2 * Copyright (C) STMicroelectronics 2016
4 * Author: Benjamin Gaignard <benjamin.gaignard@st.com>
6 * License terms: GNU General Public License (GPL), version 2
9 #include <linux/iio/iio.h>
10 #include <linux/iio/sysfs.h>
11 #include <linux/iio/timer/stm32-timer-trigger.h>
12 #include <linux/iio/trigger.h>
13 #include <linux/mfd/stm32-timers.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/of_device.h>
18 #define MAX_TRIGGERS 7
21 /* List the triggers created by each timer */
22 static const void *triggers_table[][MAX_TRIGGERS] = {
23 { TIM1_TRGO, TIM1_TRGO2, TIM1_CH1, TIM1_CH2, TIM1_CH3, TIM1_CH4,},
24 { TIM2_TRGO, TIM2_CH1, TIM2_CH2, TIM2_CH3, TIM2_CH4,},
25 { TIM3_TRGO, TIM3_CH1, TIM3_CH2, TIM3_CH3, TIM3_CH4,},
26 { TIM4_TRGO, TIM4_CH1, TIM4_CH2, TIM4_CH3, TIM4_CH4,},
27 { TIM5_TRGO, TIM5_CH1, TIM5_CH2, TIM5_CH3, TIM5_CH4,},
30 { TIM8_TRGO, TIM8_TRGO2, TIM8_CH1, TIM8_CH2, TIM8_CH3, TIM8_CH4,},
31 { TIM9_TRGO, TIM9_CH1, TIM9_CH2,},
34 { TIM12_TRGO, TIM12_CH1, TIM12_CH2,},
42 /* List the triggers accepted by each timer */
43 static const void *valids_table[][MAX_VALIDS] = {
44 { TIM5_TRGO, TIM2_TRGO, TIM3_TRGO, TIM4_TRGO,},
45 { TIM1_TRGO, TIM8_TRGO, TIM3_TRGO, TIM4_TRGO,},
46 { TIM1_TRGO, TIM2_TRGO, TIM5_TRGO, TIM4_TRGO,},
47 { TIM1_TRGO, TIM2_TRGO, TIM3_TRGO, TIM8_TRGO,},
48 { TIM2_TRGO, TIM3_TRGO, TIM4_TRGO, TIM8_TRGO,},
51 { TIM1_TRGO, TIM2_TRGO, TIM4_TRGO, TIM5_TRGO,},
52 { TIM2_TRGO, TIM3_TRGO, TIM10_OC1, TIM11_OC1,},
55 { TIM4_TRGO, TIM5_TRGO, TIM13_OC1, TIM14_OC1,},
58 static const void *stm32h7_valids_table[][MAX_VALIDS] = {
59 { TIM15_TRGO, TIM2_TRGO, TIM3_TRGO, TIM4_TRGO,},
60 { TIM1_TRGO, TIM8_TRGO, TIM3_TRGO, TIM4_TRGO,},
61 { TIM1_TRGO, TIM2_TRGO, TIM15_TRGO, TIM4_TRGO,},
62 { TIM1_TRGO, TIM2_TRGO, TIM3_TRGO, TIM8_TRGO,},
63 { TIM1_TRGO, TIM8_TRGO, TIM3_TRGO, TIM4_TRGO,},
66 { TIM1_TRGO, TIM2_TRGO, TIM4_TRGO, TIM5_TRGO,},
70 { TIM4_TRGO, TIM5_TRGO, TIM13_OC1, TIM14_OC1,},
73 { TIM1_TRGO, TIM3_TRGO, TIM16_OC1, TIM17_OC1,},
78 struct stm32_timer_trigger {
80 struct regmap *regmap;
88 struct stm32_timer_trigger_cfg {
89 const void *(*valids_table)[MAX_VALIDS];
90 const unsigned int num_valids_table;
93 static bool stm32_timer_is_trgo2_name(const char *name)
95 return !!strstr(name, "trgo2");
98 static bool stm32_timer_is_trgo_name(const char *name)
100 return (!!strstr(name, "trgo") && !strstr(name, "trgo2"));
103 static int stm32_timer_start(struct stm32_timer_trigger *priv,
104 struct iio_trigger *trig,
105 unsigned int frequency)
107 unsigned long long prd, div;
111 /* Period and prescaler values depends of clock rate */
112 div = (unsigned long long)clk_get_rate(priv->clk);
114 do_div(div, frequency);
119 * Increase prescaler value until we get a result that fit
120 * with auto reload register maximum value.
