[U-Boot] [PATCH] rtc: add support of mx27 rtc

[stefano babic <sbabic@denx.de>]

Am 08/08/2012 19:04, schrieb Philippe Reynes:
> This driver has been tested on board armadeus apf27.
> 
> Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
> ---

Hi Philippe,

>  arch/arm/include/asm/arch-mx27/imx-regs.h |    3 +
>  arch/arm/include/asm/arch-mx27/regs-rtc.h |   40 ++++++++++++++
>  drivers/rtc/Makefile                      |    1 +
>  drivers/rtc/mx27rtc.c                     |   83 +++++++++++++++++++++++++++++
>  4 files changed, 127 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/include/asm/arch-mx27/regs-rtc.h
>  create mode 100644 drivers/rtc/mx27rtc.c
> 
> diff --git a/arch/arm/include/asm/arch-mx27/imx-regs.h b/arch/arm/include/asm/arch-mx27/imx-regs.h
> index ced5b2a..f7cf85b 100644
> --- a/arch/arm/include/asm/arch-mx27/imx-regs.h
> +++ b/arch/arm/include/asm/arch-mx27/imx-regs.h
> @@ -24,6 +24,8 @@
>  #ifndef _IMX_REGS_H
>  #define _IMX_REGS_H
>  
> +#include <asm/arch/regs-rtc.h>
> +
>  #ifndef __ASSEMBLY__
>  
>  extern void imx_gpio_mode (int gpio_mode);
> @@ -224,6 +226,7 @@ struct fuse_bank0_regs {
>  #define IMX_TIM1_BASE		(0x03000 + IMX_IO_BASE)
>  #define IMX_TIM2_BASE		(0x04000 + IMX_IO_BASE)
>  #define IMX_TIM3_BASE		(0x05000 + IMX_IO_BASE)
> +#define IMX_RTC_BASE		(0x07000 + IMX_IO_BASE)
>  #define UART1_BASE		(0x0a000 + IMX_IO_BASE)
>  #define UART2_BASE		(0x0b000 + IMX_IO_BASE)
>  #define UART3_BASE		(0x0c000 + IMX_IO_BASE)
> diff --git a/arch/arm/include/asm/arch-mx27/regs-rtc.h b/arch/arm/include/asm/arch-mx27/regs-rtc.h
> new file mode 100644
> index 0000000..4f92d0f
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-mx27/regs-rtc.h
> @@ -0,0 +1,40 @@
> +/*
> + * Freescale i.MX27 RTC Register Definitions
> + *
> + * Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
> + *
> + */
> +
> +#ifndef __MX27_REGS_RTC_H__
> +#define __MX27_REGS_RTC_H__
> +
> +#ifndef	__ASSEMBLY__
> +struct rtc_regs {
> +	u32 hourmin;
> +	u32 seconds;
> +	u32 alrm_hm;
> +	u32 alrm_sec;
> +	u32 rtcctl;
> +	u32 rtcisr;
> +	u32 rtcienr;
> +	u32 stpwch;
> +	u32 dayr;
> +	u32 dayalarm;
> +};
> +#endif /* __ASSEMBLY__*/
> +
> +#endif	/* __MX28_REGS_RTC_H__ */
> diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
> index faf4fcd..640f148 100644
> --- a/drivers/rtc/Makefile
> +++ b/drivers/rtc/Makefile
> @@ -57,6 +57,7 @@ COBJS-$(CONFIG_RTC_MK48T59) += mk48t59.o
>  COBJS-$(CONFIG_RTC_MPC5200) += mpc5xxx.o
>  COBJS-$(CONFIG_RTC_MPC8xx) += mpc8xx.o
>  COBJS-$(CONFIG_RTC_MV) += mvrtc.o
> +COBJS-$(CONFIG_RTC_MX27) += mx27rtc.o
>  COBJS-$(CONFIG_RTC_MXS) += mxsrtc.o
>  COBJS-$(CONFIG_RTC_PCF8563) += pcf8563.o
>  COBJS-$(CONFIG_RTC_PL031) += pl031.o
> diff --git a/drivers/rtc/mx27rtc.c b/drivers/rtc/mx27rtc.c
> new file mode 100644
> index 0000000..7628dec
> --- /dev/null
> +++ b/drivers/rtc/mx27rtc.c
> @@ -0,0 +1,83 @@
> +/*
> + * Freescale i.MX27 RTC Driver
> + *
> + * Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
> + *
> + */
> +
> +#include <common.h>
> +#include <rtc.h>
> +#include <asm/io.h>
> +#include <asm/arch/imx-regs.h>
> +
> +#define HOUR_SHIFT 8
> +#define HOUR_MASK  0x1f
> +#define MIN_SHIFT  0
> +#define MIN_MASK   0x3f
> +
> +int rtc_get(struct rtc_time *time)
> +{
> +	struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
> +	uint32_t day, hour, min, sec;
> +
> +	day  = readl(&rtc_regs->dayr);
> +	hour = readl(&rtc_regs->hourmin);
> +	sec  = readl(&rtc_regs->seconds);
> +
> +	min  = (hour >> MIN_SHIFT) & MIN_MASK;
> +	hour = (hour >> HOUR_SHIFT) & HOUR_MASK;
> +
> +	sec += min * 60 + hour * 3600 + day * 24 * 3600;
> +
> +	to_tm(sec, time);
> +
> +	return 0;
> +}
> +
> +int rtc_set(struct rtc_time *time)
> +{
> +	struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
> +	uint32_t day, hour, min, sec;
> +
> +	sec = mktime(time->tm_year, time->tm_mon, time->tm_mday,
> +		time->tm_hour, time->tm_min, time->tm_sec);
> +
> +	day  = sec / (24 * 3600);
> +	sec  = sec % (24 * 3600);
> +	hour = sec / 3600;
> +	sec  = sec % 3600;
> +	min  = sec / 60;
> +	sec  = sec % 60;
> +
> +	hour  = (hour & HOUR_MASK) << HOUR_SHIFT;
> +	hour |= (min & MIN_MASK) << MIN_SHIFT;
> +
> +	writel(day, &rtc_regs->dayr);
> +	writel(hour, &rtc_regs->hourmin);
> +	writel(sec, &rtc_regs->seconds);
> +
> +	return 0;
> +}
> +
> +void rtc_reset(void)
> +{
> +	struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
> +
> +	writel(0, &rtc_regs->dayr);
> +	writel(0, &rtc_regs->hourmin);
> +	writel(0, &rtc_regs->seconds);
> +}
> 

It looks good.

Acked-by: Stefano Babic <sbabic@denx.de>

Best regards.
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================