#include <linux/comedi/comedidev.h>
#include <linux/comedi/comedi_8254.h>
+#ifdef CONFIG_HAS_IOPORT
+
static unsigned int i8254_io8_cb(struct comedi_8254 *i8254, int dir,
unsigned int reg, unsigned int val)
{
}
}
+#endif /* CONFIG_HAS_IOPORT */
+
static unsigned int i8254_mmio8_cb(struct comedi_8254 *i8254, int dir,
unsigned int reg, unsigned int val)
{
return i8254;
}
+#ifdef CONFIG_HAS_IOPORT
+
/**
* comedi_8254_io_alloc - allocate and initialize the 8254 device for pio access
* @iobase: port I/O base address
}
EXPORT_SYMBOL_GPL(comedi_8254_io_alloc);
+#endif /* CONFIG_HAS_IOPORT */
+
/**
* comedi_8254_mm_alloc - allocate and initialize the 8254 device for mmio access
* @mmio: memory mapped I/O base address
#define _COMEDI_8254_H
#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/err.h>
struct comedi_device;
struct comedi_insn;
void comedi_8254_subdevice_init(struct comedi_subdevice *s,
struct comedi_8254 *i8254);
+#ifdef CONFIG_HAS_IOPORT
struct comedi_8254 *comedi_8254_io_alloc(unsigned long iobase,
unsigned int osc_base,
unsigned int iosize,
unsigned int regshift);
+#else
+static inline struct comedi_8254 *comedi_8254_io_alloc(unsigned long iobase,
+ unsigned int osc_base,
+ unsigned int iosize,
+ unsigned int regshift)
+{
+ return ERR_PTR(-ENXIO);
+}
+#endif
+
struct comedi_8254 *comedi_8254_mm_alloc(void __iomem *mmio,
unsigned int osc_base,
unsigned int iosize,