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ds133x: Introduce device_identify method; update NOTES.

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Obtained from:	Semihalf
This commit is contained in:
Rafal Jaworowski 2008-09-08 10:40:48 +00:00
parent 36fd475c64
commit 286fa44565
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=182870
2 changed files with 21 additions and 1 deletions
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8
sys/conf/NOTES
View File

@ -2276,6 +2276,14 @@ device ic
device iic
device iicsmb # smb over i2c bridge
# I2C peripheral devices
#
# ds133x Dallas Semiconductor DS1337, DS1338 and DS1339 RTC
# ds1672 Dallas Semiconductor DS1672 RTC
#
device ds133x
device ds1672
# Parallel-Port Bus
#
# Parallel port bus support is provided by the `ppbus' device.

14
sys/dev/iicbus/ds133x.c
View File

@ -53,6 +53,8 @@ __FBSDID("$FreeBSD$");
#include "iicbus_if.h"
#include "clock_if.h"
#define DS133X_DEVNAME "rtc"
#define DS133X_ADDR 0xd0 /* slave address */
#define DS133X_DATE_REG 0x0
#define DS133X_CTRL_REG 0x0e
@ -217,6 +219,15 @@ ds133x_init(device_t dev, uint8_t cs_reg, uint8_t cs_bit, uint8_t osf_reg,
return (0);
}
static void
ds133x_identify(driver_t *driver, device_t parent)
{
if (device_find_child(parent, DS133X_DEVNAME, -1) == NULL)
BUS_ADD_CHILD(parent, 0, DS133X_DEVNAME, -1);
}
static int
ds133x_probe(device_t dev)
{
@ -336,6 +347,7 @@ ds133x_settime(device_t dev, struct timespec *ts)
}
static device_method_t ds133x_methods[] = {
DEVMETHOD(device_identify, ds133x_identify),
DEVMETHOD(device_probe, ds133x_probe),
DEVMETHOD(device_attach, ds133x_attach),
@ -346,7 +358,7 @@ static device_method_t ds133x_methods[] = {
};
static driver_t ds133x_driver = {
"rtc",
DS133X_DEVNAME,
ds133x_methods,
sizeof(struct ds133x_softc),
};