imx6_clk.c revision 1.1.2.2
1 1.1.2.2 thorpej /* $NetBSD: imx6_clk.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) 2019 Genetec Corporation. All rights reserved. 5 1.1.2.2 thorpej * Written by Hashimoto Kenichi for Genetec Corporation. 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: imx6_clk.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 "opt_fdt.h" 33 1.1.2.2 thorpej 34 1.1.2.2 thorpej #include <sys/types.h> 35 1.1.2.2 thorpej #include <sys/time.h> 36 1.1.2.2 thorpej #include <sys/bus.h> 37 1.1.2.2 thorpej #include <sys/device.h> 38 1.1.2.2 thorpej #include <sys/sysctl.h> 39 1.1.2.2 thorpej #include <sys/cpufreq.h> 40 1.1.2.2 thorpej #include <sys/malloc.h> 41 1.1.2.2 thorpej #include <sys/kmem.h> 42 1.1.2.2 thorpej #include <sys/param.h> 43 1.1.2.2 thorpej 44 1.1.2.2 thorpej #include <arm/nxp/imx6_ccmvar.h> 45 1.1.2.2 thorpej 46 1.1.2.2 thorpej #include <dev/clk/clk_backend.h> 47 1.1.2.2 thorpej #include <dev/fdt/fdtvar.h> 48 1.1.2.2 thorpej 49 1.1.2.2 thorpej static struct clk *imx6_clk_decode(device_t, int, const void *, size_t); 50 1.1.2.2 thorpej 51 1.1.2.2 thorpej static const struct fdtbus_clock_controller_func imx6_ccm_fdtclock_funcs = { 52 1.1.2.2 thorpej .decode = imx6_clk_decode 53 1.1.2.2 thorpej }; 54 1.1.2.2 thorpej 55 1.1.2.2 thorpej static struct clk * 56 1.1.2.2 thorpej imx6_clk_decode(device_t dev, int cc_phandle, const void *data, size_t len) 57 1.1.2.2 thorpej { 58 1.1.2.2 thorpej struct clk *clk; 59 1.1.2.2 thorpej 60 1.1.2.2 thorpej /* #clock-cells should be 1 */ 61 1.1.2.2 thorpej if (len != 4) 62 1.1.2.2 thorpej return NULL; 63 1.1.2.2 thorpej 64 1.1.2.2 thorpej const u_int clock_id = be32dec(data); 65 1.1.2.2 thorpej 66 1.1.2.2 thorpej clk = imx6_get_clock_by_id(clock_id); 67 1.1.2.2 thorpej if (clk) 68 1.1.2.2 thorpej return clk; 69 1.1.2.2 thorpej 70 1.1.2.2 thorpej return NULL; 71 1.1.2.2 thorpej } 72 1.1.2.2 thorpej 73 1.1.2.2 thorpej static void 74 1.1.2.2 thorpej imx6_clk_fixed_from_fdt(const char *name) 75 1.1.2.2 thorpej { 76 1.1.2.2 thorpej struct imx6_clk *iclk = (struct imx6_clk *)imx6_get_clock(name); 77 1.1.2.2 thorpej 78 1.1.2.2 thorpej KASSERT(iclk != NULL); 79 1.1.2.2 thorpej 80 1.1.2.2 thorpej char *path = kmem_asprintf("/clocks/%s", name); 81 1.1.2.2 thorpej int phandle = OF_finddevice(path); 82 1.1.2.2 thorpej kmem_free(path, strlen(path) + 1); 83 1.1.2.2 thorpej 84 1.1.2.2 thorpej if (of_getprop_uint32(phandle, "clock-frequency", &iclk->clk.fixed.rate) != 0) 85 1.1.2.2 thorpej iclk->clk.fixed.rate = 0; 86 1.1.2.2 thorpej } 87 1.1.2.2 thorpej 88 1.1.2.2 thorpej static int imx6ccm_match(device_t, cfdata_t, void *); 89 