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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Driver for IDT Versaclock 5
4 *
5 * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
6 */
7
8/*
9 * Possible optimizations:
10 * - Use spread spectrum
11 * - Use integer divider in FOD if applicable
12 */
13
14#include <linux/clk.h>
15#include <linux/clk-provider.h>
16#include <linux/delay.h>
17#include <linux/i2c.h>
18#include <linux/interrupt.h>
19#include <linux/mod_devicetable.h>
20#include <linux/module.h>
21#include <linux/of.h>
22#include <linux/of_platform.h>
23#include <linux/rational.h>
24#include <linux/regmap.h>
25#include <linux/slab.h>
26
27#include <dt-bindings/clk/versaclock.h>
28
29/* VersaClock5 registers */
30#define VC5_OTP_CONTROL 0x00
31
32/* Factory-reserved register block */
33#define VC5_RSVD_DEVICE_ID 0x01
34#define VC5_RSVD_ADC_GAIN_7_0 0x02
35#define VC5_RSVD_ADC_GAIN_15_8 0x03
36#define VC5_RSVD_ADC_OFFSET_7_0 0x04
37#define VC5_RSVD_ADC_OFFSET_15_8 0x05
38#define VC5_RSVD_TEMPY 0x06
39#define VC5_RSVD_OFFSET_TBIN 0x07
40#define VC5_RSVD_GAIN 0x08
41#define VC5_RSVD_TEST_NP 0x09
42#define VC5_RSVD_UNUSED 0x0a
43#define VC5_RSVD_BANDGAP_TRIM_UP 0x0b
44#define VC5_RSVD_BANDGAP_TRIM_DN 0x0c
45#define VC5_RSVD_CLK_R_12_CLK_AMP_4 0x0d
46#define VC5_RSVD_CLK_R_34_CLK_AMP_4 0x0e
47#define VC5_RSVD_CLK_AMP_123 0x0f
48
49/* Configuration register block */
50#define VC5_PRIM_SRC_SHDN 0x10
51#define VC5_PRIM_SRC_SHDN_EN_XTAL BIT(7)
52#define VC5_PRIM_SRC_SHDN_EN_CLKIN BIT(6)
53#define VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ BIT(3)
54#define VC5_PRIM_SRC_SHDN_SP BIT(1)
55#define VC5_PRIM_SRC_SHDN_EN_GBL_SHDN BIT(0)
56
57#define VC5_VCO_BAND 0x11
58#define VC5_XTAL_X1_LOAD_CAP 0x12
59#define VC5_XTAL_X2_LOAD_CAP 0x13
60#define VC5_REF_DIVIDER 0x15
61#define VC5_REF_DIVIDER_SEL_PREDIV2 BIT(7)
62#define VC5_REF_DIVIDER_REF_DIV(n) ((n) & 0x3f)
63
64#define VC5_VCO_CTRL_AND_PREDIV 0x16
65#define VC5_VCO_CTRL_AND_PREDIV_BYPASS_PREDIV BIT(7)
66
67#define VC5_FEEDBACK_INT_DIV 0x17
68#define VC5_FEEDBACK_INT_DIV_BITS 0x18
69#define VC5_FEEDBACK_FRAC_DIV(n) (0x19 + (n))
70#define VC5_RC_CONTROL0 0x1e
71#define VC5_RC_CONTROL1 0x1f
72/* Register 0x20 is factory reserved */
73
74/* Output divider control for divider 1,2,3,4 */
75#define VC5_OUT_DIV_CONTROL(idx) (0x21 + ((idx) * 0x10))
76#define VC5_OUT_DIV_CONTROL_RESET BIT(7)
77#define VC5_OUT_DIV_CONTROL_SELB_NORM BIT(3)
78#define VC5_OUT_DIV_CONTROL_SEL_EXT BIT(2)
79#define VC5_OUT_DIV_CONTROL_INT_MODE BIT(1)
80#define VC5_OUT_DIV_CONTROL_EN_FOD BIT(0)
81
82#define VC5_OUT_DIV_FRAC(idx, n) (0x22 + ((idx) * 0x10) + (n))
83#define VC5_OUT_DIV_FRAC4_OD_SCEE BIT(1)
84
85#define VC5_OUT_DIV_STEP_SPREAD(idx, n) (0x26 + ((idx) * 0x10) + (n))
86#define VC5_OUT_DIV_SPREAD_MOD(idx, n) (0x29 + ((idx) * 0x10) + (n))
87#define VC5_OUT_DIV_SKEW_INT(idx, n) (0x2b + ((idx) * 0x10) + (n))
88#define VC5_OUT_DIV_INT(idx, n) (0x2d + ((idx) * 0x10) + (n))
89#define VC5_OUT_DIV_SKEW_FRAC(idx) (0x2f + ((idx) * 0x10))
90/* Registers 0x30, 0x40, 0x50 are factory reserved */
91
92/* Clock control register for clock 1,2 */
93#define VC5_CLK_OUTPUT_CFG(idx, n) (0x60 + ((idx) * 0x2) + (n))
94#define VC5_CLK_OUTPUT_CFG0_CFG_SHIFT 5
95#define VC5_CLK_OUTPUT_CFG0_CFG_MASK GENMASK(7, VC5_CLK_OUTPUT_CFG0_CFG_SHIFT)
96
97#define VC5_CLK_OUTPUT_CFG0_CFG_LVPECL (VC5_LVPECL)
98#define VC5_CLK_OUTPUT_CFG0_CFG_CMOS (VC5_CMOS)
99#define VC5_CLK_OUTPUT_CFG0_CFG_HCSL33 (VC5_HCSL33)
100#define VC5_CLK_OUTPUT_CFG0_CFG_LVDS (VC5_LVDS)
101#define VC5_CLK_OUTPUT_CFG0_CFG_CMOS2 (VC5_CMOS2)
102#define VC5_CLK_OUTPUT_CFG0_CFG_CMOSD (VC5_CMOSD)
103#define VC5_CLK_OUTPUT_CFG0_CFG_HCSL25 (VC5_HCSL25)
104
105#define VC5_CLK_OUTPUT_CFG0_PWR_SHIFT 3
106#define VC5_CLK_OUTPUT_CFG0_PWR_MASK GENMASK(4, VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
107#define VC5_CLK_OUTPUT_CFG0_PWR_18 (0<<VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
108#define VC5_CLK_OUTPUT_CFG0_PWR_25 (2<<VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
109#define VC5_CLK_OUTPUT_CFG0_PWR_33 (3<<VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
110#define VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT 0
111#define VC5_CLK_OUTPUT_CFG0_SLEW_MASK GENMASK(1, VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
112#define VC5_CLK_OUTPUT_CFG0_SLEW_80 (0<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
