Lines Matching +full:warn +full:- +full:soc +full:- +full:level

1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2010-2011 Canonical Ltd <jeremy.kerr@canonical.com>
4 * Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>
6 * Standard functionality for the common clock API. See Documentation/driver-api/clk.rst
10 #include <linux/clk-provider.h>
11 #include <linux/clk/clk-conf.h>
116 if (!core->rpm_enabled) in clk_pm_runtime_get()
119 return pm_runtime_resume_and_get(core->dev); in clk_pm_runtime_get()
124 if (!core->rpm_enabled) in clk_pm_runtime_put()
127 pm_runtime_put_sync(core->dev); in clk_pm_runtime_put()
131 * clk_pm_runtime_get_all() - Runtime "get" all clk provider devices
166 dev_name(failed->dev), failed->name); in clk_pm_runtime_get_all()
186 * clk_pm_runtime_put_all() - Runtime "put" all clk provider devices
202 struct device *dev = core->dev; in clk_pm_runtime_init()
205 core->rpm_enabled = true; in clk_pm_runtime_init()
208 hlist_add_head(&core->rpm_node, &clk_rpm_list); in clk_pm_runtime_init()
234 if (--prepare_refcnt) in clk_prepare_unlock()
274 if (--enable_refcnt) { in clk_enable_unlock()
284 return core->protect_count; in clk_core_rate_is_protected()
295 if (!core->ops->is_prepared) in clk_core_is_prepared()
296 return core->prepare_count; in clk_core_is_prepared()
299 ret = core->ops->is_prepared(core->hw); in clk_core_is_prepared()
314 if (!core->ops->is_enabled) in clk_core_is_enabled()
315 return core->enable_count; in clk_core_is_enabled()
327 if (core->rpm_enabled) { in clk_core_is_enabled()
328 pm_runtime_get_noresume(core->dev); in clk_core_is_enabled()
329 if (!pm_runtime_active(core->dev)) { in clk_core_is_enabled()
340 if ((core->flags & CLK_OPS_PARENT_ENABLE) && core->parent) in clk_core_is_enabled()
341 if (!clk_core_is_enabled(core->parent)) { in clk_core_is_enabled()
346 ret = core->ops->is_enabled(core->hw); in clk_core_is_enabled()
348 if (core->rpm_enabled) in clk_core_is_enabled()
349 pm_runtime_put(core->dev); in clk_core_is_enabled()
358 return !clk ? NULL : clk->core->name; in __clk_get_name()
364 return hw->core->name; in clk_hw_get_name()
370 return !clk ? NULL : clk->core->hw; in __clk_get_hw()
376 return hw->core->num_parents; in clk_hw_get_num_parents()
382 return hw->core->parent ? hw->core->parent->hw : NULL; in clk_hw_get_parent()
392 if (!strcmp(core->name, name)) in __clk_lookup_subtree()
395 hlist_for_each_entry(child, &core->children, child_node) { in __clk_lookup_subtree()
439 return -ENOENT; in of_parse_clkspec()
444 return ERR_PTR(-ENOENT); in of_clk_get_hw_from_clkspec()
449 * clk_core_get - Find the clk_core parent of a clk
456 * node's 'clock-names' property or as the 'con_id' matching the device's
461 * clock-controller@c001 that has a clk_init_data::parent_data array
463 * clock-controller@f00abcd without needing to get the globally unique name of
466 * parent: clock-controller@f00abcd {
468 * #clock-cells = <0>;
471 * clock-controller@c001 {
474 * clock-names = "xtal";
475 * #clock-cells = <1>;
478 * Returns: -ENOENT when the provider can't be found or the clk doesn't
486 const char *name = core->parents[p_index].fw_name; in clk_core_get()
487 int index = core->parents[p_index].index; in clk_core_get()
488 struct clk_hw *hw = ERR_PTR(-ENOENT); in clk_core_get()
489 struct device *dev = core->dev; in clk_core_get()
491 struct device_node *np = core->of_node; in clk_core_get()
512 return hw->core; in clk_core_get()
517 struct clk_parent_map *entry = &core->parents[index]; in clk_core_fill_parent_index()
520 if (entry->hw) { in clk_core_fill_parent_index()
521 parent = entry->hw->core; in clk_core_fill_parent_index()
524 if (PTR_ERR(parent) == -ENOENT && entry->name) in clk_core_fill_parent_index()
525 parent = clk_core_lookup(entry->name); in clk_core_fill_parent_index()
534 parent = ERR_PTR(-EPROBE_DEFER); in clk_core_fill_parent_index()
538 entry->core = parent; in clk_core_fill_parent_index()
544 if (!core || index >= core->num_parents || !core->parents) in clk_core_get_parent_by_index()
547 if (!core->parents[index].core) in clk_core_get_parent_by_index()
550 return core->parents[index].core; in clk_core_get_parent_by_index()
558 parent = clk_core_get_parent_by_index(hw->core, index); in clk_hw_get_parent_by_index()
560 return !parent ? NULL : parent->hw; in clk_hw_get_parent_by_index()
566 return !clk ? 0 : clk->core->enable_count; in __clk_get_enable_count()
574 if (!core->num_parents || core->parent) in clk_core_get_rate_nolock()
575 return core->rate; in clk_core_get_rate_nolock()
587 return clk_core_get_rate_nolock(hw->core); in clk_hw_get_rate()
596 return core->accuracy; in clk_core_get_accuracy_no_lock()
601 return hw->core->flags; in clk_hw_get_flags()
607 return clk_core_is_prepared(hw->core); in clk_hw_is_prepared()
613 return clk_core_is_enabled(hw->core); in clk_hw_is_enabled()
622 return clk_core_is_enabled(clk->core); in __clk_is_enabled()
630 return abs(now - rate) < abs(best - rate); in mux_is_better_rate()
648 if (core->parent == parent) in clk_core_has_parent()
651 for (i = 0; i < core->num_parents; i++) { in clk_core_has_parent()
675 if (req->min_rate < old_req->min_rate) in clk_core_forward_rate_req()
676 req->min_rate = old_req->min_rate; in clk_core_forward_rate_req()
678 if (req->max_rate > old_req->max_rate) in clk_core_forward_rate_req()
679 req->max_rate = old_req->max_rate; in clk_core_forward_rate_req()
686 struct clk_core *core = hw->core; in clk_core_determine_rate_no_reparent()
687 struct clk_core *parent = core->parent; in clk_core_determine_rate_no_reparent()
691 if (core->flags & CLK_SET_RATE_PARENT) { in clk_core_determine_rate_no_reparent()
695 req->rate = 0; in clk_core_determine_rate_no_reparent()
700 req->rate); in clk_core_determine_rate_no_reparent()
717 req->best_parent_rate = best; in clk_core_determine_rate_no_reparent()
718 req->rate = best; in clk_core_determine_rate_no_reparent()
727 struct clk_core *core = hw->core, *parent, *best_parent = NULL; in clk_mux_determine_rate_flags()
732 if (core->flags & CLK_SET_RATE_NO_REPARENT) in clk_mux_determine_rate_flags()
736 num_parents = core->num_parents; in clk_mux_determine_rate_flags()
744 if (core->flags & CLK_SET_RATE_PARENT) { in clk_mux_determine_rate_flags()
747 clk_core_forward_rate_req(core, req, parent, &parent_req, req->rate); in clk_mux_determine_rate_flags()
762 if (mux_is_better_rate(req->rate, parent_rate, in clk_mux_determine_rate_flags()
770 return -EINVAL; in clk_mux_determine_rate_flags()
772 req->best_parent_hw = best_parent->hw; in clk_mux_determine_rate_flags()
773 req->best_parent_rate = best; in clk_mux_determine_rate_flags()
774 req->rate = best; in clk_mux_determine_rate_flags()
784 return !core ? NULL : core->hw->clk; in __clk_lookup()
795 *min_rate = core->min_rate; in clk_core_get_boundaries()
796 *max_rate = core->max_rate; in clk_core_get_boundaries()
798 hlist_for_each_entry(clk_user, &core->clks, clks_node) in clk_core_get_boundaries()
799 *min_rate = max(*min_rate, clk_user->min_rate); in clk_core_get_boundaries()
801 hlist_for_each_entry(clk_user, &core->clks, clks_node) in clk_core_get_boundaries()
802 *max_rate = min(*max_rate, clk_user->max_rate); in clk_core_get_boundaries()
806 * clk_hw_get_rate_range() - returns the clock rate range for a hw clk
817 clk_core_get_boundaries(hw->core, min_rate, max_rate); in clk_hw_get_rate_range()
829 if (min_rate > core->max_rate || max_rate < core->min_rate) in clk_core_check_boundaries()
832 hlist_for_each_entry(user, &core->clks, clks_node) in clk_core_check_boundaries()
833 if (min_rate > user->max_rate || max_rate < user->min_rate) in clk_core_check_boundaries()
