#include <linux/err.h>
#include <linux/device.h>
#include <linux/string.h>
+#include <linux/list.h>
#include <mach/chip.h>
#include "clock.h"
+/* at32 clock list */
+static LIST_HEAD(at32_clock_list);
+
static DEFINE_SPINLOCK(clk_lock);
+static DEFINE_SPINLOCK(clk_list_lock);
+
+void at32_clk_register(struct clk *clk)
+{
+ spin_lock(&clk_list_lock);
+ /* add the new item to the end of the list */
+ list_add_tail(&clk->list, &at32_clock_list);
+ spin_unlock(&clk_list_lock);
+}
struct clk *clk_get(struct device *dev, const char *id)
{
- int i;
+ struct clk *clk;
- for (i = 0; i < at32_nr_clocks; i++) {
- struct clk *clk = at32_clock_list[i];
+ spin_lock(&clk_list_lock);
- if (clk->dev == dev && strcmp(id, clk->name) == 0)
+ list_for_each_entry(clk, &at32_clock_list, list) {
+ if (clk->dev == dev && strcmp(id, clk->name) == 0) {
+ spin_unlock(&clk_list_lock);
return clk;
+ }
}
+ spin_unlock(&clk_list_lock);
return ERR_PTR(-ENOENT);
}
EXPORT_SYMBOL(clk_get);
/* cost of this scan is small, but not linear... */
r->nest = nest + NEST_DELTA;
- for (i = 3; i < at32_nr_clocks; i++) {
- clk = at32_clock_list[i];
+
+ list_for_each_entry(clk, &at32_clock_list, list) {
if (clk->parent == parent)
dump_clock(clk, r);
}
{
struct clkinf r;
int i;
+ struct clk *clk;
/* show all the power manager registers */
seq_printf(s, "MCCTRL = %8x\n", pm_readl(MCCTRL));
seq_printf(s, "\n");
- /* show clock tree as derived from the three oscillators
- * we "know" are at the head of the list
- */
r.s = s;
r.nest = 0;
- dump_clock(at32_clock_list[0], &r);
- dump_clock(at32_clock_list[1], &r);
- dump_clock(at32_clock_list[2], &r);
+ /* protected from changes on the list while dumping */
+ spin_lock(&clk_list_lock);
+
+ /* show clock tree as derived from the three oscillators */
+ clk = clk_get(NULL, "osc32k");
+ dump_clock(clk, &r);
+ clk_put(clk);
+
+ clk = clk_get(NULL, "osc0");
+ dump_clock(clk, &r);
+ clk_put(clk);
+
+ clk = clk_get(NULL, "osc1");
+ dump_clock(clk, &r);
+ clk_put(clk);
+
+ spin_unlock(&clk_list_lock);
return 0;
}