From dccd573bb02aa011a4a7146c02c409ac0bd722a0 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Tue, 17 Jul 2007 04:04:02 -0700 Subject: SPI controller drivers: check for unsupported modes Minor SPI controller driver updates: make the setup() methods reject spi->mode bits they don't support, by masking aginst the inverse of bits they *do* support. This insures against misbehavior later when new mode bits get added. Most controllers can't support SPI_LSB_FIRST; more handle SPI_CS_HIGH. Support for all four SPI clock/transfer modes is routine. Signed-off-by: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/spi/atmel_spi.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/spi/atmel_spi.c') diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index 8b2601de363..7524a84bdd5 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -350,6 +350,7 @@ atmel_spi_interrupt(int irq, void *dev_id) return ret; } +/* the spi->mode bits understood by this driver: */ #define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH) static int atmel_spi_setup(struct spi_device *spi) -- cgit v1.2.3