1/* $NetBSD: imx_ccm_extclk.c,v 1.1 2020/12/23 14:42:38 skrll Exp $ */ 2 3/*- 4 * Copyright (c) 2020 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__KERNEL_RCSID(0, "$NetBSD: imx_ccm_extclk.c,v 1.1 2020/12/23 14:42:38 skrll Exp $"); 31 32#include <sys/param.h> 33#include <sys/bus.h> 34 35#include <dev/clk/clk_backend.h> 36 37#include <arm/nxp/imx_ccm.h> 38 39#include <dev/fdt/fdtvar.h> 40 41int 42imx_ccm_extclk_enable(struct imx_ccm_softc *sc, struct imx_ccm_clk *clk, 43 int enable) 44{ 45 struct clk *extclk; 46 47 KASSERT(clk->type == IMX_CCM_EXTCLK); 48 49 if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 50 return ENXIO; 51 52 return clk_enable(extclk); 53} 54 55u_int 56imx_ccm_extclk_get_rate(struct imx_ccm_softc *sc, 57 struct imx_ccm_clk *clk) 58{ 59 struct clk *extclk; 60 61 KASSERT(clk->type == IMX_CCM_EXTCLK); 62 63 if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 64 return 0; 65 66 return clk_get_rate(extclk); 67} 68 69int 70imx_ccm_extclk_set_rate(struct imx_ccm_softc *sc, 71 struct imx_ccm_clk *clk, u_int rate) 72{ 73 struct clk *extclk; 74 75 KASSERT(clk->type == IMX_CCM_EXTCLK); 76 77 if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 78 return ENXIO; 79 80 return clk_set_rate(extclk, rate); 81} 82 83const char * 84imx_ccm_extclk_get_parent(struct imx_ccm_softc *sc, 85 struct imx_ccm_clk *clk) 86{ 87 struct clk *extclk, *clkp; 88 89 KASSERT(clk->type == IMX_CCM_EXTCLK); 90 91 if ((extclk = fdtbus_clock_byname(clk->u.extclk)) == NULL) 92 return NULL; 93 94 clkp = clk_get_parent(extclk); 95 if (clkp == NULL) 96 return NULL; 97 98 return clkp->name; 99} 100