113#define VC5_CLK_OUTPUT_CFG0_SLEW_85 (1<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
114#define VC5_CLK_OUTPUT_CFG0_SLEW_90 (2<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
115#define VC5_CLK_OUTPUT_CFG0_SLEW_100 (3<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
116#define VC5_CLK_OUTPUT_CFG1_EN_CLKBUF BIT(0)
117
118#define VC5_CLK_OE_SHDN 0x68
119#define VC5_CLK_OS_SHDN 0x69
120
121#define VC5_GLOBAL_REGISTER 0x76
122#define VC5_GLOBAL_REGISTER_GLOBAL_RESET BIT(5)
123
124/* PLL/VCO runs between 2.5 GHz and 3.0 GHz */
125#define VC5_PLL_VCO_MIN 2500000000UL
126#define VC5_PLL_VCO_MAX 3000000000UL
127
128/* VC5 Input mux settings */
129#define VC5_MUX_IN_XIN BIT(0)
130#define VC5_MUX_IN_CLKIN BIT(1)
131
132/* Maximum number of clk_out supported by this driver */
133#define VC5_MAX_CLK_OUT_NUM 5
134
135/* Maximum number of FODs supported by this driver */
136#define VC5_MAX_FOD_NUM 4
137
138/* flags to describe chip features */
139/* chip has built-in oscilator */
140#define VC5_HAS_INTERNAL_XTAL BIT(0)
141/* chip has PFD requency doubler */
142#define VC5_HAS_PFD_FREQ_DBL BIT(1)
143
144/* Supported IDT VC5 models. */
145enum vc5_model {
146 IDT_VC5_5P49V5923,
147 IDT_VC5_5P49V5925,
148 IDT_VC5_5P49V5933,
149 IDT_VC5_5P49V5935,
150 IDT_VC6_5P49V6901,
151 IDT_VC6_5P49V6965,
152};
153
154/* Structure to describe features of a particular VC5 model */
155struct vc5_chip_info {
156 const enum vc5_model model;
157 const unsigned int clk_fod_cnt;
158 const unsigned int clk_out_cnt;
159 const u32 flags;
160};
161
162struct vc5_driver_data;
163
164struct vc5_hw_data {
165 struct clk_hw hw;
166 struct vc5_driver_data *vc5;
167 u32 div_int;
168 u32 div_frc;
169 unsigned int num;
170};
171
172struct vc5_out_data {
173 struct clk_hw hw;
174 struct vc5_driver_data *vc5;
175 unsigned int num;
176 unsigned int clk_output_cfg0;
177 unsigned int clk_output_cfg0_mask;
178};
179
180struct vc5_driver_data {
181 struct i2c_client *client;
182 struct regmap *regmap;
183 const struct vc5_chip_info *chip_info;
184
185 struct clk *pin_xin;
186 struct clk *pin_clkin;
187 unsigned char clk_mux_ins;
188 struct clk_hw clk_mux;
189 struct clk_hw clk_mul;
190 struct clk_hw clk_pfd;
191 struct vc5_hw_data clk_pll;
192 struct vc5_hw_data clk_fod[VC5_MAX_FOD_NUM];
193 struct vc5_out_data clk_out[VC5_MAX_CLK_OUT_NUM];
194};
195
196/*
197 * VersaClock5 i2c regmap
198 */
199static bool vc5_regmap_is_writeable(struct device *dev, unsigned int reg)
200{
201 /* Factory reserved regs, make them read-only */
202 if (reg <= 0xf)
203 return false;
204
205 /* Factory reserved regs, make them read-only */
206 if (reg == 0x14 || reg == 0x1c || reg == 0x1d)
207 return false;
208
209 return true;
210}
211
212static const struct regmap_config vc5_regmap_config = {
213 .reg_bits = 8,
214 .val_bits = 8,
215 .cache_type = REGCACHE_RBTREE,
216 .max_register = 0x76,
217 .writeable_reg = vc5_regmap_is_writeable,
218};
219
220/*
221 * VersaClock5 input multiplexer between XTAL and CLKIN divider
222 */
223static unsigned char vc5_mux_get_parent(struct clk_hw *hw)
224{
225 struct vc5_driver_data *vc5 =
226 container_of(hw, struct vc5_driver_data, clk_mux);
227 const u8 mask = VC5_PRIM_SRC_SHDN_EN_XTAL | VC5_PRIM_SRC_SHDN_EN_CLKIN;
228 unsigned int src;
229
230 regmap_read(vc5->regmap, VC5_PRIM_SRC_SHDN, &src);
231 src &= mask;
232
233 if (src == VC5_PRIM_SRC_SHDN_EN_XTAL)
234 return 0;
235
236 if (src == VC5_PRIM_SRC_SHDN_EN_CLKIN)
237 return 1;
238
239 dev_warn(&vc5->client->dev,
240 "Invalid clock input configuration (%02x)\n", src);
241 return 0;
242}
243
244static int vc5_mux_set_parent(struct clk_hw *hw, u8 index)
245{
246 struct vc5_driver_data *vc5 =
247 container_of(hw, struct vc5_driver_data, clk_mux);
248 const u8 mask = VC5_PRIM_SRC_SHDN_EN_XTAL | VC5_PRIM_SRC_SHDN_EN_CLKIN;
249 u8 src;
250
251 if ((index > 1) || !vc5->clk_mux_ins)
252 return -EINVAL;
253
254 if (vc5->clk_mux_ins == (VC5_MUX_IN_CLKIN | VC5_MUX_IN_XIN)) {
255 if (index == 0)
256 src = VC5_PRIM_SRC_SHDN_EN_XTAL;
257 if (index == 1)
258 src = VC5_PRIM_SRC_SHDN_EN_CLKIN;
259 } else {
260 if (index != 0)
261 return -EINVAL;
262
263 if (vc5->clk_mux_ins == VC5_MUX_IN_XIN)
264 src = VC5_PRIM_SRC_SHDN_EN_XTAL;
265 else if (vc5->clk_mux_ins == VC5_MUX_IN_CLKIN)
266 src = VC5_PRIM_SRC_SHDN_EN_CLKIN;
