A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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spi: core and gpio expanders use subsys_init

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Make the SPI external GPIO expander drivers register themselves at
subsys_initcall() time when they're statically linked, and make the SPI
core do its driver model initialization earlier so that's safe.

SOC-integrated GPIOs are available starting very early -- often before
initcalls start to run, or earily in arch_initcall() at latest -- so this
improves consistency, letting more subsystems rely on GPIOs being usable
by their own subsys_initcall() code.

Signed-off-by: David Brownell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Brownell 2008-10-15 22:02:46 -07:00 • committed by Linus Torvalds
commit 673c0c0038
3 changed files with 9 additions and 4 deletions
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6
drivers/gpio/max7301.c
View file

@ -325,13 +325,15 @@ static int __init max7301_init(void)
{
return spi_register_driver(&max7301_driver);
}
/* register after spi postcore initcall and before
* subsys initcalls that may rely on these GPIOs
*/
subsys_initcall(max7301_init);
static void __exit max7301_exit(void)
{
spi_unregister_driver(&max7301_driver);
}
module_init(max7301_init);
module_exit(max7301_exit);
MODULE_AUTHOR("Juergen Beisert");

5
drivers/gpio/mcp23s08.c
View file

@ -419,7 +419,10 @@ static int __init mcp23s08_init(void)
{
return spi_register_driver(&mcp23s08_driver);
}
module_init(mcp23s08_init);
/* register after spi postcore initcall and before
* subsys initcalls that may rely on these GPIOs
*/
subsys_initcall(mcp23s08_init);
static void __exit mcp23s08_exit(void)
{