This changeset adds support for Analog Devices Industrial Ethernet PHYs. Particularly the PHYs this driver adds support for: * ADIN1200 - Robust, Industrial, Low Power 10/100 Ethernet PHY * ADIN1300 - Robust, Industrial, Low Latency 10/100/1000 Gigabit Ethernet PHY The 2 chips are register compatible with one another. The main difference being that ADIN1200 doesn't operate in gigabit mode. The chips can be operated by the Generic PHY driver as well via the standard IEEE PHY registers (0x0000 - 0x000F) which are supported by the kernel as well. This assumes that configuration of the PHY has been done completely in HW, according to spec, i.e. no extra SW configuration required. This changeset also implements the ability to configure the chips via SW registers. Datasheets: https://www.analog.com/media/en/technical-documentation/data-sheets/ADIN1300.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/ADIN1200.pdf Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> Alexandru Ardelean (13): net: phy: adin: add support for Analog Devices PHYs net: phy: adin: hook genphy_{suspend,resume} into the driver net: phy: adin: add support for interrupts net: phy: adin: add {write,read}_mmd hooks net: phy: adin: configure RGMII/RMII/MII modes on config net: phy: adin: make RGMII internal delays configurable net: phy: adin: make RMII fifo depth configurable net: phy: adin: add support MDI/MDIX/Auto-MDI selection net: phy: adin: add EEE translation layer from Clause 45 to Clause 22 net: phy: adin: implement PHY subsystem software reset net: phy: adin: implement downshift configuration via phy-tunable net: phy: adin: add ethtool get_stats support dt-bindings: net: add bindings for ADIN PHY driver .../devicetree/bindings/net/adi,adin.yaml | 73 ++ MAINTAINERS | 8 + drivers/net/phy/Kconfig | 9 + drivers/net/phy/Makefile | 1 + drivers/net/phy/adin.c | 724 ++++++++++++++++++ 5 files changed, 815 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/adi,adin.yaml create mode 100644 drivers/net/phy/adin.c -- Changelog v4 -> v5: * added Andrew's and Florian's `Reviewed-by` tags where the case * [PATCH 4 10/14] net: phy: adin: implement PHY subsystem software reset - simplified mechanism; doing a static `msleep(10)` after issuing a subsystem soft reset; the previous mechanism (with a busy-wait) was working because of fluke; the reset bit in GeSftRst is self-clearing; once read, it always reads back 0, so there is no way to determine if the PHY has actually reset, except to wait a fixed/pessimistic time; after that, if any PHY read/write op does not work, it can be assumed that the MDIO bus went into a bad state, so the PHY is unusable * dropped [PATCH 4 11/14] net: phy: adin: implement Energy Detect Powerdown mode - will re-spin with a phy-tuna proposal at later point in time; * [PATCH 4 12/14] net: phy: adin: implement downshift configuration via phy-tunable - found some bugs while re-testing i) bug1: changed: + if (cnt > 8) + return -E2BIG; to + if (cnt > 7) + return -E2BIG; my 3 bit-logic was not that great for max value ii) bug2: changed: + *data = enable & cnt ? cnt : DOWNSHIFT_DEV_DISABLE; to + *data = (enable && cnt) ? cnt : DOWNSHIFT_DEV_DISABLE; needed logical OR vs bit-wise 2.20.1
