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/* drivers/rtc/rtc-s3c.c
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*
* Copyright ( c ) 2010 Samsung Electronics Co . , Ltd .
* http : //www.samsung.com/
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*
* Copyright ( c ) 2004 , 2006 Simtec Electronics
* Ben Dooks , < ben @ simtec . co . uk >
* http : //armlinux.simtec.co.uk/
*
* 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 .
*
* S3C2410 / S3C2440 / S3C24XX Internal RTC Driver
*/
# include <linux/module.h>
# include <linux/fs.h>
# include <linux/string.h>
# include <linux/init.h>
# include <linux/platform_device.h>
# include <linux/interrupt.h>
# include <linux/rtc.h>
# include <linux/bcd.h>
# include <linux/clk.h>
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# include <linux/log2.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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# include <linux/slab.h>
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# include <linux/of.h>
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# include <linux/uaccess.h>
# include <linux/io.h>
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# include <asm/irq.h>
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# include "rtc-s3c.h"
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struct s3c_rtc {
struct device * dev ;
struct rtc_device * rtc ;
void __iomem * base ;
struct clk * rtc_clk ;
bool enabled ;
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struct s3c_rtc_data * data ;
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int irq_alarm ;
int irq_tick ;
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spinlock_t pie_lock ;
spinlock_t alarm_clk_lock ;
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int ticnt_save , ticnt_en_save ;
bool wake_en ;
} ;
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struct s3c_rtc_data {
int max_user_freq ;
void ( * irq_handler ) ( struct s3c_rtc * info , int mask ) ;
void ( * set_freq ) ( struct s3c_rtc * info , int freq ) ;
void ( * enable_tick ) ( struct s3c_rtc * info , struct seq_file * seq ) ;
void ( * select_tick_clk ) ( struct s3c_rtc * info ) ;
void ( * save_tick_cnt ) ( struct s3c_rtc * info ) ;
void ( * restore_tick_cnt ) ( struct s3c_rtc * info ) ;
void ( * enable ) ( struct s3c_rtc * info ) ;
void ( * disable ) ( struct s3c_rtc * info ) ;
} ;
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static void s3c_rtc_alarm_clk_enable ( struct s3c_rtc * info , bool enable )
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{
unsigned long irq_flags ;
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spin_lock_irqsave ( & info - > alarm_clk_lock , irq_flags ) ;
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if ( enable ) {
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if ( ! info - > enabled ) {
clk_enable ( info - > rtc_clk ) ;
info - > enabled = true ;
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}
} else {
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if ( info - > enabled ) {
clk_disable ( info - > rtc_clk ) ;
info - > enabled = false ;
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}
}
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spin_unlock_irqrestore ( & info - > alarm_clk_lock , irq_flags ) ;
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}
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/* IRQ Handlers */
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static irqreturn_t s3c_rtc_tickirq ( int irq , void * id )
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{
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struct s3c_rtc * info = ( struct s3c_rtc * ) id ;
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if ( info - > data - > irq_handler )
info - > data - > irq_handler ( info , S3C2410_INTP_TIC ) ;
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return IRQ_HANDLED ;
}
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static irqreturn_t s3c_rtc_alarmirq ( int irq , void * id )
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{
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struct s3c_rtc * info = ( struct s3c_rtc * ) id ;
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if ( info - > data - > irq_handler )
info - > data - > irq_handler ( info , S3C2410_INTP_ALM ) ;
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return IRQ_HANDLED ;
}
/* Update control registers */
