]>
Commit | Line | Data |
---|---|---|
9abd5f05 SH |
1 | /* |
2 | * clk-si5351.c: Silicon Laboratories Si5351A/B/C I2C Clock Generator | |
3 | * | |
4 | * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | |
5 | * Rabeeh Khoury <rabeeh@solid-run.com> | |
6 | * | |
7 | * References: | |
8 | * [1] "Si5351A/B/C Data Sheet" | |
9 | * http://www.silabs.com/Support%20Documents/TechnicalDocs/Si5351.pdf | |
10 | * [2] "Manually Generating an Si5351 Register Map" | |
11 | * http://www.silabs.com/Support%20Documents/TechnicalDocs/AN619.pdf | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify it | |
14 | * under the terms of the GNU General Public License as published by the | |
15 | * Free Software Foundation; either version 2 of the License, or (at your | |
16 | * option) any later version. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
608f9b6e | 21 | #include <linux/clk.h> |
9abd5f05 SH |
22 | #include <linux/clk-provider.h> |
23 | #include <linux/delay.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/rational.h> | |
27 | #include <linux/i2c.h> | |
28 | #include <linux/of_platform.h> | |
29 | #include <linux/platform_data/si5351.h> | |
30 | #include <linux/regmap.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/string.h> | |
33 | #include <asm/div64.h> | |
34 | ||
35 | #include "clk-si5351.h" | |
36 | ||
37 | struct si5351_driver_data; | |
38 | ||
39 | struct si5351_parameters { | |
40 | unsigned long p1; | |
41 | unsigned long p2; | |
42 | unsigned long p3; | |
43 | int valid; | |
44 | }; | |
45 | ||
46 | struct si5351_hw_data { | |
47 | struct clk_hw hw; | |
48 | struct si5351_driver_data *drvdata; | |
49 | struct si5351_parameters params; | |
50 | unsigned char num; | |
51 | }; | |
52 | ||
53 | struct si5351_driver_data { | |
54 | enum si5351_variant variant; | |
55 | struct i2c_client *client; | |
56 | struct regmap *regmap; | |
57 | struct clk_onecell_data onecell; | |
58 | ||
59 | struct clk *pxtal; | |
60 | const char *pxtal_name; | |
61 | struct clk_hw xtal; | |
62 | struct clk *pclkin; | |
63 | const char *pclkin_name; | |
64 | struct clk_hw clkin; | |
65 | ||
66 | struct si5351_hw_data pll[2]; | |
67 | struct si5351_hw_data *msynth; | |
68 | struct si5351_hw_data *clkout; | |
69 | }; | |
70 | ||
8234caed | 71 | static const char * const si5351_input_names[] = { |
9abd5f05 SH |
72 | "xtal", "clkin" |
73 | }; | |
8234caed | 74 | static const char * const si5351_pll_names[] = { |
9abd5f05 SH |
75 | "plla", "pllb", "vxco" |
76 | }; | |
8234caed | 77 | static const char * const si5351_msynth_names[] = { |
9abd5f05 SH |
78 | "ms0", "ms1", "ms2", "ms3", "ms4", "ms5", "ms6", "ms7" |
79 | }; | |
8234caed | 80 | static const char * const si5351_clkout_names[] = { |
9abd5f05 SH |
81 | "clk0", "clk1", "clk2", "clk3", "clk4", "clk5", "clk6", "clk7" |
82 | }; | |
83 | ||
84 | /* | |
85 | * Si5351 i2c regmap | |
86 | */ | |
87 | static inline u8 si5351_reg_read(struct si5351_driver_data *drvdata, u8 reg) | |
88 | { | |
89 | u32 val; | |
90 | int ret; | |
91 | ||
92 | ret = regmap_read(drvdata->regmap, reg, &val); | |
93 | if (ret) { | |
94 | dev_err(&drvdata->client->dev, | |
95 | "unable to read from reg%02x\n", reg); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | return (u8)val; | |
100 | } | |
101 | ||
102 | static inline int si5351_bulk_read(struct si5351_driver_data *drvdata, | |
103 | u8 reg, u8 count, u8 *buf) | |
104 | { | |
105 | return regmap_bulk_read(drvdata->regmap, reg, buf, count); | |
106 | } | |
107 | ||
108 | static inline int si5351_reg_write(struct si5351_driver_data *drvdata, | |
109 | u8 reg, u8 val) | |
110 | { | |
111 | return regmap_write(drvdata->regmap, reg, val); | |
112 | } | |
113 | ||
114 | static inline int si5351_bulk_write(struct si5351_driver_data *drvdata, | |
115 | u8 reg, u8 count, const u8 *buf) | |
116 | { | |
117 | return regmap_raw_write(drvdata->regmap, reg, buf, count); | |
118 | } | |
119 | ||
120 | static inline int si5351_set_bits(struct si5351_driver_data *drvdata, | |
121 | u8 reg, u8 mask, u8 val) | |
122 | { | |
123 | return regmap_update_bits(drvdata->regmap, reg, mask, val); | |
124 | } | |
125 | ||
126 | static inline u8 si5351_msynth_params_address(int num) | |
127 | { | |
128 | if (num > 5) | |
129 | return SI5351_CLK6_PARAMETERS + (num - 6); | |
130 | return SI5351_CLK0_PARAMETERS + (SI5351_PARAMETERS_LENGTH * num); | |
131 | } | |
132 | ||
133 | static void si5351_read_parameters(struct si5351_driver_data *drvdata, | |
134 | u8 reg, struct si5351_parameters *params) | |
135 | { | |
136 | u8 buf[SI5351_PARAMETERS_LENGTH]; | |
137 | ||
138 | switch (reg) { | |
139 | case SI5351_CLK6_PARAMETERS: | |
140 | case SI5351_CLK7_PARAMETERS: | |
141 | buf[0] = si5351_reg_read(drvdata, reg); | |
142 | params->p1 = buf[0]; | |
143 | params->p2 = 0; | |
144 | params->p3 = 1; | |
145 | break; | |
146 | default: | |
147 | si5351_bulk_read(drvdata, reg, SI5351_PARAMETERS_LENGTH, buf); | |
148 | params->p1 = ((buf[2] & 0x03) << 16) | (buf[3] << 8) | buf[4]; | |
149 | params->p2 = ((buf[5] & 0x0f) << 16) | (buf[6] << 8) | buf[7]; | |
150 | params->p3 = ((buf[5] & 0xf0) << 12) | (buf[0] << 8) | buf[1]; | |
151 | } | |
152 | params->valid = 1; | |
153 | } | |
154 | ||
155 | static void si5351_write_parameters(struct si5351_driver_data *drvdata, | |
156 | u8 reg, struct si5351_parameters *params) | |
157 | { | |
158 | u8 buf[SI5351_PARAMETERS_LENGTH]; | |
159 | ||
160 | switch (reg) { | |
161 | case SI5351_CLK6_PARAMETERS: | |
162 | case SI5351_CLK7_PARAMETERS: | |
163 | buf[0] = params->p1 & 0xff; | |
164 | si5351_reg_write(drvdata, reg, buf[0]); | |
165 | break; | |
166 | default: | |
167 | buf[0] = ((params->p3 & 0x0ff00) >> 8) & 0xff; | |
168 | buf[1] = params->p3 & 0xff; | |
169 | /* save rdiv and divby4 */ | |
170 | buf[2] = si5351_reg_read(drvdata, reg + 2) & ~0x03; | |
171 | buf[2] |= ((params->p1 & 0x30000) >> 16) & 0x03; | |
172 | buf[3] = ((params->p1 & 0x0ff00) >> 8) & 0xff; | |
173 | buf[4] = params->p1 & 0xff; | |
174 | buf[5] = ((params->p3 & 0xf0000) >> 12) | | |
175 | ((params->p2 & 0xf0000) >> 16); | |
176 | buf[6] = ((params->p2 & 0x0ff00) >> 8) & 0xff; | |
177 | buf[7] = params->p2 & 0xff; | |
178 | si5351_bulk_write(drvdata, reg, SI5351_PARAMETERS_LENGTH, buf); | |
179 | } | |
180 | } | |
181 | ||
182 | static bool si5351_regmap_is_volatile(struct device *dev, unsigned int reg) | |
183 | { | |
184 | switch (reg) { | |
185 | case SI5351_DEVICE_STATUS: | |
186 | case SI5351_INTERRUPT_STATUS: | |
187 | case SI5351_PLL_RESET: | |
188 | return true; | |
189 | } | |
190 | return false; | |
191 | } | |
192 | ||
193 | static bool si5351_regmap_is_writeable(struct device *dev, unsigned int reg) | |
194 | { | |
195 | /* reserved registers */ | |
196 | if (reg >= 4 && reg <= 8) | |
197 | return false; | |
198 | if (reg >= 10 && reg <= 14) | |
199 | return false; | |
200 | if (reg >= 173 && reg <= 176) | |
201 | return false; | |
202 | if (reg >= 178 && reg <= 182) | |
203 | return false; | |
204 | /* read-only */ | |
205 | if (reg == SI5351_DEVICE_STATUS) | |
206 | return false; | |
207 | return true; | |
208 | } | |
209 | ||
