linux-kernel - [PATCH v2 0/3] Add the DWC3 instance name in traces

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Message-Id: <20260105115325.1765176-1-prashanth.k@oss.qualcomm.com>
Date: Mon,  5 Jan 2026 17:23:22 +0530
From: Prashanth K <prashanth.k@....qualcomm.com>
To: Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Prashanth K <prashanth.k@....qualcomm.com>
Subject: [PATCH v2 0/3] Add the DWC3 instance name in traces

When multiple DWC3 controllers are being used, trace events from
different instances get mixed up making debugging difficult as
there's no way to distinguish which instance generated the trace.

Hence append the controller base address into ftrace. This needs
the following reworks which is addressed using this patch series.

  1. Removal of dep->regs and use dwc->regs everywhere
  2. Use dwc pointer in all dwc3_readl/writel()
  3. Adding the base addr in traces.

Changes in v2:
- Avoid using macros for dwc3_readl/writel()
- Use base address intraces instead of dev name.
- Split the patch into a series.
- Link to v1: https://lore.kernel.org/all/20250825114433.3170867-1-prashanth.k@oss.qualcomm.com/

Prashanth K (3):
  usb: dwc3: Remove of dep->regs
  usb: dwc3: Add dwc pointer to dwc3_readl/writel
  usb: dwc3: Log dwc3 instance name in traces

 drivers/usb/dwc3/core.c    | 200 +++++++++++++++++++------------------
 drivers/usb/dwc3/core.h    |  12 +--
 drivers/usb/dwc3/debugfs.c |  44 ++++----
 drivers/usb/dwc3/drd.c     |  76 +++++++-------
 drivers/usb/dwc3/ep0.c     |  22 ++--
 drivers/usb/dwc3/gadget.c  | 164 +++++++++++++++---------------
 drivers/usb/dwc3/gadget.h  |   4 +-
 drivers/usb/dwc3/io.h      |  11 +-
 drivers/usb/dwc3/trace.h   |  88 ++++++++++------
 drivers/usb/dwc3/ulpi.c    |  10 +-
 10 files changed, 328 insertions(+), 303 deletions(-)

-- 
2.34.1