/* * drivers/base/power/clock_ops.c - Generic clock manipulation PM callbacks * * Copyright (c) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. * * This file is released under the GPLv2. */ #include <linux/kernel.h>#include <linux/device.h>#include <linux/io.h>#include <linux/pm.h>#include <linux/pm_clock.h>#include <linux/clk.h>#include <linux/clkdev.h>#include <linux/slab.h>#include <linux/err.h>#include <linux/pm_domain.h>#include <linux/pm_runtime.h> #ifdef CONFIG_PM_CLK enum pce_status { PCE_STATUS_NONE = 0, PCE_STATUS_ACQUIRED, PCE_STATUS_ENABLED, PCE_STATUS_ERROR,}; struct pm_clock_entry { struct list_head node; char *con_id; struct clk *clk; enum pce_status status;}; /** * pm_clk_enable - Enable a clock, reporting any errors * @dev: The device for the given clock * @ce: PM clock entry corresponding to the clock. */static inline void __pm_clk_enable(struct device *dev, struct pm_clock_entry *ce){ int ret; if (ce->status < PCE_STATUS_ERROR) { ret = clk_enable(ce->clk); if (!ret) ce->status = PCE_STATUS_ENABLED; else dev_err(dev, "%s: failed to enable clk %p, error %d\n", __func__, ce->clk, ret); }} /** * pm_clk_acquire - Acquire a device clock. * @dev: Device whose clock is to be acquired. * @ce: PM clock entry corresponding to the clock. */static void pm_clk_acquire(struct device *dev, struct pm_clock_entry *ce){ if (!ce->clk) ce->clk = clk_get(dev, ce->con_id); if (IS_ERR(ce->clk)) { ce->status = PCE_STATUS_ERROR; } else { clk_prepare(ce->clk); ce->status = PCE_STATUS_ACQUIRED; dev_dbg(dev, "Clock %pC con_id %s managed by runtime PM.\n", ce->clk, ce->con_id); }} static int __pm_clk_add(struct device *dev, const char *con_id, struct clk *clk){ struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; if (!psd) return -EINVAL; ce = kzalloc(sizeof(*ce), GFP_KERNEL); if (!ce) return -ENOMEM; if (con_id) { ce->con_id = kstrdup(con_id, GFP_KERNEL); if (!ce->con_id) { dev_err(dev, "Not enough memory for clock connection ID.\n"); kfree(ce); return -ENOMEM; } } else { if (IS_ERR(clk)) { kfree(ce); return -ENOENT; } ce->clk = clk; } pm_clk_acquire(dev, ce); spin_lock_irq(&psd->lock); list_add_tail(&ce->node, &psd->clock_list); spin_unlock_irq(&psd->lock); return 0;} /** * pm_clk_add - Start using a device clock for power management. * @dev: Device whose clock is going to be used for power management. * @con_id: Connection ID of the clock. * * Add the clock represented by @con_id to the list of clocks used for * the power management of @dev. */int pm_clk_add(struct device *dev, const char *con_id){ return __pm_clk_add(dev, con_id, NULL);}EXPORT_SYMBOL_GPL(pm_clk_add); /** * pm_clk_add_clk - Start using a device clock for power management. * @dev: Device whose clock is going to be used for power management. * @clk: Clock pointer * * Add the clock to the list of clocks used for the power management of @dev. * The power-management code will take control of the clock reference, so * callers should not call clk_put() on @clk after this function sucessfully * returned. */int pm_clk_add_clk(struct device *dev, struct clk *clk){ return __pm_clk_add(dev, NULL, clk);}EXPORT_SYMBOL_GPL(pm_clk_add_clk); /** * of_pm_clk_add_clk - Start using a device clock for power management. * @dev: Device whose clock is going to be used for power management. * @name: Name of clock that is going to be used for power management. * * Add the clock described in the 'clocks' device-tree node that matches * with the 'name' provided, to the list of clocks used for the power * management of @dev. On success, returns 0. Returns a negative error * code if the clock is not found or cannot be added. */int of_pm_clk_add_clk(struct device *dev, const char *name){ struct clk *clk; int ret; if (!dev || !dev->of_node || !name) return -EINVAL; clk = of_clk_get_by_name(dev->of_node, name); if (IS_ERR(clk)) return PTR_ERR(clk); ret = pm_clk_add_clk(dev, clk); if (ret) { clk_put(clk); return ret; } return 0;}EXPORT_SYMBOL_GPL(of_pm_clk_add_clk); /** * of_pm_clk_add_clks - Start using device clock(s) for power management. * @dev: Device whose clock(s) is going to be used for power management. * * Add a series of clocks described in the 'clocks' device-tree node for * a device to the list of clocks used for the power management of @dev. * On success, returns the number of clocks added. Returns a negative * error code if there are no clocks in the device node for the device * or if adding a clock fails. */int of_pm_clk_add_clks(struct device *dev){ struct clk **clks; unsigned int i, count; int ret; if (!dev || !dev->of_node) return -EINVAL; count = of_count_phandle_with_args(dev->of_node, "clocks", "#clock-cells"); if (count <= 0) return -ENODEV; clks = kcalloc(count, sizeof(*clks), GFP_KERNEL); if (!clks) return -ENOMEM; for (i = 0; i < count; i++) { clks[i] = of_clk_get(dev->of_node, i); if (IS_ERR(clks[i])) { ret = PTR_ERR(clks[i]); goto error; } ret = pm_clk_add_clk(dev, clks[i]); if (ret) { clk_put(clks[i]); goto error; } } kfree(clks); return i; error: while (i--) pm_clk_remove_clk(dev, clks[i]); kfree(clks); return ret;}EXPORT_SYMBOL_GPL(of_pm_clk_add_clks); /** * __pm_clk_remove - Destroy PM clock entry. * @ce: PM clock entry to destroy. */static void __pm_clk_remove(struct pm_clock_entry *ce){ if (!ce) return; if (ce->status < PCE_STATUS_ERROR) { if (ce->status == PCE_STATUS_ENABLED) clk_disable(ce->clk); if (ce->status >= PCE_STATUS_ACQUIRED) { clk_unprepare(ce->clk); clk_put(ce->clk); } } kfree(ce->con_id); kfree(ce);} /** * pm_clk_remove - Stop using a device clock for power management. * @dev: Device whose clock should not be used for PM any more. * @con_id: Connection ID of the clock. * * Remove the clock represented by @con_id from the list of clocks used for * the power management of @dev. */void pm_clk_remove(struct device *dev, const char *con_id){ struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; if (!psd) return; spin_lock_irq(&psd->lock); list_for_each_entry(ce, &psd->clock_list, node) { if (!con_id && !ce->con_id) goto remove; else if (!con_id || !ce->con_id) continue; else if (!strcmp(con_id, ce->con_id)) goto remove; } spin_unlock_irq(&psd->lock); return; remove: list_del(&ce->node); spin_unlock_irq(&psd->lock); __pm_clk_remove(ce);}EXPORT_SYMBOL_GPL(pm_clk_remove); /** * pm_clk_remove_clk - Stop using a device clock for power management. * @dev: Device whose clock should not be used for PM any more. * @clk: Clock pointer * * Remove the clock pointed to by @clk from the list of clocks used for * the power management of @dev. */void pm_clk_remove_clk(struct device *dev, struct clk *clk){ struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; if (!psd || !clk) return; spin_lock_irq(&psd->lock); list_for_each_entry(ce, &psd->clock_list, node) { if (clk == ce->clk) goto remove; } spin_unlock_irq(&psd->lock); return; remove: list_del(&ce->node); spin_unlock_irq(&psd->lock); __pm_clk_remove(ce);}EXPORT_SYMBOL_GPL(pm_clk_remove_clk); /** * pm_clk_init - Initialize a device's list of power management clocks. * @dev: Device to initialize the list of PM clocks for. * * Initialize the lock and clock_list members of the device's pm_subsys_data * object. */void pm_clk_init(struct device *dev){ struct pm_subsys_data *psd = dev_to_psd(dev); if (psd) INIT_LIST_HEAD(&psd->clock_list);}EXPORT_SYMBOL_GPL(pm_clk_init); /** * pm_clk_create - Create and initialize a device's list of PM clocks. * @dev: