/* arch/arm/mach-msm/clock.c
*
* Copyright (C) 2007 Google, Inc.
- * Copyright (c) 2007 QUALCOMM Incorporated
+ * Copyright (c) 2007-2010, Code Aurora Forum. 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
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/ctype.h>
+#include <linux/pm_qos_params.h>
+#include <mach/clk.h>
#include "clock.h"
#include "proc_comm.h"
static DEFINE_MUTEX(clocks_mutex);
static DEFINE_SPINLOCK(clocks_lock);
static LIST_HEAD(clocks);
+struct clk *msm_clocks;
+unsigned msm_num_clocks;
/*
- * glue for the proc_comm interface
+ * Bitmap of enabled clocks, excluding ACPU which is always
+ * enabled
*/
-static inline int pc_clk_enable(unsigned id)
-{
- return msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL);
-}
-
-static inline void pc_clk_disable(unsigned id)
-{
- msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL);
-}
-
-static inline int pc_clk_set_rate(unsigned id, unsigned rate)
-{
- return msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate);
-}
-
-static inline int pc_clk_set_min_rate(unsigned id, unsigned rate)
-{
- return msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate);
-}
-
-static inline int pc_clk_set_max_rate(unsigned id, unsigned rate)
-{
- return msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate);
-}
-
-static inline int pc_clk_set_flags(unsigned id, unsigned flags)
-{
- return msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags);
-}
-
-static inline unsigned pc_clk_get_rate(unsigned id)
-{
- if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL))
- return 0;
- else
- return id;
-}
-
-static inline unsigned pc_clk_is_enabled(unsigned id)
-{
- if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL))
- return 0;
- else
- return id;
-}
-
-static inline int pc_pll_request(unsigned id, unsigned on)
-{
- on = !!on;
- return msm_proc_comm(PCOM_CLKCTL_RPC_PLL_REQUEST, &id, &on);
-}
+static DECLARE_BITMAP(clock_map_enabled, NR_CLKS);
+static DEFINE_SPINLOCK(clock_map_lock);
/*
* Standard clock functions defined in include/linux/clk.h
unsigned long flags;
spin_lock_irqsave(&clocks_lock, flags);
clk->count++;
- if (clk->count == 1)
- pc_clk_enable(clk->id);
+ if (clk->count == 1) {
+ clk->ops->enable(clk->id);
+ spin_lock(&clock_map_lock);
+ clock_map_enabled[BIT_WORD(clk->id)] |= BIT_MASK(clk->id);
+ spin_unlock(&clock_map_lock);
+ }
spin_unlock_irqrestore(&clocks_lock, flags);
return 0;
}
spin_lock_irqsave(&clocks_lock, flags);
BUG_ON(clk->count == 0);
clk->count--;
- if (clk->count == 0)
- pc_clk_disable(clk->id);
+ if (clk->count == 0) {
+ clk->ops->disable(clk->id);
+ spin_lock(&clock_map_lock);
+ clock_map_enabled[BIT_WORD(clk->id)] &= ~BIT_MASK(clk->id);
+ spin_unlock(&clock_map_lock);
+ }
spin_unlock_irqrestore(&clocks_lock, flags);
}
EXPORT_SYMBOL(clk_disable);
+int clk_reset(struct clk *clk, enum clk_reset_action action)
+{
+ if (!clk->ops->reset)
+ clk->ops->reset = &pc_clk_reset;
+ return clk->ops->reset(clk->remote_id, action);
+}
+EXPORT_SYMBOL(clk_reset);
+
unsigned long clk_get_rate(struct clk *clk)
{
- return pc_clk_get_rate(clk->id);
+ 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_USE_MIN_MAX_TO_SET) {
- ret = pc_clk_set_max_rate(clk->id, rate);
- if (ret)
- return ret;
- return pc_clk_set_min_rate(clk->id, rate);
- }
- return pc_clk_set_rate(clk->id, rate);
+ 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_min_rate(struct clk *clk, unsigned long rate)
+{
+ return clk->ops->set_min_rate(clk->id, rate);
+}
+EXPORT_SYMBOL(clk_set_min_rate);
+
+int clk_set_max_rate(struct clk *clk, unsigned long rate)
+{
+ return clk->ops->set_max_rate(clk->id, rate);
+}
+EXPORT_SYMBOL(clk_set_max_rate);
+
int clk_set_parent(struct clk *clk, struct clk *parent)
{
return -ENOSYS;
{
