diff options
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 134 |
1 files changed, 56 insertions, 78 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 8b73edef151d..b76fa69b44cb 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -10,6 +10,7 @@ */ #include <linux/clk-private.h> +#include <linux/clk/clk-conf.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/spinlock.h> @@ -98,9 +99,19 @@ static void clk_enable_unlock(unsigned long flags) #include <linux/debugfs.h> static struct dentry *rootdir; -static struct dentry *orphandir; static int inited = 0; +static struct hlist_head *all_lists[] = { + &clk_root_list, + &clk_orphan_list, + NULL, +}; + +static struct hlist_head *orphan_list[] = { + &clk_orphan_list, + NULL, +}; + static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level) { if (!c) @@ -130,17 +141,16 @@ static void clk_summary_show_subtree(struct seq_file *s, struct clk *c, static int clk_summary_show(struct seq_file *s, void *data) { struct clk *c; + struct hlist_head **lists = (struct hlist_head **)s->private; seq_puts(s, " clock enable_cnt prepare_cnt rate accuracy\n"); seq_puts(s, "--------------------------------------------------------------------------------\n"); clk_prepare_lock(); - hlist_for_each_entry(c, &clk_root_list, child_node) - clk_summary_show_subtree(s, c, 0); - - hlist_for_each_entry(c, &clk_orphan_list, child_node) - clk_summary_show_subtree(s, c, 0); + for (; *lists; lists++) + hlist_for_each_entry(c, *lists, child_node) + clk_summary_show_subtree(s, c, 0); clk_prepare_unlock(); @@ -193,21 +203,19 @@ static int clk_dump(struct seq_file *s, void *data) { struct clk *c; bool first_node = true; + struct hlist_head **lists = (struct hlist_head **)s->private; seq_printf(s, "{"); clk_prepare_lock(); - hlist_for_each_entry(c, &clk_root_list, child_node) { - if (!first_node) - seq_printf(s, ","); - first_node = false; - clk_dump_subtree(s, c, 0); - } - - hlist_for_each_entry(c, &clk_orphan_list, child_node) { - seq_printf(s, ","); - clk_dump_subtree(s, c, 0); + for (; *lists; lists++) { + hlist_for_each_entry(c, *lists, child_node) { + if (!first_node) + seq_puts(s, ","); + first_node = false; + clk_dump_subtree(s, c, 0); + } } clk_prepare_unlock(); @@ -276,9 +284,11 @@ static int clk_debug_create_one(struct clk *clk, struct dentry *pdentry) if (!d) goto err_out; - if (clk->ops->debug_init) - if (clk->ops->debug_init(clk->hw, clk->dentry)) + if (clk->ops->debug_init) { + ret = clk->ops->debug_init(clk->hw, clk->dentry); + if (ret) goto err_out; + } ret = 0; goto out; @@ -305,7 +315,7 @@ static int clk_debug_create_subtree(struct clk *clk, struct dentry *pdentry) goto out; hlist_for_each_entry(child, &clk->children, child_node) - clk_debug_create_subtree(child, clk->dentry); + clk_debug_create_subtree(child, pdentry); ret = 0; out: @@ -325,31 +335,12 @@ out: */ static int clk_debug_register(struct clk *clk) { - struct clk *parent; - struct dentry *pdentry; int ret = 0; if (!inited) goto out; - parent = clk->parent; - - /* - * Check to see if a clk is a root clk. Also check that it is - * safe to add this clk to debugfs - */ - if (!parent) - if (clk->flags & CLK_IS_ROOT) - pdentry = rootdir; - else - pdentry = orphandir; - else - if (parent->dentry) - pdentry = parent->dentry; - else - goto out; - - ret = clk_debug_create_subtree(clk, pdentry); + ret = clk_debug_create_subtree(clk, rootdir); out: return ret; @@ -370,38 +361,17 @@ static void clk_debug_unregister(struct clk *clk) debugfs_remove_recursive(clk->dentry); } -/** - * clk_debug_reparent - reparent clk node in the debugfs clk tree - * @clk: the clk being reparented - * @new_parent: the new clk