diff options
| -rw-r--r-- | arch/sh/include/asm/device.h | 9 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/shmobile/Makefile | 3 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/shmobile/pm_runtime.c | 319 | ||||
| -rw-r--r-- | drivers/sh/Makefile | 12 |
4 files changed, 1 insertions, 342 deletions
diff --git a/arch/sh/include/asm/device.h b/arch/sh/include/asm/device.h index b16debf..783ecdc 100644 --- a/arch/sh/include/asm/device.h +++ b/arch/sh/include/asm/device.h @@ -14,15 +14,6 @@ int platform_resource_setup_memory(struct platform_device *pdev, void plat_early_device_setup(void); -#define PDEV_ARCHDATA_FLAG_INIT 0 -#define PDEV_ARCHDATA_FLAG_IDLE 1 -#define PDEV_ARCHDATA_FLAG_SUSP 2 - struct pdev_archdata { int hwblk_id; -#ifdef CONFIG_PM_RUNTIME - unsigned long flags; - struct list_head entry; - struct mutex mutex; -#endif }; diff --git a/arch/sh/kernel/cpu/shmobile/Makefile b/arch/sh/kernel/cpu/shmobile/Makefile index 7eb4502..e8a5111 100644 --- a/arch/sh/kernel/cpu/shmobile/Makefile +++ b/arch/sh/kernel/cpu/shmobile/Makefile @@ -5,6 +5,3 @@ # Power Management & Sleep mode obj-$(CONFIG_PM) += pm.o sleep.o obj-$(CONFIG_CPU_IDLE) += cpuidle.o -ifneq ($(CONFIG_CPU_SUBTYPE_SH7722)$(CONFIG_CPU_SUBTYPE_SH7723)$(CONFIG_CPU_SUBTYPE_SH7724),y) -obj-$(CONFIG_PM_RUNTIME) += pm_runtime.o -endif diff --git a/arch/sh/kernel/cpu/shmobile/pm_runtime.c b/arch/sh/kernel/cpu/shmobile/pm_runtime.c deleted file mode 100644 index bf280c8..0000000 --- a/arch/sh/kernel/cpu/shmobile/pm_runtime.c +++ /dev/null @@ -1,319 +0,0 @@ -/* - * arch/sh/kernel/cpu/shmobile/pm_runtime.c - * - * Runtime PM support code for SuperH Mobile - * - * Copyright (C) 2009 Magnus Damm - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/io.h> -#include <linux/pm_runtime.h> -#include <linux/platform_device.h> -#include <linux/mutex.h> -#include <asm/hwblk.h> - -static DEFINE_SPINLOCK(hwblk_lock); -static LIST_HEAD(hwblk_idle_list); -static struct work_struct hwblk_work; - -extern struct hwblk_info *hwblk_info; - -static void platform_pm_runtime_not_idle(struct platform_device *pdev) -{ - unsigned long flags; - - /* remove device from idle list */ - spin_lock_irqsave(&hwblk_lock, flags); - if (test_bit(PDEV_ARCHDATA_FLAG_IDLE, &pdev->archdata.flags)) { - list_del(&pdev->archdata.entry); - __clear_bit(PDEV_ARCHDATA_FLAG_IDLE, &pdev->archdata.flags); - } - spin_unlock_irqrestore(&hwblk_lock, flags); -} - -static int __platform_pm_runtime_resume(struct platform_device *pdev) -{ - struct device *d = &pdev->dev; - struct pdev_archdata *ad = &pdev->archdata; - int hwblk = ad->hwblk_id; - int ret = -ENOSYS; - - dev_dbg(d, "__platform_pm_runtime_resume() [%d]\n", hwblk); - - if (d->driver) { - hwblk_enable(hwblk_info, hwblk); - ret = 0; - - if (test_bit(PDEV_ARCHDATA_FLAG_SUSP, &ad->flags)) { - if (d->driver->pm && d->driver->pm->runtime_resume) - ret = d->driver->pm->runtime_resume(d); - - if (!ret) - clear_bit(PDEV_ARCHDATA_FLAG_SUSP, &ad->flags); - else - hwblk_disable(hwblk_info, hwblk); - } - } - - dev_dbg(d, "__platform_pm_runtime_resume() [%d] - returns %d\n", - hwblk, ret); - - return ret; -} - -static int __platform_pm_runtime_suspend(struct platform_device *pdev) -{ - struct device *d = &pdev->dev; - struct pdev_archdata *ad = &pdev->archdata; - int hwblk = ad->hwblk_id; - int ret = -ENOSYS; - - dev_dbg(d, "__platform_pm_runtime_suspend() [%d]\n", hwblk); - - if (d->driver) { - BUG_ON(!test_bit(PDEV_ARCHDATA_FLAG_IDLE, &ad->flags)); - ret = 0; - - if (d->driver->pm && d->driver->pm->runtime_suspend) { - hwblk_enable(hwblk_info, hwblk); - ret = d->driver->pm->runtime_suspend(d); - hwblk_disable(hwblk_info, hwblk); - } - - if (!ret) { - set_bit(PDEV_ARCHDATA_FLAG_SUSP, &ad->flags); - platform_pm_runtime_not_idle(pdev); - hwblk_cnt_dec(hwblk_info, hwblk, HWBLK_CNT_IDLE); - } - } - - dev_dbg(d, "__platform_pm_runtime_suspend() [%d] - returns %d\n", - hwblk, ret); - - return ret; -} - -static void platform_pm_runtime_work(struct work_struct *work) -{ - struct platform_device *pdev; - unsigned long flags; - int ret; - - /* go through the idle list and suspend one device at a time */ - do { - spin_lock_irqsave(&hwblk_lock, flags); - if (list_empty(&hwblk_idle_list)) - pdev = NULL; - else - pdev = list_first_entry(&hwblk_idle_list, - struct platform_device, - archdata.entry); - spin_unlock_irqrestore(&hwblk_lock, flags); - - if (pdev) { - mutex_lock(&pdev->archdata.mutex); - ret = __platform_pm_runtime_suspend(pdev); - - /* at this point the platform device may be: - * suspended: ret = 0, FLAG_SUSP set, clock stopped - * failed: ret < 0, FLAG_IDLE set, clock stopped - */ - mutex_unlock(&pdev->archdata.mutex); - } else { - ret = -ENODEV; - } - } while (!ret); -} - -/* this function gets called from cpuidle context when all devices in the - * main power domain are unused but some are counted as idle, ie the hwblk - * counter values are (HWBLK_CNT_USAGE == 0) && (HWBLK_CNT_IDLE != 0) - */ -void platform_pm_runtime_suspend_idle(void) -{ - queue_work(pm_wq, &hwblk_work); -} - -static int default_platform_runtime_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct pdev_archdata *ad = &pdev->archdata; - unsigned long flags; - int hwblk = ad->hwblk_id; - int ret = 0; - - dev_dbg(dev, "%s() [%d]\n", __func__, hwblk); - - /* ignore off-chip platform devices */ - if (!hwblk) - goto out; - - /* interrupt context not allowed */ - might_sleep(); - - /* catch misconfigured drivers not starting with resume */ - if (test_bit(PDEV_ARCHDATA_FLAG_INIT, &ad->flags)) { - ret = -EINVAL; - goto out; - } - - /* serialize */ - mutex_lock(&ad->mutex); - - /* disable clock */ - hwblk_disable(hwblk_info, hwblk); - - /* put device on idle list */ - spin_lock_irqsave(&hwblk_lock, flags); - list_add_tail(&ad->entry, &hwblk_idle_list); - __set_bit(PDEV_ARCHDATA_FLAG_IDLE, &ad->flags); - spin_unlock_irqrestore(&hwblk_lock, flags); - - /* increase idle count */ - hwblk_cnt_inc(hwblk_info, hwblk, HWBLK_CNT_IDLE); - - /* at this point the platform device is: - * idle: ret = 0, FLAG_IDLE set, clock stopped - */ - mutex_unlock(&ad->mutex); - -out: - dev_dbg(dev, "%s() [%d] returns %d\n", - __func__, hwblk, ret); - - return ret; -} - -static int default_platform_runtime_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct pdev_archdata *ad = &pdev->archdata; - int hwblk = ad->hwblk_id; - int ret = 0; - - dev_dbg(dev, "%s() [%d]\n", __func__, hwblk); - - /* ignore off-chip platform devices */ - if (!hwblk) - goto out; - - /* interrupt context not allowed */ - might_sleep(); - - /* serialize */ - mutex_lock(&ad->mutex); - - /* make sure device is removed from idle list */ - platform_pm_runtime_not_idle(pdev); - - /* decrease idle count */ - if (!test_bit(PDEV_ARCHDATA_FLAG_INIT, &pdev->archdata.flags) && - !test_bit(PDEV_ARCHDATA_FLAG_SUSP, &pdev->archdata.flags)) - hwblk_cnt_dec(hwblk_info, hwblk, HWBLK_CNT_IDLE); - - /* resume the device if needed */ - ret = __platform_pm_runtime_resume(pdev); - - /* the driver has been initialized now, so clear the init flag */ - clear_bit(PDEV_ARCHDATA_FLAG_INIT, &pdev->archdata.flags); - - /* at this point the platform device may be: - * resumed: ret = 0, flags = 0, clock started - * failed: ret < 0, FLAG_SUSP set, clock stopped - */ - mutex_unlock(&ad->mutex); -out: - dev_dbg(dev, "%s() [%d] returns %d\n", - __func__, hwblk, ret); - - return ret; -} - -static int default_platform_runtime_idle(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - int hwblk = pdev->archdata.hwblk_id; - int ret = 0; - - dev_dbg(dev, "%s() [%d]\n", __func__, hwblk); - - /* ignore off-chip platform devices */ - if (!hwblk) - goto out; - - /* interrupt context not allowed, use pm_runtime_put()! */ - might_sleep(); - - /* suspend synchronously to disable clocks immediately */ - ret = pm_runtime_suspend(dev); -out: - dev_dbg(dev, "%s() [%d] done!\n", __func__, hwblk); - return ret; -} - -static struct dev_pm_domain default_pm_domain = { - .ops = { - .runtime_suspend = default_platform_runtime_suspend, - .runtime_resume = default_platform_runtime_resume, - .runtime_idle = default_platform_runtime_idle, - USE_PLATFORM_PM_SLEEP_OPS - }, -}; - -static int platform_bus_notify(struct notifier_block *nb, - unsigned long action, void *data) -{ - struct device *dev = data; - struct platform_device *pdev = to_platform_device(dev); - int hwblk = pdev->archdata.hwblk_id; - - /* ignore off-chip platform devices */ - if (!hwblk) - return 0; - - switch (action) { - case BUS_NOTIFY_ADD_DEVICE: - INIT_LIST_HEAD(&pdev->archdata.entry); - mutex_init(&pdev->archdata.mutex); - /* platform devices without drivers should be disabled */ - hwblk_enable(hwblk_info, hwblk); - hwblk_disable(hwblk_info, hwblk); - /* make sure driver re-inits itself once */ - __set_bit(PDEV_ARCHDATA_FLAG_INIT, &pdev->archdata.flags); - dev->pm_domain = &default_pm_domain; - break; - /* TODO: add BUS_NOTIFY_BIND_DRIVER and increase idle count */ - case BUS_NOTIFY_BOUND_DRIVER: - /* keep track of number of devices in use per hwblk */ - hwblk_cnt_inc(hwblk_info, hwblk, HWBLK_CNT_DEVICES); - break; - case BUS_NOTIFY_UNBOUND_DRIVER: - /* keep track of number of devices in use per hwblk */ - hwblk_cnt_dec(hwblk_info, hwblk, HWBLK_CNT_DEVICES); - /* make sure driver re-inits itself once */ - __set_bit(PDEV_ARCHDATA_FLAG_INIT, &pdev->archdata.flags); - break; - case BUS_NOTIFY_DEL_DEVICE: - dev->pm_domain = NULL; - break; - } - return 0; -} - -static struct notifier_block platform_bus_notifier = { - .notifier_call = platform_bus_notify -}; - -static int __init sh_pm_runtime_init(void) -{ - INIT_WORK(&hwblk_work, platform_pm_runtime_work); - - bus_register_notifier(&platform_bus_type, &platform_bus_notifier); - return 0; -} -core_initcall(sh_pm_runtime_init); diff --git a/drivers/sh/Makefile b/drivers/sh/Makefile index 51f171b..c393894 100644 --- a/drivers/sh/Makefile +++ b/drivers/sh/Makefile @@ -7,14 +7,4 @@ obj-$(CONFIG_HAVE_CLK) += clk/ obj-$(CONFIG_MAPLE) += maple/ obj-$(CONFIG_SUPERHYWAY) += superhyway/ obj-$(CONFIG_GENERIC_GPIO) += pfc.o - -# -# For the moment we only use this framework for ARM-based SH/R-Mobile -# platforms and generic SH. SH-based SH-Mobile platforms are still using -# an older framework that is pending up-porting, at which point this -# special casing can go away. -# -obj-$(CONFIG_SUPERH)$(CONFIG_ARCH_SHMOBILE) += pm_runtime.o -obj-$(CONFIG_CPU_SUBTYPE_SH7722) += pm_runtime.o -obj-$(CONFIG_CPU_SUBTYPE_SH7723) += pm_runtime.o -obj-$(CONFIG_CPU_SUBTYPE_SH7724) += pm_runtime.o +obj-$(CONFIG_PM_RUNTIME) += pm_runtime.o |
