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Code Issues Releases Activity

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

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now, others to follow.
This commit is contained in:
Warner Losh 2014-02-09 21:01:10 +00:00
parent bf5c70c929
commit 3526a97bba
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=261687
1 changed files with 18 additions and 1 deletions
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19
sys/arm/at91/at91_twi.c
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@ -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);