842 hw->core->min_rate = min_rate; in clk_hw_set_rate_range()
843 hw->core->max_rate = max_rate; in clk_hw_set_rate_range()
848 * __clk_mux_determine_rate - clk_ops::determine_rate implementation for a mux type clk
856 * Returns: 0 on success, -EERROR value on error
873 …* clk_hw_determine_rate_no_reparent - clk_ops::determine_rate implementation for a clk that doesn'…
882 * Returns: 0 on success, -EERROR value on error
900 if (WARN(core->protect_count == 0, in clk_core_rate_unprotect()
901 "%s already unprotected\n", core->name)) in clk_core_rate_unprotect()
904 if (--core->protect_count > 0) in clk_core_rate_unprotect()
907 clk_core_rate_unprotect(core->parent); in clk_core_rate_unprotect()
917 return -EINVAL; in clk_core_rate_nuke_protect()
919 if (core->protect_count == 0) in clk_core_rate_nuke_protect()
922 ret = core->protect_count; in clk_core_rate_nuke_protect()
923 core->protect_count = 1; in clk_core_rate_nuke_protect()
930 * clk_rate_exclusive_put - release exclusivity over clock rate control
958 if (WARN_ON(clk->exclusive_count <= 0)) in clk_rate_exclusive_put()
961 clk_core_rate_unprotect(clk->core); in clk_rate_exclusive_put()
962 clk->exclusive_count--; in clk_rate_exclusive_put()
975 if (core->protect_count == 0) in clk_core_rate_protect()
976 clk_core_rate_protect(core->parent); in clk_core_rate_protect()
978 core->protect_count++; in clk_core_rate_protect()
992 core->protect_count = count; in clk_core_rate_restore_protect()
996 * clk_rate_exclusive_get - get exclusivity over the clk rate control
1011 * Returns 0 on success, -EERROR otherwise
1019 clk_core_rate_protect(clk->core); in clk_rate_exclusive_get()
1020 clk->exclusive_count++; in clk_rate_exclusive_get()
1053 if (WARN(core->prepare_count == 0, in clk_core_unprepare()
1054 "%s already unprepared\n", core->name)) in clk_core_unprepare()
1057 if (WARN(core->prepare_count == 1 && core->flags & CLK_IS_CRITICAL, in clk_core_unprepare()
1058 "Unpreparing critical %s\n", core->name)) in clk_core_unprepare()
1061 if (core->flags & CLK_SET_RATE_GATE) in clk_core_unprepare()
1064 if (--core->prepare_count > 0) in clk_core_unprepare()
1067 WARN(core->enable_count > 0, "Unpreparing enabled %s\n", core->name); in clk_core_unprepare()
1071 if (core->ops->unprepare) in clk_core_unprepare()
1072 core->ops->unprepare(core->hw); in clk_core_unprepare()
1075 clk_core_unprepare(core->parent); in clk_core_unprepare()
1087 * clk_unprepare - undo preparation of a clock source
1102 clk_core_unprepare_lock(clk->core); in clk_unprepare()
1115 if (core->prepare_count == 0) { in clk_core_prepare()
1120 ret = clk_core_prepare(core->parent); in clk_core_prepare()
1126 if (core->ops->prepare) in clk_core_prepare()
1127 ret = core->ops->prepare(core->hw); in clk_core_prepare()
1135 core->prepare_count++; in clk_core_prepare()
1144 if (core->flags & CLK_SET_RATE_GATE) in clk_core_prepare()
1149 clk_core_unprepare(core->parent); in clk_core_prepare()
1167 * clk_prepare - prepare a clock source
1176 * Returns 0 on success, -EERROR otherwise.
1183 return clk_core_prepare_lock(clk->core); in clk_prepare()
1194 if (WARN(core->enable_count == 0, "%s already disabled\n", core->name)) in clk_core_disable()
1197 if (WARN(core->enable_count == 1 && core->flags & CLK_IS_CRITICAL, in clk_core_disable()
1198 "Disabling critical %s\n", core->name)) in clk_core_disable()
1201 if (--core->enable_count > 0) in clk_core_disable()
1206 if (core->ops->disable) in clk_core_disable()
1207 core->ops->disable(core->hw); in clk_core_disable()
1211 clk_core_disable(core->parent); in clk_core_disable()
1224 * clk_disable - gate a clock
1230 * SoC-internal clk which is controlled via simple register writes. In the
1240 clk_core_disable_lock(clk->core); in clk_disable()
1253 if (WARN(core->prepare_count == 0, in clk_core_enable()
1254 "Enabling unprepared %s\n", core->name)) in clk_core_enable()
1255 return -ESHUTDOWN; in clk_core_enable()
1257 if (core->enable_count == 0) { in clk_core_enable()
1258 ret = clk_core_enable(core->parent); in clk_core_enable()
1265 if (core->ops->enable) in clk_core_enable()
1266 ret = core->ops->enable(core->hw); in clk_core_enable()
1271 clk_core_disable(core->parent); in clk_core_enable()
1276 core->enable_count++; in clk_core_enable()
1293 * clk_gate_restore_context - restore context for poweroff
1304 struct clk_core *core = hw->core; in clk_gate_restore_context()
1306 if (core->enable_count) in clk_gate_restore_context()
1307 core->ops->enable(hw); in clk_gate_restore_context()
1309 core->ops->disable(hw); in clk_gate_restore_context()
1318 hlist_for_each_entry(child, &core->children, child_node) { in clk_core_save_context()
1324 if (core->ops && core->ops->save_context) in clk_core_save_context()
1325 ret = core->ops->save_context(core->hw); in clk_core_save_context()
1334 if (core->ops && core->ops->restore_context) in clk_core_restore_context()
1335 core->ops->restore_context(core->hw); in clk_core_restore_context()
1337 hlist_for_each_entry(child, &core->children, child_node) in clk_core_restore_context()
1342 * clk_save_context - save clock context for poweroff
1370 * clk_restore_context - restore clock context after poweroff
1388 * clk_enable - ungate a clock
1393 * if the operation will never sleep. One example is a SoC-internal clk which
1397 * must be called before clk_enable. Returns 0 on success, -EERROR
1405 return clk_core_enable_lock(clk->core); in clk_enable()
1410 * clk_is_enabled_when_prepared - indicate if preparing a clock also enables it.
1414 * making clk_enable()/clk_disable() no-ops, false otherwise.
1426 return clk && !(clk->core->ops->enable && clk->core->ops->disable); in clk_is_enabled_when_prepared()
1457 hlist_for_each_entry(child, &core->children, child_node) in clk_unprepare_unused_subtree()
1460 if (core->prepare_count) in clk_unprepare_unused_subtree()
1463 if (core->flags & CLK_IGNORE_UNUSED) in clk_unprepare_unused_subtree()
1468 if (core->ops->unprepare_unused) in clk_unprepare_unused_subtree()
1469 core->ops->unprepare_unused(core->hw); in clk_unprepare_unused_subtree()
1470 else if (core->ops->unprepare) in clk_unprepare_unused_subtree()
1471 core->ops->unprepare(core->hw); in clk_unprepare_unused_subtree()
1483 hlist_for_each_entry(child, &core->children, child_node) in clk_disable_unused_subtree()
1486 if (core->flags & CLK_OPS_PARENT_ENABLE) in clk_disable_unused_subtree()
1487 clk_core_prepare_enable(core->parent); in clk_disable_unused_subtree()
1491 if (core->enable_count) in clk_disable_unused_subtree()
1494 if (core->flags & CLK_IGNORE_UNUSED) in clk_disable_unused_subtree()
1498 * some gate clocks have special needs during the disable-unused in clk_disable_unused_subtree()
1504 if (core->ops->disable_unused) in clk_disable_unused_subtree()
1505 core->ops->disable_unused(core->hw); in clk_disable_unused_subtree()
1506 else if (core->ops->disable) in clk_disable_unused_subtree()
1507 core->ops->disable(core->hw); in clk_disable_unused_subtree()
1513 if (core->flags & CLK_OPS_PARENT_ENABLE) in clk_disable_unused_subtree()
1514 clk_core_disable_unprepare(core->parent); in clk_disable_unused_subtree()
1577 * Some clock providers hand-craft their clk_rate_requests and in clk_core_determine_round_nolock()
1584 if (!req->min_rate && !req->max_rate) in clk_core_determine_round_nolock()
1586 __func__, core->name); in clk_core_determine_round_nolock()
1588 req->rate = clamp(req->rate, req->min_rate, req->max_rate); in clk_core_determine_round_nolock()
1592 * - if the provider is not protected at all in clk_core_determine_round_nolock()
1593 * - if the calling consumer is the only one which has exclusivity in clk_core_determine_round_nolock()
