diff options
Diffstat (limited to 'drivers/rtc/rtc-ep93xx.c')
| -rw-r--r-- | drivers/rtc/rtc-ep93xx.c | 155 |
1 files changed, 92 insertions, 63 deletions
diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c index ef4f147f3c0..5e4f5dc40ba 100644 --- a/drivers/rtc/rtc-ep93xx.c +++ b/drivers/rtc/rtc-ep93xx.c @@ -12,32 +12,58 @@ #include <linux/module.h> #include <linux/rtc.h> #include <linux/platform_device.h> -#include <asm/hardware.h> +#include <linux/io.h> +#include <linux/gfp.h> + +#define EP93XX_RTC_DATA 0x000 +#define EP93XX_RTC_MATCH 0x004 +#define EP93XX_RTC_STATUS 0x008 +#define EP93XX_RTC_STATUS_INTR (1<<0) +#define EP93XX_RTC_LOAD 0x00C +#define EP93XX_RTC_CONTROL 0x010 +#define EP93XX_RTC_CONTROL_MIE (1<<0) +#define EP93XX_RTC_SWCOMP 0x108 +#define EP93XX_RTC_SWCOMP_DEL_MASK 0x001f0000 +#define EP93XX_RTC_SWCOMP_DEL_SHIFT 16 +#define EP93XX_RTC_SWCOMP_INT_MASK 0x0000ffff +#define EP93XX_RTC_SWCOMP_INT_SHIFT 0 + +#define DRV_VERSION "0.3" -#define EP93XX_RTC_REG(x) (EP93XX_RTC_BASE + (x)) -#define EP93XX_RTC_DATA EP93XX_RTC_REG(0x0000) -#define EP93XX_RTC_LOAD EP93XX_RTC_REG(0x000C) -#define EP93XX_RTC_SWCOMP EP93XX_RTC_REG(0x0108) - -#define DRV_VERSION "0.2" +/* + * struct device dev.platform_data is used to store our private data + * because struct rtc_device does not have a variable to hold it. + */ +struct ep93xx_rtc { + void __iomem *mmio_base; + struct rtc_device *rtc; +}; -static int ep93xx_get_swcomp(struct device *dev, unsigned short *preload, +static int ep93xx_rtc_get_swcomp(struct device *dev, unsigned short *preload, unsigned short *delete) { - unsigned short comp = __raw_readl(EP93XX_RTC_SWCOMP); + struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); + unsigned long comp; + + comp = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_SWCOMP); if (preload) - *preload = comp & 0xffff; + *preload = (comp & EP93XX_RTC_SWCOMP_INT_MASK) + >> EP93XX_RTC_SWCOMP_INT_SHIFT; if (delete) - *delete = (comp >> 16) & 0x1f; + *delete = (comp & EP93XX_RTC_SWCOMP_DEL_MASK) + >> EP93XX_RTC_SWCOMP_DEL_SHIFT; return 0; } static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm) { - unsigned long time = __raw_readl(EP93XX_RTC_DATA); + struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); + unsigned long time; + + time = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_DATA); rtc_time_to_tm(time, tm); return 0; @@ -45,27 +71,17 @@ static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm) static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs) { - __raw_writel(secs + 1, EP93XX_RTC_LOAD); - return 0; -} + struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); -static int ep93xx_rtc_set_time(struct device *dev, struct rtc_time *tm) -{ - int err; - unsigned long secs; - - err = rtc_tm_to_time(tm, &secs); - if (err != 0) - return err; - - return ep93xx_rtc_set_mmss(dev, secs); + __raw_writel(secs + 1, ep93xx_rtc->mmio_base + EP93XX_RTC_LOAD); + return 0; } static int ep93xx_rtc_proc(struct device *dev, struct seq_file *seq) { unsigned short preload, delete; - ep93xx_get_swcomp(dev, &preload, &delete); + ep93xx_rtc_get_swcomp(dev, &preload, &delete); seq_printf(seq, "preload\t\t: %d\n", preload); seq_printf(seq, "delete\t\t: %d\n", delete); @@ -75,86 +91,99 @@ static int ep93xx_rtc_proc(struct device *dev, struct seq_file *seq) static const struct rtc_class_ops ep93xx_rtc_ops = { .read_time = ep93xx_rtc_read_time, - .set_time = ep93xx_rtc_set_time, .set_mmss = ep93xx_rtc_set_mmss, .proc = ep93xx_rtc_proc, }; -static ssize_t ep93xx_sysfs_show_comp_preload(struct