1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2013 Emilio López
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Emilio López <emilio@elopez.com.ar>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/clk-provider.h>
9*4882a593Smuzhiyun #include <linux/of.h>
10*4882a593Smuzhiyun #include <linux/of_address.h>
11*4882a593Smuzhiyun #include <linux/slab.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #define SUNXI_OSC24M_GATE 0
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun static DEFINE_SPINLOCK(hosc_lock);
16*4882a593Smuzhiyun
sun4i_osc_clk_setup(struct device_node * node)17*4882a593Smuzhiyun static void __init sun4i_osc_clk_setup(struct device_node *node)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun struct clk *clk;
20*4882a593Smuzhiyun struct clk_fixed_rate *fixed;
21*4882a593Smuzhiyun struct clk_gate *gate;
22*4882a593Smuzhiyun const char *clk_name = node->name;
23*4882a593Smuzhiyun u32 rate;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun if (of_property_read_u32(node, "clock-frequency", &rate))
26*4882a593Smuzhiyun return;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun /* allocate fixed-rate and gate clock structs */
29*4882a593Smuzhiyun fixed = kzalloc(sizeof(struct clk_fixed_rate), GFP_KERNEL);
30*4882a593Smuzhiyun if (!fixed)
31*4882a593Smuzhiyun return;
32*4882a593Smuzhiyun gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL);
33*4882a593Smuzhiyun if (!gate)
34*4882a593Smuzhiyun goto err_free_fixed;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun of_property_read_string(node, "clock-output-names", &clk_name);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun /* set up gate and fixed rate properties */
39*4882a593Smuzhiyun gate->reg = of_iomap(node, 0);
40*4882a593Smuzhiyun gate->bit_idx = SUNXI_OSC24M_GATE;
41*4882a593Smuzhiyun gate->lock = &hosc_lock;
42*4882a593Smuzhiyun fixed->fixed_rate = rate;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun clk = clk_register_composite(NULL, clk_name,
45*4882a593Smuzhiyun NULL, 0,
46*4882a593Smuzhiyun NULL, NULL,
47*4882a593Smuzhiyun &fixed->hw, &clk_fixed_rate_ops,
48*4882a593Smuzhiyun &gate->hw, &clk_gate_ops, 0);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun if (IS_ERR(clk))
51*4882a593Smuzhiyun goto err_free_gate;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun of_clk_add_provider(node, of_clk_src_simple_get, clk);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun return;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun err_free_gate:
58*4882a593Smuzhiyun kfree(gate);
59*4882a593Smuzhiyun err_free_fixed:
60*4882a593Smuzhiyun kfree(fixed);
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun CLK_OF_DECLARE(sun4i_osc, "allwinner,sun4i-a10-osc-clk", sun4i_osc_clk_setup);
63