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rtc-vr41xx: add irq_set_freq() and irq_set_state() 

Implement the ioctls RTC_PIE_ON, RTC_PIE_OFF, RTC_IRQP_SET and
RTC_IRQP_READ in the standard RTC way.

Thanks Dave for noticing it.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Cc: David Brownell <david-b@pacbell.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yoichi Yuasa 2008-07-23 21:30:48 -07:00 committed by Linus Torvalds
parent 7e2a31da85
commit 4cad4431fc
1 changed files with 34 additions and 31 deletions
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65
drivers/rtc/rtc-vr41xx.c
View File

@ -1,7 +1,7 @@
/* /*
* Driver for NEC VR4100 series Real Time Clock unit. * Driver for NEC VR4100 series Real Time Clock unit.
* *
* Copyright (C) 2003-2006 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> * Copyright (C) 2003-2008 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License as published by
@ -34,7 +34,7 @@
MODULE_AUTHOR("Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>"); MODULE_AUTHOR("Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>");
MODULE_DESCRIPTION("NEC VR4100 series RTC driver"); MODULE_DESCRIPTION("NEC VR4100 series RTC driver");
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL v2");
/* RTC 1 registers */ /* RTC 1 registers */
#define ETIMELREG 0x00 #define ETIMELREG 0x00
@ -82,7 +82,6 @@ static unsigned long epoch = 1970; /* Jan 1 1970 00:00:00 */
static DEFINE_SPINLOCK(rtc_lock); static DEFINE_SPINLOCK(rtc_lock);
static char rtc_name[] = "RTC"; static char rtc_name[] = "RTC";
static unsigned long periodic_frequency;
static unsigned long periodic_count; static unsigned long periodic_count;
static unsigned int alarm_enabled; static unsigned int alarm_enabled;
static int aie_irq = -1; static int aie_irq = -1;
@ -207,10 +206,37 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
return 0; return 0;
} }
static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) static int vr41xx_rtc_irq_set_freq(struct device *dev, int freq)
{ {
unsigned long count; unsigned long count;
count = RTC_FREQUENCY;
do_div(count, freq);
periodic_count = count;
spin_lock_irq(&rtc_lock);
rtc1_write(RTCL1LREG, count);
rtc1_write(RTCL1HREG, count >> 16);
spin_unlock_irq(&rtc_lock);
return 0;
}
static int vr41xx_rtc_irq_set_state(struct device *dev, int enabled)
{
if (enabled)
enable_irq(pie_irq);
else
disable_irq(pie_irq);
return 0;
}
static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
switch (cmd) { switch (cmd) {
case RTC_AIE_ON: case RTC_AIE_ON:
spin_lock_irq(&rtc_lock); spin_lock_irq(&rtc_lock);
@ -230,33 +256,6 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long
alarm_enabled = 0; alarm_enabled = 0;
} }
spin_unlock_irq(&rtc_lock);
break;
case RTC_PIE_ON:
enable_irq(pie_irq);
break;
case RTC_PIE_OFF:
disable_irq(pie_irq);
break;
case RTC_IRQP_READ:
return put_user(periodic_frequency, (unsigned long __user *)arg);
break;
case RTC_IRQP_SET:
if (arg > MAX_PERIODIC_RATE)
return -EINVAL;
periodic_frequency = arg;
count = RTC_FREQUENCY;
do_div(count, arg);
periodic_count = count;
spin_lock_irq(&rtc_lock);
rtc1_write(RTCL1LREG, count);
rtc1_write(RTCL1HREG, count >> 16);
spin_unlock_irq(&rtc_lock); spin_unlock_irq(&rtc_lock);
break; break;
case RTC_EPOCH_READ: case RTC_EPOCH_READ:
@ -309,6 +308,8 @@ static const struct rtc_class_ops vr41xx_rtc_ops = {
.set_time = vr41xx_rtc_set_time, .set_time = vr41xx_rtc_set_time,
.read_alarm = vr41xx_rtc_read_alarm, .read_alarm = vr41xx_rtc_read_alarm,
.set_alarm = vr41xx_rtc_set_alarm, .set_alarm = vr41xx_rtc_set_alarm,
.irq_set_freq = vr41xx_rtc_irq_set_freq,
.irq_set_state = vr41xx_rtc_irq_set_state,
}; };
static int __devinit rtc_probe(struct platform_device *pdev) static int __devinit rtc_probe(struct platform_device *pdev)
@ -346,6 +347,8 @@ static int __devinit rtc_probe(struct platform_device *pdev)
goto err_iounmap_all; goto err_iounmap_all;
} }
rtc->max_user_freq = MAX_PERIODIC_RATE;
spin_lock_irq(&rtc_lock); spin_lock_irq(&rtc_lock);
rtc1_write(ECMPLREG, 0); rtc1_write(ECMPLREG, 0);