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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 17:48:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 17:48:14 -0700
commit2ca7d674d7ab2220707b2ada0b690c0e7c95e7ac (patch)
tree9c0927ed1d540e5fd704c1f82689870786514655 /arch/arm/plat-mxc/clock.c
parent2195d2818c37bdf263865f1e9effccdd9fc5f9d4 (diff)
parent87d721ad7a37b7650dd710c88dd5c6a5bf9fe996 (diff)
downloadop-kernel-dev-2ca7d674d7ab2220707b2ada0b690c0e7c95e7ac.zip
op-kernel-dev-2ca7d674d7ab2220707b2ada0b690c0e7c95e7ac.tar.gz
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (257 commits) [ARM] Update mach-types ARM: 5636/1: Move vendor enum to AMBA include ARM: Fix pfn_valid() for sparse memory [ARM] orion5x: Add LaCie NAS 2Big Network support [ARM] pxa/sharpsl_pm: zaurus c3000 aka spitz: fix resume ARM: 5686/1: at91: Correct AC97 reset line in at91sam9263ek board ARM: 5640/1: This patch modifies the support of AC97 on the at91sam9263 ek board ARM: 5689/1: Update default config of HP Jornada 700-series machines ARM: 5691/1: fix cache aliasing issues between kmap() and kmap_atomic() with highmem ARM: 5688/1: ks8695_serial: disable_irq() lockup ARM: 5687/1: fix an oops with highmem ARM: 5684/1: Add nuc960 platform to w90x900 ARM: 5683/1: Add nuc950 platform to w90x900 ARM: 5682/1: Add cpu.c and dev.c and modify some files of w90p910 platform ARM: 5626/1: add suspend/resume functions to amba-pl011 serial driver ARM: 5625/1: fix hard coded 4K resource size in amba bus detection MMC: MMCI: convert realview MMC to use gpiolib ARM: 5685/1: Make MMCI driver compile without gpiolib ARM: implement highpte ARM: Show FIQ in /proc/interrupts on CONFIG_FIQ ... Fix up trivial conflict in arch/arm/kernel/signal.c. It was due to the TIF_NOTIFY_RESUME addition in commit d0420c83f ("KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures") and follow-ups.
Diffstat (limited to 'arch/arm/plat-mxc/clock.c')
-rw-r--r--arch/arm/plat-mxc/clock.c170
1 files changed, 9 insertions, 161 deletions
diff --git a/arch/arm/plat-mxc/clock.c b/arch/arm/plat-mxc/clock.c
index 92e1356..9e8fbd5 100644
--- a/arch/arm/plat-mxc/clock.c
+++ b/arch/arm/plat-mxc/clock.c
@@ -39,6 +39,7 @@
#include <linux/string.h>
#include <mach/clock.h>
+#include <mach/hardware.h>
static LIST_HEAD(clocks);
static DEFINE_MUTEX(clocks_mutex);
@@ -47,76 +48,6 @@ static DEFINE_MUTEX(clocks_mutex);
* Standard clock functions defined in include/linux/clk.h
*-------------------------------------------------------------------------*/
-/*
- * All the code inside #ifndef CONFIG_COMMON_CLKDEV can be removed once all
- * MXC architectures have switched to using clkdev.
- */
-#ifndef CONFIG_COMMON_CLKDEV
-/*
- * Retrieve a clock by name.
- *
- * Note that we first try to use device id on the bus
- * and clock name. If this fails, we try to use "<name>.<id>". If this fails,
- * we try to use clock name only.
- * The reference count to the clock's module owner ref count is incremented.
