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 DEFINE_SPINLOCK(mck_lock);
11
12static const struct clk_master_characteristics mck_characteristics = {
13 .output = { .min = 124000000, .max = 166000000 },
14 .divisors = { 1, 2, 4, 3 },
15};
16
17static u8 plla_out[] = { 0 };
18
19static u16 plla_icpll[] = { 0 };
20
21static const struct clk_range plla_outputs[] = {
22 { .min = 600000000, .max = 1200000000 },
23};
24
25static const struct clk_pll_characteristics plla_characteristics = {
26 .input = { .min = 12000000, .max = 24000000 },
27 .num_output = ARRAY_SIZE(plla_outputs),
28 .output = plla_outputs,
29 .icpll = plla_icpll,
30 .out = plla_out,
31};
32
33static const struct clk_pcr_layout sama5d2_pcr_layout = {
34 .offset = 0x10c,
35 .cmd = BIT(12),
36 .gckcss_mask = GENMASK(10, 8),
37 .pid_mask = GENMASK(6, 0),
38};
39
40static const struct {
41 char *n;
42 char *p;
43 unsigned long flags;
44 u8 id;
45} sama5d2_systemck[] = {
46 /*
47 * ddrck feeds DDR controller and is enabled by bootloader thus we need
48 * to keep it enabled in case there is no Linux consumer for it.
49 */
50 { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL },
51 { .n = "lcdck", .p = "masterck_div", .id = 3 },
52 { .n = "uhpck", .p = "usbck", .id = 6 },
53 { .n = "udpck", .p = "usbck", .id = 7 },
54 { .n = "pck0", .p = "prog0", .id = 8 },
55 { .n = "pck1", .p = "prog1", .id = 9 },
56 { .n = "pck2", .p = "prog2", .id = 10 },
57 { .n = "iscck", .p = "masterck_div", .id = 18 },
58};
59
60static const struct {
61 char *n;
62 u8 id;
63 struct clk_range r;
64} sama5d2_periph32ck[] = {
65 { .n = "macb0_clk", .id = 5, .r = { .min = 0, .max = 83000000 }, },
66 { .n = "tdes_clk", .id = 11, .r = { .min = 0, .max = 83000000 }, },
67 { .n = "matrix1_clk", .id = 14, },
68 { .n = "hsmc_clk", .id = 17, },
69 { .n = "pioA_clk", .id = 18, .r = { .min = 0, .max = 83000000 }, },
70 { .n = "flx0_clk", .id = 19, .r = { .min = 0, .max = 83000000 }, },
71 { .n = "flx1_clk", .id = 20, .r = { .min = 0, .max = 83000000 }, },
72 { .n = "flx2_clk", .id = 21, .r = { .min = 0, .max = 83000000 }, },
73 { .n = "flx3_clk", .id = 22, .r = { .min = 0, .max = 83000000 }, },
74 { .n = "flx4_clk", .id = 23, .r = { .min = 0, .max = 83000000 }, },
75 { .n = "uart0_clk", .id = 24, .r = { .min = 0, .max = 83000000 }, },
76 { .n = "uart1_clk", .id = 25, .r = { .min = 0, .max = 83000000 }, },
77 { .n = "uart2_clk", .id = 26, .r = { .min = 0, .max = 83000000 }, },
78 { .n = "uart3_clk", .id = 27, .r = { .min = 0, .max = 83000000 }, },
79 { .n = "uart4_clk", .id = 28, .r = { .min = 0, .max = 83000000 }, },
80 { .n = "twi0_clk", .id = 29, .r = { .min = 0, .max = 83000000 }, },
81 { .n = "twi1_clk", .id = 30, .r = { .min = 0, .max = 83000000 }, },
82 { .n = "spi0_clk", .id = 33, .r = { .min = 0, .max = 83000000 }, },
83 { .n = "spi1_clk", .id = 34, .r = { .min = 0, .max = 83000000 }, },
84 { .n = "tcb0_clk", .id = 35, .r = { .min = 0, .max = 83000000 }, },
85 { .n = "tcb1_clk", .id = 36, .r = { .min = 0, .max = 83000000 }, },
86 { .n = "pwm_clk", .id = 38, .r = { .min = 0, .max = 83000000 }, },
87 { .n = "adc_clk", .id = 40, .r = { .min = 0, .max = 83000000 }, },
88 { .n = "uhphs_clk", .id = 41, .r = { .min = 0, .max = 83000000 }, },
89 { .n = "udphs_clk", .id = 42, .r = { .min = 0, .max = 83000000 }, },
90 { .n = "ssc0_clk", .id = 43, .r = { .min = 0, .max = 83000000 }, },
91 { .n = "ssc1_clk", .id = 44, .r = { .min = 0, .max = 83000000 }, },
92 { .n = "trng_clk", .id = 47, .r = { .min = 0, .max = 83000000 }, },
93 { .n = "pdmic_clk", .id = 48, .r = { .min = 0, .max = 83000000 }, },
94 { .n = "securam_clk", .id = 51, },
95 { .n = "i2s0_clk", .id = 54, .r = { .min = 0, .max = 83000000 }, },
96 { .n = "i2s1_clk", .id = 55, .r = { .min = 0, .max = 83000000 }, },
97 { .n = "can0_clk", .id = 56, .r = { .min = 0, .max = 83000000 }, },
98 { .n = "can1_clk", .id = 57, .r = { .min = 0, .max = 83000000 }, },
99 { .n = "ptc_clk", .id = 58, .r = { .min = 0, .max = 83000000 }, },
100 { .n = "classd_clk", .id = 59, .r = { .min = 0, .max = 83000000 }, },
101};
102
103static const struct {
104 char *n;
105 unsigned long flags;
106 u8 id;
107} sama5d2_periphck[] = {
108 { .n = "dma0_clk", .id = 6, },
109 { .n = "dma1_clk", .id = 7, },
110 { .n = "aes_clk", .id = 9, },
111 { .n = "aesb_clk", .id = 10, },
112 { .n = "sha_clk", .id = 12, },
113 /*
114 * mpddr_clk feeds DDR controller and is enabled by bootloader thus we
115 * need to keep it enabled in case there is no Linux consumer for it.