267 else /* Invalid; should have been caught by vc5_probe() */
268 return -EINVAL;
269 }
270
271 return regmap_update_bits(vc5->regmap, VC5_PRIM_SRC_SHDN, mask, src);
272}
273
274static const struct clk_ops vc5_mux_ops = {
275 .set_parent = vc5_mux_set_parent,
276 .get_parent = vc5_mux_get_parent,
277};
278
279static unsigned long vc5_dbl_recalc_rate(struct clk_hw *hw,
280 unsigned long parent_rate)
281{
282 struct vc5_driver_data *vc5 =
283 container_of(hw, struct vc5_driver_data, clk_mul);
284 unsigned int premul;
285
286 regmap_read(vc5->regmap, VC5_PRIM_SRC_SHDN, &premul);
287 if (premul & VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ)
288 parent_rate *= 2;
289
290 return parent_rate;
291}
292
293static long vc5_dbl_round_rate(struct clk_hw *hw, unsigned long rate,
294 unsigned long *parent_rate)
295{
296 if ((*parent_rate == rate) || ((*parent_rate * 2) == rate))
297 return rate;
298 else
299 return -EINVAL;
300}
301
302static int vc5_dbl_set_rate(struct clk_hw *hw, unsigned long rate,
303 unsigned long parent_rate)
304{
305 struct vc5_driver_data *vc5 =
306 container_of(hw, struct vc5_driver_data, clk_mul);
307 u32 mask;
308
309 if ((parent_rate * 2) == rate)
310 mask = VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ;
311 else
312 mask = 0;
313
314 regmap_update_bits(vc5->regmap, VC5_PRIM_SRC_SHDN,
315 VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ,
316 mask);
317
318 return 0;
319}
320
321static const struct clk_ops vc5_dbl_ops = {
322 .recalc_rate = vc5_dbl_recalc_rate,
323 .round_rate = vc5_dbl_round_rate,
324 .set_rate = vc5_dbl_set_rate,
325};
326
327static unsigned long vc5_pfd_recalc_rate(struct clk_hw *hw,
328 unsigned long parent_rate)
329{
330 struct vc5_driver_data *vc5 =
331 container_of(hw, struct vc5_driver_data, clk_pfd);
332 unsigned int prediv, div;
333
334 regmap_read(vc5->regmap, VC5_VCO_CTRL_AND_PREDIV, &prediv);
335
336 /* The bypass_prediv is set, PLL fed from Ref_in directly. */
337 if (prediv & VC5_VCO_CTRL_AND_PREDIV_BYPASS_PREDIV)
338 return parent_rate;
339
340 regmap_read(vc5->regmap, VC5_REF_DIVIDER, &div);
341
342 /* The Sel_prediv2 is set, PLL fed from prediv2 (Ref_in / 2) */
343 if (div & VC5_REF_DIVIDER_SEL_PREDIV2)
344 return parent_rate / 2;
345 else
346 return parent_rate / VC5_REF_DIVIDER_REF_DIV(div);
347}
348
349static long vc5_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
350 unsigned long *parent_rate)
351{
352 unsigned long idiv;
353
354 /* PLL cannot operate with input clock above 50 MHz. */
355 if (rate > 50000000)
356 return -EINVAL;
357
358 /* CLKIN within range of PLL input, feed directly to PLL. */
359 if (*parent_rate <= 50000000)
360 return *parent_rate;
361
362 idiv = DIV_ROUND_UP(*parent_rate, rate);
363 if (idiv > 127)
364 return -EINVAL;
365
366 return *parent_rate / idiv;
367}
368
369static int vc5_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
370 unsigned long parent_rate)
371{
372 struct vc5_driver_data *vc5 =
373 container_of(hw, struct vc5_driver_data, clk_pfd);
374 unsigned long idiv;
375 u8 div;
376
377 /* CLKIN within range of PLL input, feed directly to PLL. */
378 if (parent_rate <= 50000000) {
379 regmap_update_bits(vc5->regmap, VC5_VCO_CTRL_AND_PREDIV,
380 VC5_VCO_CTRL_AND_PREDIV_BYPASS_PREDIV,
381 VC5_VCO_CTRL_AND_PREDIV_BYPASS_PREDIV);
382 regmap_update_bits(vc5->regmap, VC5_REF_DIVIDER, 0xff, 0x00);
383 return 0;
384 }
385
386 idiv = DIV_ROUND_UP(parent_rate, rate);
387
388 /* We have dedicated div-2 predivider. */
389 if (idiv == 2)
390 div = VC5_REF_DIVIDER_SEL_PREDIV2;
391 else
392 div = VC5_REF_DIVIDER_REF_DIV(idiv);
393
394 regmap_update_bits(vc5->regmap, VC5_REF_DIVIDER, 0xff, div);
395 regmap_update_bits(vc5->regmap, VC5_VCO_CTRL_AND_PREDIV,
396 VC5_VCO_CTRL_AND_PREDIV_BYPASS_PREDIV, 0);
397
398 return 0;
399}
400
401static const struct clk_ops vc5_pfd_ops = {
402 .recalc_rate = vc5_pfd_recalc_rate,
403 .round_rate = vc5_pfd_round_rate,
404 .set_rate = vc5_pfd_set_rate,
405};
406
407/*
408 * VersaClock5 PLL/VCO
409 */
410static unsigned long vc5_pll_recalc_rate(struct clk_hw *hw,
411 unsigned long parent_rate)
412{
413 struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
414 struct vc5_driver_data *vc5 = hwdata->vc5;
415 u32 div_int, div_frc;
416 u8 fb[5];
417
418 regmap_bulk_read(vc5->regmap, VC5_FEEDBACK_INT_DIV, fb, 5);
419
420 div_int = (fb[0] << 4) | (fb[1] >> 4);
