1
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 mck_characteristics = {
11 .output = { .min = 0, .max = 133333333 },
12 .divisors = { 1, 2, 4, 3 },
13 .have_div3_pres = 1,
14};
15
16static u8 plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 };
17
18static u16 plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 };
19
20static const struct clk_range plla_outputs[] = {
21 { .min = 745000000, .max = 800000000 },
22 { .min = 695000000, .max = 750000000 },
23 { .min = 645000000, .max = 700000000 },
24 { .min = 595000000, .max = 650000000 },
25 { .min = 545000000, .max = 600000000 },
26 { .min = 495000000, .max = 555000000 },
27 { .min = 445000000, .max = 500000000 },
28 { .min = 400000000, .max = 450000000 },
29};
30
31static const struct clk_pll_characteristics plla_characteristics = {
32 .input = { .min = 2000000, .max = 32000000 },
33 .num_output = ARRAY_SIZE(plla_outputs),
34 .output = plla_outputs,
35 .icpll = plla_icpll,
36 .out = plla_out,
37};
38
39static const struct {
40 char *n;
41 char *p;
42 u8 id;
43} at91sam9x5_systemck[] = {
44 { .n = "ddrck", .p = "masterck", .id = 2 },
45 { .n = "smdck", .p = "smdclk", .id = 4 },
46 { .n = "uhpck", .p = "usbck", .id = 6 },
47 { .n = "udpck", .p = "usbck", .id = 7 },
48 { .n = "pck0", .p = "prog0", .id = 8 },
49 { .n = "pck1", .p = "prog1", .id = 9 },
50};
51
52static const struct clk_pcr_layout at91sam9x5_pcr_layout = {
53 .offset = 0x10c,
54 .cmd = BIT(12),
55 .pid_mask = GENMASK(5, 0),
56 .div_mask = GENMASK(17, 16),
57};
58
59struct pck {
60 char *n;
61 u8 id;
62};
63
64static const struct pck at91sam9x5_periphck[] = {
65 { .n = "pioAB_clk", .id = 2, },
66 { .n = "pioCD_clk", .id = 3, },
67 { .n = "smd_clk", .id = 4, },
68 { .n = "usart0_clk", .id = 5, },
69 { .n = "usart1_clk", .id = 6, },
70 { .n = "usart2_clk", .id = 7, },
71 { .n = "twi0_clk", .id = 9, },
72 { .n = "twi1_clk", .id = 10, },
73 { .n = "twi2_clk", .id = 11, },
74 { .n = "mci0_clk", .id = 12, },
75 { .n = "spi0_clk", .id = 13, },
76 { .n = "spi1_clk", .id = 14, },
77 { .n = "uart0_clk", .id = 15, },
78 { .n = "uart1_clk", .id = 16, },
79 { .n = "tcb0_clk", .id = 17, },
80 { .n = "pwm_clk", .id = 18, },
81 { .n = "adc_clk", .id = 19, },
82 { .n = "dma0_clk", .id = 20, },
83 { .n = "dma1_clk", .id = 21, },
84 { .n = "uhphs_clk", .id = 22, },
85 { .n = "udphs_clk", .id = 23, },
86 { .n = "mci1_clk", .id = 26, },
87 { .n = "ssc0_clk", .id = 28, },
88};
89
90static const struct pck at91sam9g15_periphck[] = {
91 { .n = "lcdc_clk", .id = 25, },
92 { }
93};
94
95static const struct pck at91sam9g25_periphck[] = {
96 { .n = "usart3_clk", .id = 8, },
97 { .n = "macb0_clk", .id = 24, },
98 { .n = "isi_clk", .id = 25, },
99 { }
100};
101
102static const struct pck at91sam9g35_periphck[] = {
103 { .n = "macb0_clk", .id = 24, },
104 { .n = "lcdc_clk", .id = 25, },
105 { }
106};
107
108static const struct pck at91sam9x25_periphck[] = {
109 { .n = "usart3_clk", .id = 8, },
110 { .n = "macb0_clk", .id = 24, },
111 { .n = "macb1_clk", .id = 27, },
112 { .n = "can0_clk", .id = 29, },
113 { .n = "can1_clk", .id = 30, },
114 { }
115};
116
117static const struct pck at91sam9x35_periphck[] = {
118 { .n = "macb0_clk", .id = 24, },
119 { .n = "lcdc_clk", .id = 25, },
120 { .n = "can0_clk", .id = 29, },
121 { .n = "can1_clk", .id = 30, },
122 { }
123};
124
125static void __init at91sam9x5_pmc_setup(struct device_node *np,
126 const struct pck *extra_pcks,
127 bool has_lcdck)
128{
129 struct clk_range range = CLK_RANGE(0, 0);
130 const char *slck_name, *mainxtal_name;
131 struct pmc_data *at91sam9x5_pmc;
132 const char *parent_names[6];
133 struct regmap *regmap;
134 struct clk_hw *hw;
135 int i;
136 bool bypass;
137
138 i = of_property_match_string(np, "clock-names", "slow_clk");
139 if (i < 0)
140 return;
141
142 slck_name = of_clk_get_parent_name(np, i);
143
144 i = of_property_match_string(np, "clock-names", "main_xtal");
145 if (i < 0)
146 return;
147 mainxtal_name = of_clk_get_parent_name(np, i);
148
149 regmap = syscon_node_to_regmap(np);
150 if (IS_ERR(regmap))
151 return;
152
153 at91sam9x5_pmc = pmc_data_allocate(PMC_MAIN + 1,
154 nck(at91sam9x5_systemck), 31, 0);
155 if (!at91sam9x5_pmc)
156 return;
157
158 hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000,
159 50000000);
160 if (IS_ERR(hw))
161 goto err_free;
