rtc: rtc-sh: Support 4-digit year on SH7705/SH7710/SH7712.

All SH-4 parts have a 4-digit year, while the SH-3 parts typically
only use a 2-digit one. The SH7705, SH7710, and SH7712 SH-3 parts
however opted to extend it to 4-digit and still look and act like
an SH-3 RTC in all other ways.

This adds a capability flag (RTC_CAP_4_DIGIT_YEAR) that these
corner-case CPU subtypes can set in their platform data and cleans
up some of the ifdef mess in the driver as a result.

Reported-by: Markus Brunner <super.firetwister@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/arch/sh/kernel/cpu/sh3/setup-sh7710.c b/arch/sh/kernel/cpu/sh3/setup-sh7710.c
index 07f26ab75d97..eb55ac9dbf71 100644
--- a/arch/sh/kernel/cpu/sh3/setup-sh7710.c
+++ b/arch/sh/kernel/cpu/sh3/setup-sh7710.c
@@ -1,7 +1,7 @@
 /*
  * SH3 Setup code for SH7710, SH7712
  *
- *  Copyright (C) 2006  Paul Mundt
+ *  Copyright (C) 2006, 2007  Paul Mundt
  *  Copyright (C) 2007  Nobuhiro Iwamatsu
  *
  * This file is subject to the terms and conditions of the GNU General Public
@@ -13,6 +13,7 @@
 #include <linux/irq.h>
 #include <linux/serial.h>
 #include <asm/sci.h>
+#include <asm/rtc.h>
 
 enum {
         UNUSED = 0,
@@ -130,11 +131,18 @@ static struct resource rtc_resources[] = {
         },
 };
 
+static struct sh_rtc_platform_info rtc_info = {
+        .capabilities   = RTC_CAP_4_DIGIT_YEAR,
+};
+
 static struct platform_device rtc_device = {
         .name           = "sh-rtc",
         .id             = -1,
         .num_resources  = ARRAY_SIZE(rtc_resources),
         .resource       = rtc_resources,
+        .dev            = {
+                .platform_data = &rtc_info,
+        },
 };
 
 static struct plat_sci_port sci_platform_data[] = {