61 	struct pwm_sifive_ddata *ddata = pwm_sifive_chip_to_ddata(chip);  in pwm_sifive_request()  local
63 	mutex_lock(&ddata->lock);  in pwm_sifive_request()
64 	ddata->user_count++;  in pwm_sifive_request()
65 	mutex_unlock(&ddata->lock);  in pwm_sifive_request()
72 	struct pwm_sifive_ddata *ddata = pwm_sifive_chip_to_ddata(chip);  in pwm_sifive_free()  local
74 	mutex_lock(&ddata->lock);  in pwm_sifive_free()
75 	ddata->user_count--;  in pwm_sifive_free()
76 	mutex_unlock(&ddata->lock);  in pwm_sifive_free()
80 static void pwm_sifive_update_clock(struct pwm_sifive_ddata *ddata,  in pwm_sifive_update_clock()  argument
94 	scale_pow = div64_ul(ddata->approx_period * (u64)rate, NSEC_PER_SEC);  in pwm_sifive_update_clock()
99 	writel(val, ddata->regs + PWM_SIFIVE_PWMCFG);  in pwm_sifive_update_clock()
103 	ddata->real_period = div64_ul(num, rate);  in pwm_sifive_update_clock()
104 	dev_dbg(ddata->chip.dev,  in pwm_sifive_update_clock()
105 		"New real_period = %u ns\n", ddata->real_period);  in pwm_sifive_update_clock()
111 	struct pwm_sifive_ddata *ddata = pwm_sifive_chip_to_ddata(chip);  in pwm_sifive_get_state()  local
114 	duty = readl(ddata->regs + PWM_SIFIVE_PWMCMP(pwm->hwpwm));  in pwm_sifive_get_state()
118 	val = readl(ddata->regs + PWM_SIFIVE_PWMCFG);  in pwm_sifive_get_state()
122 	state->period = ddata->real_period;  in pwm_sifive_get_state()
124 		(u64)duty * ddata->real_period >> PWM_SIFIVE_CMPWIDTH;  in pwm_sifive_get_state()
131 	struct pwm_sifive_ddata *ddata = pwm_sifive_chip_to_ddata(chip);  in pwm_sifive_apply()  local
160 	mutex_lock(&ddata->lock);  in pwm_sifive_apply()
161 	if (state->period != ddata->approx_period) {  in pwm_sifive_apply()
162 		if (ddata->user_count != 1) {  in pwm_sifive_apply()
163 			mutex_unlock(&ddata->lock);  in pwm_sifive_apply()
166 		ddata->approx_period = state->period;  in pwm_sifive_apply()
167 		pwm_sifive_update_clock(ddata, clk_get_rate(ddata->clk));  in pwm_sifive_apply()
169 	mutex_unlock(&ddata->lock);  in pwm_sifive_apply()
177 		ret = clk_enable(ddata->clk);  in pwm_sifive_apply()
179 			dev_err(ddata->chip.dev, "Enable clk failed\n");  in pwm_sifive_apply()
184 	writel(frac, ddata->regs + PWM_SIFIVE_PWMCMP(pwm->hwpwm));  in pwm_sifive_apply()
187 		clk_disable(ddata->clk);  in pwm_sifive_apply()
204 	struct pwm_sifive_ddata *ddata =  in pwm_sifive_clock_notifier()  local
208 		mutex_lock(&ddata->lock);  in pwm_sifive_clock_notifier()
209 		pwm_sifive_update_clock(ddata, ndata->new_rate);  in pwm_sifive_clock_notifier()
210 		mutex_unlock(&ddata->lock);  in pwm_sifive_clock_notifier()
219 	struct pwm_sifive_ddata *ddata;  in pwm_sifive_probe()  local
225 	ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);  in pwm_sifive_probe()
226 	if (!ddata)  in pwm_sifive_probe()
229 	mutex_init(&ddata->lock);  in pwm_sifive_probe()
230 	chip = &ddata->chip;  in pwm_sifive_probe()
235 	ddata->regs = devm_platform_ioremap_resource(pdev, 0);  in pwm_sifive_probe()
236 	if (IS_ERR(ddata->regs))  in pwm_sifive_probe()
237 		return PTR_ERR(ddata->regs);  in pwm_sifive_probe()
239 	ddata->clk = devm_clk_get(dev, NULL);  in pwm_sifive_probe()
240 	if (IS_ERR(ddata->clk))  in pwm_sifive_probe()
241 		return dev_err_probe(dev, PTR_ERR(ddata->clk),  in pwm_sifive_probe()
244 	ret = clk_prepare_enable(ddata->clk);  in pwm_sifive_probe()
250 	val = readl(ddata->regs + PWM_SIFIVE_PWMCFG);  in pwm_sifive_probe()
255 			val = readl(ddata->regs + PWM_SIFIVE_PWMCMP(i));  in pwm_sifive_probe()
265 			ret = clk_enable(ddata->clk);  in pwm_sifive_probe()
273 		clk_disable(ddata->clk);  in pwm_sifive_probe()
278 	ddata->notifier.notifier_call = pwm_sifive_clock_notifier;  in pwm_sifive_probe()
279 	ret = clk_notifier_register(ddata->clk, &ddata->notifier);  in pwm_sifive_probe()
291 	platform_set_drvdata(pdev, ddata);  in pwm_sifive_probe()
297 	clk_notifier_unregister(ddata->clk, &ddata->notifier);  in pwm_sifive_probe()
300 		clk_disable(ddata->clk);  in pwm_sifive_probe()
303 	clk_unprepare(ddata->clk);  in pwm_sifive_probe()
310 	struct pwm_sifive_ddata *ddata = platform_get_drvdata(dev);  in pwm_sifive_remove()  local
314 	pwmchip_remove(&ddata->chip);  in pwm_sifive_remove()
315 	clk_notifier_unregister(ddata->clk, &ddata->notifier);  in pwm_sifive_remove()
317 	for (ch = 0; ch < ddata->chip.npwm; ch++) {  in pwm_sifive_remove()
318 		pwm = &ddata->chip.pwms[ch];  in pwm_sifive_remove()
320 			clk_disable(ddata->clk);  in pwm_sifive_remove()
323 	clk_unprepare(ddata->clk);  in pwm_sifive_remove()