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 | |
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(size: sizeof(*clk_hw), GFP_KERNEL); |
38 | if (!clk_hw) |
39 | return ERR_PTR(error: -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, hw: &clk_hw->hw, con: name); |
54 | |
55 | if (IS_ERR(ptr: clk)) |
56 | kfree(objp: clk_hw); |
57 | |
58 | return clk; |
59 | } |
60 | |
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 | u32 val; |
70 | |
71 | if (ti_clk_get_reg_addr(node, index: 0, reg: ®)) |
72 | return; |
73 | |
74 | if (!of_property_read_u32(np: node, propname: "ti,bit-shift" , out_value: &val)) |
75 | enable_bit = val; |
76 | |
77 | parent_name = of_clk_get_parent_name(np: node, index: 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(np: node); |
84 | clk = _register_interface(node, name, parent_name, reg: ®, |
85 | bit_idx: enable_bit, ops); |
86 | |
87 | if (!IS_ERR(ptr: clk)) |
88 | of_clk_add_provider(np: node, clk_src_get: of_clk_src_simple_get, data: clk); |
89 | } |
90 | |
91 | static void __init of_ti_interface_clk_setup(struct device_node *node) |
92 | { |
93 | _of_ti_interface_clk_setup(node, ops: &clkhwops_iclk_wait); |
94 | } |
95 | CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock" , |
96 | of_ti_interface_clk_setup); |
97 | |
98 | static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node) |
99 | { |
100 | _of_ti_interface_clk_setup(node, ops: &clkhwops_iclk); |
101 | } |
102 | CLK_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 |
106 | static 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 | } |
111 | CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock" , |
112 | of_ti_hsotgusb_interface_clk_setup); |
113 | |
114 | static 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 | } |
119 | CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock" , |
120 | of_ti_dss_interface_clk_setup); |
121 | |
122 | static 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 | } |
126 | CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock" , |
127 | of_ti_ssi_interface_clk_setup); |
128 | |
129 | static 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 | } |
133 | CLK_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 |
138 | static 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 | } |
142 | CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock" , |
143 | of_ti_omap2430_interface_clk_setup); |
144 | #endif |
145 | |