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ssb: Make the GPIO API reentrancy safe

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This fixes the GPIO API to be reentrancy safe.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch
2008-02-19 16:22:50 +01:00
committed by John W. Linville
parent c2bcbe65fc
commit 53521d8c90
6 changed files with 122 additions and 11 deletions
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5
include/linux/ssb/ssb.h
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@@ -283,6 +283,11 @@ struct ssb_bus {
/* Contents of the SPROM. */
struct ssb_sprom sprom;
#ifdef CONFIG_SSB_EMBEDDED
/* Lock for GPIO register access. */
spinlock_t gpio_lock;
#endif /* EMBEDDED */
/* Internal-only stuff follows. Do not touch. */
struct list_head list;
#ifdef CONFIG_SSB_DEBUG

8
include/linux/ssb/ssb_embedded.h
View File

@@ -7,4 +7,12 @@
extern int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks);
/* Generic GPIO API */
u32 ssb_gpio_in(struct ssb_bus *bus, u32 mask);
u32 ssb_gpio_out(struct ssb_bus *bus, u32 mask, u32 value);
u32 ssb_gpio_outen(struct ssb_bus *bus, u32 mask, u32 value);
u32 ssb_gpio_control(struct ssb_bus *bus, u32 mask, u32 value);
u32 ssb_gpio_intmask(struct ssb_bus *bus, u32 mask, u32 value);
u32 ssb_gpio_polarity(struct ssb_bus *bus, u32 mask, u32 value);
#endif /* LINUX_SSB_EMBEDDED_H_ */