1597 req->rate = core->rate; in clk_core_determine_round_nolock()
1598 } else if (core->ops->determine_rate) { in clk_core_determine_round_nolock()
1599 return core->ops->determine_rate(core->hw, req); in clk_core_determine_round_nolock()
1600 } else if (core->ops->round_rate) { in clk_core_determine_round_nolock()
1601 rate = core->ops->round_rate(core->hw, req->rate, in clk_core_determine_round_nolock()
1602 &req->best_parent_rate); in clk_core_determine_round_nolock()
1606 req->rate = rate; in clk_core_determine_round_nolock()
1608 return -EINVAL; in clk_core_determine_round_nolock()
1624 req->max_rate = ULONG_MAX; in clk_core_init_rate_req()
1629 req->core = core; in clk_core_init_rate_req()
1630 req->rate = rate; in clk_core_init_rate_req()
1631 clk_core_get_boundaries(core, &req->min_rate, &req->max_rate); in clk_core_init_rate_req()
1633 parent = core->parent; in clk_core_init_rate_req()
1635 req->best_parent_hw = parent->hw; in clk_core_init_rate_req()
1636 req->best_parent_rate = parent->rate; in clk_core_init_rate_req()
1638 req->best_parent_hw = NULL; in clk_core_init_rate_req()
1639 req->best_parent_rate = 0; in clk_core_init_rate_req()
1644 * clk_hw_init_rate_request - Initializes a clk_rate_request
1659 clk_core_init_rate_req(hw->core, req, rate); in clk_hw_init_rate_request()
1664 * clk_hw_forward_rate_request - Forwards a clk_rate_request to a clock's parent
1683 clk_core_forward_rate_req(hw->core, old_req, in clk_hw_forward_rate_request()
1684 parent->core, req, in clk_hw_forward_rate_request()
1691 return core->ops->determine_rate || core->ops->round_rate; in clk_core_can_round()
1702 req->rate = 0; in clk_core_round_rate_nolock()
1709 if (core->flags & CLK_SET_RATE_PARENT) { in clk_core_round_rate_nolock()
1712 clk_core_forward_rate_req(core, req, core->parent, &parent_req, req->rate); in clk_core_round_rate_nolock()
1716 ret = clk_core_round_rate_nolock(core->parent, &parent_req); in clk_core_round_rate_nolock()
1722 req->best_parent_rate = parent_req.rate; in clk_core_round_rate_nolock()
1723 req->rate = parent_req.rate; in clk_core_round_rate_nolock()
1728 req->rate = core->rate; in clk_core_round_rate_nolock()
1733 * __clk_determine_rate - get the closest rate actually supported by a clock
1742 req->rate = 0; in __clk_determine_rate()
1746 return clk_core_round_rate_nolock(hw->core, req); in __clk_determine_rate()
1751 * clk_hw_round_rate() - round the given rate for a hw clk
1770 clk_core_init_rate_req(hw->core, &req, rate); in clk_hw_round_rate()
1774 ret = clk_core_round_rate_nolock(hw->core, &req); in clk_hw_round_rate()
1785 * clk_round_rate - round the given rate for a clk
1803 if (clk->exclusive_count) in clk_round_rate()
1804 clk_core_rate_unprotect(clk->core); in clk_round_rate()
1806 clk_core_init_rate_req(clk->core, &req, rate); in clk_round_rate()
1810 ret = clk_core_round_rate_nolock(clk->core, &req); in clk_round_rate()
1814 if (clk->exclusive_count) in clk_round_rate()
1815 clk_core_rate_protect(clk->core); in clk_round_rate()
1827 * __clk_notify - call clk notifier chain
1833 * Triggers a notifier call chain on the clk rate-change notification
1851 if (cn->clk->core == core) { in __clk_notify()
1852 cnd.clk = cn->clk; in __clk_notify()
1853 ret = srcu_notifier_call_chain(&cn->notifier_head, msg, in __clk_notify()
1879 if (core->parent) in __clk_recalc_accuracies()
1880 parent_accuracy = core->parent->accuracy; in __clk_recalc_accuracies()
1882 if (core->ops->recalc_accuracy) in __clk_recalc_accuracies()
1883 core->accuracy = core->ops->recalc_accuracy(core->hw, in __clk_recalc_accuracies()
1886 core->accuracy = parent_accuracy; in __clk_recalc_accuracies()
1888 hlist_for_each_entry(child, &core->children, child_node) in __clk_recalc_accuracies()
1894 if (core && (core->flags & CLK_GET_ACCURACY_NOCACHE)) in clk_core_get_accuracy_recalc()
1901 * clk_get_accuracy - return the accuracy of clk
1917 accuracy = clk_core_get_accuracy_recalc(clk->core); in clk_get_accuracy()
1929 if (core->ops->recalc_rate && !clk_pm_runtime_get(core)) { in clk_recalc()
1930 rate = core->ops->recalc_rate(core->hw, parent_rate); in clk_recalc()
1958 old_rate = core->rate; in __clk_recalc_rates()
1960 if (core->parent) in __clk_recalc_rates()
1961 parent_rate = core->parent->rate; in __clk_recalc_rates()
1963 core->rate = clk_recalc(core, parent_rate); in __clk_recalc_rates()
1965 core->req_rate = core->rate; in __clk_recalc_rates()
1971 if (core->notifier_count && msg) in __clk_recalc_rates()
1972 __clk_notify(core, msg, old_rate, core->rate); in __clk_recalc_rates()
1974 hlist_for_each_entry(child, &core->children, child_node) in __clk_recalc_rates()
1980 if (core && (core->flags & CLK_GET_RATE_NOCACHE)) in clk_core_get_rate_recalc()
1987 * clk_get_rate - return the rate of clk
2003 rate = clk_core_get_rate_recalc(clk->core); in clk_get_rate()
2016 return -EINVAL; in clk_fetch_parent_index()
2018 for (i = 0; i < core->num_parents; i++) { in clk_fetch_parent_index()
2020 if (core->parents[i].core == parent) in clk_fetch_parent_index()
2024 if (core->parents[i].core) in clk_fetch_parent_index()
2028 if (core->parents[i].hw) { in clk_fetch_parent_index()
2029 if (core->parents[i].hw == parent->hw) in clk_fetch_parent_index()
2041 if (core->parents[i].name && in clk_fetch_parent_index()
2042 !strcmp(parent->name, core->parents[i].name)) in clk_fetch_parent_index()
2046 if (i == core->num_parents) in clk_fetch_parent_index()
2047 return -EINVAL; in clk_fetch_parent_index()
2049 core->parents[i].core = parent; in clk_fetch_parent_index()
2054 * clk_hw_get_parent_index - return the index of the parent clock
2057 * Fetches and returns the index of parent clock. Returns -EINVAL if the given
2065 return -EINVAL; in clk_hw_get_parent_index()
2067 return clk_fetch_parent_index(hw->core, parent->core); in clk_hw_get_parent_index()
2078 core->orphan = is_orphan; in clk_core_update_orphan_status()
2080 hlist_for_each_entry(child, &core->children, child_node) in clk_core_update_orphan_status()
2086 bool was_orphan = core->orphan; in clk_reparent()
2088 hlist_del(&core->child_node); in clk_reparent()
2091 bool becomes_orphan = new_parent->orphan; in clk_reparent()
2094 if (new_parent->new_child == core) in clk_reparent()
2095 new_parent->new_child = NULL; in clk_reparent()
2097 hlist_add_head(&core->child_node, &new_parent->children); in clk_reparent()
2102 hlist_add_head(&core->child_node, &clk_orphan_list); in clk_reparent()
2107 core->parent = new_parent; in clk_reparent()
2114 struct clk_core *old_parent = core->parent; in __clk_set_parent_before()
2137 if (core->flags & CLK_OPS_PARENT_ENABLE) { in __clk_set_parent_before()
2143 if (core->prepare_count) { in __clk_set_parent_before()
2164 if (core->prepare_count) { in __clk_set_parent_after()
2169 /* re-balance ref counting if CLK_OPS_PARENT_ENABLE is set */ in __clk_set_parent_after()
2170 if (core->flags & CLK_OPS_PARENT_ENABLE) { in __clk_set_parent_after()
2188 if (parent && core->ops->set_parent) in __clk_set_parent()
2189 ret = core->ops->set_parent(core->hw, p_index); in __clk_set_parent()
2217 * pre-rate change notifications and returns early if no clks in the
2234 if (core->notifier_count) in __clk_speculate_rates()
2235 ret = __clk_notify(core, PRE_RATE_CHANGE, core->rate, new_rate); in __clk_speculate_rates()
2239 __func__, core->name, ret); in __clk_speculate_rates()
2243 hlist_for_each_entry(child, &core->children, child_node) { in __clk_speculate_rates()
2258 core->new_rate = new_rate; in clk_calc_subtree()
2259 core->new_parent = new_parent; in clk_calc_subtree()
2260 core->new_parent_index = p_index; in clk_calc_subtree()
