1 // SPDX-License-Identifier: GPL-2.0
69 	*secs = (unsigned long)readl(sp_rtc->reg_base + RTC_TIMER_OUT);  in sp_get_seconds()
76 	writel((u32)secs, sp_rtc->reg_base + RTC_TIMER_SET);  in sp_set_seconds()
105 	alarm_time = rtc_tm_to_time64(&alrm->time);  in sp_rtc_set_alarm()
107 	writel((u32)alarm_time, sp_rtc->reg_base + RTC_ALARM_SET);  in sp_rtc_set_alarm()
117 	alarm_time = readl(sp_rtc->reg_base + RTC_ALARM_SET);  in sp_rtc_read_alarm()
121 		alrm->enabled = 0;  in sp_rtc_read_alarm()
123 		alrm->enabled = 1;  in sp_rtc_read_alarm()
125 	rtc_time64_to_tm((unsigned long)(alarm_time), &alrm->time);  in sp_rtc_read_alarm()
139 			sp_rtc->reg_base + RTC_CTRL);  in sp_rtc_alarm_irq_enable()
142 			0x0, sp_rtc->reg_base + RTC_CTRL);  in sp_rtc_alarm_irq_enable()
158 	struct sunplus_rtc *sp_rtc = dev_get_drvdata(&plat_dev->dev);  in sp_rtc_irq_handler()
160 	rtc_update_irq(sp_rtc->rtc, 1, RTC_IRQF | RTC_AF);  in sp_rtc_irq_handler()
161 	dev_dbg(&plat_dev->dev, "[RTC] ALARM INT\n");  in sp_rtc_irq_handler()
167  * -------------------------------------------------------------------------------------
169  *         x              x                 0            Disable
170  *         0              0                 1            0.86mA (2K Ohm with diode)
171  *         1              0                 1            1.81mA (250 Ohm with diode)
172  *         2              0                 1            2.07mA (50 Ohm with diode)
173  *         3              0                 1            16.0mA (0 Ohm with diode)
174  *         0              1                 1            1.36mA (2K Ohm without diode)
175  *         1              1                 1            3.99mA (250 Ohm without diode)
176  *         2              1                 1            4.41mA (50 Ohm without diode)
177  *         3              1                 1            16.0mA (0 Ohm without diode)
178  * -------------------------------------------------------------------------------------
186 	if (of_property_read_u32(dev.of_node, "trickle-resistor-ohms", &ohms) ||  in sp_rtc_set_trickle_charger()
187 	    of_property_read_u32(dev.of_node, "aux-voltage-chargeable", &chargeable)) {  in sp_rtc_set_trickle_charger()
210 	writel(BAT_CHARGE_RSEL_MASK_BIT | rsel, sp_rtc->reg_base + RTC_BATT_CHARGE_CTRL);  in sp_rtc_set_trickle_charger()
215 		       sp_rtc->reg_base + RTC_BATT_CHARGE_CTRL);  in sp_rtc_set_trickle_charger()
219 		       sp_rtc->reg_base + RTC_BATT_CHARGE_CTRL);  in sp_rtc_set_trickle_charger()
222 		dev_err(&dev, "invalid aux-voltage-chargeable value (%d)\n", chargeable);  in sp_rtc_set_trickle_charger()
226 	writel(BAT_CHARGE_EN_MASK_BIT | BAT_CHARGE_EN, sp_rtc->reg_base + RTC_BATT_CHARGE_CTRL);  in sp_rtc_set_trickle_charger()
234 	sp_rtc = devm_kzalloc(&plat_dev->dev, sizeof(*sp_rtc), GFP_KERNEL);  in sp_rtc_probe()
236 		return -ENOMEM;  in sp_rtc_probe()