122 while (div > priv->max_arr) {
125 do_div(div, (prescaler + 1));
129 if (prescaler > MAX_TIM_PSC) {
130 dev_err(priv->dev, "prescaler exceeds the maximum value\n");
134 /* Check if nobody else use the timer */
135 regmap_read(priv->regmap, TIM_CCER, &ccer);
136 if (ccer & TIM_CCER_CCXE)
139 regmap_read(priv->regmap, TIM_CR1, &cr1);
140 if (!(cr1 & TIM_CR1_CEN))
141 clk_enable(priv->clk);
143 regmap_write(priv->regmap, TIM_PSC, prescaler);
144 regmap_write(priv->regmap, TIM_ARR, prd - 1);
145 regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, TIM_CR1_ARPE);
147 /* Force master mode to update mode */
148 if (stm32_timer_is_trgo2_name(trig->name))
149 regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2,
150 0x2 << TIM_CR2_MMS2_SHIFT);
152 regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS,
153 0x2 << TIM_CR2_MMS_SHIFT);
155 /* Make sure that registers are updated */
156 regmap_update_bits(priv->regmap, TIM_EGR, TIM_EGR_UG, TIM_EGR_UG);
158 /* Enable controller */
159 regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, TIM_CR1_CEN);
164 static void stm32_timer_stop(struct stm32_timer_trigger *priv,
165 struct iio_trigger *trig)
169 regmap_read(priv->regmap, TIM_CCER, &ccer);
170 if (ccer & TIM_CCER_CCXE)
173 regmap_read(priv->regmap, TIM_CR1, &cr1);
174 if (cr1 & TIM_CR1_CEN)
175 clk_disable(priv->clk);
178 regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0);
179 regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, 0);
180 regmap_write(priv->regmap, TIM_PSC, 0);
181 regmap_write(priv->regmap, TIM_ARR, 0);
183 /* Force disable master mode */
184 if (stm32_timer_is_trgo2_name(trig->name))
185 regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2, 0);
187 regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS, 0);
189 /* Make sure that registers are updated */
190 regmap_update_bits(priv->regmap, TIM_EGR, TIM_EGR_UG, TIM_EGR_UG);
193 static ssize_t stm32_tt_store_frequency(struct device *dev,
194 struct device_attribute *attr,
195 const char *buf, size_t len)
197 struct iio_trigger *trig = to_iio_trigger(dev);
198 struct stm32_timer_trigger *priv = iio_trigger_get_drvdata(trig);
202 ret = kstrtouint(buf, 10, &freq);
207 stm32_timer_stop(priv, trig);
209 ret = stm32_timer_start(priv, trig, freq);
217 static ssize_t stm32_tt_read_frequency(struct device *dev,
218 struct device_attribute *attr, char *buf)
220 struct iio_trigger *trig = to_iio_trigger(dev);
221 struct stm32_timer_trigger *priv = iio_trigger_get_drvdata(trig);
223 unsigned long long freq = 0;
225 regmap_read(priv->regmap, TIM_CR1, &cr1);
226 regmap_read(priv->regmap, TIM_PSC, &psc);
227 regmap_read(priv->regmap, TIM_ARR, &arr);
229 if (cr1 & TIM_CR1_CEN) {
230 freq = (unsigned long long)clk_get_rate(priv->clk);
231 do_div(freq, psc + 1);
232 do_div(freq, arr + 1);
235 return sprintf(buf, "%d\n", (unsigned int)freq);
238 static IIO_DEV_ATTR_SAMP_FREQ(0660,
239 stm32_tt_read_frequency,
240 stm32_tt_store_frequency);
242 #define MASTER_MODE_MAX 7
243 #define MASTER_MODE2_MAX 15
245 static char *master_mode_table[] = {
254 /* Master mode selection 2 only */
257 "compare_pulse_OC4REF",
258 "compare_pulse_OC6REF",
259 "compare_pulse_OC4REF_r_or_OC6REF_r",