2262 core->new_child = NULL; in clk_calc_subtree()
2263 if (new_parent && new_parent != core->parent) in clk_calc_subtree()
2264 new_parent->new_child = core; in clk_calc_subtree()
2266 hlist_for_each_entry(child, &core->children, child_node) { in clk_calc_subtree()
2267 child->new_rate = clk_recalc(child, new_rate); in clk_calc_subtree()
2268 clk_calc_subtree(child, child->new_rate, NULL, 0); in clk_calc_subtree()
2293 parent = old_parent = core->parent; in clk_calc_new_rates()
2295 best_parent_rate = parent->rate; in clk_calc_new_rates()
2315 parent = req.best_parent_hw ? req.best_parent_hw->core : NULL; in clk_calc_new_rates()
2319 } else if (!parent || !(core->flags & CLK_SET_RATE_PARENT)) { in clk_calc_new_rates()
2320 /* pass-through clock without adjustable parent */ in clk_calc_new_rates()
2321 core->new_rate = core->rate; in clk_calc_new_rates()
2324 /* pass-through clock with adjustable parent */ in clk_calc_new_rates()
2326 new_rate = parent->new_rate; in clk_calc_new_rates()
2332 (core->flags & CLK_SET_PARENT_GATE) && core->prepare_count) { in clk_calc_new_rates()
2334 __func__, core->name); in clk_calc_new_rates()
2339 if (parent && core->num_parents > 1) { in clk_calc_new_rates()
2343 __func__, parent->name, core->name); in clk_calc_new_rates()
2348 if ((core->flags & CLK_SET_RATE_PARENT) && parent && in clk_calc_new_rates()
2349 best_parent_rate != parent->rate) in clk_calc_new_rates()
2369 if (core->rate == core->new_rate) in clk_propagate_rate_change()
2372 if (core->notifier_count) { in clk_propagate_rate_change()
2373 ret = __clk_notify(core, event, core->rate, core->new_rate); in clk_propagate_rate_change()
2378 hlist_for_each_entry(child, &core->children, child_node) { in clk_propagate_rate_change()
2380 if (child->new_parent && child->new_parent != core) in clk_propagate_rate_change()
2387 /* handle the new child who might not be in core->children yet */ in clk_propagate_rate_change()
2388 if (core->new_child) { in clk_propagate_rate_change()
2389 tmp_clk = clk_propagate_rate_change(core->new_child, event); in clk_propagate_rate_change()
2411 old_rate = core->rate; in clk_change_rate()
2413 if (core->new_parent) { in clk_change_rate()
2414 parent = core->new_parent; in clk_change_rate()
2415 best_parent_rate = core->new_parent->rate; in clk_change_rate()
2416 } else if (core->parent) { in clk_change_rate()
2417 parent = core->parent; in clk_change_rate()
2418 best_parent_rate = core->parent->rate; in clk_change_rate()
2424 if (core->flags & CLK_SET_RATE_UNGATE) { in clk_change_rate()
2429 if (core->new_parent && core->new_parent != core->parent) { in clk_change_rate()
2430 old_parent = __clk_set_parent_before(core, core->new_parent); in clk_change_rate()
2431 trace_clk_set_parent(core, core->new_parent); in clk_change_rate()
2433 if (core->ops->set_rate_and_parent) { in clk_change_rate()
2435 core->ops->set_rate_and_parent(core->hw, core->new_rate, in clk_change_rate()
2437 core->new_parent_index); in clk_change_rate()
2438 } else if (core->ops->set_parent) { in clk_change_rate()
2439 core->ops->set_parent(core->hw, core->new_parent_index); in clk_change_rate()
2442 trace_clk_set_parent_complete(core, core->new_parent); in clk_change_rate()
2443 __clk_set_parent_after(core, core->new_parent, old_parent); in clk_change_rate()
2446 if (core->flags & CLK_OPS_PARENT_ENABLE) in clk_change_rate()
2449 trace_clk_set_rate(core, core->new_rate); in clk_change_rate()
2451 if (!skip_set_rate && core->ops->set_rate) in clk_change_rate()
2452 core->ops->set_rate(core->hw, core->new_rate, best_parent_rate); in clk_change_rate()
2454 trace_clk_set_rate_complete(core, core->new_rate); in clk_change_rate()
2456 core->rate = clk_recalc(core, best_parent_rate); in clk_change_rate()
2458 if (core->flags & CLK_SET_RATE_UNGATE) { in clk_change_rate()
2463 if (core->flags & CLK_OPS_PARENT_ENABLE) in clk_change_rate()
2466 if (core->notifier_count && old_rate != core->rate) in clk_change_rate()
2467 __clk_notify(core, POST_RATE_CHANGE, old_rate, core->rate); in clk_change_rate()
2469 if (core->flags & CLK_RECALC_NEW_RATES) in clk_change_rate()
2470 (void)clk_calc_new_rates(core, core->new_rate); in clk_change_rate()
2476 hlist_for_each_entry_safe(child, tmp, &core->children, child_node) { in clk_change_rate()
2478 if (child->new_parent && child->new_parent != core) in clk_change_rate()
2483 /* handle the new child who might not be in core->children yet */ in clk_change_rate()
2484 if (core->new_child) in clk_change_rate()
2485 clk_change_rate(core->new_child); in clk_change_rate()
2538 return -EBUSY; in clk_core_set_rate_nolock()
2543 return -EINVAL; in clk_core_set_rate_nolock()
2553 fail_clk->name); in clk_core_set_rate_nolock()
2555 ret = -EBUSY; in clk_core_set_rate_nolock()
2562 core->req_rate = req_rate; in clk_core_set_rate_nolock()
2570 * clk_set_rate - specify a new rate for clk
2588 * Returns 0 on success, -EERROR otherwise.
2600 if (clk->exclusive_count) in clk_set_rate()
2601 clk_core_rate_unprotect(clk->core); in clk_set_rate()
2603 ret = clk_core_set_rate_nolock(clk->core, rate); in clk_set_rate()
2605 if (clk->exclusive_count) in clk_set_rate()
2606 clk_core_rate_protect(clk->core); in clk_set_rate()
2615 * clk_set_rate_exclusive - specify a new rate and get exclusive control
2631 * Returns 0 on success, -EERROR otherwise.
2649 ret = clk_core_set_rate_nolock(clk->core, rate); in clk_set_rate_exclusive()
2651 clk_core_rate_protect(clk->core); in clk_set_rate_exclusive()
2652 clk->exclusive_count++; in clk_set_rate_exclusive()
2673 trace_clk_set_rate_range(clk->core, min, max); in clk_set_rate_range_nolock()
2677 __func__, clk->core->name, clk->dev_id, clk->con_id, in clk_set_rate_range_nolock()
2679 return -EINVAL; in clk_set_rate_range_nolock()
2682 if (clk->exclusive_count) in clk_set_rate_range_nolock()
2683 clk_core_rate_unprotect(clk->core); in clk_set_rate_range_nolock()
2686 old_min = clk->min_rate; in clk_set_rate_range_nolock()
2687 old_max = clk->max_rate; in clk_set_rate_range_nolock()
2688 clk->min_rate = min; in clk_set_rate_range_nolock()
2689 clk->max_rate = max; in clk_set_rate_range_nolock()
2691 if (!clk_core_check_boundaries(clk->core, min, max)) { in clk_set_rate_range_nolock()
2692 ret = -EINVAL; in clk_set_rate_range_nolock()
2696 rate = clk->core->req_rate; in clk_set_rate_range_nolock()
2697 if (clk->core->flags & CLK_GET_RATE_NOCACHE) in clk_set_rate_range_nolock()
2698 rate = clk_core_get_rate_recalc(clk->core); in clk_set_rate_range_nolock()
2712 * - round_rate() was not favorable and fell on the wrong in clk_set_rate_range_nolock()
2714 * - the determine_rate() callback does not really check for in clk_set_rate_range_nolock()
2718 ret = clk_core_set_rate_nolock(clk->core, rate); in clk_set_rate_range_nolock()
2721 clk->min_rate = old_min; in clk_set_rate_range_nolock()
2722 clk->max_rate = old_max; in clk_set_rate_range_nolock()
2726 if (clk->exclusive_count) in clk_set_rate_range_nolock()
2727 clk_core_rate_protect(clk->core); in clk_set_rate_range_nolock()
2733 * clk_set_rate_range - set a rate range for a clock source
2758 * clk_set_min_rate - set a minimum clock rate for a clock source
2769 trace_clk_set_min_rate(clk->core, rate); in clk_set_min_rate()
2771 return clk_set_rate_range(clk, rate, clk->max_rate); in clk_set_min_rate()
2776 * clk_set_max_rate - set a maximum clock rate for a clock source
2787 trace_clk_set_max_rate(clk->core, rate); in clk_set_max_rate()
2789 return clk_set_rate_range(clk, clk->min_rate, rate); in clk_set_max_rate()
2794 * clk_get_parent - return the parent of a clk
2797 * Simply returns clk->parent. Returns NULL if clk is NULL.