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static int s3c_rtc_setaie ( struct device * dev , unsigned int enabled )
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{
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struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
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unsigned int tmp ;
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dev_dbg ( info - > dev , " %s: aie=%d \n " , __func__ , enabled ) ;
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clk_enable ( info - > rtc_clk ) ;
tmp = readb ( info - > base + S3C2410_RTCALM ) & ~ S3C2410_RTCALM_ALMEN ;
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if ( enabled )
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tmp | = S3C2410_RTCALM_ALMEN ;
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writeb ( tmp , info - > base + S3C2410_RTCALM ) ;
clk_disable ( info - > rtc_clk ) ;
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s3c_rtc_alarm_clk_enable ( info , enabled ) ;
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return 0 ;
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}
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/* Set RTC frequency */
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static int s3c_rtc_setfreq ( struct s3c_rtc * info , int freq )
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{
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if ( ! is_power_of_2 ( freq ) )
return - EINVAL ;
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clk_enable ( info - > rtc_clk ) ;
spin_lock_irq ( & info - > pie_lock ) ;
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if ( info - > data - > set_freq )
info - > data - > set_freq ( info , freq ) ;
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spin_unlock_irq ( & info - > pie_lock ) ;
clk_disable ( info - > rtc_clk ) ;
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return 0 ;
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}
/* Time read/write */
static int s3c_rtc_gettime ( struct device * dev , struct rtc_time * rtc_tm )
{
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struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
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unsigned int have_retried = 0 ;
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clk_enable ( info - > rtc_clk ) ;
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retry_get_time :
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rtc_tm - > tm_min = readb ( info - > base + S3C2410_RTCMIN ) ;
rtc_tm - > tm_hour = readb ( info - > base + S3C2410_RTCHOUR ) ;
rtc_tm - > tm_mday = readb ( info - > base + S3C2410_RTCDATE ) ;
rtc_tm - > tm_mon = readb ( info - > base + S3C2410_RTCMON ) ;
rtc_tm - > tm_year = readb ( info - > base + S3C2410_RTCYEAR ) ;
rtc_tm - > tm_sec = readb ( info - > base + S3C2410_RTCSEC ) ;
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/* the only way to work out whether the system was mid-update
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* when we read it is to check the second counter , and if it
* is zero , then we re - try the entire read
*/
if ( rtc_tm - > tm_sec = = 0 & & ! have_retried ) {
have_retried = 1 ;
goto retry_get_time ;
}
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rtc_tm - > tm_sec = bcd2bin ( rtc_tm - > tm_sec ) ;
rtc_tm - > tm_min = bcd2bin ( rtc_tm - > tm_min ) ;
rtc_tm - > tm_hour = bcd2bin ( rtc_tm - > tm_hour ) ;
rtc_tm - > tm_mday = bcd2bin ( rtc_tm - > tm_mday ) ;
rtc_tm - > tm_mon = bcd2bin ( rtc_tm - > tm_mon ) ;
rtc_tm - > tm_year = bcd2bin ( rtc_tm - > tm_year ) ;
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rtc_tm - > tm_year + = 100 ;
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dev_dbg ( dev , " read time %04d.%02d.%02d %02d:%02d:%02d \n " ,
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1900 + rtc_tm - > tm_year , rtc_tm - > tm_mon , rtc_tm - > tm_mday ,
rtc_tm - > tm_hour , rtc_tm - > tm_min , rtc_tm - > tm_sec ) ;
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rtc_tm - > tm_mon - = 1 ;
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clk_disable ( info - > rtc_clk ) ;
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return rtc_valid_tm ( rtc_tm ) ;
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}
static int s3c_rtc_settime ( struct device * dev , struct rtc_time * tm )
{
