--- /dev/null
+From 6462d09dad154b69ea6180c0acb2d009627ff1be Mon Sep 17 00:00:00 2001
+From: Alison Wang <b18965@freescale.com>
+Date: Thu, 4 Aug 2011 09:59:46 +0800
+Subject: [PATCH 27/52] Add RTC driver support on MCF5441x platform
+
+Support on-chip robust-RTC module on MCF5441x platform.
+
+Signed-off-by: Alison Wang <b18965@freescale.com>
+---
+ drivers/rtc/Kconfig | 9 +
+ drivers/rtc/Makefile | 1 +
+ drivers/rtc/rtc-m5441x.c | 638 ++++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 648 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/rtc/rtc-m5441x.c
+
+--- a/drivers/rtc/Kconfig
++++ b/drivers/rtc/Kconfig
+@@ -928,6 +928,15 @@ config RTC_MCF
+
+ If you build it as a module it will be call mcf-rtc.
+
++config RTC_M5441X
++ tristate "Freescale Coldfire M5441X platform Real Time Clock"
++ depends on COLDFIRE
++ help
++ If you say yes here you will get support for the on-chip Coldfire
++ Real-Time Clock for mcf5441x platform.
++
++ If you build it as a module it will be call rtc-m5441x.
++
+ config RTC_DRV_PS3
+ tristate "PS3 RTC"
+ depends on PPC_PS3
+--- a/drivers/rtc/Makefile
++++ b/drivers/rtc/Makefile
+@@ -103,3 +103,4 @@ obj-$(CONFIG_RTC_DRV_WM831X) += rtc-wm83
+ obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o
+ obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
+ obj-$(CONFIG_RTC_MCF) += rtc-mcf.o
++obj-$(CONFIG_RTC_M5441X) += rtc-m5441x.o
+--- /dev/null
++++ b/drivers/rtc/rtc-m5441x.c
+@@ -0,0 +1,638 @@
++/*
++ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
++ *
++ * Lanttor.Guo@freescale.com
++ *
++ * 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
++ */
++
++/*
++ * Implementation based on rtc-mcf.c
++ */
++
++/*
++ * RTC Real Time Clock (RTC) Driver
++ *
++ * @file rtc-m5441x.c
++ * @brief Real Time Clock interface
++ *
++ * This file contains Real Time Clock interface for Linux.
++ *
++ */
++#include <linux/rtc.h>
++#include <linux/module.h>
++#include <linux/fs.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/platform_device.h>
++#include <linux/clk.h>
++#include <linux/uaccess.h>
++#include <asm/mcfsim.h>
++#include <linux/slab.h>
++#include <linux/io.h>
++
++#ifdef readw
++#undef readw
++#endif
++
++#ifdef writew
++#undef writew
++#endif
++
++#define readw(addr) in_be16(addr)
++#define writew(val, addr) out_be16((addr), (val))
++
++
++#define PIT_ALL_ON (MCF_RTC_ISR_2HZ | MCF_RTC_ISR_SAM0 | MCF_RTC_ISR_SAM1 | \
++ MCF_RTC_ISR_SAM2 | MCF_RTC_ISR_SAM3 | MCF_RTC_ISR_SAM4 | \
++ MCF_RTC_ISR_SAM5 | MCF_RTC_ISR_SAM6 | MCF_RTC_ISR_SAM7)