1.1.2.2 thorpej static void imx6ccm_attach(device_t, device_t, void *); 90 1.1.2.2 thorpej 91 1.1.2.2 thorpej CFATTACH_DECL_NEW(imx6ccm, sizeof(struct imx6ccm_softc), 92 1.1.2.2 thorpej imx6ccm_match, imx6ccm_attach, NULL, NULL); 93 1.1.2.2 thorpej 94 1.1.2.2 thorpej static int 95 1.1.2.2 thorpej imx6ccm_match(device_t parent, cfdata_t cfdata, void *aux) 96 1.1.2.2 thorpej { 97 1.1.2.2 thorpej const char * const compatible[] = { "fsl,imx6q-ccm", NULL }; 98 1.1.2.2 thorpej struct fdt_attach_args * const faa = aux; 99 1.1.2.2 thorpej 100 1.1.2.2 thorpej return of_match_compatible(faa->faa_phandle, compatible); 101 1.1.2.2 thorpej } 102 1.1.2.2 thorpej 103 1.1.2.2 thorpej static void 104 1.1.2.2 thorpej imx6ccm_attach(device_t parent, device_t self, void *aux) 105 1.1.2.2 thorpej { 106 1.1.2.2 thorpej struct imx6ccm_softc * const sc = device_private(self); 107 1.1.2.2 thorpej struct fdt_attach_args * const faa = aux; 108 1.1.2.2 thorpej bus_addr_t addr; 109 1.1.2.2 thorpej bus_size_t size; 110 1.1.2.2 thorpej 111 1.1.2.2 thorpej if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) { 112 1.1.2.2 thorpej aprint_error(": couldn't get registers\n"); 113 1.1.2.2 thorpej return; 114 1.1.2.2 thorpej } 115 1.1.2.2 thorpej 116 1.1.2.2 thorpej sc->sc_dev = self; 117 1.1.2.2 thorpej sc->sc_iot = faa->faa_bst; 118 1.1.2.2 thorpej 119 1.1.2.2 thorpej if (bus_space_map(sc->sc_iot, addr, size, 0, &sc->sc_ioh)) { 120 1.1.2.2 thorpej aprint_error(": can't map ccm registers\n"); 121 1.1.2.2 thorpej return; 122 1.1.2.2 thorpej } 123 1.1.2.2 thorpej 124 1.1.2.2 thorpej int phandle = OF_finddevice("/soc/aips-bus/anatop"); 125 1.1.2.2 thorpej fdtbus_get_reg(phandle, 0, &addr, &size); 126 1.1.2.2 thorpej 127 1.1.2.2 thorpej if (bus_space_map(sc->sc_iot, addr, size, 0, &sc->sc_ioh_analog)) { 128 1.1.2.2 thorpej aprint_error(": can't map anatop registers\n"); 129 1.1.2.2 thorpej return; 130 1.1.2.2 thorpej } 131 1.1.2.2 thorpej 132 1.1.2.2 thorpej imx6ccm_attach_common(self); 133 1.1.2.2 thorpej 134 1.1.2.2 thorpej aprint_naive("\n"); 135 1.1.2.2 thorpej aprint_normal(": Clock Control Module\n"); 136 1.1.2.2 thorpej 137 1.1.2.2 thorpej imx6_clk_fixed_from_fdt("ckil"); 138 1.1.2.2 thorpej imx6_clk_fixed_from_fdt("ckih"); 139 1.1.2.2 thorpej imx6_clk_fixed_from_fdt("osc"); 140 1.1.2.2 thorpej imx6_clk_fixed_from_fdt("anaclk1"); 141 1.1.2.2 thorpej imx6_clk_fixed_from_fdt("anaclk2"); 142 1.1.2.2 thorpej 143 1.1.2.2 thorpej fdtbus_register_clock_controller(self, faa->faa_phandle, 144 1.1.2.2 thorpej &imx6_ccm_fdtclock_funcs); 145 1.1.2.2 thorpej } 146 1.1.2.2 thorpej 147
Indexes created Wed Oct 01 19:09:53 GMT 2025