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authorlefranc2009-03-19 08:34:57 +0000
committerlefranc2009-03-19 08:34:57 +0000
commitade8df59a0d7d3ac394b61f3096b5963d18dcfcc (patch)
tree486cec51f00d138ab08352a6f5611f4a0323b1ca /cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-pxa/clock.c
parenta49226f2d9f26b70584f3bea9388e2d753663c91 (diff)
[kernel] changed linux-2.6.25.10 to linux-2.6.25.10-spc300
[bundle] add bundle creation functionnality git-svn-id: svn+ssh://pessac/svn/cesar/trunk@4255 017c9cb6-072f-447c-8318-d5b54f68fe89
Diffstat (limited to 'cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-pxa/clock.c')
-rw-r--r--cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-pxa/clock.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-pxa/clock.c b/cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-pxa/clock.c
new file mode 100644
index 0000000000..df5ae2710a
--- /dev/null
+++ b/cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-pxa/clock.c
@@ -0,0 +1,153 @@
+/*
+ * linux/arch/arm/mach-sa1100/clock.c
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/clk.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/hardware.h>
+
+#include "devices.h"
+#include "generic.h"
+#include "clock.h"
+
+static LIST_HEAD(clocks);
+static DEFINE_MUTEX(clocks_mutex);
+static DEFINE_SPINLOCK(clocks_lock);
+
+static struct clk *clk_lookup(struct device *dev, const char *id)
+{
+ struct clk *p;
+
+ list_for_each_entry(p, &clocks, node)
+ if (strcmp(id, p->name) == 0 && p->dev == dev)
+ return p;
+
+ return NULL;
+}
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ struct clk *p, *clk = ERR_PTR(-ENOENT);
+
+ mutex_lock(&clocks_mutex);
+ p = clk_lookup(dev, id);
+ if (!p)
+ p = clk_lookup(NULL, id);
+ if (p)
+ clk = p;
+ mutex_unlock(&clocks_mutex);
+
+ return clk;
+}
+EXPORT_SYMBOL(clk_get);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
+
+int clk_enable(struct clk *clk)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&clocks_lock, flags);
+ if (clk->enabled++ == 0)
+ clk->ops->enable(clk);
+ spin_unlock_irqrestore(&clocks_lock, flags);
+
+ if (clk->delay)
+ udelay(clk->delay);
+
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+ unsigned long flags;
+
+ WARN_ON(clk->enabled == 0);
+
+ spin_lock_irqsave(&clocks_lock, flags);
+ if (--clk->enabled == 0)
+ clk->ops->disable(clk);
+ spin_unlock_irqrestore(&clocks_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ unsigned long rate;
+
+ rate = clk->rate;
+ if (clk->ops->getrate)
+ rate = clk->ops->getrate(clk);
+
+ return rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+
+static void clk_gpio27_enable(struct clk *clk)
+{
+ pxa_gpio_mode(GPIO11_3_6MHz_MD);
+}
+
+static void clk_gpio27_disable(struct clk *clk)
+{
+}
+
+static const struct clkops clk_gpio27_ops = {
+ .enable = clk_gpio27_enable,
+ .disable = clk_gpio27_disable,
+};
+
+
+void clk_cken_enable(struct clk *clk)
+{
+ CKEN |= 1 << clk->cken;
+}
+
+void clk_cken_disable(struct clk *clk)
+{
+ CKEN &= ~(1 << clk->cken);
+}
+
+const struct clkops clk_cken_ops = {
+ .enable = clk_cken_enable,
+ .disable = clk_cken_disable,
+};
+
+static struct clk common_clks[] = {
+ {
+ .name = "GPIO27_CLK",
+ .ops = &clk_gpio27_ops,
+ .rate = 3686400,
+ },
+};
+
+void clks_register(struct clk *clks, size_t num)
+{
+ int i;
+
+ mutex_lock(&clocks_mutex);
+ for (i = 0; i < num; i++)
+ list_add(&clks[i].node, &clocks);
+ mutex_unlock(&clocks_mutex);
+}
+
+static int __init clk_init(void)
+{
+ clks_register(common_clks, ARRAY_SIZE(common_clks));
+ return 0;
+}
+arch_initcall(clk_init);