260 "compare_pulse_OC4REF_r_or_OC6REF_f",
261 "compare_pulse_OC5REF_r_or_OC6REF_r",
262 "compare_pulse_OC5REF_r_or_OC6REF_f",
265 static ssize_t stm32_tt_show_master_mode(struct device *dev,
266 struct device_attribute *attr,
269 struct stm32_timer_trigger *priv = dev_get_drvdata(dev);
270 struct iio_trigger *trig = to_iio_trigger(dev);
273 regmap_read(priv->regmap, TIM_CR2, &cr2);
275 if (stm32_timer_is_trgo2_name(trig->name))
276 cr2 = (cr2 & TIM_CR2_MMS2) >> TIM_CR2_MMS2_SHIFT;
278 cr2 = (cr2 & TIM_CR2_MMS) >> TIM_CR2_MMS_SHIFT;
280 return snprintf(buf, PAGE_SIZE, "%s\n", master_mode_table[cr2]);
283 static ssize_t stm32_tt_store_master_mode(struct device *dev,
284 struct device_attribute *attr,
285 const char *buf, size_t len)
287 struct stm32_timer_trigger *priv = dev_get_drvdata(dev);
288 struct iio_trigger *trig = to_iio_trigger(dev);
289 u32 mask, shift, master_mode_max;
292 if (stm32_timer_is_trgo2_name(trig->name)) {
294 shift = TIM_CR2_MMS2_SHIFT;
295 master_mode_max = MASTER_MODE2_MAX;
298 shift = TIM_CR2_MMS_SHIFT;
299 master_mode_max = MASTER_MODE_MAX;
302 for (i = 0; i <= master_mode_max; i++) {
303 if (!strncmp(master_mode_table[i], buf,
304 strlen(master_mode_table[i]))) {
305 regmap_update_bits(priv->regmap, TIM_CR2, mask,
307 /* Make sure that registers are updated */
308 regmap_update_bits(priv->regmap, TIM_EGR,
309 TIM_EGR_UG, TIM_EGR_UG);
317 static ssize_t stm32_tt_show_master_mode_avail(struct device *dev,
318 struct device_attribute *attr,
321 struct iio_trigger *trig = to_iio_trigger(dev);
322 unsigned int i, master_mode_max;
325 if (stm32_timer_is_trgo2_name(trig->name))
326 master_mode_max = MASTER_MODE2_MAX;
328 master_mode_max = MASTER_MODE_MAX;
330 for (i = 0; i <= master_mode_max; i++)
331 len += scnprintf(buf + len, PAGE_SIZE - len,
332 "%s ", master_mode_table[i]);
334 /* replace trailing space by newline */
340 static IIO_DEVICE_ATTR(master_mode_available, 0444,
341 stm32_tt_show_master_mode_avail, NULL, 0);
343 static IIO_DEVICE_ATTR(master_mode, 0660,
344 stm32_tt_show_master_mode,
345 stm32_tt_store_master_mode,
348 static struct attribute *stm32_trigger_attrs[] = {
349 &iio_dev_attr_sampling_frequency.dev_attr.attr,
350 &iio_dev_attr_master_mode.dev_attr.attr,
351 &iio_dev_attr_master_mode_available.dev_attr.attr,
355 static const struct attribute_group stm32_trigger_attr_group = {
356 .attrs = stm32_trigger_attrs,
359 static const struct attribute_group *stm32_trigger_attr_groups[] = {
360 &stm32_trigger_attr_group,
364 static const struct iio_trigger_ops timer_trigger_ops = {
365 .owner = THIS_MODULE,
368 static int stm32_setup_iio_triggers(struct stm32_timer_trigger *priv)
371 const char * const *cur = priv->triggers;
373 while (cur && *cur) {
374 struct iio_trigger *trig;
375 bool cur_is_trgo = stm32_timer_is_trgo_name(*cur);
376 bool cur_is_trgo2 = stm32_timer_is_trgo2_name(*cur);
378 if (cur_is_trgo2 && !priv->has_trgo2) {
383 trig = devm_iio_trigger_alloc(priv->dev, "%s", *cur);
387 trig->dev.parent = priv->dev->parent;
388 trig->ops = &timer_trigger_ops;
391 * sampling frequency and master mode attributes
392 * should only be available on trgo/trgo2 triggers
394 if (cur_is_trgo || cur_is_trgo2)
