cpufreq_dt.c revision 1.2.2.2
1 1.2.2.2 jdolecek /* $NetBSD: cpufreq_dt.c,v 1.2.2.2 2017/12/03 11:37:01 jdolecek Exp $ */ 2 1.2.2.2 jdolecek 3 1.2.2.2 jdolecek /*- 4 1.2.2.2 jdolecek * Copyright (c) 2015-2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.2.2.2 jdolecek * All rights reserved. 6 1.2.2.2 jdolecek * 7 1.2.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 jdolecek * modification, are permitted provided that the following conditions 9 1.2.2.2 jdolecek * are met: 10 1.2.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 jdolecek * documentation and/or other materials provided with the distribution. 15 1.2.2.2 jdolecek * 16 1.2.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.2.2 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.2.2 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.2.2 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.2.2 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.2.2 jdolecek * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.2.2 jdolecek * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.2.2 jdolecek * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.2.2 jdolecek * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 jdolecek * SUCH DAMAGE. 27 1.2.2.2 jdolecek */ 28 1.2.2.2 jdolecek 29 1.2.2.2 jdolecek #include <sys/cdefs.h> 30 1.2.2.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: cpufreq_dt.c,v 1.2.2.2 2017/12/03 11:37:01 jdolecek Exp $"); 31 1.2.2.2 jdolecek 32 1.2.2.2 jdolecek #include <sys/param.h> 33 1.2.2.2 jdolecek #include <sys/systm.h> 34 1.2.2.2 jdolecek #include <sys/device.h> 35 1.2.2.2 jdolecek #include <sys/kmem.h> 36 1.2.2.2 jdolecek #include <sys/bus.h> 37 1.2.2.2 jdolecek #include <sys/atomic.h> 38 1.2.2.2 jdolecek #include <sys/xcall.h> 39 1.2.2.2 jdolecek #include <sys/sysctl.h> 40 1.2.2.2 jdolecek 41 1.2.2.2 jdolecek #include <dev/fdt/fdtvar.h> 42 1.2.2.2 jdolecek 43 1.2.2.2 jdolecek struct cpufreq_dt_opp { 44 1.2.2.2 jdolecek u_int freq_khz; 45 1.2.2.2 jdolecek u_int voltage_uv; 46 1.2.2.2 jdolecek }; 47 1.2.2.2 jdolecek 48 1.2.2.2 jdolecek struct cpufreq_dt_softc { 49 1.2.2.2 jdolecek device_t sc_dev; 50 1.2.2.2 jdolecek int sc_phandle; 51 1.2.2.2 jdolecek struct clk *sc_clk; 52 1.2.2.2 jdolecek struct fdtbus_regulator *sc_supply; 53 1.2.2.2 jdolecek 54 1.2.2.2 jdolecek struct cpufreq_dt_opp *sc_opp; 55 1.2.2.2 jdolecek ssize_t sc_nopp; 56 1.2.2.2 jdolecek int sc_latency; 57 1.2.2.2 jdolecek 58 1.2.2.2 jdolecek u_int sc_freq_target; 59 1.2.2.2 