421 div_frc = (fb[2] << 16) | (fb[3] << 8) | fb[4];
422
423 /* The PLL divider has 12 integer bits and 24 fractional bits */
424 return (parent_rate * div_int) + ((parent_rate * div_frc) >> 24);
425}
426
427static long vc5_pll_round_rate(struct clk_hw *hw, unsigned long rate,
428 unsigned long *parent_rate)
429{
430 struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
431 u32 div_int;
432 u64 div_frc;
433
434 if (rate < VC5_PLL_VCO_MIN)
435 rate = VC5_PLL_VCO_MIN;
436 if (rate > VC5_PLL_VCO_MAX)
437 rate = VC5_PLL_VCO_MAX;
438
439 /* Determine integer part, which is 12 bit wide */
440 div_int = rate / *parent_rate;
441 if (div_int > 0xfff)
442 rate = *parent_rate * 0xfff;
443
444 /* Determine best fractional part, which is 24 bit wide */
445 div_frc = rate % *parent_rate;
446 div_frc *= BIT(24) - 1;
447 do_div(div_frc, *parent_rate);
448
449 hwdata->div_int = div_int;
450 hwdata->div_frc = (u32)div_frc;
451
452 return (*parent_rate * div_int) + ((*parent_rate * div_frc) >> 24);
453}
454
455static int vc5_pll_set_rate(struct clk_hw *hw, unsigned long rate,
456 unsigned long parent_rate)
457{
458 struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
459 struct vc5_driver_data *vc5 = hwdata->vc5;
460 u8 fb[5];
461
462 fb[0] = hwdata->div_int >> 4;
463 fb[1] = hwdata->div_int << 4;
464 fb[2] = hwdata->div_frc >> 16;
465 fb[3] = hwdata->div_frc >> 8;
466 fb[4] = hwdata->div_frc;
467
468 return regmap_bulk_write(vc5->regmap, VC5_FEEDBACK_INT_DIV, fb, 5);
469}
470
471static const struct clk_ops vc5_pll_ops = {
472 .recalc_rate = vc5_pll_recalc_rate,
473 .round_rate = vc5_pll_round_rate,
474 .set_rate = vc5_pll_set_rate,
475};
476
477static unsigned long vc5_fod_recalc_rate(struct clk_hw *hw,
478 unsigned long parent_rate)
479{
480 struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
481 struct vc5_driver_data *vc5 = hwdata->vc5;
482 /* VCO frequency is divided by two before entering FOD */
483 u32 f_in = parent_rate / 2;
484 u32 div_int, div_frc;
485 u8 od_int[2];
486 u8 od_frc[4];
487
488 regmap_bulk_read(vc5->regmap, VC5_OUT_DIV_INT(hwdata->num, 0),
489 od_int, 2);
490 regmap_bulk_read(vc5->regmap, VC5_OUT_DIV_FRAC(hwdata->num, 0),
491 od_frc, 4);
492
493 div_int = (od_int[0] << 4) | (od_int[1] >> 4);
494 div_frc = (od_frc[0] << 22) | (od_frc[1] << 14) |
495 (od_frc[2] << 6) | (od_frc[3] >> 2);
496
497 /* Avoid division by zero if the output is not configured. */
498 if (div_int == 0 && div_frc == 0)
499 return 0;
500
501 /* The PLL divider has 12 integer bits and 30 fractional bits */
502 return div64_u64((u64)f_in << 24ULL, ((u64)div_int << 24ULL) + div_frc);
503}
504
505static long vc5_fod_round_rate(struct clk_hw *hw, unsigned long rate,
506 unsigned long *parent_rate)
507{
508 struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
509 /* VCO frequency is divided by two before entering FOD */
510 u32 f_in = *parent_rate / 2;
511 u32 div_int;
512 u64 div_frc;
513
514 /* Determine integer part, which is 12 bit wide */
515 div_int = f_in / rate;
516 /*
517 * WARNING: The clock chip does not output signal if the integer part
518 * of the divider is 0xfff and fractional part is non-zero.
519 * Clamp the divider at 0xffe to keep the code simple.
520 */
521 if (div_int > 0xffe) {
522 div_int = 0xffe;
523 rate = f_in / div_int;
524 }
525
526 /* Determine best fractional part, which is 30 bit wide */
527 div_frc = f_in % rate;
528 div_frc <<= 24;
529 do_div(div_frc, rate);
530
531 hwdata->div_int = div_int;
532 hwdata->div_frc = (u32)div_frc;
533
534 return div64_u64((u64)f_in << 24ULL, ((u64)div_int << 24ULL) + div_frc);
535}
536
537static int vc5_fod_set_rate(struct clk_hw *hw, unsigned long rate,
538 unsigned long parent_rate)
539{
540 struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
541 struct vc5_driver_data *vc5 = hwdata->vc5;
542 u8 data[14] = {
543 hwdata->div_frc >> 22, hwdata->div_frc >> 14,
544 hwdata->div_frc >> 6, hwdata->div_frc << 2,
545 0, 0, 0, 0, 0,
546 0, 0,
547 hwdata->div_int >> 4, hwdata->div_int << 4,
548 0
549 };
550
551 regmap_bulk_write(vc5->regmap, VC5_OUT_DIV_FRAC(hwdata->num, 0),
552 data, 14);
553
554 /*
555 * Toggle magic bit in undocumented register for unknown reason.
556 * This is what the IDT timing commander tool does and the chip
557 * datasheet somewhat implies this is needed, but the register
558 * and the bit is not documented.