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struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
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int year = tm - > tm_year - 100 ;
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dev_dbg ( dev , " set time %04d.%02d.%02d %02d:%02d:%02d \n " ,
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1900 + tm - > tm_year , tm - > tm_mon , tm - > tm_mday ,
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tm - > tm_hour , tm - > tm_min , tm - > tm_sec ) ;
/* we get around y2k by simply not supporting it */
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if ( year < 0 | | year > = 100 ) {
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dev_err ( dev , " rtc only supports 100 years \n " ) ;
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return - EINVAL ;
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}
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clk_enable ( info - > rtc_clk ) ;
writeb ( bin2bcd ( tm - > tm_sec ) , info - > base + S3C2410_RTCSEC ) ;
writeb ( bin2bcd ( tm - > tm_min ) , info - > base + S3C2410_RTCMIN ) ;
writeb ( bin2bcd ( tm - > tm_hour ) , info - > base + S3C2410_RTCHOUR ) ;
writeb ( bin2bcd ( tm - > tm_mday ) , info - > base + S3C2410_RTCDATE ) ;
writeb ( bin2bcd ( tm - > tm_mon + 1 ) , info - > base + S3C2410_RTCMON ) ;
writeb ( bin2bcd ( year ) , info - > base + S3C2410_RTCYEAR ) ;
clk_disable ( info - > rtc_clk ) ;
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return 0 ;
}
static int s3c_rtc_getalarm ( struct device * dev , struct rtc_wkalrm * alrm )
{
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struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
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struct rtc_time * alm_tm = & alrm - > time ;
unsigned int alm_en ;
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clk_enable ( info - > rtc_clk ) ;
alm_tm - > tm_sec = readb ( info - > base + S3C2410_ALMSEC ) ;
alm_tm - > tm_min = readb ( info - > base + S3C2410_ALMMIN ) ;
alm_tm - > tm_hour = readb ( info - > base + S3C2410_ALMHOUR ) ;
alm_tm - > tm_mon = readb ( info - > base + S3C2410_ALMMON ) ;
alm_tm - > tm_mday = readb ( info - > base + S3C2410_ALMDATE ) ;
alm_tm - > tm_year = readb ( info - > base + S3C2410_ALMYEAR ) ;
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alm_en = readb ( info - > base + S3C2410_RTCALM ) ;
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alrm - > enabled = ( alm_en & S3C2410_RTCALM_ALMEN ) ? 1 : 0 ;
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dev_dbg ( dev , " read alarm %d, %04d.%02d.%02d %02d:%02d:%02d \n " ,
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alm_en ,
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1900 + alm_tm - > tm_year , alm_tm - > tm_mon , alm_tm - > tm_mday ,
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alm_tm - > tm_hour , alm_tm - > tm_min , alm_tm - > tm_sec ) ;
/* decode the alarm enable field */
if ( alm_en & S3C2410_RTCALM_SECEN )
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alm_tm - > tm_sec = bcd2bin ( alm_tm - > tm_sec ) ;
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else
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alm_tm - > tm_sec = - 1 ;
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if ( alm_en & S3C2410_RTCALM_MINEN )
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alm_tm - > tm_min = bcd2bin ( alm_tm - > tm_min ) ;
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else
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alm_tm - > tm_min = - 1 ;
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if ( alm_en & S3C2410_RTCALM_HOUREN )
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alm_tm - > tm_hour = bcd2bin ( alm_tm - > tm_hour ) ;
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else
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alm_tm - > tm_hour = - 1 ;
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if ( alm_en & S3C2410_RTCALM_DAYEN )
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alm_tm - > tm_mday = bcd2bin ( alm_tm - > tm_mday ) ;
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else
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alm_tm - > tm_mday = - 1 ;
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if ( alm_en & S3C2410_RTCALM_MONEN ) {
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alm_tm - > tm_mon = bcd2bin ( alm_tm - > tm_mon ) ;
