diff options
Diffstat (limited to 'arch/arm/mach-ns9xxx/clock.c')
| -rw-r--r-- | arch/arm/mach-ns9xxx/clock.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/arch/arm/mach-ns9xxx/clock.c b/arch/arm/mach-ns9xxx/clock.c deleted file mode 100644 index cf81cbc5754..00000000000 --- a/arch/arm/mach-ns9xxx/clock.c +++ /dev/null @@ -1,215 +0,0 @@ -/* - * arch/arm/mach-ns9xxx/clock.c - * - * Copyright (C) 2007 by Digi International Inc. - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - */ -#include <linux/err.h> -#include <linux/module.h> -#include <linux/list.h> -#include <linux/clk.h> -#include <linux/string.h> -#include <linux/platform_device.h> -#include <linux/semaphore.h> - -#include "clock.h" - -static LIST_HEAD(clocks); -static DEFINE_SPINLOCK(clk_lock); - -struct clk *clk_get(struct device *dev, const char *id) -{ - struct clk *p, *ret = NULL, *retgen = NULL; - unsigned long flags; - int idno; - - if (dev == NULL || dev->bus != &platform_bus_type) - idno = -1; - else - idno = to_platform_device(dev)->id; - - spin_lock_irqsave(&clk_lock, flags); - list_for_each_entry(p, &clocks, node) { - if (strcmp(id, p->name) == 0) { - if (p->id == idno) { - if (!try_module_get(p->owner)) - continue; - ret = p; - break; - } else if (p->id == -1) - /* remember match with id == -1 in case there is - * no clock for idno */ - retgen = p; - } - } - - if (!ret && retgen && try_module_get(retgen->owner)) - ret = retgen; - - if (ret) - ++ret->refcount; - - spin_unlock_irqrestore(&clk_lock, flags); - - return ret ? ret : ERR_PTR(-ENOENT); -} -EXPORT_SYMBOL(clk_get); - -void clk_put(struct clk *clk) -{ - module_put(clk->owner); - --clk->refcount; -} -EXPORT_SYMBOL(clk_put); - -static int clk_enable_unlocked(struct clk *clk) -{ - int ret = 0; - if (clk->parent) { - ret = clk_enable_unlocked(clk->parent); - if (ret) - return ret; - } - - if (clk->usage++ == 0 && clk->endisable) - ret = clk->endisable(clk, 1); - - return ret; -} - -int clk_enable(struct clk *clk) -{ - int ret; - unsigned long flags; - - spin_lock_irqsave(&clk_lock, flags); - - ret = clk_enable_unlocked(clk); - - spin_unlock_irqrestore(&clk_lock, flags); - - return ret; -} -EXPORT_SYMBOL(clk_enable); - -static void clk_disable_unlocked(struct clk *clk) -{ - if (--clk->usage == 0 && clk->endisable) - clk->endisable(clk, 0); - - if (clk->parent) - clk_disable_unlocked(clk->parent); -} - -void clk_disable(struct clk *clk) -{ - unsigned long flags; - - spin_lock_irqsave(&clk_lock, flags); - - clk_disable_unlocked(clk); - - spin_unlock_irqrestore(&clk_lock, flags); -} -EXPORT_SYMBOL(clk_disable); - -unsigned long clk_get_rate(struct clk *clk) -{ - if (clk->get_rate) - return clk->get_rate(clk); - - if (clk->rate) - return clk->rate; - - if (clk->parent) - return clk_get_rate(clk->parent); - - return 0; -} -EXPORT_SYMBOL(clk_get_rate); - -int clk_register(struct clk *clk) -{ - unsigned long flags; - - spin_lock_irqsave(&clk_lock, flags); - - list_add(&clk->node, &clocks); - - if (clk->parent) - ++clk->parent->refcount; - - spin_unlock_irqrestore(&clk_lock, flags); - - return 0; -} - -int clk_unregister(struct clk *clk) -{ - int ret = 0; - unsigned long flags; - - spin_lock_irqsave(&clk_lock, flags); - - if (clk->usage || clk->refcount) - ret = -EBUSY; - else - list_del(&clk->node); - - if (clk->parent) - --clk->parent->refcount; - - spin_unlock_irqrestore(&clk_lock, flags); - - return ret; -} - -#if defined CONFIG_DEBUG_FS - -#include <linux/debugfs.h> -#include <linux/seq_file.h> - -static int clk_debugfs_show(struct seq_file *s, void *null) -{ - unsigned long flags; - struct clk *p; - - spin_lock_irqsave(&clk_lock, flags); - - list_for_each_entry(p, &clocks, node) - seq_printf(s, "%s.%d: usage=%lu refcount=%lu rate=%lu\n", - p->name, p->id, p->usage, p->refcount, - p->usage ? clk_get_rate(p) : 0); - - spin_unlock_irqrestore(&clk_lock, flags); - - return 0; -} - -static int clk_debugfs_open(struct inode *inode, struct file *file) -{ - return single_open(file, clk_debugfs_show, NULL); -} - -static const struct file_operations clk_debugfs_operations = { - .open = clk_debugfs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init clk_debugfs_init(void) -{ - struct dentry *dentry; - - dentry = debugfs_create_file("clk", S_IFREG | S_IRUGO, NULL, NULL, - &clk_debugfs_operations); - return IS_ERR(dentry) ? PTR_ERR(dentry) : 0; -} -subsys_initcall(clk_debugfs_init); - -#endif /* if defined CONFIG_DEBUG_FS */ |