395 trig->dev.groups = stm32_trigger_attr_groups;
397 iio_trigger_set_drvdata(trig, priv);
399 ret = devm_iio_trigger_register(priv->dev, trig);
408 static int stm32_counter_read_raw(struct iio_dev *indio_dev,
409 struct iio_chan_spec const *chan,
410 int *val, int *val2, long mask)
412 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
416 case IIO_CHAN_INFO_RAW:
417 regmap_read(priv->regmap, TIM_CNT, &dat);
421 case IIO_CHAN_INFO_ENABLE:
422 regmap_read(priv->regmap, TIM_CR1, &dat);
423 *val = (dat & TIM_CR1_CEN) ? 1 : 0;
426 case IIO_CHAN_INFO_SCALE:
427 regmap_read(priv->regmap, TIM_SMCR, &dat);
433 /* in quadrature case scale = 0.25 */
437 return IIO_VAL_FRACTIONAL_LOG2;
443 static int stm32_counter_write_raw(struct iio_dev *indio_dev,
444 struct iio_chan_spec const *chan,
445 int val, int val2, long mask)
447 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
451 case IIO_CHAN_INFO_RAW:
452 return regmap_write(priv->regmap, TIM_CNT, val);
454 case IIO_CHAN_INFO_SCALE:
458 case IIO_CHAN_INFO_ENABLE:
460 regmap_read(priv->regmap, TIM_CR1, &dat);
461 if (!(dat & TIM_CR1_CEN))
462 clk_enable(priv->clk);
463 regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN,
466 regmap_read(priv->regmap, TIM_CR1, &dat);
467 regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN,
469 if (dat & TIM_CR1_CEN)
470 clk_disable(priv->clk);
478 static int stm32_counter_validate_trigger(struct iio_dev *indio_dev,
479 struct iio_trigger *trig)
481 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
482 const char * const *cur = priv->valids;
485 if (!is_stm32_timer_trigger(trig))
488 while (cur && *cur) {
489 if (!strncmp(trig->name, *cur, strlen(trig->name))) {
490 regmap_update_bits(priv->regmap,
491 TIM_SMCR, TIM_SMCR_TS,
492 i << TIM_SMCR_TS_SHIFT);
502 static const struct iio_info stm32_trigger_info = {
503 .driver_module = THIS_MODULE,
504 .validate_trigger = stm32_counter_validate_trigger,
505 .read_raw = stm32_counter_read_raw,
506 .write_raw = stm32_counter_write_raw
509 static const char *const stm32_trigger_modes[] = {
513 static int stm32_set_trigger_mode(struct iio_dev *indio_dev,
514 const struct iio_chan_spec *chan,
517 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
519 regmap_update_bits(priv->regmap, TIM_SMCR, TIM_SMCR_SMS, TIM_SMCR_SMS);
524 static int stm32_get_trigger_mode(struct iio_dev *indio_dev,
525 const struct iio_chan_spec *chan)
527 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
530 regmap_read(priv->regmap, TIM_SMCR, &smcr);
532 return (smcr & TIM_SMCR_SMS) == TIM_SMCR_SMS ? 0 : -EINVAL;
535 static const struct iio_enum stm32_trigger_mode_enum = {
536 .items = stm32_trigger_modes,
537 .num_items = ARRAY_SIZE(stm32_trigger_modes),
538 .set = stm32_set_trigger_mode,
539 .get = stm32_get_trigger_mode
542 static const char *const stm32_enable_modes[] = {
548 static int stm32_enable_mode2sms(int mode)
562 static int stm32_set_enable_mode(struct iio_dev *indio_dev,
563 const struct iio_chan_spec *chan,
566 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
567 int sms = stm32_enable_mode2sms(mode);
573 * Triggered mode sets CEN bit automatically by hardware. So, first
574 * enable counter clock, so it can use it. Keeps it in sync with CEN.