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alm_tm - > tm_mon - = 1 ;
} else {
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alm_tm - > tm_mon = - 1 ;
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}
if ( alm_en & S3C2410_RTCALM_YEAREN )
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alm_tm - > tm_year = bcd2bin ( alm_tm - > tm_year ) ;
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else
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alm_tm - > tm_year = - 1 ;
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clk_disable ( info - > rtc_clk ) ;
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return 0 ;
}
static int s3c_rtc_setalarm ( struct device * dev , struct rtc_wkalrm * alrm )
{
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struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
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struct rtc_time * tm = & alrm - > time ;
unsigned int alrm_en ;
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clk_enable ( info - > rtc_clk ) ;
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dev_dbg ( dev , " s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d \n " ,
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alrm - > enabled ,
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1900 + tm - > tm_year , tm - > tm_mon + 1 , tm - > tm_mday ,
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tm - > tm_hour , tm - > tm_min , tm - > tm_sec ) ;
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alrm_en = readb ( info - > base + S3C2410_RTCALM ) & S3C2410_RTCALM_ALMEN ;
writeb ( 0x00 , info - > base + S3C2410_RTCALM ) ;
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if ( tm - > tm_sec < 60 & & tm - > tm_sec > = 0 ) {
alrm_en | = S3C2410_RTCALM_SECEN ;
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writeb ( bin2bcd ( tm - > tm_sec ) , info - > base + S3C2410_ALMSEC ) ;
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}
if ( tm - > tm_min < 60 & & tm - > tm_min > = 0 ) {
alrm_en | = S3C2410_RTCALM_MINEN ;
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writeb ( bin2bcd ( tm - > tm_min ) , info - > base + S3C2410_ALMMIN ) ;
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}
if ( tm - > tm_hour < 24 & & tm - > tm_hour > = 0 ) {
alrm_en | = S3C2410_RTCALM_HOUREN ;
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writeb ( bin2bcd ( tm - > tm_hour ) , info - > base + S3C2410_ALMHOUR ) ;
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}
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dev_dbg ( dev , " setting S3C2410_RTCALM to %08x \n " , alrm_en ) ;
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writeb ( alrm_en , info - > base + S3C2410_RTCALM ) ;
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s3c_rtc_setaie ( dev , alrm - > enabled ) ;
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clk_disable ( info - > rtc_clk ) ;
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return 0 ;
}
static int s3c_rtc_proc ( struct device * dev , struct seq_file * seq )
{
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struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
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clk_enable ( info - > rtc_clk ) ;
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if ( info - > data - > enable_tick )
info - > data - > enable_tick ( info , seq ) ;
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clk_disable ( info - > rtc_clk ) ;
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return 0 ;
}
2006-10-01 10:28:17 +04:00
static const struct rtc_class_ops s3c_rtcops = {
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. read_time = s3c_rtc_gettime ,
. set_time = s3c_rtc_settime ,
. read_alarm = s3c_rtc_getalarm ,
. set_alarm = s3c_rtc_setalarm ,
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. proc = s3c_rtc_proc ,
. alarm_irq_enable = s3c_rtc_setaie ,
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} ;
2014-10-14 02:52:33 +04:00
static void s3c24xx_rtc_enable ( struct s3c_rtc * info )
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{
2014-10-14 02:52:31 +04:00
unsigned int con , tmp ;
2006-07-01 15:36:26 +04:00
2014-10-14 02:52:28 +04:00
clk_enable ( info - > rtc_clk ) ;
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con = readw ( info - > base + S3C2410_RTCCON ) ;
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/* re-enable the device, and check it is ok */