116 */
117 { .n = "mpddr_clk", .id = 13, .flags = CLK_IS_CRITICAL },
118 { .n = "matrix0_clk", .id = 15, },
119 { .n = "sdmmc0_hclk", .id = 31, },
120 { .n = "sdmmc1_hclk", .id = 32, },
121 { .n = "lcdc_clk", .id = 45, },
122 { .n = "isc_clk", .id = 46, },
123 { .n = "qspi0_clk", .id = 52, },
124 { .n = "qspi1_clk", .id = 53, },
125};
126
127static const struct {
128 char *n;
129 u8 id;
130 struct clk_range r;
131 int chg_pid;
132} sama5d2_gck[] = {
133 { .n = "flx0_gclk", .id = 19, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
134 { .n = "flx1_gclk", .id = 20, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
135 { .n = "flx2_gclk", .id = 21, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
136 { .n = "flx3_gclk", .id = 22, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
137 { .n = "flx4_gclk", .id = 23, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
138 { .n = "uart0_gclk", .id = 24, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
139 { .n = "uart1_gclk", .id = 25, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
140 { .n = "uart2_gclk", .id = 26, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
141 { .n = "uart3_gclk", .id = 27, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
142 { .n = "uart4_gclk", .id = 28, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, },
143 { .n = "sdmmc0_gclk", .id = 31, .chg_pid = INT_MIN, },
144 { .n = "sdmmc1_gclk", .id = 32, .chg_pid = INT_MIN, },
145 { .n = "tcb0_gclk", .id = 35, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, },
146 { .n = "tcb1_gclk", .id = 36, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, },
147 { .n = "pwm_gclk", .id = 38, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, },
148 { .n = "isc_gclk", .id = 46, .chg_pid = INT_MIN, },
149 { .n = "pdmic_gclk", .id = 48, .chg_pid = INT_MIN, },
150 { .n = "i2s0_gclk", .id = 54, .chg_pid = 5, },
151 { .n = "i2s1_gclk", .id = 55, .chg_pid = 5, },
152 { .n = "can0_gclk", .id = 56, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, },
153 { .n = "can1_gclk", .id = 57, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, },
154 { .n = "classd_gclk", .id = 59, .chg_pid = 5, .r = { .min = 0, .max = 100000000 }, },
155};
156
157static const struct clk_programmable_layout sama5d2_programmable_layout = {
158 .pres_mask = 0xff,
159 .pres_shift = 4,
160 .css_mask = 0x7,
161 .have_slck_mck = 0,
162 .is_pres_direct = 1,
163};
164
165static void __init sama5d2_pmc_setup(struct device_node *np)
166{
167 struct clk_range range = CLK_RANGE(0, 0);
168 const char *slck_name, *mainxtal_name;
169 struct pmc_data *sama5d2_pmc;
170 const char *parent_names[6];
171 struct regmap *regmap, *regmap_sfr;
172 struct clk_hw *hw;
173 int i;
174 bool bypass;
175
176 i = of_property_match_string(np, propname: "clock-names", string: "slow_clk");
177 if (i < 0)
178 return;
179
180 slck_name = of_clk_get_parent_name(np, index: i);
181
182 i = of_property_match_string(np, propname: "clock-names", string: "main_xtal");
183 if (i < 0)
184 return;
185 mainxtal_name = of_clk_get_parent_name(np, index: i);
186
187 regmap = device_node_to_regmap(np);
188 if (IS_ERR(ptr: regmap))
189 return;
190
191 sama5d2_pmc = pmc_data_allocate(PMC_AUDIOPINCK + 1,
