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rtc: rtc-sh: SH-2A support. 

Trivial support for the SH-2A on-chip RTC.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2007-11-26 17:56:31 +09:00
parent 1322b9def9
commit ff1b750605
2 changed files with 19 additions and 3 deletions
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2
drivers/rtc/Kconfig
View File

@ -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.

20
drivers/rtc/rtc-sh.c
View File

@ -26,9 +26,13 @@
#include <asm/rtc.h>
#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 */