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authorGrant Likely <grant.likely@secretlab.ca>2008-01-25 08:25:31 +0300
committerGrant Likely <grant.likely@secretlab.ca>2008-01-27 01:32:19 +0300
commit4fb4c5582475452d3bf7c5072ef2d15ee06f7723 (patch)
tree9e75d2795deafb6601fb31c858874ebd554a4135 /lib/bug.c
parentc8004a28186110657aa3e75135a6b96ebfa3e8f0 (diff)
downloadlinux-4fb4c5582475452d3bf7c5072ef2d15ee06f7723.tar.xz
[POWERPC] mpc52xx_psc_spi device driver must not touch port_config and cdm
It is dangerous for an mpc52xx device driver to modify the port_config register. If the driver is probed incorrectly, it will change the pin IO configuration in ways which may not be compatible with the board. port_config should be set up by the bootloader, or failing that, in the platform setup code in arch/powerpc/platforms/52xx. Also, modifying CDM registers directly can cause a race condition with other drivers. Instead call a common routine to modify CDM settings. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Dragos Carp <dragos.carp@toptica.com>
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