drm: replace open-coded ARRAY_SIZE with macro

[cascardo/linux.git] / drivers / acpi / sleep.c

diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index ca191ff..1d661b5 100644 (file)
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -17,6 +17,8 @@
 #include <linux/suspend.h>
 #include <linux/reboot.h>
 #include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
 
 #include <asm/io.h>
 
@@ -26,6 +28,24 @@
 #include "internal.h"
 #include "sleep.h"
 
+static unsigned int gts, bfs;
+module_param(gts, uint, 0644);
+module_param(bfs, uint, 0644);
+MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
+MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
+
+static u8 wake_sleep_flags(void)
+{
+       u8 flags = ACPI_NO_OPTIONAL_METHODS;
+
+       if (gts)
+               flags |= ACPI_EXECUTE_GTS;
+       if (bfs)
+               flags |= ACPI_EXECUTE_BFS;
+
+       return flags;
+}
+
 static u8 sleep_states[ACPI_S_STATE_COUNT];
 
 static void acpi_sleep_tts_switch(u32 acpi_state)
@@ -243,6 +263,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
 {
        acpi_status status = AE_OK;
        u32 acpi_state = acpi_target_sleep_state;
+       u8 flags = wake_sleep_flags();
        int error;
 
        ACPI_FLUSH_CPU_CACHE();
@@ -250,7 +271,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
        switch (acpi_state) {
        case ACPI_STATE_S1:
                barrier();
-               status = acpi_enter_sleep_state(acpi_state);
+               status = acpi_enter_sleep_state(acpi_state, flags);
                break;
 
        case ACPI_STATE_S3:
@@ -265,7 +286,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
        acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
 
        /* Reprogram control registers and execute _BFS */
-       acpi_leave_sleep_state_prep(acpi_state);
+       acpi_leave_sleep_state_prep(acpi_state, flags);
 
        /* ACPI 3.0 specs (P62) says that it's the responsibility
         * of the OSPM to clear the status bit [ implying that the
@@ -529,27 +550,30 @@ static int acpi_hibernation_begin(void)
 
 static int acpi_hibernation_enter(void)
 {
+       u8 flags = wake_sleep_flags();
        acpi_status status = AE_OK;
 
        ACPI_FLUSH_CPU_CACHE();
 
        /* This shouldn't return.  If it returns, we have a problem */
-       status = acpi_enter_sleep_state(ACPI_STATE_S4);
+       status = acpi_enter_sleep_state(ACPI_STATE_S4, flags);
        /* Reprogram control registers and execute _BFS */
-       acpi_leave_sleep_state_prep(ACPI_STATE_S4);
+       acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags);
 
        return ACPI_SUCCESS(status) ? 0 : -EFAULT;
 }
 
 static void acpi_hibernation_leave(void)
 {
+       u8 flags = wake_sleep_flags();
+
        /*
         * If ACPI is not enabled by the BIOS and the boot kernel, we need to
         * enable it here.
         */
        acpi_enable();
        /* Reprogram control registers and execute _BFS */
-       acpi_leave_sleep_state_prep(ACPI_STATE_S4);
+       acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags);
        /* Check the hardware signature */
        if (facs && s4_hardware_signature != facs->hardware_signature) {
                printk(KERN_EMERG "ACPI: Hardware changed while hibernated, "
@@ -729,6 +753,40 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
 #endif /* CONFIG_PM */
 
 #ifdef CONFIG_PM_SLEEP
+/**
+ * acpi_pm_device_run_wake - Enable/disable wake-up for given device.
+ * @phys_dev: Device to enable/disable the platform to wake-up the system for.
+ * @enable: Whether enable or disable the wake-up functionality.
+ *
+ * Find the ACPI device object corresponding to @pci_dev and try to
+ * enable/disable the GPE associated with it.
+ */
+int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
+{
+       struct acpi_device *dev;
+       acpi_handle handle;
+
+       if (!device_run_wake(phys_dev))
+               return -EINVAL;
+
+       handle = DEVICE_ACPI_HANDLE(phys_dev);
+       if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) {
+               dev_dbg(phys_dev, "ACPI handle has no context in %s!\n",
+                       __func__);
+               return -ENODEV;
+       }
+
+       if (enable) {
+               acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0);
+               acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
+       } else {
+               acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
+               acpi_disable_wakeup_device_power(dev);
+       }
+
+       return 0;
+}
+
 /**
  *     acpi_pm_device_sleep_wake - enable or disable the system wake-up
  *                                  capability of given device
@@ -770,10 +828,12 @@ static void acpi_power_off_prepare(void)
 
 static void acpi_power_off(void)
 {
+       u8 flags = wake_sleep_flags();
+
        /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
        printk(KERN_DEBUG "%s called\n", __func__);
        local_irq_disable();
-       acpi_enter_sleep_state(ACPI_STATE_S5);
+       acpi_enter_sleep_state(ACPI_STATE_S5, flags);
 }
 
 /*
@@ -788,13 +848,13 @@ static void __init acpi_gts_bfs_check(void)
 {
        acpi_handle dummy;
 
-       if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy)))
+       if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__GTS, &dummy)))
        {
                printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n");
                printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, "
                        "please notify linux-acpi@vger.kernel.org\n");
        }
-       if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy)))
+       if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__BFS, &dummy)))
        {
                printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n");
                printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, "