[RFC:] New API to modify the autoidle bits of sysconfig register

Commit Message

Kishon Vijay Abraham I Aug. 26, 2010, 11:45 a.m. UTC

None

Patch

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 9bd99ad..0d38404 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -969,6 +969,35 @@  int _omap_hwmod_idle(struct omap_hwmod *oh)
 }
 
 /**
+ * omap_hwmod_set_module_autoidle - set the hwmod's OCP slave autoidle
+ * @oh: struct omap_hwmod *
+ * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
+ *
+ * Sets the IP block's OCP slave autoidle in hardware, and updates our
+ * local copy. Intended to be used by drivers that have some erratum
+ * that requires direct manipulation of the AUTOIDLE bits.  Returns
+ * -EINVAL if @oh is null, or passes along the return value from
+ * _set_module_autoidle().
+ */
+int omap_hwmod_set_module_autoidle(struct omap_hwmod *oh, u8 autoidle)
+{
+	u32 v;
+	int retval = 0;
+
+	if (!oh)
+		return -EINVAL;
+
+	v = oh->_sysc_cache;
+
+	retval = _set_module_autoidle(oh, autoidle, &v);
+
+	if (!retval)
+		_write_sysconfig(v, oh);
+
+	return retval;
+}
+
+/**
  * _shutdown - shutdown an omap_hwmod
  * @oh: struct omap_hwmod *
  *
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 6adbb63..7042b86 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -526,6 +526,7 @@  int omap_hwmod_hardreset_deassert(struct omap_hwmod *oh, const char *name);
 int omap_hwmod_hardreset_state(struct omap_hwmod *oh, const char *name);
 
 int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode);
+int omap_hwmod_set_module_autoidle(struct omap_hwmod *oh, u8 autoidle)
 
 int omap_hwmod_reset(struct omap_hwmod *oh);
 void omap_hwmod_ocp_barrier(struct omap_hwmod *oh);