diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-04-29 00:36:53 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-04-29 00:36:53 +0200 |
| commit | 1d2b71f61b6a10216274e27b717becf9ae101fc7 (patch) | |
| tree | 9a2c7c3411cfcf485f17fec985c646ee90390d02 | |
| parent | 638080c37ae08fd0c44cec13d7948ca5385ae851 (diff) | |
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>
| -rw-r--r-- | arch/arm/mach-shmobile/pm_runtime.c | 34 | ||||
| -rw-r--r-- | include/linux/pm.h | 1 |
2 files changed, 18 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; diff --git a/include/linux/pm.h b/include/linux/pm.h index 512e09177e57..f4167d0faa67 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -460,6 +460,7 @@ struct dev_pm_info { unsigned long active_jiffies; unsigned long suspended_jiffies; unsigned long accounting_timestamp; + void *subsys_data; /* Owned by the subsystem. */ #endif }; |