2807 /* TODO: Create a per-user clk and change callers to call clk_put */ in clk_get_parent()
2808 parent = !clk->core->parent ? NULL : clk->core->parent->hw->clk; in clk_get_parent()
2819 if (core->num_parents > 1 && core->ops->get_parent) in __clk_init_parent()
2820 index = core->ops->get_parent(core->hw); in __clk_init_parent()
2838 clk_core_reparent(hw->core, !new_parent ? NULL : new_parent->core); in clk_hw_reparent()
2842 * clk_has_parent - check if a clock is a possible parent for another
2857 return clk_core_has_parent(clk->core, parent->core); in clk_has_parent()
2873 if (core->parent == parent) in clk_core_set_parent_nolock()
2876 /* verify ops for multi-parent clks */ in clk_core_set_parent_nolock()
2877 if (core->num_parents > 1 && !core->ops->set_parent) in clk_core_set_parent_nolock()
2878 return -EPERM; in clk_core_set_parent_nolock()
2880 /* check that we are allowed to re-parent if the clock is in use */ in clk_core_set_parent_nolock()
2881 if ((core->flags & CLK_SET_PARENT_GATE) && core->prepare_count) in clk_core_set_parent_nolock()
2882 return -EBUSY; in clk_core_set_parent_nolock()
2885 return -EBUSY; in clk_core_set_parent_nolock()
2892 __func__, parent->name, core->name); in clk_core_set_parent_nolock()
2895 p_rate = parent->rate; in clk_core_set_parent_nolock()
2909 /* do the re-parent */ in clk_core_set_parent_nolock()
2928 return clk_core_set_parent_nolock(hw->core, parent->core); in clk_hw_set_parent()
2933 * clk_set_parent - switch the parent of a mux clk
2937 * Re-parent clk to use parent as its new input source. If clk is in
2947 * Returns 0 on success, -EERROR otherwise.
2958 if (clk->exclusive_count) in clk_set_parent()
2959 clk_core_rate_unprotect(clk->core); in clk_set_parent()
2961 ret = clk_core_set_parent_nolock(clk->core, in clk_set_parent()
2962 parent ? parent->core : NULL); in clk_set_parent()
2964 if (clk->exclusive_count) in clk_set_parent()
2965 clk_core_rate_protect(clk->core); in clk_set_parent()
2975 int ret = -EINVAL; in clk_core_set_phase_nolock()
2983 return -EBUSY; in clk_core_set_phase_nolock()
2987 if (core->ops->set_phase) { in clk_core_set_phase_nolock()
2988 ret = core->ops->set_phase(core->hw, degrees); in clk_core_set_phase_nolock()
2990 core->phase = degrees; in clk_core_set_phase_nolock()
2999 * clk_set_phase - adjust the phase shift of a clock signal
3004 * degrees. Returns 0 on success, -EERROR otherwise.
3008 * phase locked-loop clock signal generators we may shift phase with
3032 if (clk->exclusive_count) in clk_set_phase()
3033 clk_core_rate_unprotect(clk->core); in clk_set_phase()
3035 ret = clk_core_set_phase_nolock(clk->core, degrees); in clk_set_phase()
3037 if (clk->exclusive_count) in clk_set_phase()
3038 clk_core_rate_protect(clk->core); in clk_set_phase()
3051 if (!core->ops->get_phase) in clk_core_get_phase()
3055 ret = core->ops->get_phase(core->hw); in clk_core_get_phase()
3057 core->phase = ret; in clk_core_get_phase()
3063 * clk_get_phase - return the phase shift of a clock signal
3067 * -EERROR.
3077 ret = clk_core_get_phase(clk->core); in clk_get_phase()
3087 core->duty.num = 1; in clk_core_reset_duty_cycle_nolock()
3088 core->duty.den = 2; in clk_core_reset_duty_cycle_nolock()
3095 struct clk_duty *duty = &core->duty; in clk_core_update_duty_cycle_nolock()
3098 if (!core->ops->get_duty_cycle) in clk_core_update_duty_cycle_nolock()
3101 ret = core->ops->get_duty_cycle(core->hw, duty); in clk_core_update_duty_cycle_nolock()
3106 if (duty->den == 0 || duty->num > duty->den) { in clk_core_update_duty_cycle_nolock()
3107 ret = -EINVAL; in clk_core_update_duty_cycle_nolock()
3122 if (core->parent && in clk_core_update_duty_cycle_parent_nolock()
3123 core->flags & CLK_DUTY_CYCLE_PARENT) { in clk_core_update_duty_cycle_parent_nolock()
3124 ret = clk_core_update_duty_cycle_nolock(core->parent); in clk_core_update_duty_cycle_parent_nolock()
3125 memcpy(&core->duty, &core->parent->duty, sizeof(core->duty)); in clk_core_update_duty_cycle_parent_nolock()
3144 return -EBUSY; in clk_core_set_duty_cycle_nolock()
3148 if (!core->ops->set_duty_cycle) in clk_core_set_duty_cycle_nolock()
3151 ret = core->ops->set_duty_cycle(core->hw, duty); in clk_core_set_duty_cycle_nolock()
3153 memcpy(&core->duty, duty, sizeof(*duty)); in clk_core_set_duty_cycle_nolock()
3165 if (core->parent && in clk_core_set_duty_cycle_parent_nolock()
3166 core->flags & (CLK_DUTY_CYCLE_PARENT | CLK_SET_RATE_PARENT)) { in clk_core_set_duty_cycle_parent_nolock()
3167 ret = clk_core_set_duty_cycle_nolock(core->parent, duty); in clk_core_set_duty_cycle_parent_nolock()
3168 memcpy(&core->duty, &core->parent->duty, sizeof(core->duty)); in clk_core_set_duty_cycle_parent_nolock()
3175 * clk_set_duty_cycle - adjust the duty cycle ratio of a clock signal
3195 return -EINVAL; in clk_set_duty_cycle()
3202 if (clk->exclusive_count) in clk_set_duty_cycle()
3203 clk_core_rate_unprotect(clk->core); in clk_set_duty_cycle()
3205 ret = clk_core_set_duty_cycle_nolock(clk->core, &duty); in clk_set_duty_cycle()
3207 if (clk->exclusive_count) in clk_set_duty_cycle()
3208 clk_core_rate_protect(clk->core); in clk_set_duty_cycle()
3219 struct clk_duty *duty = &core->duty; in clk_core_get_scaled_duty_cycle()
3226 ret = mult_frac(scale, duty->num, duty->den); in clk_core_get_scaled_duty_cycle()
3234 * clk_get_scaled_duty_cycle - return the duty cycle ratio of a clock signal
3246 return clk_core_get_scaled_duty_cycle(clk->core, scale); in clk_get_scaled_duty_cycle()
3251 * clk_is_match - check if two clk's point to the same hardware clock
3267 /* true if clk->core pointers match. Avoid dereferencing garbage */ in clk_is_match()
3269 if (p->core == q->core) in clk_is_match()
3292 int level) in clk_summary_show_one() argument
3298 seq_printf(s, "%*s%-*s %-7d %-8d %-8d %-11lu %-10lu ", in clk_summary_show_one()
3299 level * 3 + 1, "", in clk_summary_show_one()
3300 35 - level * 3, c->name, in clk_summary_show_one()
3301 c->enable_count, c->prepare_count, c->protect_count, in clk_summary_show_one()
3307 seq_printf(s, "%-5d", phase); in clk_summary_show_one()
3309 seq_puts(s, "-----"); in clk_summary_show_one()
3311 seq_printf(s, " %-6d", clk_core_get_scaled_duty_cycle(c, 100000)); in clk_summary_show_one()
3313 if (c->ops->is_enabled) in clk_summary_show_one()
3315 else if (!c->ops->enable) in clk_summary_show_one()
3320 hlist_for_each_entry(clk_user, &c->clks, clks_node) { in clk_summary_show_one()
3321 seq_printf(s, "%*s%-*s %-25s\n", in clk_summary_show_one()
3322 level * 3 + 2 + 105 * multi_node, "", in clk_summary_show_one()
3324 clk_user->dev_id ? clk_user->dev_id : "deviceless", in clk_summary_show_one()
3325 clk_user->con_id ? clk_user->con_id : "no_connection_id"); in clk_summary_show_one()
3333 int level) in clk_summary_show_subtree() argument
3337 clk_summary_show_one(s, c, level); in clk_summary_show_subtree()
3339 hlist_for_each_entry(child, &c->children, child_node) in clk_summary_show_subtree()
3340 clk_summary_show_subtree(s, child, level + 1); in clk_summary_show_subtree()
3346 struct hlist_head **lists = s->private; in clk_summary_show()
3351 …s(s, "--------------------------------------------------------------------------------------------… in clk_summary_show()
3370 static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level) in clk_dump_one() argument
3378 seq_printf(s, "\"%s\": { ", c->name); in clk_dump_one()
3379 seq_printf(s, "\"enable_count\": %d,", c->enable_count); in clk_dump_one()
3380 seq_printf(s, "\"prepare_count\": %d,", c->prepare_count); in clk_dump_one()
3381 seq_printf(s, "\"protect_count\": %d,", c->protect_count); in clk_dump_one()
3393 static void clk_dump_subtree(struct seq_file *s, struct clk_core *c, int level) in clk_dump_subtree() argument
