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sunxi_ccu_gate.c revision 1.2.8.2 
      1  1.2.8.2  jdolecek /* $NetBSD: sunxi_ccu_gate.c,v 1.2.8.2 2017/12/03 11:35:56 jdolecek Exp $ */
      2  1.2.8.2  jdolecek 
      3  1.2.8.2  jdolecek /*-
      4  1.2.8.2  jdolecek  * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca>
      5  1.2.8.2  jdolecek  * All rights reserved.
      6  1.2.8.2  jdolecek  *
      7  1.2.8.2  jdolecek  * Redistribution and use in source and binary forms, with or without
      8  1.2.8.2  jdolecek  * modification, are permitted provided that the following conditions
      9  1.2.8.2  jdolecek  * are met:
     10  1.2.8.2  jdolecek  * 1. Redistributions of source code must retain the above copyright
     11  1.2.8.2  jdolecek  *    notice, this list of conditions and the following disclaimer.
     12  1.2.8.2  jdolecek  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.2.8.2  jdolecek  *    notice, this list of conditions and the following disclaimer in the
     14  1.2.8.2  jdolecek  *    documentation and/or other materials provided with the distribution.
     15  1.2.8.2  jdolecek  *
     16  1.2.8.2  jdolecek  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.2.8.2  jdolecek  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.2.8.2  jdolecek  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.2.8.2  jdolecek  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.2.8.2  jdolecek  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  1.2.8.2  jdolecek  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  1.2.8.2  jdolecek  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  1.2.8.2  jdolecek  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  1.2.8.2  jdolecek  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.2.8.2  jdolecek  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.2.8.2  jdolecek  * SUCH DAMAGE.
     27  1.2.8.2  jdolecek  */
     28  1.2.8.2  jdolecek 
     29  1.2.8.2  jdolecek #include <sys/cdefs.h>
     30  1.2.8.2  jdolecek __KERNEL_RCSID(0, "$NetBSD: sunxi_ccu_gate.c,v 1.2.8.2 2017/12/03 11:35:56 jdolecek Exp $");
     31  1.2.8.2  jdolecek 
     32  1.2.8.2  jdolecek #include <sys/param.h>
     33  1.2.8.2  jdolecek #include <sys/bus.h>
     34  1.2.8.2  jdolecek 
     35  1.2.8.2  jdolecek #include <dev/clk/clk_backend.h>
     36  1.2.8.2  jdolecek 
     37  1.2.8.2  jdolecek #include <arm/sunxi/sunxi_ccu.h>
     38  1.2.8.2  jdolecek 
     39  1.2.8.2  jdolecek int
     40  1.2.8.2  jdolecek sunxi_ccu_gate_enable(struct sunxi_ccu_softc *sc, struct sunxi_ccu_clk *clk,
     41  1.2.8.2  jdolecek     int enable)
     42  1.2.8.2  jdolecek {
     43  1.2.8.2  jdolecek 	struct sunxi_ccu_gate *gate = &clk->u.gate;
     44  1.2.8.2  jdolecek 	uint32_t val;
     45  1.2.8.2  jdolecek 
     46  1.2.8.2  jdolecek 	KASSERT(clk->type == SUNXI_CCU_GATE);
     47  1.2.8.2  jdolecek 
     48  1.2.8.2  jdolecek 	val = CCU_READ(sc, gate->reg);
     49  1.2.8.2  jdolecek 	if (enable)
     50  1.2.8.2  jdolecek 		val |= gate->mask;
     51  1.2.8.2  jdolecek 	else
     52  1.2.8.2  jdolecek 		val &= ~gate->mask;
     53  1.2.8.2  jdolecek 	CCU_WRITE(sc, gate->reg, val);
     54  1.2.8.2  jdolecek 
     55  1.2.8.2  jdolecek 	return 0;
     56  1.2.8.2  jdolecek }
     57  1.2.8.2  jdolecek 
     58  1.2.8.2  jdolecek const char *
     59  1.2.8.2  jdolecek sunxi_ccu_gate_get_parent(struct sunxi_ccu_softc *sc, struct sunxi_ccu_clk *clk)
     60  1.2.8.2  jdolecek {
     61  1.2.8.2  jdolecek 	struct sunxi_ccu_gate *gate = &clk->u.gate;
     62  1.2.8.2  jdolecek 
     63  1.2.8.2  jdolecek 	KASSERT(clk->type == SUNXI_CCU_GATE);
     64  1.2.8.2  jdolecek 
     65  1.2.8.2  jdolecek 	return gate->parent;
     66  1.2.8.2  jdolecek }
     67