577 regmap_read(priv->regmap, TIM_CR1, &val);
578 if (!(val & TIM_CR1_CEN))
579 clk_enable(priv->clk);
582 regmap_update_bits(priv->regmap, TIM_SMCR, TIM_SMCR_SMS, sms);
587 static int stm32_sms2enable_mode(int mode)
601 static int stm32_get_enable_mode(struct iio_dev *indio_dev,
602 const struct iio_chan_spec *chan)
604 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
607 regmap_read(priv->regmap, TIM_SMCR, &smcr);
608 smcr &= TIM_SMCR_SMS;
610 return stm32_sms2enable_mode(smcr);
613 static const struct iio_enum stm32_enable_mode_enum = {
614 .items = stm32_enable_modes,
615 .num_items = ARRAY_SIZE(stm32_enable_modes),
616 .set = stm32_set_enable_mode,
617 .get = stm32_get_enable_mode
620 static const char *const stm32_quadrature_modes[] = {
626 static int stm32_set_quadrature_mode(struct iio_dev *indio_dev,
627 const struct iio_chan_spec *chan,
630 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
632 regmap_update_bits(priv->regmap, TIM_SMCR, TIM_SMCR_SMS, mode + 1);
637 static int stm32_get_quadrature_mode(struct iio_dev *indio_dev,
638 const struct iio_chan_spec *chan)
640 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
644 regmap_read(priv->regmap, TIM_SMCR, &smcr);
645 mode = (smcr & TIM_SMCR_SMS) - 1;
646 if ((mode < 0) || (mode > ARRAY_SIZE(stm32_quadrature_modes)))
652 static const struct iio_enum stm32_quadrature_mode_enum = {
653 .items = stm32_quadrature_modes,
654 .num_items = ARRAY_SIZE(stm32_quadrature_modes),
655 .set = stm32_set_quadrature_mode,
656 .get = stm32_get_quadrature_mode
659 static const char *const stm32_count_direction_states[] = {
664 static int stm32_set_count_direction(struct iio_dev *indio_dev,
665 const struct iio_chan_spec *chan,
668 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
672 /* In encoder mode, direction is RO (given by TI1/TI2 signals) */
673 regmap_read(priv->regmap, TIM_SMCR, &val);
674 mode = (val & TIM_SMCR_SMS) - 1;
675 if ((mode >= 0) || (mode < ARRAY_SIZE(stm32_quadrature_modes)))
678 return regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_DIR,
679 dir ? TIM_CR1_DIR : 0);
682 static int stm32_get_count_direction(struct iio_dev *indio_dev,
683 const struct iio_chan_spec *chan)
685 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
688 regmap_read(priv->regmap, TIM_CR1, &cr1);
690 return ((cr1 & TIM_CR1_DIR) ? 1 : 0);
693 static const struct iio_enum stm32_count_direction_enum = {
694 .items = stm32_count_direction_states,
695 .num_items = ARRAY_SIZE(stm32_count_direction_states),
696 .set = stm32_set_count_direction,
697 .get = stm32_get_count_direction
700 static ssize_t stm32_count_get_preset(struct iio_dev *indio_dev,
702 const struct iio_chan_spec *chan,
705 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
708 regmap_read(priv->regmap, TIM_ARR, &arr);
710 return snprintf(buf, PAGE_SIZE, "%u\n", arr);
713 static ssize_t stm32_count_set_preset(struct iio_dev *indio_dev,
715 const struct iio_chan_spec *chan,
716 const char *buf, size_t len)
718 struct stm32_timer_trigger *priv = iio_priv(indio_dev);
722 ret = kstrtouint(buf, 0, &preset);
726 /* TIMx_ARR register shouldn't be buffered (ARPE=0) */
727 regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0);
728 regmap_write(priv->regmap, TIM_ARR, preset);
733 static const struct iio_chan_spec_ext_info stm32_trigger_count_info[] = {
736 .shared = IIO_SEPARATE,
737 .read = stm32_count_get_preset,
738 .write = stm32_count_set_preset
740 IIO_ENUM("count_direction", IIO_SEPARATE, &stm32_count_direction_enum),
741 IIO_ENUM_AVAILABLE("count_direction", &stm32_count_direction_enum),
742 IIO_ENUM("quadrature_mode", IIO_SEPARATE, &stm32_quadrature_mode_enum),
743 IIO_ENUM_AVAILABLE("quadrature_mode", &stm32_quadrature_mode_enum),
