ARM: OMAP4+: CPUidle: Consolidate idle driver for OMAP5 support

The OMAP5 idle driver can re-use most of OMAP4 CPUidle driver
implementation. Also the next derivative SOCs are going to re-use
the MPUSS so, same driver with minor updates can be re-used.

Prepare the code so that its easier to add CPUidle support for
OMAP5 devices.

Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>

arch/arm/mach-omap2/cpuidle44xx.c

@@ -1,7 +1,7 @@
 /*
- * OMAP4 CPU idle Routines
+ * OMAP4+ CPU idle Routines
  *
- * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011-2013 Texas Instruments, Inc.
  * Santosh Shilimkar <santosh.shilimkar@ti.com>
  * Rajendra Nayak <rnayak@ti.com>
  *
@@ -23,13 +23,13 @@
 #include "clockdomain.h"
 
 /* Machine specific information */
-struct omap4_idle_statedata {
+struct idle_statedata {
 	u32 cpu_state;
 	u32 mpu_logic_state;
 	u32 mpu_state;
 };
 
-static struct omap4_idle_statedata omap4_idle_data[] = {
+static struct idle_statedata omap4_idle_data[] = {
 	{
 		.cpu_state = PWRDM_POWER_ON,
 		.mpu_state = PWRDM_POWER_ON,
@@ -52,11 +52,12 @@ static struct clockdomain *cpu_clkdm[NR_CPUS];
 
 static atomic_t abort_barrier;
 static bool cpu_done[NR_CPUS];
+static struct idle_statedata *state_ptr = &omap4_idle_data[0];
 
 /* Private functions */
 
 /**
- * omap4_enter_idle_coupled_[simple/coupled] - OMAP4 cpuidle entry functions
+ * omap_enter_idle_[simple/coupled] - OMAP4PLUS cpuidle entry functions
  * @dev: cpuidle device
  * @drv: cpuidle driver
  * @index: the index of state to be entered
@@ -65,7 +66,7 @@ static bool cpu_done[NR_CPUS];
  * specified low power state selected by the governor.
  * Returns the amount of time spent in the low power state.
  */
-static int omap4_enter_idle_simple(struct cpuidle_device *dev,
+static int omap_enter_idle_simple(struct cpuidle_device *dev,
 			struct cpuidle_driver *drv,
 			int index)
 {
@@ -76,11 +77,11 @@ static int omap4_enter_idle_simple(struct cpuidle_device *dev,
 	return index;
 }
 
-static int omap4_enter_idle_coupled(struct cpuidle_device *dev,
+static int omap_enter_idle_coupled(struct cpuidle_device *dev,
 			struct cpuidle_driver *drv,
 			int index)
 {
-	struct omap4_idle_statedata *cx = &omap4_idle_data[index];
+	struct idle_statedata *cx = state_ptr + index;
 
 	local_fiq_disable();
 
@@ -158,7 +159,7 @@ fail:
 	return index;
 }
 
-static DEFINE_PER_CPU(struct cpuidle_device, omap4_idle_dev);
+static DEFINE_PER_CPU(struct cpuidle_device, omap_idle_dev);
 
 static struct cpuidle_driver omap4_idle_driver = {
 	.name				= "omap4_idle",
@@ -170,7 +171,7 @@ static struct cpuidle_driver omap4_idle_driver = {
 			.exit_latency = 2 + 2,
 			.target_residency = 5,
 			.flags = CPUIDLE_FLAG_TIME_VALID,
-			.enter = omap4_enter_idle_simple,
+			.enter = omap_enter_idle_simple,
 			.name = "C1",
 			.desc = "CPUx ON, MPUSS ON"
 		},
@@ -180,7 +181,7 @@ static struct cpuidle_driver omap4_idle_driver = {
 			.target_residency = 960,
 			.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_COUPLED |
 			         CPUIDLE_FLAG_TIMER_STOP,
-			.enter = omap4_enter_idle_coupled,
+			.enter = omap_enter_idle_coupled,
 			.name = "C2",
 			.desc = "CPUx OFF, MPUSS CSWR",
 		},
@@ -190,7 +191,7 @@ static struct cpuidle_driver omap4_idle_driver = {
 			.target_residency = 1100,
 			.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_COUPLED |
 			         CPUIDLE_FLAG_TIMER_STOP,
-			.enter = omap4_enter_idle_coupled,
+			.enter = omap_enter_idle_coupled,
 			.name = "C3",
 			.desc = "CPUx OFF, MPUSS OSWR",
 		},
@@ -202,9 +203,9 @@ static struct cpuidle_driver omap4_idle_driver = {
 /* Public functions */
 
 /**
- * omap4_idle_init - Init routine for OMAP4 idle
+ * omap4_idle_init - Init routine for OMAP4+ idle
  *
- * Registers the OMAP4 specific cpuidle driver to the cpuidle
+ * Registers the OMAP4+ specific cpuidle driver to the cpuidle
  * framework with the valid set of states.
  */
 int __init omap4_idle_init(void)
@@ -229,7 +230,7 @@ int __init omap4_idle_init(void)
 	}
 
 	for_each_cpu(cpu_id, cpu_online_mask) {
-		dev = &per_cpu(omap4_idle_dev, cpu_id);
+		dev = &per_cpu(omap_idle_dev, cpu_id);
 		dev->cpu = cpu_id;
 #ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
 		dev->coupled_cpus = *cpu_online_mask;