[2/3] OMAP: add omap_device_reset()

Commit Message

Tomi Valkeinen May 26, 2011, 4:45 p.m. UTC

Add omap_device_reset() function which can be used to reset the hwmods
associated with the given platform device.

Signed-off-by: Tomi Valkeinen <[e-mail]>
---
 arch/arm/plat-omap/include/plat/omap_device.h |    1 +
 arch/arm/plat-omap/omap_device.c              |   23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
index 70d31d0..bcf1b35 100644
--- a/arch/arm/plat-omap/include/plat/omap_device.h
+++ b/arch/arm/plat-omap/include/plat/omap_device.h
@@ -108,6 +108,7 @@  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_get_context_loss_count(struct platform_device *pdev);
+int omap_device_reset(struct platform_device *pdev);
 
 /* Other */
 
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 9753f71..4e6fc1b 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -324,6 +324,29 @@  int omap_device_get_context_loss_count(struct platform_device *pdev)
 }
 
 /**
+ * omap_device_reset - reset hwmods of given device
+ * @pdev: struct platform_device *
+ *
+ * Reset all hwmods associated with the given device. If a reset of a hwmod
+ * fails the rest of the hwmods are skipped and the error is returned.
+ */
+int omap_device_reset(struct platform_device *pdev)
+{
+	struct omap_device *od;
+	int i, r;
+
+	od = _find_by_pdev(pdev);
+
+	for (i = 0; i < od->hwmods_cnt; i++) {
+		r = omap_hwmod_reset(od->hwmods[i]);
+		if (r)
+			return r;
+	}
+
+	return 0;
+}
+
+/**
  * omap_device_count_resources - count number of struct resource entries needed
  * @od: struct omap_device *
  *