44 static u64 rtc_read_lpsrt(struct snvs_rtc_data *data)  in rtc_read_lpsrt()  argument
48 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &msb);  in rtc_read_lpsrt()
49 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &lsb);  in rtc_read_lpsrt()
56 static u32 rtc_read_lp_counter(struct snvs_rtc_data *data)  in rtc_read_lp_counter()  argument
65 	read1 = rtc_read_lpsrt(data);  in rtc_read_lp_counter()
68 		read1 = rtc_read_lpsrt(data);  in rtc_read_lp_counter()
71 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");  in rtc_read_lp_counter()
78 static int rtc_read_lp_counter_lsb(struct snvs_rtc_data *data, u32 *lsb)  in rtc_read_lp_counter_lsb()  argument
83 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);  in rtc_read_lp_counter_lsb()
86 		regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);  in rtc_read_lp_counter_lsb()
89 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");  in rtc_read_lp_counter_lsb()
97 static int rtc_write_sync_lp(struct snvs_rtc_data *data)  in rtc_write_sync_lp()  argument
104 	ret = rtc_read_lp_counter_lsb(data, &count1);  in rtc_write_sync_lp()
110 		ret = rtc_read_lp_counter_lsb(data, &count2);  in rtc_write_sync_lp()
116 		dev_err(&data->rtc->dev, "Timeout waiting for LPSRT Counter to change\n");  in rtc_write_sync_lp()
122 static int snvs_rtc_enable(struct snvs_rtc_data *data, bool enable)  in snvs_rtc_enable()  argument
127 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_SRTC_ENV,  in snvs_rtc_enable()
131 		regmap_read(data->regmap, data->offset + SNVS_LPCR, &lpcr);  in snvs_rtc_enable()
150 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_read_time()  local
154 	ret = clk_enable(data->clk);  in snvs_rtc_read_time()
158 	time = rtc_read_lp_counter(data);  in snvs_rtc_read_time()
161 	clk_disable(data->clk);  in snvs_rtc_read_time()
168 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_set_time()  local
172 	ret = clk_enable(data->clk);  in snvs_rtc_set_time()
177 	ret = snvs_rtc_enable(data, false);  in snvs_rtc_set_time()
182 	regmap_write(data->regmap, data->offset + SNVS_LPSRTCLR, time << CNTR_TO_SECS_SH);  in snvs_rtc_set_time()
183 	regmap_write(data->regmap, data->offset + SNVS_LPSRTCMR, time >> (32 - CNTR_TO_SECS_SH));  in snvs_rtc_set_time()
186 	ret = snvs_rtc_enable(data, true);  in snvs_rtc_set_time()
188 	clk_disable(data->clk);  in snvs_rtc_set_time()
195 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_read_alarm()  local
199 	ret = clk_enable(data->clk);  in snvs_rtc_read_alarm()
203 	regmap_read(data->regmap, data->offset + SNVS_LPTAR, &lptar);  in snvs_rtc_read_alarm()
206 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);  in snvs_rtc_read_alarm()
209 	clk_disable(data->clk);  in snvs_rtc_read_alarm()
216 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_alarm_irq_enable()  local
219 	ret = clk_enable(data->clk);  in snvs_rtc_alarm_irq_enable()
223 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR,  in snvs_rtc_alarm_irq_enable()
227 	ret = rtc_write_sync_lp(data);  in snvs_rtc_alarm_irq_enable()
229 	clk_disable(data->clk);  in snvs_rtc_alarm_irq_enable()
236 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_set_alarm()  local
240 	ret = clk_enable(data->clk);  in snvs_rtc_set_alarm()