++
++#define MAX_PIE_NUM 9
++#define MAX_PIE_FREQ 512
++const u32 PIE_BIT_DEF[MAX_PIE_NUM][2] = {
++ {2, MCF_RTC_ISR_2HZ},
++ {4, MCF_RTC_ISR_SAM0},
++ {8, MCF_RTC_ISR_SAM1},
++ {16, MCF_RTC_ISR_SAM2},
++ {32, MCF_RTC_ISR_SAM3},
++ {64, MCF_RTC_ISR_SAM4},
++ {128, MCF_RTC_ISR_SAM5},
++ {256, MCF_RTC_ISR_SAM6},
++ {MAX_PIE_FREQ, MCF_RTC_ISR_SAM7},
++};
++
++/* Those are the bits from a classic RTC we want to mimic */
++#define RTC_IRQF 0x80 /* any of the following 3 is active */
++#define RTC_PF 0x40 /* Periodic interrupt */
++#define RTC_AF 0x20 /* Alarm interrupt */
++#define RTC_UF 0x10 /* Update interrupt for 1Hz RTC */
++
++#define MCF_RTC_TIME 0
++#define MCF_RTC_ALARM 1
++
++struct rtc_plat_data {
++ struct rtc_device *rtc;
++ int irq;
++ unsigned int irqen;
++ int alrm_sec;
++ int alrm_min;
++ int alrm_hour;
++ int alrm_mday;
++};
++
++static const int year_cal_basic = 2112;
++
++#define RTC_VERSION "0.1"
++
++static u32 rtc_freq = 2; /* minimun value for PIE */
++static unsigned long rtc_status;
++
++static struct rtc_time g_rtc_alarm = {
++ .tm_year = 0,
++ .tm_mon = 0,
++ .tm_mday = 0,
++ .tm_hour = 0,
++ .tm_mon = 0,
++ .tm_sec = 0,
++};
++
++static DEFINE_SPINLOCK(rtc_lock);
++
++
++/*
++ * This funciton is used to disable RTC register write protection
++ */
++static void disable_register_write_protection(void)
++{
++ if (readw(MCF_RTC_SR) & MCF_RTC_SR_WPE) {
++ writew(0x0000, MCF_RTC_CR);
++ writew(0x0001, MCF_RTC_CR);
++ writew(0x0003, MCF_RTC_CR);
++ writew(0x0002, MCF_RTC_CR);
++ }
++
++}
++
++/*
++ * This function is used to obtain the RTC time or the alarm value in
++ * second.
++ *
++ * @param time_alarm use MCF_RTC_TIME for RTC time value;
++ * MCF_RTC_ALARM for alarm value
++ *
++ * @return The RTC time or alarm time in second.
++ */
++static u32 get_alarm_or_time(struct device *dev, int time_alarm,
++ struct rtc_time *tm)
++{
++ dev_dbg(dev, "debug function %s()!\n", __func__);
++
++ if (time_alarm == MCF_RTC_TIME) {
++ /*check register information */
++ dev_dbg(dev, "RTC_YEARMON:0x%x,RTC_DAYS:0x%x,RTC_HOURMIN:0x%x,"
++ "RTC_SECONDS:0x%x\n", readw(MCF_RTC_YEARMON),
++ readw(MCF_RTC_DAYS), readw(MCF_RTC_HOURMIN),
++ readw(MCF_RTC_SECONDS));
++
++ /* get year */
++ tm->tm_year = year_cal_basic +
++ (char)(MCF_RTC_YEARMON_YEAR_RD(readw(MCF_RTC_YEARMON)));
++ /* get month */
++ tm->tm_mon =
++ MCF_RTC_YEARMON_MON_RD(readw(MCF_RTC_YEARMON)) - 1;
++ /* get month day */
++ tm->tm_mday = MCF_RTC_DAYS_DAY_RD(readw(MCF_RTC_DAYS));
++ /* get year day */
++ tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon,
++ tm->tm_year);
++ /* year minus 1900 */
++ tm->tm_year = tm->tm_year - 1900;
++ /* get week day */
++ tm->tm_wday = MCF_RTC_DAYS_DAYWEEK_RD(readw(MCF_RTC_DAYS));
++ /* get hours */
++ tm->tm_hour =
++ MCF_RTC_HOURMIN_HOURS_RD(readw(MCF_RTC_HOURMIN));
++ /* get minutes */
++ tm->tm_min =
++ MCF_RTC_HOURMIN_MINUTES_RD(readw(MCF_RTC_HOURMIN));
++ /* get seconds */
++ tm->tm_sec =
++ MCF_RTC_SECONDS_SECONDS_RD(readw(MCF_RTC_SECONDS));
++ /* no day saving time */
++ tm->tm_isdst = -1;
++
++ /* check rtc_tm fileds information */
++ dev_dbg(dev, "RTC TIME --> year:%d,yday:%d,mon:%d,mday:%d,"
++ "wday:%d,hour:%d,min:%d,sec:%d\n", tm->tm_year,
++ tm->tm_yday, tm->tm_mon, tm->tm_mday, tm->tm_wday,
++ tm->tm_hour, tm->tm_min, tm->tm_sec);
++
++ } else if (time_alarm == MCF_RTC_ALARM) {
++ tm->tm_year = year_cal_basic +
++ (char)MCF_RTC_YEARMON_YEAR_RD
++ (readw(MCF_RTC_ALRM_YRMON));
++ tm->tm_mon =
++ MCF_RTC_YEARMON_MON_RD(readw(MCF_RTC_ALRM_YRMON)) - 1;
++ tm->tm_mday = MCF_RTC_DAYS_DAY_RD(readw(MCF_RTC_ALRM_DAYS));
++ tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon,
++ tm->tm_year);
++ tm->tm_year = tm->tm_year - 1900;
++ tm->tm_wday =
++ MCF_RTC_DAYS_DAYWEEK_RD(readw(MCF_RTC_ALRM_DAYS));
++ tm->tm_hour =
++ MCF_RTC_HOURMIN_HOURS_RD(readw(MCF_RTC_ALRM_HM));
++ tm->tm_min =
++ MCF_RTC_HOURMIN_MINUTES_RD(readw(MCF_RTC_ALRM_HM));
++ tm->tm_sec =
++ MCF_RTC_SECONDS_SECONDS_RD(readw(MCF_RTC_ALRM_SEC));
++ tm->tm_isdst = -1;
++
++ /* debug information */
++ dev_dbg(dev, "RTC ALARM --> year:%d,yday:%d,mon:%d,mday:%d,"
++ "wday:%d,hour:%d,min:%d,sec:%d\n", tm->tm_year,
++ tm->tm_yday, tm->tm_mon, tm->tm_mday, tm->tm_wday,
++ tm->tm_hour, tm->tm_min, tm->tm_sec);
++
++ } else {
++ panic("wrong value for time_alarm=%d\n", time_alarm);
++ }
++
++ return 0;
++}
++
++/*
++ * This function sets the RTC alarm value or the time value.
++ *
++ * @param time_alarm the new alarm value to be updated in the RTC
++ * @param time use MCF_RTC_TIME for RTC time value;
++ * MCF_RTC_ALARM for alarm value
++ */
++static void set_alarm_or_time(struct device *dev, int time_alarm,
++ struct rtc_time *tm)
++{
++ char year;
++
++ dev_dbg(dev, "debug function %s()!\n", __func__);
++
++ /* wirte enable setting */
++ disable_register_write_protection();
++
++ if (time_alarm == MCF_RTC_TIME) {
++ /* check rtc_time fields information */
++ dev_dbg(dev, "RTC TIME --> year:%d,yday:%d,mon:%d,mday:%d,"
++ "wday:%d,hour:%d,min:%d,sec:%d\n", tm->tm_year,
