1
2
3
4
5
6#include <linux/io.h>
7#include <linux/clk-provider.h>
8#include <linux/of.h>
9#include <linux/of_address.h>
10#include <linux/delay.h>
11#include <linux/export.h>
12#include <linux/clk/tegra.h>
13
14#include "clk.h"
15#include "clk-id.h"
16
17#define PLLX_BASE 0xe0
18#define PLLX_MISC 0xe4
19#define PLLX_MISC2 0x514
20#define PLLX_MISC3 0x518
21
22#define CCLKG_BURST_POLICY 0x368
23#define CCLKLP_BURST_POLICY 0x370
24#define SCLK_BURST_POLICY 0x028
25#define SYSTEM_CLK_RATE 0x030
26#define SCLK_DIVIDER 0x2c
27
28static DEFINE_SPINLOCK(sysrate_lock);
29
30enum tegra_super_gen {
31 gen4 = 4,
32 gen5,
33};
34
35struct tegra_super_gen_info {
36 enum tegra_super_gen gen;
37 const char **sclk_parents;
38 const char **cclk_g_parents;
39 const char **cclk_lp_parents;
40 int num_sclk_parents;
41 int num_cclk_g_parents;
42 int num_cclk_lp_parents;
43};
44
45static const char *sclk_parents[] = { "clk_m", "pll_c_out1", "pll_p_out4",
46 "pll_p", "pll_p_out2", "unused",
47 "clk_32k", "pll_m_out1" };
48
49static const char *cclk_g_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m",
50 "pll_p", "pll_p_out4", "unused",
51 "unused", "pll_x", "unused", "unused",
52 "unused", "unused", "unused", "unused",
53 "dfllCPU_out" };
54
55static const char *cclk_lp_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m",
56 "pll_p", "pll_p_out4", "unused",
57 "unused", "pll_x", "pll_x_out0" };
58
59static const struct tegra_super_gen_info tegra_super_gen_info_gen4 = {
60 .gen = gen4,
61 .sclk_parents = sclk_parents,
62 .cclk_g_parents = cclk_g_parents,
63 .cclk_lp_parents = cclk_lp_parents,
64 .num_sclk_parents = ARRAY_SIZE(sclk_parents),
65 .num_cclk_g_parents = ARRAY_SIZE(cclk_g_parents),
66 .num_cclk_lp_parents = ARRAY_SIZE(cclk_lp_parents),
67};
68
69static const char *sclk_parents_gen5[] = { "clk_m", "pll_c_out1", "pll_c4_out3",
70 "pll_p", "pll_p_out2", "pll_c4_out1",
71 "clk_32k", "pll_c4_out2" };
72
73static const char *cclk_g_parents_gen5[] = { "clk_m", "unused", "clk_32k", "unused",
74 "pll_p", "pll_p_out4", "unused",
75 "unused", "pll_x", "unused", "unused",
76 "unused", "unused", "unused", "unused",
77 "dfllCPU_out" };
78
79static const char *cclk_lp_parents_gen5[] = { "clk_m", "unused", "clk_32k", "unused",
80 "pll_p", "pll_p_out4", "unused",
81 "unused", "pll_x", "unused", "unused",
82 "unused", "unused", "unused", "unused",
83 "dfllCPU_out" };
84
85static const struct tegra_super_gen_info tegra_super_gen_info_gen5 = {
86 .gen = gen5,
87 .sclk_parents = sclk_parents_gen5,
88 .cclk_g_parents = cclk_g_parents_gen5,
89 .cclk_lp_parents = cclk_lp_parents_gen5,
90 .num_sclk_parents = ARRAY_SIZE(sclk_parents_gen5),
91 .num_cclk_g_parents = ARRAY_SIZE(cclk_g_parents_gen5),
92 .num_cclk_lp_parents = ARRAY_SIZE(cclk_lp_parents_gen5),
93};
94
95static void __init tegra_sclk_init(void __iomem *clk_base,
96 struct tegra_clk *tegra_clks,
97 const struct tegra_super_gen_info *gen_info)
98{
99 struct clk *clk;
100 struct clk **dt_clk;
101
102
103 dt_clk = tegra_lookup_dt_id(tegra_clk_sclk_mux, tegra_clks);
104 if (dt_clk) {
105 clk = tegra_clk_register_super_mux("sclk_mux",
106 gen_info->sclk_parents,
107 gen_info->num_sclk_parents,
108 CLK_SET_RATE_PARENT,
109 clk_base + SCLK_BURST_POLICY,
110 0, 4, 0, 0, NULL);
111 *dt_clk = clk;
112
113
114
115 dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks);
116 if (dt_clk) {
117 clk = clk_register_divider(NULL, "sclk", "sclk_mux",
118 CLK_IS_CRITICAL,
119 clk_base + SCLK_DIVIDER, 0, 8,
120 0, &sysrate_lock);
121 *dt_clk = clk;
122 }
123 } else {
124
125 dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks);
126 if (dt_clk) {
127 clk = tegra_clk_register_super_mux("sclk",
128 gen_info->sclk_parents,
129 gen_info->num_sclk_parents,
130 CLK_SET_RATE_PARENT |
131 CLK_IS_CRITICAL,
132 clk_base + SCLK_BURST_POLICY,
