1 files changed, 13 insertions, 11 deletions

diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 8e8c8b8e81ee..c1d6a1880ccf 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -26,17 +26,7 @@
 #include <asm/rtc.h>
 
 #define DRV_NAME        "sh-rtc"
-#define DRV_VERSION     "0.1.3"
-
-#ifdef CONFIG_CPU_SH3
-#define rtc_reg_size            sizeof(u16)
-#define RTC_BIT_INVERTED        0       /* No bug on SH7708, SH7709A */
-#define RTC_DEF_CAPABILITIES    0UL
-#elif defined(CONFIG_CPU_SH4)
-#define rtc_reg_size            sizeof(u32)
-#define RTC_BIT_INVERTED        0x40    /* bug on SH7750, SH7750S */
-#define RTC_DEF_CAPABILITIES    RTC_CAP_4_DIGIT_YEAR
-#endif
+#define DRV_VERSION     "0.1.6"
 
 #define RTC_REG(r)      ((r) * rtc_reg_size)
 
@@ -58,6 +48,18 @@
 #define RCR1            RTC_REG(14)     /* Control */
 #define RCR2            RTC_REG(15)     /* Control */
 
+/*
+ * Note on RYRAR and RCR3: Up until this point most of the register
+ * definitions are consistent across all of the available parts. However,
+ * the placement of the optional RYRAR and RCR3 (the RYRAR control
+ * register used to control RYRCNT/RYRAR compare) varies considerably
+ * across various parts, occasionally being mapped in to a completely
+ * unrelated address space. For proper RYRAR support a separate resource
+ * would have to be handed off, but as this is purely optional in
+ * practice, we simply opt not to support it, thereby keeping the code
+ * quite a bit more simplified.
+ */
+
 /* ALARM Bits - or with BCD encoded value */
 #define AR_ENB          0x80    /* Enable for alarm cmp   */