2 * Copyright (C) 2015 Jens Kuske <jenskuske@gmail.com>
4 * Based on clk-simple-gates.c, which is:
5 * Copyright 2015 Maxime Ripard
7 * Maxime Ripard <maxime.ripard@free-electrons.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
20 #include <linux/clk.h>
21 #include <linux/clk-provider.h>
23 #include <linux/of_address.h>
24 #include <linux/slab.h>
25 #include <linux/spinlock.h>
27 static DEFINE_SPINLOCK(gates_lock);
29 static void __init sun8i_h3_bus_gates_init(struct device_node *node)
31 static const char * const names[] = { "ahb1", "ahb2", "apb1", "apb2" };
32 enum { AHB1, AHB2, APB1, APB2, PARENT_MAX } clk_parent;
33 const char *parents[PARENT_MAX];
34 struct clk_onecell_data *clk_data;
36 struct property *prop;
38 void __iomem *clk_reg;
45 reg = of_io_request_and_map(node, 0, of_node_full_name(node));
49 for (i = 0; i < ARRAY_SIZE(names); i++) {
50 index = of_property_match_string(node, "clock-names",
55 parents[i] = of_clk_get_parent_name(node, index);
58 clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL);
62 number = of_property_count_u32_elems(node, "clock-indices");
63 of_property_read_u32_index(node, "clock-indices", number - 1, &number);
65 clk_data->clks = kcalloc(number + 1, sizeof(struct clk *), GFP_KERNEL);
70 of_property_for_each_u32(node, "clock-indices", prop, p, index) {
71 of_property_read_string_index(node, "clock-output-names",
74 if (index == 17 || (index >= 29 && index <= 31))
76 else if (index <= 63 || index >= 128)
78 else if (index >= 64 && index <= 95)
80 else if (index >= 96 && index <= 127)
83 clk_reg = reg + 4 * (index / 32);
86 clk_data->clks[index] = clk_register_gate(NULL, clk_name,
92 if (IS_ERR(clk_data->clks[index])) {
98 clk_data->clk_num = number + 1;
99 of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
107 of_address_to_resource(node, 0, &res);
108 release_mem_region(res.start, resource_size(&res));
111 CLK_OF_DECLARE(sun8i_h3_bus_gates, "allwinner,sun8i-h3-bus-gates-clk",
112 sun8i_h3_bus_gates_init);