From: Sascha Hauer <s.hauer@pengutronix.de>
To: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.arm.linux.org.uk,
Sascha Hauer <s.hauer@pengutronix.de>,
Paul Gortmaker <p_gortmaker@yahoo.com>,
Alessandro Zummo <a.zummo@towertech.it>,
rtc-linux@googlegroups.com
Subject: [PATCH 4/5] [RTC] Add Freescale MC13783 RTC driver
Date: Tue, 11 Aug 2009 11:07:46 +0200 [thread overview]
Message-ID: <1249981667-4366-5-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1249981667-4366-4-git-send-email-s.hauer@pengutronix.de>
This driver provides support for the RTC part integrated into
the Freescale MC13783 PMIC.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: rtc-linux@googlegroups.com
---
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
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>
+
+struct mc13783_rtc {
+ struct rtc_device *rtc;
+ struct mc13783 *mc13783;
+};
+
+static int mc13783_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ 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;
+}
+
+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);
+}
+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");
+MODULE_DESCRIPTION("RTC driver for Freescale MC13783 PMIC");
+MODULE_LICENSE("GPL");
--
1.6.3.3
next prev parent reply other threads:[~2009-08-11 12:44 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-11 9:07 [RFC] Freescale MC13783 PMIC support Sascha Hauer
2009-08-11 9:07 ` [PATCH 1/5] drivers/mfd: Add Freescale MC13783 driver Sascha Hauer
2009-08-11 9:07 ` [PATCH 2/5] [input] add mc13783 touchscreen driver Sascha Hauer
2009-08-11 9:07 ` [PATCH 3/5] [hwmon] add Freescale MC13783 adc driver Sascha Hauer
2009-08-11 9:07 ` Sascha Hauer [this message]
2009-08-11 9:07 ` [PATCH 5/5] [regulator] Add a Freescale MC13783 regulator driver Sascha Hauer
2009-08-11 10:19 ` Mark Brown
2009-08-12 2:15 ` [PATCH 2/5] [input] add mc13783 touchscreen driver Dmitry Torokhov
2009-08-12 11:10 ` Sascha Hauer
2009-08-12 11:16 ` Mark Brown
2009-08-12 11:34 ` Sascha Hauer
2009-08-12 16:01 ` Dmitry Torokhov
2009-08-11 10:12 ` [PATCH 1/5] drivers/mfd: Add Freescale MC13783 driver Mark Brown
2009-08-11 11:38 ` Sascha Hauer
2009-08-11 10:15 ` Mark Brown
2009-08-11 12:05 ` [RFC] Freescale MC13783 PMIC support Antonio Ospite
2009-08-11 12:28 ` Mark Brown
2009-08-15 1:17 ` Daniel Ribeiro
2009-08-11 13:57 ` Sascha Hauer
-- strict thread matches above, loose matches on Subject: below --
2009-08-12 15:05 [PATCH V2] " Sascha Hauer
2009-08-12 15:05 ` [PATCH 1/5] drivers/mfd: Add Freescale MC13783 driver Sascha Hauer
2009-08-12 15:05 ` [PATCH 2/5] [input] add mc13783 touchscreen driver Sascha Hauer
2009-08-12 15:05 ` [PATCH 3/5] [hwmon] add Freescale MC13783 adc driver Sascha Hauer
2009-08-12 15:05 ` [PATCH 4/5] [RTC] Add Freescale MC13783 RTC driver Sascha Hauer
[not found] <1249981166-4210-1-git-send-email-s.hauer@pengutronix.de>
2009-08-11 8:59 ` [PATCH 2/5] [input] add mc13783 touchscreen driver Sascha Hauer
2009-08-11 8:59 ` [PATCH 3/5] [hwmon] add Freescale MC13783 adc driver Sascha Hauer
2009-08-11 8:59 ` [PATCH 4/5] [RTC] Add Freescale MC13783 RTC driver Sascha Hauer
2009-08-12 9:41 ` Alessandro Zummo
2009-08-12 11:39 ` Sascha Hauer
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