[v2,05/14] OMAP: Introduce device specific set rate and get rate in omap_device structure

Commit Message

Thara Gopinath Oct. 29, 2010, 3:38 p.m. UTC

None

Patch

diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
index 28e2d1a..2a37345 100644
--- a/arch/arm/plat-omap/include/plat/omap_device.h
+++ b/arch/arm/plat-omap/include/plat/omap_device.h
@@ -50,6 +50,8 @@  extern struct device omap_device_parent;
  * @hwmods: (one .. many per omap_device)
  * @hwmods_cnt: ARRAY_SIZE() of @hwmods
  * @pm_lats: ptr to an omap_device_pm_latency table
+ * @set_rate: fn ptr to change the operating rate.
+ * @get_rate: fn ptr to retrieve the current operating rate.
  * @pm_lats_cnt: ARRAY_SIZE() of what is passed to @pm_lats
  * @pm_lat_level: array index of the last odpl entry executed - -1 if never
  * @dev_wakeup_lat: dev wakeup latency in nanoseconds
@@ -67,6 +69,8 @@  struct omap_device {
 	struct platform_device		pdev;
 	struct omap_hwmod		**hwmods;
 	struct omap_device_pm_latency	*pm_lats;
+	int (*set_rate)(struct device *dev, unsigned long rate);
+	unsigned long (*get_rate) (struct device *dev);
 	u32				dev_wakeup_lat;
 	u32				_dev_wakeup_lat_limit;
 	u8				pm_lats_cnt;
@@ -107,6 +111,11 @@  void __iomem *omap_device_get_rt_va(struct omap_device *od);
 int omap_device_align_pm_lat(struct platform_device *pdev,
 			     u32 new_wakeup_lat_limit);
 struct powerdomain *omap_device_get_pwrdm(struct omap_device *od);
+int omap_device_set_rate(struct device *dev, unsigned long freq);
+unsigned long omap_device_get_rate(struct device *dev);
+void omap_device_populate_rate_fns(struct device *dev,
+		int (*set_rate)(struct device *dev, unsigned long rate),
+		unsigned long (*get_rate) (struct device *dev));
 
 /* Other */
 
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 7c902a6..ffe06eb 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -785,6 +785,55 @@  int omap_device_enable_clocks(struct omap_device *od)
 	return 0;
 }
 
+int omap_device_set_rate(struct device *dev, unsigned long freq)
+{
+	struct platform_device *pdev;
+	struct omap_device *od;
+
+	pdev = container_of(dev, struct platform_device, dev);
+	od = _find_by_pdev(pdev);
+
+	if (!od->set_rate) {
+		dev_err(dev, "%s: No set_rate API for scaling device\n",
+			__func__);
+		return -ENODATA;
+	}
+
+	return od->set_rate(dev, freq);
+}
+
+unsigned long omap_device_get_rate(struct device *dev)
+{
+	struct platform_device *pdev;
+	struct omap_device *od;
+
+	pdev = container_of(dev, struct platform_device, dev);
+	od = _find_by_pdev(pdev);
+
+
+	if (!od->get_rate) {
+		dev_err(dev, "%s: No get rate API for the device\n",
+			__func__);
+		return 0;
+	}
+
+	return od->get_rate(dev);
+}
+
+void omap_device_populate_rate_fns(struct device *dev,
+		int (*set_rate)(struct device *dev, unsigned long rate),
+		unsigned long (*get_rate) (struct device *dev))
+{
+	struct platform_device *pdev;
+	struct omap_device *od;
+
+	pdev = container_of(dev, struct platform_device, dev);
+	od = _find_by_pdev(pdev);
+
+	od->set_rate = set_rate;
+	od->get_rate = get_rate;
+}
+
 struct device omap_device_parent = {
 	.init_name	= "omap",
 	.parent         = &platform_bus,