1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * TI Fixed Factor Clock
4 *
5 * Copyright (C) 2013 Texas Instruments, Inc.
6 *
7 * Tero Kristo <t-kristo@ti.com>
8 */
9
10#include <linux/clk-provider.h>
11#include <linux/slab.h>
12#include <linux/err.h>
13#include <linux/of.h>
14#include <linux/of_address.h>
15#include <linux/clk/ti.h>
16
17#include "clock.h"
18
19#undef pr_fmt
20#define pr_fmt(fmt) "%s: " fmt, __func__
21
22/**
23 * of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock
24 * @node: device node for this clock
25 *
26 * Sets up a simple fixed factor clock based on device tree info.
27 */
28static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
29{
30	struct clk *clk;
31	const char *clk_name = ti_dt_clk_name(node);
32	const char *parent_name;
33	u32 div, mult;
34	u32 flags = 0;
35
36	if (of_property_read_u32(node, "ti,clock-div", &div)) {
37		pr_err("%pOFn must have a clock-div property\n", node);
38		return;
39	}
40
41	if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
42		pr_err("%pOFn must have a clock-mult property\n", node);
43		return;
44	}
45
46	if (of_property_read_bool(node, "ti,set-rate-parent"))
47		flags |= CLK_SET_RATE_PARENT;
48
49	parent_name = of_clk_get_parent_name(node, 0);
50
51	clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
52					mult, div);
53
54	if (!IS_ERR(clk)) {
55		of_clk_add_provider(node, of_clk_src_simple_get, clk);
56		of_ti_clk_autoidle_setup(node);
57		ti_clk_add_alias(clk, clk_name);
58	}
59}
60CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
61	       of_ti_fixed_factor_clk_setup);
62