This patch series adds the MDIO workaround for the errata i2329.
On certain TI SoC's CPSW and ICSS peripherals, there is a possibility that the MDIO interface returns corrupt data on MDIO reads or writes incorrect data on MDIO writes. There is also a possibility for the MDIO interface to become unavailable until the next peripheral reset.
The workaround is to configure the MDIO in manual mode and disable the MDIO state machine and emulate the MDIO protocol by reading and writing appropriate fields in MDIO_MANUAL_IF_REG register of the MDIO controller to manipulate the MDIO clock and data pins.
Ravi Gunasekaran (2): net: ti: cpsw-mdio: Add workaround for errata i2329 net: ti: am65-cpsw-nuss: Enable MDIO manual mode
drivers/net/ti/am65-cpsw-nuss.c | 24 ++- drivers/net/ti/cpsw.c | 3 +- drivers/net/ti/cpsw_mdio.c | 255 +++++++++++++++++++++++++++++++- drivers/net/ti/cpsw_mdio.h | 2 +- drivers/net/ti/keystone_net.c | 3 +- 5 files changed, 279 insertions(+), 8 deletions(-)