1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
* Marvell Armada XP SoC clocks
*
* Copyright (C) 2012 Marvell
*
* Gregory CLEMENT <gregory.clement@free-electrons.com>
* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
* Andrew Lunn <andrew@lunn.ch>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/of.h>
#include "common.h"
/*
* Core Clocks
*
* Armada XP Sample At Reset is a 64 bit bitfiled split in two
* register of 32 bits
*/
#define SARL 0 /* Low part [0:31] */
#define SARL_AXP_PCLK_FREQ_OPT 21
#define SARL_AXP_PCLK_FREQ_OPT_MASK 0x7
#define SARL_AXP_FAB_FREQ_OPT 24
#define SARL_AXP_FAB_FREQ_OPT_MASK 0xF
#define SARH 4 /* High part [32:63] */
#define SARH_AXP_PCLK_FREQ_OPT (52-32)
#define SARH_AXP_PCLK_FREQ_OPT_MASK 0x1
#define SARH_AXP_PCLK_FREQ_OPT_SHIFT 3
#define SARH_AXP_FAB_FREQ_OPT (51-32)
#define SARH_AXP_FAB_FREQ_OPT_MASK 0x1
#define SARH_AXP_FAB_FREQ_OPT_SHIFT 4
enum { AXP_CPU_TO_NBCLK, AXP_CPU_TO_HCLK, AXP_CPU_TO_DRAMCLK };
static const struct coreclk_ratio axp_coreclk_ratios[] __initconst = {
{ .id = AXP_CPU_TO_NBCLK, .name = "nbclk" },
{ .id = AXP_CPU_TO_HCLK, .name = "hclk" },
{ .id = AXP_CPU_TO_DRAMCLK, .name = "dramclk" },
};
/* Armada XP TCLK frequency is fixed to 250MHz */
static u32 __init axp_get_tclk_freq(void __iomem *sar)
{
return 250000000;
}
/* MV98DX3236 TCLK frequency is fixed to 200MHz */
static u32 __init mv98dx3236_get_tclk_freq(void __iomem *sar)
{
return 200000000;
}
static const u32 axp_cpu_freqs[] __initconst = {
1000000000,
1066000000,
1200000000,
1333000000,
1500000000,
1666000000,
1800000000,
2000000000,
667000000,
0,
800000000,
1600000000,
};
static u32 __init axp_get_cpu_freq(void __iomem *sar)
{
u32 cpu_freq;
u8 cpu_freq_select = 0;
cpu_freq_select = ((readl(sar + SARL) >> SARL_AXP_PCLK_FREQ_OPT) &
SARL_AXP_PCLK_FREQ_OPT_MASK);
/*
* The upper bit is not contiguous to the other ones and
* located in the high part of the SAR registers
*/
cpu_freq_select |= (((readl(sar + SARH) >> SARH_AXP_PCLK_FREQ_OPT) &
SARH_AXP_PCLK_FREQ_OPT_MASK) << SARH_AXP_PCLK_FREQ_OPT_SHIFT);
if (cpu_freq_select >= ARRAY_SIZE(axp_cpu_freqs)) {
pr_err("CPU freq select unsupported: %d\n", cpu_freq_select);
cpu_freq = 0;
} else
cpu_freq = axp_cpu_freqs[cpu_freq_select];
return cpu_freq;
}
/* MV98DX3236 CLK frequency is fixed to 800MHz */
static u32 __init mv98dx3236_get_cpu_freq(void __iomem *sar)
{
return 800000000;
}
static const int axp_nbclk_ratios[32][2] __initconst = {
{0, 1}, {1, 2}, {2, 2}, {2, 2},
{1, 2}, {1, 2}, {1, 1}, {2, 3},
{0, 1}, {1, 2}, {2, 4}, {0, 1},
{1, 2}, {0, 1}, {0, 1}, {2, 2},
{0, 1}, {0, 1}, {0, 1}, {1, 1},
{2, 3}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {1, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
};
static const int axp_hclk_ratios[32][2] __initconst = {
{0, 1}, {1, 2}, {2, 6}, {2, 3},
{1, 3}, {1, 4}, {1, 2}, {2, 6},
{0, 1}, {1, 6}, {2, 10}, {0, 1},
{1, 4}, {0, 1}, {0, 1}, {2, 5},
{0, 1}, {0, 1}, {0, 1}, {1, 2},