if ( ( con & S3C2410_RTCCON_RTCEN ) = = 0 ) {
dev_info ( info - > dev , " rtc disabled, re-enabling \n " ) ;
2006-07-01 15:36:26 +04:00
2014-10-14 02:52:33 +04:00
tmp = readw ( info - > base + S3C2410_RTCCON ) ;
writew ( tmp | S3C2410_RTCCON_RTCEN ,
info - > base + S3C2410_RTCCON ) ;
}
2006-07-01 15:36:26 +04:00
2014-10-14 02:52:33 +04:00
if ( con & S3C2410_RTCCON_CNTSEL ) {
dev_info ( info - > dev , " removing RTCCON_CNTSEL \n " ) ;
2006-07-01 15:36:26 +04:00
2014-10-14 02:52:33 +04:00
tmp = readw ( info - > base + S3C2410_RTCCON ) ;
writew ( tmp & ~ S3C2410_RTCCON_CNTSEL ,
info - > base + S3C2410_RTCCON ) ;
}
2006-07-01 15:36:26 +04:00
2014-10-14 02:52:33 +04:00
if ( con & S3C2410_RTCCON_CLKRST ) {
dev_info ( info - > dev , " removing RTCCON_CLKRST \n " ) ;
2006-07-01 15:36:26 +04:00
2014-10-14 02:52:33 +04:00
tmp = readw ( info - > base + S3C2410_RTCCON ) ;
writew ( tmp & ~ S3C2410_RTCCON_CLKRST ,
info - > base + S3C2410_RTCCON ) ;
2006-07-01 15:36:26 +04:00
}
2014-10-14 02:52:33 +04:00
clk_disable ( info - > rtc_clk ) ;
}
static void s3c24xx_rtc_disable ( struct s3c_rtc * info )
{
unsigned int con ;
clk_enable ( info - > rtc_clk ) ;
con = readw ( info - > base + S3C2410_RTCCON ) ;
con & = ~ S3C2410_RTCCON_RTCEN ;
writew ( con , info - > base + S3C2410_RTCCON ) ;
con = readb ( info - > base + S3C2410_TICNT ) ;
con & = ~ S3C2410_TICNT_ENABLE ;
writeb ( con , info - > base + S3C2410_TICNT ) ;
clk_disable ( info - > rtc_clk ) ;
}
static void s3c6410_rtc_disable ( struct s3c_rtc * info )
{
unsigned int con ;
clk_enable ( info - > rtc_clk ) ;
con = readw ( info - > base + S3C2410_RTCCON ) ;
con & = ~ S3C64XX_RTCCON_TICEN ;
con & = ~ S3C2410_RTCCON_RTCEN ;
writew ( con , info - > base + S3C2410_RTCCON ) ;
2014-10-14 02:52:28 +04:00
clk_disable ( info - > rtc_clk ) ;
2006-07-01 15:36:26 +04:00
}
2014-10-14 02:52:28 +04:00
static int s3c_rtc_remove ( struct platform_device * pdev )
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{
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struct s3c_rtc * info = platform_get_drvdata ( pdev ) ;
s3c_rtc_setaie ( info - > dev , 0 ) ;
2006-07-01 15:36:26 +04:00
2014-10-14 02:52:28 +04:00
clk_unprepare ( info - > rtc_clk ) ;
info - > rtc_clk = NULL ;
2010-07-20 10:49:14 +04:00
2006-07-01 15:36:26 +04:00
return 0 ;
}
2011-12-24 05:52:14 +04:00
static const struct of_device_id s3c_rtc_dt_match [ ] ;
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static struct s3c_rtc_data * s3c_rtc_get_data ( struct platform_device * pdev )
2011-12-24 05:52:14 +04:00
{
2014-10-14 02:52:33 +04:00
const struct of_device_id * match ;
2014-10-14 02:52:31 +04:00
2014-10-14 02:52:33 +04:00
match = of_match_node ( s3c_rtc_dt_match , pdev - > dev . of_node ) ;
return ( struct s3c_rtc_data * ) match - > data ;
2011-12-24 05:52:14 +04:00
}
2012-12-22 01:09:38 +04:00
static int s3c_rtc_probe ( struct platform_device * pdev )
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{
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struct s3c_rtc * info = NULL ;
2010-10-28 02:33:10 +04:00
struct rtc_time rtc_tm ;
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struct resource * res ;
int ret ;
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info = devm_kzalloc ( & pdev - > dev , sizeof ( * info ) , GFP_KERNEL ) ;
if ( ! info )
return - ENOMEM ;
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/* find the IRQs */
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info - > irq_tick = platform_get_irq ( pdev , 1 ) ;
if ( info - > irq_tick < 0 ) {
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dev_err ( & pdev - > dev , " no irq for rtc tick \n " ) ;
2014-10-14 02:52:28 +04:00
return info - > irq_tick ;
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}
2014-10-14 02:52:28 +04:00
info - > dev = & pdev - > dev ;
2014-10-14 02:52:33 +04:00
info - > data = s3c_rtc_get_data ( pdev ) ;
if ( ! info - > data ) {
dev_err ( & pdev - > dev , " failed getting s3c_rtc_data \n " ) ;
return - EINVAL ;
}
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spin_lock_init ( & info - > pie_lock ) ;
spin_lock_init ( & info - > alarm_clk_lock ) ;
platform_set_drvdata ( pdev , info ) ;
info - > irq_alarm = platform_get_irq ( pdev , 0 ) ;
if ( info - > irq_alarm < 0 ) {
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dev_err ( & pdev - > dev , " no irq for alarm \n " ) ;
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return info - > irq_alarm ;
