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authorJ. Bruce Fields <bfields@citi.umich.edu>2009-08-21 11:27:29 -0400
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-08-21 11:27:29 -0400
commite9dc122166b8d863d3057a66ada04838e5548e52 (patch)
tree749e15bf719b64bf9113db7acd8e043d9742cb26 /drivers/spi/spidev.c
parent560ab42ef923aaf2e4347315bdfcc74b2708972c (diff)
parent405d8f8b1d936414da2093d4149ff790ff3f84a5 (diff)
downloadop-kernel-dev-e9dc122166b8d863d3057a66ada04838e5548e52.zip
op-kernel-dev-e9dc122166b8d863d3057a66ada04838e5548e52.tar.gz
Merge branch 'nfs-for-2.6.32' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 into for-2.6.32-incoming
Conflicts: net/sunrpc/cache.c
Diffstat (limited to 'drivers/spi/spidev.c')
-rw-r--r--drivers/spi/spidev.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 5d869c4..606e7a4 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -58,15 +58,20 @@ static unsigned long minors[N_SPI_MINORS / BITS_PER_LONG];
/* Bit masks for spi_device.mode management. Note that incorrect
- * settings for CS_HIGH and 3WIRE can cause *lots* of trouble for other
- * devices on a shared bus: CS_HIGH, because this device will be
- * active when it shouldn't be; 3WIRE, because when active it won't
- * behave as it should.
+ * settings for some settings can cause *lots* of trouble for other
+ * devices on a shared bus:
*
- * REVISIT should changing those two modes be privileged?
+ * - CS_HIGH ... this device will be active when it shouldn't be
+ * - 3WIRE ... when active, it won't behave as it should
+ * - NO_CS ... there will be no explicit message boundaries; this
+ * is completely incompatible with the shared bus model
+ * - READY ... transfers may proceed when they shouldn't.
+ *
+ * REVISIT should changing those flags be privileged?
*/
#define SPI_MODE_MASK (SPI_CPHA | SPI_CPOL | SPI_CS_HIGH \
- | SPI_LSB_FIRST | SPI_3WIRE | SPI_LOOP)
+ | SPI_LSB_FIRST | SPI_3WIRE | SPI_LOOP \
+ | SPI_NO_CS | SPI_READY)
struct spidev_data {
dev_t devt;
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