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24582b34 TK |
1 | /* |
2 | * OMAP interface clock support | |
3 | * | |
4 | * Copyright (C) 2013 Texas Instruments, Inc. | |
5 | * | |
6 | * Tero Kristo <t-kristo@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether express or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/clk-provider.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/of.h> | |
21 | #include <linux/of_address.h> | |
22 | #include <linux/clk/ti.h> | |
23 | ||
24 | #undef pr_fmt | |
25 | #define pr_fmt(fmt) "%s: " fmt, __func__ | |
26 | ||
27 | static const struct clk_ops ti_interface_clk_ops = { | |
28 | .init = &omap2_init_clk_clkdm, | |
29 | .enable = &omap2_dflt_clk_enable, | |
30 | .disable = &omap2_dflt_clk_disable, | |
31 | .is_enabled = &omap2_dflt_clk_is_enabled, | |
32 | }; | |
33 | ||
34 | static void __init _of_ti_interface_clk_setup(struct device_node *node, | |
35 | const struct clk_hw_omap_ops *ops) | |
36 | { | |
37 | struct clk *clk; | |
38 | struct clk_init_data init = { NULL }; | |
39 | struct clk_hw_omap *clk_hw; | |
40 | const char *parent_name; | |
41 | u32 val; | |
42 | ||
43 | clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); | |
44 | if (!clk_hw) | |
45 | return; | |
46 | ||
47 | clk_hw->hw.init = &init; | |
48 | clk_hw->ops = ops; | |
49 | clk_hw->flags = MEMMAP_ADDRESSING; | |
50 | ||
51 | clk_hw->enable_reg = ti_clk_get_reg_addr(node, 0); | |
52 | if (!clk_hw->enable_reg) | |
53 | goto cleanup; | |
54 | ||
55 | if (!of_property_read_u32(node, "ti,bit-shift", &val)) | |
56 | clk_hw->enable_bit = val; | |
57 | ||
58 | init.name = node->name; | |
59 | init.ops = &ti_interface_clk_ops; | |
60 | init.flags = 0; | |
61 | ||
62 | parent_name = of_clk_get_parent_name(node, 0); | |
63 | if (!parent_name) { | |
64 | pr_err("%s must have a parent\n", node->name); | |
65 | goto cleanup; | |
66 | } | |
67 | ||
68 | init.num_parents = 1; | |
69 | init.parent_names = &parent_name; | |
70 | ||
71 | clk = clk_register(NULL, &clk_hw->hw); | |
72 | ||
73 | if (!IS_ERR(clk)) { | |
74 | of_clk_add_provider(node, of_clk_src_simple_get, clk); | |
75 | omap2_init_clk_hw_omap_clocks(clk); | |
76 | return; | |
77 | } | |
78 | ||
79 | cleanup: | |
80 | kfree(clk_hw); | |
81 | } | |
82 | ||
83 | static void __init of_ti_interface_clk_setup(struct device_node *node) | |
84 | { | |
85 | _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait); | |
86 | } | |
87 | CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock", | |
88 | of_ti_interface_clk_setup); | |
89 | ||
90 | static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node) | |
91 | { | |
92 | _of_ti_interface_clk_setup(node, &clkhwops_iclk); | |
93 | } | |
94 | CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock", | |
95 | of_ti_no_wait_interface_clk_setup); | |
96 | ||
97 | static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node) | |
98 | { | |
99 | _of_ti_interface_clk_setup(node, | |
100 | &clkhwops_omap3430es2_iclk_hsotgusb_wait); | |
101 | } | |
102 | CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock", | |
103 | of_ti_hsotgusb_interface_clk_setup); | |
104 | ||
105 | static void __init of_ti_dss_interface_clk_setup(struct device_node *node) | |
106 | { | |
107 | _of_ti_interface_clk_setup(node, | |
108 | &clkhwops_omap3430es2_iclk_dss_usbhost_wait); | |
109 | } | |
110 | CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock", | |
111 | of_ti_dss_interface_clk_setup); | |
112 | ||
113 | static void __init of_ti_ssi_interface_clk_setup(struct device_node *node) | |
114 | { | |
115 | _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait); | |
116 | } | |
117 | CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock", | |
118 | of_ti_ssi_interface_clk_setup); | |
119 | ||
120 | static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node) | |
121 | { | |
122 | _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait); | |
123 | } | |
124 | CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock", | |
125 | of_ti_am35xx_interface_clk_setup); |