52 static u64 rtc_read_lpsrt(struct snvs_rtc_data *data)  in rtc_read_lpsrt()  argument
56 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &msb);  in rtc_read_lpsrt()
57 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &lsb);  in rtc_read_lpsrt()
64 static u32 rtc_read_lp_counter(struct snvs_rtc_data *data)  in rtc_read_lp_counter()  argument
74 	read1 = rtc_read_lpsrt(data);  in rtc_read_lp_counter()
77 		read1 = rtc_read_lpsrt(data);  in rtc_read_lp_counter()
81 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");  in rtc_read_lp_counter()
88 static int rtc_read_lp_counter_lsb(struct snvs_rtc_data *data, u32 *lsb)  in rtc_read_lp_counter_lsb()  argument
94 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);  in rtc_read_lp_counter_lsb()
97 		regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);  in rtc_read_lp_counter_lsb()
101 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");  in rtc_read_lp_counter_lsb()
109 static int rtc_write_sync_lp(struct snvs_rtc_data *data)  in rtc_write_sync_lp()  argument
116 	ret = rtc_read_lp_counter_lsb(data, &count1);  in rtc_write_sync_lp()
122 		ret = rtc_read_lp_counter_lsb(data, &count2);  in rtc_write_sync_lp()
128 		dev_err(&data->rtc->dev, "Timeout waiting for LPSRT Counter to change\n");  in rtc_write_sync_lp()
134 static int snvs_rtc_enable(struct snvs_rtc_data *data, bool enable)  in snvs_rtc_enable()  argument
139 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_SRTC_ENV,  in snvs_rtc_enable()
143 		regmap_read(data->regmap, data->offset + SNVS_LPCR, &lpcr);  in snvs_rtc_enable()
162 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_read_time()  local
166 	ret = clk_enable(data->clk);  in snvs_rtc_read_time()
170 	time = rtc_read_lp_counter(data);  in snvs_rtc_read_time()
173 	clk_disable(data->clk);  in snvs_rtc_read_time()
180 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_set_time()  local
184 	ret = clk_enable(data->clk);  in snvs_rtc_set_time()
189 	ret = snvs_rtc_enable(data, false);  in snvs_rtc_set_time()
194 	regmap_write(data->regmap, data->offset + SNVS_LPSRTCLR, time << CNTR_TO_SECS_SH);  in snvs_rtc_set_time()
195 	regmap_write(data->regmap, data->offset + SNVS_LPSRTCMR, time >> (32 - CNTR_TO_SECS_SH));  in snvs_rtc_set_time()
198 	ret = snvs_rtc_enable(data, true);  in snvs_rtc_set_time()
200 	clk_disable(data->clk);  in snvs_rtc_set_time()
207 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_read_alarm()  local
211 	ret = clk_enable(data->clk);  in snvs_rtc_read_alarm()
215 	regmap_read(data->regmap, data->offset + SNVS_LPTAR, &lptar);  in snvs_rtc_read_alarm()
218 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);  in snvs_rtc_read_alarm()
221 	clk_disable(data->clk);  in snvs_rtc_read_alarm()
228 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_alarm_irq_enable()  local
231 	ret = clk_enable(data->clk);  in snvs_rtc_alarm_irq_enable()
235 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR,  in snvs_rtc_alarm_irq_enable()
239 	ret = rtc_write_sync_lp(data);  in snvs_rtc_alarm_irq_enable()
241 	clk_disable(data->clk);  in snvs_rtc_alarm_irq_enable()
248 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_set_alarm()  local
252 	ret = clk_enable(data->clk);  in snvs_rtc_set_alarm()