Device to create and initialize the list of PM clocks for. * * Allocate a struct pm_subsys_data object, initialize its lock and clock_list * members and make the @dev's power.subsys_data field point to it. */int pm_clk_create(struct device *dev){ return dev_pm_get_subsys_data(dev);}EXPORT_SYMBOL_GPL(pm_clk_create); /** * pm_clk_destroy - Destroy a device's list of power management clocks. * @dev: Device to destroy the list of PM clocks for. * * Clear the @dev's power.subsys_data field, remove the list of clock entries * from the struct pm_subsys_data object pointed to by it before and free * that object. */void pm_clk_destroy(struct device *dev){ struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce, *c; struct list_head list; if (!psd) return; INIT_LIST_HEAD(&list); spin_lock_irq(&psd->lock); list_for_each_entry_safe_reverse(ce, c, &psd->clock_list, node) list_move(&ce->node, &list); spin_unlock_irq(&psd->lock); dev_pm_put_subsys_data(dev); list_for_each_entry_safe_reverse(ce, c, &list, node) { list_del(&ce->node); __pm_clk_remove(ce); }}EXPORT_SYMBOL_GPL(pm_clk_destroy); /** * pm_clk_suspend - Disable clocks in a device's PM clock list. * @dev: Device to disable the clocks for. */int pm_clk_suspend(struct device *dev){ struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; unsigned long flags; dev_dbg(dev, "%s()\n", __func__); if (!psd) return 0; spin_lock_irqsave(&psd->lock, flags); list_for_each_entry_reverse(ce, &psd->clock_list, node) { if (ce->status < PCE_STATUS_ERROR) { if (ce->status == PCE_STATUS_ENABLED) clk_disable(ce->clk); ce->status = PCE_STATUS_ACQUIRED; } } spin_unlock_irqrestore(&psd->lock, flags); return 0;}EXPORT_SYMBOL_GPL(pm_clk_suspend); /** * pm_clk_resume - Enable clocks in a device's PM clock list. * @dev: Device to enable the clocks for. */int pm_clk_resume(struct device *dev){ struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; unsigned long flags; dev_dbg(dev, "%s()\n", __func__); if (!psd) return 0; spin_lock_irqsave(&psd->lock, flags); list_for_each_entry(ce, &psd->clock_list, node) __pm_clk_enable(dev, ce); spin_unlock_irqrestore(&psd->lock, flags); return 0;}EXPORT_SYMBOL_GPL(pm_clk_resume); /** * pm_clk_notify - Notify routine for device addition and removal. * @nb: Notifier block object this function is a member of. * @action: Operation being carried out by the caller. * @data: Device the routine is being run for. * * For this function to work, @nb must be a member of an object of type * struct pm_clk_notifier_block containing all of the requisite data. * Specifically, the pm_domain member of that object is copied to the device's * pm_domain field and its con_ids member is used to populate the device's list * of PM clocks, depending on @action. * * If the device's pm_domain field is already populated with a value different * from the one stored in the struct pm_clk_notifier_block object, the function * does nothing. */static int pm_clk_notify(struct notifier_block *nb, unsigned long action, void *data){ struct pm_clk_notifier_block *clknb; struct device *dev = data; char **con_id; int error; dev_dbg(dev, "%s() %ld\n", __func__, action); clknb = container_of(nb, struct pm_clk_notifier_block, nb); switch (action) { case BUS_NOTIFY_ADD_DEVICE: if (dev->pm_domain) break; error = pm_clk_create(dev); if (error) break; dev_pm_domain_set(dev, clknb->pm_domain); if (clknb->con_ids[0]) { for (con_id = clknb->con_ids; *con_id; con_id++) pm_clk_add(dev, *con_id); } else { pm_clk_add(dev, NULL); } break; case BUS_NOTIFY_DEL_DEVICE: if (dev->pm_domain != clknb->pm_domain) break; dev_pm_domain_set(dev, NULL); pm_clk_destroy(dev); break; } Lines 1–500 of 645. 