1 1.2 jmcneill /* $NetBSD: sunxi_ccu_gate.c,v 1.2 2017/06/29 17:06:21 jmcneill Exp $ */ 2 1.1 jmcneill 3 1.1 jmcneill /*- 4 1.1 jmcneill * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.1 jmcneill * All rights reserved. 6 1.1 jmcneill * 7 1.1 jmcneill * Redistribution and use in source and binary forms, with or without 8 1.1 jmcneill * modification, are permitted provided that the following conditions 9 1.1 jmcneill * are met: 10 1.1 jmcneill * 1. Redistributions of source code must retain the above copyright 11 1.1 jmcneill * notice, this list of conditions and the following disclaimer. 12 1.1 jmcneill * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 jmcneill * notice, this list of conditions and the following disclaimer in the 14 1.1 jmcneill * documentation and/or other materials provided with the distribution. 15 1.1 jmcneill * 16 1.1 jmcneill * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1 jmcneill * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1 jmcneill * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1 jmcneill * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1 jmcneill * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.1 jmcneill * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.1 jmcneill * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.1 jmcneill * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.1 jmcneill * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1 jmcneill * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1 jmcneill * SUCH DAMAGE. 27 1.1 jmcneill */ 28 1.1 jmcneill 29 1.1 jmcneill #include <sys/cdefs.h> 30 1.2 jmcneill __KERNEL_RCSID(0, "$NetBSD: sunxi_ccu_gate.c,v 1.2 2017/06/29 17:06:21 jmcneill Exp $"); 31 1.1 jmcneill 32 1.1 jmcneill #include <sys/param.h> 33 1.1 jmcneill #include <sys/bus.h> 34 1.1 jmcneill 35 1.1 jmcneill #include <dev/clk/clk_backend.h> 36 1.1 jmcneill 37 1.1 jmcneill #include <arm/sunxi/sunxi_ccu.h> 38 1.1 jmcneill 39 1.1 jmcneill int 40 1.1 jmcneill sunxi_ccu_gate_enable(struct sunxi_ccu_softc *sc, struct sunxi_ccu_clk *clk, 41 1.1 jmcneill int enable) 42 1.1 jmcneill { 43 1.1 jmcneill struct sunxi_ccu_gate *gate = &clk->u.gate; 44 1.1 jmcneill uint32_t val; 45 1.1 jmcneill 46 1.1 jmcneill KASSERT(clk->type == SUNXI_CCU_GATE); 47 1.1 jmcneill 48 1.1 jmcneill val = CCU_READ(sc, gate->reg); 49 1.1 jmcneill if (enable) 50 1.1 jmcneill val |= gate->mask; 51 1.1 jmcneill else 52 1.1 jmcneill val &= ~gate->mask; 53 1.1 jmcneill CCU_WRITE(sc, gate->reg, val); 54 1.1 jmcneill 55 1.1 jmcneill return 0; 56 1.1 jmcneill } 57 1.1 jmcneill 58 1.1 jmcneill const char * 59 1.1 jmcneill sunxi_ccu_gate_get_parent(struct sunxi_ccu_softc *sc, struct sunxi_ccu_clk *clk) 60 1.1 jmcneill { 61 1.1 jmcneill struct sunxi_ccu_gate *gate = &clk->u.gate; 62 1.1 jmcneill 63 1.1 jmcneill KASSERT(clk->type == SUNXI_CCU_GATE); 64 1.1 jmcneill 65 1.2 jmcneill return gate->parent; 66 1.1 jmcneill } 67