drivers/rtc/rtc-da9052.c

12 #include <linux/rtc.h>
19 #define rtc_err(rtc, fmt, ...) \
20 		dev_err(rtc->da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__)
25 	struct rtc_device *rtc;
29 static int da9052_rtc_enable_alarm(struct da9052_rtc *rtc, bool enable)
33 		ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
37 			rtc_err(rtc, "Failed to enable ALM: %d\n", ret);
39 		ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
42 			rtc_err(rtc, "Write error: %d\n", ret);
49 	struct da9052_rtc *rtc = data;
51 	rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
56 static int da9052_read_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
63 	ret = da9052_group_read(rtc->da9052, DA9052_ALARM_MI_REG, 5, &v[0][0]);
65 		rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
70 		ret = da9052_group_read(rtc->da9052,
73 			rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
94 	rtc_err(rtc, "Timed out reading alarm time\n");
99 static int da9052_set_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
101 	struct da9052 *da9052 = rtc->da9052;
120 		rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
135 		rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);
140 static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc)
144 	ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG);
146 		rtc_err(rtc, "Failed to read ALM: %d\n", ret);
155 	struct da9052_rtc *rtc = dev_get_drvdata(dev);
161 	ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, &v[0][0]);
163 		rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
168 		ret = da9052_group_read(rtc->da9052,
171 			rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
191 	rtc_err(rtc, "Timed out reading time\n");
198 	struct da9052_rtc *rtc;
206 	rtc = dev_get_drvdata(dev);
215 	ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
217 		rtc_err(rtc, "failed to set RTC time: %d\n", ret);
225 	struct da9052_rtc *rtc = dev_get_drvdata(dev);
227 	ret = da9052_read_alarm(rtc, tm);
229 		rtc_err(rtc, "failed to read RTC alarm: %d\n", ret);
233 	alrm->enabled = da9052_rtc_get_alarm_status(rtc);
241 	struct da9052_rtc *rtc = dev_get_drvdata(dev);
247 	ret = da9052_rtc_enable_alarm(rtc, 0);
251 	ret = da9052_set_alarm(rtc, tm);
255 	ret = da9052_rtc_enable_alarm(rtc, 1);
261 	struct da9052_rtc *rtc = dev_get_drvdata(dev);
263 	return da9052_rtc_enable_alarm(rtc, enabled);
276 	struct da9052_rtc *rtc;
279 	rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL);
280 	if (!rtc)
283 	rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
284 	platform_set_drvdata(pdev, rtc);
286 	ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
288 		rtc_err(rtc,
293 	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
296 		rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);
299 	rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
300 	if (IS_ERR(rtc->rtc))
301 		return PTR_ERR(rtc->rtc);
303 	rtc->rtc->ops = &da9052_rtc_ops;
304 	rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
305 	rtc->rtc->range_max = RTC_TIMESTAMP_END_2063;
307 	ret = devm_rtc_register_device(rtc->rtc);
311 	ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
312 				da9052_rtc_irq, rtc);
314 		rtc_err(rtc, "irq registration failed: %d\n", ret);
324 		.name	= "da9052-rtc",
333 MODULE_ALIAS("platform:da9052-rtc");