diff options
| author | David Brownell <david-b@pacbell.net> | 2006-04-03 15:49:04 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-05-16 14:33:57 -0700 |
| commit | a020ed7521a9737bcf3e34eb880867c60c3c68d0 (patch) | |
| tree | 52941e00b05df6c1bfe228fd193fdb09cf963d15 /include/linux/spi/spi.h | |
| parent | ccf77cc4af5b048e20cfd9327fcc286cb69c34cc (diff) | |
[PATCH] SPI: busnum == 0 needs to work
We need to be able to have a "SPI bus 0" matching chip numbering; but
that number was wrongly used to flag dynamic allocation of a bus number.
This patch resolves that issue; now negative numbers trigger dynamic alloc.
It also updates the how-to-write-a-controller-driver overview to mention
this stuff.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/spi/spi.h')
| -rw-r--r-- | include/linux/spi/spi.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 77add901691..e928c0dcc29 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -172,13 +172,13 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) struct spi_master { struct class_device cdev; - /* other than zero (== assign one dynamically), bus_num is fully + /* other than negative (== assign one dynamically), bus_num is fully * board-specific. usually that simplifies to being SOC-specific. - * example: one SOC has three SPI controllers, numbered 1..3, + * example: one SOC has three SPI controllers, numbered 0..2, * and one board's schematics might show it using SPI-2. software * would normally use bus_num=2 for that controller. */ - u16 bus_num; + s16 bus_num; /* chipselects will be integral to many controllers; some others * might use board-specific GPIOs. |