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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-17 22:28:15 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-17 22:28:15 -0400
commit0df0914d414a504b975f3cc66ace0c16ef55b7f3 (patch)
treec97ffa357943a8b226cdec1b9632c4cede813205 /drivers/hwspinlock/hwspinlock_internal.h
parent6899608533410557e6698cb9d4ff6df553916e98 (diff)
parent05f689400ea5fa3d71af82f910c8b140f87ad1f3 (diff)
Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (258 commits) omap: zoom: host should not pull up wl1271's irq line arm: plat-omap: iommu: fix request_mem_region() error path OMAP2+: Common CPU DIE ID reading code reads wrong registers for OMAP4430 omap4: mux: Remove duplicate mux modes omap: iovmm: don't check 'da' to set IOVMF_DA_FIXED flag omap: iovmm: disallow mapping NULL address when IOVMF_DA_ANON is set omap2+: mux: Fix compile when CONFIG_OMAP_MUX is not selected omap4: board-omap4panda: Initialise the serial pads omap3: board-3430sdp: Initialise the serial pads omap4: board-4430sdp: Initialise the serial pads omap2+: mux: Add macro for configuring static with omap_hwmod_mux_init omap2+: mux: Remove the use of IDLE flag omap2+: Add separate list for dynamic pads to mux perf: add OMAP support for the new power events OMAP4: Add IVA OPP enteries. OMAP4: Update Voltage Rail Values for MPU, IVA and CORE OMAP4: Enable 800 MHz and 1 GHz MPU-OPP OMAP3+: OPP: Replace voltage values with Macros OMAP3: wdtimer: Fix CORE idle transition Watchdog: omap_wdt: add fine grain runtime-pm ... Fix up various conflicts in - arch/arm/mach-omap2/board-omap3evm.c - arch/arm/mach-omap2/clock3xxx_data.c - arch/arm/mach-omap2/usb-musb.c - arch/arm/plat-omap/include/plat/usb.h - drivers/usb/musb/musb_core.h
Diffstat (limited to 'drivers/hwspinlock/hwspinlock_internal.h')
-rw-r--r--drivers/hwspinlock/hwspinlock_internal.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/hwspinlock/hwspinlock_internal.h b/drivers/hwspinlock/hwspinlock_internal.h
new file mode 100644
index 000000000000..69935e6b93e5
--- /dev/null
+++ b/drivers/hwspinlock/hwspinlock_internal.h
@@ -0,0 +1,61 @@
1/*
2 * Hardware spinlocks internal header
3 *
4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
5 *
6 * Contact: Ohad Ben-Cohen <ohad@wizery.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#ifndef __HWSPINLOCK_HWSPINLOCK_H
19#define __HWSPINLOCK_HWSPINLOCK_H
20
21#include <linux/spinlock.h>
22#include <linux/device.h>
23
24/**
25 * struct hwspinlock_ops - platform-specific hwspinlock handlers
26 *
27 * @trylock: make a single attempt to take the lock. returns 0 on
28 * failure and true on success. may _not_ sleep.
29 * @unlock: release the lock. always succeed. may _not_ sleep.
30 * @relax: optional, platform-specific relax handler, called by hwspinlock
31 * core while spinning on a lock, between two successive
32 * invocations of @trylock. may _not_ sleep.
33 */
34struct hwspinlock_ops {
35 int (*trylock)(struct hwspinlock *lock);
36 void (*unlock)(struct hwspinlock *lock);
37 void (*relax)(struct hwspinlock *lock);
38};
39
40/**
41 * struct hwspinlock - this struct represents a single hwspinlock instance
42 *
43 * @dev: underlying device, will be used to invoke runtime PM api
44 * @ops: platform-specific hwspinlock handlers
45 * @id: a global, unique, system-wide, index of the lock.
46 * @lock: initialized and used by hwspinlock core
47 * @owner: underlying implementation module, used to maintain module ref count
48 *
49 * Note: currently simplicity was opted for, but later we can squeeze some
50 * memory bytes by grouping the dev, ops and owner members in a single
51 * per-platform struct, and have all hwspinlocks point at it.
52 */
53struct hwspinlock {
54 struct device *dev;
55 const struct hwspinlock_ops *ops;
56 int id;
57 spinlock_t lock;
58 struct module *owner;
59};
60
61#endif /* __HWSPINLOCK_HWSPINLOCK_H */