Commit 1d2b71f6 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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: default avatarRafael J. Wysocki <rjw@sisk.pl>
parent 638080c3

arch/arm/mach-shmobile/pm_runtime.c

+17 −17
Original line number Diff line number Diff line
@@ -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;

include/linux/pm.h

+1 −0
Original line number Diff line number Diff line
@@ -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

};

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