Lines Matching refs:pc

123 static int sti_pwm_get_prescale(struct sti_pwm_chip *pc, unsigned long period,
126 	struct sti_pwm_compat_data *cdata = pc->cdata;
131 	clk_rate = clk_get_rate(pc->pwm_clk);
133 		dev_err(pc->dev, "failed to get clock rate\n");
167 	struct sti_pwm_chip *pc = to_sti_pwmchip(chip);
168 	struct sti_pwm_compat_data *cdata = pc->cdata;
170 	struct pwm_device *cur = pc->cur;
171 	struct device *dev = pc->dev;
175 	ncfg = hweight_long(pc->configured);
196 		ret = clk_enable(pc->pwm_clk);
200 		ret = clk_enable(pc->cpt_clk);
205 			ret = sti_pwm_get_prescale(pc, period_ns, &prescale);
211 			ret = regmap_field_write(pc->prescale_low, value);
217 			ret = regmap_field_write(pc->prescale_high, value);
230 		ret = regmap_write(pc->regmap, PWM_OUT_VAL(pwm->hwpwm), value);
234 		ret = regmap_field_write(pc->pwm_cpt_int_en, 0);
236 		set_bit(pwm->hwpwm, &pc->configured);
237 		pc->cur = pwm;
246 	clk_disable(pc->pwm_clk);
247 	clk_disable(pc->cpt_clk);
253 	struct sti_pwm_chip *pc = to_sti_pwmchip(chip);
254 	struct device *dev = pc->dev;
261 	mutex_lock(&pc->sti_pwm_lock);
263 	if (!pc->en_count) {
264 		ret = clk_enable(pc->pwm_clk);
268 		ret = clk_enable(pc->cpt_clk);
272 		ret = regmap_field_write(pc->pwm_out_en, 1);
280 	pc->en_count++;
283 	mutex_unlock(&pc->sti_pwm_lock);
289 	struct sti_pwm_chip *pc = to_sti_pwmchip(chip);
291 	mutex_lock(&pc->sti_pwm_lock);
293 	if (--pc->en_count) {
294 		mutex_unlock(&pc->sti_pwm_lock);
298 	regmap_field_write(pc->pwm_out_en, 0);
300 	clk_disable(pc->pwm_clk);
301 	clk_disable(pc->cpt_clk);
303 	mutex_unlock(&pc->sti_pwm_lock);
308 	struct sti_pwm_chip *pc = to_sti_pwmchip(chip);
310 	clear_bit(pwm->hwpwm, &pc->configured);
316 	struct sti_pwm_chip *pc = to_sti_pwmchip(chip);
317 	struct sti_pwm_compat_data *cdata = pc->cdata;
319 	struct device *dev = pc->dev;
333 	regmap_write(pc->regmap, PWM_CPT_EDGE(pwm->hwpwm), CPT_EDGE_RISING);
334 	regmap_field_write(pc->pwm_cpt_int_en, BIT(pwm->hwpwm));
337 	ret = regmap_field_write(pc->pwm_cpt_en, 1);
347 	regmap_write(pc->regmap, PWM_CPT_EDGE(pwm->hwpwm), CPT_EDGE_DISABLED);
372 		effective_ticks = clk_get_rate(pc->cpt_clk);
389 	regmap_field_write(pc->pwm_cpt_en, 0);
406 	struct sti_pwm_chip *pc = data;
407 	struct device *dev = pc->dev;
414 	ret = regmap_field_read(pc->pwm_cpt_int_stat, &cpt_int_stat);
421 		ddata = &pc->cdata->ddata[devicenum];
439 		regmap_read(pc->regmap,
446 			regmap_read(pc->regmap, PWM_CPT_EDGE(devicenum), &reg);
448 			regmap_write(pc->regmap, PWM_CPT_EDGE(devicenum), reg);
454 			regmap_write(pc->regmap,
470 	regmap_write(pc->regmap, PWM_INT_ACK, PWM_INT_ACK_MASK);
475 static int sti_pwm_probe_dt(struct sti_pwm_chip *pc)
477 	struct device *dev = pc->dev;
480 	struct sti_pwm_compat_data *cdata = pc->cdata;
499 	pc->prescale_low = devm_regmap_field_alloc(dev, pc->regmap,
501 	if (IS_ERR(pc->prescale_low))
502 		return PTR_ERR(pc->prescale_low);
504 	pc->prescale_high = devm_regmap_field_alloc(dev, pc->regmap,
506 	if (IS_ERR(pc->prescale_high))
507 		return PTR_ERR(pc->prescale_high);
510 	pc->pwm_out_en = devm_regmap_field_alloc(dev, pc->regmap,
512 	if (IS_ERR(pc->pwm_out_en))
513 		return PTR_ERR(pc->pwm_out_en);
515 	pc->pwm_cpt_en = devm_regmap_field_alloc(dev, pc->regmap,
517 	if (IS_ERR(pc->pwm_cpt_en))
518 		return PTR_ERR(pc->pwm_cpt_en);
520 	pc->pwm_cpt_int_en = devm_regmap_field_alloc(dev, pc->regmap,
522 	if (IS_ERR(pc->pwm_cpt_int_en))
523 		return PTR_ERR(pc->pwm_cpt_int_en);
525 	pc->pwm_cpt_int_stat = devm_regmap_field_alloc(dev, pc->regmap,
527 	if (PTR_ERR_OR_ZERO(pc->pwm_cpt_int_stat))
528 		return PTR_ERR(pc->pwm_cpt_int_stat);
543 	struct sti_pwm_chip *pc;
548 	pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
549 	if (!pc)
558 	pc->mmio = devm_ioremap_resource(dev, res);
559 	if (IS_ERR(pc->mmio))
560 		return PTR_ERR(pc->mmio);
562 	pc->regmap = devm_regmap_init_mmio(dev, pc->mmio,
564 	if (IS_ERR(pc->regmap))
565 		return PTR_ERR(pc->regmap);
572 			       pdev->name, pc);
588 	pc->cdata = cdata;
589 	pc->dev = dev;
590 	pc->en_count = 0;
591 	mutex_init(&pc->sti_pwm_lock);
593 	ret = sti_pwm_probe_dt(pc);
598 		pc->pwm_clk = of_clk_get_by_name(dev->of_node, "pwm");
599 		if (IS_ERR(pc->pwm_clk)) {
601 			return PTR_ERR(pc->pwm_clk);
604 		ret = clk_prepare(pc->pwm_clk);
612 		pc->cpt_clk = of_clk_get_by_name(dev->of_node, "capture");
613 		if (IS_ERR(pc->cpt_clk)) {
615 			return PTR_ERR(pc->cpt_clk);
618 		ret = clk_prepare(pc->cpt_clk);
629 	pc->chip.dev = dev;
630 	pc->chip.ops = &sti_pwm_ops;
631 	pc->chip.base = -1;
632 	pc->chip.npwm = pc->cdata->pwm_num_devs;
641 	ret = pwmchip_add(&pc->chip);
643 		clk_unprepare(pc->pwm_clk);
644 		clk_unprepare(pc->cpt_clk);
648 	platform_set_drvdata(pdev, pc);
655 	struct sti_pwm_chip *pc = platform_get_drvdata(pdev);
658 	for (i = 0; i < pc->cdata->pwm_num_devs; i++)
659 		pwm_disable(&pc->chip.pwms[i]);
661 	clk_unprepare(pc->pwm_clk);
662 	clk_unprepare(pc->cpt_clk);
664 	return pwmchip_remove(&pc->chip);