8234caed | 210 | static const struct regmap_config si5351_regmap_config = { |
9abd5f05 SH |
211 | .reg_bits = 8, |
212 | .val_bits = 8, | |
213 | .cache_type = REGCACHE_RBTREE, | |
214 | .max_register = 187, | |
215 | .writeable_reg = si5351_regmap_is_writeable, | |
216 | .volatile_reg = si5351_regmap_is_volatile, | |
217 | }; | |
218 | ||
219 | /* | |
220 | * Si5351 xtal clock input | |
221 | */ | |
222 | static int si5351_xtal_prepare(struct clk_hw *hw) | |
223 | { | |
224 | struct si5351_driver_data *drvdata = | |
225 | container_of(hw, struct si5351_driver_data, xtal); | |
226 | si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, | |
227 | SI5351_XTAL_ENABLE, SI5351_XTAL_ENABLE); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static void si5351_xtal_unprepare(struct clk_hw *hw) | |
232 | { | |
233 | struct si5351_driver_data *drvdata = | |
234 | container_of(hw, struct si5351_driver_data, xtal); | |
235 | si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, | |
236 | SI5351_XTAL_ENABLE, 0); | |
237 | } | |
238 | ||
239 | static const struct clk_ops si5351_xtal_ops = { | |
240 | .prepare = si5351_xtal_prepare, | |
241 | .unprepare = si5351_xtal_unprepare, | |
242 | }; | |
243 | ||
244 | /* | |
245 | * Si5351 clkin clock input (Si5351C only) | |
246 | */ | |
247 | static int si5351_clkin_prepare(struct clk_hw *hw) | |
248 | { | |
249 | struct si5351_driver_data *drvdata = | |
250 | container_of(hw, struct si5351_driver_data, clkin); | |
251 | si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, | |
252 | SI5351_CLKIN_ENABLE, SI5351_CLKIN_ENABLE); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static void si5351_clkin_unprepare(struct clk_hw *hw) | |
257 | { | |
258 | struct si5351_driver_data *drvdata = | |
259 | container_of(hw, struct si5351_driver_data, clkin); | |
260 | si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, | |
261 | SI5351_CLKIN_ENABLE, 0); | |
262 | } | |
263 | ||
264 | /* | |
265 | * CMOS clock source constraints: | |
266 | * The input frequency range of the PLL is 10Mhz to 40MHz. | |
267 | * If CLKIN is >40MHz, the input divider must be used. | |
268 | */ | |
269 | static unsigned long si5351_clkin_recalc_rate(struct clk_hw *hw, | |
270 | unsigned long parent_rate) | |
271 | { | |
272 | struct si5351_driver_data *drvdata = | |
273 | container_of(hw, struct si5351_driver_data, clkin); | |
274 | unsigned long rate; | |
275 | unsigned char idiv; | |
276 | ||
277 | rate = parent_rate; | |
278 | if (parent_rate > 160000000) { | |
279 | idiv = SI5351_CLKIN_DIV_8; | |
280 | rate /= 8; | |
281 | } else if (parent_rate > 80000000) { | |
282 | idiv = SI5351_CLKIN_DIV_4; | |
283 | rate /= 4; | |
284 | } else if (parent_rate > 40000000) { | |
285 | idiv = SI5351_CLKIN_DIV_2; | |
286 | rate /= 2; | |
287 | } else { | |
288 | idiv = SI5351_CLKIN_DIV_1; | |
289 | } | |
290 | ||
291 | si5351_set_bits(drvdata, SI5351_PLL_INPUT_SOURCE, | |
292 | SI5351_CLKIN_DIV_MASK, idiv); | |
293 | ||
294 | dev_dbg(&drvdata->client->dev, "%s - clkin div = %d, rate = %lu\n", | |
295 | __func__, (1 << (idiv >> 6)), rate); | |
296 | ||
297 | return rate; | |
298 | } | |
299 | ||
300 | static const struct clk_ops si5351_clkin_ops = { | |
301 | .prepare = si5351_clkin_prepare, | |
302 | .unprepare = si5351_clkin_unprepare, | |
303 | .recalc_rate = si5351_clkin_recalc_rate, | |
304 | }; | |
305 | ||
306 | /* | |
307 | * Si5351 vxco clock input (Si5351B only) | |
308 | */ | |
309 | ||
310 | static int si5351_vxco_prepare(struct clk_hw *hw) | |
311 | { | |
312 | struct si5351_hw_data *hwdata = | |
313 | container_of(hw, struct si5351_hw_data, hw); | |
314 | ||
315 | dev_warn(&hwdata->drvdata->client->dev, "VXCO currently unsupported\n"); | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
320 | static void si5351_vxco_unprepare(struct clk_hw *hw) | |
321 | { | |
322 | } | |
323 | ||
324 | static unsigned long si5351_vxco_recalc_rate(struct clk_hw *hw, | |
325 | unsigned long parent_rate) | |
326 | { | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int si5351_vxco_set_rate(struct clk_hw *hw, unsigned long rate, | |
331 | unsigned long parent) | |
332 | { | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static const struct clk_ops si5351_vxco_ops = { | |
337 | .prepare = si5351_vxco_prepare, | |
338 | .unprepare = si5351_vxco_unprepare, | |
339 | .recalc_rate = si5351_vxco_recalc_rate, | |
340 | .set_rate = si5351_vxco_set_rate, | |
341 | }; | |
342 | ||
343 | /* | |
344 | * Si5351 pll a/b | |
345 | * | |
346 | * Feedback Multisynth Divider Equations [2] | |
347 | * | |
348 | * fVCO = fIN * (a + b/c) | |
349 | * | |
350 | * with 15 + 0/1048575 <= (a + b/c) <= 90 + 0/1048575 and | |
351 | * fIN = fXTAL or fIN = fCLKIN/CLKIN_DIV | |
352 | * | |
353 | * Feedback Multisynth Register Equations | |
354 | * | |
355 | * (1) MSNx_P1[17:0] = 128 * a + floor(128 * b/c) - 512 | |
356 | * (2) MSNx_P2[19:0] = 128 * b - c * floor(128 * b/c) = (128*b) mod c | |
357 | * (3) MSNx_P3[19:0] = c | |
358 | * | |
359 | * Transposing (2) yields: (4) floor(128 * b/c) = (128 * b / MSNx_P2)/c | |
360 | * | |
361 | * Using (4) on (1) yields: | |
362 | * MSNx_P1 = 128 * a + (128 * b/MSNx_P2)/c - 512 | |
363 | * MSNx_P1 + 512 + MSNx_P2/c = 128 * a + 128 * b/c | |
364 | * | |
365 | * a + b/c = (MSNx_P1 + MSNx_P2/MSNx_P3 + 512)/128 | |
366 | * = (MSNx_P1*MSNx_P3 + MSNx_P2 + 512*MSNx_P3)/(128*MSNx_P3) | |
367 | * | |
368 | */ | |
369 | static int _si5351_pll_reparent(struct si5351_driver_data *drvdata, | |
370 | int num, enum si5351_pll_src parent) | |
371 | { | |
372 | u8 mask = (num == 0) ? SI5351_PLLA_SOURCE : SI5351_PLLB_SOURCE; | |
373 | ||
374 | if (parent == SI5351_PLL_SRC_DEFAULT) | |
375 | return 0; | |
376 | ||
377 | if (num > 2) | |
378 | return -EINVAL; | |
379 | ||
380 | if (drvdata->variant != SI5351_VARIANT_C && | |
381 | parent != SI5351_PLL_SRC_XTAL) | |
382 | return -EINVAL; | |
383 | ||
384 | si5351_set_bits(drvdata, SI5351_PLL_INPUT_SOURCE, mask, | |
385 | (parent == SI5351_PLL_SRC_XTAL) ? 0 : mask); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | static unsigned char si5351_pll_get_parent(struct clk_hw *hw) | |
390 | { | |
391 | struct si5351_hw_data *hwdata = | |
392 | container_of(hw, struct si5351_hw_data, hw); | |
393 | u8 mask = (hwdata->num == 0) ? SI5351_PLLA_SOURCE : SI5351_PLLB_SOURCE; | |
394 | u8 val; | |
395 | ||
396 | val = si5351_reg_read(hwdata->drvdata, SI5351_PLL_INPUT_SOURCE); | |
397 | ||
398 | return (val & mask) ? 1 : 0; | |
399 | } | |
400 | ||
401 | static int si5351_pll_set_parent(struct clk_hw *hw, u8 index) | |
402 | { | |
403 | struct si5351_hw_data *hwdata = | |
404 | container_of(hw, struct si5351_hw_data, hw); | |
405 | ||
406 | if (hwdata->drvdata->variant != SI5351_VARIANT_C && | |
407 | index > 0) | |
408 | return -EPERM; | |
409 | ||
410 | if (index > 1) | |
411 | return -EINVAL; | |
412 | ||
413 | return _si5351_pll_reparent(hwdata->drvdata, hwdata->num, | |
414 | (index == 0) ? SI5351_PLL_SRC_XTAL : | |
415 | SI5351_PLL_SRC_CLKIN); | |
416 | } | |
417 | ||
418 | static unsigned long si5351_pll_recalc_rate(struct clk_hw *hw, | |
419 | unsigned long parent_rate) | |
420 | { | |
