drivers/rtc/rtc-ep93xx.c

1 // SPDX-License-Identifier: GPL-2.0
3  * A driver for the RTC embedded in the Cirrus Logic EP93XX processors
11 #include <linux/rtc.h>
31 	struct rtc_device *rtc;  member
40 	comp = readl(ep93xx_rtc->mmio_base + EP93XX_RTC_SWCOMP);  in ep93xx_rtc_get_swcomp()
58 	time = readl(ep93xx_rtc->mmio_base + EP93XX_RTC_DATA);  in ep93xx_rtc_read_time()
69 	writel(secs + 1, ep93xx_rtc->mmio_base + EP93XX_RTC_LOAD);  in ep93xx_rtc_set_time()
96 	ep93xx_rtc_get_swcomp(dev->parent, &preload, NULL);  in comp_preload_show()
107 	ep93xx_rtc_get_swcomp(dev->parent, NULL, &delete);  in comp_delete_show()
128 	ep93xx_rtc = devm_kzalloc(&pdev->dev, sizeof(*ep93xx_rtc), GFP_KERNEL);  in ep93xx_rtc_probe()
130 		return -ENOMEM;  in ep93xx_rtc_probe()
132 	ep93xx_rtc->mmio_base = devm_platform_ioremap_resource(pdev, 0);  in ep93xx_rtc_probe()
133 	if (IS_ERR(ep93xx_rtc->mmio_base))  in ep93xx_rtc_probe()
134 		return PTR_ERR(ep93xx_rtc->mmio_base);  in ep93xx_rtc_probe()
138 	ep93xx_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);  in ep93xx_rtc_probe()
139 	if (IS_ERR(ep93xx_rtc->rtc))  in ep93xx_rtc_probe()
140 		return PTR_ERR(ep93xx_rtc->rtc);  in ep93xx_rtc_probe()
142 	ep93xx_rtc->rtc->ops = &ep93xx_rtc_ops;  in ep93xx_rtc_probe()
143 	ep93xx_rtc->rtc->range_max = U32_MAX;  in ep93xx_rtc_probe()
145 	err = rtc_add_group(ep93xx_rtc->rtc, &ep93xx_rtc_sysfs_files);  in ep93xx_rtc_probe()
149 	return devm_rtc_register_device(ep93xx_rtc->rtc);  in ep93xx_rtc_probe()
153 	{ .compatible = "cirrus,ep9301-rtc" },
160 		.name	= "ep93xx-rtc",
169 MODULE_DESCRIPTION("EP93XX RTC driver");
171 MODULE_ALIAS("platform:ep93xx-rtc");