Linux kernel mirror (for testing)
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linux
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
20static 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
27static 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
61static 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 u32 val;
70
71 if (ti_clk_get_reg_addr(node, 0, ®))
72 return;
73
74 if (!of_property_read_u32(node, "ti,bit-shift", &val))
75 enable_bit = val;
76
77 parent_name = of_clk_get_parent_name(node, 0);
78 if (!parent_name) {
79 pr_err("%pOFn must have a parent\n", node);
80 return;
81 }
82
83 name = ti_dt_clk_name(node);
84 clk = _register_interface(node, name, parent_name, ®,
85 enable_bit, ops);
86
87 if (!IS_ERR(clk))
88 of_clk_add_provider(node, of_clk_src_simple_get, clk);
89}
90
91static void __init of_ti_interface_clk_setup(struct device_node *node)
92{
93 _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);
94}
95CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",
96 of_ti_interface_clk_setup);
97
98static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node)
99{
100 _of_ti_interface_clk_setup(node, &clkhwops_iclk);
101}
102CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",
103 of_ti_no_wait_interface_clk_setup);
104
105#ifdef CONFIG_ARCH_OMAP3
106static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node)
107{
108 _of_ti_interface_clk_setup(node,
109 &clkhwops_omap3430es2_iclk_hsotgusb_wait);
110}
111CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",
112 of_ti_hsotgusb_interface_clk_setup);
113
114static void __init of_ti_dss_interface_clk_setup(struct device_node *node)
115{
116 _of_ti_interface_clk_setup(node,
117 &clkhwops_omap3430es2_iclk_dss_usbhost_wait);
118}
119CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",
120 of_ti_dss_interface_clk_setup);
121
122static void __init of_ti_ssi_interface_clk_setup(struct device_node *node)
123{
124 _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);
125}
126CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",
127 of_ti_ssi_interface_clk_setup);
128
129static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node)
130{
131 _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);
132}
133CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",
134 of_ti_am35xx_interface_clk_setup);
135#endif
136
137#ifdef CONFIG_SOC_OMAP2430
138static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node)
139{
140 _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);
141}
142CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",
143 of_ti_omap2430_interface_clk_setup);
144#endif