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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-02-18 22:34:11 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-02-18 22:34:11 +0100
commit10baf04e95fbf7eb6089410220a547211dd2ffa7 (patch)
tree912204612987a3ce2ec0ed214d47911040d79cc1 /arch/arm
parentfdbe0946d4c35d4cc784cfe0a5322708cfb7ade8 (diff)
parentca62cf59ceef10ff2ebca0e7f764507186870270 (diff)
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (35 commits) PM idle: remove global declaration of pm_idle unicore32 idle: delete stray pm_idle comment openrisc idle: delete pm_idle mn10300 idle: delete pm_idle microblaze idle: delete pm_idle m32r idle: delete pm_idle, and other dead idle code ia64 idle: delete pm_idle cris idle: delete idle and pm_idle ARM64 idle: delete pm_idle ARM idle: delete pm_idle blackfin idle: delete pm_idle sparc idle: rename pm_idle to sparc_idle sh idle: rename global pm_idle to static sh_idle x86 idle: rename global pm_idle to static x86_idle APM idle: register apm_cpu_idle via cpuidle tools/power turbostat: display SMI count by default intel_idle: export both C1 and C1E cpuidle: remove vestage definition of cpuidle_state_usage.driver_data x86 idle: remove 32-bit-only "no-hlt" parameter, hlt_works_ok flag x86 idle: remove mwait_idle() and "idle=mwait" cmdline param ... Conflicts: arch/x86/kernel/process.c (with PM / tracing commit 43720bd) drivers/acpi/processor_idle.c (with ACPICA commit 4f84291)
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/kernel/process.c13
-rw-r--r--arch/arm/mach-davinci/cpuidle.c84
2 files changed, 29 insertions, 68 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index c6dec5fc20a..047d3e40e47 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -172,14 +172,9 @@ static void default_idle(void)
local_irq_enable();
}
-void (*pm_idle)(void) = default_idle;
-EXPORT_SYMBOL(pm_idle);
-
/*
- * The idle thread, has rather strange semantics for calling pm_idle,
- * but this is what x86 does and we need to do the same, so that
- * things like cpuidle get called in the same way. The only difference
- * is that we always respect 'hlt_counter' to prevent low power idle.
+ * The idle thread.
+ * We always respect 'hlt_counter' to prevent low power idle.
*/
void cpu_idle(void)
{
@@ -210,10 +205,10 @@ void cpu_idle(void)
} else if (!need_resched()) {
stop_critical_timings();
if (cpuidle_idle_call())
- pm_idle();
+ default_idle();
start_critical_timings();
/*
- * pm_idle functions must always
+ * default_idle functions must always
* return with IRQs enabled.
*/
WARN_ON(irqs_disabled());
diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
index 9107691adbd..5ac9e9384b1 100644
--- a/arch/arm/mach-davinci/cpuidle.c
+++ b/arch/arm/mach-davinci/cpuidle.c
@@ -25,35 +25,44 @@
#define DAVINCI_CPUIDLE_MAX_STATES 2
-struct davinci_ops {
- void (*enter) (u32 flags);
- void (*exit) (u32 flags);
- u32 flags;
-};
+static DEFINE_PER_CPU(struct cpuidle_device, davinci_cpuidle_device);
+static void __iomem *ddr2_reg_base;
+static bool ddr2_pdown;
+
+static void davinci_save_ddr_power(int enter, bool pdown)
+{
+ u32 val;
+
+ val = __raw_readl(ddr2_reg_base + DDR2_SDRCR_OFFSET);
+
+ if (enter) {
+ if (pdown)
+ val |= DDR2_SRPD_BIT;
+ else
+ val &= ~DDR2_SRPD_BIT;
+ val |= DDR2_LPMODEN_BIT;
+ } else {
+ val &= ~(DDR2_SRPD_BIT | DDR2_LPMODEN_BIT);
+ }
+
+ __raw_writel(val, ddr2_reg_base + DDR2_SDRCR_OFFSET);
+}
/* Actual code that puts the SoC in different idle states */
static int davinci_enter_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
- struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
- struct davinci_ops *ops = cpuidle_get_statedata(state_usage);
-
- if (ops && ops->enter)
- ops->enter(ops->flags);
+ davinci_save_ddr_power(1, ddr2_pdown);
index = cpuidle_wrap_enter(dev, drv, index,
arm_cpuidle_simple_enter);
- if (ops && ops->exit)
- ops->exit(ops->flags);
+ davinci_save_ddr_power(0, ddr2_pdown);
return index;
}
-/* fields in davinci_ops.flags */
-#define DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN BIT(0)
-
static struct cpuidle_driver davinci_idle_driver = {
.name = "cpuidle-davinci",
.owner = THIS_MODULE,
@@ -70,45 +79,6 @@ static struct cpuidle_driver davinci_idle_driver = {
.state_count = DAVINCI_CPUIDLE_MAX_STATES,
};
-static DEFINE_PER_CPU(struct cpuidle_device, davinci_cpuidle_device);
-static void __iomem *ddr2_reg_base;
-
-static void davinci_save_ddr_power(int enter, bool pdown)
-{
- u32 val;
-
- val = __raw_readl(ddr2_reg_base + DDR2_SDRCR_OFFSET);
-
- if (enter) {
- if (pdown)
- val |= DDR2_SRPD_BIT;
- else
- val &= ~DDR2_SRPD_BIT;
- val |= DDR2_LPMODEN_BIT;
- } else {
- val &= ~(DDR2_SRPD_BIT | DDR2_LPMODEN_BIT);
- }
-
- __raw_writel(val, ddr2_reg_base + DDR2_SDRCR_OFFSET);
-}
-
-static void davinci_c2state_enter(u32 flags)
-{
- davinci_save_ddr_power(1, !!(flags & DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN));
-}
-
-static void davinci_c2state_exit(u32 flags)
-{
- davinci_save_ddr_power(0, !!(flags & DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN));
-}
-
-static struct davinci_ops davinci_states[DAVINCI_CPUIDLE_MAX_STATES] = {
- [1] = {
- .enter = davinci_c2state_enter,
- .exit = davinci_c2state_exit,
- },
-};
-
static int __init davinci_cpuidle_probe(struct platform_device *pdev)
{
int ret;
@@ -124,11 +94,7 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev)
ddr2_reg_base = pdata->ddr2_ctlr_base;
- if (pdata->ddr2_pdown)
- davinci_states[1].flags |= DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN;
- cpuidle_set_statedata(&device->states_usage[1], &davinci_states[1]);
-
- device->state_count = DAVINCI_CPUIDLE_MAX_STATES;
+ ddr2_pdown = pdata->ddr2_pdown;
ret = cpuidle_register_driver(&davinci_idle_driver);
if (ret) {