++ tm->tm_yday, tm->tm_mon, tm->tm_mday, tm->tm_wday,
++ tm->tm_hour, tm->tm_min, tm->tm_sec);
++
++ year = ((tm->tm_year + 1900) - year_cal_basic);
++ /* write RTC_YEARMON register */
++ writew((year << 8) | (tm->tm_mon + 1), MCF_RTC_YEARMON);
++
++ /* write RTC_DAYS register */
++ writew(MCF_RTC_DAYS_DAYWEEK_SET(tm->tm_wday) |
++ MCF_RTC_DAYS_DAY_SET(tm->tm_mday), MCF_RTC_DAYS);
++
++ /* write RTC_HOURMIN register */
++ writew(MCF_RTC_HOURMIN_HOURS_SET(tm->tm_hour) |
++ MCF_RTC_HOURMIN_MINUTES_SET(tm->tm_min),
++ MCF_RTC_HOURMIN);
++
++ /* write RTC_SECONDS register */
++ writew(MCF_RTC_SECONDS_SECONDS_SET
++ (tm->tm_sec), MCF_RTC_SECONDS);
++
++ /* debug information */
++ dev_dbg(dev, "RTC_YEARMON:0x%x, RTC_DAYS:0x%x, "
++ "RTC_HOURMIN:0x%x, RTC_SECONDS:0x%x\n",
++ readw(MCF_RTC_YEARMON), readw(MCF_RTC_DAYS),
++ readw(MCF_RTC_HOURMIN), readw(MCF_RTC_SECONDS));
++ } else if (time_alarm == MCF_RTC_ALARM) {
++
++ year = ((tm->tm_year + 1900) - year_cal_basic);
++ /* write RTC_YEARMON register */
++ writew((year << 8) | (tm->tm_mon + 1), MCF_RTC_ALRM_YRMON);
++
++ /* write RTC_DAYS register */
++ writew(MCF_RTC_DAYS_DAYWEEK_SET(tm->tm_wday) |
++ MCF_RTC_DAYS_DAY_SET(tm->tm_mday), MCF_RTC_ALRM_DAYS);
++
++ /* write RTC_HOURMIN register */
++ writew(MCF_RTC_HOURMIN_HOURS_SET(tm->tm_hour) |
++ MCF_RTC_HOURMIN_MINUTES_SET(tm->tm_min),
++ MCF_RTC_ALRM_HM);
++
++ /* write RTC_SECONDS register */
++ writew(MCF_RTC_SECONDS_SECONDS_SET
++ (tm->tm_sec), MCF_RTC_ALRM_SEC);
++
++ /* debug information */
++ dev_dbg(dev, "ALRM_YRMON:0x%x,ALRM_DAYS:0x%x,ALRM_HM:0x%x,"
++ "ALRM_SEC:0x%x\n", readw(MCF_RTC_ALRM_YRMON),
++ readw(MCF_RTC_ALRM_DAYS), readw(MCF_RTC_ALRM_HM),
++ readw(MCF_RTC_ALRM_SEC));
++ } else {
++ panic("wrong value for time_alarm=%d\n", time_alarm);
++ }
++}
++
++/*!
++ * This function updates the RTC alarm registers and then clears all the
++ * interrupt status bits.
++ *
++ * @param alrm the new alarm value to be updated in the RTC
++ *
++ * @return 0 if successful; non-zero otherwise.
++ */
++static int rtc_update_alarm(struct device *dev, struct rtc_time *alrm)
++{
++ /* clear all the interrupt status bits */
++ disable_register_write_protection();
++
++ writew(readw(MCF_RTC_ISR), MCF_RTC_ISR);
++
++ set_alarm_or_time(dev, MCF_RTC_ALARM, alrm);
++
++ return 0;
++}
++
++/*!
++ * This function is the RTC interrupt service routine.
++ *
++ * @param irq RTC IRQ number
++ * @param dev_id device ID which is not used
++ *
++ * @return IRQ_HANDLED as defined in the include/linux/interrupt.h file.
