86 	void (*update_mbus_timing)(struct armada38x_rtc *rtc);
87 	u32 (*read_rtc_reg)(struct armada38x_rtc *rtc, u8 rtc_reg);
88 	void (*clear_isr)(struct armada38x_rtc *rtc);
89 	void (*unmask_interrupt)(struct armada38x_rtc *rtc);
103 static void rtc_delayed_write(u32 val, struct armada38x_rtc *rtc, int offset)  in rtc_delayed_write()  argument
105 	writel(0, rtc->regs + RTC_STATUS);  in rtc_delayed_write()
106 	writel(0, rtc->regs + RTC_STATUS);  in rtc_delayed_write()
107 	writel(val, rtc->regs + offset);  in rtc_delayed_write()
112 static void rtc_update_38x_mbus_timing_params(struct armada38x_rtc *rtc)  in rtc_update_38x_mbus_timing_params()  argument
116 	reg = readl(rtc->regs_soc + RTC_38X_BRIDGE_TIMING_CTL);  in rtc_update_38x_mbus_timing_params()
121 	writel(reg, rtc->regs_soc + RTC_38X_BRIDGE_TIMING_CTL);  in rtc_update_38x_mbus_timing_params()
124 static void rtc_update_8k_mbus_timing_params(struct armada38x_rtc *rtc)  in rtc_update_8k_mbus_timing_params()  argument
128 	reg = readl(rtc->regs_soc + RTC_8K_BRIDGE_TIMING_CTL0);  in rtc_update_8k_mbus_timing_params()
133 	writel(reg, rtc->regs_soc + RTC_8K_BRIDGE_TIMING_CTL0);  in rtc_update_8k_mbus_timing_params()
135 	reg = readl(rtc->regs_soc + RTC_8K_BRIDGE_TIMING_CTL1);  in rtc_update_8k_mbus_timing_params()
138 	writel(reg, rtc->regs_soc + RTC_8K_BRIDGE_TIMING_CTL1);  in rtc_update_8k_mbus_timing_params()
141 static u32 read_rtc_register(struct armada38x_rtc *rtc, u8 rtc_reg)  in read_rtc_register()  argument
143 	return readl(rtc->regs + rtc_reg);  in read_rtc_register()
146 static u32 read_rtc_register_38x_wa(struct armada38x_rtc *rtc, u8 rtc_reg)  in read_rtc_register_38x_wa()  argument
151 		rtc->val_to_freq[i].value = readl(rtc->regs + rtc_reg);  in read_rtc_register_38x_wa()
152 		rtc->val_to_freq[i].freq = 0;  in read_rtc_register_38x_wa()
157 		u32 value = rtc->val_to_freq[i].value;  in read_rtc_register_38x_wa()
159 		while (rtc->val_to_freq[j].freq) {  in read_rtc_register_38x_wa()
160 			if (rtc->val_to_freq[j].value == value) {  in read_rtc_register_38x_wa()
161 				rtc->val_to_freq[j].freq++;  in read_rtc_register_38x_wa()
167 		if (!rtc->val_to_freq[j].freq) {  in read_rtc_register_38x_wa()
168 			rtc->val_to_freq[j].value = value;  in read_rtc_register_38x_wa()
169 			rtc->val_to_freq[j].freq = 1;  in read_rtc_register_38x_wa()
172 		if (rtc->val_to_freq[j].freq > max) {  in read_rtc_register_38x_wa()
174 			max = rtc->val_to_freq[j].freq;  in read_rtc_register_38x_wa()
185 	return rtc->val_to_freq[index_max].value;  in read_rtc_register_38x_wa()
188 static void armada38x_clear_isr(struct armada38x_rtc *rtc)  in armada38x_clear_isr()  argument
190 	u32 val = readl(rtc->regs_soc + SOC_RTC_INTERRUPT);  in armada38x_clear_isr()
192 	writel(val & ~SOC_RTC_ALARM1, rtc->regs_soc + SOC_RTC_INTERRUPT);  in armada38x_clear_isr()
195 static void armada38x_unmask_interrupt(struct armada38x_rtc *rtc)  in armada38x_unmask_interrupt()  argument
197 	u32 val = readl(rtc->regs_soc + SOC_RTC_INTERRUPT);  in armada38x_unmask_interrupt()
199 	writel(val | SOC_RTC_ALARM1_MASK, rtc->regs_soc + SOC_RTC_INTERRUPT);  in armada38x_unmask_interrupt()
202 static void armada8k_clear_isr(struct armada38x_rtc *rtc)  in armada8k_clear_isr()  argument
204 	writel(RTC_8K_ALARM2, rtc->regs_soc + RTC_8K_ISR);  in armada8k_clear_isr()