421 | struct si5351_hw_data *hwdata = | |
422 | container_of(hw, struct si5351_hw_data, hw); | |
423 | u8 reg = (hwdata->num == 0) ? SI5351_PLLA_PARAMETERS : | |
424 | SI5351_PLLB_PARAMETERS; | |
425 | unsigned long long rate; | |
426 | ||
427 | if (!hwdata->params.valid) | |
428 | si5351_read_parameters(hwdata->drvdata, reg, &hwdata->params); | |
429 | ||
430 | if (hwdata->params.p3 == 0) | |
431 | return parent_rate; | |
432 | ||
433 | /* fVCO = fIN * (P1*P3 + 512*P3 + P2)/(128*P3) */ | |
434 | rate = hwdata->params.p1 * hwdata->params.p3; | |
435 | rate += 512 * hwdata->params.p3; | |
436 | rate += hwdata->params.p2; | |
437 | rate *= parent_rate; | |
438 | do_div(rate, 128 * hwdata->params.p3); | |
439 | ||
440 | dev_dbg(&hwdata->drvdata->client->dev, | |
441 | "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 442 | __func__, clk_hw_get_name(hw), |
9abd5f05 SH |
443 | hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, |
444 | parent_rate, (unsigned long)rate); | |
445 | ||
446 | return (unsigned long)rate; | |
447 | } | |
448 | ||
449 | static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate, | |
450 | unsigned long *parent_rate) | |
451 | { | |
452 | struct si5351_hw_data *hwdata = | |
453 | container_of(hw, struct si5351_hw_data, hw); | |
454 | unsigned long rfrac, denom, a, b, c; | |
455 | unsigned long long lltmp; | |
456 | ||
457 | if (rate < SI5351_PLL_VCO_MIN) | |
458 | rate = SI5351_PLL_VCO_MIN; | |
459 | if (rate > SI5351_PLL_VCO_MAX) | |
460 | rate = SI5351_PLL_VCO_MAX; | |
461 | ||
462 | /* determine integer part of feedback equation */ | |
463 | a = rate / *parent_rate; | |
464 | ||
465 | if (a < SI5351_PLL_A_MIN) | |
466 | rate = *parent_rate * SI5351_PLL_A_MIN; | |
467 | if (a > SI5351_PLL_A_MAX) | |
468 | rate = *parent_rate * SI5351_PLL_A_MAX; | |
469 | ||
470 | /* find best approximation for b/c = fVCO mod fIN */ | |
471 | denom = 1000 * 1000; | |
472 | lltmp = rate % (*parent_rate); | |
473 | lltmp *= denom; | |
474 | do_div(lltmp, *parent_rate); | |
475 | rfrac = (unsigned long)lltmp; | |
476 | ||
477 | b = 0; | |
478 | c = 1; | |
479 | if (rfrac) | |
480 | rational_best_approximation(rfrac, denom, | |
481 | SI5351_PLL_B_MAX, SI5351_PLL_C_MAX, &b, &c); | |
482 | ||
483 | /* calculate parameters */ | |
484 | hwdata->params.p3 = c; | |
485 | hwdata->params.p2 = (128 * b) % c; | |
486 | hwdata->params.p1 = 128 * a; | |
487 | hwdata->params.p1 += (128 * b / c); | |
488 | hwdata->params.p1 -= 512; | |
489 | ||
490 | /* recalculate rate by fIN * (a + b/c) */ | |
491 | lltmp = *parent_rate; | |
492 | lltmp *= b; | |
493 | do_div(lltmp, c); | |
494 | ||
495 | rate = (unsigned long)lltmp; | |
496 | rate += *parent_rate * a; | |
497 | ||
498 | dev_dbg(&hwdata->drvdata->client->dev, | |
499 | "%s - %s: a = %lu, b = %lu, c = %lu, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 500 | __func__, clk_hw_get_name(hw), a, b, c, |
9abd5f05 SH |
501 | *parent_rate, rate); |
502 | ||
503 | return rate; | |
504 | } | |
505 | ||
506 | static int si5351_pll_set_rate(struct clk_hw *hw, unsigned long rate, | |
507 | unsigned long parent_rate) | |
508 | { | |
509 | struct si5351_hw_data *hwdata = | |
510 | container_of(hw, struct si5351_hw_data, hw); | |
511 | u8 reg = (hwdata->num == 0) ? SI5351_PLLA_PARAMETERS : | |
512 | SI5351_PLLB_PARAMETERS; | |
513 | ||
514 | /* write multisynth parameters */ | |
515 | si5351_write_parameters(hwdata->drvdata, reg, &hwdata->params); | |
516 | ||
517 | /* plla/pllb ctrl is in clk6/clk7 ctrl registers */ | |
518 | si5351_set_bits(hwdata->drvdata, SI5351_CLK6_CTRL + hwdata->num, | |
519 | SI5351_CLK_INTEGER_MODE, | |
520 | (hwdata->params.p2 == 0) ? SI5351_CLK_INTEGER_MODE : 0); | |
521 | ||
522 | dev_dbg(&hwdata->drvdata->client->dev, | |
523 | "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 524 | __func__, clk_hw_get_name(hw), |
9abd5f05 SH |
525 | hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, |
526 | parent_rate, rate); | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
531 | static const struct clk_ops si5351_pll_ops = { | |
532 | .set_parent = si5351_pll_set_parent, | |
533 | .get_parent = si5351_pll_get_parent, | |
534 | .recalc_rate = si5351_pll_recalc_rate, | |
535 | .round_rate = si5351_pll_round_rate, | |
536 | .set_rate = si5351_pll_set_rate, | |
537 | }; | |
538 | ||
539 | /* | |
540 | * Si5351 multisync divider | |
541 | * | |
542 | * for fOUT <= 150 MHz: | |
543 | * | |
544 | * fOUT = (fIN * (a + b/c)) / CLKOUTDIV | |
545 | * | |
546 | * with 6 + 0/1048575 <= (a + b/c) <= 1800 + 0/1048575 and | |
547 | * fIN = fVCO0, fVCO1 | |
548 | * | |
549 | * Output Clock Multisynth Register Equations | |
550 | * | |
551 | * MSx_P1[17:0] = 128 * a + floor(128 * b/c) - 512 | |
552 | * MSx_P2[19:0] = 128 * b - c * floor(128 * b/c) = (128*b) mod c | |
553 | * MSx_P3[19:0] = c | |
554 | * | |
2073b5e9 SS |
555 | * MS[6,7] are integer (P1) divide only, P1 = divide value, |
556 | * P2 and P3 are not applicable | |
9abd5f05 SH |
557 | * |
558 | * for 150MHz < fOUT <= 160MHz: | |
559 | * | |
560 | * MSx_P1 = 0, MSx_P2 = 0, MSx_P3 = 1, MSx_INT = 1, MSx_DIVBY4 = 11b | |
561 | */ | |
562 | static int _si5351_msynth_reparent(struct si5351_driver_data *drvdata, | |
563 | int num, enum si5351_multisynth_src parent) | |
564 | { | |
565 | if (parent == SI5351_MULTISYNTH_SRC_DEFAULT) | |
566 | return 0; | |
567 | ||
568 | if (num > 8) | |
569 | return -EINVAL; | |
570 | ||
571 | si5351_set_bits(drvdata, SI5351_CLK0_CTRL + num, SI5351_CLK_PLL_SELECT, | |
572 | (parent == SI5351_MULTISYNTH_SRC_VCO0) ? 0 : | |
573 | SI5351_CLK_PLL_SELECT); | |
574 | return 0; | |
575 | } | |
576 | ||
577 | static unsigned char si5351_msynth_get_parent(struct clk_hw *hw) | |
578 | { | |
579 | struct si5351_hw_data *hwdata = | |
580 | container_of(hw, struct si5351_hw_data, hw); | |
581 | u8 val; | |
582 | ||
583 | val = si5351_reg_read(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num); | |
584 | ||
585 | return (val & SI5351_CLK_PLL_SELECT) ? 1 : 0; | |
586 | } | |
587 | ||
588 | static int si5351_msynth_set_parent(struct clk_hw *hw, u8 index) | |
589 | { | |
590 | struct si5351_hw_data *hwdata = | |
591 | container_of(hw, struct si5351_hw_data, hw); | |
592 | ||
593 | return _si5351_msynth_reparent(hwdata->drvdata, hwdata->num, | |
594 | (index == 0) ? SI5351_MULTISYNTH_SRC_VCO0 : | |
595 | SI5351_MULTISYNTH_SRC_VCO1); | |
596 | } | |
597 | ||
598 | static unsigned long si5351_msynth_recalc_rate(struct clk_hw *hw, | |
599 | unsigned long parent_rate) | |
600 | { | |
601 | struct si5351_hw_data *hwdata = | |
602 | container_of(hw, struct si5351_hw_data, hw); | |
603 | u8 reg = si5351_msynth_params_address(hwdata->num); | |
604 | unsigned long long rate; | |
605 | unsigned long m; | |
606 | ||
607 | if (!hwdata->params.valid) | |
608 | si5351_read_parameters(hwdata->drvdata, reg, &hwdata->params); | |
609 | ||
9abd5f05 SH |
610 | /* |
611 | * multisync0-5: fOUT = (128 * P3 * fIN) / (P1*P3 + P2 + 512*P3) | |
612 | * multisync6-7: fOUT = fIN / P1 | |
613 | */ | |
614 | rate = parent_rate; | |
615 | if (hwdata->num > 5) { | |
616 | m = hwdata->params.p1; | |
45b03d3e SS |