++ */
++static irqreturn_t mcf_rtc_interrupt(int irq, void *dev_id)
++{
++ struct platform_device *pdev = dev_id;
++ struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
++ u16 status = 0;
++ u32 events = 0;
++
++ spin_lock(&rtc_lock);
++
++ /* clear interrupt sources */
++ status = readw(MCF_RTC_ISR) & readw(MCF_RTC_IER);
++
++ disable_register_write_protection();
++
++ writew(status, MCF_RTC_ISR);
++
++ /* clear alarm interrupt if it has occurred */
++ if (status & MCF_RTC_ISR_ALM)
++ status &= ~MCF_RTC_ISR_ALM;
++
++ /* update irq data & counter */
++ if (status & MCF_RTC_ISR_ALM)
++ events |= (RTC_AF | RTC_IRQF);
++ if (status & MCF_RTC_ISR_1HZ)
++ events |= (RTC_UF | RTC_IRQF);
++ if (status & PIT_ALL_ON)
++ events |= (RTC_PF | RTC_IRQF);
++
++ if ((status & MCF_RTC_ISR_ALM) && rtc_valid_tm(&g_rtc_alarm))
++ rtc_update_alarm(&pdev->dev, &g_rtc_alarm);
++
++ spin_unlock(&rtc_lock);
++ rtc_update_irq(pdata->rtc, 1, events);
++ return IRQ_HANDLED;
++}
++
++/*!
++ * clear all interrupts and release the IRQ
++ */
++static void mcf_rtc_release(struct device *dev)
++{
++ spin_lock_irq(&rtc_lock);
++
++ disable_register_write_protection();
++
++ writew(0, MCF_RTC_IER); /* Disable all rtc interrupts */
++ writew(readw(MCF_RTC_ISR), MCF_RTC_ISR);
++ spin_unlock_irq(&rtc_lock);
++ rtc_status = 0;
++}
++
++/*!
++ * This function is used to support some ioctl calls directly.
++ * Other ioctl calls are supported indirectly through the
++ * arm/common/rtctime.c file.
++ *
++ * @param cmd ioctl command as defined in include/linux/rtc.h
++ * @param arg value for the ioctl command
++ *
++ * @return 0 if successful or negative value otherwise.
++ */
++static int mcf_rtc_ioctl(struct device *dev, unsigned int cmd,
++ unsigned long arg)
++{
++ int i;
++
++ disable_register_write_protection();
++
++ switch (cmd) {
++ case RTC_PIE_OFF:
++ writew((readw(MCF_RTC_IER) & ~PIT_ALL_ON), MCF_RTC_IER);
++ return 0;
++ case RTC_IRQP_SET:
++ if (arg < 2 || arg > MAX_PIE_FREQ || (arg % 2) != 0)
++ return -EINVAL; /* Also make sure a power of 2Hz */
++ if ((arg > 64) && (!capable(CAP_SYS_RESOURCE)))
++ return -EACCES;
++ rtc_freq = arg;
++ return 0;
++ case RTC_IRQP_READ:
++ return put_user(rtc_freq, (u32 *) arg);
++ case RTC_PIE_ON:
++ for (i = 0; i < MAX_PIE_NUM; i++) {
++ if (PIE_BIT_DEF[i][0] == rtc_freq)
++ break;
++ }
++ if (i == MAX_PIE_NUM)
++ return -EACCES;
++ spin_lock_irq(&rtc_lock);
++ writew((readw(MCF_RTC_IER) | PIE_BIT_DEF[i][1]), MCF_RTC_IER);
++ spin_unlock_irq(&rtc_lock);
++ return 0;
++ case RTC_AIE_OFF:
++ spin_lock_irq(&rtc_lock);
++ writew((readw(MCF_RTC_IER) & ~MCF_RTC_ISR_ALM), MCF_RTC_IER);
++ spin_unlock_irq(&rtc_lock);
++ return 0;
++
++ case RTC_AIE_ON:
++ spin_lock_irq(&rtc_lock);
++ writew((readw(MCF_RTC_IER) | MCF_RTC_ISR_ALM), MCF_RTC_IER);
++ spin_unlock_irq(&rtc_lock);
++ return 0;
++
++ case RTC_UIE_OFF: /* UIE is for the 1Hz interrupt */
++ spin_lock_irq(&rtc_lock);
++ writew((readw(MCF_RTC_IER) & ~MCF_RTC_ISR_1HZ), MCF_RTC_IER);
++ spin_unlock_irq(&rtc_lock);
++ return 0;
++
++ case RTC_UIE_ON:
++ spin_lock_irq(&rtc_lock);
++ writew((readw(MCF_RTC_IER) | MCF_RTC_ISR_1HZ), MCF_RTC_IER);
++ spin_unlock_irq(&rtc_lock);
++ return 0;
++ }
++ return -ENOIOCTLCMD;
++}
++
++/*!
