The patch titled
spi: core and gpio expanders use subsys_init
has been added to the -mm tree. Its filename is
spi-core-and-gpio-expanders-use-subsys_init.patch
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------------------------------------------------------
Subject: spi: core and gpio expanders use subsys_init
From: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
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 <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/gpio/max7301.c | 6 ++++--
drivers/gpio/mcp23s08.c | 5 ++++-
drivers/spi/spi.c | 2 +-
3 files changed, 9 insertions(+), 4 deletions(-)
diff -puN drivers/gpio/max7301.c~spi-core-and-gpio-expanders-use-subsys_init drivers/gpio/max7301.c
--- a/drivers/gpio/max7301.c~spi-core-and-gpio-expanders-use-subsys_init
+++ a/drivers/gpio/max7301.c
@@ -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");
diff -puN drivers/gpio/mcp23s08.c~spi-core-and-gpio-expanders-use-subsys_init drivers/gpio/mcp23s08.c
--- a/drivers/gpio/mcp23s08.c~spi-core-and-gpio-expanders-use-subsys_init
+++ a/drivers/gpio/mcp23s08.c
@@ -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)
{
diff -puN drivers/spi/spi.c~spi-core-and-gpio-expanders-use-subsys_init drivers/spi/spi.c
--- a/drivers/spi/spi.c~spi-core-and-gpio-expanders-use-subsys_init
+++ a/drivers/spi/spi.c
@@ -738,5 +738,5 @@ err0:
* driver registration) _could_ be dynamically linked (modular) ... costs
* include needing to have boardinfo data structures be much more public.
*/
-subsys_initcall(spi_init);
+postcore_initcall(spi_init);
_
Patches currently in -mm which might be from dbrownell@xxxxxxxxxxxxxxxxxxxxx are
rtc-fix-kernel-panic-on-second-use-of-sigio-nofitication.patch
orion_spi-fix-handling-of-default-transfer-speed.patch
git-arm.patch
git-avr32.patch
git-x86.patch
git-mtd.patch
acpi-cope-with-pnpacpi-tables-missing-an-rtc-entry.patch
spi-simplify-spi_write_then_read.patch
spi_s3c24xx-pin-configuration-updates.patch
pxa2xx_spi-minor-cleanup.patch
pxa2xx_spi-fix-chip_info-defaults-and-documentation.patch
orion_spi-handle-88f6183-erratum.patch
spi-core-and-gpio-expanders-use-subsys_init.patch
rtc-ds1307-alarm-support-for-ds1337-ds1339.patch
rtc-remove-some-nop-open-release-methods.patch
legacy-rtc-remove-needless-confusing-hpet_rtc_irq-option.patch
rtc-file-close-consistently-disables-repeating-irqs.patch
rtc-cmos-strongly-avoid-hpet-emulation.patch
rtc-cmos-export-second-nvram-bank.patch
make-gpiochip-label-const.patch
gpio-i2c-expanders-use-subsys_init.patch
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