aboutsummaryrefslogtreecommitdiff
path: root/drivers/mfd
diff options
context:
space:
mode:
authorAndrea Paterniani <a.paterniani@swapp-eng.it>2008-04-28 02:14:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:31 -0700
commit5d9f3f6b7c4c9fe1706006f24f964e7c0fa49fb7 (patch)
treed0cd42d5c5acbfa99f5f100d563a04d5a065a361 /drivers/mfd
parent06719814780da741e7acf587367a86c3965c03a2 (diff)
spi: spi_imx updates
Updates to the i.MX SPI controller driver: 1) Some comments changed and/or added. 2) End of transfers is now managed on TXFIFO empty interrupt after the last write to TXFIFO. This speeds interrupt execution by removing the wait for TXFIFO to become empty. On TXFIFO empty interrupt the handler needs only to poll for the end of the ongoing transaction (SPI_CONTROL_XCH) to close the transfer. (2.1) Write only transfers are closed flushing RXFIFO. (2.2) Read transfers are closed reading trailing bytes from RXFIFO. (2.3) Read transfers where RXFIFO overrun occurred are closed by flushing RXFIFO and aborting the message. 3) Fifos are now flushed via SPI disable after the end of ongoing transaction. Signed-off-by: Andrea Paterniani <a.paterniani@swapp-eng.it> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mfd')
0 files changed, 0 insertions, 0 deletions