244 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_LPTA_EN, 0);  in snvs_rtc_set_alarm()
245 	ret = rtc_write_sync_lp(data);  in snvs_rtc_set_alarm()
248 	regmap_write(data->regmap, data->offset + SNVS_LPTAR, time);  in snvs_rtc_set_alarm()
251 	regmap_write(data->regmap, data->offset + SNVS_LPSR, SNVS_LPSR_LPTA);  in snvs_rtc_set_alarm()
253 	clk_disable(data->clk);  in snvs_rtc_set_alarm()
269 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_irq_handler()  local
273 	clk_enable(data->clk);  in snvs_rtc_irq_handler()
275 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);  in snvs_rtc_irq_handler()
283 		rtc_update_irq(data->rtc, 1, events);  in snvs_rtc_irq_handler()
287 	regmap_write(data->regmap, data->offset + SNVS_LPSR, lpsr);  in snvs_rtc_irq_handler()
289 	clk_disable(data->clk);  in snvs_rtc_irq_handler()
300 static void snvs_rtc_action(void *data)  in snvs_rtc_action()  argument
302 	clk_disable_unprepare(data);  in snvs_rtc_action()
307 	struct snvs_rtc_data *data;  in snvs_rtc_probe()  local
311 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in snvs_rtc_probe()
312 	if (!data)  in snvs_rtc_probe()
315 	data->rtc = devm_rtc_allocate_device(&pdev->dev);  in snvs_rtc_probe()
316 	if (IS_ERR(data->rtc))  in snvs_rtc_probe()
317 		return PTR_ERR(data->rtc);  in snvs_rtc_probe()
319 	data->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap");  in snvs_rtc_probe()
321 	if (IS_ERR(data->regmap)) {  in snvs_rtc_probe()
328 		data->regmap = devm_regmap_init_mmio(&pdev->dev, mmio, &snvs_rtc_config);  in snvs_rtc_probe()
330 		data->offset = SNVS_LPREGISTER_OFFSET;  in snvs_rtc_probe()
331 		of_property_read_u32(pdev->dev.of_node, "offset", &data->offset);  in snvs_rtc_probe()
334 	if (IS_ERR(data->regmap)) {  in snvs_rtc_probe()
339 	data->irq = platform_get_irq(pdev, 0);  in snvs_rtc_probe()
340 	if (data->irq < 0)  in snvs_rtc_probe()
341 		return data->irq;  in snvs_rtc_probe()
343 	data->clk = devm_clk_get(&pdev->dev, "snvs-rtc");  in snvs_rtc_probe()
344 	if (IS_ERR(data->clk)) {  in snvs_rtc_probe()
345 		data->clk = NULL;  in snvs_rtc_probe()
347 		ret = clk_prepare_enable(data->clk);  in snvs_rtc_probe()
355 	ret = devm_add_action_or_reset(&pdev->dev, snvs_rtc_action, data->clk);  in snvs_rtc_probe()
359 	platform_set_drvdata(pdev, data);  in snvs_rtc_probe()
362 	regmap_write(data->regmap, data->offset + SNVS_LPPGDR, SNVS_LPPGDR_INIT);  in snvs_rtc_probe()
365 	regmap_write(data->regmap, data->offset + SNVS_LPSR, 0xffffffff);  in snvs_rtc_probe()
368 	ret = snvs_rtc_enable(data, true);  in snvs_rtc_probe()
375 	ret = dev_pm_set_wake_irq(&pdev->dev, data->irq);  in snvs_rtc_probe()
379 	ret = devm_request_irq(&pdev->dev, data->irq, snvs_rtc_irq_handler,  in snvs_rtc_probe()
383 			data->irq, ret);  in snvs_rtc_probe()
387 	data->rtc->ops = &snvs_rtc_ops;  in snvs_rtc_probe()
388 	data->rtc->range_max = U32_MAX;  in snvs_rtc_probe()
390 	return devm_rtc_register_device(data->rtc);  in snvs_rtc_probe()
395 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_suspend_noirq()  local
397 	clk_disable(data->clk);  in snvs_rtc_suspend_noirq()
404 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_resume_noirq()  local
406 	if (data->clk)  in snvs_rtc_resume_noirq()
407 		return clk_enable(data->clk);  in snvs_rtc_resume_noirq()