617 | } else if (hwdata->params.p3 == 0) { |
618 | return parent_rate; | |
9abd5f05 SH |
619 | } else if ((si5351_reg_read(hwdata->drvdata, reg + 2) & |
620 | SI5351_OUTPUT_CLK_DIVBY4) == SI5351_OUTPUT_CLK_DIVBY4) { | |
621 | m = 4; | |
622 | } else { | |
623 | rate *= 128 * hwdata->params.p3; | |
624 | m = hwdata->params.p1 * hwdata->params.p3; | |
625 | m += hwdata->params.p2; | |
626 | m += 512 * hwdata->params.p3; | |
627 | } | |
628 | ||
629 | if (m == 0) | |
630 | return 0; | |
631 | do_div(rate, m); | |
632 | ||
633 | dev_dbg(&hwdata->drvdata->client->dev, | |
634 | "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, m = %lu, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 635 | __func__, clk_hw_get_name(hw), |
9abd5f05 SH |
636 | hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, |
637 | m, parent_rate, (unsigned long)rate); | |
638 | ||
639 | return (unsigned long)rate; | |
640 | } | |
641 | ||
642 | static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate, | |
643 | unsigned long *parent_rate) | |
644 | { | |
645 | struct si5351_hw_data *hwdata = | |
646 | container_of(hw, struct si5351_hw_data, hw); | |
647 | unsigned long long lltmp; | |
648 | unsigned long a, b, c; | |
649 | int divby4; | |
650 | ||
651 | /* multisync6-7 can only handle freqencies < 150MHz */ | |
652 | if (hwdata->num >= 6 && rate > SI5351_MULTISYNTH67_MAX_FREQ) | |
653 | rate = SI5351_MULTISYNTH67_MAX_FREQ; | |
654 | ||
655 | /* multisync frequency is 1MHz .. 160MHz */ | |
656 | if (rate > SI5351_MULTISYNTH_MAX_FREQ) | |
657 | rate = SI5351_MULTISYNTH_MAX_FREQ; | |
658 | if (rate < SI5351_MULTISYNTH_MIN_FREQ) | |
659 | rate = SI5351_MULTISYNTH_MIN_FREQ; | |
660 | ||
661 | divby4 = 0; | |
662 | if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ) | |
663 | divby4 = 1; | |
664 | ||
665 | /* multisync can set pll */ | |
98d8a60e | 666 | if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) { |
9abd5f05 SH |
667 | /* |
668 | * find largest integer divider for max | |
669 | * vco frequency and given target rate | |
670 | */ | |
671 | if (divby4 == 0) { | |
672 | lltmp = SI5351_PLL_VCO_MAX; | |
673 | do_div(lltmp, rate); | |
674 | a = (unsigned long)lltmp; | |
675 | } else | |
676 | a = 4; | |
677 | ||
678 | b = 0; | |
679 | c = 1; | |
680 | ||
681 | *parent_rate = a * rate; | |
2073b5e9 SS |
682 | } else if (hwdata->num >= 6) { |
683 | /* determine the closest integer divider */ | |
684 | a = DIV_ROUND_CLOSEST(*parent_rate, rate); | |
685 | if (a < SI5351_MULTISYNTH_A_MIN) | |
686 | a = SI5351_MULTISYNTH_A_MIN; | |
687 | if (a > SI5351_MULTISYNTH67_A_MAX) | |
688 | a = SI5351_MULTISYNTH67_A_MAX; | |
689 | ||
690 | b = 0; | |
691 | c = 1; | |
9abd5f05 SH |
692 | } else { |
693 | unsigned long rfrac, denom; | |
694 | ||
695 | /* disable divby4 */ | |
696 | if (divby4) { | |
697 | rate = SI5351_MULTISYNTH_DIVBY4_FREQ; | |
698 | divby4 = 0; | |
699 | } | |
700 | ||
701 | /* determine integer part of divider equation */ | |
702 | a = *parent_rate / rate; | |
703 | if (a < SI5351_MULTISYNTH_A_MIN) | |
704 | a = SI5351_MULTISYNTH_A_MIN; | |
2073b5e9 | 705 | if (a > SI5351_MULTISYNTH_A_MAX) |
9abd5f05 SH |
706 | a = SI5351_MULTISYNTH_A_MAX; |
707 | ||
708 | /* find best approximation for b/c = fVCO mod fOUT */ | |
709 | denom = 1000 * 1000; | |
710 | lltmp = (*parent_rate) % rate; | |
711 | lltmp *= denom; | |
712 | do_div(lltmp, rate); | |
713 | rfrac = (unsigned long)lltmp; | |
714 | ||
715 | b = 0; | |
716 | c = 1; | |
717 | if (rfrac) | |
718 | rational_best_approximation(rfrac, denom, | |
719 | SI5351_MULTISYNTH_B_MAX, SI5351_MULTISYNTH_C_MAX, | |
720 | &b, &c); | |
721 | } | |
722 | ||
723 | /* recalculate rate by fOUT = fIN / (a + b/c) */ | |
724 | lltmp = *parent_rate; | |
725 | lltmp *= c; | |
726 | do_div(lltmp, a * c + b); | |
727 | rate = (unsigned long)lltmp; | |
728 | ||
729 | /* calculate parameters */ | |
730 | if (divby4) { | |
731 | hwdata->params.p3 = 1; | |
732 | hwdata->params.p2 = 0; | |
733 | hwdata->params.p1 = 0; | |
2073b5e9 SS |
734 | } else if (hwdata->num >= 6) { |
735 | hwdata->params.p3 = 0; | |
736 | hwdata->params.p2 = 0; | |
737 | hwdata->params.p1 = a; | |
9abd5f05 SH |
738 | } else { |
739 | hwdata->params.p3 = c; | |
740 | hwdata->params.p2 = (128 * b) % c; | |
741 | hwdata->params.p1 = 128 * a; | |
742 | hwdata->params.p1 += (128 * b / c); | |
743 | hwdata->params.p1 -= 512; | |
744 | } | |
745 | ||
746 | dev_dbg(&hwdata->drvdata->client->dev, | |
747 | "%s - %s: a = %lu, b = %lu, c = %lu, divby4 = %d, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 748 | __func__, clk_hw_get_name(hw), a, b, c, divby4, |
9abd5f05 SH |
749 | *parent_rate, rate); |
750 | ||
751 | return rate; | |
752 | } | |
753 | ||
754 | static int si5351_msynth_set_rate(struct clk_hw *hw, unsigned long rate, | |
755 | unsigned long parent_rate) | |
756 | { | |
757 | struct si5351_hw_data *hwdata = | |
758 | container_of(hw, struct si5351_hw_data, hw); | |
759 | u8 reg = si5351_msynth_params_address(hwdata->num); | |
760 | int divby4 = 0; | |
761 | ||
762 | /* write multisynth parameters */ | |
763 | si5351_write_parameters(hwdata->drvdata, reg, &hwdata->params); | |
764 | ||
765 | if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ) | |
766 | divby4 = 1; | |
767 | ||
768 | /* enable/disable integer mode and divby4 on multisynth0-5 */ | |
769 | if (hwdata->num < 6) { | |
770 | si5351_set_bits(hwdata->drvdata, reg + 2, | |
771 | SI5351_OUTPUT_CLK_DIVBY4, | |
772 | (divby4) ? SI5351_OUTPUT_CLK_DIVBY4 : 0); | |
773 | si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, | |
774 | SI5351_CLK_INTEGER_MODE, | |
775 | (hwdata->params.p2 == 0) ? SI5351_CLK_INTEGER_MODE : 0); | |
776 | } | |
777 | ||
778 | dev_dbg(&hwdata->drvdata->client->dev, | |
779 | "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, divby4 = %d, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 780 | __func__, clk_hw_get_name(hw), |
9abd5f05 SH |
781 | hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, |
782 | divby4, parent_rate, rate); | |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
787 | static const struct clk_ops si5351_msynth_ops = { | |
788 | .set_parent = si5351_msynth_set_parent, | |
789 | .get_parent = si5351_msynth_get_parent, | |
790 | .recalc_rate = si5351_msynth_recalc_rate, | |
791 | .round_rate = si5351_msynth_round_rate, | |
792 | .set_rate = si5351_msynth_set_rate, | |
793 | }; | |
794 | ||
795 | /* | |
796 | * Si5351 clkout divider | |
797 | */ | |
798 | static int _si5351_clkout_reparent(struct si5351_driver_data *drvdata, | |
799 | int num, enum si5351_clkout_src parent) | |
800 | { | |
801 | u8 val; | |
802 | ||
803 | if (num > 8) | |
804 | return -EINVAL; | |
805 | ||
806 | switch (parent) { | |
807 | case SI5351_CLKOUT_SRC_MSYNTH_N: | |
808 | val = SI5351_CLK_INPUT_MULTISYNTH_N; | |
809 | break; | |
810 | case SI5351_CLKOUT_SRC_MSYNTH_0_4: | |
811 | /* clk0/clk4 can only connect to its own multisync */ | |
812 | if (num == 0 || num == 4) | |
813 | val = SI5351_CLK_INPUT_MULTISYNTH_N; | |
814 | else | |
815 | val = SI5351_CLK_INPUT_MULTISYNTH_0_4; | |
816 | break; | |
