treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / clk / sunxi / clk-a10-mod1.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright 2013 Emilio López
4  *
5  * Emilio López <emilio@elopez.com.ar>
6  */
7
8 #include <linux/clk-provider.h>
9 #include <linux/io.h>
10 #include <linux/of.h>
11 #include <linux/of_address.h>
12 #include <linux/slab.h>
13
14 static DEFINE_SPINLOCK(mod1_lock);
15
16 #define SUN4I_MOD1_ENABLE       31
17 #define SUN4I_MOD1_MUX          16
18 #define SUN4I_MOD1_MUX_WIDTH    2
19 #define SUN4I_MOD1_MAX_PARENTS  4
20
21 static void __init sun4i_mod1_clk_setup(struct device_node *node)
22 {
23         struct clk *clk;
24         struct clk_mux *mux;
25         struct clk_gate *gate;
26         const char *parents[4];
27         const char *clk_name = node->name;
28         void __iomem *reg;
29         int i;
30
31         reg = of_io_request_and_map(node, 0, of_node_full_name(node));
32         if (IS_ERR(reg))
33                 return;
34
35         mux = kzalloc(sizeof(*mux), GFP_KERNEL);
36         if (!mux)
37                 goto err_unmap;
38
39         gate = kzalloc(sizeof(*gate), GFP_KERNEL);
40         if (!gate)
41                 goto err_free_mux;
42
43         of_property_read_string(node, "clock-output-names", &clk_name);
44         i = of_clk_parent_fill(node, parents, SUN4I_MOD1_MAX_PARENTS);
45
46         gate->reg = reg;
47         gate->bit_idx = SUN4I_MOD1_ENABLE;
48         gate->lock = &mod1_lock;
49         mux->reg = reg;
50         mux->shift = SUN4I_MOD1_MUX;
51         mux->mask = BIT(SUN4I_MOD1_MUX_WIDTH) - 1;
52         mux->lock = &mod1_lock;
53
54         clk = clk_register_composite(NULL, clk_name, parents, i,
55                                      &mux->hw, &clk_mux_ops,
56                                      NULL, NULL,
57                                      &gate->hw, &clk_gate_ops, CLK_SET_RATE_PARENT);
58         if (IS_ERR(clk))
59                 goto err_free_gate;
60
61         of_clk_add_provider(node, of_clk_src_simple_get, clk);
62
63         return;
64
65 err_free_gate:
66         kfree(gate);
67 err_free_mux:
68         kfree(mux);
69 err_unmap:
70         iounmap(reg);
71 }
72 CLK_OF_DECLARE(sun4i_mod1, "allwinner,sun4i-a10-mod1-clk",
73                sun4i_mod1_clk_setup);