++ * This function reads the current RTC time into tm in Gregorian date.
++ *
++ * @param tm contains the RTC time value upon return
++ *
++ * @return 0 if successful; non-zero otherwise.
++ */
++static int mcf_rtc_read_time(struct device *dev, struct rtc_time *tm)
++{
++ do {
++ get_alarm_or_time(dev, MCF_RTC_TIME, tm);
++ } while (0);
++
++ return 0;
++}
++
++/*!
++ * This function sets the internal RTC time based on tm in Gregorian date.
++ *
++ * @param tm the time value to be set in the RTC
++ *
++ * @return 0 if successful; non-zero otherwise.
++ */
++static int mcf_rtc_set_time(struct device *dev, struct rtc_time *tm)
++{
++ do {
++ set_alarm_or_time(dev, MCF_RTC_TIME, tm);
++ } while (0);
++
++ return 0;
++}
++
++/*!
++ * This function reads the current alarm value into the passed in \b alrm
++ * argument. It updates the \b alrm's pending field value based on the whether
++ * an alarm interrupt occurs or not.
++ *
++ * @param alrm contains the RTC alarm value upon return
++ *
++ * @return 0 if successful; non-zero otherwise.
++ */
++static int mcf_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
++{
++ do {
++ get_alarm_or_time(dev, MCF_RTC_ALARM, &alrm->time);
++ } while (0);
++
++ alrm->pending = ((readw(MCF_RTC_ISR) & MCF_RTC_ISR_ALM) != 0) ? 1 : 0;
++
++ return 0;
++}
++
++/*!
++ * This function sets the RTC alarm based on passed in alrm.
++ *
++ * @param alrm the alarm value to be set in the RTC
++ *
++ * @return 0 if successful; non-zero otherwise.
++ */
++static int mcf_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
++{
++ int ret;
++
++ spin_lock_irq(&rtc_lock);
++
++ disable_register_write_protection();
++
++ if (rtc_valid_tm(&alrm->time)) {
++ if (alrm->time.tm_sec > 59 ||
++ alrm->time.tm_hour > 23 || alrm->time.tm_min > 59) {
++ ret = -EINVAL;
++ goto out;
++ }
++ ret = rtc_update_alarm(dev, &alrm->time);
++ } else {
++ ret = rtc_valid_tm(&alrm->time);
++ if (ret)
++ goto out;
++ ret = rtc_update_alarm(dev, &alrm->time);
++ }
++
++ if (ret == 0) {
++ memcpy(&g_rtc_alarm, &alrm->time, sizeof(struct rtc_time));
++
++ if (alrm->enabled) {
++ writew((readw(MCF_RTC_IER) | MCF_RTC_ISR_ALM),
++ MCF_RTC_IER);
++ } else {
++ writew((readw(MCF_RTC_IER) & ~MCF_RTC_ISR_ALM),
++ MCF_RTC_IER);
++ }
++ }
++out:
++ spin_unlock_irq(&rtc_lock);
++
++ return ret;
++}
++
++/*!
