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path: root/drivers/rtc/rtc-mc13783.c
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Diffstat (limited to 'drivers/rtc/rtc-mc13783.c')
-rw-r--r--drivers/rtc/rtc-mc13783.c428
1 files changed, 0 insertions, 428 deletions
diff --git a/drivers/rtc/rtc-mc13783.c b/drivers/rtc/rtc-mc13783.c
deleted file mode 100644
index 675bfb51536..00000000000
--- a/drivers/rtc/rtc-mc13783.c
+++ /dev/null
@@ -1,428 +0,0 @@
-/*
- * Real Time Clock driver for Freescale MC13783 PMIC
- *
- * (C) 2009 Sascha Hauer, Pengutronix
- * (C) 2009 Uwe Kleine-Koenig, Pengutronix
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/mfd/mc13783.h>
-#include <linux/platform_device.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/rtc.h>
-
-#define DRIVER_NAME "mc13783-rtc"
-
-#define MC13783_RTCTOD 20
-#define MC13783_RTCTODA 21
-#define MC13783_RTCDAY 22
-#define MC13783_RTCDAYA 23
-
-struct mc13783_rtc {
- struct rtc_device *rtc;
- struct mc13783 *mc13783;
- int valid;
-};
-
-static int mc13783_rtc_irq_enable_unlocked(struct device *dev,
- unsigned int enabled, int irq)
-{
- struct mc13783_rtc *priv = dev_get_drvdata(dev);
- int (*func)(struct mc13783 *mc13783, int irq);
-
- if (!priv->valid)
- return -ENODATA;
-
- func = enabled ? mc13783_irq_unmask : mc13783_irq_mask;
- return func(priv->mc13783, irq);
-}
-
-static int mc13783_rtc_irq_enable(struct device *dev,
- unsigned int enabled, int irq)
-{
- struct mc13783_rtc *priv = dev_get_drvdata(dev);
- int ret;
-
- mc13783_lock(priv->mc13783);
-
- ret = mc13783_rtc_irq_enable_unlocked(dev, enabled, irq);
-
- mc13783_unlock(priv->mc13783);
-
- return ret;
-}
-
-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;
- int ret;
-
- mc13783_lock(priv->mc13783);
-
- if (!priv->valid) {
- ret = -ENODATA;
- goto out;
- }
-
- ret = mc13783_reg_read(priv->mc13783, MC13783_RTCDAY, &days1);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_reg_read(priv->mc13783, MC13783_RTCTOD, &seconds);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_reg_read(priv->mc13783, MC13783_RTCDAY, &days2);
-out:
- mc13783_unlock(priv->mc13783);
-
- if (ret)
- return ret;
-
- if (days2 == days1 + 1) {
- if (seconds >= 86400 / 2)
- days2 = days1;
- else
- days1 = days2;
- }
-
- if (days1 != days2)
- return -EIO;
-
- s1970 = days1 * 86400 + seconds;
-
- rtc_time_to_tm(s1970, tm);
-
- return rtc_valid_tm(tm);
-}
-
-static int mc13783_rtc_set_mmss(struct device *dev, unsigned long secs)
-{
- struct mc13783_rtc *priv = dev_get_drvdata(dev);
- unsigned int seconds, days;
- unsigned int alarmseconds;
- int ret;
-
- seconds = secs % 86400;
- days = secs / 86400;
-
- mc13783_lock(priv->mc13783);
-
- /*
- * temporarily invalidate alarm to prevent triggering it when the day is
- * already updated while the time isn't yet.
