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sys/arm64/freescale/imx/clk/imx_clk_mux.c
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/*- | |||||
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD | |||||
* | |||||
* Copyright 2016 Michal Meloun <mmel@FreeBSD.org> | |||||
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
#include <sys/param.h> | |||||
#include <sys/conf.h> | |||||
#include <sys/bus.h> | |||||
#include <sys/kernel.h> | |||||
#include <sys/systm.h> | |||||
#include <machine/bus.h> | |||||
#include <dev/extres/clk/clk.h> | |||||
#include <arm64/freescale/imx/clk/imx_clk_mux.h> | |||||
#include "clkdev_if.h" | |||||
#define WR4(_clk, off, val) \ | |||||
CLKDEV_WRITE_4(clknode_get_device(_clk), off, val) | |||||
#define RD4(_clk, off, val) \ | |||||
CLKDEV_READ_4(clknode_get_device(_clk), off, val) | |||||
#define MD4(_clk, off, clr, set ) \ | |||||
CLKDEV_MODIFY_4(clknode_get_device(_clk), off, clr, set) | |||||
#define DEVICE_LOCK(_clk) \ | |||||
CLKDEV_DEVICE_LOCK(clknode_get_device(_clk)) | |||||
#define DEVICE_UNLOCK(_clk) \ | |||||
CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk)) | |||||
static int imx_clk_mux_init(struct clknode *clk, device_t dev); | |||||
static int imx_clk_mux_set_mux(struct clknode *clk, int idx); | |||||
struct imx_clk_mux_sc { | |||||
uint32_t offset; | |||||
uint32_t shift; | |||||
uint32_t mask; | |||||
int mux_flags; | |||||
}; | |||||
static clknode_method_t imx_clk_mux_methods[] = { | |||||
/* Device interface */ | |||||
CLKNODEMETHOD(clknode_init, imx_clk_mux_init), | |||||
CLKNODEMETHOD(clknode_set_mux, imx_clk_mux_set_mux), | |||||
CLKNODEMETHOD_END | |||||
}; | |||||
DEFINE_CLASS_1(imx_clk_mux, imx_clk_mux_class, imx_clk_mux_methods, | |||||
sizeof(struct imx_clk_mux_sc), clknode_class); | |||||
static int | |||||
imx_clk_mux_init(struct clknode *clk, device_t dev) | |||||
{ | |||||
uint32_t reg; | |||||
struct imx_clk_mux_sc *sc; | |||||
int rv; | |||||
sc = clknode_get_softc(clk); | |||||
DEVICE_LOCK(clk); | |||||
rv = RD4(clk, sc->offset, ®); | |||||
DEVICE_UNLOCK(clk); | |||||
if (rv != 0) { | |||||
return (rv); | |||||
} | |||||
reg = (reg >> sc->shift) & sc->mask; | |||||
clknode_init_parent_idx(clk, reg); | |||||
return(0); | |||||
} | |||||
static int | |||||
imx_clk_mux_set_mux(struct clknode *clk, int idx) | |||||
{ | |||||
uint32_t reg; | |||||
struct imx_clk_mux_sc *sc; | |||||
int rv; | |||||
sc = clknode_get_softc(clk); | |||||
DEVICE_LOCK(clk); | |||||
rv = MD4(clk, sc->offset, sc->mask << sc->shift, | |||||
((idx & sc->mask) << sc->shift)); | |||||
if (rv != 0) { | |||||
DEVICE_UNLOCK(clk); | |||||
return (rv); | |||||
} | |||||
RD4(clk, sc->offset, ®); | |||||
DEVICE_UNLOCK(clk); | |||||
return(0); | |||||
} | |||||
int | |||||
imx_clk_mux_register(struct clkdom *clkdom, struct imx_clk_mux_def *clkdef) | |||||
{ | |||||
struct clknode *clk; | |||||
struct imx_clk_mux_sc *sc; | |||||
clk = clknode_create(clkdom, &imx_clk_mux_class, &clkdef->clkdef); | |||||
if (clk == NULL) | |||||
return (1); | |||||
sc = clknode_get_softc(clk); | |||||
sc->offset = clkdef->offset; | |||||
sc->shift = clkdef->shift; | |||||
sc->mask = (1 << clkdef->width) - 1; | |||||
sc->mux_flags = clkdef->mux_flags; | |||||
clknode_register(clkdom, clk); | |||||
return (0); | |||||
} |