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Add method for getting of syscon handle from parent device.

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If simple multifuction device also provides syscon interface, its
childern should be able to consume it. Due to this:
- declare coresponding method in syscon interface
- implement it in simple multifunction device driver

MFC after:	1 week
This commit is contained in:
Michal Meloun 2019-08-18 08:08:56 +00:00
parent 3921068f1e
commit 7f8c4c78f5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=351184
3 changed files with 37 additions and 2 deletions
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11
sys/dev/extres/syscon/syscon.c
View File

@ -254,3 +254,14 @@ syscon_get_by_ofw_property(device_t cdev, phandle_t cnode, char *name,
return (0);
}
#endif
int
syscon_get_handle_default(device_t dev, struct syscon **syscon)
{
device_t parent;
parent = device_get_parent(dev);
if (parent == NULL)
return (ENODEV);
return (SYSCON_GET_HANDLE(parent, syscon));
}

9
sys/dev/extres/syscon/syscon_if.m
View File

@ -32,6 +32,7 @@ INTERFACE syscon;
HEADER {
struct syscon;
int syscon_get_handle_default(device_t dev, struct syscon **syscon);
}
METHOD int init {
@ -62,3 +63,11 @@ METHOD int modify_4 {
uint32_t clear_bits;
uint32_t set_bits;
};
/**
* Get syscon handle from parent driver
*/
METHOD int get_handle {
device_t dev;
struct syscon **syscon;
} DEFAULT syscon_get_handle_default;

19
sys/dev/fdt/simple_mfd.c
View File

@ -49,14 +49,16 @@ __FBSDID("$FreeBSD$");
device_t simple_mfd_add_device(device_t dev, phandle_t node, u_int order,
const char *name, int unit, struct simplebus_devinfo *di);
struct simplebus_devinfo *simple_mfd_setup_dinfo(device_t dev, phandle_t node, struct simplebus_devinfo *di);
struct simplebus_devinfo *simple_mfd_setup_dinfo(device_t dev, phandle_t node,
struct simplebus_devinfo *di);
#include "syscon_if.h"
#include <dev/extres/syscon/syscon.h>
MALLOC_DECLARE(M_SYSCON);
static uint32_t simple_mfd_syscon_read_4(struct syscon *syscon, bus_size_t offset);
static uint32_t simple_mfd_syscon_read_4(struct syscon *syscon,
bus_size_t offset);
static int simple_mfd_syscon_write_4(struct syscon *syscon, bus_size_t offset,
uint32_t val);
static int simple_mfd_syscon_modify_4(struct syscon *syscon, bus_size_t offset,
@ -125,6 +127,17 @@ simple_mfd_syscon_modify_4(struct syscon *syscon, bus_size_t offset,
SYSCON_UNLOCK(sc);
return (0);
}
static int
simple_mfd_syscon_get_handle(device_t dev, struct syscon **syscon)
{
struct simple_mfd_softc *sc;
sc = device_get_softc(dev);
*syscon = sc->syscon;
if (syscon == NULL)
return (ENODEV);
return (0);
}
static int
simple_mfd_probe(device_t dev)
@ -278,6 +291,8 @@ simple_mfd_add_device(device_t dev, phandle_t node, u_int order,
}
static device_method_t simple_mfd_methods[] = {
/* syscon interface */
DEVMETHOD(syscon_get_handle, simple_mfd_syscon_get_handle),
/* Device interface */
DEVMETHOD(device_probe, simple_mfd_probe),
DEVMETHOD(device_attach, simple_mfd_attach),