192 nck(sama5d2_systemck),
193 nck(sama5d2_periph32ck),
194 nck(sama5d2_gck), npck: 3);
195 if (!sama5d2_pmc)
196 return;
197
198 hw = at91_clk_register_main_rc_osc(regmap, name: "main_rc_osc", frequency: 12000000,
199 accuracy: 100000000);
200 if (IS_ERR(ptr: hw))
201 goto err_free;
202
203 bypass = of_property_read_bool(np, propname: "atmel,osc-bypass");
204
205 hw = at91_clk_register_main_osc(regmap, name: "main_osc", parent_name: mainxtal_name, NULL,
206 bypass);
207 if (IS_ERR(ptr: hw))
208 goto err_free;
209
210 parent_names[0] = "main_rc_osc";
211 parent_names[1] = "main_osc";
212 hw = at91_clk_register_sam9x5_main(regmap, name: "mainck", parent_names, NULL, num_parents: 2);
213 if (IS_ERR(ptr: hw))
214 goto err_free;
215
216 sama5d2_pmc->chws[PMC_MAIN] = hw;
217
218 hw = at91_clk_register_pll(regmap, name: "pllack", parent_name: "mainck", id: 0,
219 layout: &sama5d3_pll_layout, characteristics: &plla_characteristics);
220 if (IS_ERR(ptr: hw))
221 goto err_free;
222
223 hw = at91_clk_register_plldiv(regmap, name: "plladivck", parent_name: "pllack");
224 if (IS_ERR(ptr: hw))
225 goto err_free;
226
227 sama5d2_pmc->chws[PMC_PLLACK] = hw;
228
229 hw = at91_clk_register_audio_pll_frac(regmap, name: "audiopll_fracck",
230 parent_name: "mainck");
231 if (IS_ERR(ptr: hw))
232 goto err_free;
233
234 hw = at91_clk_register_audio_pll_pad(regmap, name: "audiopll_padck",
235 parent_name: "audiopll_fracck");
236 if (IS_ERR(ptr: hw))
237 goto err_free;
238
239 sama5d2_pmc->chws[PMC_AUDIOPINCK] = hw;
240
241 hw = at91_clk_register_audio_pll_pmc(regmap, name: "audiopll_pmcck",
242 parent_name: "audiopll_fracck");
243 if (IS_ERR(ptr: hw))
244 goto err_free;
245
246 sama5d2_pmc->chws[PMC_AUDIOPLLCK] = hw;
247
248 regmap_sfr = syscon_regmap_lookup_by_compatible(s: "atmel,sama5d2-sfr");
249 if (IS_ERR(ptr: regmap_sfr))
250 regmap_sfr = NULL;
251
252 hw = at91_clk_register_utmi(regmap_pmc: regmap, regmap_sfr, name: "utmick", parent_name: "mainck", NULL);
253 if (IS_ERR(ptr: hw))
254 goto err_free;
255
256 sama5d2_pmc->chws[PMC_UTMI] = hw;
257
258 parent_names[0] = slck_name;
259 parent_names[1] = "mainck";
260 parent_names[2] = "plladivck";
261 parent_names[3] = "utmick";
262 hw = at91_clk_register_master_pres(regmap, name: "masterck_pres", num_parents: 4,
263 parent_names, NULL,
264 layout: &at91sam9x5_master_layout,
265 characteristics: &mck_characteristics, lock: &mck_lock);
266 if (IS_ERR(ptr: hw))
267 goto err_free;
268
269 hw = at91_clk_register_master_div(regmap, name: "masterck_div",
270 parent_names: "masterck_pres", NULL,
271 layout: &at91sam9x5_master_layout,
272 characteristics: &mck_characteristics, lock: &mck_lock,
273 CLK_SET_RATE_GATE, safe_div: 0);
274 if (IS_ERR(ptr: hw))
275 goto err_free;
276
277 sama5d2_pmc->chws[PMC_MCK] = hw;
278
279 hw = at91_clk_register_h32mx(regmap, name: "h32mxck", parent_name: "masterck_div");
280 if (IS_ERR(ptr: hw))
281 goto err_free;
282
283 sama5d2_pmc->chws[PMC_MCK2] = hw;
284
285 parent_names[0] = "plladivck";
286 parent_names[1] = "utmick";
287 hw = at91sam9x5_clk_register_usb(regmap, name: "usbck", parent_names, num_parents: 2);
288 if (IS_ERR(ptr: hw))
289 goto err_free;
290
291 parent_names[0] = slck_name;
292 parent_names[1] = "mainck";