559 */
560 regmap_update_bits(vc5->regmap, VC5_GLOBAL_REGISTER,
561 VC5_GLOBAL_REGISTER_GLOBAL_RESET, 0);
562 regmap_update_bits(vc5->regmap, VC5_GLOBAL_REGISTER,
563 VC5_GLOBAL_REGISTER_GLOBAL_RESET,
564 VC5_GLOBAL_REGISTER_GLOBAL_RESET);
565 return 0;
566}
567
568static const struct clk_ops vc5_fod_ops = {
569 .recalc_rate = vc5_fod_recalc_rate,
570 .round_rate = vc5_fod_round_rate,
571 .set_rate = vc5_fod_set_rate,
572};
573
574static int vc5_clk_out_prepare(struct clk_hw *hw)
575{
576 struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
577 struct vc5_driver_data *vc5 = hwdata->vc5;
578 const u8 mask = VC5_OUT_DIV_CONTROL_SELB_NORM |
579 VC5_OUT_DIV_CONTROL_SEL_EXT |
580 VC5_OUT_DIV_CONTROL_EN_FOD;
581 unsigned int src;
582 int ret;
583
584 /*
585 * If the input mux is disabled, enable it first and
586 * select source from matching FOD.
587 */
588 regmap_read(vc5->regmap, VC5_OUT_DIV_CONTROL(hwdata->num), &src);
589 if ((src & mask) == 0) {
590 src = VC5_OUT_DIV_CONTROL_RESET | VC5_OUT_DIV_CONTROL_EN_FOD;
591 ret = regmap_update_bits(vc5->regmap,
592 VC5_OUT_DIV_CONTROL(hwdata->num),
593 mask | VC5_OUT_DIV_CONTROL_RESET, src);
594 if (ret)
595 return ret;
596 }
597
598 /* Enable the clock buffer */
599 regmap_update_bits(vc5->regmap, VC5_CLK_OUTPUT_CFG(hwdata->num, 1),
600 VC5_CLK_OUTPUT_CFG1_EN_CLKBUF,
601 VC5_CLK_OUTPUT_CFG1_EN_CLKBUF);
602 if (hwdata->clk_output_cfg0_mask) {
603 dev_dbg(&vc5->client->dev, "Update output %d mask 0x%0X val 0x%0X\n",
604 hwdata->num, hwdata->clk_output_cfg0_mask,
605 hwdata->clk_output_cfg0);
606
607 regmap_update_bits(vc5->regmap,
608 VC5_CLK_OUTPUT_CFG(hwdata->num, 0),
609 hwdata->clk_output_cfg0_mask,
610 hwdata->clk_output_cfg0);
611 }
612
613 return 0;
614}
615
616static void vc5_clk_out_unprepare(struct clk_hw *hw)
617{
618 struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
619 struct vc5_driver_data *vc5 = hwdata->vc5;
620
621 /* Disable the clock buffer */
622 regmap_update_bits(vc5->regmap, VC5_CLK_OUTPUT_CFG(hwdata->num, 1),
623 VC5_CLK_OUTPUT_CFG1_EN_CLKBUF, 0);
624}
625
626static unsigned char vc5_clk_out_get_parent(struct clk_hw *hw)
627{
628 struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
629 struct vc5_driver_data *vc5 = hwdata->vc5;
630 const u8 mask = VC5_OUT_DIV_CONTROL_SELB_NORM |
631 VC5_OUT_DIV_CONTROL_SEL_EXT |
632 VC5_OUT_DIV_CONTROL_EN_FOD;
633 const u8 fodclkmask = VC5_OUT_DIV_CONTROL_SELB_NORM |
634 VC5_OUT_DIV_CONTROL_EN_FOD;
635 const u8 extclk = VC5_OUT_DIV_CONTROL_SELB_NORM |
636 VC5_OUT_DIV_CONTROL_SEL_EXT;
637 unsigned int src;
638
639 regmap_read(vc5->regmap, VC5_OUT_DIV_CONTROL(hwdata->num), &src);
640 src &= mask;
641
642 if (src == 0) /* Input mux set to DISABLED */
643 return 0;
644
645 if ((src & fodclkmask) == VC5_OUT_DIV_CONTROL_EN_FOD)
646 return 0;
647
648 if (src == extclk)
649 return 1;
650
651 dev_warn(&vc5->client->dev,
652 "Invalid clock output configuration (%02x)\n", src);
653 return 0;
654}
655
656static int vc5_clk_out_set_parent(struct clk_hw *hw, u8 index)
657{
658 struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
659 struct vc5_driver_data *vc5 = hwdata->vc5;
660 const u8 mask = VC5_OUT_DIV_CONTROL_RESET |
661 VC5_OUT_DIV_CONTROL_SELB_NORM |
662 VC5_OUT_DIV_CONTROL_SEL_EXT |
663 VC5_OUT_DIV_CONTROL_EN_FOD;
664 const u8 extclk = VC5_OUT_DIV_CONTROL_SELB_NORM |
665 VC5_OUT_DIV_CONTROL_SEL_EXT;
666 u8 src = VC5_OUT_DIV_CONTROL_RESET;
667
668 if (index == 0)
669 src |= VC5_OUT_DIV_CONTROL_EN_FOD;
670 else
671 src |= extclk;
672
673 return regmap_update_bits(vc5->regmap, VC5_OUT_DIV_CONTROL(hwdata->num),
674 mask, src);
675}
676
677static const struct clk_ops vc5_clk_out_ops = {
678 .prepare = vc5_clk_out_prepare,
679 .unprepare = vc5_clk_out_unprepare,
680 .set_parent = vc5_clk_out_set_parent,
681 .get_parent = vc5_clk_out_get_parent,
682};
683
684static struct clk_hw *vc5_of_clk_get(struct of_phandle_args *clkspec,
685 void *data)
686{
687 struct vc5_driver_data *vc5 = data;
688 unsigned int idx = clkspec->args[0];
689
690 if (idx >= vc5->chip_info->clk_out_cnt)
691 return ERR_PTR(-EINVAL);
692
693 return &vc5->clk_out[idx].hw;
694}
695
696static int vc5_map_index_to_output(const enum vc5_model model,
697 const unsigned int n)
698{
699 switch (model) {
700 case IDT_VC5_5P49V5933:
701 return (n == 0) ? 0 : 3;
702 case IDT_VC5_5P49V5923:
703 case IDT_VC5_5P49V5925:
704 case IDT_VC5_5P49V5935:
705 case IDT_VC6_5P49V6901:
706 case IDT_VC6_5P49V6965:
707 default:
