1/*
2 * OMAP clockdomain support
3 *
4 * Copyright (C) 2013 Texas Instruments, Inc.
5 *
6 * Tero Kristo <t-kristo@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/clk-provider.h>
19#include <linux/slab.h>
20#include <linux/of.h>
21#include <linux/of_address.h>
22#include <linux/clk/ti.h>
23
24#undef pr_fmt
25#define pr_fmt(fmt) "%s: " fmt, __func__
26
27static void __init of_ti_clockdomain_setup(struct device_node *node)
28{
29	struct clk *clk;
30	struct clk_hw *clk_hw;
31	const char *clkdm_name = node->name;
32	int i;
33	int num_clks;
34
35	num_clks = of_count_phandle_with_args(node, "clocks", "#clock-cells");
36
37	for (i = 0; i < num_clks; i++) {
38		clk = of_clk_get(node, i);
39		if (IS_ERR(clk)) {
40			pr_err("%s: Failed get %s' clock nr %d (%ld)\n",
41			       __func__, node->full_name, i, PTR_ERR(clk));
42			continue;
43		}
44		if (__clk_get_flags(clk) & CLK_IS_BASIC) {
45			pr_warn("can't setup clkdm for basic clk %s\n",
46				__clk_get_name(clk));
47			continue;
48		}
49		clk_hw = __clk_get_hw(clk);
50		to_clk_hw_omap(clk_hw)->clkdm_name = clkdm_name;
51		omap2_init_clk_clkdm(clk_hw);
52	}
53}
54
55static const struct of_device_id ti_clkdm_match_table[] __initconst = {
56	{ .compatible = "ti,clockdomain" },
57	{ }
58};
59
60/**
61 * ti_dt_clockdomains_setup - setup device tree clockdomains
62 *
63 * Initializes clockdomain nodes for a SoC. This parses through all the
64 * nodes with compatible = "ti,clockdomain", and add the clockdomain
65 * info for all the clocks listed under these. This function shall be
66 * called after rest of the DT clock init has completed and all
67 * clock nodes have been registered.
68 */
69void __init ti_dt_clockdomains_setup(void)
70{
71	struct device_node *np;
72	for_each_matching_node(np, ti_clkdm_match_table) {
73		of_ti_clockdomain_setup(np);
74	}
75}
76