jdolecek bool sc_freq_throttle; 60 1.2.2.2 jdolecek 61 1.2.2.2 jdolecek u_int sc_busy; 62 1.2.2.2 jdolecek 63 1.2.2.2 jdolecek char *sc_freq_available; 64 1.2.2.2 jdolecek int sc_node_target; 65 1.2.2.2 jdolecek int sc_node_current; 66 1.2.2.2 jdolecek int sc_node_available; 67 1.2.2.2 jdolecek }; 68 1.2.2.2 jdolecek 69 1.2.2.2 jdolecek static void 70 1.2.2.2 jdolecek cpufreq_dt_change_cb(void *arg1, void *arg2) 71 1.2.2.2 jdolecek { 72 1.2.2.2 jdolecek #if notyet 73 1.2.2.2 jdolecek struct cpu_info *ci = curcpu(); 74 1.2.2.2 jdolecek ci->ci_data.cpu_cc_freq = cpufreq_get_rate() * 1000000; 75 1.2.2.2 jdolecek #endif 76 1.2.2.2 jdolecek } 77 1.2.2.2 jdolecek 78 1.2.2.2 jdolecek static int 79 1.2.2.2 jdolecek cpufreq_dt_set_rate(struct cpufreq_dt_softc *sc, u_int freq_khz) 80 1.2.2.2 jdolecek { 81 1.2.2.2 jdolecek struct cpufreq_dt_opp *opp = NULL; 82 1.2.2.2 jdolecek u_int old_rate, new_rate, old_uv, new_uv; 83 1.2.2.2 jdolecek uint64_t xc; 84 1.2.2.2 jdolecek int error; 85 1.2.2.2 jdolecek ssize_t n; 86 1.2.2.2 jdolecek 87 1.2.2.2 jdolecek for (n = 0; n < sc->sc_nopp; n++) 88 1.2.2.2 jdolecek if (sc->sc_opp[n].freq_khz == freq_khz) { 89 1.2.2.2 jdolecek opp = &sc->sc_opp[n]; 90 1.2.2.2 jdolecek break; 91 1.2.2.2 jdolecek } 92 1.2.2.2 jdolecek if (opp == NULL) 93 1.2.2.2 jdolecek return EINVAL; 94 1.2.2.2 jdolecek 95 1.2.2.2 jdolecek old_rate = clk_get_rate(sc->sc_clk); 96 1.2.2.2 jdolecek new_rate = freq_khz * 1000; 97 1.2.2.2 jdolecek 98 1.2.2.2 jdolecek if (old_rate == new_rate) 99 1.2.2.2 jdolecek return 0; 100 1.2.2.2 jdolecek 101 1.2.2.2 jdolecek error = fdtbus_regulator_get_voltage(sc->sc_supply, &old_uv); 102 1.2.2.2 jdolecek if (error != 0) 103 1.2.2.2 jdolecek return error; 104 1.2.2.2 jdolecek new_uv = opp->voltage_uv; 105 1.2.2.2 jdolecek 106 1.2.2.2 jdolecek if (new_uv > old_uv) { 107 1.2.2.2 jdolecek error = fdtbus_regulator_set_voltage(sc->sc_supply, 108 1.2.2.2 jdolecek new_uv, new_uv); 109 1.2.2.2 jdolecek if (error != 0) 110 1.2.2.2 jdolecek return error; 111 1.2.2.2 jdolecek } 112 1.2.2.2 jdolecek 113 1.2.2.2 jdolecek error = clk_set_rate(sc->sc_clk, new_rate); 114 1.2.2.2 jdolecek if (error != 0) 115 1.2.2.2 jdolecek return error; 116 1.2.2.2 jdolecek 117 1.2.2.2 jdolecek if (new_uv < old_uv) { 118 1.2.2.2 jdolecek error = fdtbus_regulator_set_voltage(sc->sc_supply, 119 1.2.2.2 jdolecek new_uv, new_uv); 120 1.2.2.2 jdolecek if (error != 0) 121 1.2.2.2 jdolecek return error; 122 1.2.2.2 jdolecek } 123 1.2.2.2 jdolecek 124 1.2.2.2 