708 return n;
709 }
710}
711
712static int vc5_update_mode(struct device_node *np_output,
713 struct vc5_out_data *clk_out)
714{
715 u32 value;
716
717 if (!of_property_read_u32(np_output, "idt,mode", &value)) {
718 clk_out->clk_output_cfg0_mask |= VC5_CLK_OUTPUT_CFG0_CFG_MASK;
719 switch (value) {
720 case VC5_CLK_OUTPUT_CFG0_CFG_LVPECL:
721 case VC5_CLK_OUTPUT_CFG0_CFG_CMOS:
722 case VC5_CLK_OUTPUT_CFG0_CFG_HCSL33:
723 case VC5_CLK_OUTPUT_CFG0_CFG_LVDS:
724 case VC5_CLK_OUTPUT_CFG0_CFG_CMOS2:
725 case VC5_CLK_OUTPUT_CFG0_CFG_CMOSD:
726 case VC5_CLK_OUTPUT_CFG0_CFG_HCSL25:
727 clk_out->clk_output_cfg0 |=
728 value << VC5_CLK_OUTPUT_CFG0_CFG_SHIFT;
729 break;
730 default:
731 return -EINVAL;
732 }
733 }
734 return 0;
735}
736
737static int vc5_update_power(struct device_node *np_output,
738 struct vc5_out_data *clk_out)
739{
740 u32 value;
741
742 if (!of_property_read_u32(np_output,
743 "idt,voltage-microvolts", &value)) {
744 clk_out->clk_output_cfg0_mask |= VC5_CLK_OUTPUT_CFG0_PWR_MASK;
745 switch (value) {
746 case 1800000:
747 clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_PWR_18;
748 break;
749 case 2500000:
750 clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_PWR_25;
751 break;
752 case 3300000:
753 clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_PWR_33;
754 break;
755 default:
756 return -EINVAL;
757 }
758 }
759 return 0;
760}
761
762static int vc5_update_slew(struct device_node *np_output,
763 struct vc5_out_data *clk_out)
764{
765 u32 value;
766
767 if (!of_property_read_u32(np_output, "idt,slew-percent", &value)) {
768 clk_out->clk_output_cfg0_mask |= VC5_CLK_OUTPUT_CFG0_SLEW_MASK;
769 switch (value) {
770 case 80:
771 clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_SLEW_80;
772 break;
773 case 85:
774 clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_SLEW_85;
775 break;
776 case 90:
777 clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_SLEW_90;
778 break;
779 case 100:
780 clk_out->clk_output_cfg0 |=
781 VC5_CLK_OUTPUT_CFG0_SLEW_100;
782 break;
783 default:
784 return -EINVAL;
785 }
786 }
787 return 0;
788}
789
790static int vc5_get_output_config(struct i2c_client *client,
791 struct vc5_out_data *clk_out)
792{
793 struct device_node *np_output;
794 char *child_name;
795 int ret = 0;
796
797 child_name = kasprintf(GFP_KERNEL, "OUT%d", clk_out->num + 1);
798 if (!child_name)
799 return -ENOMEM;
800
801 np_output = of_get_child_by_name(client->dev.of_node, child_name);
802 kfree(child_name);
803 if (!np_output)
804 return 0;
805
806 ret = vc5_update_mode(np_output, clk_out);
807 if (ret)
808 goto output_error;
809
810 ret = vc5_update_power(np_output, clk_out);
811 if (ret)
812 goto output_error;
813
814 ret = vc5_update_slew(np_output, clk_out);
815
816output_error:
817 if (ret) {
818 dev_err(&client->dev,
819 "Invalid clock output configuration OUT%d\n",
820 clk_out->num + 1);
821 }
822
823 of_node_put(np_output);
824
825 return ret;
826}
827
828static const struct of_device_id clk_vc5_of_match[];
829
830static int vc5_probe(struct i2c_client *client, const struct i2c_device_id *id)
831{
832 struct vc5_driver_data *vc5;
833 struct clk_init_data init;
834 const char *parent_names[2];
835 unsigned int n, idx = 0;
836 int ret;
837
838 vc5 = devm_kzalloc(&client->dev, sizeof(*vc5), GFP_KERNEL);
839 if (!vc5)
840 return -ENOMEM;
841
842 i2c_set_clientdata(client, vc5);
843 vc5->client = client;
844 vc5->chip_info = of_device_get_match_data(&client->dev);
845
846 vc5->pin_xin = devm_clk_get(&client->dev, "xin");
847 if (PTR_ERR(vc5->pin_xin) == -EPROBE_DEFER)
848 return -EPROBE_DEFER;
849
850 vc5->pin_clkin = devm_clk_get(&client->dev, "clkin");
851 if (PTR_ERR(vc5->pin_clkin) == -EPROBE_DEFER)
852 return -EPROBE_DEFER;
853
854 vc5->regmap = devm_regmap_init_i2c(client, &vc5_regmap_config);
855 if (IS_ERR(vc5->regmap)) {
856 dev_err(&client->dev, "failed to allocate register map\n");
857 return PTR_ERR(vc5->regmap);
858 }
859
860 /* Register clock input mux */
861 memset(&init, 0, sizeof(init));
862
863 if (!IS_ERR(vc5->pin_xin)) {
864 vc5->clk_mux_ins |= VC5_MUX_IN_XIN;
865 parent_names[init.num_parents++] = __clk_get_name(vc5->pin_xin);
866 } else if (vc5->chip_info->flags & VC5_HAS_INTERNAL_XTAL) {
867 vc5->pin_xin = clk_register_fixed_rate(&client->dev,
868 "internal-xtal", NULL,
869 0, 25000000);
870 if (IS_ERR(vc5->pin_xin))
871 return PTR_ERR(vc5->pin_xin);
872 vc5->clk_mux_ins |= VC5_MUX_IN_XIN;
