[02/11] OMAP clock: add omap_clk_get_by_name() for use by OMAP hwmod core code

Commit Message

Paul Walmsley Feb. 23, 2010, 4:50 a.m. UTC

None

Patch

diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index f244b17..6cc13e7 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -313,6 +313,33 @@  void clk_enable_init_clocks(void)
 	}
 }
 
+/**
+ * omap_clk_get_by_name - locate OMAP struct clk by its name
+ * @name: name of the struct clk to locate
+ *
+ * Locate an OMAP struct clk by its name.  Assumes that struct clk
+ * names are unique.  Returns NULL if not found or a pointer to the
+ * struct clk if found.
+ */
+struct clk *omap_clk_get_by_name(const char *name)
+{
+	struct clk *c;
+	struct clk *ret = NULL;
+
+	mutex_lock(&clocks_mutex);
+
+	list_for_each_entry(c, &clocks, node) {
+		if (!strcmp(c->name, name)) {
+			ret = c;
+			break;
+		}
+	}
+
+	mutex_unlock(&clocks_mutex);
+
+	return ret;
+}
+
 /*
  * Low level helpers
  */
diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h
index 5e1c035..6a32ac1 100644
--- a/arch/arm/plat-omap/include/plat/clock.h
+++ b/arch/arm/plat-omap/include/plat/clock.h
@@ -184,6 +184,7 @@  unsigned long omap_fixed_divisor_recalc(struct clk *clk);
 extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
 extern void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
 #endif
+extern struct clk *omap_clk_get_by_name(const char *name);
 
 extern const struct clkops clkops_null;