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OMAP2+: clockdomain: Add per clkdm lock to prevent concurrent state programming

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Since the clkdm state programming is now done from within the hwmod
framework (which uses a per-hwmod lock) instead of the being done
from the clock framework (which used a global lock), there is now a
need to have per-clkdm locking to prevent races between different
hwmods/modules belonging to the same clock domain concurrently
programming the clkdm state.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Rajendra Nayak
2011-07-10 05:56:55 -06:00
committed by Paul Walmsley
parent b86cfb52a1
commit 555e74ea08
4 changed files with 50 additions and 18 deletions
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2
arch/arm/mach-omap2/clockdomain.h
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@ -17,6 +17,7 @@
#define __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H
#include <linux/init.h>
#include <linux/spinlock.h>
#include "powerdomain.h"
#include <plat/clock.h>
@ -128,6 +129,7 @@ struct clockdomain {
const struct omap_chip_id omap_chip;
atomic_t usecount;
struct list_head node;
spinlock_t lock;
};
/**