3397 clk_dump_one(s, c, level); in clk_dump_subtree()
3399 hlist_for_each_entry(child, &c->children, child_node) { in clk_dump_subtree()
3401 clk_dump_subtree(s, child, level + 1); in clk_dump_subtree()
3411 struct hlist_head **lists = s->private; in clk_dump_show()
3481 ret = clk_prepare_enable(core->hw->clk); in clk_prepare_enable_set()
3483 clk_disable_unprepare(core->hw->clk); in clk_prepare_enable_set()
3492 *val = core->enable_count && core->prepare_count; in clk_prepare_enable_get()
3524 *val = core->phase; in clk_phase_get()
3552 struct clk_core *core = s->private; in clk_flags_show()
3553 unsigned long flags = core->flags; in clk_flags_show()
3583 * 4. Fetch parent clock's clock-output-name if DT index was set in possible_parent_show()
3591 seq_puts(s, parent->name); in possible_parent_show()
3592 } else if (core->parents[i].name) { in possible_parent_show()
3593 seq_puts(s, core->parents[i].name); in possible_parent_show()
3594 } else if (core->parents[i].fw_name) { in possible_parent_show()
3595 seq_printf(s, "<%s>(fw)", core->parents[i].fw_name); in possible_parent_show()
3597 if (core->parents[i].index >= 0) in possible_parent_show()
3598 name = of_clk_get_parent_name(core->of_node, core->parents[i].index); in possible_parent_show()
3610 struct clk_core *core = s->private; in possible_parents_show()
3613 for (i = 0; i < core->num_parents - 1; i++) in possible_parents_show()
3624 struct clk_core *core = s->private; in current_parent_show()
3626 if (core->parent) in current_parent_show()
3627 seq_printf(s, "%s\n", core->parent->name); in current_parent_show()
3637 struct seq_file *s = file->private_data; in current_parent_write()
3638 struct clk_core *core = s->private; in current_parent_write()
3649 return -ENOENT; in current_parent_write()
3671 struct clk_core *core = s->private; in clk_duty_cycle_show()
3672 struct clk_duty *duty = &core->duty; in clk_duty_cycle_show()
3674 seq_printf(s, "%u/%u\n", duty->num, duty->den); in clk_duty_cycle_show()
3682 struct clk_core *core = s->private; in clk_min_rate_show()
3696 struct clk_core *core = s->private; in clk_max_rate_show()
3715 root = debugfs_create_dir(core->name, pdentry); in clk_debug_create_one()
3716 core->dentry = root; in clk_debug_create_one()
3722 debugfs_create_ulong("clk_accuracy", 0444, root, &core->accuracy); in clk_debug_create_one()
3726 debugfs_create_u32("clk_prepare_count", 0444, root, &core->prepare_count); in clk_debug_create_one()
3727 debugfs_create_u32("clk_enable_count", 0444, root, &core->enable_count); in clk_debug_create_one()
3728 debugfs_create_u32("clk_protect_count", 0444, root, &core->protect_count); in clk_debug_create_one()
3729 debugfs_create_u32("clk_notifier_count", 0444, root, &core->notifier_count); in clk_debug_create_one()
3736 if (core->num_parents > 1) in clk_debug_create_one()
3741 if (core->num_parents > 0) in clk_debug_create_one()
3745 if (core->num_parents > 1) in clk_debug_create_one()
3749 if (core->ops->debug_init) in clk_debug_create_one()
3750 core->ops->debug_init(core->hw, core->dentry); in clk_debug_create_one()
3754 * clk_debug_register - add a clk node to the debugfs clk directory
3764 hlist_add_head(&core->debug_node, &clk_debug_list); in clk_debug_register()
3771 * clk_debug_unregister - remove a clk node from the debugfs clk directory
3775 * debugfs clk directory if clk->dentry points to debugfs created by
3781 hlist_del_init(&core->debug_node); in clk_debug_unregister()
3782 debugfs_remove_recursive(core->dentry); in clk_debug_unregister()
3783 core->dentry = NULL; in clk_debug_unregister()
3788 * clk_debug_init - lazily populate the debugfs clk directory
3792 * populates the debugfs clk directory once at boot-time when we know that
3793 * debugfs is setup. It should only be called once at boot-time, all other clks
3879 * 'req_rate' is set to something non-zero so that in clk_core_reparent_orphans_nolock()
3882 orphan->req_rate = orphan->rate; in clk_core_reparent_orphans_nolock()
3888 * __clk_core_init - initialize the data structures in a struct clk_core
3904 * Set hw->core after grabbing the prepare_lock to synchronize with in __clk_core_init()
3905 * callers of clk_core_fill_parent_index() where we treat hw->core in __clk_core_init()
3909 core->hw->core = core; in __clk_core_init()
3916 if (clk_core_lookup(core->name)) { in __clk_core_init()
3918 __func__, core->name); in __clk_core_init()
3919 ret = -EEXIST; in __clk_core_init()
3923 /* check that clk_ops are sane. See Documentation/driver-api/clk.rst */ in __clk_core_init()
3924 if (core->ops->set_rate && in __clk_core_init()
3925 !((core->ops->round_rate || core->ops->determine_rate) && in __clk_core_init()
3926 core->ops->recalc_rate)) { in __clk_core_init()
3928 __func__, core->name); in __clk_core_init()
3929 ret = -EINVAL; in __clk_core_init()
3933 if (core->ops->set_parent && !core->ops->get_parent) { in __clk_core_init()
3935 __func__, core->name); in __clk_core_init()
3936 ret = -EINVAL; in __clk_core_init()
3940 if (core->ops->set_parent && !core->ops->determine_rate) { in __clk_core_init()
3942 __func__, core->name); in __clk_core_init()
3943 ret = -EINVAL; in __clk_core_init()
3947 if (core->num_parents > 1 && !core->ops->get_parent) { in __clk_core_init()
3949 __func__, core->name); in __clk_core_init()
3950 ret = -EINVAL; in __clk_core_init()
3954 if (core->ops->set_rate_and_parent && in __clk_core_init()
3955 !(core->ops->set_parent && core->ops->set_rate)) { in __clk_core_init()
3957 __func__, core->name); in __clk_core_init()
3958 ret = -EINVAL; in __clk_core_init()
3963 * optional platform-specific magic in __clk_core_init()
3976 if (core->ops->init) { in __clk_core_init()
3977 ret = core->ops->init(core->hw); in __clk_core_init()
3982 parent = core->parent = __clk_init_parent(core); in __clk_core_init()
3985 * Populate core->parent if parent has already been clk_core_init'd. If in __clk_core_init()
3991 * clocks and re-parent any that are children of the clock currently in __clk_core_init()
3995 hlist_add_head(&core->child_node, &parent->children); in __clk_core_init()
3996 core->orphan = parent->orphan; in __clk_core_init()
3997 } else if (!core->num_parents) { in __clk_core_init()
3998 hlist_add_head(&core->child_node, &clk_root_list); in __clk_core_init()
3999 core->orphan = false; in __clk_core_init()
4001 hlist_add_head(&core->child_node, &clk_orphan_list); in __clk_core_init()
4002 core->orphan = true; in __clk_core_init()
4012 if (core->ops->recalc_accuracy) in __clk_core_init()
4013 core->accuracy = core->ops->recalc_accuracy(core->hw, in __clk_core_init()
4016 core->accuracy = parent->accuracy; in __clk_core_init()
4018 core->accuracy = 0; in __clk_core_init()
4029 core->name); in __clk_core_init()
4044 if (core->ops->recalc_rate) in __clk_core_init()
4045 rate = core->ops->recalc_rate(core->hw, in __clk_core_init()
4048 rate = parent->rate; in __clk_core_init()
4051 core->rate = core->req_rate = rate; in __clk_core_init()
4058 if (core->flags & CLK_IS_CRITICAL) { in __clk_core_init()
4062 __func__, core->name); in __clk_core_init()
4069 __func__, core->name); in __clk_core_init()
4080 hlist_del_init(&core->child_node); in __clk_core_init()
4081 core->hw->core = NULL; in __clk_core_init()
4093 * clk_core_link_consumer - Add a clk consumer to the list of consumers in a clk_core
4100 hlist_add_head(&clk->clks_node, &core->clks); in clk_core_link_consumer()
4105 * clk_core_unlink_consumer - Remove a clk consumer from the list of consumers in a clk_core
4111 hlist_del(&clk->clks_node); in clk_core_unlink_consumer()
4115 * alloc_clk - Allocate a clk consumer, but leave it unlinked to the clk_core
4129 return ERR_PTR(-ENOMEM); in alloc_clk()
