lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

spi: enable spi_board_info to be registered after spi_master

Browse Source 
Currently spi_register_board_info() has to be called before its related
spi_master be registered, otherwise these board info will be just ignored.

This patch will remove this order limit, it adds a global spi master list
like the existing global board info listr. Whenever a board info or a
spi_master is registered, the spi master list or board info list
will be scanned, and a new spi device will be created if there is a
master-board info match.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Feng Tang
2010-08-02 15:52:15 +08:00
committed by Grant Likely
parent d4429f608a
commit 2b9603a0d7
2 changed files with 50 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/spi/spi.h
View File

@ -204,6 +204,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
/**
* struct spi_master - interface to SPI master controller
* @dev: device interface to this driver
* @list: link with the global spi_master list
* @bus_num: board-specific (and often SOC-specific) identifier for a
* given SPI controller.
* @num_chipselect: chipselects are used to distinguish individual
@ -238,6 +239,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
struct spi_master {
struct device dev;
struct list_head list;
/* 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 0..2,