Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 284 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
new file mode 100644
index 00000000..10287865
--- /dev/null
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -0,0 +1,284 @@
+/*
+ * Freescale STMP37XX/STMP378X Real Time Clock driver
+ *
+ * Copyright (c) 2007 Sigmatel, Inc.
+ * Peter Hartley, <peter.hartley@sigmatel.com>
+ *
+ * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
+ * Copyright 2011 Wolfram Sang, Pengutronix e.K.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/rtc.h>
+#include <linux/slab.h>
+
+#include <mach/common.h>
+
+#define STMP3XXX_RTC_CTRL			0x0
+#define STMP3XXX_RTC_CTRL_SET			0x4
+#define STMP3XXX_RTC_CTRL_CLR			0x8
+#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN		0x00000001
+#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN	0x00000002
+#define STMP3XXX_RTC_CTRL_ALARM_IRQ		0x00000004
+
+#define STMP3XXX_RTC_STAT			0x10
+#define STMP3XXX_RTC_STAT_STALE_SHIFT		16
+#define STMP3XXX_RTC_STAT_RTC_PRESENT		0x80000000
+
+#define STMP3XXX_RTC_SECONDS			0x30
+
+#define STMP3XXX_RTC_ALARM			0x40
+
+#define STMP3XXX_RTC_PERSISTENT0		0x60
+#define STMP3XXX_RTC_PERSISTENT0_SET		0x64
+#define STMP3XXX_RTC_PERSISTENT0_CLR		0x68
+#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN	0x00000002
+#define STMP3XXX_RTC_PERSISTENT0_ALARM_EN	0x00000004
+#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE	0x00000080
+
+struct stmp3xxx_rtc_data {
+	struct rtc_device *rtc;
+	void __iomem *io;
+	int irq_alarm;
+};
+
+static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
+{
+	/*
+	 * The datasheet doesn't say which way round the
+	 * NEW_REGS/STALE_REGS bitfields go. In fact it's 0x1=P0,
+	 * 0x2=P1, .., 0x20=P5, 0x40=ALARM, 0x80=SECONDS
+	 */
+	while (readl(rtc_data->io + STMP3XXX_RTC_STAT) &
+			(0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT))
+		cpu_relax();
+}
+
+/* Time read/write */
+static int stmp3xxx_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
+{
+	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
+
+	stmp3xxx_wait_time(rtc_data);
+	rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm);
+	return 0;
+}
+
+static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
+{
+	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
+
+	writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS);
+	stmp3xxx_wait_time(rtc_data);
+	return 0;
+}
+
+/* interrupt(s) handler */
+static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
+{
+	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev_id);
+	u32 status = readl(rtc_data->io + STMP3XXX_RTC_CTRL);
+
+	if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
+		writel(STMP3XXX_RTC_CTRL_ALARM_IRQ,
+				rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
+		rtc_update_irq(rtc_data->rtc, 1, RTC_AF | RTC_IRQF);
+		return IRQ_HANDLED;
+	}
+
+	return IRQ_NONE;
+}
+
+static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
+
+	if (enabled) {
+		writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+				STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
+				rtc_data->io + STMP3XXX_RTC_PERSISTENT0_SET);
+		writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+				rtc_data->io + STMP3XXX_RTC_CTRL_SET);
+	} else {
+		writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+				STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
+				rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
+		writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+				rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
+	}
+	return 0;
+}
+
+static int stmp3xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
+
+	rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time);
+	return 0;
+}
+
+static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+	unsigned long t;
