Currently qca8337 switch are widely used on ipq8064 based router. On these particular router it was notice a very unstable switch with port not link detected as link with unknown speed, port dropping randomly and general unreliability. Lots of testing and comparison between this dsa driver and the original qsdk driver showed lack of some additional delay and values. A main difference arised from the original driver and the dsa one. The original driver didn't use MASTER regs to read phy status and the dedicated mdio driver worked correctly. Now that the dsa driver actually use these regs, it was found that these special read/write operation required mutual exclusion to normal qca8k_read/write operation. The add of mutex for these operation fixed the random port dropping and now only the actual linked port randomly dropped. Adding additional delay for set_page operation and fixing a bug in the mdio dedicated driver fixed also this problem. The current driver requires also more time to apply vlan switch. All of these changes and tweak permit a now very stable and reliable dsa driver and 0 port dropping. This series is currently tested by at least 5 user with different routers and all reports positive results and no problems. Ansuel Smith (14): drivers: net: dsa: qca8k: handle error with set_page drivers: net: dsa: qca8k: tweak internal delay to oem spec drivers: net: mdio: mdio-ip8064: improve busy wait delay drivers: net: dsa: qca8k: apply suggested packet priority drivers: net: dsa: qca8k: add support for qca8327 switch devicetree: net: dsa: qca8k: Document new compatible qca8327 drivers: net: dsa: qca8k: limit priority tweak to qca8337 switch drivers: net: dsa: qca8k: add GLOBAL_FC settings needed for qca8327 drivers: net: dsa: qca8k: add support for switch rev drivers: net: dsa: qca8k: add support for specific QCA access function drivers: net: dsa: qca8k: apply switch revision fix drivers: net: dsa: qca8k: clear MASTER_EN after phy read/write drivers: net: dsa: qca8k: protect MASTER busy_wait with mdio mutex drivers: net: dsa: qca8k: enlarge mdio delay and timeout .../devicetree/bindings/net/dsa/qca8k.txt | 1 + drivers/net/dsa/qca8k.c | 256 ++++++++++++++++-- drivers/net/dsa/qca8k.h | 54 +++- drivers/net/mdio/mdio-ipq8064.c | 36 ++- 4 files changed, 304 insertions(+), 43 deletions(-) -- 2.30.2
