linux-kernel - Re: [PATCH 1/9] rtc-pcf2123: Document all registers and useful bits

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Date:	Tue, 24 Nov 2015 22:51:36 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Joshua Clayton <stillcompiling@...il.com>
Cc:	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/9] rtc-pcf2123: Document all registers and useful bits

Hi,

On 04/11/2015 at 07:36:32 -0800, Joshua Clayton wrote :
> 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@...il.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 */
> +

Can you use the BIT() macro?


-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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