Hi

On 2018/12/05 3:15, Stephen Boyd wrote:

Quoting Sugaya, Taichi (2018-12-04 00:26:16)

quoted

On 2018/11/30 17:31, Stephen Boyd wrote:

quoted

Quoting Sugaya Taichi (2018-11-18 17:01:12)

quoted

+void __init m10v_clk_mux_setup(struct device_node *node)
+{
+       const char *clk_name = node->name;
+       struct clk_init_data init;
+       const char **parent_names;
+       struct m10v_mux *mcm;
+       struct clk *clk;
+       int i, parents;
+
+       if (!m10v_clk_iomap())
+               return;
+
+       of_property_read_string(node, "clock-output-names", &clk_name);
+
+       parents = of_clk_get_parent_count(node);
+       if (parents < 2) {
+               pr_err("%s: not a mux\n", clk_name);

How is this possible?

When the node has more than 1 clks...
Or I am misunderstanding your question?

This looks like code that's checking DT for correctness. We don't
typically do that in the kernel because the kernel isn't a DT validator.
That's all I'm saying. I think this comment is not useful if the driver
design is done to specify parent linkages in C code instead of DT, so
don't worry about this too much.

I understand.
Thank you for additional information.

Sugaya Taichi

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