PM / Runtime: Add subsystem data field to struct dev_pm_info

Some subsystems need to attach PM-related data to struct device and
they need to use devres for this purpose.  For their convenience
and to make code more straightforward, add a new field called
subsys_data to struct dev_pm_info and let subsystems use it for
attaching PM-related information to devices.

Convert the ARM shmobile platform to using the new field.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 17 insertions, 17 deletions

diff --git a/arch/arm/mach-shmobile/pm_runtime.c b/arch/arm/mach-shmobile/pm_runtime.c
index 12bb504c7f49..30bbe9a99ae1 100644
--- a/arch/arm/mach-shmobile/pm_runtime.c
+++ b/arch/arm/mach-shmobile/pm_runtime.c
@@ -18,6 +18,7 @@
 #include <linux/clk.h>
 #include <linux/sh_clk.h>
 #include <linux/bitmap.h>
+#include <linux/slab.h>
 
 #ifdef CONFIG_PM_RUNTIME
 #define BIT_ONCE 0
@@ -29,22 +30,9 @@ struct pm_runtime_data {
         struct clk *clk;
 };
 
-static void __devres_release(struct device *dev, void *res)
-{
-        struct pm_runtime_data *prd = res;
-
-        dev_dbg(dev, "__devres_release()\n");
-
-        if (test_bit(BIT_CLK_ENABLED, &prd->flags))
-                clk_disable(prd->clk);
-
-        if (test_bit(BIT_ACTIVE, &prd->flags))
-                clk_put(prd->clk);
-}
-
 static struct pm_runtime_data *__to_prd(struct device *dev)
 {
-        return devres_find(dev, __devres_release, NULL, NULL);
+        return dev ? dev->power.subsys_data : NULL;
 }
 
 static void platform_pm_runtime_init(struct device *dev,
@@ -121,14 +109,26 @@ static int platform_bus_notify(struct notifier_block *nb,
 
         dev_dbg(dev, "platform_bus_notify() %ld !\n", action);
 
-        if (action == BUS_NOTIFY_BIND_DRIVER) {
-                prd = devres_alloc(__devres_release, sizeof(*prd), GFP_KERNEL);
+        switch (action) {
+        case BUS_NOTIFY_BIND_DRIVER:
+                prd = kzalloc(sizeof(*prd), GFP_KERNEL);
                 if (prd) {
-                        devres_add(dev, prd);
+                        dev->power.subsys_data = prd;
                         dev->pwr_domain = &default_power_domain;
                 } else {
                         dev_err(dev, "unable to alloc memory for runtime pm\n");
                 }
+                break;
+        case BUS_NOTIFY_UNBOUND_DRIVER:
+                prd = __to_prd(dev);
+                if (prd) {
+                        if (test_bit(BIT_CLK_ENABLED, &prd->flags))
+                                clk_disable(prd->clk);
+
+                        if (test_bit(BIT_ACTIVE, &prd->flags))
+                                clk_put(prd->clk);
+                }
+                break;
         }
 
         return 0;