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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, | |
37 | void __iomem *reg, u8 bit_idx, | |
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; | |
50 | clk_hw->flags = MEMMAP_ADDRESSING; | |
06524fa4 TK |
51 | clk_hw->enable_reg = reg; |
52 | clk_hw->enable_bit = bit_idx; | |
24582b34 | 53 | |
06524fa4 | 54 | init.name = name; |
24582b34 TK |
55 | init.ops = &ti_interface_clk_ops; |
56 | init.flags = 0; | |
57 | ||
24582b34 TK |
58 | init.num_parents = 1; |
59 | init.parent_names = &parent_name; | |
60 | ||
61 | clk = clk_register(NULL, &clk_hw->hw); | |
62 | ||
06524fa4 TK |
63 | if (IS_ERR(clk)) |
64 | kfree(clk_hw); | |
65 | else | |
98d8a60e | 66 | omap2_init_clk_hw_omap_clocks(&clk_hw->hw); |
06524fa4 TK |
67 | |
68 | return clk; | |
69 | } | |
70 | ||
6793a30a | 71 | #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS) |
06524fa4 TK |
72 | struct clk *ti_clk_register_interface(struct ti_clk *setup) |
73 | { | |
74 | const struct clk_hw_omap_ops *ops = &clkhwops_iclk_wait; | |
75 | u32 reg; | |
76 | struct clk_omap_reg *reg_setup; | |
77 | struct ti_clk_gate *gate; | |
78 | ||
79 | gate = setup->data; | |
80 | reg_setup = (struct clk_omap_reg *)® | |
81 | reg_setup->index = gate->module; | |
82 | reg_setup->offset = gate->reg; | |
83 | ||
84 | if (gate->flags & CLKF_NO_WAIT) | |
85 | ops = &clkhwops_iclk; | |
86 | ||
87 | if (gate->flags & CLKF_HSOTGUSB) | |
88 | ops = &clkhwops_omap3430es2_iclk_hsotgusb_wait; | |
89 | ||
90 | if (gate->flags & CLKF_DSS) | |
91 | ops = &clkhwops_omap3430es2_iclk_dss_usbhost_wait; | |
92 | ||
93 | if (gate->flags & CLKF_SSI) | |
94 | ops = &clkhwops_omap3430es2_iclk_ssi_wait; | |
95 | ||
96 | if (gate->flags & CLKF_AM35XX) | |
97 | ops = &clkhwops_am35xx_ipss_wait; | |
98 | ||
99 | return _register_interface(NULL, setup->name, gate->parent, | |
100 | (void __iomem *)reg, gate->bit_shift, ops); | |
101 | } | |
6793a30a | 102 | #endif |
06524fa4 TK |
103 | |
104 | static void __init _of_ti_interface_clk_setup(struct device_node *node, | |
105 | const struct clk_hw_omap_ops *ops) | |
106 | { | |
107 | struct clk *clk; | |
108 | const char *parent_name; | |
109 | void __iomem *reg; | |
110 | u8 enable_bit = 0; | |
111 | u32 val; | |
112 | ||
113 | reg = ti_clk_get_reg_addr(node, 0); | |
c807dbed | 114 | if (IS_ERR(reg)) |
06524fa4 TK |
115 | return; |
116 | ||
117 | if (!of_property_read_u32(node, "ti,bit-shift", &val)) | |
118 | enable_bit = val; | |
119 | ||
120 | parent_name = of_clk_get_parent_name(node, 0); | |
121 | if (!parent_name) { | |
122 | pr_err("%s must have a parent\n", node->name); | |
24582b34 TK |
123 | return; |
124 | } | |
125 | ||
06524fa4 TK |
126 | clk = _register_interface(NULL, node->name, parent_name, reg, |
127 | enable_bit, ops); | |
128 | ||
129 | if (!IS_ERR(clk)) | |
130 | of_clk_add_provider(node, of_clk_src_simple_get, clk); | |
24582b34 TK |
131 | } |
132 | ||
133 | static void __init of_ti_interface_clk_setup(struct device_node *node) | |
134 | { | |
135 | _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait); | |
136 | } | |
137 | CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock", | |
138 | of_ti_interface_clk_setup); | |
139 | ||
140 | static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node) | |
141 | { | |
142 | _of_ti_interface_clk_setup(node, &clkhwops_iclk); | |
143 | } | |
144 | CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock", | |
145 | of_ti_no_wait_interface_clk_setup); | |
146 | ||
de742570 | 147 | #ifdef CONFIG_ARCH_OMAP3 |
24582b34 TK |
148 | static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node) |
149 | { | |
150 | _of_ti_interface_clk_setup(node, | |
151 | &clkhwops_omap3430es2_iclk_hsotgusb_wait); | |
152 | } | |
153 | CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock", | |
154 | of_ti_hsotgusb_interface_clk_setup); | |
155 | ||
156 | static void __init of_ti_dss_interface_clk_setup(struct device_node *node) | |
157 | { | |
158 | _of_ti_interface_clk_setup(node, | |
159 | &clkhwops_omap3430es2_iclk_dss_usbhost_wait); | |
160 | } | |
161 | CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock", | |
162 | of_ti_dss_interface_clk_setup); | |
163 | ||
164 | static void __init of_ti_ssi_interface_clk_setup(struct device_node *node) | |
165 | { | |
166 | _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait); | |
167 | } | |
168 | CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock", | |
169 | of_ti_ssi_interface_clk_setup); | |
170 | ||
171 | static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node) | |
172 | { | |
173 | _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait); | |
174 | } | |
175 | CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock", | |
176 | of_ti_am35xx_interface_clk_setup); | |
de742570 TK |
177 | #endif |
178 | ||
179 | #ifdef CONFIG_SOC_OMAP2430 | |
180 | static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node) | |
181 | { | |
182 | _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait); | |
183 | } | |
184 | CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock", | |
185 | of_ti_omap2430_interface_clk_setup); | |
186 | #endif |