ARM: OMAP4+: CPUidle: Consolidate idle driver for OMAP5 support
Santosh Shilimkar [Fri, 5 Apr 2013 12:59:03 +0000 (17:59 +0530)]
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

index e72b55d..8a0e43c 100644 (file)
@@ -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>
  *
 #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;