1 files changed, 120 insertions, 0 deletions

diff --git a/extras/recipes-kernel/linux/linux-omap/dvfs/0009-OMAP-Introduce-device-specific-set-rate-and-get-rate.patch b/extras/recipes-kernel/linux/linux-omap/dvfs/0009-OMAP-Introduce-device-specific-set-rate-and-get-rate.patch
new file mode 100644
index 00000000..f5914aa3
--- /dev/null
+++ b/extras/recipes-kernel/linux/linux-omap/dvfs/0009-OMAP-Introduce-device-specific-set-rate-and-get-rate.patch
@@ -0,0 +1,120 @@
+From 6ec7cf889c9a8ddf97fbbcbda4888b0f17930e04 Mon Sep 17 00:00:00 2001
+From: Thara Gopinath <thara@ti.com>
+Date: Fri, 29 Oct 2010 20:43:29 +0530
+Subject: [PATCH 09/20] OMAP: Introduce device specific set rate and get rate in omap_device structure
+
+This patch extends the omap_device structure to contain
+pointers to scale the operating rate of the
+device and to retrieve the operating rate of the device.
+This patch also adds the three new APIs in the omap device layer
+namely omap_device_set_rate that can be called to set a new operating
+rate for a device, omap_device_get_rate that can be called to retrieve
+the operating frequency for a device and omap_device_populate_rate_fns
+to populte the device specific set_rate and get_rate API's.
+The omap_device_set_rate and omap_device_get_rate does some routine error
+checks and finally calls into the device specific set_rate
+and get_rate APIs populated through omap_device_populate_rate_fns.
+
+Signed-off-by: Thara Gopinath <thara@ti.com>
+---
+ arch/arm/plat-omap/include/plat/omap_device.h |    9 +++++
+ arch/arm/plat-omap/omap_device.c              |   49 +++++++++++++++++++++++++
+ 2 files changed, 58 insertions(+), 0 deletions(-)
+
+diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
+index e4c349f..1178b86 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;
+@@ -108,6 +112,11 @@ 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);
+ u32 omap_device_get_context_loss_count(struct platform_device *pdev);
++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 2c95e61..0d67af6 100644
+--- a/arch/arm/plat-omap/omap_device.c
++++ b/arch/arm/plat-omap/omap_device.c
+@@ -813,6 +813,55 @@ 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,
+-- 
+1.6.6.1
+