Hello,
this is v4 of series adding support for RollBall/Hilink SFP modules.
Checked with:
checkpatch.pl --max-line-length=80
Changes from v3:
- RollBall mdio-i2c driver now sets/restores SFP_PAGE for every MDIO
access.
I first wanted to achieve this operation (setting
SFP_PAGE/doing MDIO/restoring SFP_PAGE) via one call do i2c_transfer,
by constructing msgs array in such a way, but it turned out that this
doesn't work on RollBall SFPs, because changed SFP_PAGE takes into
account only after i2c_transfer ends.
So instead I use i2c_lock_bus/serveral __i2c_transfers/i2c_unlock_bus.
- I have removed the patch which changes MACTYPE in the marvell10g
driver, since Russell has in his net-queue a better solution. I still
think that my patch would have sufficed temporarily (and would not
cause regressions), but nobody wanted to review it. If you think that
I should sent this series again with that patch, please let me know.
Changes from v2:
- added comment into the patch adding support for RollBall I2C MDIO
protocol, saying that we expect the SFP_PAGE not to be changed by
the SFP code, as requested by Russell. If, in the future, SFP code
starts modifying SFP_PAGE, we will have to handle it in mdio-i2c
somehow
- destruction of I2C MDIO bus in patch 3/5 now depends on whether the
MDIO bus is not NULL, instead of whether PHY exists, as suggested by
Russell
- changed waiting time for RollBall module to initialize from 30 seconds
to 25 seconds. Testing shows that it is never longer than 21-22
seconds, so waiting 25 seconds instead of 30 is IMO safe enough
- added Russell's Reviewed-by tags where relevant
Changes from v1:
- wrapped to 80 columns as per Russell's request
- initialization of RollBall MDIO I2C protocol moved from sfp.c to
mdio-i2c.c as per Russell's request
- second patch removes the 802.3z check also from phylink_sfp_config
as suggested by Russell
- creation/destruction of mdiobus for SFP now occurs before probing
for PHY/after releasing PHY (as suggested by Russell)
- the last patch became a little simpler after the above was done
Cc: Andrew Lunn <and...@lunn.ch>
Cc: Russell King <rmk+ker...@armlinux.org.uk>
Marek Behún (4):
net: phy: mdio-i2c: support I2C MDIO protocol for RollBall SFP modules
net: phylink: allow attaching phy for SFP modules on 802.3z mode
net: sfp: create/destroy I2C mdiobus before PHY probe/after PHY
release
net: sfp: add support for multigig RollBall transceivers
drivers/net/mdio/mdio-i2c.c | 319 +++++++++++++++++++++++++++++++++-
drivers/net/phy/phylink.c | 5 +-
drivers/net/phy/sfp.c | 66 +++++--
include/linux/mdio/mdio-i2c.h | 8 +-
4 files changed, 378 insertions(+), 20 deletions(-)
base-commit: 73b7a6047971aa6ce4a70fc4901964d14f077171
--
2.26.2
