Hook into the platform bus methods for suspend and resume and
use the omap_device API to automatically idle and enable the
device on suspend and resume.
This allows device drivers to get rid of direct management of their
clocks in their suspend/resume paths, and let omap_device do it for
them.
We currently use the _noirq (late suspend, early resume) versions of
the suspend/resume methods to ensure that the device is not disabled
too early for any drivers also using the _noirq methods.
NOTE: only works for devices with omap_hwmod support.
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/pm_bus.c | 61 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/pm_bus.c b/arch/arm/mach-omap2/pm_bus.c
index 69acaa5..3787da8 100644
--- a/arch/arm/mach-omap2/pm_bus.c
+++ b/arch/arm/mach-omap2/pm_bus.c
@@ -70,3 +70,64 @@ int platform_pm_runtime_idle(struct device *dev)
};
#endif /* CONFIG_PM_RUNTIME */
+#ifdef CONFIG_SUSPEND
+int platform_pm_suspend_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_device *odev = to_omap_device(pdev);
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->suspend_noirq)
+ ret = drv->pm->suspend_noirq(dev);
+ }
+
+ if (omap_device_is_valid(odev)) {
+ if (odev->flags & OMAP_DEVICE_NO_BUS_SUSPEND) {
+ dev_dbg(dev, "no automatic bus-level system resume.\n");
+ return 0;
+ }
+
+ dev_dbg(dev, "%s\n", __func__);
+ omap_device_idle(pdev);
+ } else {
+ dev_dbg(dev, "not an omap_device\n");
+ }
+
+ return ret;
+}
+
+int platform_pm_resume_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_device *odev = to_omap_device(pdev);
+ int ret = 0;
+
+ if (omap_device_is_valid(odev)) {
+ if (odev->flags & OMAP_DEVICE_NO_BUS_SUSPEND) {
+ dev_dbg(dev, "no automatic bus-level system resume.\n");
+ return 0;
+ }
+
+ dev_dbg(dev, "%s\n", __func__);
+ omap_device_enable(pdev);
+ } else {
+ dev_dbg(dev, "not an omap_device\n");
+ }
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->resume_noirq)
+ ret = drv->pm->resume_noirq(dev);
+ }
+
+ return ret;
+}
+#endif /* CONFIG_SUSPEND */
--
1.7.0.2
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
