From ff1b7506051014cc38036401b89e426bf3d6a608 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Mon, 26 Nov 2007 17:56:31 +0900 Subject: [PATCH] rtc: rtc-sh: SH-2A support. Trivial support for the SH-2A on-chip RTC. Signed-off-by: Paul Mundt --- drivers/rtc/Kconfig | 2 +- drivers/rtc/rtc-sh.c | 20 ++++++++++++++++++-- 2 files changed, 19 insertions(+), 3 deletions(-) diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 5900c77..45e4b96 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -404,7 +404,7 @@ config RTC_DRV_SA1100 config RTC_DRV_SH tristate "SuperH On-Chip RTC" - depends on RTC_CLASS && (CPU_SH3 || CPU_SH4 || CPU_SH5) + depends on RTC_CLASS && SUPERH help Say Y here to enable support for the on-chip RTC found in most SuperH processors. diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c index a1d5d55..af9bc57 100644 --- a/drivers/rtc/rtc-sh.c +++ b/drivers/rtc/rtc-sh.c @@ -26,9 +26,13 @@ #include #define DRV_NAME "sh-rtc" -#define DRV_VERSION "0.1.4" +#define DRV_VERSION "0.1.5" -#ifdef CONFIG_CPU_SH3 +#ifdef CONFIG_CPU_SH2A +#define rtc_reg_size sizeof(u16) +#define RTC_BIT_INVERTED 0 +#define RTC_DEF_CAPABILITIES RTC_CAP_4_DIGIT_YEAR +#elif defined(CONFIG_CPU_SH3) #define rtc_reg_size sizeof(u16) #define RTC_BIT_INVERTED 0 /* No bug on SH7708, SH7709A */ #define RTC_DEF_CAPABILITIES 0UL @@ -62,6 +66,18 @@ #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 */ -- 2.7.4