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/* * drivers/base/power/clock_ops.c - Generic clock manipulation PM callbacks * * Copyright (c) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. * * This file is released under the GPLv2. */ #include <linux/kernel.h> #include <linux/device.h> #include <linux/io.h> #include <linux/pm.h> #include <linux/pm_clock.h> #include <linux/clk.h> #include <linux/clkdev.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/pm_domain.h> #include <linux/pm_runtime.h> #ifdef CONFIG_PM_CLK enum pce_status { PCE_STATUS_NONE = 0, PCE_STATUS_ACQUIRED, PCE_STATUS_ENABLED, PCE_STATUS_ERROR, }; struct pm_clock_entry { struct list_head node; char *con_id; struct clk *clk; enum pce_status status; }; /** * pm_clk_enable - Enable a clock, reporting any errors * @dev: The device for the given clock * @ce: PM clock entry corresponding to the clock. */ static inline void __pm_clk_enable(struct device *dev, struct pm_clock_entry *ce) { int ret; if (ce->status < PCE_STATUS_ERROR) { ret = clk_enable(ce->clk); if (!ret) ce->status = PCE_STATUS_ENABLED; else dev_err(dev, "%s: failed to enable clk %p, error %d\n", __func__, ce->clk, ret); } } /** * pm_clk_acquire - Acquire a device clock. * @dev: Device whose clock is to be acquired. * @ce: PM clock entry corresponding to the clock. */ static void pm_clk_acquire(struct device *dev, struct pm_clock_entry *ce) { if (!ce->clk) ce->clk = clk_get(dev, ce->con_id); if (IS_ERR(ce->clk)) { ce->status = PCE_STATUS_ERROR; } else { clk_prepare(ce->clk); ce->status = PCE_STATUS_ACQUIRED; dev_dbg(dev, "Clock %pC con_id %s managed by runtime PM.\n", ce->clk, ce->con_id); } } static int __pm_clk_add(struct device *dev, const char *con_id, struct clk *clk) { struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; if (!psd) return -EINVAL; ce = kzalloc(sizeof(*ce), GFP_KERNEL); if (!ce) return -ENOMEM; if (con_id) { ce->con_id = kstrdup(con_id, GFP_KERNEL); if (!ce->con_id) { dev_err(dev, "Not enough memory for clock connection ID.\n"); kfree(ce); return -ENOMEM; } } else { if (IS_ERR(clk)) { kfree(ce); return -ENOENT; } ce->clk = clk; } pm_clk_acquire(dev, ce); spin_lock_irq(&psd->lock); list_add_tail(&ce->node, &psd->clock_list); spin_unlock_irq(&psd->lock); return 0; } /** * pm_clk_add - Start using a device clock for power management. * @dev: Device whose clock is going to be used for power management. * @con_id: Connection ID of the clock. * * Add the clock represented by @con_id to the list of clocks used for * the power management of @dev. */ int pm_clk_add(struct device *dev, const char *con_id) { return __pm_clk_add(dev, con_id, NULL); } EXPORT_SYMBOL_GPL(pm_clk_add); /** * pm_clk_add_clk - Start using a device clock for power management. * @dev: Device whose clock is going to be used for power management. * @clk: Clock pointer * * Add the clock to the list of clocks used for the power management of @dev. * The power-management code will take control of the clock reference, so * callers should not call clk_put() on @clk after this function sucessfully * returned. */ int pm_clk_add_clk(struct device *dev, struct clk *clk) { return __pm_clk_add(dev, NULL, clk); } EXPORT_SYMBOL_GPL(pm_clk_add_clk); /** * of_pm_clk_add_clk - Start using a device clock for power management. * @dev: Device whose clock is going to be used for power management. * @name: Name of clock that is going to be used for power management. * * Add the clock described in the 'clocks' device-tree node that matches * with the 'name' provided, to the list of clocks used for the power * management of @dev. On success, returns 0. Returns a negative error * code if the clock is not found or cannot be added. */ int of_pm_clk_add_clk(struct device *dev, const