tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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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 *dev, const char *name,
28 const char *parent_name,
29 struct clk_omap_reg *reg, u8 bit_idx,
30 const struct clk_hw_omap_ops *ops)
31{
32 struct clk_init_data init = { NULL };
33 struct clk_hw_omap *clk_hw;
34 struct clk *clk;
35
36 clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
37 if (!clk_hw)
38 return ERR_PTR(-ENOMEM);
39
40 clk_hw->hw.init = &init;
41 clk_hw->ops = ops;
42 memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
43 clk_hw->enable_bit = bit_idx;
44
45 init.name = name;
46 init.ops = &ti_interface_clk_ops;
47 init.flags = 0;
48
49 init.num_parents = 1;
50 init.parent_names = &parent_name;
51
52 clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
53
54 if (IS_ERR(clk))
55 kfree(clk_hw);
56
57 return clk;
58}
59
60static void __init _of_ti_interface_clk_setup(struct device_node *node,
61 const struct clk_hw_omap_ops *ops)
62{
63 struct clk *clk;
64 const char *parent_name;
65 struct clk_omap_reg reg;
66 u8 enable_bit = 0;
67 const char *name;
68 u32 val;
69
70 if (ti_clk_get_reg_addr(node, 0, ®))
71 return;
72
73 if (!of_property_read_u32(node, "ti,bit-shift", &val))
74 enable_bit = val;
75
76 parent_name = of_clk_get_parent_name(node, 0);
77 if (!parent_name) {
78 pr_err("%pOFn must have a parent\n", node);
79 return;
80 }
81
82 name = ti_dt_clk_name(node);
83 clk = _register_interface(NULL, name, parent_name, ®,
84 enable_bit, ops);
85
86 if (!IS_ERR(clk))
87 of_clk_add_provider(node, of_clk_src_simple_get, clk);
88}
89
90static void __init of_ti_interface_clk_setup(struct device_node *node)
91{
92 _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);
93}
94CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",
95 of_ti_interface_clk_setup);
96
97static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node)
98{
99 _of_ti_interface_clk_setup(node, &clkhwops_iclk);
100}
101CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",
102 of_ti_no_wait_interface_clk_setup);
103
104#ifdef CONFIG_ARCH_OMAP3
105static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node)
106{
107 _of_ti_interface_clk_setup(node,
108 &clkhwops_omap3430es2_iclk_hsotgusb_wait);
109}
110CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",
111 of_ti_hsotgusb_interface_clk_setup);
112
113static void __init of_ti_dss_interface_clk_setup(struct device_node *node)
114{
115 _of_ti_interface_clk_setup(node,
116 &clkhwops_omap3430es2_iclk_dss_usbhost_wait);
117}
118CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",
119 of_ti_dss_interface_clk_setup);
120
121static void __init of_ti_ssi_interface_clk_setup(struct device_node *node)
122{
123 _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);
124}
125CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",
126 of_ti_ssi_interface_clk_setup);
127
128static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node)
129{
130 _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);
131}
132CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",
133 of_ti_am35xx_interface_clk_setup);
134#endif
135
136#ifdef CONFIG_SOC_OMAP2430
137static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node)
138{
139 _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);
140}
141CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",
142 of_ti_omap2430_interface_clk_setup);
143#endif