clk: add clk_possible_parents debugfs file
For validation purposes, it's often useful to be able to retrieve the list of possible parents in userspace. Add a debugfs file for every clock which has more than 1 possible parent. Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> Reviewed-by: Jon Mayo <jmayo@nvidia.com> [sboyd@codeaurora.org: Remove useless cast from void and extra newline] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@baylibre.com>hifive-unleashed-5.1
parent
1905719556
commit
92031575c3
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@ -2126,6 +2126,31 @@ static const struct file_operations clk_dump_fops = {
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.release = single_release,
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.release = single_release,
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};
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};
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static int possible_parents_dump(struct seq_file *s, void *data)
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{
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struct clk_core *core = s->private;
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int i;
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for (i = 0; i < core->num_parents - 1; i++)
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seq_printf(s, "%s ", core->parent_names[i]);
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seq_printf(s, "%s\n", core->parent_names[i]);
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return 0;
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}
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static int possible_parents_open(struct inode *inode, struct file *file)
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{
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return single_open(file, possible_parents_dump, inode->i_private);
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}
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static const struct file_operations possible_parents_fops = {
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.open = possible_parents_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
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static int clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
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{
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{
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struct dentry *d;
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struct dentry *d;
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@ -2177,6 +2202,13 @@ static int clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
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if (!d)
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if (!d)
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goto err_out;
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goto err_out;
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if (core->num_parents > 1) {
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d = debugfs_create_file("clk_possible_parents", S_IRUGO,
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core->dentry, core, &possible_parents_fops);
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if (!d)
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goto err_out;
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}
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if (core->ops->debug_init) {
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if (core->ops->debug_init) {
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ret = core->ops->debug_init(core->hw, core->dentry);
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ret = core->ops->debug_init(core->hw, core->dentry);
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if (ret)
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if (ret)
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