133 0, 4, 0, 0, NULL);
134 *dt_clk = clk;
135 }
136 }
137
138
139 dt_clk = tegra_lookup_dt_id(tegra_clk_hclk, tegra_clks);
140 if (dt_clk) {
141 clk = clk_register_divider(NULL, "hclk_div", "sclk", 0,
142 clk_base + SYSTEM_CLK_RATE, 4, 2, 0,
143 &sysrate_lock);
144 clk = clk_register_gate(NULL, "hclk", "hclk_div",
145 CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
146 clk_base + SYSTEM_CLK_RATE,
147 7, CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
148 *dt_clk = clk;
149 }
150
151
152 dt_clk = tegra_lookup_dt_id(tegra_clk_pclk, tegra_clks);
153 if (!dt_clk)
154 return;
155
156 clk = clk_register_divider(NULL, "pclk_div", "hclk", 0,
157 clk_base + SYSTEM_CLK_RATE, 0, 2, 0,
158 &sysrate_lock);
159 clk = clk_register_gate(NULL, "pclk", "pclk_div", CLK_SET_RATE_PARENT |
160 CLK_IS_CRITICAL, clk_base + SYSTEM_CLK_RATE,
161 3, CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
162 *dt_clk = clk;
163}
164
165static void __init tegra_super_clk_init(void __iomem *clk_base,
166 void __iomem *pmc_base,
167 struct tegra_clk *tegra_clks,
168 struct tegra_clk_pll_params *params,
169 const struct tegra_super_gen_info *gen_info)
170{
171 struct clk *clk;
172 struct clk **dt_clk;
173
174
175 dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_g, tegra_clks);
176 if (dt_clk) {
177 if (gen_info->gen == gen5) {
178 clk = tegra_clk_register_super_mux("cclk_g",
179 gen_info->cclk_g_parents,
180 gen_info->num_cclk_g_parents,
181 CLK_SET_RATE_PARENT,
182 clk_base + CCLKG_BURST_POLICY,
183 0, 4, 8, 0, NULL);
184 } else {
185 clk = tegra_clk_register_super_mux("cclk_g",
186 gen_info->cclk_g_parents,
187 gen_info->num_cclk_g_parents,
188 CLK_SET_RATE_PARENT,
189 clk_base + CCLKG_BURST_POLICY,
190 0, 4, 0, 0, NULL);
191 }
192 *dt_clk = clk;
193 }
194
195
196 dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_lp, tegra_clks);
197 if (dt_clk) {
198 if (gen_info->gen == gen5) {
199 clk = tegra_clk_register_super_mux("cclk_lp",
200 gen_info->cclk_lp_parents,
201 gen_info->num_cclk_lp_parents,
202 CLK_SET_RATE_PARENT,
203 clk_base + CCLKLP_BURST_POLICY,
204 0, 4, 8, 0, NULL);
205 } else {
206 clk = tegra_clk_register_super_mux("cclk_lp",
207 gen_info->cclk_lp_parents,
208 gen_info->num_cclk_lp_parents,
209 CLK_SET_RATE_PARENT,
210 clk_base + CCLKLP_BURST_POLICY,
211 TEGRA_DIVIDER_2, 4, 8, 9, NULL);
212 }
213 *dt_clk = clk;
214 }
215
216 tegra_sclk_init(clk_base, tegra_clks, gen_info);
217
218#if defined(CONFIG_ARCH_TEGRA_114_SOC) || \
219 defined(CONFIG_ARCH_TEGRA_124_SOC) || \
220 defined(CONFIG_ARCH_TEGRA_210_SOC)
221
222 dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x, tegra_clks);
223 if (!dt_clk)
224 return;
225
226#if defined(CONFIG_ARCH_TEGRA_210_SOC)
227 if (gen_info->gen == gen5)
228 clk = tegra_clk_register_pllc_tegra210("pll_x", "pll_ref",
229 clk_base, pmc_base, CLK_IGNORE_UNUSED, params, NULL);
230 else
231#endif
232 clk = tegra_clk_register_pllxc("pll_x", "pll_ref", clk_base,
233 pmc_base, CLK_IGNORE_UNUSED, params, NULL);
234
235 *dt_clk = clk;
236
237
238
239 dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x_out0, tegra_clks);
240 if (!dt_clk)
241 return;
242 clk = clk_register_fixed_factor(NULL, "pll_x_out0", "pll_x",
243 CLK_SET_RATE_PARENT, 1, 2);
244 *dt_clk = clk;
245#endif
246}
247
248void __init tegra_super_clk_gen4_init(void __iomem *clk_base,
249 void __iomem *pmc_base,
250 struct tegra_clk *tegra_clks,
251 struct tegra_clk_pll_params *params)
252{
253 tegra_super_clk_init(clk_base, pmc_base, tegra_clks, params,
254 &tegra_super_gen_info_gen4);
255}
256
257void __init tegra_super_clk_gen5_init(void __iomem *clk_base,
258 void __iomem *pmc_base,
259 struct tegra_clk *tegra_clks,
260 struct tegra_clk_pll_params *params)
261{
262 tegra_super_clk_init(clk_base, pmc_base, tegra_clks, params,
263 &tegra_super_gen_info_gen5);
264}
265
