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a7c8485a PDS |
1 | /* |
2 | * Copyright (c) 2012, 2013, NVIDIA CORPORATION. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | */ | |
16 | ||
17 | #include <linux/io.h> | |
a7c8485a PDS |
18 | #include <linux/clk-provider.h> |
19 | #include <linux/of.h> | |
20 | #include <linux/of_address.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/export.h> | |
23 | #include <linux/clk/tegra.h> | |
24 | ||
25 | #include "clk.h" | |
26 | #include "clk-id.h" | |
27 | ||
28 | #define PLLX_BASE 0xe0 | |
29 | #define PLLX_MISC 0xe4 | |
30 | #define PLLX_MISC2 0x514 | |
31 | #define PLLX_MISC3 0x518 | |
32 | ||
33 | #define CCLKG_BURST_POLICY 0x368 | |
34 | #define CCLKLP_BURST_POLICY 0x370 | |
35 | #define SCLK_BURST_POLICY 0x028 | |
36 | #define SYSTEM_CLK_RATE 0x030 | |
37 | ||
38 | static DEFINE_SPINLOCK(sysrate_lock); | |
39 | ||
40 | static const char *sclk_parents[] = { "clk_m", "pll_c_out1", "pll_p_out4", | |
41 | "pll_p", "pll_p_out2", "unused", | |
42 | "clk_32k", "pll_m_out1" }; | |
43 | ||
44 | static const char *cclk_g_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m", | |
45 | "pll_p", "pll_p_out4", "unused", | |
79cf95c7 TT |
46 | "unused", "pll_x", "unused", "unused", |
47 | "unused", "unused", "unused", "unused", | |
48 | "dfllCPU_out" }; | |
a7c8485a PDS |
49 | |
50 | static const char *cclk_lp_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m", | |
51 | "pll_p", "pll_p_out4", "unused", | |
52 | "unused", "pll_x", "pll_x_out0" }; | |
53 | ||
54 | static void __init tegra_sclk_init(void __iomem *clk_base, | |
55 | struct tegra_clk *tegra_clks) | |
56 | { | |
57 | struct clk *clk; | |
58 | struct clk **dt_clk; | |
59 | ||
60 | /* SCLK */ | |
61 | dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks); | |
62 | if (dt_clk) { | |
63 | clk = tegra_clk_register_super_mux("sclk", sclk_parents, | |
64 | ARRAY_SIZE(sclk_parents), | |
65 | CLK_SET_RATE_PARENT, | |
66 | clk_base + SCLK_BURST_POLICY, | |
67 | 0, 4, 0, 0, NULL); | |
68 | *dt_clk = clk; | |
69 | } | |
70 | ||
71 | /* HCLK */ | |
72 | dt_clk = tegra_lookup_dt_id(tegra_clk_hclk, tegra_clks); | |
73 | if (dt_clk) { | |
74 | clk = clk_register_divider(NULL, "hclk_div", "sclk", 0, | |
75 | clk_base + SYSTEM_CLK_RATE, 4, 2, 0, | |
76 | &sysrate_lock); | |
77 | clk = clk_register_gate(NULL, "hclk", "hclk_div", | |
78 | CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, | |
79 | clk_base + SYSTEM_CLK_RATE, | |
80 | 7, CLK_GATE_SET_TO_DISABLE, &sysrate_lock); | |
81 | *dt_clk = clk; | |
82 | } | |
83 | ||
84 | /* PCLK */ | |
85 | dt_clk = tegra_lookup_dt_id(tegra_clk_pclk, tegra_clks); | |
86 | if (!dt_clk) | |
87 | return; | |
88 | ||
89 | clk = clk_register_divider(NULL, "pclk_div", "hclk", 0, | |
90 | clk_base + SYSTEM_CLK_RATE, 0, 2, 0, | |
91 | &sysrate_lock); | |
92 | clk = clk_register_gate(NULL, "pclk", "pclk_div", CLK_SET_RATE_PARENT | | |
93 | CLK_IGNORE_UNUSED, clk_base + SYSTEM_CLK_RATE, | |
94 | 3, CLK_GATE_SET_TO_DISABLE, &sysrate_lock); | |
95 | *dt_clk = clk; | |
96 | } | |
97 | ||
98 | void __init tegra_super_clk_gen4_init(void __iomem *clk_base, | |
99 | void __iomem *pmc_base, | |
100 | struct tegra_clk *tegra_clks, | |
101 | struct tegra_clk_pll_params *params) | |
102 | { | |
103 | struct clk *clk; | |
104 | struct clk **dt_clk; | |
105 | ||
106 | /* CCLKG */ | |
107 | dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_g, tegra_clks); | |
108 | if (dt_clk) { | |
109 | clk = tegra_clk_register_super_mux("cclk_g", cclk_g_parents, | |
110 | ARRAY_SIZE(cclk_g_parents), | |
111 | CLK_SET_RATE_PARENT, | |
112 | clk_base + CCLKG_BURST_POLICY, | |
113 | 0, 4, 0, 0, NULL); | |
114 | *dt_clk = clk; | |
115 | } | |
116 | ||
117 | /* CCLKLP */ | |
118 | dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_lp, tegra_clks); | |
119 | if (dt_clk) { | |
120 | clk = tegra_clk_register_super_mux("cclk_lp", cclk_lp_parents, | |
121 | ARRAY_SIZE(cclk_lp_parents), | |
122 | CLK_SET_RATE_PARENT, | |
123 | clk_base + CCLKLP_BURST_POLICY, | |
88b4bd70 | 124 | TEGRA_DIVIDER_2, 4, 8, 9, NULL); |
a7c8485a PDS |
125 | *dt_clk = clk; |
126 | } | |
127 | ||
128 | tegra_sclk_init(clk_base, tegra_clks); | |
129 | ||
130 | #if defined(CONFIG_ARCH_TEGRA_114_SOC) || defined(CONFIG_ARCH_TEGRA_124_SOC) | |
131 | /* PLLX */ | |
132 | dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x, tegra_clks); | |
133 | if (!dt_clk) | |
134 | return; | |
135 | ||
136 | clk = tegra_clk_register_pllxc("pll_x", "pll_ref", clk_base, | |
137 | pmc_base, CLK_IGNORE_UNUSED, params, NULL); | |
138 | *dt_clk = clk; | |
139 | ||
140 | /* PLLX_OUT0 */ | |
141 | ||
142 | dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x_out0, tegra_clks); | |
143 | if (!dt_clk) | |
144 | return; | |
145 | clk = clk_register_fixed_factor(NULL, "pll_x_out0", "pll_x", | |
146 | CLK_SET_RATE_PARENT, 1, 2); | |
147 | *dt_clk = clk; | |
148 | #endif | |
149 | } | |
150 |