char *name) { struct clk *clk; int ret; if (!dev || !dev->of_node || !name) return -EINVAL; clk = of_clk_get_by_name(dev->of_node, name); if (IS_ERR(clk)) return PTR_ERR(clk); ret = pm_clk_add_clk(dev, clk); if (ret) { clk_put(clk); return ret; } return 0; } EXPORT_SYMBOL_GPL(of_pm_clk_add_clk); /** * of_pm_clk_add_clks - Start using device clock(s) for power management. * @dev: Device whose clock(s) is going to be used for power management. * * Add a series of clocks described in the 'clocks' device-tree node for * a device to the list of clocks used for the power management of @dev. * On success, returns the number of clocks added. Returns a negative * error code if there are no clocks in the device node for the device * or if adding a clock fails. */ int of_pm_clk_add_clks(struct device *dev) { struct clk **clks; unsigned int i, count; int ret; if (!dev || !dev->of_node) return -EINVAL; count = of_count_phandle_with_args(dev->of_node, "clocks", "#clock-cells"); if (count <= 0) return -ENODEV; clks = kcalloc(count, sizeof(*clks), GFP_KERNEL); if (!clks) return -ENOMEM; for (i = 0; i < count; i++) { clks[i] = of_clk_get(dev->of_node, i); if (IS_ERR(clks[i])) { ret = PTR_ERR(clks[i]); goto error; } ret = pm_clk_add_clk(dev, clks[i]); if (ret) { clk_put(clks[i]); goto error; } } kfree(clks); return i; error: while (i--) pm_clk_remove_clk(dev, clks[i]); kfree(clks); return ret; } EXPORT_SYMBOL_GPL(of_pm_clk_add_clks); /** * __pm_clk_remove - Destroy PM clock entry. * @ce: PM clock entry to destroy. */ static void __pm_clk_remove(struct pm_clock_entry *ce) { if (!ce) return; if (ce->status < PCE_STATUS_ERROR) { if (ce->status == PCE_STATUS_ENABLED) clk_disable(ce->clk); if (ce->status >= PCE_STATUS_ACQUIRED) { clk_unprepare(ce->clk); clk_put(ce->clk); } } kfree(ce->con_id); kfree(ce); } /** * pm_clk_remove - Stop using a device clock for power management. * @dev: Device whose clock should not be used for PM any more. * @con_id: Connection ID of the clock. * * Remove the clock represented by @con_id from the list of clocks used for * the power management of @dev. */ void pm_clk_remove(struct device *dev, const char *con_id) { struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; if (!psd) return; spin_lock_irq(&psd->lock); list_for_each_entry(ce, &psd->clock_list, node) { if (!con_id && !ce->con_id) goto remove; else if (!con_id || !ce->con_id) continue; else if (!strcmp(con_id, ce->con_id)) goto remove; } spin_unlock_irq(&psd->lock); return; remove: list_del(&ce->node); spin_unlock_irq(&psd->lock); __pm_clk_remove(ce); } EXPORT_SYMBOL_GPL(pm_clk_remove); /** * pm_clk_remove_clk - Stop using a device clock for power management. * @dev: Device whose clock should not be used for PM any more. * @clk: Clock pointer * * Remove the clock pointed to by @clk from the list of clocks used for * the power management of @dev. */ void pm_clk_remove_clk(struct device *dev, struct clk *clk) { struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; if (!psd || !clk) return; spin_lock_irq(&psd->lock); list_for_each_entry(ce, &psd->clock_list, node) { if (clk == ce->clk) goto remove; } spin_unlock_irq(&psd->lock); return; remove: list_del(&ce->node); spin_unlock_irq(&psd->lock); __pm_clk_remove(ce); } EXPORT_SYMBOL_GPL(pm_clk_remove_clk); /** * pm_clk_init - Initialize a device's list of power management clocks. * @dev: Device to initialize the list of PM clocks for. * * Initialize the lock and clock_list members of the device's pm_subsys_data * object. */ void pm_clk_init(struct device *dev) { struct pm_subsys_data *psd = dev_to_psd(dev); if (psd) INIT_LIST_HEAD(&psd->clock_list); } EXPORT_SYMBOL_GPL(pm_clk_init); /** * pm_clk_create - Create and