873 parent_names[init.num_parents++] = __clk_get_name(vc5->pin_xin);
874 }
875
876 if (!IS_ERR(vc5->pin_clkin)) {
877 vc5->clk_mux_ins |= VC5_MUX_IN_CLKIN;
878 parent_names[init.num_parents++] =
879 __clk_get_name(vc5->pin_clkin);
880 }
881
882 if (!init.num_parents) {
883 dev_err(&client->dev, "no input clock specified!\n");
884 return -EINVAL;
885 }
886
887 init.name = kasprintf(GFP_KERNEL, "%pOFn.mux", client->dev.of_node);
888 init.ops = &vc5_mux_ops;
889 init.flags = 0;
890 init.parent_names = parent_names;
891 vc5->clk_mux.init = &init;
892 ret = devm_clk_hw_register(&client->dev, &vc5->clk_mux);
893 if (ret)
894 goto err_clk_register;
895 kfree(init.name); /* clock framework made a copy of the name */
896
897 if (vc5->chip_info->flags & VC5_HAS_PFD_FREQ_DBL) {
898 /* Register frequency doubler */
899 memset(&init, 0, sizeof(init));
900 init.name = kasprintf(GFP_KERNEL, "%pOFn.dbl",
901 client->dev.of_node);
902 init.ops = &vc5_dbl_ops;
903 init.flags = CLK_SET_RATE_PARENT;
904 init.parent_names = parent_names;
905 parent_names[0] = clk_hw_get_name(&vc5->clk_mux);
906 init.num_parents = 1;
907 vc5->clk_mul.init = &init;
908 ret = devm_clk_hw_register(&client->dev, &vc5->clk_mul);
909 if (ret)
910 goto err_clk_register;
911 kfree(init.name); /* clock framework made a copy of the name */
912 }
913
914 /* Register PFD */
915 memset(&init, 0, sizeof(init));
916 init.name = kasprintf(GFP_KERNEL, "%pOFn.pfd", client->dev.of_node);
917 init.ops = &vc5_pfd_ops;
918 init.flags = CLK_SET_RATE_PARENT;
919 init.parent_names = parent_names;
920 if (vc5->chip_info->flags & VC5_HAS_PFD_FREQ_DBL)
921 parent_names[0] = clk_hw_get_name(&vc5->clk_mul);
922 else
923 parent_names[0] = clk_hw_get_name(&vc5->clk_mux);
924 init.num_parents = 1;
925 vc5->clk_pfd.init = &init;
926 ret = devm_clk_hw_register(&client->dev, &vc5->clk_pfd);
927 if (ret)
928 goto err_clk_register;
929 kfree(init.name); /* clock framework made a copy of the name */
930
931 /* Register PLL */
932 memset(&init, 0, sizeof(init));
933 init.name = kasprintf(GFP_KERNEL, "%pOFn.pll", client->dev.of_node);
934 init.ops = &vc5_pll_ops;
935 init.flags = CLK_SET_RATE_PARENT;
936 init.parent_names = parent_names;
937 parent_names[0] = clk_hw_get_name(&vc5->clk_pfd);
938 init.num_parents = 1;
939 vc5->clk_pll.num = 0;
940 vc5->clk_pll.vc5 = vc5;
941 vc5->clk_pll.hw.init = &init;
942 ret = devm_clk_hw_register(&client->dev, &vc5->clk_pll.hw);
943 if (ret)
944 goto err_clk_register;
945 kfree(init.name); /* clock framework made a copy of the name */
946
947 /* Register FODs */
948 for (n = 0; n < vc5->chip_info->clk_fod_cnt; n++) {
949 idx = vc5_map_index_to_output(vc5->chip_info->model, n);
950 memset(&init, 0, sizeof(init));
951 init.name = kasprintf(GFP_KERNEL, "%pOFn.fod%d",
952 client->dev.of_node, idx);
953 init.ops = &vc5_fod_ops;
954 init.flags = CLK_SET_RATE_PARENT;
955 init.parent_names = parent_names;
956 parent_names[0] = clk_hw_get_name(&vc5->clk_pll.hw);
957 init.num_parents = 1;
958 vc5->clk_fod[n].num = idx;
959 vc5->clk_fod[n].vc5 = vc5;
960 vc5->clk_fod[n].hw.init = &init;
961 ret = devm_clk_hw_register(&client->dev, &vc5->clk_fod[n].hw);
962 if (ret)
963 goto err_clk_register;
964 kfree(init.name); /* clock framework made a copy of the name */
965 }
966
967 /* Register MUX-connected OUT0_I2C_SELB output */
968 memset(&init, 0, sizeof(init));
969 init.name = kasprintf(GFP_KERNEL, "%pOFn.out0_sel_i2cb",
970 client->dev.of_node);
971 init.ops = &vc5_clk_out_ops;
972 init.flags = CLK_SET_RATE_PARENT;
973 init.parent_names = parent_names;
974 parent_names[0] = clk_hw_get_name(&vc5->clk_mux);
975 init.num_parents = 1;
976 vc5->clk_out[0].num = idx;
977 vc5->clk_out[0].vc5 = vc5;
978 vc5->clk_out[0].hw.init = &init;
979 ret = devm_clk_hw_register(&client->dev, &vc5->clk_out[0].hw);
980 if (ret)
981 goto err_clk_register;
982 kfree(init.name); /* clock framework made a copy of the name */
983
984 /* Register FOD-connected OUTx outputs */
985 for (n = 1; n < vc5->chip_info->clk_out_cnt; n++) {
986 idx = vc5_map_index_to_output(vc5->chip_info->model, n - 1);
987 parent_names[0] = clk_hw_get_name(&vc5->clk_fod[idx].hw);
988 if (n == 1)
989 parent_names[1] = clk_hw_get_name(&vc5->clk_mux);
990 else
991 parent_names[1] =
992 clk_hw_get_name(&vc5->clk_out[n - 1].hw);
993
994 memset(&init, 0, sizeof(init));
995 init.name = kasprintf(GFP_KERNEL, "%pOFn.out%d",
996 client->dev.of_node, idx + 1);
997 init.ops = &vc5_clk_out_ops;
998 init.flags = CLK_SET_RATE_PARENT;
