tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 (__clk_get_flags(clk) & CLK_IS_BASIC) {
40 pr_warn("can't setup clkdm for basic clk %s\n",
41 __clk_get_name(clk));
42 continue;
43 }
44 clk_hw = __clk_get_hw(clk);
45 to_clk_hw_omap(clk_hw)->clkdm_name = clkdm_name;
46 omap2_init_clk_clkdm(clk_hw);
47 }
48}
49
50static struct of_device_id ti_clkdm_match_table[] __initdata = {
51 { .compatible = "ti,clockdomain" },
52 { }
53};
54
55/**
56 * ti_dt_clockdomains_setup - setup device tree clockdomains
57 *
58 * Initializes clockdomain nodes for a SoC. This parses through all the
59 * nodes with compatible = "ti,clockdomain", and add the clockdomain
60 * info for all the clocks listed under these. This function shall be
61 * called after rest of the DT clock init has completed and all
62 * clock nodes have been registered.
63 */
64void __init ti_dt_clockdomains_setup(void)
65{
66 struct device_node *np;
67 for_each_matching_node(np, ti_clkdm_match_table) {
68 of_ti_clockdomain_setup(np);
69 }
70}