imx_ccm_extclk.c revision 1.1.2.2
1 1.1.2.2 thorpej /* $NetBSD: imx_ccm_extclk.c,v 1.1.2.2 2021/01/03 16:34:52 thorpej Exp $ */ 2 1.1.2.2 thorpej 3 1.1.2.2 thorpej /*- 4 1.1.2.2 thorpej * Copyright (c) 2020 Jared McNeill <jmcneill (at) invisible.ca> 5 1.1.2.2 thorpej * All rights reserved. 6 1.1.2.2 thorpej * 7 1.1.2.2 thorpej * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 thorpej * modification, are permitted provided that the following conditions 9 1.1.2.2 thorpej * are met: 10 1.1.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 thorpej * documentation and/or other materials provided with the distribution. 15 1.1.2.2 thorpej * 16 1.1.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 thorpej * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.2.2 thorpej * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.2.2 thorpej * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1.2.2 thorpej * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.1.2.2 thorpej * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.1.2.2 thorpej * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.1.2.2 thorpej * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.1.2.2 thorpej * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.2.2 thorpej * SUCH DAMAGE. 27 1.1.2.2 thorpej */ 28 1.1.2.2 thorpej 29 1.1.2.2 thorpej #include <sys/cdefs.h> 30 1.1.2.2 thorpej __KERNEL_RCSID(0, "$NetBSD: imx_ccm_extclk.c,v 1.1.2.2 2021/01/03 16:34:52 thorpej Exp $"); 31 1.1.2.2 thorpej 32 1.1.2.2 thorpej #include <sys/param.h> 33 1.1.2.2 thorpej #include <sys/bus.h> 34 1.1.2.2 thorpej 35 1.1.2.2 thorpej #include <dev/clk/clk_backend.h> 36 1.1.2.2 thorpej 37 1.1.2.2 thorpej #include <arm/nxp/imx_ccm.h> 38 1.1.2.2 thorpej 39 1.1.2.2 thorpej #include <dev/fdt/fdtvar.h> 40 1.1.2.2 thorpej 41 1.1.2.2 thorpej int 42 1.1.2.2 thorpej imx_ccm_extclk_enable(struct imx_ccm_softc *sc, struct imx_ccm_clk *clk, 43 1.1.2.2 thorpej int enable) 44 1.1.2.2 thorpej { 45 1.1.2.2 thorpej struct clk *extclk; 46 1.1.2.2 thorpej 47 1.1.2.2 thorpej KASSERT(clk->type == IMX_CCM_EXTCLK); 48 1.1.2.2 thorpej 49 1.1.2.2 thorpej if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 50 1.1.2.2 thorpej return ENXIO; 51 1.1.2.2 thorpej 52 1.1.2.2 thorpej return clk_enable(extclk); 53 1.1.2.2 thorpej } 54 1.1.2.2 thorpej 55 1.1.2.2 thorpej u_int 56 1.1.2.2 thorpej imx_ccm_extclk_get_rate(struct imx_ccm_softc *sc, 57 1.1.2.2 thorpej struct imx_ccm_clk *clk) 58 1.1.2.2 thorpej { 59 1.1.2.2 thorpej struct clk *extclk; 60 1.1.2.2 thorpej 61 1.1.2.2 thorpej KASSERT(clk->type == IMX_CCM_EXTCLK); 62 1.1.2.2 thorpej 63 1.1.2.2 thorpej if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 64 1.1.2.2 thorpej return 0; 65 1.1.2.2 thorpej 66 1.1.2.2 thorpej return clk_get_rate(extclk); 67 1.1.2.2 thorpej } 68 1.1.2.2 thorpej 69 1.1.2.2 thorpej int 70 1.1.2.2 thorpej imx_ccm_extclk_set_rate(struct imx_ccm_softc *sc, 71 1.1.2.2 thorpej struct imx_ccm_clk *clk, u_int rate) 72 1.1.2.2 thorpej { 73 1.1.2.2 thorpej struct clk *extclk; 74 1.1.2.2 thorpej 75 1.1.2.2 thorpej KASSERT(clk->type == IMX_CCM_EXTCLK); 76 1.1.2.2 thorpej 77 1.1.2.2 thorpej if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 78 1.1.2.2 thorpej return ENXIO; 79 1.1.2.2 thorpej 80 1.1.2.2 thorpej return clk_set_rate(extclk, rate); 81 1.1.2.2 thorpej } 82 1.1.2.2 thorpej 83 1.1.2.2 thorpej const char * 84 1.1.2.2 thorpej imx_ccm_extclk_get_parent(struct imx_ccm_softc *sc, 85 1.1.2.2 thorpej struct imx_ccm_clk *clk) 86 1.1.2.2 thorpej { 87 1.1.2.2 thorpej struct clk *extclk, *clkp; 88 1.1.2.2 thorpej 89 1.1.2.2 thorpej KASSERT(clk->type == IMX_CCM_EXTCLK); 90 1.1.2.2 thorpej 91 1.1.2.2 thorpej if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 92 1.1.2.2 thorpej return NULL; 93 1.1.2.2 thorpej 94 1.1.2.2 thorpej clkp = clk_get_parent(extclk); 95 1.1.2.2 thorpej if (clkp == NULL) 96 1.1.2.2 thorpej return NULL; 97 1.1.2.2 thorpej 98 1.1.2.2 thorpej return clkp->name; 99 1.1.2.2 thorpej } 100
Indexes created Tue Sep 30 06:09:59 GMT 2025