207 static void armada8k_unmask_interrupt(struct armada38x_rtc *rtc)  in armada8k_unmask_interrupt()  argument
209 	writel(RTC_8K_ALARM2, rtc->regs_soc + RTC_8K_IMR);  in armada8k_unmask_interrupt()
214 	struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_read_time()  local
217 	spin_lock_irqsave(&rtc->lock, flags);  in armada38x_rtc_read_time()
218 	time = rtc->data->read_rtc_reg(rtc, RTC_TIME);  in armada38x_rtc_read_time()
219 	spin_unlock_irqrestore(&rtc->lock, flags);  in armada38x_rtc_read_time()
226 static void armada38x_rtc_reset(struct armada38x_rtc *rtc)  in armada38x_rtc_reset()  argument
230 	reg = rtc->data->read_rtc_reg(rtc, RTC_CONF_TEST);  in armada38x_rtc_reset()
233 		rtc_delayed_write(0, rtc, RTC_CONF_TEST);  in armada38x_rtc_reset()
235 		rtc_delayed_write(0, rtc, RTC_TIME);  in armada38x_rtc_reset()
236 		rtc_delayed_write(SOC_RTC_ALARM1 | SOC_RTC_ALARM2, rtc,  in armada38x_rtc_reset()
238 		rtc_delayed_write(RTC_NOMINAL_TIMING, rtc, RTC_CCR);  in armada38x_rtc_reset()
240 	rtc->initialized = true;  in armada38x_rtc_reset()
245 	struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_set_time()  local
250 	if (!rtc->initialized)  in armada38x_rtc_set_time()
251 		armada38x_rtc_reset(rtc);  in armada38x_rtc_set_time()
253 	spin_lock_irqsave(&rtc->lock, flags);  in armada38x_rtc_set_time()
254 	rtc_delayed_write(time, rtc, RTC_TIME);  in armada38x_rtc_set_time()
255 	spin_unlock_irqrestore(&rtc->lock, flags);  in armada38x_rtc_set_time()
262 	struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_read_alarm()  local
264 	u32 reg = ALARM_REG(RTC_ALARM1, rtc->data->alarm);  in armada38x_rtc_read_alarm()
265 	u32 reg_irq = ALARM_REG(RTC_IRQ1_CONF, rtc->data->alarm);  in armada38x_rtc_read_alarm()
268 	spin_lock_irqsave(&rtc->lock, flags);  in armada38x_rtc_read_alarm()
270 	time = rtc->data->read_rtc_reg(rtc, reg);  in armada38x_rtc_read_alarm()
271 	val = rtc->data->read_rtc_reg(rtc, reg_irq) & RTC_IRQ_AL_EN;  in armada38x_rtc_read_alarm()
273 	spin_unlock_irqrestore(&rtc->lock, flags);  in armada38x_rtc_read_alarm()
283 	struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_set_alarm()  local
284 	u32 reg = ALARM_REG(RTC_ALARM1, rtc->data->alarm);  in armada38x_rtc_set_alarm()
285 	u32 reg_irq = ALARM_REG(RTC_IRQ1_CONF, rtc->data->alarm);  in armada38x_rtc_set_alarm()
290 	spin_lock_irqsave(&rtc->lock, flags);  in armada38x_rtc_set_alarm()
292 	rtc_delayed_write(time, rtc, reg);  in armada38x_rtc_set_alarm()
295 		rtc_delayed_write(RTC_IRQ_AL_EN, rtc, reg_irq);  in armada38x_rtc_set_alarm()
296 		rtc->data->unmask_interrupt(rtc);  in armada38x_rtc_set_alarm()
299 	spin_unlock_irqrestore(&rtc->lock, flags);  in armada38x_rtc_set_alarm()
307 	struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_alarm_irq_enable()  local
308 	u32 reg_irq = ALARM_REG(RTC_IRQ1_CONF, rtc->data->alarm);  in armada38x_rtc_alarm_irq_enable()
311 	spin_lock_irqsave(&rtc->lock, flags);  in armada38x_rtc_alarm_irq_enable()
314 		rtc_delayed_write(RTC_IRQ_AL_EN, rtc, reg_irq);  in armada38x_rtc_alarm_irq_enable()
316 		rtc_delayed_write(0, rtc, reg_irq);  in armada38x_rtc_alarm_irq_enable()
318 	spin_unlock_irqrestore(&rtc->lock, flags);  in armada38x_rtc_alarm_irq_enable()
325 	struct armada38x_rtc *rtc = data;  in armada38x_rtc_alarm_irq()  local
328 	u32 reg_irq = ALARM_REG(RTC_IRQ1_CONF, rtc->data->alarm);  in armada38x_rtc_alarm_irq()