parent, may be NULL - * - * Rename clk entry in the debugfs clk tree if debugfs has been - * initialized. Otherwise it bails out early since the debugfs clk tree - * will be created lazily by clk_debug_init as part of a late_initcall. - * - * Caller must hold prepare_lock. - */ -static void clk_debug_reparent(struct clk *clk, struct clk *new_parent) +struct dentry *clk_debugfs_add_file(struct clk *clk, char *name, umode_t mode, + void *data, const struct file_operations *fops) { - struct dentry *d; - struct dentry *new_parent_d; - - if (!inited) - return; + struct dentry *d = NULL; - if (new_parent) - new_parent_d = new_parent->dentry; - else - new_parent_d = orphandir; + if (clk->dentry) + d = debugfs_create_file(name, mode, clk->dentry, data, fops); - d = debugfs_rename(clk->dentry->d_parent, clk->dentry, - new_parent_d, clk->name); - if (d) - clk->dentry = d; - else - pr_debug("%s: failed to rename debugfs entry for %s\n", - __func__, clk->name); + return d; } +EXPORT_SYMBOL_GPL(clk_debugfs_add_file); /** * clk_debug_init - lazily create the debugfs clk tree visualization @@ -425,19 +395,24 @@ static int __init clk_debug_init(void) if (!rootdir) return -ENOMEM; - d = debugfs_create_file("clk_summary", S_IRUGO, rootdir, NULL, + d = debugfs_create_file("clk_summary", S_IRUGO, rootdir, &all_lists, &clk_summary_fops); if (!d) return -ENOMEM; - d = debugfs_create_file("clk_dump", S_IRUGO, rootdir, NULL, + d = debugfs_create_file("clk_dump", S_IRUGO, rootdir, &all_lists, &clk_dump_fops); if (!d) return -ENOMEM; - orphandir = debugfs_create_dir("orphans", rootdir); + d = debugfs_create_file("clk_orphan_summary", S_IRUGO, rootdir, + &orphan_list, &clk_summary_fops); + if (!d) + return -ENOMEM; - if (!orphandir) + d = debugfs_create_file("clk_orphan_dump", S_IRUGO, rootdir, + &orphan_list, &clk_dump_fops); + if (!d) return -ENOMEM; clk_prepare_lock(); @@ -446,7 +421,7 @@ static int __init clk_debug_init(void) clk_debug_create_subtree(clk, rootdir); hlist_for_each_entry(clk, &clk_orphan_list, child_node) - clk_debug_create_subtree(clk, orphandir); + clk_debug_create_subtree(clk, rootdir); inited = 1; @@ -1284,9 +1259,6 @@ static void __clk_set_parent_after(struct clk *clk, struct clk *parent, clk_disable(old_parent); __clk_unprepare(old_parent); } - - /* update debugfs with new clk tree topology */ - clk_debug_reparent(clk, parent); } static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index) @@ -1683,7 +1655,6 @@ out: void __clk_reparent(struct clk *clk, struct clk *new_parent) { clk_reparent(clk, new_parent); - clk_debug_reparent(clk, new_parent); __clk_recalc_accuracies(clk); __clk_recalc_rates(clk, POST_RATE_CHANGE); } @@ -2414,6 +2385,7 @@ int of_clk_add_provider(struct device_node *np, void *data) { struct of_clk_provider *cp; + int ret; cp = kzalloc(sizeof(struct of_clk_provider), GFP_KERNEL); if (!cp) @@ -2428,7 +2400,11 @@ int of_clk_add_provider(struct device_node *np, mutex_unlock(&of_clk_mutex); pr_debug("Added clock from %s\n", np->full_name); - return 0; + ret = of_clk_set_defaults(np, true); + if (ret < 0) + of_clk_del_provider(np); + + return ret; } EXPORT_SYMBOL_GPL(of_clk_add_provider); @@ -2605,7 +2581,10 @@ void __init of_clk_init(const struct of_device_id *matches) list_for_each_entry_safe(clk_provider, next, &clk_provider_list, node) { if (force || parent_ready(clk_provider->np)) { + clk_provider->clk_init_cb(clk_provider->np); + of_clk_set_defaults(clk_provider->np, true); + list_del(&clk_provider->node); kfree(clk_provider); is_init_done = true; @@ -2620,7 +2599,6 @@ void __init of_clk_init(const struct of_device_id *matches) */ if (!is_init_done) force = true; - } } #endif |