Hi Grant,
I've pushed out Ernst's spi bus locking API patches to the following
branch. Before I push them into linux-next, I'd like to get some
testing. Can I have some volunteers please to pull this branch and
give it a spin? Bonus points for people who have mmc cards
multiplexed with other devices on their SPI bus.
Thanks for bringing up this topic.
We are working with these two patches (except the
spin_lock_irqsave modification and the 'bool' datatype
for bus_lock_flag) for several months on our system
(powerpc, MPC8314, kernel 2.6.32.7 and 2.6.32.14)
that makes heavy use of several SPI devices: 9 x EEPROM,
3 x dataflash, MMC and 2 x MDIO-pseudo-SPI (with a special
SPI-to-MDIO bus driver).
The MMC is used rarely, but the rest is essential for
system operation. Until now, we observed no problems,
even when copying EEPROM data to MMC. So you may add
my 'tested-by'.
Best regards
Ernst
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