330 	dev_dbg(&rtc->rtc_dev->dev, "%s:irq(%d)\n", __func__, irq);  in armada38x_rtc_alarm_irq()
332 	spin_lock(&rtc->lock);  in armada38x_rtc_alarm_irq()
334 	rtc->data->clear_isr(rtc);  in armada38x_rtc_alarm_irq()
335 	val = rtc->data->read_rtc_reg(rtc, reg_irq);  in armada38x_rtc_alarm_irq()
337 	rtc_delayed_write(0, rtc, reg_irq);  in armada38x_rtc_alarm_irq()
339 	rtc_delayed_write(1 << rtc->data->alarm, rtc, RTC_STATUS);  in armada38x_rtc_alarm_irq()
341 	spin_unlock(&rtc->lock);  in armada38x_rtc_alarm_irq()
350 	rtc_update_irq(rtc->rtc_dev, 1, event);  in armada38x_rtc_alarm_irq()
399 	struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_read_offset()  local
403 	spin_lock_irqsave(&rtc->lock, flags);  in armada38x_rtc_read_offset()
404 	ccr = rtc->data->read_rtc_reg(rtc, RTC_CCR);  in armada38x_rtc_read_offset()
405 	spin_unlock_irqrestore(&rtc->lock, flags);  in armada38x_rtc_read_offset()
416 	struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_set_offset()  local
445 	rtc_delayed_write(ccr, rtc, RTC_CCR);  in armada38x_rtc_set_offset()
491 	struct armada38x_rtc *rtc;  in armada38x_rtc_probe()  local
493 	rtc = devm_kzalloc(&pdev->dev, sizeof(struct armada38x_rtc),  in armada38x_rtc_probe()
495 	if (!rtc)  in armada38x_rtc_probe()
498 	rtc->data = of_device_get_match_data(&pdev->dev);  in armada38x_rtc_probe()
500 	rtc->val_to_freq = devm_kcalloc(&pdev->dev, SAMPLE_NR,  in armada38x_rtc_probe()
502 	if (!rtc->val_to_freq)  in armada38x_rtc_probe()
505 	spin_lock_init(&rtc->lock);  in armada38x_rtc_probe()
507 	rtc->regs = devm_platform_ioremap_resource_byname(pdev, "rtc");  in armada38x_rtc_probe()
508 	if (IS_ERR(rtc->regs))  in armada38x_rtc_probe()
509 		return PTR_ERR(rtc->regs);  in armada38x_rtc_probe()
510 	rtc->regs_soc = devm_platform_ioremap_resource_byname(pdev, "rtc-soc");  in armada38x_rtc_probe()
511 	if (IS_ERR(rtc->regs_soc))  in armada38x_rtc_probe()
512 		return PTR_ERR(rtc->regs_soc);  in armada38x_rtc_probe()
514 	rtc->irq = platform_get_irq(pdev, 0);  in armada38x_rtc_probe()
515 	if (rtc->irq < 0)  in armada38x_rtc_probe()
516 		return rtc->irq;  in armada38x_rtc_probe()
518 	rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);  in armada38x_rtc_probe()
519 	if (IS_ERR(rtc->rtc_dev))  in armada38x_rtc_probe()
520 		return PTR_ERR(rtc->rtc_dev);  in armada38x_rtc_probe()
522 	if (devm_request_irq(&pdev->dev, rtc->irq, armada38x_rtc_alarm_irq,  in armada38x_rtc_probe()
523 				0, pdev->name, rtc) < 0) {  in armada38x_rtc_probe()
525 		rtc->irq = -1;  in armada38x_rtc_probe()
527 	platform_set_drvdata(pdev, rtc);  in armada38x_rtc_probe()
529 	if (rtc->irq != -1)  in armada38x_rtc_probe()
532 		clear_bit(RTC_FEATURE_ALARM, rtc->rtc_dev->features);  in armada38x_rtc_probe()
535 	rtc->data->update_mbus_timing(rtc);  in armada38x_rtc_probe()
537 	rtc->rtc_dev->ops = &armada38x_rtc_ops;  in armada38x_rtc_probe()
538 	rtc->rtc_dev->range_max = U32_MAX;  in armada38x_rtc_probe()
540 	return devm_rtc_register_device(rtc->rtc_dev);  in armada38x_rtc_probe()
547 		struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_suspend()  local
549 		return enable_irq_wake(rtc->irq);  in armada38x_rtc_suspend()
558 		struct armada38x_rtc *rtc = dev_get_drvdata(dev);  in armada38x_rtc_resume()  local
561 		rtc->data->update_mbus_timing(rtc);  in armada38x_rtc_resume()
563 		return disable_irq_wake(rtc->irq);  in armada38x_rtc_resume()