From 578357a6693f220624b2c481aae09ec638be50f7 Mon Sep 17 00:00:00 2001
From: Paul Walmsley <paul@pwsan.com>
Date: Sun, 10 Jul 2011 05:56:54 -0600
Subject: [PATCH] --- yaml --- r: 260671 b: refs/heads/master c:
 32a363c0f5b44cb4e9adfe238dfc4efa9270f7ae h: refs/heads/master i:   260669:
 4f4affc36b3260af7edaab32adfb6f695cc61b12   260667:
 e6675a8f75c3eeb3ee6012e0ad9245c7a74688af   260663:
 14f2653a3780591082e3c5f85b7dd0c68ffa3181   260655:
 6d791841f6654805dffdb9e6dd0f485f8b253ff8   260639:
 3bba9b9584ef001824e3d874373d3fc0a17a96bb   260607:
 aabc8f920cf0180c913170c512287f6e1f6725bd v: v3

---
 [refs]                                  |  2 +-
 trunk/arch/arm/mach-omap2/clockdomain.c | 30 +++++++++++++++++++++++--
 trunk/arch/arm/mach-omap2/clockdomain.h |  6 +++++
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 434eecd4b646..d3242f43ebcb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 113a74137f5c85f2c7914e78350f70247ef9447c
+refs/heads/master: 32a363c0f5b44cb4e9adfe238dfc4efa9270f7ae
diff --git a/trunk/arch/arm/mach-omap2/clockdomain.c b/trunk/arch/arm/mach-omap2/clockdomain.c
index 5a57de563b30..239b558853f5 100644
--- a/trunk/arch/arm/mach-omap2/clockdomain.c
+++ b/trunk/arch/arm/mach-omap2/clockdomain.c
@@ -1,8 +1,8 @@
 /*
  * OMAP2/3/4 clockdomain framework functions
  *
- * Copyright (C) 2008-2010 Texas Instruments, Inc.
- * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2008-2011 Texas Instruments, Inc.
+ * Copyright (C) 2008-2011 Nokia Corporation
  *
  * Written by Paul Walmsley and Jouni Högander
  * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
@@ -704,6 +704,8 @@ int clkdm_sleep(struct clockdomain *clkdm)
 
 	pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
 
+	clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
+
 	return arch_clkdm->clkdm_sleep(clkdm);
 }
 
@@ -732,6 +734,8 @@ int clkdm_wakeup(struct clockdomain *clkdm)
 
 	pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
 
+	clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
+
 	return arch_clkdm->clkdm_wakeup(clkdm);
 }
 
@@ -762,6 +766,8 @@ void clkdm_allow_idle(struct clockdomain *clkdm)
 	pr_debug("clockdomain: enabling automatic idle transitions for %s\n",
 		 clkdm->name);
 
+	clkdm->_flags |= _CLKDM_FLAG_HWSUP_ENABLED;
+
 	arch_clkdm->clkdm_allow_idle(clkdm);
 	pwrdm_clkdm_state_switch(clkdm);
 }
@@ -792,9 +798,29 @@ void clkdm_deny_idle(struct clockdomain *clkdm)
 	pr_debug("clockdomain: disabling automatic idle transitions for %s\n",
 		 clkdm->name);
 
+	clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
+
 	arch_clkdm->clkdm_deny_idle(clkdm);
 }
 
+/**
+ * clkdm_in_hwsup - is clockdomain @clkdm have hardware-supervised idle enabled?
+ * @clkdm: struct clockdomain *
+ *
+ * Returns true if clockdomain @clkdm currently has
+ * hardware-supervised idle enabled, or false if it does not or if
+ * @clkdm is NULL.  It is only valid to call this function after
+ * clkdm_init() has been called.  This function does not actually read
+ * bits from the hardware; it instead tests an in-memory flag that is
+ * changed whenever the clockdomain code changes the auto-idle mode.
+ */
+bool clkdm_in_hwsup(struct clockdomain *clkdm)
+{
+	if (!clkdm)
+		return false;
+
+	return (clkdm->_flags & _CLKDM_FLAG_HWSUP_ENABLED) ? true : false;
+}
 
 /* Clockdomain-to-clock/hwmod framework interface code */
 
diff --git a/trunk/arch/arm/mach-omap2/clockdomain.h b/trunk/arch/arm/mach-omap2/clockdomain.h
index 8e0da642355c..8782a5cadfa6 100644
--- a/trunk/arch/arm/mach-omap2/clockdomain.h
+++ b/trunk/arch/arm/mach-omap2/clockdomain.h
@@ -83,6 +83,9 @@ struct clkdm_dep {
 	const struct omap_chip_id omap_chip;
 };
 
+/* Possible flags for struct clockdomain._flags */
+#define _CLKDM_FLAG_HWSUP_ENABLED		BIT(0)
+
 /**
  * struct clockdomain - OMAP clockdomain
  * @name: clockdomain name
@@ -90,6 +93,7 @@ struct clkdm_dep {
  * @clktrctrl_reg: CLKSTCTRL reg for the given clock domain
  * @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg
  * @flags: Clockdomain capability flags
+ * @_flags: Flags for use only by internal clockdomain code
  * @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit
  * @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers
  * @cm_inst: (OMAP4 only) CM instance register offset
@@ -114,6 +118,7 @@ struct clockdomain {
 	} pwrdm;
 	const u16 clktrctrl_mask;
 	const u8 flags;
+	u8 _flags;
 	const u8 dep_bit;
 	const u8 prcm_partition;
 	const s16 cm_inst;
@@ -178,6 +183,7 @@ int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm);
 
 void clkdm_allow_idle(struct clockdomain *clkdm);
 void clkdm_deny_idle(struct clockdomain *clkdm);
+bool clkdm_in_hwsup(struct clockdomain *clkdm);
 
 int clkdm_wakeup(struct clockdomain *clkdm);
 int clkdm_sleep(struct clockdomain *clkdm);