xref: /linux/drivers/clk/ti/interface.c (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
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, &reg))
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, &reg,
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