From fe52e3ff7a3a2c92911fbb793ff660f4e72a8aa1 Mon Sep 17 00:00:00 2001
From: Tero Kristo <t-kristo@ti.com>
Date: Sun, 23 Sep 2012 17:28:19 -0600
Subject: [PATCH] --- yaml --- r: 331297 b: refs/heads/master c:
 5b8a14be513ca1172c72ec181a5e22ec18fb7bf5 h: refs/heads/master i:   331295:
 7ec8ae956a796d3d42607b0ec1f21505effc8e89 v: v3

---
 [refs]                                      |  2 +-
 trunk/arch/arm/mach-omap2/powerdomain44xx.c | 61 ++++++++++++++++++++-
 2 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index aba38cb8efc6..920e72e5f9d3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3bb05dbf69018177c06ee09011e2d8bd183dd2ba
+refs/heads/master: 5b8a14be513ca1172c72ec181a5e22ec18fb7bf5
diff --git a/trunk/arch/arm/mach-omap2/powerdomain44xx.c b/trunk/arch/arm/mach-omap2/powerdomain44xx.c
index aeac6f35ca10..aceb4f464c9b 100644
--- a/trunk/arch/arm/mach-omap2/powerdomain44xx.c
+++ b/trunk/arch/arm/mach-omap2/powerdomain44xx.c
@@ -1,7 +1,7 @@
 /*
  * OMAP4 powerdomain control
  *
- * Copyright (C) 2009-2010 Texas Instruments, Inc.
+ * Copyright (C) 2009-2010, 2012 Texas Instruments, Inc.
  * Copyright (C) 2007-2009 Nokia Corporation
  *
  * Derived from mach-omap2/powerdomain.c written by Paul Walmsley
@@ -151,6 +151,34 @@ static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
 	return v;
 }
 
+/**
+ * omap4_pwrdm_read_prev_logic_pwrst - read the previous logic powerstate
+ * @pwrdm: struct powerdomain * to read the state for
+ *
+ * Reads the previous logic powerstate for a powerdomain. This
+ * function must determine the previous logic powerstate by first
+ * checking the previous powerstate for the domain. If that was OFF,
+ * then logic has been lost. If previous state was RETENTION, the
+ * function reads the setting for the next retention logic state to
+ * see the actual value.  In every other case, the logic is
+ * retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET
+ * depending whether the logic was retained or not.
+ */
+static int omap4_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
+{
+	int state;
+
+	state = omap4_pwrdm_read_prev_pwrst(pwrdm);
+
+	if (state == PWRDM_POWER_OFF)
+		return PWRDM_POWER_OFF;
+
+	if (state != PWRDM_POWER_RET)
+		return PWRDM_POWER_RET;
+
+	return omap4_pwrdm_read_logic_retst(pwrdm);
+}
+
 static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
 {
 	u32 m, v;
@@ -179,6 +207,35 @@ static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
 	return v;
 }
 
+/**
+ * omap4_pwrdm_read_prev_mem_pwrst - reads the previous memory powerstate
+ * @pwrdm: struct powerdomain * to read mem powerstate for
+ * @bank: memory bank index
+ *
+ * Reads the previous memory powerstate for a powerdomain. This
+ * function must determine the previous memory powerstate by first
+ * checking the previous powerstate for the domain. If that was OFF,
+ * then logic has been lost. If previous state was RETENTION, the
+ * function reads the setting for the next memory retention state to
+ * see the actual value.  In every other case, the logic is
+ * retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET
+ * depending whether logic was retained or not.
+ */
+static int omap4_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
+{
+	int state;
+
+	state = omap4_pwrdm_read_prev_pwrst(pwrdm);
+
+	if (state == PWRDM_POWER_OFF)
+		return PWRDM_POWER_OFF;
+
+	if (state != PWRDM_POWER_RET)
+		return PWRDM_POWER_RET;
+
+	return omap4_pwrdm_read_mem_retst(pwrdm, bank);
+}
+
 static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
 {
 	u32 c = 0;
@@ -217,9 +274,11 @@ struct pwrdm_ops omap4_pwrdm_operations = {
 	.pwrdm_clear_all_prev_pwrst	= omap4_pwrdm_clear_all_prev_pwrst,
 	.pwrdm_set_logic_retst	= omap4_pwrdm_set_logic_retst,
 	.pwrdm_read_logic_pwrst	= omap4_pwrdm_read_logic_pwrst,
+	.pwrdm_read_prev_logic_pwrst	= omap4_pwrdm_read_prev_logic_pwrst,
 	.pwrdm_read_logic_retst	= omap4_pwrdm_read_logic_retst,
 	.pwrdm_read_mem_pwrst	= omap4_pwrdm_read_mem_pwrst,
 	.pwrdm_read_mem_retst	= omap4_pwrdm_read_mem_retst,
+	.pwrdm_read_prev_mem_pwrst	= omap4_pwrdm_read_prev_mem_pwrst,
 	.pwrdm_set_mem_onst	= omap4_pwrdm_set_mem_onst,
 	.pwrdm_set_mem_retst	= omap4_pwrdm_set_mem_retst,
 	.pwrdm_wait_transition	= omap4_pwrdm_wait_transition,