{2, 6}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {1, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
};
static const int axp_dramclk_ratios[32][2] __initconst = {
{0, 1}, {1, 2}, {2, 3}, {2, 3},
{1, 3}, {1, 2}, {1, 2}, {2, 6},
{0, 1}, {1, 3}, {2, 5}, {0, 1},
{1, 4}, {0, 1}, {0, 1}, {2, 5},
{0, 1}, {0, 1}, {0, 1}, {1, 1},
{2, 3}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {1, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
};
static void __init axp_get_clk_ratio(
void __iomem *sar, int id, int *mult, int *div)
{
u32 opt = ((readl(sar + SARL) >> SARL_AXP_FAB_FREQ_OPT) &
SARL_AXP_FAB_FREQ_OPT_MASK);
/*
* The upper bit is not contiguous to the other ones and
* located in the high part of the SAR registers
*/
opt |= (((readl(sar + SARH) >> SARH_AXP_FAB_FREQ_OPT) &
SARH_AXP_FAB_FREQ_OPT_MASK) << SARH_AXP_FAB_FREQ_OPT_SHIFT);
switch (id) {
case AXP_CPU_TO_NBCLK:
*mult = axp_nbclk_ratios[opt][0];
*div = axp_nbclk_ratios[opt][1];
break;
case AXP_CPU_TO_HCLK:
*mult = axp_hclk_ratios[opt][0];
*div = axp_hclk_ratios[opt][1];
break;
case AXP_CPU_TO_DRAMCLK:
*mult = axp_dramclk_ratios[opt][0];
*div = axp_dramclk_ratios[opt][1];
break;
}
}
static const struct coreclk_soc_desc axp_coreclks = {
.get_tclk_freq = axp_get_tclk_freq,
.get_cpu_freq = axp_get_cpu_freq,
.get_clk_ratio = axp_get_clk_ratio,
.ratios = axp_coreclk_ratios,
.num_ratios = ARRAY_SIZE(axp_coreclk_ratios),
};
static const struct coreclk_soc_desc mv98dx3236_coreclks = {
.get_tclk_freq = mv98dx3236_get_tclk_freq,
.get_cpu_freq = mv98dx3236_get_cpu_freq,
};
/*
* Clock Gating Control
*/
static const struct clk_gating_soc_desc axp_gating_desc[] __initconst = {
{ "audio", NULL, 0, 0 },
{ "ge3", NULL, 1, 0 },
{ "ge2", NULL, 2, 0 },
{ "ge1", NULL, 3, 0 },
{ "ge0", NULL, 4, 0 },
{ "pex00", NULL, 5, 0 },
{ "pex01", NULL, 6, 0 },
{ "pex02", NULL, 7, 0 },
{ "pex03", NULL, 8, 0 },
{ "pex10", NULL, 9, 0 },
{ "pex11", NULL, 10, 0 },
{ "pex12", NULL, 11, 0 },
{ "pex13", NULL, 12, 0 },
{ "bp", NULL, 13, 0 },
{ "sata0lnk", NULL, 14, 0 },
{ "sata0", "sata0lnk", 15, 0 },
{ "lcd", NULL, 16, 0 },
{ "sdio", NULL, 17, 0 },
{ "usb0", NULL, 18, 0 },
{ "usb1", NULL, 19, 0 },
{ "usb2", NULL, 20, 0 },
{ "xor0", NULL, 22, 0 },
{ "crypto", NULL, 23, 0 },
{ "tdm", NULL, 25, 0 },
{ "pex20", NULL, 26, 0 },
{ "pex30", NULL, 27, 0 },
{ "xor1", NULL, 28, 0 },
{ "sata1lnk", NULL, 29, 0 },
{ "sata1", "sata1lnk", 30, 0 },
{ }
};
static const struct clk_gating_soc_desc mv98dx3236_gating_desc[] __initconst = {
{ "ge1", NULL, 3, 0 },
{ "ge0", NULL, 4, 0 },
{ "pex00", NULL, 5, 0 },
{ "sdio", NULL, 17, 0 },
{ "xor0", NULL, 22, 0 },
{ }
};
static void __init axp_clk_init(struct device_node *np)
{
struct device_node *cgnp =
of_find_compatible_node(NULL, NULL, "marvell,armada-xp-gating-clock");
mvebu_coreclk_setup(np, &axp_coreclks);
if (cgnp)
mvebu_clk_gating_setup(cgnp, axp_gating_desc);
}
CLK_OF_DECLARE(axp_clk, "marvell,armada-xp-core-clock", axp_clk_init);
|