817 | case SI5351_CLKOUT_SRC_XTAL: | |
818 | val = SI5351_CLK_INPUT_XTAL; | |
819 | break; | |
820 | case SI5351_CLKOUT_SRC_CLKIN: | |
821 | if (drvdata->variant != SI5351_VARIANT_C) | |
822 | return -EINVAL; | |
823 | ||
824 | val = SI5351_CLK_INPUT_CLKIN; | |
825 | break; | |
826 | default: | |
827 | return 0; | |
828 | } | |
829 | ||
830 | si5351_set_bits(drvdata, SI5351_CLK0_CTRL + num, | |
831 | SI5351_CLK_INPUT_MASK, val); | |
832 | return 0; | |
833 | } | |
834 | ||
835 | static int _si5351_clkout_set_drive_strength( | |
836 | struct si5351_driver_data *drvdata, int num, | |
837 | enum si5351_drive_strength drive) | |
838 | { | |
839 | u8 mask; | |
840 | ||
841 | if (num > 8) | |
842 | return -EINVAL; | |
843 | ||
844 | switch (drive) { | |
845 | case SI5351_DRIVE_2MA: | |
846 | mask = SI5351_CLK_DRIVE_STRENGTH_2MA; | |
847 | break; | |
848 | case SI5351_DRIVE_4MA: | |
849 | mask = SI5351_CLK_DRIVE_STRENGTH_4MA; | |
850 | break; | |
851 | case SI5351_DRIVE_6MA: | |
852 | mask = SI5351_CLK_DRIVE_STRENGTH_6MA; | |
853 | break; | |
854 | case SI5351_DRIVE_8MA: | |
855 | mask = SI5351_CLK_DRIVE_STRENGTH_8MA; | |
856 | break; | |
857 | default: | |
858 | return 0; | |
859 | } | |
860 | ||
861 | si5351_set_bits(drvdata, SI5351_CLK0_CTRL + num, | |
862 | SI5351_CLK_DRIVE_STRENGTH_MASK, mask); | |
863 | return 0; | |
864 | } | |
865 | ||
1a0483d2 SH |
866 | static int _si5351_clkout_set_disable_state( |
867 | struct si5351_driver_data *drvdata, int num, | |
868 | enum si5351_disable_state state) | |
869 | { | |
870 | u8 reg = (num < 4) ? SI5351_CLK3_0_DISABLE_STATE : | |
871 | SI5351_CLK7_4_DISABLE_STATE; | |
872 | u8 shift = (num < 4) ? (2 * num) : (2 * (num-4)); | |
873 | u8 mask = SI5351_CLK_DISABLE_STATE_MASK << shift; | |
874 | u8 val; | |
875 | ||
876 | if (num > 8) | |
877 | return -EINVAL; | |
878 | ||
879 | switch (state) { | |
880 | case SI5351_DISABLE_LOW: | |
881 | val = SI5351_CLK_DISABLE_STATE_LOW; | |
882 | break; | |
883 | case SI5351_DISABLE_HIGH: | |
884 | val = SI5351_CLK_DISABLE_STATE_HIGH; | |
885 | break; | |
886 | case SI5351_DISABLE_FLOATING: | |
887 | val = SI5351_CLK_DISABLE_STATE_FLOAT; | |
888 | break; | |
889 | case SI5351_DISABLE_NEVER: | |
890 | val = SI5351_CLK_DISABLE_STATE_NEVER; | |
891 | break; | |
892 | default: | |
893 | return 0; | |
894 | } | |
895 | ||
896 | si5351_set_bits(drvdata, reg, mask, val << shift); | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
9abd5f05 SH |
901 | static int si5351_clkout_prepare(struct clk_hw *hw) |
902 | { | |
903 | struct si5351_hw_data *hwdata = | |
904 | container_of(hw, struct si5351_hw_data, hw); | |
905 | ||
906 | si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, | |
907 | SI5351_CLK_POWERDOWN, 0); | |
908 | si5351_set_bits(hwdata->drvdata, SI5351_OUTPUT_ENABLE_CTRL, | |
909 | (1 << hwdata->num), 0); | |
910 | return 0; | |
911 | } | |
912 | ||
913 | static void si5351_clkout_unprepare(struct clk_hw *hw) | |
914 | { | |
915 | struct si5351_hw_data *hwdata = | |
916 | container_of(hw, struct si5351_hw_data, hw); | |
917 | ||
918 | si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, | |
919 | SI5351_CLK_POWERDOWN, SI5351_CLK_POWERDOWN); | |
920 | si5351_set_bits(hwdata->drvdata, SI5351_OUTPUT_ENABLE_CTRL, | |
921 | (1 << hwdata->num), (1 << hwdata->num)); | |
922 | } | |
923 | ||
924 | static u8 si5351_clkout_get_parent(struct clk_hw *hw) | |
925 | { | |
926 | struct si5351_hw_data *hwdata = | |
927 | container_of(hw, struct si5351_hw_data, hw); | |
928 | int index = 0; | |
929 | unsigned char val; | |
930 | ||
931 | val = si5351_reg_read(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num); | |
932 | switch (val & SI5351_CLK_INPUT_MASK) { | |
933 | case SI5351_CLK_INPUT_MULTISYNTH_N: | |
934 | index = 0; | |
935 | break; | |
936 | case SI5351_CLK_INPUT_MULTISYNTH_0_4: | |
937 | index = 1; | |
938 | break; | |
939 | case SI5351_CLK_INPUT_XTAL: | |
940 | index = 2; | |
941 | break; | |
942 | case SI5351_CLK_INPUT_CLKIN: | |
943 | index = 3; | |
944 | break; | |
945 | } | |
946 | ||
947 | return index; | |
948 | } | |
949 | ||
950 | static int si5351_clkout_set_parent(struct clk_hw *hw, u8 index) | |
951 | { | |
952 | struct si5351_hw_data *hwdata = | |
953 | container_of(hw, struct si5351_hw_data, hw); | |
954 | enum si5351_clkout_src parent = SI5351_CLKOUT_SRC_DEFAULT; | |
955 | ||
956 | switch (index) { | |
957 | case 0: | |
958 | parent = SI5351_CLKOUT_SRC_MSYNTH_N; | |
959 | break; | |
960 | case 1: | |
961 | parent = SI5351_CLKOUT_SRC_MSYNTH_0_4; | |
962 | break; | |
963 | case 2: | |
964 | parent = SI5351_CLKOUT_SRC_XTAL; | |
965 | break; | |
966 | case 3: | |
967 | parent = SI5351_CLKOUT_SRC_CLKIN; | |
968 | break; | |
969 | } | |
970 | ||
971 | return _si5351_clkout_reparent(hwdata->drvdata, hwdata->num, parent); | |
972 | } | |
973 | ||
974 | static unsigned long si5351_clkout_recalc_rate(struct clk_hw *hw, | |
975 | unsigned long parent_rate) | |
976 | { | |
977 | struct si5351_hw_data *hwdata = | |
978 | container_of(hw, struct si5351_hw_data, hw); | |
979 | unsigned char reg; | |
980 | unsigned char rdiv; | |
981 | ||
67e1e226 | 982 | if (hwdata->num <= 5) |
9abd5f05 SH |
983 | reg = si5351_msynth_params_address(hwdata->num) + 2; |
984 | else | |
985 | reg = SI5351_CLK6_7_OUTPUT_DIVIDER; | |
986 | ||
987 | rdiv = si5351_reg_read(hwdata->drvdata, reg); | |
988 | if (hwdata->num == 6) { | |
989 | rdiv &= SI5351_OUTPUT_CLK6_DIV_MASK; | |
990 | } else { | |
991 | rdiv &= SI5351_OUTPUT_CLK_DIV_MASK; | |
992 | rdiv >>= SI5351_OUTPUT_CLK_DIV_SHIFT; | |
993 | } | |
994 | ||
995 | return parent_rate >> rdiv; | |
996 | } | |
997 | ||
998 | static long si5351_clkout_round_rate(struct clk_hw *hw, unsigned long rate, | |
999 | unsigned long *parent_rate) | |
1000 | { | |
1001 | struct si5351_hw_data *hwdata = | |
1002 | container_of(hw, struct si5351_hw_data, hw); | |
1003 | unsigned char rdiv; | |
1004 | ||
1005 | /* clkout6/7 can only handle output freqencies < 150MHz */ | |
1006 | if (hwdata->num >= 6 && rate > SI5351_CLKOUT67_MAX_FREQ) | |
1007 | rate = SI5351_CLKOUT67_MAX_FREQ; | |
1008 | ||
1009 | /* clkout freqency is 8kHz - 160MHz */ | |
1010 | if (rate > SI5351_CLKOUT_MAX_FREQ) | |
1011 | rate = SI5351_CLKOUT_MAX_FREQ; | |
1012 | if (rate < SI5351_CLKOUT_MIN_FREQ) | |
1013 | rate = SI5351_CLKOUT_MIN_FREQ; | |
1014 | ||
1015 | /* request frequency if multisync master */ | |
98d8a60e | 1016 | if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) { |
9abd5f05 SH |
1017 | /* use r divider for frequencies below 1MHz */ |
1018 | rdiv = SI5351_OUTPUT_CLK_DIV_1; | |
1019 | while (rate < SI5351_MULTISYNTH_MIN_FREQ && | |
1020 | rdiv < SI5351_OUTPUT_CLK_DIV_128) { | |
1021 | rdiv += 1; | |
1022 | rate *= 2; | |
1023 | } | |
1024 | *parent_rate = rate; | |
1025 | } else { | |
1026 | unsigned long new_rate, new_err, err; | |
1027 | ||
1028 | /* round to closed rdiv */ | |
1029 | rdiv = SI5351_OUTPUT_CLK_DIV_1; | |
1030 | new_rate = *parent_rate; | |
1031 | err = abs(new_rate - rate); | |
1032 | do { | |
1033 | new_rate >>= 1; | |
1034 | new_err = abs(new_rate - rate); | |
1035 | if (new_err > err || rdiv == SI5351_OUTPUT_CLK_DIV_128) | |