initialize a device's list of PM clocks. * @dev: Device to create and initialize the list of PM clocks for. * * Allocate a struct pm_subsys_data object, initialize its lock and clock_list * members and make the @dev's power.subsys_data field point to it. */ int pm_clk_create(struct device *dev) { return dev_pm_get_subsys_data(dev); } EXPORT_SYMBOL_GPL(pm_clk_create); /** * pm_clk_destroy - Destroy a device's list of power management clocks. * @dev: Device to destroy the list of PM clocks for. * * Clear the @dev's power.subsys_data field, remove the list of clock entries * from the struct pm_subsys_data object pointed to by it before and free * that object. */ void pm_clk_destroy(struct device *dev) { struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce, *c; struct list_head list; if (!psd) return; INIT_LIST_HEAD(&list); spin_lock_irq(&psd->lock); list_for_each_entry_safe_reverse(ce, c, &psd->clock_list, node) list_move(&ce->node, &list); spin_unlock_irq(&psd->lock); dev_pm_put_subsys_data(dev); list_for_each_entry_safe_reverse(ce, c, &list, node) { list_del(&ce->node); __pm_clk_remove(ce); } } EXPORT_SYMBOL_GPL(pm_clk_destroy); /** * pm_clk_suspend - Disable clocks in a device's PM clock list. * @dev: Device to disable the clocks for. */ int pm_clk_suspend(struct device *dev) { struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; unsigned long flags; dev_dbg(dev, "%s()\n", __func__); if (!psd) return 0; spin_lock_irqsave(&psd->lock, flags); list_for_each_entry_reverse(ce, &psd->clock_list, node) { if (ce->status < PCE_STATUS_ERROR) { if (ce->status == PCE_STATUS_ENABLED) clk_disable(ce->clk); ce->status = PCE_STATUS_ACQUIRED; } } spin_unlock_irqrestore(&psd->lock, flags); return 0; } EXPORT_SYMBOL_GPL(pm_clk_suspend); /** * pm_clk_resume - Enable clocks in a device's PM clock list. * @dev: Device to enable the clocks for. */ int pm_clk_resume(struct device *dev) { struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; unsigned long flags; dev_dbg(dev, "%s()\n", __func__); if (!psd) return 0; spin_lock_irqsave(&psd->lock, flags); list_for_each_entry(ce, &psd->clock_list, node) __pm_clk_enable(dev, ce); spin_unlock_irqrestore(&psd->lock, flags); return 0; } EXPORT_SYMBOL_GPL(pm_clk_resume); /** * pm_clk_notify - Notify routine for device addition and removal. * @nb: Notifier block object this function is a member of. * @action: Operation being carried out by the caller. * @data: Device the routine is being run for. * * For this function to work, @nb must be a member of an object of type * struct pm_clk_notifier_block containing all of the requisite data. * Specifically, the pm_domain member of that object is copied to the device's * pm_domain field and its con_ids member is used to populate the device's list * of PM clocks, depending on @action. * * If the device's pm_domain field is already populated with a value different * from the one stored in the struct pm_clk_notifier_block object, the function * does nothing. */ static int pm_clk_notify(struct notifier_block *nb, unsigned long action, void *data) { struct pm_clk_notifier_block *clknb; struct device *dev = data; char **con_id; int error; dev_dbg(dev, "%s() %ld\n", __func__, action); clknb = container_of(nb, struct pm_clk_notifier_block, nb); switch (action) { case BUS_NOTIFY_ADD_DEVICE: if (dev->pm_domain) break; error = pm_clk_create(dev); if (error) break; dev_pm_domain_set(dev, clknb->pm_domain); if (clknb->con_ids[0]) { for (con_id = clknb->con_ids; *con_id; con_id++) pm_clk_add(dev, *con_id); } else { pm_clk_add(dev, NULL); } break; case BUS_NOTIFY_DEL_DEVICE: if (dev->pm_domain != clknb->pm_domain) break; dev_pm_domain_set(dev, NULL); pm_clk_destroy(dev); break; }