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Date:   Mon, 9 Oct 2023 12:22:01 +0200
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Subject: Re: [PATCH v20 1/4] usb: Add support for Intel LJCA device
To:     Wentong Wu <wentong.wu@intel.com>, gregkh@linuxfoundation.org,
        oneukum@suse.com, wsa@kernel.org, andi.shyti@linux.intel.com,
        broonie@kernel.org
Cc:     bartosz.golaszewski@linaro.org, linus.walleij@linaro.org,
        hdegoede@redhat.com, linux-usb@vger.kernel.org,
        linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org,
        sakari.ailus@linux.intel.com, zhifeng.wang@intel.com,
        linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
References: <1696833205-16716-1-git-send-email-wentong.wu@intel.com>
 <1696833205-16716-2-git-send-email-wentong.wu@intel.com>
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From:   Oliver Neukum <oneukum@suse.com>
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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@intel.com>
> Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
> Tested-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Oliver Neukum <oneukum@suse.com>