ACPI: thinkpad-acpi: add power-management handler capability

Some subdrivers could benefit from resume handling, so add the
infrastructure for simple resume handling.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index c86b228375c..78914bf2166 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -519,11 +519,27 @@ static struct platform_device *tpacpi_pdev;
 static struct class_device *tpacpi_hwmon;
 static struct input_dev *tpacpi_inputdev;
 
+
+static int tpacpi_resume_handler(struct platform_device *pdev)
+{
+        struct ibm_struct *ibm, *itmp;
+
+        list_for_each_entry_safe(ibm, itmp,
+                                 &tpacpi_all_drivers,
+                                 all_drivers) {
+                if (ibm->resume)
+                        (ibm->resume)();
+        }
+
+        return 0;
+}
+
 static struct platform_driver tpacpi_pdriver = {
         .driver = {
                 .name = IBM_DRVR_NAME,
                 .owner = THIS_MODULE,
         },
+        .resume = tpacpi_resume_handler,
 };
 
 
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 00f1bd73df8..c5c1316ae3a 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -205,6 +205,7 @@ struct ibm_struct {
         int (*read) (char *);
         int (*write) (char *);
         void (*exit) (void);
+        void (*resume) (void);
 
         struct list_head all_drivers;