++ * The RTC driver structure
++ */
++static struct rtc_class_ops mcf_rtc_ops = {
++ .ioctl = mcf_rtc_ioctl,
++ .read_time = mcf_rtc_read_time,
++ .set_time = mcf_rtc_set_time,
++ .read_alarm = mcf_rtc_read_alarm,
++ .set_alarm = mcf_rtc_set_alarm,
++};
++
++static int __devinit mcf_rtc_probe(struct platform_device *pdev)
++{
++ struct rtc_device *rtc;
++ struct rtc_plat_data *pdata = NULL;
++ u32 ret = 0;
++
++ disable_register_write_protection();
++ /* Clear interrupt before request irq */
++ writew(0x0100, MCF_RTC_CR);
++ writew(0x0001, MCF_RTC_IER);
++
++ if (!(readw(MCF_RTC_CFG_DATA) & MCF_RTC_CFG_DATA_OSCEN))
++ writew(MCF_RTC_CFG_DATA_OSCEN, MCF_RTC_CFG_DATA);
++
++ pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
++ if (!pdata)
++ return -ENOMEM;
++
++ pdata->irq = MCFINT_VECBASE + MCFINT_RTC;
++ if (request_irq(pdata->irq, mcf_rtc_interrupt, IRQF_DISABLED,
++ pdev->name, pdev) < 0) {
++ dev_warn(&pdev->dev, "interrupt not available.\n");
++ pdata->irq = -1;
++ }
++
++ if (test_and_set_bit(1, &rtc_status))
++ return -EBUSY;
++
++ rtc = rtc_device_register(pdev->name, &pdev->dev, &mcf_rtc_ops,
++ THIS_MODULE);
++ if (IS_ERR(rtc)) {
++ ret = PTR_ERR(rtc);
++ if (pdata->irq >= 0)
++ free_irq(pdata->irq, pdev);
++ kfree(pdata);
++ return ret;
++ }
++ pdata->rtc = rtc;
++ platform_set_drvdata(pdev, pdata);
++
++ dev_dbg(&pdev->dev, "RTC_CR:0x%x, RTC_SR:0x%x\n", readw(MCF_RTC_CR),
++ readw(MCF_RTC_SR));
++
++ printk(KERN_INFO "Real Time Clock Driver v%s\n", RTC_VERSION);
++ return ret;
++}
++
++static int __devexit mcf_rtc_remove(struct platform_device *pdev)
++{
++ struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
++
++ rtc_device_unregister(pdata->rtc);
++ if (pdata->irq >= 0)
++ free_irq(pdata->irq, pdev);
++ kfree(pdata);
++ mcf_rtc_release(NULL);
++ return 0;
++}
++
++/*!
++ * Contains pointers to the power management callback functions.
++ */
++MODULE_ALIAS("rtc-m5441x");
++static struct platform_driver mcf_rtc_driver = {
++ .driver = {
++ .name = "rtc-m5441x",
++ .owner = THIS_MODULE,
++ },
++ .probe = mcf_rtc_probe,
++ .remove = __devexit_p(mcf_rtc_remove),
++};
++
++/*!
++ * This function creates the /proc/driver/rtc file and registers the device RTC
++ * in the /dev/misc directory. It also reads the RTC value from external source
++ * and setup the internal RTC properly.
++ *
++ * @return -1 if RTC is failed to initialize; 0 is successful.
++ */
++static int __init mcf_rtc_init(void)
++{
++ return platform_driver_register(&mcf_rtc_driver);
++}
++
++/*!
++ * This function removes the /proc/driver/rtc file and un-registers the
++ * device RTC from the /dev/misc directory.
++ */
++static void __exit mcf_rtc_exit(void)
++{
++ platform_driver_unregister(&mcf_rtc_driver);
++
++}
++
++module_init(mcf_rtc_init);
++module_exit(mcf_rtc_exit);
++
++MODULE_AUTHOR("Freescale Semiconductor, Inc.");
++MODULE_DESCRIPTION("Real Time Clock Driver (MCF)");
++MODULE_LICENSE("GPL V2");
projects / openwrt / svn-archive / archive.git / blobdiff