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}
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dev_dbg ( & pdev - > dev , " s3c2410_rtc: tick irq %d, alarm irq %d \n " ,
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info - > irq_tick , info - > irq_alarm ) ;
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/* get the memory region */
res = platform_get_resource ( pdev , IORESOURCE_MEM , 0 ) ;
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info - > base = devm_ioremap_resource ( & pdev - > dev , res ) ;
if ( IS_ERR ( info - > base ) )
return PTR_ERR ( info - > base ) ;
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2014-10-14 02:52:28 +04:00
info - > rtc_clk = devm_clk_get ( & pdev - > dev , " rtc " ) ;
if ( IS_ERR ( info - > rtc_clk ) ) {
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dev_err ( & pdev - > dev , " failed to find rtc clock source \n " ) ;
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return PTR_ERR ( info - > rtc_clk ) ;
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}
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clk_prepare_enable ( info - > rtc_clk ) ;
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/* check to see if everything is setup correctly */
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if ( info - > data - > enable )
info - > data - > enable ( info ) ;
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dev_dbg ( & pdev - > dev , " s3c2410_rtc: RTCCON=%02x \n " ,
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readw ( info - > base + S3C2410_RTCCON ) ) ;
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2008-10-30 00:01:16 +03:00
device_init_wakeup ( & pdev - > dev , 1 ) ;
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/* register RTC and exit */
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info - > rtc = devm_rtc_device_register ( & pdev - > dev , " s3c " , & s3c_rtcops ,
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THIS_MODULE ) ;
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if ( IS_ERR ( info - > rtc ) ) {
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dev_err ( & pdev - > dev , " cannot attach rtc \n " ) ;
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ret = PTR_ERR ( info - > rtc ) ;
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goto err_nortc ;
}
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ret = devm_request_irq ( & pdev - > dev , info - > irq_alarm , s3c_rtc_alarmirq ,
0 , " s3c2410-rtc alarm " , info ) ;
if ( ret ) {
dev_err ( & pdev - > dev , " IRQ%d error %d \n " , info - > irq_alarm , ret ) ;
goto err_nortc ;
}
2010-06-05 01:14:46 +04:00
2014-10-14 02:52:28 +04:00
ret = devm_request_irq ( & pdev - > dev , info - > irq_tick , s3c_rtc_tickirq ,
0 , " s3c2410-rtc tick " , info ) ;
if ( ret ) {
dev_err ( & pdev - > dev , " IRQ%d error %d \n " , info - > irq_tick , ret ) ;
goto err_nortc ;
}
2010-07-29 08:00:42 +04:00
2014-10-14 02:52:28 +04:00
/* Check RTC Time */
s3c_rtc_gettime ( & pdev - > dev , & rtc_tm ) ;
2010-07-29 08:00:42 +04:00
2010-10-28 02:33:10 +04:00
if ( rtc_valid_tm ( & rtc_tm ) ) {
rtc_tm . tm_year = 100 ;
rtc_tm . tm_mon = 0 ;
rtc_tm . tm_mday = 1 ;
rtc_tm . tm_hour = 0 ;
rtc_tm . tm_min = 0 ;
rtc_tm . tm_sec = 0 ;
2014-10-14 02:52:28 +04:00
s3c_rtc_settime ( & pdev - > dev , & rtc_tm ) ;
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dev_warn ( & pdev - > dev , " warning: invalid RTC value so initializing it \n " ) ;
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}
2014-10-14 02:52:33 +04:00
if ( info - > data - > select_tick_clk )
info - > data - > select_tick_clk ( info ) ;
2011-08-26 02:59:24 +04:00
2014-10-14 02:52:28 +04:00
s3c_rtc_setfreq ( info , 1 ) ;
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2014-10-14 02:52:28 +04:00
clk_disable ( info - > rtc_clk ) ;
2011-07-26 04:13:32 +04:00
2006-07-01 15:36:26 +04:00
return 0 ;
err_nortc :
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if ( info - > data - > disable )
info - > data - > disable ( info ) ;
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clk_disable_unprepare ( info - > rtc_clk ) ;
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return ret ;
}
2013-04-30 03:19:27 +04:00
# ifdef CONFIG_PM_SLEEP
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2013-04-30 03:19:27 +04:00
static int s3c_rtc_suspend ( struct device * dev )
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{
