rtc-s3c: add variants for S3C2443 and S3C2416

Especially the TICNT registers are different from the two rtc
types that currently exists.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 36 insertions, 4 deletions

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index a6f95fb74dd2..78951866f8ab 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -35,6 +35,8 @@
 
 enum s3c_cpu_type {
         TYPE_S3C2410,
+        TYPE_S3C2416,
+        TYPE_S3C2443,
         TYPE_S3C64XX,
 };
 
@@ -132,6 +134,7 @@ static int s3c_rtc_setfreq(struct device *dev, int freq)
         struct platform_device *pdev = to_platform_device(dev);
         struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
         unsigned int tmp = 0;
+        int val;
 
         if (!is_power_of_2(freq))
                 return -EINVAL;
@@ -139,12 +142,22 @@ static int s3c_rtc_setfreq(struct device *dev, int freq)
         clk_enable(rtc_clk);
         spin_lock_irq(&s3c_rtc_pie_lock);
 
-        if (s3c_rtc_cpu_type == TYPE_S3C2410) {
+        if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
                 tmp = readb(s3c_rtc_base + S3C2410_TICNT);
                 tmp &= S3C2410_TICNT_ENABLE;
         }
 
-        tmp |= (rtc_dev->max_user_freq / freq)-1;
+        val = (rtc_dev->max_user_freq / freq) - 1;
+
+        if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
+                tmp |= S3C2443_TICNT_PART(val);
+                writel(S3C2443_TICNT1_PART(val), s3c_rtc_base + S3C2443_TICNT1);
+
+                if (s3c_rtc_cpu_type == TYPE_S3C2416)
+                        writel(S3C2416_TICNT2_PART(val), s3c_rtc_base + S3C2416_TICNT2);
+        } else {
+                tmp |= val;
+        }
 
         writel(tmp, s3c_rtc_base + S3C2410_TICNT);
         spin_unlock_irq(&s3c_rtc_pie_lock);
@@ -371,7 +384,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en)
                 tmp &= ~S3C2410_RTCCON_RTCEN;
                 writew(tmp, base + S3C2410_RTCCON);
 
-                if (s3c_rtc_cpu_type == TYPE_S3C2410) {
+                if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
                         tmp = readb(base + S3C2410_TICNT);
                         tmp &= ~S3C2410_TICNT_ENABLE;
                         writeb(tmp, base + S3C2410_TICNT);
@@ -448,6 +461,7 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
         struct rtc_time rtc_tm;
         struct resource *res;
         int ret;
+        int tmp;
 
         pr_debug("%s: probe=%p\n", __func__, pdev);
 
@@ -541,11 +555,17 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
                 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
         }
 
-        if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+        if (s3c_rtc_cpu_type != TYPE_S3C2410)
                 rtc->max_user_freq = 32768;
         else
                 rtc->max_user_freq = 128;
 
+        if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
+                tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
+                tmp |= S3C2443_RTCCON_TICSEL;
+                writew(tmp, s3c_rtc_base + S3C2410_RTCCON);
+        }
+
         platform_set_drvdata(pdev, rtc);
 
         s3c_rtc_setfreq(&pdev->dev, 1);
@@ -650,6 +670,12 @@ static const struct of_device_id s3c_rtc_dt_match[] = {
                 .compatible = "samsung,s3c2410-rtc"
                 .data = TYPE_S3C2410,
         }, {
+                .compatible = "samsung,s3c2416-rtc"
+                .data = TYPE_S3C2416,
+        }, {
+                .compatible = "samsung,s3c2443-rtc"
+                .data = TYPE_S3C2443,
+        }, {
                 .compatible = "samsung,s3c6410-rtc"
                 .data = TYPE_S3C64XX,
         },
@@ -665,6 +691,12 @@ static struct platform_device_id s3c_rtc_driver_ids[] = {
                 .name           = "s3c2410-rtc",
                 .driver_data    = TYPE_S3C2410,
         }, {
+                .name           = "s3c2416-rtc",
+                .driver_data    = TYPE_S3C2416,
+        }, {
+                .name           = "s3c2443-rtc",
+                .driver_data    = TYPE_S3C2443,
+        }, {
                 .name           = "s3c64xx-rtc",
                 .driver_data    = TYPE_S3C64XX,
         },