+	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
+
+	rtc_tm_to_time(&alm->time, &t);
+	writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);
+
+	stmp3xxx_alarm_irq_enable(dev, alm->enabled);
+
+	return 0;
+}
+
+static struct rtc_class_ops stmp3xxx_rtc_ops = {
+	.alarm_irq_enable =
+			  stmp3xxx_alarm_irq_enable,
+	.read_time	= stmp3xxx_rtc_gettime,
+	.set_mmss	= stmp3xxx_rtc_set_mmss,
+	.read_alarm	= stmp3xxx_rtc_read_alarm,
+	.set_alarm	= stmp3xxx_rtc_set_alarm,
+};
+
+static int stmp3xxx_rtc_remove(struct platform_device *pdev)
+{
+	struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(pdev);
+
+	if (!rtc_data)
+		return 0;
+
+	writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+			rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
+	free_irq(rtc_data->irq_alarm, &pdev->dev);
+	rtc_device_unregister(rtc_data->rtc);
+	platform_set_drvdata(pdev, NULL);
+	iounmap(rtc_data->io);
+	kfree(rtc_data);
+
+	return 0;
+}
+
+static int stmp3xxx_rtc_probe(struct platform_device *pdev)
+{
+	struct stmp3xxx_rtc_data *rtc_data;
+	struct resource *r;
+	int err;
+
+	rtc_data = kzalloc(sizeof *rtc_data, GFP_KERNEL);
+	if (!rtc_data)
+		return -ENOMEM;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!r) {
+		dev_err(&pdev->dev, "failed to get resource\n");
+		err = -ENXIO;
+		goto out_free;
+	}
+
+	rtc_data->io = ioremap(r->start, resource_size(r));
+	if (!rtc_data->io) {
+		dev_err(&pdev->dev, "ioremap failed\n");
+		err = -EIO;
+		goto out_free;
+	}
+
+	rtc_data->irq_alarm = platform_get_irq(pdev, 0);
+
+	if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) &
+			STMP3XXX_RTC_STAT_RTC_PRESENT)) {
+		dev_err(&pdev->dev, "no device onboard\n");
+		err = -ENODEV;
+		goto out_remap;
+	}
+
+	platform_set_drvdata(pdev, rtc_data);
+
+	mxs_reset_block(rtc_data->io);
+	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
+			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
+			rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
+
+	writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN |
+			STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+			rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
+
+	rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
+				&stmp3xxx_rtc_ops, THIS_MODULE);
+	if (IS_ERR(rtc_data->rtc)) {
+		err = PTR_ERR(rtc_data->rtc);
+		goto out_remap;
+	}
+
+	err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, 0,
+			"RTC alarm", &pdev->dev);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
+			rtc_data->irq_alarm);
+		goto out_irq_alarm;
+	}
+
+	return 0;
+
+out_irq_alarm:
+	rtc_device_unregister(rtc_data->rtc);
+out_remap:
+	platform_set_drvdata(pdev, NULL);
+	iounmap(rtc_data->io);
+out_free:
+	kfree(rtc_data);
+	return err;
+}
+
+#ifdef CONFIG_PM
+static int stmp3xxx_rtc_suspend(struct platform_device *dev, pm_message_t state)
+{
+	return 0;
+}
+
+static int stmp3xxx_rtc_resume(struct platform_device *dev)
+{
+	struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);
+
+	mxs_reset_block(rtc_data->io);
+	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
+			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
+			rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
+	return 0;
+}
+#else
+#define stmp3xxx_rtc_suspend	NULL
+#define stmp3xxx_rtc_resume	NULL
+#endif
+
+static struct platform_driver stmp3xxx_rtcdrv = {
+	.probe		= stmp3xxx_rtc_probe,
+	.remove		= stmp3xxx_rtc_remove,
+	.suspend	= stmp3xxx_rtc_suspend,
+	.resume		= stmp3xxx_rtc_resume,
+	.driver		= {
+		.name	= "stmp3xxx-rtc",
+		.owner	= THIS_MODULE,
+	},
+};
+
+module_platform_driver(stmp3xxx_rtcdrv);
+
+MODULE_DESCRIPTION("STMP3xxx RTC Driver");
+MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com> and "
+		"Wolfram Sang <w.sang@pengutronix.de>");
+MODULE_LICENSE("GPL");