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struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
2013-04-30 03:19:27 +04:00
2014-10-14 02:52:28 +04:00
clk_enable ( info - > rtc_clk ) ;
2014-10-14 02:52:33 +04:00
2006-07-01 15:36:26 +04:00
/* save TICNT for anyone using periodic interrupts */
2014-10-14 02:52:33 +04:00
if ( info - > data - > save_tick_cnt )
info - > data - > save_tick_cnt ( info ) ;
if ( info - > data - > disable )
info - > data - > disable ( info ) ;
2010-09-23 00:05:13 +04:00
2014-10-14 02:52:28 +04:00
if ( device_may_wakeup ( dev ) & & ! info - > wake_en ) {
if ( enable_irq_wake ( info - > irq_alarm ) = = 0 )
info - > wake_en = true ;
2011-05-12 02:13:28 +04:00
else
2013-04-30 03:19:27 +04:00
dev_err ( dev , " enable_irq_wake failed \n " ) ;
2011-05-12 02:13:28 +04:00
}
2014-10-14 02:52:33 +04:00
2014-10-14 02:52:28 +04:00
clk_disable ( info - > rtc_clk ) ;
2010-09-23 00:05:13 +04:00
2006-07-01 15:36:26 +04:00
return 0 ;
}
2013-04-30 03:19:27 +04:00
static int s3c_rtc_resume ( struct device * dev )
2006-07-01 15:36:26 +04:00
{
2014-10-14 02:52:28 +04:00
struct s3c_rtc * info = dev_get_drvdata ( dev ) ;
2010-05-25 01:33:43 +04:00
2014-10-14 02:52:28 +04:00
clk_enable ( info - > rtc_clk ) ;
2014-10-14 02:52:33 +04:00
if ( info - > data - > enable )
info - > data - > enable ( info ) ;
if ( info - > data - > restore_tick_cnt )
info - > data - > restore_tick_cnt ( info ) ;
2010-09-23 00:05:13 +04:00
2014-10-14 02:52:28 +04:00
if ( device_may_wakeup ( dev ) & & info - > wake_en ) {
disable_irq_wake ( info - > irq_alarm ) ;
info - > wake_en = false ;
2011-05-12 02:13:28 +04:00
}
2014-10-14 02:52:33 +04:00
2014-10-14 02:52:28 +04:00
clk_disable ( info - > rtc_clk ) ;
2010-09-23 00:05:13 +04:00
2006-07-01 15:36:26 +04:00
return 0 ;
}
# endif
2013-04-30 03:19:27 +04:00
static SIMPLE_DEV_PM_OPS ( s3c_rtc_pm_ops , s3c_rtc_suspend , s3c_rtc_resume ) ;
2014-10-14 02:52:33 +04:00
static void s3c24xx_rtc_irq ( struct s3c_rtc * info , int mask )
{
clk_enable ( info - > rtc_clk ) ;
rtc_update_irq ( info - > rtc , 1 , RTC_AF | RTC_IRQF ) ;
clk_disable ( info - > rtc_clk ) ;
s3c_rtc_alarm_clk_enable ( info , false ) ;
}
static void s3c6410_rtc_irq ( struct s3c_rtc * info , int mask )
{
clk_enable ( info - > rtc_clk ) ;
rtc_update_irq ( info - > rtc , 1 , RTC_AF | RTC_IRQF ) ;
writeb ( mask , info - > base + S3C2410_INTP ) ;
clk_disable ( info - > rtc_clk ) ;
s3c_rtc_alarm_clk_enable ( info , false ) ;
}
static void s3c2410_rtc_setfreq ( struct s3c_rtc * info , int freq )
{
unsigned int tmp = 0 ;
int val ;
tmp = readb ( info - > base + S3C2410_TICNT ) ;
tmp & = S3C2410_TICNT_ENABLE ;
val = ( info - > rtc - > max_user_freq / freq ) - 1 ;
tmp | = val ;
writel ( tmp , info - > base + S3C2410_TICNT ) ;
}
static void s3c2416_rtc_setfreq ( struct s3c_rtc * info , int freq )
{
unsigned int tmp = 0 ;
int val ;
tmp = readb ( info - > base + S3C2410_TICNT ) ;
tmp & = S3C2410_TICNT_ENABLE ;
val = ( info - > rtc - > max_user_freq / freq ) - 1 ;
tmp | = S3C2443_TICNT_PART ( val ) ;
writel ( S3C2443_TICNT1_PART ( val ) , info - > base + S3C2443_TICNT1 ) ;
writel ( S3C2416_TICNT2_PART ( val ) , info - > base + S3C2416_TICNT2 ) ;
writel ( tmp , info - > base + S3C2410_TICNT ) ;
}
static void s3c2443_rtc_setfreq ( struct s3c_rtc * info , int freq )
{
unsigned int tmp = 0 ;
int val ;
tmp = readb ( info - > base + S3C2410_TICNT ) ;
tmp & = S3C2410_TICNT_ENABLE ;
val = ( info - > rtc - > max_user_freq / freq ) - 1 ;
tmp | = S3C2443_TICNT_PART ( val ) ;
writel ( S3C2443_TICNT1_PART ( val ) , info - > base + S3C2443_TICNT1 ) ;
writel ( tmp , info - > base + S3C2410_TICNT ) ;
}
static void s3c6410_rtc_setfreq ( struct s3c_rtc * info , int freq )
{
int val ;
val = ( info - > rtc - > max_user_freq / freq ) - 1 ;
writel ( val , info - > base + S3C2410_TICNT ) ;
}
static void s3c24xx_rtc_enable_tick ( struct s3c_rtc * info , struct seq_file * seq )
{
unsigned int ticnt ;
ticnt = readb ( info - > base + S3C2410_TICNT ) ;
ticnt & = S3C2410_TICNT_ENABLE ;
seq_printf ( seq , " periodic_IRQ \t : %s \n " , ticnt ? " yes " : " no " ) ;
}
static void s3c2416_rtc_select_tick_clk ( struct s3c_rtc * info )
{
unsigned int con ;
con = readw ( info - > base + S3C2410_RTCCON ) ;
con | = S3C2443_RTCCON_TICSEL ;
writew ( con , info - > base + S3C2410_RTCCON ) ;
}
static void s3c6410_rtc_enable_tick ( struct s3c_rtc * info , struct seq_file * seq )
{
unsigned int ticnt ;
ticnt = readw ( info - > base + S3C2410_RTCCON ) ;
ticnt & = S3C64XX_RTCCON_TICEN ;
