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85a7df1f85
Nobody is using this API upstream and it's just contributing cruft. Remove it so the MSM clock API is closer to the generic struct clock API. Acked-by: Saravana Kannan <skannan@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
177 lines
4.2 KiB
C
177 lines
4.2 KiB
C
/* arch/arm/mach-msm/clock.c
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*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/err.h>
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#include <linux/spinlock.h>
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#include <linux/pm_qos.h>
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#include <linux/mutex.h>
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#include <linux/clk.h>
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#include <linux/string.h>
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#include <linux/module.h>
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#include <linux/clkdev.h>
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#include "clock.h"
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static DEFINE_MUTEX(clocks_mutex);
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static DEFINE_SPINLOCK(clocks_lock);
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static LIST_HEAD(clocks);
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/*
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* Standard clock functions defined in include/linux/clk.h
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*/
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int clk_enable(struct clk *clk)
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{
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unsigned long flags;
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spin_lock_irqsave(&clocks_lock, flags);
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clk->count++;
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if (clk->count == 1)
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clk->ops->enable(clk->id);
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spin_unlock_irqrestore(&clocks_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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unsigned long flags;
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spin_lock_irqsave(&clocks_lock, flags);
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BUG_ON(clk->count == 0);
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clk->count--;
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if (clk->count == 0)
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clk->ops->disable(clk->id);
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spin_unlock_irqrestore(&clocks_lock, flags);
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}
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EXPORT_SYMBOL(clk_disable);
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int clk_reset(struct clk *clk, enum clk_reset_action action)
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{
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return clk->ops->reset(clk->remote_id, action);
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}
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EXPORT_SYMBOL(clk_reset);
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unsigned long clk_get_rate(struct clk *clk)
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{
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return clk->ops->get_rate(clk->id);
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}
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EXPORT_SYMBOL(clk_get_rate);
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int clk_set_rate(struct clk *clk, unsigned long rate)
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{
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int ret;
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if (clk->flags & CLKFLAG_MAX) {
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ret = clk->ops->set_max_rate(clk->id, rate);
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if (ret)
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return ret;
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}
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if (clk->flags & CLKFLAG_MIN) {
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ret = clk->ops->set_min_rate(clk->id, rate);
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if (ret)
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return ret;
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}
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if (clk->flags & CLKFLAG_MAX || clk->flags & CLKFLAG_MIN)
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return ret;
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return clk->ops->set_rate(clk->id, rate);
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}
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EXPORT_SYMBOL(clk_set_rate);
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long clk_round_rate(struct clk *clk, unsigned long rate)
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{
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return clk->ops->round_rate(clk->id, rate);
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}
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EXPORT_SYMBOL(clk_round_rate);
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int clk_set_min_rate(struct clk *clk, unsigned long rate)
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{
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return clk->ops->set_min_rate(clk->id, rate);
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}
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EXPORT_SYMBOL(clk_set_min_rate);
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int clk_set_max_rate(struct clk *clk, unsigned long rate)
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{
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return clk->ops->set_max_rate(clk->id, rate);
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}
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EXPORT_SYMBOL(clk_set_max_rate);
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int clk_set_parent(struct clk *clk, struct clk *parent)
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{
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return -ENOSYS;
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}
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EXPORT_SYMBOL(clk_set_parent);
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struct clk *clk_get_parent(struct clk *clk)
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{
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return ERR_PTR(-ENOSYS);
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}
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EXPORT_SYMBOL(clk_get_parent);
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/* EBI1 is the only shared clock that several clients want to vote on as of
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* this commit. If this changes in the future, then it might be better to
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* make clk_min_rate handle the voting or make ebi1_clk_set_min_rate more
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* generic to support different clocks.
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*/
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static struct clk *ebi1_clk;
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void __init msm_clock_init(struct clk_lookup *clock_tbl, unsigned num_clocks)
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{
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unsigned n;
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mutex_lock(&clocks_mutex);
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for (n = 0; n < num_clocks; n++) {
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clkdev_add(&clock_tbl[n]);
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list_add_tail(&clock_tbl[n].clk->list, &clocks);
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}
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mutex_unlock(&clocks_mutex);
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ebi1_clk = clk_get(NULL, "ebi1_clk");
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BUG_ON(ebi1_clk == NULL);
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}
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/* The bootloader and/or AMSS may have left various clocks enabled.
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* Disable any clocks that belong to us (CLKFLAG_AUTO_OFF) but have
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* not been explicitly enabled by a clk_enable() call.
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*/
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static int __init clock_late_init(void)
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{
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unsigned long flags;
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struct clk *clk;
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unsigned count = 0;
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clock_debug_init();
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mutex_lock(&clocks_mutex);
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list_for_each_entry(clk, &clocks, list) {
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clock_debug_add(clk);
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if (clk->flags & CLKFLAG_AUTO_OFF) {
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spin_lock_irqsave(&clocks_lock, flags);
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if (!clk->count) {
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count++;
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clk->ops->auto_off(clk->id);
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}
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spin_unlock_irqrestore(&clocks_lock, flags);
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}
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}
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mutex_unlock(&clocks_mutex);
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pr_info("clock_late_init() disabled %d unused clocks\n", count);
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return 0;
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}
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late_initcall(clock_late_init);
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