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Message-ID: <20090812113913.GE17992@pengutronix.de>
Date: Wed, 12 Aug 2009 13:39:13 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: Alessandro Zummo <alessandro.zummo@...ertech.it>
Cc: linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.arm.linux.org.uk,
Paul Gortmaker <p_gortmaker@...oo.com>,
rtc-linux@...glegroups.com
Subject: Re: [PATCH 4/5] [RTC] Add Freescale MC13783 RTC driver
Hi Allessandro,
I addressed your comments. Will be fixed next round.
Thanks for reviewing,
Sascha
On Wed, Aug 12, 2009 at 11:41:34AM +0200, Alessandro Zummo wrote:
> On Tue, 11 Aug 2009 10:59:25 +0200
> Sascha Hauer <s.hauer@...gutronix.de> wrote:
>
> > This driver provides support for the RTC part integrated into
> > the Freescale MC13783 PMIC.
> >
> > Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> > Cc: Paul Gortmaker <p_gortmaker@...oo.com>
> > Cc: Alessandro Zummo <a.zummo@...ertech.it>
> > Cc: rtc-linux@...glegroups.com
>
>
> thanks for your submission, comments below
>
> > ---
> > drivers/rtc/Kconfig | 6 ++
> > drivers/rtc/Makefile | 1 +
> > drivers/rtc/rtc-mc13783.c | 141 +++++++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 148 insertions(+), 0 deletions(-)
> > create mode 100644 drivers/rtc/rtc-mc13783.c
> >
> > diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> > index 81adbdb..e4a242f 100644
> > --- a/drivers/rtc/Kconfig
> > +++ b/drivers/rtc/Kconfig
> > @@ -759,4 +759,10 @@ config RTC_DRV_PS3
> > This driver can also be built as a module. If so, the module
> > will be called rtc-ps3.
> >
> > +config RTC_DRV_MC13783
> > + depends on MFD_MC13783
> > + tristate "Freescale MC13783 RTC"
> > + help
> > + This enables support for the Freescale MC13783 PMIC RTC
> > +
> > endif # RTC_CLASS
> > diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
> > index 3c0f2b2..00bf66d 100644
> > --- a/drivers/rtc/Makefile
> > +++ b/drivers/rtc/Makefile
> > @@ -78,3 +78,4 @@ obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o
> > obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
> > obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o
> > obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o
> > +obj-$(CONFIG_RTC_DRV_MC13783) += rtc-mc13783.o
>
> keep in in alphabetic order.
>
> > diff --git a/drivers/rtc/rtc-mc13783.c b/drivers/rtc/rtc-mc13783.c
> > new file mode 100644
> > index 0000000..d1f1192
> > --- /dev/null
> > +++ b/drivers/rtc/rtc-mc13783.c
> > @@ -0,0 +1,141 @@
> > +/*
> > + * Real Time Clock driver for Freescale MC13783 PMIC
> > + *
> > + * (C) 2009 Sascha Hauer, Pengutronix
> > + *
> > + * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> > + */
> > +
> > +#include <linux/mfd/mc13783-private.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/ioctl.h>
> > +#include <linux/time.h>
> > +#include <linux/rtc.h>
>
> too many includes?
>
> > +
> > +struct mc13783_rtc {
> > + struct rtc_device *rtc;
> > + struct mc13783 *mc13783;
> > +};
> > +
> > +static int mc13783_rtc_set_time(struct device *dev, struct rtc_time *tm)
>
> please implement set_mmss instad of set_time
>
> > + struct mc13783_rtc *priv = dev_get_drvdata(dev);
> > + unsigned int seconds, days;
> > + unsigned long s1970;
> > +
> > + rtc_tm_to_time(tm, &s1970);
> > +
> > + seconds = s1970 % 86400;
> > + days = s1970 / 86400;
> > +
> > + mc13783_reg_write(priv->mc13783, MC13783_REG_RTC_TIME, seconds);
> > + mc13783_reg_write(priv->mc13783, MC13783_REG_RTC_DAY, days);
> > +
> > + return 0;
> > +}
> > +
> > +static int mc13783_rtc_read_time(struct device *dev, struct rtc_time *tm)
> > +{
> > + struct mc13783_rtc *priv = dev_get_drvdata(dev);
> > + unsigned int seconds, days1, days2;
> > + unsigned long s1970;
> > +
> > + rtc_tm_to_time(tm, &s1970);
> > +
> > + do {
> > + mc13783_reg_read(priv->mc13783, MC13783_REG_RTC_TIME, &seconds);
> > + mc13783_reg_read(priv->mc13783, MC13783_REG_RTC_DAY, &days1);
> > + mc13783_reg_read(priv->mc13783, MC13783_REG_RTC_DAY, &days2);
> > + } while (days1 != days2);
> > +
> > + s1970 = days1 * 86400 + seconds;
> > +
> > + rtc_time_to_tm(s1970, tm);
> > +
> > + return 0;
>
> use rtc_valid_tm
>
> > +}
> > +
> > +static const struct rtc_class_ops mc13783_rtc_ops = {
> > + .read_time = mc13783_rtc_read_time,
> > + .set_time = mc13783_rtc_set_time,
> > +};
> > +
> > +static int mc13783_rtc_probe(struct platform_device *pdev)
> > +{
> > + int err;
> > + struct mc13783_rtc *priv;
> > +
> > + priv = kzalloc(sizeof *priv, GFP_KERNEL);
> > + if (!priv)
> > + return -ENOMEM;
> > +
> > + priv->mc13783 = pdev->dev.platform_data;
> > + platform_set_drvdata(pdev, priv);
> > +
> > + priv->rtc = rtc_device_register(pdev->name,
> > + &pdev->dev, &mc13783_rtc_ops, THIS_MODULE);
> > +
> > + if (IS_ERR(priv->rtc)) {
> > + err = PTR_ERR(priv->rtc);
> > + goto exit_kfree;
> > + }
> > +
> > + return 0;
> > +
> > +exit_kfree:
> > + kfree(priv);
> > + return err;
> > +}
> > +
> > +static int __exit mc13783_rtc_remove(struct platform_device *pdev)
> > +{
> > + struct mc13783_rtc *priv = platform_get_drvdata(pdev);
> > +
> > + rtc_device_unregister(priv->rtc);
> > + platform_set_drvdata(pdev, NULL);
> > +
> > + kfree(priv);
> > +
> > + return 0;
> > +}
> > +
> > +static struct platform_driver mc13783_rtc_driver = {
> > + .probe = mc13783_rtc_probe,
> > + .remove = __exit_p(mc13783_rtc_remove),
> > + .driver = {
> > + .name = "mc13783-rtc",
> > + .owner = THIS_MODULE,
> > + },
> > +};
> > +
> > +static int __init mc13783_rtc_init(void)
> > +{
> > + return platform_driver_register(&mc13783_rtc_driver);
>
> can you use platform_driver_probe?
>
> > +}
> > +module_init(mc13783_rtc_init);
> > +
> > +static void __exit mc13783_rtc_exit(void)
> > +{
> > + platform_driver_unregister(&mc13783_rtc_driver);
> > +}
> > +module_exit(mc13783_rtc_exit);
> > +
> > +
> > +MODULE_AUTHOR("Sascha Hauer");
>
> email here please.
>
> > +MODULE_DESCRIPTION("RTC driver for Freescale MC13783 PMIC");
> > +MODULE_LICENSE("GPL");
> > --
> > 1.6.3.3
> >
>
>
> --
>
> Best regards,
>
> Alessandro Zummo,
> Tower Technologies - Torino, Italy
>
> http://www.towertech.it
>
>
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