1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * OMAP interface clock support
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/of.h>
13 #include <linux/of_address.h>
14 #include <linux/clk/ti.h>
15 #include "clock.h"
16
17 #undef pr_fmt
18 #define pr_fmt(fmt) "%s: " fmt, __func__
19
20 static const struct clk_ops ti_interface_clk_ops = {
21 .init = &omap2_init_clk_clkdm,
22 .enable = &omap2_dflt_clk_enable,
23 .disable = &omap2_dflt_clk_disable,
24 .is_enabled = &omap2_dflt_clk_is_enabled,
25 };
26
_register_interface(struct device_node * node,const char * name,const char * parent_name,struct clk_omap_reg * reg,u8 bit_idx,const struct clk_hw_omap_ops * ops)27 static struct clk *_register_interface(struct device_node *node,
28 const char *name,
29 const char *parent_name,
30 struct clk_omap_reg *reg, u8 bit_idx,
31 const struct clk_hw_omap_ops *ops)
32 {
33 struct clk_init_data init = { NULL };
34 struct clk_hw_omap *clk_hw;
35 struct clk *clk;
36
37 clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
38 if (!clk_hw)
39 return ERR_PTR(-ENOMEM);
40
41 clk_hw->hw.init = &init;
42 clk_hw->ops = ops;
43 memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
44 clk_hw->enable_bit = bit_idx;
45
46 init.name = name;
47 init.ops = &ti_interface_clk_ops;
48 init.flags = 0;
49
50 init.num_parents = 1;
51 init.parent_names = &parent_name;
52
53 clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
54
55 if (IS_ERR(clk))
56 kfree(clk_hw);
57
58 return clk;
59 }
60
_of_ti_interface_clk_setup(struct device_node * node,const struct clk_hw_omap_ops * ops)61 static void __init _of_ti_interface_clk_setup(struct device_node *node,
62 const struct clk_hw_omap_ops *ops)
63 {
64 struct clk *clk;
65 const char *parent_name;
66 struct clk_omap_reg reg;
67 u8 enable_bit = 0;
68 const char *name;
69
70 if (ti_clk_get_reg_addr(node, 0, ®))
71 return;
72
73 enable_bit = reg.bit;
74
75 parent_name = of_clk_get_parent_name(node, 0);
76 if (!parent_name) {
77 pr_err("%pOFn must have a parent\n", node);
78 return;
79 }
80
81 name = ti_dt_clk_name(node);
82 clk = _register_interface(node, name, parent_name, ®,
83 enable_bit, ops);
84
85 if (!IS_ERR(clk))
86 of_clk_add_provider(node, of_clk_src_simple_get, clk);
87 }
88
of_ti_interface_clk_setup(struct device_node * node)89 static void __init of_ti_interface_clk_setup(struct device_node *node)
90 {
91 _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);
92 }
93 CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",
94 of_ti_interface_clk_setup);
95
of_ti_no_wait_interface_clk_setup(struct device_node * node)96 static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node)
97 {
98 _of_ti_interface_clk_setup(node, &clkhwops_iclk);
99 }
100 CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",
101 of_ti_no_wait_interface_clk_setup);
102
103 #ifdef CONFIG_ARCH_OMAP3
of_ti_hsotgusb_interface_clk_setup(struct device_node * node)104 static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node)
105 {
106 _of_ti_interface_clk_setup(node,
107 &clkhwops_omap3430es2_iclk_hsotgusb_wait);
108 }
109 CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",
110 of_ti_hsotgusb_interface_clk_setup);
111
of_ti_dss_interface_clk_setup(struct device_node * node)112 static void __init of_ti_dss_interface_clk_setup(struct device_node *node)
113 {
114 _of_ti_interface_clk_setup(node,
115 &clkhwops_omap3430es2_iclk_dss_usbhost_wait);
116 }
117 CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",
118 of_ti_dss_interface_clk_setup);
119
of_ti_ssi_interface_clk_setup(struct device_node * node)120 static void __init of_ti_ssi_interface_clk_setup(struct device_node *node)
121 {
122 _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);
123 }
124 CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",
125 of_ti_ssi_interface_clk_setup);
126
of_ti_am35xx_interface_clk_setup(struct device_node * node)127 static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node)
128 {
129 _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);
130 }
131 CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",
132 of_ti_am35xx_interface_clk_setup);
133 #endif
134
135 #ifdef CONFIG_SOC_OMAP2430
of_ti_omap2430_interface_clk_setup(struct device_node * node)136 static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node)
137 {
138 _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);
139 }
140 CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",
141 of_ti_omap2430_interface_clk_setup);
142 #endif
143