This patch set is introducing PHY support for CAN. Why it is needed? - A usual CAN PHY has an enable or silent mode pin. This pin needs to be pulled into the correct direction, so that the CAN controller can access the CAN network. So far this has been "hacked" into the CAN controller driver, by enabling/disabling regulators. Better use proper PHY drivers instead. - Bit rate limits. There are different types of CAN PHYs not all support all bit rates. Further the upper limit of CAN FD PHYs is not given by the standard by by the PHY itself. Use the PHY link framework to validate bit rate limits. - The upcoming CAN SIC and CAN SIC XL PHYs use a different interface to the CAN controller. This means the controller needs to know which type of PHY is attached to configure the interface in the correct mode. Use PHY link for that, too. - Another topic is cable testing/diagnostics. Unfortunately this is not standardized in CAN, but there are several boards that implement CAN cable testing in some way or another. Use PHY framework as an abstraction. - The class of CAN low-speed PHYs has enhanced error detection capabilities, compared to normal (CAN high-speed and CAN FD) PHYs. Use PHY framework to implement CAN low-speed PHY drivers. Oleksij Rempel (6): net: phy: add CAN PHY Virtual Bus net: phy: add a driver for generic CAN PHYs net: phy: add CAN interface mode net: add CAN specific link modes can: flexcan: add phylink support can: flexcan: add ethtool support drivers/net/can/Kconfig | 2 + drivers/net/can/flexcan.c | 244 +++++++++++++++++++++++++++++++++- drivers/net/phy/Kconfig | 14 ++ drivers/net/phy/Makefile | 2 + drivers/net/phy/can_phy_bus.c | 196 +++++++++++++++++++++++++++ drivers/net/phy/can_phy_drv.c | 236 ++++++++++++++++++++++++++++++++ drivers/net/phy/phy-core.c | 2 +- drivers/net/phy/phy.c | 2 + include/linux/can/phy.h | 21 +++ include/linux/phy.h | 3 + include/uapi/linux/ethtool.h | 9 ++ net/ethtool/common.c | 7 + net/ethtool/linkmodes.c | 7 + 13 files changed, 743 insertions(+), 2 deletions(-) create mode 100644 drivers/net/phy/can_phy_bus.c create mode 100644 drivers/net/phy/can_phy_drv.c create mode 100644 include/linux/can/phy.h -- 2.28.0