- */
-struct clk *clk_get(struct device *dev, const char *id)
-{
- struct clk *p, *clk = ERR_PTR(-ENOENT);
- int idno;
- const char *str;
-
- if (id == NULL)
- return clk;
-
- if (dev == NULL || dev->bus != &platform_bus_type)
- idno = -1;
- else
- idno = to_platform_device(dev)->id;
-
- mutex_lock(&clocks_mutex);
-
- list_for_each_entry(p, &clocks, node) {
- if (p->id == idno &&
- strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
- clk = p;
- goto found;
- }
- }
-
- str = strrchr(id, '.');
- if (str) {
- int cnt = str - id;
- str++;
- idno = simple_strtol(str, NULL, 10);
- list_for_each_entry(p, &clocks, node) {
- if (p->id == idno &&
- strlen(p->name) == cnt &&
- strncmp(id, p->name, cnt) == 0 &&
- try_module_get(p->owner)) {
- clk = p;
- goto found;
- }
- }
- }
-
- list_for_each_entry(p, &clocks, node) {
- if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
- clk = p;
- goto found;
- }
- }
-
- printk(KERN_WARNING "clk: Unable to get requested clock: %s\n", id);
-
-found:
- mutex_unlock(&clocks_mutex);
-
- return clk;
-}
-EXPORT_SYMBOL(clk_get);
-#endif
-
static void __clk_disable(struct clk *clk)
{
if (clk == NULL || IS_ERR(clk))
@@ -193,16 +124,6 @@ unsigned long clk_get_rate(struct clk *clk)
}
EXPORT_SYMBOL(clk_get_rate);
-#ifndef CONFIG_COMMON_CLKDEV
-/* Decrement the clock's module reference count */
-void clk_put(struct clk *clk)
-{
- if (clk && !IS_ERR(clk))
- module_put(clk->owner);
-}
-EXPORT_SYMBOL(clk_put);
-#endif
-
/* Round the requested clock rate to the nearest supported
* rate that is less than or equal to the requested rate.
* This is dependent on the clock's current parent.
@@ -265,80 +186,6 @@ struct clk *clk_get_parent(struct clk *clk)
}
EXPORT_SYMBOL(clk_get_parent);
-#ifndef CONFIG_COMMON_CLKDEV
-/*
- * Add a new clock to the clock tree.
- */
-int clk_register(struct clk *clk)
-{
- if (clk == NULL || IS_ERR(clk))
- return -EINVAL;
-
- mutex_lock(&clocks_mutex);
- list_add(&clk->node, &clocks);
- mutex_unlock(&clocks_mutex);
-
- return 0;
-}
-EXPORT_SYMBOL(clk_register);
-
-/* Remove a clock from the clock tree */
-void clk_unregister(struct clk *clk)
-{
- if (clk == NULL || IS_ERR(clk))
- return;
-
- mutex_lock(&clocks_mutex);
- list_del(&clk->node);
- mutex_unlock(&clocks_mutex);
-}
-EXPORT_SYMBOL(clk_unregister);
-
-#ifdef CONFIG_PROC_FS
-static int mxc_clock_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- struct clk *clkp;
- char *p = page;
- int len;
-
- list_for_each_entry(clkp, &clocks, node) {
- p += sprintf(p, "%s-%d:\t\t%lu, %d", clkp->name, clkp->id,
- clk_get_rate(clkp), clkp->usecount);
- if (clkp->parent)
- p += sprintf(p, ", %s-%d\n", clkp->parent->name,
- clkp->parent->id);
- else
- p += sprintf(p, "\n");
- }
-
- len = (p - page) - off;
- if (len < 0)
- len = 0;
-
- *eof = (len <= count) ? 1 : 0;
- *start = page + off;
-
- return len;
-}
-
-static int __init mxc_setup_proc_entry(void)
-{
- struct proc_dir_entry *res;
-
- res = create_proc_read_entry("cpu/clocks", 0, NULL,
- mxc_clock_read_proc, NULL);
- if (!res) {
- printk(KERN_ERR "Failed to create proc/cpu/clocks\n");
- return -ENOMEM;
- }
- return 0;
-}
-
-late_initcall(mxc_setup_proc_entry);
-#endif /* CONFIG_PROC_FS */
-#endif
-
/*
* Get the resulting clock rate from a PLL register value and the input
* frequency. PLLs with this register layout can at least be found on
@@ -363,12 +210,11 @@ unsigned long mxc_decode_pll(unsigned int reg_val, u32 freq)
mfn_abs = mfn;
-#if !defined CONFIG_ARCH_MX1 && !defined CONFIG_ARCH_MX21
- if (mfn >= 0x200) {
- mfn |= 0xFFFFFE00;
- mfn_abs = -mfn;
- }
-#endif
+ /* On all i.MXs except i.MX1 and i.MX21 mfn is a 10bit
+ * 2's complements number
+ */
+ if (!cpu_is_mx1() && !cpu_is_mx21() && mfn >= 0x200)
+ mfn_abs = 0x400 - mfn;
freq *= 2;
freq /= pd + 1;
@@ -376,8 +222,10 @@ unsigned long mxc_decode_pll(unsigned int reg_val, u32 freq)
ll = (unsigned long long)freq * mfn_abs;
do_div(ll, mfd + 1);
- if (mfn < 0)
+
+ if (!cpu_is_mx1() && !cpu_is_mx21() && mfn >= 0x200)
ll = -ll;
+
ll = (freq * mfi) + ll;
return ll;
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