744 IIO_ENUM("enable_mode", IIO_SEPARATE, &stm32_enable_mode_enum),
745 IIO_ENUM_AVAILABLE("enable_mode", &stm32_enable_mode_enum),
746 IIO_ENUM("trigger_mode", IIO_SEPARATE, &stm32_trigger_mode_enum),
747 IIO_ENUM_AVAILABLE("trigger_mode", &stm32_trigger_mode_enum),
751 static const struct iio_chan_spec stm32_trigger_channel = {
754 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
755 BIT(IIO_CHAN_INFO_ENABLE) |
756 BIT(IIO_CHAN_INFO_SCALE),
757 .ext_info = stm32_trigger_count_info,
761 static struct stm32_timer_trigger *stm32_setup_counter_device(struct device *dev)
763 struct iio_dev *indio_dev;
766 indio_dev = devm_iio_device_alloc(dev,
767 sizeof(struct stm32_timer_trigger));
771 indio_dev->name = dev_name(dev);
772 indio_dev->dev.parent = dev;
773 indio_dev->info = &stm32_trigger_info;
774 indio_dev->modes = INDIO_HARDWARE_TRIGGERED;
775 indio_dev->num_channels = 1;
776 indio_dev->channels = &stm32_trigger_channel;
777 indio_dev->dev.of_node = dev->of_node;
779 ret = devm_iio_device_register(dev, indio_dev);
783 return iio_priv(indio_dev);
787 * is_stm32_timer_trigger
788 * @trig: trigger to be checked
790 * return true if the trigger is a valid stm32 iio timer trigger
791 * either return false
793 bool is_stm32_timer_trigger(struct iio_trigger *trig)
795 return (trig->ops == &timer_trigger_ops);
797 EXPORT_SYMBOL(is_stm32_timer_trigger);
799 static void stm32_timer_detect_trgo2(struct stm32_timer_trigger *priv)
804 * Master mode selection 2 bits can only be written and read back when
807 regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2, TIM_CR2_MMS2);
808 regmap_read(priv->regmap, TIM_CR2, &val);
809 regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2, 0);
810 priv->has_trgo2 = !!val;
813 static int stm32_timer_trigger_probe(struct platform_device *pdev)
815 struct device *dev = &pdev->dev;
816 struct stm32_timer_trigger *priv;
817 struct stm32_timers *ddata = dev_get_drvdata(pdev->dev.parent);
818 const struct stm32_timer_trigger_cfg *cfg;
822 if (of_property_read_u32(dev->of_node, "reg", &index))
825 cfg = (const struct stm32_timer_trigger_cfg *)
826 of_match_device(dev->driver->of_match_table, dev)->data;
828 if (index >= ARRAY_SIZE(triggers_table) ||
829 index >= cfg->num_valids_table)
832 /* Create an IIO device only if we have triggers to be validated */
833 if (*cfg->valids_table[index])
834 priv = stm32_setup_counter_device(dev);
836 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
842 priv->regmap = ddata->regmap;
843 priv->clk = ddata->clk;
844 priv->max_arr = ddata->max_arr;
845 priv->triggers = triggers_table[index];
846 priv->valids = cfg->valids_table[index];
847 stm32_timer_detect_trgo2(priv);
849 ret = stm32_setup_iio_triggers(priv);
853 platform_set_drvdata(pdev, priv);
858 static const struct stm32_timer_trigger_cfg stm32_timer_trg_cfg = {
859 .valids_table = valids_table,
860 .num_valids_table = ARRAY_SIZE(valids_table),
863 static const struct stm32_timer_trigger_cfg stm32h7_timer_trg_cfg = {
864 .valids_table = stm32h7_valids_table,
865 .num_valids_table = ARRAY_SIZE(stm32h7_valids_table),
868 static const struct of_device_id stm32_trig_of_match[] = {
870 .compatible = "st,stm32-timer-trigger",
871 .data = (void *)&stm32_timer_trg_cfg,
873 .compatible = "st,stm32h7-timer-trigger",
874 .data = (void *)&stm32h7_timer_trg_cfg,
878 MODULE_DEVICE_TABLE(of, stm32_trig_of_match);
880 static struct platform_driver stm32_timer_trigger_driver = {
881 .probe = stm32_timer_trigger_probe,
883 .name = "stm32-timer-trigger",
884 .of_match_table = stm32_trig_of_match,
887 module_platform_driver(stm32_timer_trigger_driver);
889 MODULE_ALIAS("platform: stm32-timer-trigger");
890 MODULE_DESCRIPTION("STMicroelectronics STM32 Timer Trigger driver");
891 MODULE_LICENSE("GPL v2");