ARM: at91: Consolidate time keeping and irq enable

Enable core cpuidle timekeeping and irq enabling and remove that
handling from this code.

Signed-off-by: Robert Lee <rob.lee@linaro.org>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c
index a851e6c984218d14533fd5157c7e58fc76c5fc81..d40b3f317f7f7058ff29b657033b3cc0d747dce9 100644 (file)
--- a/arch/arm/mach-at91/cpuidle.c
+++ b/arch/arm/mach-at91/cpuidle.c
@@ -17,9 +17,10 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/cpuidle.h>
-#include <asm/proc-fns.h>
 #include <linux/io.h>
 #include <linux/export.h>
+#include <asm/proc-fns.h>
+#include <asm/cpuidle.h>
 
 #include "pm.h"
 
@@ -27,66 +28,46 @@
 
 static DEFINE_PER_CPU(struct cpuidle_device, at91_cpuidle_device);
 
-static struct cpuidle_driver at91_idle_driver = {
-       .name =         "at91_idle",
-       .owner =        THIS_MODULE,
-};
-
 /* Actual code that puts the SoC in different idle states */
 static int at91_enter_idle(struct cpuidle_device *dev,
                        struct cpuidle_driver *drv,
                               int index)
 {
-       struct timeval before, after;
-       int idle_time;
        u32 saved_lpr;
 
-       local_irq_disable();
-       do_gettimeofday(&before);
-       if (index == 0)
-               /* Wait for interrupt state */
-               cpu_do_idle();
-       else if (index == 1) {
-               asm("b 1f; .align 5; 1:");
-               asm("mcr p15, 0, r0, c7, c10, 4");      /* drain write buffer */
-               saved_lpr = sdram_selfrefresh_enable();
-               cpu_do_idle();
-               sdram_selfrefresh_disable(saved_lpr);
-       }
-       do_gettimeofday(&after);
-       local_irq_enable();
-       idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
-                       (after.tv_usec - before.tv_usec);
+       __asm__("b 1f; .align 5; 1:\n"
+       "       mcr p15, 0, r0, c7, c10, 4");   /* drain write buffer */
+
+       saved_lpr = sdram_selfrefresh_enable();
+       cpu_do_idle();
+       sdram_selfrefresh_disable(saved_lpr);
 
-       dev->last_residency = idle_time;
        return index;
 }
 
+static struct cpuidle_driver at91_idle_driver = {
+       .name                   = "at91_idle",
+       .owner                  = THIS_MODULE,
+       .en_core_tk_irqen       = 1,
+       .states[0]              = ARM_CPUIDLE_WFI_STATE,
+       .states[1]              = {
+               .enter                  = at91_enter_idle,
+               .exit_latency           = 10,
+               .target_residency       = 100000,
+               .flags                  = CPUIDLE_FLAG_TIME_VALID,
+               .name                   = "RAM_SR",
+               .desc                   = "WFI and DDR Self Refresh",
+       },
+       .state_count = AT91_MAX_STATES,
+};
+
 /* Initialize CPU idle by registering the idle states */
 static int at91_init_cpuidle(void)
 {
        struct cpuidle_device *device;
-       struct cpuidle_driver *driver = &at91_idle_driver;
 
        device = &per_cpu(at91_cpuidle_device, smp_processor_id());
        device->state_count = AT91_MAX_STATES;
-       driver->state_count = AT91_MAX_STATES;
-
-       /* Wait for interrupt state */
-       driver->states[0].enter = at91_enter_idle;
-       driver->states[0].exit_latency = 1;
-       driver->states[0].target_residency = 10000;
-       driver->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
-       strcpy(driver->states[0].name, "WFI");
-       strcpy(driver->states[0].desc, "Wait for interrupt");
-
-       /* Wait for interrupt and RAM self refresh state */
-       driver->states[1].enter = at91_enter_idle;
-       driver->states[1].exit_latency = 10;
-       driver->states[1].target_residency = 10000;
-       driver->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
-       strcpy(driver->states[1].name, "RAM_SR");
-       strcpy(driver->states[1].desc, "WFI and RAM Self Refresh");
 
        cpuidle_register_driver(&at91_idle_driver);