293 parent_names[2] = "plladivck";
294 parent_names[3] = "utmick";
295 parent_names[4] = "masterck_div";
296 parent_names[5] = "audiopll_pmcck";
297 for (i = 0; i < 3; i++) {
298 char name[6];
299
300 snprintf(buf: name, size: sizeof(name), fmt: "prog%d", i);
301
302 hw = at91_clk_register_programmable(regmap, name,
303 parent_names, NULL, num_parents: 6, id: i,
304 layout: &sama5d2_programmable_layout,
305 NULL);
306 if (IS_ERR(ptr: hw))
307 goto err_free;
308
309 sama5d2_pmc->pchws[i] = hw;
310 }
311
312 for (i = 0; i < ARRAY_SIZE(sama5d2_systemck); i++) {
313 hw = at91_clk_register_system(regmap, name: sama5d2_systemck[i].n,
314 parent_name: sama5d2_systemck[i].p, NULL,
315 id: sama5d2_systemck[i].id,
316 flags: sama5d2_systemck[i].flags);
317 if (IS_ERR(ptr: hw))
318 goto err_free;
319
320 sama5d2_pmc->shws[sama5d2_systemck[i].id] = hw;
321 }
322
323 for (i = 0; i < ARRAY_SIZE(sama5d2_periphck); i++) {
324 hw = at91_clk_register_sam9x5_peripheral(regmap, lock: &pmc_pcr_lock,
325 layout: &sama5d2_pcr_layout,
326 name: sama5d2_periphck[i].n,
327 parent_name: "masterck_div", NULL,
328 id: sama5d2_periphck[i].id,
329 range: &range, INT_MIN,
330 flags: sama5d2_periphck[i].flags);
331 if (IS_ERR(ptr: hw))
332 goto err_free;
333
334 sama5d2_pmc->phws[sama5d2_periphck[i].id] = hw;
335 }
336
337 for (i = 0; i < ARRAY_SIZE(sama5d2_periph32ck); i++) {
338 hw = at91_clk_register_sam9x5_peripheral(regmap, lock: &pmc_pcr_lock,
339 layout: &sama5d2_pcr_layout,
340 name: sama5d2_periph32ck[i].n,
341 parent_name: "h32mxck", NULL,
342 id: sama5d2_periph32ck[i].id,
343 range: &sama5d2_periph32ck[i].r,
344 INT_MIN, flags: 0);
345 if (IS_ERR(ptr: hw))
346 goto err_free;
347
348 sama5d2_pmc->phws[sama5d2_periph32ck[i].id] = hw;
349 }
350
351 parent_names[0] = slck_name;
352 parent_names[1] = "mainck";
353 parent_names[2] = "plladivck";
354 parent_names[3] = "utmick";
355 parent_names[4] = "masterck_div";
356 parent_names[5] = "audiopll_pmcck";
357 for (i = 0; i < ARRAY_SIZE(sama5d2_gck); i++) {
358 hw = at91_clk_register_generated(regmap, lock: &pmc_pcr_lock,
359 layout: &sama5d2_pcr_layout,
360 name: sama5d2_gck[i].n,
361 parent_names, NULL, NULL, num_parents: 6,
362 id: sama5d2_gck[i].id,
363 range: &sama5d2_gck[i].r,
364 chg_pid: sama5d2_gck[i].chg_pid);
365 if (IS_ERR(ptr: hw))
366 goto err_free;
367
368 sama5d2_pmc->ghws[sama5d2_gck[i].id] = hw;
369 }
370
371 if (regmap_sfr) {
372 parent_names[0] = "i2s0_clk";
373 parent_names[1] = "i2s0_gclk";
374 hw = at91_clk_i2s_mux_register(regmap: regmap_sfr, name: "i2s0_muxclk",
375 parent_names, num_parents: 2, bus_id: 0);
376 if (IS_ERR(ptr: hw))
377 goto err_free;
378
379 sama5d2_pmc->chws[PMC_I2S0_MUX] = hw;
380
381 parent_names[0] = "i2s1_clk";
382 parent_names[1] = "i2s1_gclk";
383 hw = at91_clk_i2s_mux_register(regmap: regmap_sfr, name: "i2s1_muxclk",
384 parent_names, num_parents: 2, bus_id: 1);
385 if (IS_ERR(ptr: hw))
386 goto err_free;
387
388 sama5d2_pmc->chws[PMC_I2S1_MUX] = hw;
389 }
390
391 of_clk_add_hw_provider(np, get: of_clk_hw_pmc_get, data: sama5d2_pmc);
392
393 return;
394
395err_free:
396 kfree(objp: sama5d2_pmc);
397}
398
399CLK_OF_DECLARE(sama5d2_pmc, "atmel,sama5d2-pmc", sama5d2_pmc_setup);
400

source code of linux/drivers/clk/at91/sama5d2.c