Messages in this thread Patch in this message | | | From | Joshua Clayton <> | Subject | [PATCH 1/9] rtc-pcf2123: Document all registers and useful bits | Date | Wed, 4 Nov 2015 07:36:32 -0800 |
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Document all 16 registers in the pcf2123, as well as useful bit masks from the Control1 and seconds registers
Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> --- drivers/rtc/rtc-pcf2123.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c index d1953bb..7756210 100644 --- a/drivers/rtc/rtc-pcf2123.c +++ b/drivers/rtc/rtc-pcf2123.c @@ -47,6 +47,7 @@ #define DRV_VERSION "0.6" +/* REGISTERS */ #define PCF2123_REG_CTRL1 (0x00) /* Control Register 1 */ #define PCF2123_REG_CTRL2 (0x01) /* Control Register 2 */ #define PCF2123_REG_SC (0x02) /* datetime */ @@ -56,7 +57,27 @@ #define PCF2123_REG_DW (0x06) #define PCF2123_REG_MO (0x07) #define PCF2123_REG_YR (0x08) - +#define PCF2123_REG_ALRM_MN (0x09) /* Alarm Registers */ +#define PCF2123_REG_ALRM_HR (0x0a) +#define PCF2123_REG_ALRM_DM (0x0b) +#define PCF2123_REG_ALRM_DW (0x0c) +#define PCF2123_REG_OFFSET (0x0d) /* Clock Rate Offset Register */ +#define PCF2123_REG_TMR_CLKOUT (0x0e) /* Timer Registers */ +#define PCF2123_REG_CTDWN_TMR (0x0f) +#define PCF2123_REG_MAX (PCF2123_REG_CTDWN_TMR) + +/* PCF2123_REG_CTRL1 BITS */ +#define CTRL1_CLEAR (0x00) /* Clear */ +#define CTRL1_CORRECTION_INT (0x02) /* Correction Interrupt */ +#define CTRL1_12_HOUR (0x04) /* 12 hour time */ +#define CTRL1_STOP (0x20) /* Stop the clock */ +#define CTRL1_SW_RESET (0x58) /* Software reset */ +#define CTRL1_EXT_TEST (0x80) /* External Clock Test mode */ + +/* PCF2123_REG_SC BITS */ +#define OSC_HAS_STOPPED (0x80) /* Clock has been stopped */ + +/* READ/WRITE ADDRESS BITS */ #define PCF2123_SUBADDR (1 << 4) #define PCF2123_WRITE ((0 << 7) | PCF2123_SUBADDR) #define PCF2123_READ ((1 << 7) | PCF2123_SUBADDR) -- 2.5.0
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