[PATCH v3 0/5] usb: xhci: add Port Register struct and tracing

[Niklas Neronin <niklas.neronin@linux.intel.com>]

The aim of this patch set is to introduce tracing for PORTSC writes and 
implement a Port Register Set struct. This is the first part in a larger
series of changes.

Introduces a new struct for the Host Controller USB Port Register Set.
The current implementation accesses these registers through a single
'__le32' pointer, which, in conjunction with a macro, navigates to the
specific register using (base address + offset).

 Currently, how its accessed	| Register Name
--------------------------------------------------------------------------
 port->addr			| Port Status and Control
 port->addr + PORTPMSC		| Port Power Management Status and Control
 port->addr + PORTLI		| Port Link Info
 port->addr + PORTHLPMC		| Port Hardware LPM Control

 After, how its accessed	| Register Name
--------------------------------------------------------------------------
 port->port_reg->portsc		| Port Status and Control
 port->port_reg->portpmsc	| Port Power Management Status and Control
 port->port_reg->portli		| Port Link Info
 port->port_reg->porthlmpc	| Port Hardware LPM Control

These changes make it easier for future modification and their review.

v3 changes:
 * Rebased on top of 6.18-rc1.
 * Further simplified and generalized xhci_decode_portsc().
 * Changed PORTSC read/write functions names.
 * Added EXPORT_SYMBOL_GPL() to PORTSC read/write.
 * Folded rename patch into Port Register struct implementation patch.
v2 changes:
 * Fix acronym spelling to PORTSC from PORTCS, in all commit messages.
 * Add patch introducing xhci_get_portsc().

Niklas Neronin (5):
  usb: xhci: rework xhci_decode_portsc()
  usb: xhci: add tracing for PORTSC register writes
  usb: xhci: add helper to read PORTSC register
  usb: xhci: add USB Port Register Set struct
  usb: xhci: implement USB Port Register Set struct

 drivers/usb/host/xhci-debugfs.c |   6 +-
 drivers/usb/host/xhci-hub.c     | 115 ++++++++++++++++----------------
 drivers/usb/host/xhci-mem.c     |   3 +-
 drivers/usb/host/xhci-pci.c     |   4 +-
 drivers/usb/host/xhci-ring.c    |   2 +-
 drivers/usb/host/xhci-tegra.c   |  12 ++--
 drivers/usb/host/xhci-trace.h   |   5 ++
 drivers/usb/host/xhci.c         |  48 ++++++++-----
 drivers/usb/host/xhci.h         | 102 +++++++++++++++-------------
 9 files changed, 159 insertions(+), 138 deletions(-)

-- 
2.50.1