OMAP2+: hwmod: add API to handle autoidle mode

Create a new API that forms a wrapper to _set_module_autoidle()
to modify the AUTOIDLE bit.

This API is intended to be used by drivers that requires direct
manipulation of the AUTOIDLE bits in SYSCONFIG register.
McBSP driver requires autoidle bit to be enabled/disabled while
using sidetone feature.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
[paul@pwsan.com: restrict the hwmod states that the autoidle bit can be changed
 in; changed function name; dropped "int" from "unsigned int long"]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 816aeb97ba288fcf83cad2a2f8d2c6c3a27b69e6..a68a2cf1be34b68c13fac0283f795e5ccedbdc4f 100644 (file)
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -1287,6 +1287,42 @@ static int _idle(struct omap_hwmod *oh)
        return 0;
 }
 
+/**
+ * omap_hwmod_set_ocp_autoidle - set the hwmod's OCP autoidle bit
+ * @oh: struct omap_hwmod *
+ * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
+ *
+ * Sets the IP block's OCP autoidle bit in hardware, and updates our
+ * local copy. Intended to be used by drivers that require
+ * direct manipulation of the AUTOIDLE bits.
+ * Returns -EINVAL if @oh is null or is not in the ENABLED state, or passes
+ * along the return value from _set_module_autoidle().
+ *
+ * Any users of this function should be scrutinized carefully.
+ */
+int omap_hwmod_set_ocp_autoidle(struct omap_hwmod *oh, u8 autoidle)
+{
+       u32 v;
+       int retval = 0;
+       unsigned long flags;
+
+       if (!oh || oh->_state != _HWMOD_STATE_ENABLED)
+               return -EINVAL;
+
+       spin_lock_irqsave(&oh->_lock, flags);
+
+       v = oh->_sysc_cache;
+
+       retval = _set_module_autoidle(oh, autoidle, &v);
+
+       if (!retval)
+               _write_sysconfig(v, oh);
+
+       spin_unlock_irqrestore(&oh->_lock, flags);
+
+       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 bba234337d0098982c3c154156e6152f17e59f21..98f7f618a91f605b77005292f48297e2d72a93df 100644 (file)
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -555,6 +555,7 @@ int omap_hwmod_enable_clocks(struct omap_hwmod *oh);
 int omap_hwmod_disable_clocks(struct omap_hwmod *oh);
 
 int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode);
+int omap_hwmod_set_ocp_autoidle(struct omap_hwmod *oh, u8 autoidle);
 
 int omap_hwmod_reset(struct omap_hwmod *oh);
 void omap_hwmod_ocp_barrier(struct omap_hwmod *oh);