path: root/include/linux/spi/spi.h
diff options
authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-09-22 16:46:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 07:39:43 -0700
commit75368bf6c2876d8f33abfe77aa3864869a3893eb (patch)
tree97a543508a8aeb45646d059f8cdd561ae0a76ef2 /include/linux/spi/spi.h
parentb5f3294f0be5496aec01e5aa709a5fab8bb2f225 (diff)
spi: add support for device table matching
With this patch spi drivers can use standard spi_driver.id_table and MODULE_DEVICE_TABLE() mechanisms to bind against the devices. Just like we do with I2C drivers. This is useful when a single driver supports several variants of devices but it is not possible to detect them in run-time (like non-JEDEC chips probing in drivers/mtd/devices/m25p80.c), and when platform_data usage is overkill. This patch also makes life a lot easier on OpenFirmware platforms, since with OF we extensively use proper device IDs in modaliases. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Jean Delvare <khali@linux-fr.org> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/spi/spi.h')
1 files changed, 8 insertions, 2 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index eb25cedb995b..e2051f39f6a8 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -20,6 +20,7 @@
#define __LINUX_SPI_H
#include <linux/device.h>
+#include <linux/mod_devicetable.h>
* INTERFACES between SPI master-side drivers and SPI infrastructure.
@@ -86,7 +87,7 @@ struct spi_device {
int irq;
void *controller_state;
void *controller_data;
- char modalias[32];
+ char modalias[SPI_NAME_SIZE];
* likely need more hooks for more protocol options affecting how
@@ -145,6 +146,7 @@ struct spi_message;
* struct spi_driver - Host side "protocol" driver
+ * @id_table: List of SPI devices supported by this driver
* @probe: Binds this driver to the spi device. Drivers can verify
* that the device is actually present, and may need to configure
* characteristics (such as bits_per_word) which weren't needed for
@@ -170,6 +172,7 @@ struct spi_message;
* MMC, RTC, filesystem character device nodes, and hardware monitoring.
struct spi_driver {
+ const struct spi_device_id *id_table;
int (*probe)(struct spi_device *spi);
int (*remove)(struct spi_device *spi);
void (*shutdown)(struct spi_device *spi);
@@ -734,7 +737,7 @@ struct spi_board_info {
* controller_data goes to spi_device.controller_data,
* irq is copied too
- char modalias[32];
+ char modalias[SPI_NAME_SIZE];
const void *platform_data;
void *controller_data;
int irq;
@@ -802,4 +805,7 @@ spi_unregister_device(struct spi_device *spi)
+extern const struct spi_device_id *
+spi_get_device_id(const struct spi_device *sdev);
#endif /* __LINUX_SPI_H */