jdolecek if (error == 0) { 125 1.2.2.2 jdolecek xc = xc_broadcast(0, cpufreq_dt_change_cb, sc, NULL); 126 1.2.2.2 jdolecek xc_wait(xc); 127 1.2.2.2 jdolecek 128 1.2.2.2 jdolecek pmf_event_inject(NULL, PMFE_SPEED_CHANGED); 129 1.2.2.2 jdolecek } 130 1.2.2.2 jdolecek 131 1.2.2.2 jdolecek return 0; 132 1.2.2.2 jdolecek } 133 1.2.2.2 jdolecek 134 1.2.2.2 jdolecek static void 135 1.2.2.2 jdolecek cpufreq_dt_throttle_enable(device_t dev) 136 1.2.2.2 jdolecek { 137 1.2.2.2 jdolecek struct cpufreq_dt_softc * const sc = device_private(dev); 138 1.2.2.2 jdolecek 139 1.2.2.2 jdolecek if (sc->sc_freq_throttle) 140 1.2.2.2 jdolecek return; 141 1.2.2.2 jdolecek 142 1.2.2.2 jdolecek const u_int freq_khz = sc->sc_opp[sc->sc_nopp - 1].freq_khz; 143 1.2.2.2 jdolecek 144 1.2.2.2 jdolecek while (atomic_cas_uint(&sc->sc_busy, 0, 1) != 0) 145 1.2.2.2 jdolecek kpause("throttle", false, 1, NULL); 146 1.2.2.2 jdolecek 147 1.2.2.2 jdolecek if (cpufreq_dt_set_rate(sc, freq_khz) == 0) { 148 1.2.2.2 jdolecek aprint_debug_dev(sc->sc_dev, "throttle enabled (%u.%03u MHz)\n", 149 1.2.2.2 jdolecek freq_khz / 1000, freq_khz % 1000); 150 1.2.2.2 jdolecek sc->sc_freq_throttle = true; 151 1.2.2.2 jdolecek if (sc->sc_freq_target == 0) 152 1.2.2.2 jdolecek sc->sc_freq_target = clk_get_rate(sc->sc_clk) / 1000000; 153 1.2.2.2 jdolecek } 154 1.2.2.2 jdolecek 155 1.2.2.2 jdolecek atomic_dec_uint(&sc->sc_busy); 156 1.2.2.2 jdolecek } 157 1.2.2.2 jdolecek 158 1.2.2.2 jdolecek static void 159 1.2.2.2 jdolecek cpufreq_dt_throttle_disable(device_t dev) 160 1.2.2.2 jdolecek { 161 1.2.2.2 jdolecek struct cpufreq_dt_softc * const sc = device_private(dev); 162 1.2.2.2 jdolecek 163 1.2.2.2 jdolecek if (!sc->sc_freq_throttle) 164 1.2.2.2 jdolecek return; 165 1.2.2.2 jdolecek 166 1.2.2.2 jdolecek while (atomic_cas_uint(&sc->sc_busy, 0, 1) != 0) 167 1.2.2.2 jdolecek kpause("throttle", false, 1, NULL); 168 1.2.2.2 jdolecek 169 1.2.2.2 jdolecek const u_int freq_khz = sc->sc_freq_target * 1000; 170 1.2.2.2 jdolecek 171 1.2.2.2 jdolecek if (cpufreq_dt_set_rate(sc, freq_khz) == 0) { 172 1.2.2.2 jdolecek aprint_debug_dev(sc->sc_dev, "throttle disabled (%u.