999 init.parent_names = parent_names;
1000 init.num_parents = 2;
1001 vc5->clk_out[n].num = idx;
1002 vc5->clk_out[n].vc5 = vc5;
1003 vc5->clk_out[n].hw.init = &init;
1004 ret = devm_clk_hw_register(&client->dev, &vc5->clk_out[n].hw);
1005 if (ret)
1006 goto err_clk_register;
1007 kfree(init.name); /* clock framework made a copy of the name */
1008
1009 /* Fetch Clock Output configuration from DT (if specified) */
1010 ret = vc5_get_output_config(client, &vc5->clk_out[n]);
1011 if (ret)
1012 goto err_clk;
1013 }
1014
1015 ret = of_clk_add_hw_provider(client->dev.of_node, vc5_of_clk_get, vc5);
1016 if (ret) {
1017 dev_err(&client->dev, "unable to add clk provider\n");
1018 goto err_clk;
1019 }
1020
1021 return 0;
1022
1023err_clk_register:
1024 dev_err(&client->dev, "unable to register %s\n", init.name);
1025 kfree(init.name); /* clock framework made a copy of the name */
1026err_clk:
1027 if (vc5->chip_info->flags & VC5_HAS_INTERNAL_XTAL)
1028 clk_unregister_fixed_rate(vc5->pin_xin);
1029 return ret;
1030}
1031
1032static int vc5_remove(struct i2c_client *client)
1033{
1034 struct vc5_driver_data *vc5 = i2c_get_clientdata(client);
1035
1036 of_clk_del_provider(client->dev.of_node);
1037
1038 if (vc5->chip_info->flags & VC5_HAS_INTERNAL_XTAL)
1039 clk_unregister_fixed_rate(vc5->pin_xin);
1040
1041 return 0;
1042}
1043
1044static int __maybe_unused vc5_suspend(struct device *dev)
1045{
1046 struct vc5_driver_data *vc5 = dev_get_drvdata(dev);
1047
1048 regcache_cache_only(vc5->regmap, true);
1049 regcache_mark_dirty(vc5->regmap);
1050
1051 return 0;
1052}
1053
1054static int __maybe_unused vc5_resume(struct device *dev)
1055{
1056 struct vc5_driver_data *vc5 = dev_get_drvdata(dev);
1057 int ret;
1058
1059 regcache_cache_only(vc5->regmap, false);
1060 ret = regcache_sync(vc5->regmap);
1061 if (ret)
1062 dev_err(dev, "Failed to restore register map: %d\n", ret);
1063 return ret;
1064}
1065
1066static const struct vc5_chip_info idt_5p49v5923_info = {
1067 .model = IDT_VC5_5P49V5923,
1068 .clk_fod_cnt = 2,
1069 .clk_out_cnt = 3,
1070 .flags = 0,
1071};
1072
1073static const struct vc5_chip_info idt_5p49v5925_info = {
1074 .model = IDT_VC5_5P49V5925,
1075 .clk_fod_cnt = 4,
1076 .clk_out_cnt = 5,
1077 .flags = 0,
1078};
1079
1080static const struct vc5_chip_info idt_5p49v5933_info = {
1081 .model = IDT_VC5_5P49V5933,
1082 .clk_fod_cnt = 2,
1083 .clk_out_cnt = 3,
1084 .flags = VC5_HAS_INTERNAL_XTAL,
1085};
1086
1087static const struct vc5_chip_info idt_5p49v5935_info = {
1088 .model = IDT_VC5_5P49V5935,
1089 .clk_fod_cnt = 4,
1090 .clk_out_cnt = 5,
1091 .flags = VC5_HAS_INTERNAL_XTAL,
1092};
1093
1094static const struct vc5_chip_info idt_5p49v6901_info = {
1095 .model = IDT_VC6_5P49V6901,
1096 .clk_fod_cnt = 4,
1097 .clk_out_cnt = 5,
1098 .flags = VC5_HAS_PFD_FREQ_DBL,
1099};
1100
1101static const struct vc5_chip_info idt_5p49v6965_info = {
1102 .model = IDT_VC6_5P49V6965,
1103 .clk_fod_cnt = 4,
1104 .clk_out_cnt = 5,
1105 .flags = 0,
1106};
1107
1108static const struct i2c_device_id vc5_id[] = {
1109 { "5p49v5923", .driver_data = IDT_VC5_5P49V5923 },
1110 { "5p49v5925", .driver_data = IDT_VC5_5P49V5925 },
1111 { "5p49v5933", .driver_data = IDT_VC5_5P49V5933 },
1112 { "5p49v5935", .driver_data = IDT_VC5_5P49V5935 },
1113 { "5p49v6901", .driver_data = IDT_VC6_5P49V6901 },
1114 { "5p49v6965", .driver_data = IDT_VC6_5P49V6965 },
1115 { }
1116};
1117MODULE_DEVICE_TABLE(i2c, vc5_id);
1118
1119static const struct of_device_id clk_vc5_of_match[] = {
1120 { .compatible = "idt,5p49v5923", .data = &idt_5p49v5923_info },
1121 { .compatible = "idt,5p49v5925", .data = &idt_5p49v5925_info },
1122 { .compatible = "idt,5p49v5933", .data = &idt_5p49v5933_info },
1123 { .compatible = "idt,5p49v5935", .data = &idt_5p49v5935_info },
1124 { .compatible = "idt,5p49v6901", .data = &idt_5p49v6901_info },
1125 { .compatible = "idt,5p49v6965", .data = &idt_5p49v6965_info },
1126 { },
1127};
1128MODULE_DEVICE_TABLE(of, clk_vc5_of_match);
1129
1130static SIMPLE_DEV_PM_OPS(vc5_pm_ops, vc5_suspend, vc5_resume);
1131
1132static struct i2c_driver vc5_driver = {
1133 .driver = {
1134 .name = "vc5",
1135 .pm = &vc5_pm_ops,
1136 .of_match_table = clk_vc5_of_match,
1137 },
1138 .probe = vc5_probe,
1139 .remove = vc5_remove,
1140 .id_table = vc5_id,
1141};
1142module_i2c_driver(vc5_driver);
1143
1144MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
1145MODULE_DESCRIPTION("IDT VersaClock 5 driver");
1146MODULE_LICENSE("GPL");