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authorHauke Mehrtens <hauke@hauke-m.de>2012-11-21 02:24:32 +0400
committerJohn Crispin <blogic@openwrt.org>2012-11-22 00:55:52 +0400
commit394bc7e38be79987ed15de203920c3cddb724cc1 (patch)
tree64cb52592aab0fb2f392560fb99d8d61caa81f4a /include/linux/ssb
parentda22f22e91f0d14d996c7258101575a5a06ddf85 (diff)
downloadlinux-394bc7e38be79987ed15de203920c3cddb724cc1.tar.xz
ssb: add locking around gpio register accesses
The GPIOs are access through some registers in the chip common core or over extif. We need locking around these GPIO accesses, all GPIOs are accessed through the same registers and parallel writes will cause problems. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Patchwork: http://patchwork.linux-mips.org/patch/4590 Acked-by: Florian Fainelli <florian@openwrt.org>
Diffstat (limited to 'include/linux/ssb')
-rw-r--r--include/linux/ssb/ssb_driver_chipcommon.h1
-rw-r--r--include/linux/ssb/ssb_driver_extif.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ssb/ssb_driver_chipcommon.h b/include/linux/ssb/ssb_driver_chipcommon.h
index c8d07c95d76e..30b694345d47 100644
--- a/include/linux/ssb/ssb_driver_chipcommon.h
+++ b/include/linux/ssb/ssb_driver_chipcommon.h
@@ -590,6 +590,7 @@ struct ssb_chipcommon {
u32 status;
/* Fast Powerup Delay constant */
u16 fast_pwrup_delay;
+ spinlock_t gpio_lock;
struct ssb_chipcommon_pmu pmu;
};
diff --git a/include/linux/ssb/ssb_driver_extif.h b/include/linux/ssb/ssb_driver_extif.h
index 91161f0aa22b..bd2306854a91 100644
--- a/include/linux/ssb/ssb_driver_extif.h
+++ b/include/linux/ssb/ssb_driver_extif.h
@@ -158,6 +158,7 @@
struct ssb_extif {
struct ssb_device *dev;
+ spinlock_t gpio_lock;
};
static inline bool ssb_extif_available(struct ssb_extif *extif)