diff options
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index aa51756fd4d6..09d8e84a1968 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -2997,15 +2997,49 @@ static int clk_flags_show(struct seq_file *s, void *data) } DEFINE_SHOW_ATTRIBUTE(clk_flags); +static void possible_parent_show(struct seq_file *s, struct clk_core *core, + unsigned int i, char terminator) +{ + struct clk_core *parent; + + /* + * Go through the following options to fetch a parent's name. + * + * 1. Fetch the registered parent clock and use its name + * 2. Use the global (fallback) name if specified + * 3. Use the local fw_name if provided + * 4. Fetch parent clock's clock-output-name if DT index was set + * + * This may still fail in some cases, such as when the parent is + * specified directly via a struct clk_hw pointer, but it isn't + * registered (yet). + */ + parent = clk_core_get_parent_by_index(core, i); + if (parent) + seq_printf(s, "%s", parent->name); + else if (core->parents[i].name) + seq_printf(s, "%s", core->parents[i].name); + else if (core->parents[i].fw_name) + seq_printf(s, "<%s>(fw)", core->parents[i].fw_name); + else if (core->parents[i].index >= 0) + seq_printf(s, "%s", + of_clk_get_parent_name(core->of_node, + core->parents[i].index)); + else + seq_puts(s, "(missing)"); + + seq_putc(s, terminator); +} + static int possible_parents_show(struct seq_file *s, void *data) { struct clk_core *core = s->private; int i; for (i = 0; i < core->num_parents - 1; i++) - seq_printf(s, "%s ", core->parents[i].name); + possible_parent_show(s, core, i, ' '); - seq_printf(s, "%s\n", core->parents[i].name); + possible_parent_show(s, core, i, '\n'); return 0; } |