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
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/clk-provider.h>
#include <linux/mfd/syscon.h>
#include <linux/slab.h>
#include <dt-bindings/clock/at91.h>
#include "pmc.h"
static const struct clk_master_characteristics mck_characteristics = {
.output = { .min = 0, .max = 133333333 },
.divisors = { 1, 2, 4, 3 },
};
static u8 plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 };
static u16 plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 };
static const struct clk_range plla_outputs[] = {
{ .min = 745000000, .max = 800000000 },
{ .min = 695000000, .max = 750000000 },
{ .min = 645000000, .max = 700000000 },
{ .min = 595000000, .max = 650000000 },
{ .min = 545000000, .max = 600000000 },
{ .min = 495000000, .max = 555000000 },
{ .min = 445000000, .max = 500000000 },
{ .min = 400000000, .max = 450000000 },
};
static const struct clk_pll_characteristics plla_characteristics = {
.input = { .min = 2000000, .max = 32000000 },
.num_output = ARRAY_SIZE(plla_outputs),
.output = plla_outputs,
.icpll = plla_icpll,
.out = plla_out,
};
static const struct {
char *n;
char *p;
u8 id;
} at91sam9g45_systemck[] = {
{ .n = "ddrck", .p = "masterck", .id = 2 },
{ .n = "uhpck", .p = "usbck", .id = 6 },
{ .n = "pck0", .p = "prog0", .id = 8 },
{ .n = "pck1", .p = "prog1", .id = 9 },
};
static const struct clk_pcr_layout at91sam9g45_pcr_layout = {
.offset = 0x10c,
.cmd = BIT(12),
.pid_mask = GENMASK(5, 0),
.div_mask = GENMASK(17, 16),
};
struct pck {
char *n;
u8 id;
};
static const struct pck at91sam9g45_periphck[] = {
{ .n = "pioA_clk", .id = 2, },
{ .n = "pioB_clk", .id = 3, },
{ .n = "pioC_clk", .id = 4, },
{ .n = "pioDE_clk", .id = 5, },
{ .n = "trng_clk", .id = 6, },
{ .n = "usart0_clk", .id = 7, },
{ .n = "usart1_clk", .id = 8, },
{ .n = "usart2_clk", .id = 9, },
{ .n = "usart3_clk", .id = 10, },
{ .n = "mci0_clk", .id = 11, },
{ .n = "twi0_clk", .id = 12, },
{ .n = "twi1_clk", .id = 13, },
{ .n = "spi0_clk", .id = 14, },
{ .n = "spi1_clk", .id = 15, },
{ .n = "ssc0_clk", .id = 16, },
{ .n = "ssc1_clk", .id = 17, },
{ .n = "tcb0_clk", .id = 18, },
{ .n = "pwm_clk", .id = 19, },
{ .n = "adc_clk", .id = 20, },
{ .n = "dma0_clk", .id = 21, },
{ .n = "uhphs_clk", .id = 22, },
{ .n = "lcd_clk", .id = 23, },
{ .n = "ac97_clk", .id = 24, },
{ .n = "macb0_clk", .id = 25, },
{ .n = "isi_clk", .id = 26, },
{ .n = "udphs_clk", .id = 27, },
{ .n = "aestdessha_clk", .id = 28, },
{ .n = "mci1_clk", .id = 29, },
{ .n = "vdec_clk", .id = 30, },
};
static void __init at91sam9g45_pmc_setup(struct device_node *np)
{
const char *slck_name, *mainxtal_name;
struct pmc_data *at91sam9g45_pmc;
const char *parent_names[6];
struct regmap *regmap;
struct clk_hw *hw;
int i;
bool bypass;
i = of_property_match_string(np, "clock-names", "slow_clk");
if (i < 0)
return;
slck_name = of_clk_get_parent_name(np, i);
i = of_property_match_string(np, "clock-names", "main_xtal");
if (i < 0)
return;
mainxtal_name = of_clk_get_parent_name(np, i);
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap))
return;
at91sam9g45_pmc = pmc_data_allocate(PMC_MAIN + 1,
nck(at91sam9g45_systemck),
nck(at91sam9g45_periphck), 0);
if (!at91sam9g45_pmc)
return;
bypass = of_property_read_bool(np, "atmel,osc-bypass");
hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
bypass);
if (IS_ERR(hw))
goto err_free;
hw = at91_clk_register_rm9200_main(regmap, "mainck", "main_osc");
if (IS_ERR(hw))
goto err_free;
at91sam9g45_pmc->chws[PMC_MAIN] = hw;
hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
&at91rm9200_pll_layout, &plla_characteristics);
if (IS_ERR(hw))
goto err_free;
hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack");
if (IS_ERR(hw))
goto err_free;
hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
if (IS_ERR(hw))
goto err_free;
at91sam9g45_pmc->chws[PMC_UTMI] = hw;
parent_names[0] = slck_name;
parent_names[1] = "mainck";
parent_names[2] = "plladivck";
parent_names[3] = "utmick";
hw = at91_clk_register_master(regmap, "masterck", 4, parent_names,
&at91rm9200_master_layout,
&mck_characteristics);
if (IS_ERR(hw))
goto err_free;
at91sam9g45_pmc->chws[PMC_MCK] = hw;
parent_names[0] = "plladivck";
parent_names[1] = "utmick";
hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2);
if (IS_ERR(hw))
goto err_free;
parent_names[0] = slck_name;
parent_names[1] = "mainck";
parent_names[2] = "plladivck";
parent_names[3] = "utmick";
parent_names[4] = "masterck";
for (i = 0; i < 2; i++) {
char name[6];
snprintf(name, sizeof(name), "prog%d", i);
hw = at91_clk_register_programmable(regmap, name,
parent_names, 5, i,
&at91sam9g45_programmable_layout);
if (IS_ERR(hw))
goto err_free;
}
for (i = 0; i < ARRAY_SIZE(at91sam9g45_systemck); i++) {
hw = at91_clk_register_system(regmap, at91sam9g45_systemck[i].n,
at91sam9g45_systemck[i].p,
at91sam9g45_systemck[i].id);
if (IS_ERR(hw))
goto err_free;
at91sam9g45_pmc->shws[at91sam9g45_systemck[i].id] = hw;
}
for (i = 0; i < ARRAY_SIZE(at91sam9g45_periphck); i++) {
hw = at91_clk_register_peripheral(regmap,
at91sam9g45_periphck[i].n,
"masterck",
at91sam9g45_periphck[i].id);
if (IS_ERR(hw))
goto err_free;
at91sam9g45_pmc->phws[at91sam9g45_periphck[i].id] = hw;
}
of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9g45_pmc);
return;
err_free:
pmc_data_free(at91sam9g45_pmc);
}
/*
* The TCB is used as the clocksource so its clock is needed early. This means
* this can't be a platform driver.
*/
CLK_OF_DECLARE_DRIVER(at91sam9g45_pmc, "atmel,at91sam9g45-pmc",
at91sam9g45_pmc_setup);
|