device *dev, +static ssize_t ep93xx_rtc_show_comp_preload(struct device *dev, struct device_attribute *attr, char *buf) { unsigned short preload; - ep93xx_get_swcomp(dev, &preload, NULL); + ep93xx_rtc_get_swcomp(dev, &preload, NULL); return sprintf(buf, "%d\n", preload); } -static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_sysfs_show_comp_preload, NULL); +static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_rtc_show_comp_preload, NULL); -static ssize_t ep93xx_sysfs_show_comp_delete(struct device *dev, +static ssize_t ep93xx_rtc_show_comp_delete(struct device *dev, struct device_attribute *attr, char *buf) { unsigned short delete; - ep93xx_get_swcomp(dev, NULL, &delete); + ep93xx_rtc_get_swcomp(dev, NULL, &delete); return sprintf(buf, "%d\n", delete); } -static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_sysfs_show_comp_delete, NULL); +static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_rtc_show_comp_delete, NULL); + +static struct attribute *ep93xx_rtc_attrs[] = { + &dev_attr_comp_preload.attr, + &dev_attr_comp_delete.attr, + NULL +}; +static const struct attribute_group ep93xx_rtc_sysfs_files = { + .attrs = ep93xx_rtc_attrs, +}; -static int __devinit ep93xx_rtc_probe(struct platform_device *dev) +static int ep93xx_rtc_probe(struct platform_device *pdev) { - struct rtc_device *rtc = rtc_device_register("ep93xx", - &dev->dev, &ep93xx_rtc_ops, THIS_MODULE); + struct ep93xx_rtc *ep93xx_rtc; + struct resource *res; + int err; - if (IS_ERR(rtc)) { - return PTR_ERR(rtc); - } + ep93xx_rtc = devm_kzalloc(&pdev->dev, sizeof(*ep93xx_rtc), GFP_KERNEL); + if (!ep93xx_rtc) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ep93xx_rtc->mmio_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ep93xx_rtc->mmio_base)) + return PTR_ERR(ep93xx_rtc->mmio_base); - platform_set_drvdata(dev, rtc); + pdev->dev.platform_data = ep93xx_rtc; + platform_set_drvdata(pdev, ep93xx_rtc); - device_create_file(&dev->dev, &dev_attr_comp_preload); - device_create_file(&dev->dev, &dev_attr_comp_delete); + ep93xx_rtc->rtc = devm_rtc_device_register(&pdev->dev, + pdev->name, &ep93xx_rtc_ops, THIS_MODULE); + if (IS_ERR(ep93xx_rtc->rtc)) { + err = PTR_ERR(ep93xx_rtc->rtc); + goto exit; + } + + err = sysfs_create_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files); + if (err) + goto exit; return 0; + +exit: + pdev->dev.platform_data = NULL; + return err; } -static int __devexit ep93xx_rtc_remove(struct platform_device *dev) +static int ep93xx_rtc_remove(struct platform_device *pdev) { - struct rtc_device *rtc = platform_get_drvdata(dev); - - if (rtc) - rtc_device_unregister(rtc); - - platform_set_drvdata(dev, NULL); + sysfs_remove_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files); + pdev->dev.platform_data = NULL; return 0; } -static struct platform_driver ep93xx_rtc_platform_driver = { +static struct platform_driver ep93xx_rtc_driver = { .driver = { .name = "ep93xx-rtc", .owner = THIS_MODULE, }, .probe = ep93xx_rtc_probe, - .remove = __devexit_p(ep93xx_rtc_remove), + .remove = ep93xx_rtc_remove, }; -static int __init ep93xx_rtc_init(void) -{ - return platform_driver_register(&ep93xx_rtc_platform_driver); -} - -static void __exit ep93xx_rtc_exit(void) -{ - platform_driver_unregister(&ep93xx_rtc_platform_driver); -} +module_platform_driver(ep93xx_rtc_driver); MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); MODULE_DESCRIPTION("EP93XX RTC driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(ep93xx_rtc_init); -module_exit(ep93xx_rtc_exit); +MODULE_ALIAS("platform:ep93xx-rtc"); |