d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add TWI attachment for FDT. We're only matching the SAMG20 device for

Browse Source 
now, others to follow.
This commit is contained in:
Warner Losh 2014-02-09 21:01:10 +00:00
parent bf5c70c929
commit 3526a97bba
1 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
sys/arm/at91/at91_twi.c
View File

@ -23,6 +23,8 @@
* SUCH DAMAGE.
*/
#include "opt_platform.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
@ -46,6 +48,12 @@ __FBSDID("$FreeBSD$");
#include <dev/iicbus/iicbus.h>
#include "iicbus_if.h"
#ifdef FDT
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#endif
#define TWI_SLOW_CLOCK 1500
#define TWI_FAST_CLOCK 45000
#define TWI_FASTEST_CLOCK 90000
@ -104,7 +112,11 @@ static void at91_twi_deactivate(device_t dev);
static int
at91_twi_probe(device_t dev)
{
#ifdef FDT
/* XXXX need a whole list, since there's at least 4 different ones */
if (!ofw_bus_is_compatible(dev, "atmel,at91sam9g20-i2c"))
return (ENXIO);
#endif
device_set_desc(dev, "TWI");
return (0);
}
@ -397,7 +409,12 @@ static driver_t at91_twi_driver = {
sizeof(struct at91_twi_softc),
};
#ifdef FDT
DRIVER_MODULE(at91_twi, simplebus, at91_twi_driver, at91_twi_devclass, NULL,
NULL);
#else
DRIVER_MODULE(at91_twi, atmelarm, at91_twi_driver, at91_twi_devclass, NULL,
NULL);
#endif
DRIVER_MODULE(iicbus, at91_twi, iicbus_driver, iicbus_devclass, NULL, NULL);
MODULE_DEPEND(at91_twi, iicbus, 1, 1, 1);