1 files changed, 45 insertions, 66 deletions

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index c7ff8df347e..911e75cdc12 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -37,6 +37,8 @@
 #include <linux/mod_devicetable.h>
 #include <linux/log2.h>
 #include <linux/pm.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
 
 /* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */
 #include <asm-generic/rtc.h>
@@ -375,50 +377,6 @@ static int cmos_set_alarm(struct device *dev, struct rtc_wkalrm *t)
         return 0;
 }
 
-static int cmos_irq_set_freq(struct device *dev, int freq)
-{
-        struct cmos_rtc *cmos = dev_get_drvdata(dev);
-        int             f;
-        unsigned long   flags;
-
-        if (!is_valid_irq(cmos->irq))
-                return -ENXIO;
-
-        if (!is_power_of_2(freq))
-                return -EINVAL;
-        /* 0 = no irqs; 1 = 2^15 Hz ... 15 = 2^0 Hz */
-        f = ffs(freq);
-        if (f-- > 16)
-                return -EINVAL;
-        f = 16 - f;
-
-        spin_lock_irqsave(&rtc_lock, flags);
-        hpet_set_periodic_freq(freq);
-        CMOS_WRITE(RTC_REF_CLCK_32KHZ | f, RTC_FREQ_SELECT);
-        spin_unlock_irqrestore(&rtc_lock, flags);
-
-        return 0;
-}
-
-static int cmos_irq_set_state(struct device *dev, int enabled)
-{
-        struct cmos_rtc *cmos = dev_get_drvdata(dev);
-        unsigned long   flags;
-
-        if (!is_valid_irq(cmos->irq))
-                return -ENXIO;
-
-        spin_lock_irqsave(&rtc_lock, flags);
-
-        if (enabled)
-                cmos_irq_enable(cmos, RTC_PIE);
-        else
-                cmos_irq_disable(cmos, RTC_PIE);
-
-        spin_unlock_irqrestore(&rtc_lock, flags);
-        return 0;
-}
-
 static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled)
 {
         struct cmos_rtc *cmos = dev_get_drvdata(dev);
@@ -438,25 +396,6 @@ static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled)
         return 0;
 }
 
-static int cmos_update_irq_enable(struct device *dev, unsigned int enabled)
-{
-        struct cmos_rtc *cmos = dev_get_drvdata(dev);
-        unsigned long   flags;
-
-        if (!is_valid_irq(cmos->irq))
-                return -EINVAL;
-
-        spin_lock_irqsave(&rtc_lock, flags);
-
-        if (enabled)
-                cmos_irq_enable(cmos, RTC_UIE);
-        else
-                cmos_irq_disable(cmos, RTC_UIE);
-
-        spin_unlock_irqrestore(&rtc_lock, flags);
-        return 0;
-}
-
 #if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE)
 
 static int cmos_procfs(struct device *dev, struct seq_file *seq)
@@ -501,10 +440,7 @@ static const struct rtc_class_ops cmos_rtc_ops = {
         .read_alarm             = cmos_read_alarm,
         .set_alarm              = cmos_set_alarm,
         .proc                   = cmos_procfs,
-        .irq_set_freq           = cmos_irq_set_freq,
-        .irq_set_state          = cmos_irq_set_state,
         .alarm_irq_enable       = cmos_alarm_irq_enable,
-        .update_irq_enable      = cmos_update_irq_enable,
 };
 
 /*----------------------------------------------------------------*/
@@ -1123,6 +1059,47 @@ static struct pnp_driver cmos_pnp_driver = {
 
 #endif  /* CONFIG_PNP */
 
+#ifdef CONFIG_OF
+static const struct of_device_id of_cmos_match[] = {
+        {
+                .compatible = "motorola,mc146818",
+        },
+        { },
+};
+MODULE_DEVICE_TABLE(of, of_cmos_match);
+
+static __init void cmos_of_init(struct platform_device *pdev)
+{
+        struct device_node *node = pdev->dev.of_node;
+        struct rtc_time time;
+        int ret;
+        const __be32 *val;
+
+        if (!node)
+                return;
+
+        val = of_get_property(node, "ctrl-reg", NULL);
+        if (val)
+                CMOS_WRITE(be32_to_cpup(val), RTC_CONTROL);
+
+        val = of_get_property(node, "freq-reg", NULL);
+        if (val)
+                CMOS_WRITE(be32_to_cpup(val), RTC_FREQ_SELECT);
+
+        get_rtc_time(&time);
+        ret = rtc_valid_tm(&time);
+        if (ret) {
+                struct rtc_time def_time = {
+                        .tm_year = 1,
+                        .tm_mday = 1,
+                };
+                set_rtc_time(&def_time);
+        }
+}
+#else
+static inline void cmos_of_init(struct platform_device *pdev) {}
+#define of_cmos_match NULL
+#endif
 /*----------------------------------------------------------------*/
 
 /* Platform setup should have set up an RTC device, when PNP is
@@ -1131,6 +1108,7 @@ static struct pnp_driver cmos_pnp_driver = {
 
 static int __init cmos_platform_probe(struct platform_device *pdev)
 {
+        cmos_of_init(pdev);
         cmos_wake_setup(&pdev->dev);
         return cmos_do_probe(&pdev->dev,
                         platform_get_resource(pdev, IORESOURCE_IO, 0),
@@ -1162,6 +1140,7 @@ static struct platform_driver cmos_platform_driver = {
 #ifdef CONFIG_PM
                 .pm             = &cmos_pm_ops,
 #endif
+                .of_match_table = of_cmos_match,
         }
 };