linux-kernel - [PATCH v1 0/3] usb: misc: usb3503: support usb3803 and bypass mode

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Message-Id: <20230313165039.255579-1-francesco@dolcini.it>
Date:   Mon, 13 Mar 2023 17:50:36 +0100
From:   Francesco Dolcini <francesco@...cini.it>
To:     linux-usb@...r.kernel.org
Cc:     Francesco Dolcini <francesco.dolcini@...adex.com>,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH v1 0/3] usb: misc: usb3503: support usb3803 and bypass mode

From: Francesco Dolcini <francesco.dolcini@...adex.com>

Add support for USB3803 and bypass mode.

While the usb3503 variant uses a HSIC connection to upstream, the usb3803 uses
a regular USB connection and provides a bypass mode.

In bypass mode the downstream port 3 is connected to the upstream port with low
switch resistance R_on.

Controlling mode of operations:

| RESET_N | BYPASS_N | Mode    |
--------------------------------
|    0    |    0     | standby |
|    1    |    0     | bypass  |
|    1    |    1     | hub     |


Emanuele Ghidoli (3):
  dt-bindings: usb: smsc,usb3503: Add usb3803
  usb: misc: usb3503: refactor code to prepare for usb3803 addition
  usb: misc: usb3503: support usb3803 and bypass mode

 .../devicetree/bindings/usb/smsc,usb3503.yaml | 54 +++++++++++++++-
 drivers/usb/misc/usb3503.c                    | 64 +++++++++++--------
 include/linux/platform_data/usb3503.h         |  1 +
 3 files changed, 92 insertions(+), 27 deletions(-)

-- 
2.25.1