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);

 
 1/*
 2 * TI Fixed Factor Clock
 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/err.h>
21#include <linux/of.h>
22#include <linux/of_address.h>
23#include <linux/clk/ti.h>
24
 
 
25#undef pr_fmt
26#define pr_fmt(fmt) "%s: " fmt, __func__
27
28/**
29 * of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock
30 * @node: device node for this clock
31 *
32 * Sets up a simple fixed factor clock based on device tree info.
33 */
34static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
35{
36	struct clk *clk;
37	const char *clk_name = node->name;
38	const char *parent_name;
39	u32 div, mult;
40	u32 flags = 0;
41
42	if (of_property_read_u32(node, "ti,clock-div", &div)) {
43		pr_err("%s must have a clock-div property\n", node->name);
44		return;
45	}
46
47	if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
48		pr_err("%s must have a clock-mult property\n", node->name);
49		return;
50	}
51
52	if (of_property_read_bool(node, "ti,set-rate-parent"))
53		flags |= CLK_SET_RATE_PARENT;
54
55	parent_name = of_clk_get_parent_name(node, 0);
56
57	clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
58					mult, div);
59
60	if (!IS_ERR(clk)) {
61		of_clk_add_provider(node, of_clk_src_simple_get, clk);
62		of_ti_clk_autoidle_setup(node);
 
63	}
64}
65CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
66	       of_ti_fixed_factor_clk_setup);