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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/clk-provider.h>
3#include <linux/mfd/syscon.h>
4#include <linux/slab.h>
5
6#include <dt-bindings/clock/at91.h>
7
8#include "pmc.h"
9
10static const struct clk_master_characteristics sam9rl_mck_characteristics = {
11 .output = { .min = 0, .max = 94000000 },
12 .divisors = { 1, 2, 4, 0 },
13};
14
15static u8 sam9rl_plla_out[] = { 0, 2 };
16
17static struct clk_range sam9rl_plla_outputs[] = {
18 { .min = 80000000, .max = 200000000 },
19 { .min = 190000000, .max = 240000000 },
20};
21
22static const struct clk_pll_characteristics sam9rl_plla_characteristics = {
23 .input = { .min = 1000000, .max = 32000000 },
24 .num_output = ARRAY_SIZE(sam9rl_plla_outputs),
25 .output = sam9rl_plla_outputs,
26 .out = sam9rl_plla_out,
27};
28
29static const struct {
30 char *n;
31 char *p;
32 u8 id;
33} at91sam9rl_systemck[] = {
34 { .n = "pck0", .p = "prog0", .id = 8 },
35 { .n = "pck1", .p = "prog1", .id = 9 },
36};
37
38static const struct {
39 char *n;
40 u8 id;
41} at91sam9rl_periphck[] = {
42 { .n = "pioA_clk", .id = 2, },
43 { .n = "pioB_clk", .id = 3, },
44 { .n = "pioC_clk", .id = 4, },
45 { .n = "pioD_clk", .id = 5, },
46 { .n = "usart0_clk", .id = 6, },
47 { .n = "usart1_clk", .id = 7, },
48 { .n = "usart2_clk", .id = 8, },
49 { .n = "usart3_clk", .id = 9, },
50 { .n = "mci0_clk", .id = 10, },
51 { .n = "twi0_clk", .id = 11, },
52 { .n = "twi1_clk", .id = 12, },
53 { .n = "spi0_clk", .id = 13, },
54 { .n = "ssc0_clk", .id = 14, },
55 { .n = "ssc1_clk", .id = 15, },
56 { .n = "tc0_clk", .id = 16, },
57 { .n = "tc1_clk", .id = 17, },
58 { .n = "tc2_clk", .id = 18, },
59 { .n = "pwm_clk", .id = 19, },
60 { .n = "adc_clk", .id = 20, },
61 { .n = "dma0_clk", .id = 21, },
62 { .n = "udphs_clk", .id = 22, },
63 { .n = "lcd_clk", .id = 23, },
64};
65
66static void __init at91sam9rl_pmc_setup(struct device_node *np)
67{
68 const char *slck_name, *mainxtal_name;
69 struct pmc_data *at91sam9rl_pmc;
70 const char *parent_names[6];
71 struct regmap *regmap;
72 struct clk_hw *hw;
73 int i;
74
75 i = of_property_match_string(np, "clock-names", "slow_clk");
76 if (i < 0)
77 return;
78
79 slck_name = of_clk_get_parent_name(np, i);
80
81 i = of_property_match_string(np, "clock-names", "main_xtal");
82 if (i < 0)
83 return;
84 mainxtal_name = of_clk_get_parent_name(np, i);
85
86 regmap = syscon_node_to_regmap(np);
87 if (IS_ERR(regmap))
88 return;
89
90 at91sam9rl_pmc = pmc_data_allocate(PMC_MAIN + 1,
91 nck(at91sam9rl_systemck),
92 nck(at91sam9rl_periphck), 0);
93 if (!at91sam9rl_pmc)
94 return;
95
96 hw = at91_clk_register_rm9200_main(regmap, "mainck", mainxtal_name);
97 if (IS_ERR(hw))
98 goto err_free;
99
100 at91sam9rl_pmc->chws[PMC_MAIN] = hw;
101
102 hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
103 &at91rm9200_pll_layout,
104 &sam9rl_plla_characteristics);
105 if (IS_ERR(hw))
106 goto err_free;
107
108 hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
109 if (IS_ERR(hw))
110 goto err_free;
111
112 at91sam9rl_pmc->chws[PMC_UTMI] = hw;
113
114 parent_names[0] = slck_name;
115 parent_names[1] = "mainck";
116 parent_names[2] = "pllack";
117 parent_names[3] = "utmick";
118 hw = at91_clk_register_master(regmap, "masterck", 4, parent_names,
119 &at91rm9200_master_layout,
120 &sam9rl_mck_characteristics);
121 if (IS_ERR(hw))
122 goto err_free;
123
124 at91sam9rl_pmc->chws[PMC_MCK] = hw;
125
126 parent_names[0] = slck_name;
127 parent_names[1] = "mainck";
128 parent_names[2] = "pllack";
129 parent_names[3] = "utmick";
130 parent_names[4] = "masterck";
131 for (i = 0; i < 2; i++) {
132 char name[6];
133
134 snprintf(name, sizeof(name), "prog%d", i);
135
136 hw = at91_clk_register_programmable(regmap, name,
137 parent_names, 5, i,
138 &at91rm9200_programmable_layout);
139 if (IS_ERR(hw))
140 goto err_free;
141 }
142
143 for (i = 0; i < ARRAY_SIZE(at91sam9rl_systemck); i++) {
144 hw = at91_clk_register_system(regmap, at91sam9rl_systemck[i].n,
145 at91sam9rl_systemck[i].p,
146 at91sam9rl_systemck[i].id);
147 if (IS_ERR(hw))
148 goto err_free;
149
150 at91sam9rl_pmc->shws[at91sam9rl_systemck[i].id] = hw;
151 }
152
153 for (i = 0; i < ARRAY_SIZE(at91sam9rl_periphck); i++) {
154 hw = at91_clk_register_peripheral(regmap,
155 at91sam9rl_periphck[i].n,
156 "masterck",
157 at91sam9rl_periphck[i].id);
158 if (IS_ERR(hw))
159 goto err_free;
160
161 at91sam9rl_pmc->phws[at91sam9rl_periphck[i].id] = hw;
162 }
163
164 of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9rl_pmc);
165
166 return;
167
168err_free:
169 pmc_data_free(at91sam9rl_pmc);
170}
171CLK_OF_DECLARE_DRIVER(at91sam9rl_pmc, "atmel,at91sam9rl-pmc", at91sam9rl_pmc_setup);
172

Warning: That file was not part of the compilation database. It may have many parsing errors.