4131 clk->core = core; in alloc_clk()
4132 clk->dev_id = dev_id; in alloc_clk()
4133 clk->con_id = kstrdup_const(con_id, GFP_KERNEL); in alloc_clk()
4134 clk->max_rate = ULONG_MAX; in alloc_clk()
4140 * free_clk - Free a clk consumer
4148 kfree_const(clk->con_id); in free_clk()
4174 core = hw->core; in clk_hw_create_clk()
4178 clk->dev = dev; in clk_hw_create_clk()
4180 if (!try_module_get(core->owner)) { in clk_hw_create_clk()
4182 return ERR_PTR(-ENOENT); in clk_hw_create_clk()
4185 kref_get(&core->ref); in clk_hw_create_clk()
4192 * clk_hw_get_clk - get clk consumer given an clk_hw
4203 struct device *dev = hw->core->dev; in clk_hw_get_clk()
4216 return -EINVAL; in clk_cpy_name()
4222 return -ENOMEM; in clk_cpy_name()
4230 u8 num_parents = init->num_parents; in clk_core_populate_parent_map()
4231 const char * const *parent_names = init->parent_names; in clk_core_populate_parent_map()
4232 const struct clk_hw **parent_hws = init->parent_hws; in clk_core_populate_parent_map()
4233 const struct clk_parent_data *parent_data = init->parent_data; in clk_core_populate_parent_map()
4241 * Avoid unnecessary string look-ups of clk_core's possible parents by in clk_core_populate_parent_map()
4245 core->parents = parents; in clk_core_populate_parent_map()
4247 return -ENOMEM; in clk_core_populate_parent_map()
4251 parent->index = -1; in clk_core_populate_parent_map()
4253 /* throw a WARN if any entries are NULL */ in clk_core_populate_parent_map()
4254 WARN(!parent_names[i], in clk_core_populate_parent_map()
4256 __func__, core->name); in clk_core_populate_parent_map()
4257 ret = clk_cpy_name(&parent->name, parent_names[i], in clk_core_populate_parent_map()
4260 parent->hw = parent_data[i].hw; in clk_core_populate_parent_map()
4261 parent->index = parent_data[i].index; in clk_core_populate_parent_map()
4262 ret = clk_cpy_name(&parent->fw_name, in clk_core_populate_parent_map()
4265 ret = clk_cpy_name(&parent->name, in clk_core_populate_parent_map()
4269 parent->hw = parent_hws[i]; in clk_core_populate_parent_map()
4271 ret = -EINVAL; in clk_core_populate_parent_map()
4272 WARN(1, "Must specify parents if num_parents > 0\n"); in clk_core_populate_parent_map()
4279 } while (--i >= 0); in clk_core_populate_parent_map()
4291 int i = core->num_parents; in clk_core_free_parent_map()
4293 if (!core->num_parents) in clk_core_free_parent_map()
4296 while (--i >= 0) { in clk_core_free_parent_map()
4297 kfree_const(core->parents[i].name); in clk_core_free_parent_map()
4298 kfree_const(core->parents[i].fw_name); in clk_core_free_parent_map()
4301 kfree(core->parents); in clk_core_free_parent_map()
4309 if (core->rpm_enabled) { in __clk_release()
4311 hlist_del(&core->rpm_node); in __clk_release()
4316 kfree_const(core->name); in __clk_release()
4325 const struct clk_init_data *init = hw->init; in __clk_register()
4330 * we catch use of hw->init early on in the core. in __clk_register()
4332 hw->init = NULL; in __clk_register()
4336 ret = -ENOMEM; in __clk_register()
4340 kref_init(&core->ref); in __clk_register()
4342 core->name = kstrdup_const(init->name, GFP_KERNEL); in __clk_register()
4343 if (!core->name) { in __clk_register()
4344 ret = -ENOMEM; in __clk_register()
4348 if (WARN_ON(!init->ops)) { in __clk_register()
4349 ret = -EINVAL; in __clk_register()
4352 core->ops = init->ops; in __clk_register()
4354 core->dev = dev; in __clk_register()
4356 core->of_node = np; in __clk_register()
4357 if (dev && dev->driver) in __clk_register()
4358 core->owner = dev->driver->owner; in __clk_register()
4359 core->hw = hw; in __clk_register()
4360 core->flags = init->flags; in __clk_register()
4361 core->num_parents = init->num_parents; in __clk_register()
4362 core->min_rate = 0; in __clk_register()
4363 core->max_rate = ULONG_MAX; in __clk_register()
4369 INIT_HLIST_HEAD(&core->clks); in __clk_register()
4375 hw->clk = alloc_clk(core, NULL, NULL); in __clk_register()
4376 if (IS_ERR(hw->clk)) { in __clk_register()
4377 ret = PTR_ERR(hw->clk); in __clk_register()
4381 clk_core_link_consumer(core, hw->clk); in __clk_register()
4385 return hw->clk; in __clk_register()
4388 clk_core_unlink_consumer(hw->clk); in __clk_register()
4391 free_clk(hw->clk); in __clk_register()
4392 hw->clk = NULL; in __clk_register()
4398 kref_put(&core->ref, __clk_release); in __clk_register()
4404 * dev_or_parent_of_node() - Get device node of @dev or @dev's parent
4408 * @dev->parent if dev doesn't have a device node, or NULL if neither
4409 * @dev or @dev->parent have a device node.
4420 np = dev_of_node(dev->parent); in dev_or_parent_of_node()
4426 * clk_register - allocate a new clock, register it and return an opaque cookie
4428 * @hw: link to hardware-specific clock data
4445 * clk_hw_register - register a clk_hw and return an error code
4447 * @hw: link to hardware-specific clock data
4462 * of_clk_hw_register - register a clk_hw and return an error code
4464 * @hw: link to hardware-specific clock data
4485 return -ENXIO; in clk_nodrv_prepare_enable()
4496 return -ENXIO; in clk_nodrv_set_rate()
4501 return -ENXIO; in clk_nodrv_set_parent()
4507 return -ENXIO; in clk_nodrv_determine_rate()
4526 for (i = 0; i < root->num_parents; i++) in clk_core_evict_parent_cache_subtree()
4527 if (root->parents[i].core == target) in clk_core_evict_parent_cache_subtree()
4528 root->parents[i].core = NULL; in clk_core_evict_parent_cache_subtree()
4530 hlist_for_each_entry(child, &root->children, child_node) in clk_core_evict_parent_cache_subtree()
4549 * clk_unregister - unregister a currently registered clock
4560 clk_debug_unregister(clk->core); in clk_unregister()
4564 ops = clk->core->ops; in clk_unregister()
4567 clk->core->name); in clk_unregister()
4576 clk->core->ops = &clk_nodrv_ops; in clk_unregister()
4579 if (ops->terminate) in clk_unregister()
4580 ops->terminate(clk->core->hw); in clk_unregister()
4582 if (!hlist_empty(&clk->core->children)) { in clk_unregister()
4587 hlist_for_each_entry_safe(child, t, &clk->core->children, in clk_unregister()
4592 clk_core_evict_parent_cache(clk->core); in clk_unregister()
4594 hlist_del_init(&clk->core->child_node); in clk_unregister()
4596 if (clk->core->prepare_count) in clk_unregister()
4598 __func__, clk->core->name); in clk_unregister()
4600 if (clk->core->protect_count) in clk_unregister()
4602 __func__, clk->core->name); in clk_unregister()
4605 kref_put(&clk->core->ref, __clk_release); in clk_unregister()
4611 * clk_hw_unregister - unregister a currently registered clk_hw
4612 * @hw: hardware-specific clock data to unregister
4616 clk_unregister(hw->clk); in clk_hw_unregister()
4631 * devm_clk_register - resource managed clk_register()
4633 * @hw: link to hardware-specific clock data
4647 return ERR_PTR(-ENOMEM); in devm_clk_register()
4662 * devm_clk_hw_register - resource managed clk_hw_register()
4664 * @hw: link to hardware-specific clock data
4677 return -ENOMEM; in devm_clk_hw_register()
4697 * devm_clk_hw_get_clk - resource managed clk_hw_get_clk()
4716 WARN_ON_ONCE(dev != hw->core->dev); in devm_clk_hw_get_clk()
4720 return ERR_PTR(-ENOMEM); in devm_clk_hw_get_clk()
4752 if (WARN_ON(clk->exclusive_count)) { in __clk_put()
4754 clk->core->protect_count -= (clk->exclusive_count - 1); in __clk_put()
4755 clk_core_rate_unprotect(clk->core); in __clk_put()
4756 clk->exclusive_count = 0; in __clk_put()
4762 if (clk->min_rate > 0 || clk->max_rate < ULONG_MAX) in __clk_put()
4767 owner = clk->core->owner; in __clk_put()
4768 kref_put(&clk->core->ref, __clk_release); in __clk_put()
4776 * clk_notifier_register - add a clk rate change notifier
4783 * re-enter into the clk framework by calling any top-level clk APIs;
4790 * clk_notifier_register() must be called from non-atomic context.