%03u MHz)\n", 173 1.2.2.2 jdolecek freq_khz / 1000, freq_khz % 1000); 174 1.2.2.2 jdolecek sc->sc_freq_throttle = false; 175 1.2.2.2 jdolecek } 176 1.2.2.2 jdolecek 177 1.2.2.2 jdolecek atomic_dec_uint(&sc->sc_busy); 178 1.2.2.2 jdolecek } 179 1.2.2.2 jdolecek 180 1.2.2.2 jdolecek static int 181 1.2.2.2 jdolecek cpufreq_dt_sysctl_helper(SYSCTLFN_ARGS) 182 1.2.2.2 jdolecek { 183 1.2.2.2 jdolecek struct cpufreq_dt_softc * const sc = rnode->sysctl_data; 184 1.2.2.2 jdolecek struct sysctlnode node; 185 1.2.2.2 jdolecek u_int fq, oldfq = 0; 186 1.2.2.2 jdolecek int error, n; 187 1.2.2.2 jdolecek 188 1.2.2.2 jdolecek node = *rnode; 189 1.2.2.2 jdolecek node.sysctl_data = &fq; 190 1.2.2.2 jdolecek 191 1.2.2.2 jdolecek if (rnode->sysctl_num == sc->sc_node_target) { 192 1.2.2.2 jdolecek if (sc->sc_freq_target == 0) 193 1.2.2.2 jdolecek sc->sc_freq_target = clk_get_rate(sc->sc_clk) / 1000000; 194 1.2.2.2 jdolecek fq = sc->sc_freq_target; 195 1.2.2.2 jdolecek } else 196 1.2.2.2 jdolecek fq = clk_get_rate(sc->sc_clk) / 1000000; 197 1.2.2.2 jdolecek 198 1.2.2.2 jdolecek if (rnode->sysctl_num == sc->sc_node_target) 199 1.2.2.2 jdolecek oldfq = fq; 200 1.2.2.2 jdolecek 201 1.2.2.2 jdolecek if (sc->sc_freq_target == 0) 202 1.2.2.2 jdolecek sc->sc_freq_target = fq; 203 1.2.2.2 jdolecek 204 1.2.2.2 jdolecek error = sysctl_lookup(SYSCTLFN_CALL(&node)); 205 1.2.2.2 jdolecek if (error || newp == NULL) 206 1.2.2.2 jdolecek return error; 207 1.2.2.2 jdolecek 208 1.2.2.2 jdolecek if (fq == oldfq || rnode->sysctl_num != sc->sc_node_target) 209 1.2.2.2 jdolecek return 0; 210 1.2.2.2 jdolecek 211 1.2.2.2 jdolecek for (n = 0; n < sc->sc_nopp; n++) 212 1.2.2.2 jdolecek if (sc->sc_opp[n].freq_khz / 1000 == fq) 213 1.2.2.2 jdolecek break; 214 1.2.2.2 jdolecek if (n == sc->sc_nopp) 215 1.2.2.2 jdolecek return EINVAL; 216 1.2.2.2 jdolecek 217 1.2.2.2 jdolecek if (atomic_cas_uint(&sc->sc_busy, 0, 1) != 0) 218 1.2.2.2 jdolecek return EBUSY; 219 1.2.2.2 jdolecek 220 1.2.2.2 jdolecek sc->sc_freq_target = fq; 221 1.2.2.2 jdolecek 222 1.2.2.2 jdolecek if (sc->sc_freq_throttle) 223 1.2.2.2 jdolecek error = 0; 224 1.2.2.2 jdolecek else 225 1.2.2.2 jdolecek error = cpufreq_dt_set_rate(sc, fq * 1000); 226 1.2.2.2 jdolecek 227 1.2.2.2 jdolecek atomic_dec_uint(&sc->sc_busy); 228 1.2.2.2 jdolecek 229 1.2.2.2 jdolecek return error; 230 1.2.2.2 jdolecek } 231 1.2.2.2 jdolecek 232 1.2.2.2 jdolecek static void 233 1.2.2.2 jdolecek cpufreq_dt_init_sysctl(struct cpufreq_dt_softc *sc) 234 1.2.2.2 jdolecek { 235 1.2.2.2 jdolecek const struct sysctlnode *node, *cpunode, *freqnode; 236 1.2.2.2 jdolecek struct sysctllog *cpufreq_log = NULL; 237 1.2.2.2 jdolecek int error, i; 238 1.2.2.2 jdolecek 239 1.2.2.2 jdolecek sc->sc_freq_available = kmem_zalloc(strlen("XXXX ") * sc->sc_nopp, KM_SLEEP); 240 1.2.2.2 jdolecek for (i = 0; i < sc->sc_nopp; i++) { 241 1.2.2.2 jdolecek