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David Brownell defbd3b4bb atmel_spi: don't always deselect chip between messages

Update chipselect handling for atmel_spi:

  * Teach it how to leave chipselect active between messages; this
    helps various drivers work better.

  * Cope with at91rm0200 errata:  nCS0 can't be managed with GPIOs.
    The MR.PCS value is now updated whenever a chipselect changes.
    (This requires SPI pinmux init for that controller to change,
    and also testing on rm9200; doesn't break at91sam9 or avr32.)

  * Fix minor glitches:  spi_setup() must leave chipselects inactive,
    as must removal of the spi_device.

Also tweak diagnostic messaging to be a bit more useful.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2007-07-17 10:23:05 -07:00

at25.c

sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes

2007-07-11 16:09:09 -07:00

atmel_spi.c

atmel_spi: don't always deselect chip between messages

2007-07-17 10:23:05 -07:00

atmel_spi.h

[PATCH] SPI: atmel_spi driver

2007-02-14 08:09:53 -08:00

au1550_spi.c

SPI controller drivers: check for unsupported modes