4791 * Returns -EINVAL if called with null arguments, -ENOMEM upon
4798 int ret = -ENOMEM; in clk_notifier_register()
4801 return -EINVAL; in clk_notifier_register()
4807 if (cn->clk == clk) in clk_notifier_register()
4815 cn->clk = clk; in clk_notifier_register()
4816 srcu_init_notifier_head(&cn->notifier_head); in clk_notifier_register()
4818 list_add(&cn->node, &clk_notifier_list); in clk_notifier_register()
4821 ret = srcu_notifier_chain_register(&cn->notifier_head, nb); in clk_notifier_register()
4823 clk->core->notifier_count++; in clk_notifier_register()
4833 * clk_notifier_unregister - remove a clk rate change notifier
4840 * Returns -EINVAL if called with null arguments; otherwise, passes
4846 int ret = -ENOENT; in clk_notifier_unregister()
4849 return -EINVAL; in clk_notifier_unregister()
4854 if (cn->clk == clk) { in clk_notifier_unregister()
4855 ret = srcu_notifier_chain_unregister(&cn->notifier_head, nb); in clk_notifier_unregister()
4857 clk->core->notifier_count--; in clk_notifier_unregister()
4860 if (!cn->notifier_head.head) { in clk_notifier_unregister()
4861 srcu_cleanup_notifier_head(&cn->notifier_head); in clk_notifier_unregister()
4862 list_del(&cn->node); in clk_notifier_unregister()
4884 clk_notifier_unregister(devres->clk, devres->nb); in devm_clk_notifier_release()
4897 return -ENOMEM; in devm_clk_notifier_register()
4901 devres->clk = clk; in devm_clk_notifier_register()
4902 devres->nb = nb; in devm_clk_notifier_register()
4921 * struct of_clk_provider - Clock provider registration structure
4962 unsigned int idx = clkspec->args[0]; in of_clk_src_onecell_get()
4964 if (idx >= clk_data->clk_num) { in of_clk_src_onecell_get()
4966 return ERR_PTR(-EINVAL); in of_clk_src_onecell_get()
4969 return clk_data->clks[idx]; in of_clk_src_onecell_get()
4977 unsigned int idx = clkspec->args[0]; in of_clk_hw_onecell_get()
4979 if (idx >= hw_data->num) { in of_clk_hw_onecell_get()
4981 return ERR_PTR(-EINVAL); in of_clk_hw_onecell_get()
4984 return hw_data->hws[idx]; in of_clk_hw_onecell_get()
4989 * of_clk_add_provider() - Register a clock provider for a node
5009 return -ENOMEM; in of_clk_add_provider()
5011 cp->node = of_node_get(np); in of_clk_add_provider()
5012 cp->data = data; in of_clk_add_provider()
5013 cp->get = clk_src_get; in of_clk_add_provider()
5016 list_add(&cp->link, &of_clk_providers); in of_clk_add_provider()
5026 fwnode_dev_initialized(&np->fwnode, true); in of_clk_add_provider()
5033 * of_clk_add_hw_provider() - Register a clock provider for a node
5051 return -ENOMEM; in of_clk_add_hw_provider()
5053 cp->node = of_node_get(np); in of_clk_add_hw_provider()
5054 cp->data = data; in of_clk_add_hw_provider()
5055 cp->get_hw = get; in of_clk_add_hw_provider()
5058 list_add(&cp->link, &of_clk_providers); in of_clk_add_hw_provider()
5068 fwnode_dev_initialized(&np->fwnode, true); in of_clk_add_hw_provider()
5081 * for cases like MFD sub-devices where the child device driver wants to use
5082 * devm_*() APIs but not list the device in DT as a sub-node.
5088 np = dev->of_node; in get_clk_provider_node()
5089 parent_np = dev->parent ? dev->parent->of_node : NULL; in get_clk_provider_node()
5091 if (!of_property_present(np, "#clock-cells")) in get_clk_provider_node()
5092 if (of_property_present(parent_np, "#clock-cells")) in get_clk_provider_node()
5099 * devm_of_clk_add_hw_provider() - Managed clk provider node registration
5105 * node or if the device node lacks of clock provider information (#clock-cells)
5107 * has the #clock-cells then it is used in registration. Provider is
5123 return -ENOMEM; in devm_of_clk_add_hw_provider()
5139 * of_clk_del_provider() - Remove a previously registered clock provider
5151 if (cp->node == np) { in of_clk_del_provider()
5152 list_del(&cp->link); in of_clk_del_provider()
5153 fwnode_dev_initialized(&np->fwnode, false); in of_clk_del_provider()
5154 of_node_put(cp->node); in of_clk_del_provider()
5164 * of_parse_clkspec() - Parse a DT clock specifier for a given device node
5170 * Parses a device node's "clocks" and "clock-names" properties to find the
5173 * parsing error. The @index argument is ignored if @name is non-NULL.
5177 * phandle1: clock-controller@1 {
5178 * #clock-cells = <2>;
5181 * phandle2: clock-controller@2 {
5182 * #clock-cells = <1>;
5185 * clock-consumer@3 {
5187 * clock-names = "name1", "name2";
5190 * To get a device_node for `clock-controller@2' node you may call this
5193 * of_parse_clkspec(clock-consumer@3, -1, "name2", &args);
5194 * of_parse_clkspec(clock-consumer@3, 1, NULL, &args);
5195 * of_parse_clkspec(clock-consumer@3, 1, "name2", &args);
5197 * Return: 0 upon successfully parsing the clock specifier. Otherwise, -ENOENT
5198 * if @name is NULL or -EINVAL if @name is non-NULL and it can't be found in
5199 * the "clock-names" property of @np.
5204 int ret = -ENOENT; in of_parse_clkspec()
5210 * "clock-names" property. If it cannot be found, then index in of_parse_clkspec()
5212 * return -EINVAL. in of_parse_clkspec()
5215 index = of_property_match_string(np, "clock-names", name); in of_parse_clkspec()
5216 ret = of_parse_phandle_with_args(np, "clocks", "#clock-cells", in of_parse_clkspec()
5225 * has a "clock-ranges" property, then we can try one of its in of_parse_clkspec()
5228 np = np->parent; in of_parse_clkspec()
5229 if (np && !of_property_present(np, "clock-ranges")) in of_parse_clkspec()
5243 if (provider->get_hw) in __of_clk_get_hw_from_provider()
5244 return provider->get_hw(clkspec, provider->data); in __of_clk_get_hw_from_provider()
5246 clk = provider->get(clkspec, provider->data); in __of_clk_get_hw_from_provider()
5256 struct clk_hw *hw = ERR_PTR(-EPROBE_DEFER); in of_clk_get_hw_from_clkspec()
5259 return ERR_PTR(-EINVAL); in of_clk_get_hw_from_clkspec()
5263 if (provider->node == clkspec->np) { in of_clk_get_hw_from_clkspec()
5275 * of_clk_get_from_provider() - Lookup a clock from a clock provider
5318 return __of_clk_get(np, index, np->full_name, NULL); in of_clk_get()
5323 * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node
5327 * This function parses the clocks and clock-names properties,
5334 return ERR_PTR(-ENOENT); in of_clk_get_by_name()
5336 return __of_clk_get(np, 0, np->full_name, name); in of_clk_get_by_name()
5341 * of_clk_get_parent_count() - Count the number of clocks a device node has
5350 count = of_count_phandle_with_args(np, "clocks", "#clock-cells"); in of_clk_get_parent_count()
5368 rc = of_parse_phandle_with_args(np, "clocks", "#clock-cells", index, in of_clk_get_parent_name()
5377 * specified into an array offset for the clock-output-names property. in of_clk_get_parent_name()
5379 of_property_for_each_u32(clkspec.np, "clock-indices", pv) { in of_clk_get_parent_name()
5387 /* We went off the end of 'clock-indices' without finding it */ in of_clk_get_parent_name()
5388 if (of_property_present(clkspec.np, "clock-indices") && !found) in of_clk_get_parent_name()
5391 if (of_property_read_string_index(clkspec.np, "clock-output-names", in of_clk_get_parent_name()
5398 * the clock as long as #clock-cells = 0. in of_clk_get_parent_name()
5403 clk_name = clkspec.np->name; in of_clk_get_parent_name()
5419 * of_clk_parent_fill() - Fill @parents with names of @np's parents and return
5465 if (PTR_ERR(clk) == -EPROBE_DEFER) in parent_ready()
5481 * of_clk_detect_critical() - set CLK_IS_CRITICAL flag from Device Tree
5484 * @flags: pointer to top-level framework flags
5486 * Detects if the clock-critical property exists and, if so, sets the
5490 * bindings, such as the one-clock-per-node style that are outdated.
5504 return -EINVAL; in of_clk_detect_critical()
5506 of_property_for_each_u32(np, "clock-critical", idx) in of_clk_detect_critical()
5514 * of_clk_init() - Scan and init clock providers from the DT
5544 list_del(&clk_provider->node); in of_clk_init()
5545 of_node_put(clk_provider->np); in of_clk_init()
5552 parent->clk_init_cb = match->data; in of_clk_init()
5553 parent->np = of_node_get(np); in of_clk_init()
5554 list_add_tail(&parent->node, &clk_provider_list); in of_clk_init()
5561 if (force || parent_ready(clk_provider->np)) { in of_clk_init()
5564 of_node_set_flag(clk_provider->np, in of_clk_init()
5567 clk_provider->clk_init_cb(clk_provider->np); in of_clk_init()
5568 of_clk_set_defaults(clk_provider->np, true); in of_clk_init()
5570 list_del(&clk_provider->node); in of_clk_init()
5571 of_node_put(clk_provider->np); in of_clk_init()