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Diffstat (limited to 'arch/arm/plat-omap/omap_device.c')
-rw-r--r--arch/arm/plat-omap/omap_device.c43
1 files changed, 42 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index d2b160942ccc..ceba58a47595 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -82,6 +82,7 @@
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/io.h>
+#include <linux/clk.h>
#include <plat/omap_device.h>
#include <plat/omap_hwmod.h>
@@ -243,6 +244,44 @@ static inline struct omap_device *_find_by_pdev(struct platform_device *pdev)
return container_of(pdev, struct omap_device, pdev);
}
+/**
+ * _add_optional_clock_alias - Add clock alias for hwmod optional clocks
+ * @od: struct omap_device *od
+ *
+ * For every optional clock present per hwmod per omap_device, this function
+ * adds an entry in the clocks list of the form <dev-id=dev_name, con-id=role>
+ * if an entry is already present in it with the form <dev-id=NULL, con-id=role>
+ *
+ * The function is called from inside omap_device_build_ss(), after
+ * omap_device_register.
+ *
+ * This allows drivers to get a pointer to its optional clocks based on its role
+ * by calling clk_get(<dev*>, <role>).
+ *
+ * No return value.
+ */
+static void _add_optional_clock_alias(struct omap_device *od,
+ struct omap_hwmod *oh)
+{
+ int i;
+
+ for (i = 0; i < oh->opt_clks_cnt; i++) {
+ struct omap_hwmod_opt_clk *oc;
+ int r;
+
+ oc = &oh->opt_clks[i];
+
+ if (!oc->_clk)
+ continue;
+
+ r = clk_add_alias(oc->role, dev_name(&od->pdev.dev),
+ (char *)oc->clk, &od->pdev.dev);
+ if (r)
+ pr_err("omap_device: %s: clk_add_alias for %s failed\n",
+ dev_name(&od->pdev.dev), oc->role);
+ }
+}
+
/* Public functions for use by core code */
@@ -421,8 +460,10 @@ struct omap_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
else
ret = omap_device_register(od);
- for (i = 0; i < oh_cnt; i++)
+ for (i = 0; i < oh_cnt; i++) {
hwmods[i]->od = od;
+ _add_optional_clock_alias(od, hwmods[i]);
+ }
if (ret)
goto odbs_exit4;