spi: davinci: simplify prescalar calculation

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Simplify pre-scalar calculation and move it into a seprate
function.

Refuse to correct invalid pre-scalar values silently as this
might lead to unexpected bugs and lower performance. Instead
an error will force users to dig into the root-cause of the
issue.

While at it, remove some device specific checks on the maximum
SPI frequency. As the driver supports the SPI interface
implemented on various devices, it should only take care of core
SPI limitations and leave the device specific handling to platform
code.

Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

...

This commit is contained in:

Brian Niebuhr 2010-08-13 13:27:23 +05:30 • committed by Sekhar Nori

parent 23853973d9

commit 7fe0092b1f

1 changed files with 31 additions and 22 deletions

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drivers/spi/davinci_spi.c

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