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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> | |
06524fa4 | 23 | #include "clock.h" |
24582b34 TK |
24 | |
25 | #undef pr_fmt | |
26 | #define pr_fmt(fmt) "%s: " fmt, __func__ | |
27 | ||
28 | static const struct clk_ops ti_interface_clk_ops = { | |
29 | .init = &omap2_init_clk_clkdm, | |
30 | .enable = &omap2_dflt_clk_enable, | |
31 | .disable = &omap2_dflt_clk_disable, | |
32 | .is_enabled = &omap2_dflt_clk_is_enabled, | |
33 | }; | |
34 | ||
06524fa4 TK |
35 | static struct clk *_register_interface(struct device *dev, const char *name, |
36 | const char *parent_name, | |
6c0afb50 | 37 | struct clk_omap_reg *reg, u8 bit_idx, |
06524fa4 | 38 | const struct clk_hw_omap_ops *ops) |
24582b34 | 39 | { |
24582b34 TK |
40 | struct clk_init_data init = { NULL }; |
41 | struct clk_hw_omap *clk_hw; | |
06524fa4 | 42 | struct clk *clk; |
24582b34 TK |
43 | |
44 | clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); | |
45 | if (!clk_hw) | |
06524fa4 | 46 | return ERR_PTR(-ENOMEM); |
24582b34 TK |
47 | |
48 | clk_hw->hw.init = &init; | |
49 | clk_hw->ops = ops; | |
6c0afb50 | 50 | memcpy(&clk_hw->enable_reg, reg, sizeof(*reg)); |
06524fa4 | 51 | clk_hw->enable_bit = bit_idx; |
24582b34 | 52 | |
06524fa4 | 53 | init.name = name; |
24582b34 TK |
54 | init.ops = &ti_interface_clk_ops; |
55 | init.flags = 0; | |
56 | ||
24582b34 TK |
57 | init.num_parents = 1; |
58 | init.parent_names = &parent_name; | |
59 | ||
ead47825 | 60 | clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name); |
24582b34 | 61 | |
06524fa4 TK |
62 | if (IS_ERR(clk)) |
63 | kfree(clk_hw); | |
06524fa4 TK |
64 | |
65 | return clk; | |
66 | } | |
67 | ||
06524fa4 TK |
68 | static void __init _of_ti_interface_clk_setup(struct device_node *node, |
69 | const struct clk_hw_omap_ops *ops) | |
70 | { | |
71 | struct clk *clk; | |
72 | const char *parent_name; | |
6c0afb50 | 73 | struct clk_omap_reg reg; |
06524fa4 TK |
74 | u8 enable_bit = 0; |
75 | u32 val; | |
76 | ||
6c0afb50 | 77 | if (ti_clk_get_reg_addr(node, 0, ®)) |
06524fa4 TK |
78 | return; |
79 | ||
80 | if (!of_property_read_u32(node, "ti,bit-shift", &val)) | |
81 | enable_bit = val; | |
82 | ||
83 | parent_name = of_clk_get_parent_name(node, 0); | |
84 | if (!parent_name) { | |
e665f029 | 85 | pr_err("%pOFn must have a parent\n", node); |
24582b34 TK |
86 | return; |
87 | } | |
88 | ||
6c0afb50 | 89 | clk = _register_interface(NULL, node->name, parent_name, ®, |
06524fa4 TK |
90 | enable_bit, ops); |
91 | ||
92 | if (!IS_ERR(clk)) | |
93 | of_clk_add_provider(node, of_clk_src_simple_get, clk); | |
24582b34 TK |
94 | } |
95 | ||
96 | static void __init of_ti_interface_clk_setup(struct device_node *node) | |
97 | { | |
98 | _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait); | |
99 | } | |
100 | CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock", | |
101 | of_ti_interface_clk_setup); | |
102 | ||
103 | static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node) | |
104 | { | |
105 | _of_ti_interface_clk_setup(node, &clkhwops_iclk); | |
106 | } | |
107 | CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock", | |
108 | of_ti_no_wait_interface_clk_setup); | |
109 | ||
de742570 | 110 | #ifdef CONFIG_ARCH_OMAP3 |
24582b34 TK |
111 | static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node) |
112 | { | |
113 | _of_ti_interface_clk_setup(node, | |
114 | &clkhwops_omap3430es2_iclk_hsotgusb_wait); | |
115 | } | |
116 | CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock", | |
117 | of_ti_hsotgusb_interface_clk_setup); | |
118 | ||
119 | static void __init of_ti_dss_interface_clk_setup(struct device_node *node) | |
120 | { | |
121 | _of_ti_interface_clk_setup(node, | |
122 | &clkhwops_omap3430es2_iclk_dss_usbhost_wait); | |
123 | } | |
124 | CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock", | |
125 | of_ti_dss_interface_clk_setup); | |
126 | ||
127 | static void __init of_ti_ssi_interface_clk_setup(struct device_node *node) | |
128 | { | |
129 | _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait); | |
130 | } | |
131 | CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock", | |
132 | of_ti_ssi_interface_clk_setup); | |
133 | ||
134 | static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node) | |
135 | { | |
136 | _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait); | |
137 | } | |
138 | CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock", | |
139 | of_ti_am35xx_interface_clk_setup); | |
de742570 TK |
140 | #endif |
141 | ||
142 | #ifdef CONFIG_SOC_OMAP2430 | |
143 | static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node) | |
144 | { | |
145 | _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait); | |
146 | } | |
147 | CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock", | |
148 | of_ti_omap2430_interface_clk_setup); | |
149 | #endif |