- */
- ret = mc13783_reg_read(priv->mc13783, MC13783_RTCTODA, &alarmseconds);
- if (unlikely(ret))
- goto out;
-
- if (alarmseconds < 86400) {
- ret = mc13783_reg_write(priv->mc13783,
- MC13783_RTCTODA, 0x1ffff);
- if (unlikely(ret))
- goto out;
- }
-
- /*
- * write seconds=0 to prevent a day switch between writing days
- * and seconds below
- */
- ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTOD, 0);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_reg_write(priv->mc13783, MC13783_RTCDAY, days);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTOD, seconds);
- if (unlikely(ret))
- goto out;
-
- /* restore alarm */
- if (alarmseconds < 86400) {
- ret = mc13783_reg_write(priv->mc13783,
- MC13783_RTCTODA, alarmseconds);
- if (unlikely(ret))
- goto out;
- }
-
- ret = mc13783_irq_ack(priv->mc13783, MC13783_IRQ_RTCRST);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_irq_unmask(priv->mc13783, MC13783_IRQ_RTCRST);
-out:
- priv->valid = !ret;
-
- mc13783_unlock(priv->mc13783);
-
- return ret;
-}
-
-static int mc13783_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
-{
- struct mc13783_rtc *priv = dev_get_drvdata(dev);
- unsigned seconds, days;
- unsigned long s1970;
- int enabled, pending;
- int ret;
-
- mc13783_lock(priv->mc13783);
-
- ret = mc13783_reg_read(priv->mc13783, MC13783_RTCTODA, &seconds);
- if (unlikely(ret))
- goto out;
- if (seconds >= 86400) {
- ret = -ENODATA;
- goto out;
- }
-
- ret = mc13783_reg_read(priv->mc13783, MC13783_RTCDAY, &days);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_irq_status(priv->mc13783, MC13783_IRQ_TODA,
- &enabled, &pending);
-
-out:
- mc13783_unlock(priv->mc13783);
-
- if (ret)
- return ret;
-
- alarm->enabled = enabled;
- alarm->pending = pending;
-
- s1970 = days * 86400 + seconds;
-
- rtc_time_to_tm(s1970, &alarm->time);
- dev_dbg(dev, "%s: %lu\n", __func__, s1970);
-
- return 0;
-}
-
-static int mc13783_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
-{
- struct mc13783_rtc *priv = dev_get_drvdata(dev);
- unsigned long s1970;
- unsigned seconds, days;
- int ret;
-
- mc13783_lock(priv->mc13783);
-
- /* disable alarm to prevent false triggering */
- ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTODA, 0x1ffff);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_irq_ack(priv->mc13783, MC13783_IRQ_TODA);
- if (unlikely(ret))
- goto out;
-
- ret = rtc_tm_to_time(&alarm->time, &s1970);
- if (unlikely(ret))
- goto out;
-
- dev_dbg(dev, "%s: o%2.s %lu\n", __func__, alarm->enabled ? "n" : "ff",
- s1970);
-
- ret = mc13783_rtc_irq_enable_unlocked(dev, alarm->enabled,
- MC13783_IRQ_TODA);
- if (unlikely(ret))
- goto out;
-
- seconds = s1970 % 86400;
- days = s1970 / 86400;
-
- ret = mc13783_reg_write(priv->mc13783, MC13783_RTCDAYA, days);
- if (unlikely(ret))
- goto out;
-
- ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTODA, seconds);
-
-out:
- mc13783_unlock(priv->mc13783);
-
- return ret;
-}
-
-static irqreturn_t mc13783_rtc_alarm_handler(int irq, void *dev)
-{
- struct mc13783_rtc *priv = dev;
- struct mc13783 *mc13783 = priv->mc13783;
-
- dev_dbg(&priv->rtc->dev, "Alarm\n");
-
- rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
-
- mc13783_irq_ack(mc13783, irq);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t mc13783_rtc_update_handler(int irq, void *dev)
-{
- struct mc13783_rtc *priv = dev;
- struct mc13783 *mc13783 = priv->mc13783;
-
- dev_dbg(&priv->rtc->dev, "1HZ\n");
-
- rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_UF);
