freebsd-dev/sys/arm/allwinner/clk/aw_codecclk.c
Michal Meloun dac935533b EXTRES: Add OF node as argument to all <foo>_get_by_ofw_<bar>() functions.
In some cases, the driver must handle given properties located in
specific OF subnode. Instead of creating duplicate set of function, add
'node' as argument to existing functions, defaulting it to device OF node.

MFC after: 3 weeks
2016-07-10 18:28:15 +00:00

165 lines
4.1 KiB
C

/*-
* Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Allwinner CODEC clock
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/ofw_subr.h>
#include <dev/extres/clk/clk_gate.h>
#include <dev/extres/hwreset/hwreset.h>
#include "clkdev_if.h"
#define SCLK_GATING_SHIFT 31
static struct ofw_compat_data compat_data[] = {
{ "allwinner,sun4i-a10-codec-clk", 1 },
{ NULL, 0 }
};
static int
aw_codecclk_create(device_t dev, bus_addr_t paddr, struct clkdom *clkdom,
const char *pclkname, const char *clkname, int index)
{
const char *parent_names[1] = { pclkname };
struct clk_gate_def def;
memset(&def, 0, sizeof(def));
def.clkdef.id = index;
def.clkdef.name = clkname;
def.clkdef.parent_names = parent_names;
def.clkdef.parent_cnt = 1;
def.offset = paddr;
def.shift = SCLK_GATING_SHIFT;
def.mask = 1;
def.on_value = 1;
def.off_value = 0;
return (clknode_gate_register(clkdom, &def));
}
static int
aw_codecclk_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
device_set_desc(dev, "Allwinner CODEC Clock");
return (BUS_PROBE_DEFAULT);
}
static int
aw_codecclk_attach(device_t dev)
{
struct clkdom *clkdom;
const char **names;
int nout, error;
uint32_t *indices;
clk_t clk_parent;
bus_addr_t paddr;
bus_size_t psize;
phandle_t node;
node = ofw_bus_get_node(dev);
indices = NULL;
if (ofw_reg_to_paddr(node, 0, &paddr, &psize, NULL) != 0) {
device_printf(dev, "cannot parse 'reg' property\n");
return (ENXIO);
}
clkdom = clkdom_create(dev);
nout = clk_parse_ofw_out_names(dev, node, &names, &indices);
if (nout != 1) {
device_printf(dev, "must have exactly one output clock\n");
error = ENOENT;
goto fail;
}
error = clk_get_by_ofw_index(dev, 0, 0, &clk_parent);
if (error != 0) {
device_printf(dev, "cannot parse clock parent\n");
return (ENXIO);
}
error = aw_codecclk_create(dev, paddr, clkdom,
clk_get_name(clk_parent), names[0], 1);
if (clkdom_finit(clkdom) != 0) {
device_printf(dev, "cannot finalize clkdom initialization\n");
error = ENXIO;
goto fail;
}
if (bootverbose)
clkdom_dump(clkdom);
return (0);
fail:
return (error);
}
static device_method_t aw_codecclk_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, aw_codecclk_probe),
DEVMETHOD(device_attach, aw_codecclk_attach),
DEVMETHOD_END
};
static driver_t aw_codecclk_driver = {
"aw_codecclk",
aw_codecclk_methods,
0
};
static devclass_t aw_codecclk_devclass;
EARLY_DRIVER_MODULE(aw_codecclk, simplebus, aw_codecclk_driver,
aw_codecclk_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);