238 	sp_rtc->res = platform_get_resource_byname(plat_dev, IORESOURCE_MEM, RTC_REG_NAME);  in sp_rtc_probe()
239 	sp_rtc->reg_base = devm_ioremap_resource(&plat_dev->dev, sp_rtc->res);  in sp_rtc_probe()
240 	if (IS_ERR(sp_rtc->reg_base))  in sp_rtc_probe()
241 		return dev_err_probe(&plat_dev->dev, PTR_ERR(sp_rtc->reg_base),  in sp_rtc_probe()
243 	dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",  in sp_rtc_probe()
244 		sp_rtc->res->start, (unsigned long)sp_rtc->reg_base);  in sp_rtc_probe()
246 	sp_rtc->irq = platform_get_irq(plat_dev, 0);  in sp_rtc_probe()
247 	if (sp_rtc->irq < 0)  in sp_rtc_probe()
248 		return dev_err_probe(&plat_dev->dev, sp_rtc->irq, "platform_get_irq failed\n");  in sp_rtc_probe()
250 	ret = devm_request_irq(&plat_dev->dev, sp_rtc->irq, sp_rtc_irq_handler,  in sp_rtc_probe()
253 		return dev_err_probe(&plat_dev->dev, ret, "devm_request_irq failed:\n");  in sp_rtc_probe()
255 	sp_rtc->rtcclk = devm_clk_get(&plat_dev->dev, NULL);  in sp_rtc_probe()
256 	if (IS_ERR(sp_rtc->rtcclk))  in sp_rtc_probe()
257 		return dev_err_probe(&plat_dev->dev, PTR_ERR(sp_rtc->rtcclk),  in sp_rtc_probe()
260 	sp_rtc->rstc = devm_reset_control_get_exclusive(&plat_dev->dev, NULL);  in sp_rtc_probe()
261 	if (IS_ERR(sp_rtc->rstc))  in sp_rtc_probe()
262 		return dev_err_probe(&plat_dev->dev, PTR_ERR(sp_rtc->rstc),  in sp_rtc_probe()
265 	ret = clk_prepare_enable(sp_rtc->rtcclk);  in sp_rtc_probe()
269 	ret = reset_control_deassert(sp_rtc->rstc);  in sp_rtc_probe()
273 	device_init_wakeup(&plat_dev->dev, 1);  in sp_rtc_probe()
274 	dev_set_drvdata(&plat_dev->dev, sp_rtc);  in sp_rtc_probe()
276 	sp_rtc->rtc = devm_rtc_allocate_device(&plat_dev->dev);  in sp_rtc_probe()
277 	if (IS_ERR(sp_rtc->rtc)) {  in sp_rtc_probe()
278 		ret = PTR_ERR(sp_rtc->rtc);  in sp_rtc_probe()
282 	sp_rtc->rtc->range_max = U32_MAX;  in sp_rtc_probe()
283 	sp_rtc->rtc->range_min = 0;  in sp_rtc_probe()
284 	sp_rtc->rtc->ops = &sp_rtc_ops;  in sp_rtc_probe()
286 	ret = devm_rtc_register_device(sp_rtc->rtc);  in sp_rtc_probe()
290 	/* Setup trickle charger */  in sp_rtc_probe()
291 	if (plat_dev->dev.of_node)  in sp_rtc_probe()
292 		sp_rtc_set_trickle_charger(plat_dev->dev);  in sp_rtc_probe()
295 	writel(DIS_SYS_RST_RTC_MASK_BIT | DIS_SYS_RST_RTC, sp_rtc->reg_base + RTC_CTRL);  in sp_rtc_probe()
300 	reset_control_assert(sp_rtc->rstc);  in sp_rtc_probe()
302 	clk_disable_unprepare(sp_rtc->rtcclk);  in sp_rtc_probe()
309 	struct sunplus_rtc *sp_rtc = dev_get_drvdata(&plat_dev->dev);  in sp_rtc_remove()
311 	device_init_wakeup(&plat_dev->dev, 0);  in sp_rtc_remove()
312 	reset_control_assert(sp_rtc->rstc);  in sp_rtc_remove()
313 	clk_disable_unprepare(sp_rtc->rtcclk);  in sp_rtc_remove()
324 		enable_irq_wake(sp_rtc->irq);  in sp_rtc_suspend()
334 		disable_irq_wake(sp_rtc->irq);  in sp_rtc_resume()
341 	{ .compatible = "sunplus,sp7021-rtc" },
352 		.name	= "sp7021-rtc",