#include <linux/proc_fs.h>
#include <linux/miscdevice.h>
#include <linux/spinlock.h>
+#include <linux/capability.h>
#include <linux/device.h>
+ #include <linux/mutex.h>
#include <asm/rtc.h>
#include <asm/semaphore.h>
/*
* rtc_sem protects rtc_inuse and rtc_ops
*/
- static DECLARE_MUTEX(rtc_sem);
+ static DEFINE_MUTEX(rtc_mutex);
static unsigned long rtc_inuse;
static struct rtc_ops *rtc_ops;
{
int ret;
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc_inuse) {
ret = -EBUSY;
rtc_inuse = 1;
}
}
- up(&rtc_sem);
+ mutex_unlock(&rtc_mutex);
return ret;
}
{
int ret = -EBUSY;
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc_ops == NULL) {
rtc_ops = ops;
create_proc_read_entry("driver/rtc", 0, NULL,
rtc_read_proc, ops);
}
- up(&rtc_sem);
+ mutex_unlock(&rtc_mutex);
return ret;
}
void unregister_rtc(struct rtc_ops *rtc)
{
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc == rtc_ops) {
remove_proc_entry("driver/rtc", NULL);
misc_deregister(&rtc_miscdev);
rtc_ops = NULL;
}
- up(&rtc_sem);
+ mutex_unlock(&rtc_mutex);
}
EXPORT_SYMBOL(unregister_rtc);
your boot loader (lilo or loadlin) about how to pass options to the
kernel at boot time.)
+ config SERIAL_AT91
+ bool "AT91RM9200 serial port support"
+ depends on ARM && ARCH_AT91RM9200
+ select SERIAL_CORE
+ help
+ This enables the driver for the on-chip UARTs of the AT91RM9200
+ processor.
+
+ config SERIAL_AT91_CONSOLE
+ bool "Support for console on AT91RM9200 serial port"
+ depends on SERIAL_AT91=y
+ select SERIAL_CORE_CONSOLE
+ help
+ Say Y here if you wish to use a UART on the AT91RM9200 as the system
+ console (the system console is the device which receives all kernel
+ messages and warnings and which allows logins in single user mode).
+
+ config SERIAL_AT91_TTYAT
+ bool "Install as device ttyAT0-4 instead of ttyS0-4"
+ depends on SERIAL_AT91=y
+ help
+ Say Y here if you wish to have the five internal AT91RM9200 UARTs
+ appear as /dev/ttyAT0-4 (major 240, minor 0-4) instead of the
+ normal /dev/ttyS0-4 (major 4, minor 64-68). This is necessary if
+ you also want other UARTs, such as external 8250/16C550 compatible
+ UARTs.
+ The ttySn nodes are legally reserved for the 8250 serial driver
+ but are often misused by other serial drivers.
+
+ To use this, you should create suitable ttyATn device nodes in
+ /dev/, and pass "console=ttyATn" to the kernel.
+
+ Say Y if you have an external 8250/16C550 UART. If unsure, say N.
+
config SERIAL_CLPS711X
tristate "CLPS711X serial port support"
depends on ARM && ARCH_CLPS711X
config SERIAL_JSM
tristate "Digi International NEO PCI Support"
- depends on PCI
+ depends on PCI && BROKEN
select SERIAL_CORE
help
This is a driver for Digi International's Neo series