ARM: msm: Migrate to common clock framework

Move the existing clock code in mach-msm to the common clock
framework. We lose our capability to set the rate of and enable a
clock through debugfs. This is ok though because the debugfs
features are mainly used for testing and development of new clock
code.

To maintain compatibility with the original MSM clock code we
make a wrapper for clk_reset() that calls the struct msm_clk
specific reset function. This is necessary for the usb and sdcc
devices on MSM until a better suited API is made available.

Cc: Saravana Kannan <skannan@codeaurora.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>

1 files changed, 5 insertions, 141 deletions

diff --git a/arch/arm/mach-msm/clock.c b/arch/arm/mach-msm/clock.c
index d72dd3770298..35ea02b52483 100644
--- a/arch/arm/mach-msm/clock.c
+++ b/arch/arm/mach-msm/clock.c
@@ -1,7 +1,7 @@
 /* arch/arm/mach-msm/clock.c
  *
  * Copyright (C) 2007 Google, Inc.
- * Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved.
+ * Copyright (c) 2007-2012, The Linux Foundation. All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
@@ -14,151 +14,15 @@
  *
  */
 
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/err.h>
-#include <linux/spinlock.h>
-#include <linux/pm_qos.h>
-#include <linux/mutex.h>
-#include <linux/clk.h>
-#include <linux/string.h>
+#include <linux/clk-provider.h>
 #include <linux/module.h>
-#include <linux/clkdev.h>
 
 #include "clock.h"
 
-static DEFINE_MUTEX(clocks_mutex);
-static DEFINE_SPINLOCK(clocks_lock);
-static LIST_HEAD(clocks);
-
-/*
- * Standard clock functions defined in include/linux/clk.h
- */
-int clk_enable(struct clk *clk)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&clocks_lock, flags);
-	clk->count++;
-	if (clk->count == 1)
-		clk->ops->enable(clk->id);
-	spin_unlock_irqrestore(&clocks_lock, flags);
-	return 0;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&clocks_lock, flags);
-	BUG_ON(clk->count == 0);
-	clk->count--;
-	if (clk->count == 0)
-		clk->ops->disable(clk->id);
-	spin_unlock_irqrestore(&clocks_lock, flags);
-}
-EXPORT_SYMBOL(clk_disable);
-
 int clk_reset(struct clk *clk, enum clk_reset_action action)
 {
-	return clk->ops->reset(clk->remote_id, action);
+	struct clk_hw *hw = __clk_get_hw(clk);
+	struct msm_clk *m = to_msm_clk(hw);
+	return m->reset(hw, action);
 }
 EXPORT_SYMBOL(clk_reset);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
-	return clk->ops->get_rate(clk->id);
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
-	int ret;
-	if (clk->flags & CLKFLAG_MAX) {
-		ret = clk->ops->set_max_rate(clk->id, rate);
-		if (ret)
-			return ret;
-	}
-	if (clk->flags & CLKFLAG_MIN) {
-		ret = clk->ops->set_min_rate(clk->id, rate);
-		if (ret)
-			return ret;
-	}
-
-	if (clk->flags & CLKFLAG_MAX || clk->flags & CLKFLAG_MIN)
-		return ret;
-
-	return clk->ops->set_rate(clk->id, rate);
-}
-EXPORT_SYMBOL(clk_set_rate);
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
-	return clk->ops->round_rate(clk->id, rate);
-}
-EXPORT_SYMBOL(clk_round_rate);
-
-int clk_set_parent(struct clk *clk, struct clk *parent)
-{
-	return -ENOSYS;
-}
-EXPORT_SYMBOL(clk_set_parent);
-
-struct clk *clk_get_parent(struct clk *clk)
-{
-	return ERR_PTR(-ENOSYS);
-}
-EXPORT_SYMBOL(clk_get_parent);
-
-/* EBI1 is the only shared clock that several clients want to vote on as of
- * this commit. If this changes in the future, then it might be better to
- * make clk_min_rate handle the voting or make ebi1_clk_set_min_rate more
- * generic to support different clocks.
- */
-static struct clk *ebi1_clk;
-
-void msm_clock_init(struct clk_lookup *clock_tbl, size_t num_clocks)
-{
-	unsigned n;
-
-	mutex_lock(&clocks_mutex);
-	for (n = 0; n < num_clocks; n++) {
-		clkdev_add(&clock_tbl[n]);
-		list_add_tail(&clock_tbl[n].clk->list, &clocks);
-	}
-	mutex_unlock(&clocks_mutex);
-
-	ebi1_clk = clk_get(NULL, "ebi1_clk");
-	BUG_ON(ebi1_clk == NULL);
-
-}
-
-/* The bootloader and/or AMSS may have left various clocks enabled.
- * Disable any clocks that belong to us (CLKFLAG_AUTO_OFF) but have
- * not been explicitly enabled by a clk_enable() call.
- */
-static int __init clock_late_init(void)
-{
-	unsigned long flags;
-	struct clk *clk;
-	unsigned count = 0;
-
-	clock_debug_init();
-	mutex_lock(&clocks_mutex);
-	list_for_each_entry(clk, &clocks, list) {
-		clock_debug_add(clk);
-		if (clk->flags & CLKFLAG_AUTO_OFF) {
-			spin_lock_irqsave(&clocks_lock, flags);
-			if (!clk->count) {
-				count++;
-				clk->ops->auto_off(clk->id);
-			}
-			spin_unlock_irqrestore(&clocks_lock, flags);
-		}
-	}
-	mutex_unlock(&clocks_mutex);
-	pr_info("clock_late_init() disabled %d unused clocks\n", count);
-	return 0;
-}
-
-late_initcall(clock_late_init);
-