1036 | break; | |
1037 | rdiv++; | |
1038 | err = new_err; | |
1039 | } while (1); | |
1040 | } | |
1041 | rate = *parent_rate >> rdiv; | |
1042 | ||
1043 | dev_dbg(&hwdata->drvdata->client->dev, | |
1044 | "%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 1045 | __func__, clk_hw_get_name(hw), (1 << rdiv), |
9abd5f05 SH |
1046 | *parent_rate, rate); |
1047 | ||
1048 | return rate; | |
1049 | } | |
1050 | ||
1051 | static int si5351_clkout_set_rate(struct clk_hw *hw, unsigned long rate, | |
1052 | unsigned long parent_rate) | |
1053 | { | |
1054 | struct si5351_hw_data *hwdata = | |
1055 | container_of(hw, struct si5351_hw_data, hw); | |
1056 | unsigned long new_rate, new_err, err; | |
1057 | unsigned char rdiv; | |
1058 | ||
1059 | /* round to closed rdiv */ | |
1060 | rdiv = SI5351_OUTPUT_CLK_DIV_1; | |
1061 | new_rate = parent_rate; | |
1062 | err = abs(new_rate - rate); | |
1063 | do { | |
1064 | new_rate >>= 1; | |
1065 | new_err = abs(new_rate - rate); | |
1066 | if (new_err > err || rdiv == SI5351_OUTPUT_CLK_DIV_128) | |
1067 | break; | |
1068 | rdiv++; | |
1069 | err = new_err; | |
1070 | } while (1); | |
1071 | ||
1072 | /* write output divider */ | |
1073 | switch (hwdata->num) { | |
1074 | case 6: | |
1075 | si5351_set_bits(hwdata->drvdata, SI5351_CLK6_7_OUTPUT_DIVIDER, | |
1076 | SI5351_OUTPUT_CLK6_DIV_MASK, rdiv); | |
1077 | break; | |
1078 | case 7: | |
1079 | si5351_set_bits(hwdata->drvdata, SI5351_CLK6_7_OUTPUT_DIVIDER, | |
1080 | SI5351_OUTPUT_CLK_DIV_MASK, | |
1081 | rdiv << SI5351_OUTPUT_CLK_DIV_SHIFT); | |
1082 | break; | |
1083 | default: | |
1084 | si5351_set_bits(hwdata->drvdata, | |
1085 | si5351_msynth_params_address(hwdata->num) + 2, | |
1086 | SI5351_OUTPUT_CLK_DIV_MASK, | |
1087 | rdiv << SI5351_OUTPUT_CLK_DIV_SHIFT); | |
1088 | } | |
1089 | ||
1090 | /* powerup clkout */ | |
1091 | si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, | |
1092 | SI5351_CLK_POWERDOWN, 0); | |
1093 | ||
1094 | dev_dbg(&hwdata->drvdata->client->dev, | |
1095 | "%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n", | |
44f22a5d | 1096 | __func__, clk_hw_get_name(hw), (1 << rdiv), |
9abd5f05 SH |
1097 | parent_rate, rate); |
1098 | ||
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | static const struct clk_ops si5351_clkout_ops = { | |
1103 | .prepare = si5351_clkout_prepare, | |
1104 | .unprepare = si5351_clkout_unprepare, | |
1105 | .set_parent = si5351_clkout_set_parent, | |
1106 | .get_parent = si5351_clkout_get_parent, | |
1107 | .recalc_rate = si5351_clkout_recalc_rate, | |
1108 | .round_rate = si5351_clkout_round_rate, | |
1109 | .set_rate = si5351_clkout_set_rate, | |
1110 | }; | |
1111 | ||
1112 | /* | |
1113 | * Si5351 i2c probe and DT | |
1114 | */ | |
1115 | #ifdef CONFIG_OF | |
1116 | static const struct of_device_id si5351_dt_ids[] = { | |
1117 | { .compatible = "silabs,si5351a", .data = (void *)SI5351_VARIANT_A, }, | |
1118 | { .compatible = "silabs,si5351a-msop", | |
1119 | .data = (void *)SI5351_VARIANT_A3, }, | |
1120 | { .compatible = "silabs,si5351b", .data = (void *)SI5351_VARIANT_B, }, | |
1121 | { .compatible = "silabs,si5351c", .data = (void *)SI5351_VARIANT_C, }, | |
1122 | { } | |
1123 | }; | |
1124 | MODULE_DEVICE_TABLE(of, si5351_dt_ids); | |
1125 | ||
9d43dc7f SH |
1126 | static int si5351_dt_parse(struct i2c_client *client, |
1127 | enum si5351_variant variant) | |
9abd5f05 SH |
1128 | { |
1129 | struct device_node *child, *np = client->dev.of_node; | |
1130 | struct si5351_platform_data *pdata; | |
9abd5f05 SH |
1131 | struct property *prop; |
1132 | const __be32 *p; | |
1133 | int num = 0; | |
1134 | u32 val; | |
1135 | ||
1136 | if (np == NULL) | |
1137 | return 0; | |
1138 | ||
9abd5f05 SH |
1139 | pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); |
1140 | if (!pdata) | |
1141 | return -ENOMEM; | |
1142 | ||
9abd5f05 SH |
1143 | /* |
1144 | * property silabs,pll-source : <num src>, [<..>] | |
1145 | * allow to selectively set pll source | |
1146 | */ | |
1147 | of_property_for_each_u32(np, "silabs,pll-source", prop, p, num) { | |
1148 | if (num >= 2) { | |
1149 | dev_err(&client->dev, | |
1150 | "invalid pll %d on pll-source prop\n", num); | |
1151 | return -EINVAL; | |
1152 | } | |
1153 | ||
1154 | p = of_prop_next_u32(prop, p, &val); | |
1155 | if (!p) { | |
1156 | dev_err(&client->dev, | |
1157 | "missing pll-source for pll %d\n", num); | |
1158 | return -EINVAL; | |
1159 | } | |
1160 | ||
1161 | switch (val) { | |
1162 | case 0: | |
1163 | pdata->pll_src[num] = SI5351_PLL_SRC_XTAL; | |
1164 | break; | |
1165 | case 1: | |
9d43dc7f | 1166 | if (variant != SI5351_VARIANT_C) { |
9abd5f05 SH |
1167 | dev_err(&client->dev, |
1168 | "invalid parent %d for pll %d\n", | |
1169 | val, num); | |
1170 | return -EINVAL; | |
1171 | } | |
1172 | pdata->pll_src[num] = SI5351_PLL_SRC_CLKIN; | |
1173 | break; | |
1174 | default: | |
1175 | dev_err(&client->dev, | |
1176 | "invalid parent %d for pll %d\n", val, num); | |
1177 | return -EINVAL; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | /* per clkout properties */ | |
1182 | for_each_child_of_node(np, child) { | |
1183 | if (of_property_read_u32(child, "reg", &num)) { | |
1184 | dev_err(&client->dev, "missing reg property of %s\n", | |
1185 | child->name); | |
1186 | return -EINVAL; | |
1187 | } | |
1188 | ||
1189 | if (num >= 8 || | |
9d43dc7f | 1190 | (variant == SI5351_VARIANT_A3 && num >= 3)) { |
9abd5f05 SH |
1191 | dev_err(&client->dev, "invalid clkout %d\n", num); |
1192 | return -EINVAL; | |
1193 | } | |
1194 | ||
1195 | if (!of_property_read_u32(child, "silabs,multisynth-source", | |
1196 | &val)) { | |
1197 | switch (val) { | |
1198 | case 0: | |
1199 | pdata->clkout[num].multisynth_src = | |
1200 | SI5351_MULTISYNTH_SRC_VCO0; | |
1201 | break; | |
1202 | case 1: | |
1203 | pdata->clkout[num].multisynth_src = | |
1204 | SI5351_MULTISYNTH_SRC_VCO1; | |
1205 | break; | |
1206 | default: | |
1207 | dev_err(&client->dev, | |
1208 | "invalid parent %d for multisynth %d\n", | |
1209 | val, num); | |
1210 | return -EINVAL; | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | if (!of_property_read_u32(child, "silabs,clock-source", &val)) { | |
1215 | switch (val) { | |
1216 | case 0: | |
1217 | pdata->clkout[num].clkout_src = | |
1218 | SI5351_CLKOUT_SRC_MSYNTH_N; | |
1219 | break; | |
1220 | case 1: | |
1221 | pdata->clkout[num].clkout_src = | |
1222 | SI5351_CLKOUT_SRC_MSYNTH_0_4; | |
1223 | break; | |
1224 | case 2: | |
1225 | pdata->clkout[num].clkout_src = | |
1226 | SI5351_CLKOUT_SRC_XTAL; | |
1227 | break; | |
1228 | case 3: | |
9d43dc7f | 1229 | if (variant != SI5351_VARIANT_C) { |
9abd5f05 SH |
1230 | dev_err(&client->dev, |
1231 | "invalid parent %d for clkout %d\n", | |
1232 | val, num); | |
1233 | return -EINVAL; | |
1234 | } | |
1235 | pdata->clkout[num].clkout_src = | |
1236 | SI5351_CLKOUT_SRC_CLKIN; | |
1237 | break; | |
1238 | default: | |
1239 | dev_err(&client->dev, | |
1240 | "invalid parent %d for clkout %d\n", | |
1241 | val, num); | |
1242 | return -EINVAL; | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | if (!of_property_read_u32(child, "silabs,drive-strength", | |