seq_printf ( seq , " periodic_IRQ \t : %s \n " , ticnt ? " yes " : " no " ) ;
}
static void s3c24xx_rtc_save_tick_cnt ( struct s3c_rtc * info )
{
info - > ticnt_save = readb ( info - > base + S3C2410_TICNT ) ;
}
static void s3c24xx_rtc_restore_tick_cnt ( struct s3c_rtc * info )
{
writeb ( info - > ticnt_save , info - > base + S3C2410_TICNT ) ;
}
static void s3c6410_rtc_save_tick_cnt ( struct s3c_rtc * info )
{
info - > ticnt_en_save = readw ( info - > base + S3C2410_RTCCON ) ;
info - > ticnt_en_save & = S3C64XX_RTCCON_TICEN ;
info - > ticnt_save = readl ( info - > base + S3C2410_TICNT ) ;
}
static void s3c6410_rtc_restore_tick_cnt ( struct s3c_rtc * info )
{
unsigned int con ;
writel ( info - > ticnt_save , info - > base + S3C2410_TICNT ) ;
if ( info - > ticnt_en_save ) {
con = readw ( info - > base + S3C2410_RTCCON ) ;
writew ( con | info - > ticnt_en_save ,
info - > base + S3C2410_RTCCON ) ;
}
}
static struct s3c_rtc_data const s3c2410_rtc_data = {
. max_user_freq = 128 ,
. irq_handler = s3c24xx_rtc_irq ,
. set_freq = s3c2410_rtc_setfreq ,
. enable_tick = s3c24xx_rtc_enable_tick ,
. save_tick_cnt = s3c24xx_rtc_save_tick_cnt ,
. restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt ,
. enable = s3c24xx_rtc_enable ,
. disable = s3c24xx_rtc_disable ,
} ;
static struct s3c_rtc_data const s3c2416_rtc_data = {
. max_user_freq = 32768 ,
. irq_handler = s3c24xx_rtc_irq ,
. set_freq = s3c2416_rtc_setfreq ,
. enable_tick = s3c24xx_rtc_enable_tick ,
. select_tick_clk = s3c2416_rtc_select_tick_clk ,
. save_tick_cnt = s3c24xx_rtc_save_tick_cnt ,
. restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt ,
. enable = s3c24xx_rtc_enable ,
. disable = s3c24xx_rtc_disable ,
} ;
static struct s3c_rtc_data const s3c2443_rtc_data = {
. max_user_freq = 32768 ,
. irq_handler = s3c24xx_rtc_irq ,
. set_freq = s3c2443_rtc_setfreq ,
. enable_tick = s3c24xx_rtc_enable_tick ,
. select_tick_clk = s3c2416_rtc_select_tick_clk ,
. save_tick_cnt = s3c24xx_rtc_save_tick_cnt ,
. restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt ,
. enable = s3c24xx_rtc_enable ,
. disable = s3c24xx_rtc_disable ,
} ;
static struct s3c_rtc_data const s3c6410_rtc_data = {
. max_user_freq = 32768 ,
. irq_handler = s3c6410_rtc_irq ,
. set_freq = s3c6410_rtc_setfreq ,
. enable_tick = s3c6410_rtc_enable_tick ,
. save_tick_cnt = s3c6410_rtc_save_tick_cnt ,
. restore_tick_cnt = s3c6410_rtc_restore_tick_cnt ,
. enable = s3c24xx_rtc_enable ,
. disable = s3c6410_rtc_disable ,
2012-04-12 23:49:14 +04:00
} ;
2011-10-24 16:49:04 +04:00
static const struct of_device_id s3c_rtc_dt_match [ ] = {
2011-12-24 05:52:14 +04:00
{
2012-04-12 23:49:14 +04:00
. compatible = " samsung,s3c2410-rtc " ,
2014-10-14 02:52:33 +04:00
. data = ( void * ) & s3c2410_rtc_data ,
2011-12-24 05:52:19 +04:00
} , {
2012-04-12 23:49:14 +04:00
. compatible = " samsung,s3c2416-rtc " ,
2014-10-14 02:52:33 +04:00
. data = ( void * ) & s3c2416_rtc_data ,
2011-12-24 05:52:19 +04:00
} , {
2012-04-12 23:49:14 +04:00
. compatible = " samsung,s3c2443-rtc " ,
2014-10-14 02:52:33 +04:00
. data = ( void * ) & s3c2443_rtc_data ,
2011-12-24 05:52:14 +04:00
} , {
2012-04-12 23:49:14 +04:00
. compatible = " samsung,s3c6410-rtc " ,
2014-10-14 02:52:33 +04:00
. data = ( void * ) & s3c6410_rtc_data ,
2011-12-24 05:52:14 +04:00
} ,
2014-10-14 02:52:33 +04:00
{ /* sentinel */ } ,
2011-10-24 16:49:04 +04:00
} ;
MODULE_DEVICE_TABLE ( of , s3c_rtc_dt_match ) ;
2010-05-25 01:33:43 +04:00
static struct platform_driver s3c_rtc_driver = {
2006-07-01 15:36:26 +04:00
. probe = s3c_rtc_probe ,
2012-12-22 01:09:38 +04:00
. remove = s3c_rtc_remove ,
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. driver = {
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. name = " s3c-rtc " ,
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. owner = THIS_MODULE ,
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. pm = & s3c_rtc_pm_ops ,
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. of_match_table = of_match_ptr ( s3c_rtc_dt_match ) ,
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} ,
} ;
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module_platform_driver ( s3c_rtc_driver ) ;
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MODULE_DESCRIPTION ( " Samsung S3C RTC Driver " ) ;
MODULE_AUTHOR ( " Ben Dooks <ben@simtec.co.uk> " ) ;
MODULE_LICENSE ( " GPL " ) ;
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MODULE_ALIAS ( " platform:s3c2410-rtc " ) ;