INTERSIL7170(4) | Device Drivers Manual | INTERSIL7170(4) |
intersil7170
—
Intersil ICM7170 time-of-day clock driver
#include
<dev/ic/intersil7170reg.h>
#include
<dev/ic/intersil7170var.h>
define intersil7170
file dev/ic/intersil7170.c intersil7170
The intersil7170
driver provides access to
the Intersil ICM7170 time-of-day clock chip. Access methods to retrieve and
set date and time are provided through the
TODR
interface defined in
todr(9).
To tie an instance of this device to the
system, use the
intersil7170_attach
()
function and the intersil7170_softc structure defined
as follows:
void
intersil7170_attach
(struct
intersil7170_softc *)
struct intersil7170_softc { struct device sc_dev; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; struct todr_chip_handle sc_handle; u_int sc_year0; u_int sc_flag; };
todr_attach
()
function to register todr(9)
interface.Note that if the resulting date retrieved with the todr_gettime() method is earlier that January 1, 1970, the driver will assume that the chip's year counter actually represents a year in the 21st century. This behaviour can be overridden by setting the INTERSIL7170_NO_CENT_ADJUST flag in sc_flag.
The intersil7170
driver first appeared in
NetBSD 1.5.
The intersil7170
driver was written by
Paul Kranenburg ⟨pk@NetBSD.org⟩.
October 1, 2006 | NetBSD 10.99 |