1247 | &val)) { | |
1248 | switch (val) { | |
1249 | case SI5351_DRIVE_2MA: | |
1250 | case SI5351_DRIVE_4MA: | |
1251 | case SI5351_DRIVE_6MA: | |
1252 | case SI5351_DRIVE_8MA: | |
1253 | pdata->clkout[num].drive = val; | |
1254 | break; | |
1255 | default: | |
1256 | dev_err(&client->dev, | |
1257 | "invalid drive strength %d for clkout %d\n", | |
1258 | val, num); | |
1259 | return -EINVAL; | |
1260 | } | |
1261 | } | |
1262 | ||
1a0483d2 SH |
1263 | if (!of_property_read_u32(child, "silabs,disable-state", |
1264 | &val)) { | |
1265 | switch (val) { | |
1266 | case 0: | |
1267 | pdata->clkout[num].disable_state = | |
1268 | SI5351_DISABLE_LOW; | |
1269 | break; | |
1270 | case 1: | |
1271 | pdata->clkout[num].disable_state = | |
1272 | SI5351_DISABLE_HIGH; | |
1273 | break; | |
1274 | case 2: | |
1275 | pdata->clkout[num].disable_state = | |
1276 | SI5351_DISABLE_FLOATING; | |
1277 | break; | |
1278 | case 3: | |
1279 | pdata->clkout[num].disable_state = | |
1280 | SI5351_DISABLE_NEVER; | |
1281 | break; | |
1282 | default: | |
1283 | dev_err(&client->dev, | |
1284 | "invalid disable state %d for clkout %d\n", | |
1285 | val, num); | |
1286 | return -EINVAL; | |
1287 | } | |
1288 | } | |
1289 | ||
9abd5f05 SH |
1290 | if (!of_property_read_u32(child, "clock-frequency", &val)) |
1291 | pdata->clkout[num].rate = val; | |
1292 | ||
1293 | pdata->clkout[num].pll_master = | |
1294 | of_property_read_bool(child, "silabs,pll-master"); | |
1295 | } | |
1296 | client->dev.platform_data = pdata; | |
1297 | ||
1298 | return 0; | |
1299 | } | |
1300 | #else | |
d30492ad | 1301 | static int si5351_dt_parse(struct i2c_client *client, enum si5351_variant variant) |
9abd5f05 SH |
1302 | { |
1303 | return 0; | |
1304 | } | |
1305 | #endif /* CONFIG_OF */ | |
1306 | ||
1307 | static int si5351_i2c_probe(struct i2c_client *client, | |
1308 | const struct i2c_device_id *id) | |
1309 | { | |
9d43dc7f | 1310 | enum si5351_variant variant = (enum si5351_variant)id->driver_data; |
9abd5f05 SH |
1311 | struct si5351_platform_data *pdata; |
1312 | struct si5351_driver_data *drvdata; | |
1313 | struct clk_init_data init; | |
1314 | struct clk *clk; | |
1315 | const char *parent_names[4]; | |
1316 | u8 num_parents, num_clocks; | |
1317 | int ret, n; | |
1318 | ||
9d43dc7f | 1319 | ret = si5351_dt_parse(client, variant); |
9abd5f05 SH |
1320 | if (ret) |
1321 | return ret; | |
1322 | ||
1323 | pdata = client->dev.platform_data; | |
1324 | if (!pdata) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | drvdata = devm_kzalloc(&client->dev, sizeof(*drvdata), GFP_KERNEL); | |
1328 | if (drvdata == NULL) { | |
1329 | dev_err(&client->dev, "unable to allocate driver data\n"); | |
1330 | return -ENOMEM; | |
1331 | } | |
1332 | ||
1333 | i2c_set_clientdata(client, drvdata); | |
1334 | drvdata->client = client; | |
9d43dc7f | 1335 | drvdata->variant = variant; |
0cd3be6e SH |
1336 | drvdata->pxtal = devm_clk_get(&client->dev, "xtal"); |
1337 | drvdata->pclkin = devm_clk_get(&client->dev, "clkin"); | |
1338 | ||
1339 | if (PTR_ERR(drvdata->pxtal) == -EPROBE_DEFER || | |
1340 | PTR_ERR(drvdata->pclkin) == -EPROBE_DEFER) | |
1341 | return -EPROBE_DEFER; | |
1342 | ||
1343 | /* | |
1344 | * Check for valid parent clock: VARIANT_A and VARIANT_B need XTAL, | |
1345 | * VARIANT_C can have CLKIN instead. | |
1346 | */ | |
1347 | if (IS_ERR(drvdata->pxtal) && | |
1348 | (drvdata->variant != SI5351_VARIANT_C || IS_ERR(drvdata->pclkin))) { | |
1349 | dev_err(&client->dev, "missing parent clock\n"); | |
1350 | return -EINVAL; | |
1351 | } | |
9abd5f05 SH |
1352 | |
1353 | drvdata->regmap = devm_regmap_init_i2c(client, &si5351_regmap_config); | |
1354 | if (IS_ERR(drvdata->regmap)) { | |
1355 | dev_err(&client->dev, "failed to allocate register map\n"); | |
1356 | return PTR_ERR(drvdata->regmap); | |
1357 | } | |
1358 | ||
1359 | /* Disable interrupts */ | |
1360 | si5351_reg_write(drvdata, SI5351_INTERRUPT_MASK, 0xf0); | |
9abd5f05 SH |
1361 | /* Ensure pll select is on XTAL for Si5351A/B */ |
1362 | if (drvdata->variant != SI5351_VARIANT_C) | |
1363 | si5351_set_bits(drvdata, SI5351_PLL_INPUT_SOURCE, | |
1364 | SI5351_PLLA_SOURCE | SI5351_PLLB_SOURCE, 0); | |
1365 | ||
1366 | /* setup clock configuration */ | |
1367 | for (n = 0; n < 2; n++) { | |
1368 | ret = _si5351_pll_reparent(drvdata, n, pdata->pll_src[n]); | |
1369 | if (ret) { | |
1370 | dev_err(&client->dev, | |
1371 | "failed to reparent pll %d to %d\n", | |
1372 | n, pdata->pll_src[n]); | |
1373 | return ret; | |
1374 | } | |
1375 | } | |
1376 | ||
1377 | for (n = 0; n < 8; n++) { | |
1378 | ret = _si5351_msynth_reparent(drvdata, n, | |
1379 | pdata->clkout[n].multisynth_src); | |
1380 | if (ret) { | |
1381 | dev_err(&client->dev, | |
1382 | "failed to reparent multisynth %d to %d\n", | |
1383 | n, pdata->clkout[n].multisynth_src); | |
1384 | return ret; | |
1385 | } | |
1386 | ||
1387 | ret = _si5351_clkout_reparent(drvdata, n, | |
1388 | pdata->clkout[n].clkout_src); | |
1389 | if (ret) { | |
1390 | dev_err(&client->dev, | |
1391 | "failed to reparent clkout %d to %d\n", | |
1392 | n, pdata->clkout[n].clkout_src); | |
1393 | return ret; | |
1394 | } | |
1395 | ||
1396 | ret = _si5351_clkout_set_drive_strength(drvdata, n, | |
1397 | pdata->clkout[n].drive); | |
1398 | if (ret) { | |
1399 | dev_err(&client->dev, | |
1400 | "failed set drive strength of clkout%d to %d\n", | |
1401 | n, pdata->clkout[n].drive); | |
1402 | return ret; | |
1403 | } | |
1a0483d2 SH |
1404 | |
1405 | ret = _si5351_clkout_set_disable_state(drvdata, n, | |
1406 | pdata->clkout[n].disable_state); | |
1407 | if (ret) { | |
1408 | dev_err(&client->dev, | |
1409 | "failed set disable state of clkout%d to %d\n", | |
1410 | n, pdata->clkout[n].disable_state); | |
1411 | return ret; | |
1412 | } | |
9abd5f05 SH |
1413 | } |
1414 | ||
0cd3be6e SH |
1415 | if (!IS_ERR(drvdata->pxtal)) |
1416 | clk_prepare_enable(drvdata->pxtal); | |
1417 | if (!IS_ERR(drvdata->pclkin)) | |
1418 | clk_prepare_enable(drvdata->pclkin); | |
1419 | ||
9abd5f05 SH |
1420 | /* register xtal input clock gate */ |
1421 | memset(&init, 0, sizeof(init)); | |
1422 | init.name = si5351_input_names[0]; | |
1423 | init.ops = &si5351_xtal_ops; | |
1424 | init.flags = 0; | |
1425 | if (!IS_ERR(drvdata->pxtal)) { | |
1426 | drvdata->pxtal_name = __clk_get_name(drvdata->pxtal); | |
1427 | init.parent_names = &drvdata->pxtal_name; | |
1428 | init.num_parents = 1; | |
1429 | } | |
1430 | drvdata->xtal.init = &init; | |
1431 | clk = devm_clk_register(&client->dev, &drvdata->xtal); | |
1432 | if (IS_ERR(clk)) { | |
1433 | dev_err(&client->dev, "unable to register %s\n", init.name); | |
0cd3be6e SH |
1434 | ret = PTR_ERR(clk); |
1435 | goto err_clk; | |
9abd5f05 SH |
1436 | } |
1437 | ||
1438 | /* register clkin input clock gate */ | |
1439 | if (drvdata->variant == SI5351_VARIANT_C) { | |
1440 | memset(&init, 0, sizeof(init)); | |
1441 | init.name = si5351_input_names[1]; | |
1442 | init.ops = &si5351_clkin_ops; | |
1443 | if (!IS_ERR(drvdata->pclkin)) { | |
1444 | drvdata->pclkin_name = __clk_get_name(drvdata->pclkin); | |
1445 | init.parent_names = &drvdata->pclkin_name; | |