256 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_LPTA_EN, 0);  in snvs_rtc_set_alarm()
257 	ret = rtc_write_sync_lp(data);  in snvs_rtc_set_alarm()
260 	regmap_write(data->regmap, data->offset + SNVS_LPTAR, time);  in snvs_rtc_set_alarm()
263 	regmap_write(data->regmap, data->offset + SNVS_LPSR, SNVS_LPSR_LPTA);  in snvs_rtc_set_alarm()
265 	clk_disable(data->clk);  in snvs_rtc_set_alarm()
281 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_irq_handler()  local
285 	clk_enable(data->clk);  in snvs_rtc_irq_handler()
287 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);  in snvs_rtc_irq_handler()
295 		rtc_update_irq(data->rtc, 1, events);  in snvs_rtc_irq_handler()
299 	regmap_write(data->regmap, data->offset + SNVS_LPSR, lpsr);  in snvs_rtc_irq_handler()
301 	clk_disable(data->clk);  in snvs_rtc_irq_handler()
312 static void snvs_rtc_action(void *data)  in snvs_rtc_action()  argument
314 	clk_disable_unprepare(data);  in snvs_rtc_action()
319 	struct snvs_rtc_data *data;  in snvs_rtc_probe()  local
323 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in snvs_rtc_probe()
324 	if (!data)  in snvs_rtc_probe()
327 	data->rtc = devm_rtc_allocate_device(&pdev->dev);  in snvs_rtc_probe()
328 	if (IS_ERR(data->rtc))  in snvs_rtc_probe()
329 		return PTR_ERR(data->rtc);  in snvs_rtc_probe()
331 	data->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap");  in snvs_rtc_probe()
333 	if (IS_ERR(data->regmap)) {  in snvs_rtc_probe()
340 		data->regmap = devm_regmap_init_mmio(&pdev->dev, mmio, &snvs_rtc_config);  in snvs_rtc_probe()
342 		data->offset = SNVS_LPREGISTER_OFFSET;  in snvs_rtc_probe()
343 		of_property_read_u32(pdev->dev.of_node, "offset", &data->offset);  in snvs_rtc_probe()
346 	if (IS_ERR(data->regmap)) {  in snvs_rtc_probe()
351 	data->irq = platform_get_irq(pdev, 0);  in snvs_rtc_probe()
352 	if (data->irq < 0)  in snvs_rtc_probe()
353 		return data->irq;  in snvs_rtc_probe()
355 	data->clk = devm_clk_get(&pdev->dev, "snvs-rtc");  in snvs_rtc_probe()
356 	if (IS_ERR(data->clk)) {  in snvs_rtc_probe()
357 		data->clk = NULL;  in snvs_rtc_probe()
359 		ret = clk_prepare_enable(data->clk);  in snvs_rtc_probe()
367 	ret = devm_add_action_or_reset(&pdev->dev, snvs_rtc_action, data->clk);  in snvs_rtc_probe()
371 	platform_set_drvdata(pdev, data);  in snvs_rtc_probe()
374 	regmap_write(data->regmap, data->offset + SNVS_LPPGDR, SNVS_LPPGDR_INIT);  in snvs_rtc_probe()
377 	regmap_write(data->regmap, data->offset + SNVS_LPSR, 0xffffffff);  in snvs_rtc_probe()
380 	ret = snvs_rtc_enable(data, true);  in snvs_rtc_probe()
387 	ret = dev_pm_set_wake_irq(&pdev->dev, data->irq);  in snvs_rtc_probe()
391 	ret = devm_request_irq(&pdev->dev, data->irq, snvs_rtc_irq_handler,  in snvs_rtc_probe()
395 			data->irq, ret);  in snvs_rtc_probe()
399 	data->rtc->ops = &snvs_rtc_ops;  in snvs_rtc_probe()
400 	data->rtc->range_max = U32_MAX;  in snvs_rtc_probe()
402 	return devm_rtc_register_device(data->rtc);  in snvs_rtc_probe()
407 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_suspend_noirq()  local
409 	clk_disable(data->clk);  in snvs_rtc_suspend_noirq()
416 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_resume_noirq()  local
418 	if (data->clk)  in snvs_rtc_resume_noirq()
419 		return clk_enable(data->clk);  in snvs_rtc_resume_noirq()