-
- mc13783_irq_ack(mc13783, irq);
-
- return IRQ_HANDLED;
-}
-
-static int mc13783_rtc_update_irq_enable(struct device *dev,
- unsigned int enabled)
-{
- return mc13783_rtc_irq_enable(dev, enabled, MC13783_IRQ_1HZ);
-}
-
-static int mc13783_rtc_alarm_irq_enable(struct device *dev,
- unsigned int enabled)
-{
- return mc13783_rtc_irq_enable(dev, enabled, MC13783_IRQ_TODA);
-}
-
-static const struct rtc_class_ops mc13783_rtc_ops = {
- .read_time = mc13783_rtc_read_time,
- .set_mmss = mc13783_rtc_set_mmss,
- .read_alarm = mc13783_rtc_read_alarm,
- .set_alarm = mc13783_rtc_set_alarm,
- .alarm_irq_enable = mc13783_rtc_alarm_irq_enable,
- .update_irq_enable = mc13783_rtc_update_irq_enable,
-};
-
-static irqreturn_t mc13783_rtc_reset_handler(int irq, void *dev)
-{
- struct mc13783_rtc *priv = dev;
- struct mc13783 *mc13783 = priv->mc13783;
-
- dev_dbg(&priv->rtc->dev, "RTCRST\n");
- priv->valid = 0;
-
- mc13783_irq_mask(mc13783, irq);
-
- return IRQ_HANDLED;
-}
-
-static int __devinit mc13783_rtc_probe(struct platform_device *pdev)
-{
- int ret;
- struct mc13783_rtc *priv;
- struct mc13783 *mc13783;
- int rtcrst_pending;
-
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- mc13783 = dev_get_drvdata(pdev->dev.parent);
- priv->mc13783 = mc13783;
-
- platform_set_drvdata(pdev, priv);
-
- mc13783_lock(mc13783);
-
- ret = mc13783_irq_request(mc13783, MC13783_IRQ_RTCRST,
- mc13783_rtc_reset_handler, DRIVER_NAME, priv);
- if (ret)
- goto err_reset_irq_request;
-
- ret = mc13783_irq_status(mc13783, MC13783_IRQ_RTCRST,
- NULL, &rtcrst_pending);
- if (ret)
- goto err_reset_irq_status;
-
- priv->valid = !rtcrst_pending;
-
- ret = mc13783_irq_request_nounmask(mc13783, MC13783_IRQ_1HZ,
- mc13783_rtc_update_handler, DRIVER_NAME, priv);
- if (ret)
- goto err_update_irq_request;
-
- ret = mc13783_irq_request_nounmask(mc13783, MC13783_IRQ_TODA,
- mc13783_rtc_alarm_handler, DRIVER_NAME, priv);
- if (ret)
- goto err_alarm_irq_request;
-
- priv->rtc = rtc_device_register(pdev->name,
- &pdev->dev, &mc13783_rtc_ops, THIS_MODULE);
- if (IS_ERR(priv->rtc)) {
- ret = PTR_ERR(priv->rtc);
-
- mc13783_irq_free(mc13783, MC13783_IRQ_TODA, priv);
-err_alarm_irq_request:
-
- mc13783_irq_free(mc13783, MC13783_IRQ_1HZ, priv);
-err_update_irq_request:
-
-err_reset_irq_status:
-
- mc13783_irq_free(mc13783, MC13783_IRQ_RTCRST, priv);
-err_reset_irq_request:
-
- platform_set_drvdata(pdev, NULL);
- kfree(priv);
- }
-
- mc13783_unlock(mc13783);
-
- return ret;
-}
-
-static int __devexit mc13783_rtc_remove(struct platform_device *pdev)
-{
- struct mc13783_rtc *priv = platform_get_drvdata(pdev);
-
- mc13783_lock(priv->mc13783);
-
- rtc_device_unregister(priv->rtc);
-
- mc13783_irq_free(priv->mc13783, MC13783_IRQ_TODA, priv);
- mc13783_irq_free(priv->mc13783, MC13783_IRQ_1HZ, priv);
- mc13783_irq_free(priv->mc13783, MC13783_IRQ_RTCRST, priv);
-
- mc13783_unlock(priv->mc13783);
-
- platform_set_drvdata(pdev, NULL);
-
- kfree(priv);
-
- return 0;
-}
-
-static struct platform_driver mc13783_rtc_driver = {
- .remove = __devexit_p(mc13783_rtc_remove),
- .driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init mc13783_rtc_init(void)
-{
- return platform_driver_probe(&mc13783_rtc_driver, &mc13783_rtc_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 <s.hauer@pengutronix.de>");
-MODULE_DESCRIPTION("RTC driver for Freescale MC13783 PMIC");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRIVER_NAME);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 18:58:20 +0000