1446 | init.num_parents = 1; | |
1447 | } | |
1448 | drvdata->clkin.init = &init; | |
1449 | clk = devm_clk_register(&client->dev, &drvdata->clkin); | |
1450 | if (IS_ERR(clk)) { | |
1451 | dev_err(&client->dev, "unable to register %s\n", | |
1452 | init.name); | |
0cd3be6e SH |
1453 | ret = PTR_ERR(clk); |
1454 | goto err_clk; | |
9abd5f05 SH |
1455 | } |
1456 | } | |
1457 | ||
1458 | /* Si5351C allows to mux either xtal or clkin to PLL input */ | |
1459 | num_parents = (drvdata->variant == SI5351_VARIANT_C) ? 2 : 1; | |
1460 | parent_names[0] = si5351_input_names[0]; | |
1461 | parent_names[1] = si5351_input_names[1]; | |
1462 | ||
1463 | /* register PLLA */ | |
1464 | drvdata->pll[0].num = 0; | |
1465 | drvdata->pll[0].drvdata = drvdata; | |
1466 | drvdata->pll[0].hw.init = &init; | |
1467 | memset(&init, 0, sizeof(init)); | |
1468 | init.name = si5351_pll_names[0]; | |
1469 | init.ops = &si5351_pll_ops; | |
1470 | init.flags = 0; | |
1471 | init.parent_names = parent_names; | |
1472 | init.num_parents = num_parents; | |
1473 | clk = devm_clk_register(&client->dev, &drvdata->pll[0].hw); | |
1474 | if (IS_ERR(clk)) { | |
1475 | dev_err(&client->dev, "unable to register %s\n", init.name); | |
0cd3be6e SH |
1476 | ret = PTR_ERR(clk); |
1477 | goto err_clk; | |
9abd5f05 SH |
1478 | } |
1479 | ||
1480 | /* register PLLB or VXCO (Si5351B) */ | |
1481 | drvdata->pll[1].num = 1; | |
1482 | drvdata->pll[1].drvdata = drvdata; | |
1483 | drvdata->pll[1].hw.init = &init; | |
1484 | memset(&init, 0, sizeof(init)); | |
1485 | if (drvdata->variant == SI5351_VARIANT_B) { | |
1486 | init.name = si5351_pll_names[2]; | |
1487 | init.ops = &si5351_vxco_ops; | |
1488 | init.flags = CLK_IS_ROOT; | |
1489 | init.parent_names = NULL; | |
1490 | init.num_parents = 0; | |
1491 | } else { | |
1492 | init.name = si5351_pll_names[1]; | |
1493 | init.ops = &si5351_pll_ops; | |
1494 | init.flags = 0; | |
1495 | init.parent_names = parent_names; | |
1496 | init.num_parents = num_parents; | |
1497 | } | |
1498 | clk = devm_clk_register(&client->dev, &drvdata->pll[1].hw); | |
1499 | if (IS_ERR(clk)) { | |
1500 | dev_err(&client->dev, "unable to register %s\n", init.name); | |
0cd3be6e SH |
1501 | ret = PTR_ERR(clk); |
1502 | goto err_clk; | |
9abd5f05 SH |
1503 | } |
1504 | ||
1505 | /* register clk multisync and clk out divider */ | |
1506 | num_clocks = (drvdata->variant == SI5351_VARIANT_A3) ? 3 : 8; | |
1507 | parent_names[0] = si5351_pll_names[0]; | |
1508 | if (drvdata->variant == SI5351_VARIANT_B) | |
1509 | parent_names[1] = si5351_pll_names[2]; | |
1510 | else | |
1511 | parent_names[1] = si5351_pll_names[1]; | |
1512 | ||
1513 | drvdata->msynth = devm_kzalloc(&client->dev, num_clocks * | |
1514 | sizeof(*drvdata->msynth), GFP_KERNEL); | |
1515 | drvdata->clkout = devm_kzalloc(&client->dev, num_clocks * | |
1516 | sizeof(*drvdata->clkout), GFP_KERNEL); | |
1517 | ||
1518 | drvdata->onecell.clk_num = num_clocks; | |
1519 | drvdata->onecell.clks = devm_kzalloc(&client->dev, | |
1520 | num_clocks * sizeof(*drvdata->onecell.clks), GFP_KERNEL); | |
1521 | ||
1522 | if (WARN_ON(!drvdata->msynth || !drvdata->clkout || | |
0cd3be6e SH |
1523 | !drvdata->onecell.clks)) { |
1524 | ret = -ENOMEM; | |
1525 | goto err_clk; | |
1526 | } | |
9abd5f05 SH |
1527 | |
1528 | for (n = 0; n < num_clocks; n++) { | |
1529 | drvdata->msynth[n].num = n; | |
1530 | drvdata->msynth[n].drvdata = drvdata; | |
1531 | drvdata->msynth[n].hw.init = &init; | |
1532 | memset(&init, 0, sizeof(init)); | |
1533 | init.name = si5351_msynth_names[n]; | |
1534 | init.ops = &si5351_msynth_ops; | |
1535 | init.flags = 0; | |
1536 | if (pdata->clkout[n].pll_master) | |
1537 | init.flags |= CLK_SET_RATE_PARENT; | |
1538 | init.parent_names = parent_names; | |
1539 | init.num_parents = 2; | |
1540 | clk = devm_clk_register(&client->dev, &drvdata->msynth[n].hw); | |
1541 | if (IS_ERR(clk)) { | |
1542 | dev_err(&client->dev, "unable to register %s\n", | |
1543 | init.name); | |
0cd3be6e SH |
1544 | ret = PTR_ERR(clk); |
1545 | goto err_clk; | |
9abd5f05 SH |
1546 | } |
1547 | } | |
1548 | ||
1549 | num_parents = (drvdata->variant == SI5351_VARIANT_C) ? 4 : 3; | |
1550 | parent_names[2] = si5351_input_names[0]; | |
1551 | parent_names[3] = si5351_input_names[1]; | |
1552 | for (n = 0; n < num_clocks; n++) { | |
1553 | parent_names[0] = si5351_msynth_names[n]; | |
1554 | parent_names[1] = (n < 4) ? si5351_msynth_names[0] : | |
1555 | si5351_msynth_names[4]; | |
1556 | ||
1557 | drvdata->clkout[n].num = n; | |
1558 | drvdata->clkout[n].drvdata = drvdata; | |
1559 | drvdata->clkout[n].hw.init = &init; | |
1560 | memset(&init, 0, sizeof(init)); | |
1561 | init.name = si5351_clkout_names[n]; | |
1562 | init.ops = &si5351_clkout_ops; | |
1563 | init.flags = 0; | |
1564 | if (pdata->clkout[n].clkout_src == SI5351_CLKOUT_SRC_MSYNTH_N) | |
1565 | init.flags |= CLK_SET_RATE_PARENT; | |
1566 | init.parent_names = parent_names; | |
1567 | init.num_parents = num_parents; | |
1568 | clk = devm_clk_register(&client->dev, &drvdata->clkout[n].hw); | |
1569 | if (IS_ERR(clk)) { | |
1570 | dev_err(&client->dev, "unable to register %s\n", | |
1571 | init.name); | |
0cd3be6e SH |
1572 | ret = PTR_ERR(clk); |
1573 | goto err_clk; | |
9abd5f05 SH |
1574 | } |
1575 | drvdata->onecell.clks[n] = clk; | |
6532cb71 MB |
1576 | |
1577 | /* set initial clkout rate */ | |
1578 | if (pdata->clkout[n].rate != 0) { | |
1579 | int ret; | |
1580 | ret = clk_set_rate(clk, pdata->clkout[n].rate); | |
1581 | if (ret != 0) { | |
1582 | dev_err(&client->dev, "Cannot set rate : %d\n", | |
1583 | ret); | |
1584 | } | |
1585 | } | |
9abd5f05 SH |
1586 | } |
1587 | ||
1588 | ret = of_clk_add_provider(client->dev.of_node, of_clk_src_onecell_get, | |
1589 | &drvdata->onecell); | |
1590 | if (ret) { | |
1591 | dev_err(&client->dev, "unable to add clk provider\n"); | |
0cd3be6e | 1592 | goto err_clk; |
9abd5f05 SH |
1593 | } |
1594 | ||
1595 | return 0; | |
0cd3be6e SH |
1596 | |
1597 | err_clk: | |
1598 | if (!IS_ERR(drvdata->pxtal)) | |
1599 | clk_disable_unprepare(drvdata->pxtal); | |
1600 | if (!IS_ERR(drvdata->pclkin)) | |
1601 | clk_disable_unprepare(drvdata->pclkin); | |
1602 | return ret; | |
9abd5f05 SH |
1603 | } |
1604 | ||
1605 | static const struct i2c_device_id si5351_i2c_ids[] = { | |
9d43dc7f SH |
1606 | { "si5351a", SI5351_VARIANT_A }, |
1607 | { "si5351a-msop", SI5351_VARIANT_A3 }, | |
1608 | { "si5351b", SI5351_VARIANT_B }, | |
1609 | { "si5351c", SI5351_VARIANT_C }, | |
9abd5f05 SH |
1610 | { } |
1611 | }; | |
1612 | MODULE_DEVICE_TABLE(i2c, si5351_i2c_ids); | |
1613 | ||
1614 | static struct i2c_driver si5351_driver = { | |
1615 | .driver = { | |
1616 | .name = "si5351", | |
1617 | .of_match_table = of_match_ptr(si5351_dt_ids), | |
1618 | }, | |
1619 | .probe = si5351_i2c_probe, | |
1620 | .id_table = si5351_i2c_ids, | |
1621 | }; | |
1622 | module_i2c_driver(si5351_driver); | |
1623 | ||
1624 | MODULE_AUTHOR("Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com"); | |
1625 | MODULE_DESCRIPTION("Silicon Labs Si5351A/B/C clock generator driver"); | |
1626 | MODULE_LICENSE("GPL"); |