drivers/rtc/rtc-pic32.c

65 static void pic32_rtc_alarm_clk_enable(struct pic32_rtc_dev *pdata,
70 	spin_lock_irqsave(&pdata->alarm_lock, flags);
72 		if (!pdata->alarm_clk_enabled) {
73 			clk_enable(pdata->clk);
74 			pdata->alarm_clk_enabled = true;
77 		if (pdata->alarm_clk_enabled) {
78 			clk_disable(pdata->clk);
79 			pdata->alarm_clk_enabled = false;
82 	spin_unlock_irqrestore(&pdata->alarm_lock, flags);
87 	struct pic32_rtc_dev *pdata = (struct pic32_rtc_dev *)id;
89 	clk_enable(pdata->clk);
90 	rtc_update_irq(pdata->rtc, 1, RTC_AF | RTC_IRQF);
91 	clk_disable(pdata->clk);
93 	pic32_rtc_alarm_clk_enable(pdata, false);
100 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
101 	void __iomem *base = pdata->reg_base;
103 	clk_enable(pdata->clk);
109 	clk_disable(pdata->clk);
111 	pic32_rtc_alarm_clk_enable(pdata, enabled);
118 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
119 	void __iomem *base = pdata->reg_base;
121 	clk_enable(pdata->clk);
127 	clk_disable(pdata->clk);
134 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
135 	void __iomem *base = pdata->reg_base;
138 	clk_enable(pdata->clk);
167 	clk_disable(pdata->clk);
173 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
174 	void __iomem *base = pdata->reg_base;
178 	clk_enable(pdata->clk);
185 	clk_disable(pdata->clk);
192 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
194 	void __iomem *base = pdata->reg_base;
197 	clk_enable(pdata->clk);
218 	clk_disable(pdata->clk);
224 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
226 	void __iomem *base = pdata->reg_base;
228 	clk_enable(pdata->clk);
236 	clk_disable(pdata->clk);
242 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
243 	void __iomem *base = pdata->reg_base;
246 	clk_enable(pdata->clk);
252 	clk_disable(pdata->clk);
265 static void pic32_rtc_enable(struct pic32_rtc_dev *pdata, int en)
267 	void __iomem *base = pdata->reg_base;
272 	clk_enable(pdata->clk);
284 	clk_disable(pdata->clk);
289 	struct pic32_rtc_dev *pdata = platform_get_drvdata(pdev);
292 	clk_unprepare(pdata->clk);
293 	pdata->clk = NULL;
298 	struct pic32_rtc_dev *pdata;
301 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
302 	if (!pdata)
305 	platform_set_drvdata(pdev, pdata);
307 	pdata->alarm_irq = platform_get_irq(pdev, 0);
308 	if (pdata->alarm_irq < 0)
309 		return pdata->alarm_irq;
311 	pdata->reg_base = devm_platform_ioremap_resource(pdev, 0);
312 	if (IS_ERR(pdata->reg_base))
313 		return PTR_ERR(pdata->reg_base);
315 	pdata->clk = devm_clk_get(&pdev->dev, NULL);
316 	if (IS_ERR(pdata->clk)) {
318 		ret = PTR_ERR(pdata->clk);
319 		pdata->clk = NULL;
323 	spin_lock_init(&pdata->alarm_lock);
325 	pdata->rtc = devm_rtc_allocate_device(&pdev->dev);
326 	if (IS_ERR(pdata->rtc))
327 		return PTR_ERR(pdata->rtc);
329 	clk_prepare_enable(pdata->clk);
331 	pic32_rtc_enable(pdata, 1);
335 	pdata->rtc->ops = &pic32_rtcops;
336 	pdata->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
337 	pdata->rtc->range_max = RTC_TIMESTAMP_END_2099;
339 	ret = devm_rtc_register_device(pdata->rtc);
343 	pdata->rtc->max_user_freq = 128;
346 	ret = devm_request_irq(&pdev->dev, pdata->alarm_irq,
348 			       dev_name(&pdev->dev), pdata);
351 			"IRQ %d error %d\n", pdata->alarm_irq, ret);
355 	clk_disable(pdata->clk);
360 	pic32_rtc_enable(pdata, 0);
361 	clk_disable_unprepare(pdata->clk);