[net-next,0/8] Extend `phy-mode` to string array

Message

Marek Behún Nov. 17, 2021, 10:50 p.m. UTC

Hello,

this series extends the `phy-connection-type` / `phy-mode` property to
be an array of strings, instead of just one string, and makes the
corresponding changes to code. It then uses this changes to make
marvell10g PHY driver choose the best MACTYPE according to which
phy-modes are supported by the MAC, the PHY and the board.

Conventionaly the `phy-mode` means "this is the mode I want the PHY to
operate in". But we now have some PHYs that may need to change the PHY
mode during operation (marvell10g PHY driver), and so we need to know
all the supported modes. Russell King is working on MAC and PHY drivers
to inform phylink on which PHY interface modes they support, but it is
not enough, because even if a MAC/PHY driver fills all the modes
supported by the driver, still each individual board may have only some
of these modes actually wired.

This series
- changes the type of the `phy-mode` property to be an array of PHY
  interface strings,
- updated documentation of of_get_phy_mode() and related to inform that
  only first mode is returned by these functions (since this function
  is needed to still support conventional usage of the `phy-mode`
  property),
- adds fwnode_get_phy_modes() function which reads the `phy-mode` array
  and fills bitmap with mentioned modes,
- adds code to phylink to intersect the supported interfaces bitmap
  supplied by MAC driver, with interface modes defined in device-tree
  (and keeps backwards compatibility with conventional usage of the
   phy-mode property, for more information read the commit message of
   patch 4/8),
- passes supported interfaces to PHY driver so that it may configure
  a PHY to a specific mode given these interfaces,
- uses this information in marvell10g driver.

Changes since RFC:
- update also description of the `phy-connection-type` property

Marek Behún (7):
  dt-bindings: ethernet-controller: support multiple PHY connection
    types
  net: Update documentation for *_get_phy_mode() functions
  device property: add helper function for getting phy mode bitmap
  net: phylink: update supported_interfaces with modes from fwnode
  net: phylink: pass supported PHY interface modes to phylib
  net: phy: marvell10g: Use generic macro for supported interfaces
  net: phy: marvell10g: Use tabs instead of spaces for indentation

Russell King (1):
  net: phy: marvell10g: select host interface configuration

 .../bindings/net/ethernet-controller.yaml     |  94 ++++++------
 drivers/base/property.c                       |  48 +++++-
 drivers/net/phy/marvell10g.c                  | 140 ++++++++++++++++--
 drivers/net/phy/phylink.c                     |  91 ++++++++++++
 include/linux/phy.h                           |  10 ++
 include/linux/property.h                      |   3 +
 net/core/of_net.c                             |   9 +-
 7 files changed, 325 insertions(+), 70 deletions(-)