if (clk == NULL || IS_ERR(clk))
return -EINVAL;
- return pc_clk_set_flags(clk->id, flags);
+ return clk->ops->set_flags(clk->id, flags);
}
EXPORT_SYMBOL(clk_set_flags);
+/* 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 __init msm_clock_init(void)
+static void __init set_clock_ops(struct clk *clk)
+{
+ if (!clk->ops) {
+ clk->ops = &clk_ops_pcom;
+ clk->id = clk->remote_id;
+ }
+}
+
+void __init msm_clock_init(struct clk *clock_tbl, unsigned num_clocks)
{
unsigned n;
spin_lock_init(&clocks_lock);
mutex_lock(&clocks_mutex);
- for (n = 0; n < msm_num_clocks; n++)
+ msm_clocks = clock_tbl;
+ msm_num_clocks = num_clocks;
+ for (n = 0; n < msm_num_clocks; n++) {
+ set_clock_ops(&msm_clocks[n]);
list_add_tail(&msm_clocks[n].list, &clocks);
+ }
mutex_unlock(&clocks_mutex);
+
+ ebi1_clk = clk_get(NULL, "ebi1_clk");
+ BUG_ON(ebi1_clk == NULL);
+
+}
+
+#if defined(CONFIG_DEBUG_FS)
+static struct clk *msm_clock_get_nth(unsigned index)
+{
+ if (index < msm_num_clocks)
+ return msm_clocks + index;
+ else
+ return 0;
+}
+
+static int clock_debug_rate_set(void *data, u64 val)
+{
+ struct clk *clock = data;
+ int ret;
+
+ /* Only increases to max rate will succeed, but that's actually good
+ * for debugging purposes. So we don't check for error. */
+ if (clock->flags & CLK_MAX)
+ clk_set_max_rate(clock, val);
+ if (clock->flags & CLK_MIN)
+ ret = clk_set_min_rate(clock, val);
+ else
+ ret = clk_set_rate(clock, val);
+ if (ret != 0)
+ printk(KERN_ERR "clk_set%s_rate failed (%d)\n",
+ (clock->flags & CLK_MIN) ? "_min" : "", ret);
+ return ret;
+}
+
+static int clock_debug_rate_get(void *data, u64 *val)
+{
+ struct clk *clock = data;
+ *val = clk_get_rate(clock);
+ return 0;
+}
+
+static int clock_debug_enable_set(void *data, u64 val)
+{
+ struct clk *clock = data;
+ int rc = 0;
+
+ if (val)
+ rc = clock->ops->enable(clock->id);
+ else
+ clock->ops->disable(clock->id);
+
+ return rc;
}
+static int clock_debug_enable_get(void *data, u64 *val)
+{
+ struct clk *clock = data;
+
+ *val = clock->ops->is_enabled(clock->id);
+
+ return 0;
+}
+
+static int clock_debug_local_get(void *data, u64 *val)
+{
+ struct clk *clock = data;
+
+ *val = clock->ops != &clk_ops_pcom;
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(clock_rate_fops, clock_debug_rate_get,
+ clock_debug_rate_set, "%llu\n");
+DEFINE_SIMPLE_ATTRIBUTE(clock_enable_fops, clock_debug_enable_get,
+ clock_debug_enable_set, "%llu\n");
+DEFINE_SIMPLE_ATTRIBUTE(clock_local_fops, clock_debug_local_get,
+ NULL, "%llu\n");
+
+static int __init clock_debug_init(void)
+{
+ struct dentry *dent_rate, *dent_enable, *dent_local;
+ struct clk *clock;
+ unsigned n = 0;
+ char temp[50], *ptr;
+
+ dent_rate = debugfs_create_dir("clk_rate", 0);
+ if (IS_ERR(dent_rate))
+ return PTR_ERR(dent_rate);
+
+ dent_enable = debugfs_create_dir("clk_enable", 0);
+ if (IS_ERR(dent_enable))
+ return PTR_ERR(dent_enable);
+
+ dent_local = debugfs_create_dir("clk_local", NULL);
+ if (IS_ERR(dent_local))
+ return PTR_ERR(dent_local);
+
+ while ((clock = msm_clock_get_nth(n++)) != 0) {
+ strncpy(temp, clock->dbg_name, ARRAY_SIZE(temp)-1);
+ for (ptr = temp; *ptr; ptr++)
+ *ptr = tolower(*ptr);
+ debugfs_create_file(temp, 0644, dent_rate,
+ clock, &clock_rate_fops);
+ debugfs_create_file(temp, 0644, dent_enable,
+ clock, &clock_enable_fops);
+ debugfs_create_file(temp, S_IRUGO, dent_local,
+ clock, &clock_local_fops);
+ }
+ return 0;
+}
+
+device_initcall(clock_debug_init);
+#endif
+
/* 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.
spin_lock_irqsave(&clocks_lock, flags);
if (!clk->count) {
count++;
- pc_clk_disable(clk->id);
+ clk->ops->auto_off(clk->id);
}
spin_unlock_irqrestore(&clocks_lock, flags);
}
}
late_initcall(clock_late_init);
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff