)
>          }
> 
>          Device (I2C)
>          {
>              Name (_ADR, One)
>              Name (_STA, 0x0F)
>          }
> 
>          Device (SPI)
>          {
>              Name (_ADR, 0x02)
>              Name (_STA, 0x0F)
>          }
>      }
> 
> Signed-off-by: Wentong Wu <wentong.wu@...el.com>
> Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Reviewed-by: Andi Shyti <andi.shyti@...ux.intel.com>
> Tested-by: Hans de Goede <hdegoede@...hat.com>
Reviewed-by: Oliver Neukum <oneukum@...e.com>