162
163 bypass = of_property_read_bool(np, "atmel,osc-bypass");
164
165 hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
166 bypass);
167 if (IS_ERR(hw))
168 goto err_free;
169
170 parent_names[0] = "main_rc_osc";
171 parent_names[1] = "main_osc";
172 hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
173 if (IS_ERR(hw))
174 goto err_free;
175
176 at91sam9x5_pmc->chws[PMC_MAIN] = hw;
177
178 hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
179 &at91rm9200_pll_layout, &plla_characteristics);
180 if (IS_ERR(hw))
181 goto err_free;
182
183 hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack");
184 if (IS_ERR(hw))
185 goto err_free;
186
187 hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
188 if (IS_ERR(hw))
189 goto err_free;
190
191 at91sam9x5_pmc->chws[PMC_UTMI] = hw;
192
193 parent_names[0] = slck_name;
194 parent_names[1] = "mainck";
195 parent_names[2] = "plladivck";
196 parent_names[3] = "utmick";
197 hw = at91_clk_register_master(regmap, "masterck", 4, parent_names,
198 &at91sam9x5_master_layout,
199 &mck_characteristics);
200 if (IS_ERR(hw))
201 goto err_free;
202
203 at91sam9x5_pmc->chws[PMC_MCK] = hw;
204
205 parent_names[0] = "plladivck";
206 parent_names[1] = "utmick";
207 hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2);
208 if (IS_ERR(hw))
209 goto err_free;
210
211 hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2);
212 if (IS_ERR(hw))
213 goto err_free;
214
215 parent_names[0] = slck_name;
216 parent_names[1] = "mainck";
217 parent_names[2] = "plladivck";
218 parent_names[3] = "utmick";
219 parent_names[4] = "masterck";
220 for (i = 0; i < 2; i++) {
221 char name[6];
222
223 snprintf(name, sizeof(name), "prog%d", i);
224
225 hw = at91_clk_register_programmable(regmap, name,
226 parent_names, 5, i,
227 &at91sam9x5_programmable_layout);
228 if (IS_ERR(hw))
229 goto err_free;
230 }
231
232 for (i = 0; i < ARRAY_SIZE(at91sam9x5_systemck); i++) {
233 hw = at91_clk_register_system(regmap, at91sam9x5_systemck[i].n,
234 at91sam9x5_systemck[i].p,
235 at91sam9x5_systemck[i].id);
236 if (IS_ERR(hw))
237 goto err_free;
238
239 at91sam9x5_pmc->shws[at91sam9x5_systemck[i].id] = hw;
240 }
241
242 if (has_lcdck) {
243 hw = at91_clk_register_system(regmap, "lcdck", "masterck", 3);
244 if (IS_ERR(hw))
245 goto err_free;
246
247 at91sam9x5_pmc->shws[3] = hw;
248 }
249
250 for (i = 0; i < ARRAY_SIZE(at91sam9x5_periphck); i++) {
251 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
252 &at91sam9x5_pcr_layout,
253 at91sam9x5_periphck[i].n,
254 "masterck",
255 at91sam9x5_periphck[i].id,
256 &range);
257 if (IS_ERR(hw))
258 goto err_free;
259
260 at91sam9x5_pmc->phws[at91sam9x5_periphck[i].id] = hw;
261 }
262
263 for (i = 0; extra_pcks[i].id; i++) {
264 hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
265 &at91sam9x5_pcr_layout,
266 extra_pcks[i].n,
267 "masterck",
268 extra_pcks[i].id,
269 &range);
270 if (IS_ERR(hw))
271 goto err_free;
272
273 at91sam9x5_pmc->phws[extra_pcks[i].id] = hw;
274 }
275
276 of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9x5_pmc);
277
278 return;
279
280err_free:
281 pmc_data_free(at91sam9x5_pmc);
282}
283
284static void __init at91sam9g15_pmc_setup(struct device_node *np)
285{
286 at91sam9x5_pmc_setup(np, at91sam9g15_periphck, true);
287}
288CLK_OF_DECLARE_DRIVER(at91sam9g15_pmc, "atmel,at91sam9g15-pmc",
289 at91sam9g15_pmc_setup);
290
291static void __init at91sam9g25_pmc_setup(struct device_node *np)
292{
293 at91sam9x5_pmc_setup(np, at91sam9g25_periphck, false);
294}
295CLK_OF_DECLARE_DRIVER(at91sam9g25_pmc, "atmel,at91sam9g25-pmc",
296 at91sam9g25_pmc_setup);
297
298static void __init at91sam9g35_pmc_setup(struct device_node *np)
299{
300 at91sam9x5_pmc_setup(np, at91sam9g35_periphck, true);
301}
302CLK_OF_DECLARE_DRIVER(at91sam9g35_pmc, "atmel,at91sam9g35-pmc",
303 at91sam9g35_pmc_setup);
304
305static void __init at91sam9x25_pmc_setup(struct device_node *np)
306{
307 at91sam9x5_pmc_setup(np, at91sam9x25_periphck, false);
308}
309CLK_OF_DECLARE_DRIVER(at91sam9x25_pmc, "atmel,at91sam9x25-pmc",
310 at91sam9x25_pmc_setup);
311
312static void __init at91sam9x35_pmc_setup(struct device_node *np)
313{
314 at91sam9x5_pmc_setup(np, at91sam9x35_periphck, true);
315}
316CLK_OF_DECLARE_DRIVER(at91sam9x35_pmc, "atmel,at91sam9x35-pmc",
317 at91sam9x35_pmc_setup);
318