char buf[6]; 242 1.2.2.2 jdolecek snprintf(buf, sizeof(buf), i ? " %u" : "%u", sc->sc_opp[i].freq_khz / 1000); 243 1.2.2.2 jdolecek strcat(sc->sc_freq_available, buf); 244 1.2.2.2 jdolecek } 245 1.2.2.2 jdolecek 246 1.2.2.2 jdolecek error = sysctl_createv(&cpufreq_log, 0, NULL, &node, 247 1.2.2.2 jdolecek CTLFLAG_PERMANENT, CTLTYPE_NODE, "machdep", NULL, 248 1.2.2.2 jdolecek NULL, 0, NULL, 0, CTL_MACHDEP, CTL_EOL); 249 1.2.2.2 jdolecek if (error) 250 1.2.2.2 jdolecek goto sysctl_failed; 251 1.2.2.2 jdolecek error = sysctl_createv(&cpufreq_log, 0, &node, &cpunode, 252 1.2.2.2 jdolecek 0, CTLTYPE_NODE, "cpu", NULL, 253 1.2.2.2 jdolecek NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL); 254 1.2.2.2 jdolecek if (error) 255 1.2.2.2 jdolecek goto sysctl_failed; 256 1.2.2.2 jdolecek error = sysctl_createv(&cpufreq_log, 0, &cpunode, &freqnode, 257 1.2.2.2 jdolecek 0, CTLTYPE_NODE, "frequency", NULL, 258 1.2.2.2 jdolecek NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL); 259 1.2.2.2 jdolecek if (error) 260 1.2.2.2 jdolecek goto sysctl_failed; 261 1.2.2.2 jdolecek 262 1.2.2.2 jdolecek error = sysctl_createv(&cpufreq_log, 0, &freqnode, &node, 263 1.2.2.2 jdolecek CTLFLAG_READWRITE, CTLTYPE_INT, "target", NULL, 264 1.2.2.2 jdolecek cpufreq_dt_sysctl_helper, 0, (void *)sc, 0, 265 1.2.2.2 jdolecek CTL_CREATE, CTL_EOL); 266 1.2.2.2 jdolecek if (error) 267 1.2.2.2 jdolecek goto sysctl_failed; 268 1.2.2.2 jdolecek sc->sc_node_target = node->sysctl_num; 269 1.2.2.2 jdolecek 270 1.2.2.2 jdolecek error = sysctl_createv(&cpufreq_log, 0, &freqnode, &node, 271 1.2.2.2 jdolecek CTLFLAG_READWRITE, CTLTYPE_INT, "current", NULL, 272 1.2.2.2 jdolecek cpufreq_dt_sysctl_helper, 0, (void *)sc, 0, 273 1.2.2.2 jdolecek CTL_CREATE, CTL_EOL); 274 1.2.2.2 jdolecek if (error) 275 1.2.2.2 jdolecek goto sysctl_failed; 276 1.2.2.2 jdolecek sc->sc_node_current = node->sysctl_num; 277 1.2.2.2 jdolecek 278 1.2.2.2 jdolecek error = sysctl_createv(&cpufreq_log, 0, &freqnode, &node, 279 1.2.2.2 jdolecek 0, CTLTYPE_STRING, "available", NULL, 280 1.2.2.2 jdolecek NULL, 0, sc->sc_freq_available, 0, 281 1.2.2.2 jdolecek CTL_CREATE, CTL_EOL); 282 1.2.2.2 jdolecek if (error) 283 1.2.2.2 jdolecek goto sysctl_failed; 284 1.2.2.2 jdolecek sc->sc_node_available = node->sysctl_num; 285 1.2.2.2 jdolecek 286 1.2.2.2 jdolecek return; 287 1.2.2.2 jdolecek 288 1.2.2.2 jdolecek sysctl_failed: 289 1.2.2.2 jdolecek aprint_error_dev(sc->sc_dev, "couldn't create sysctl nodes: %d\n", error); 290 1.2.2.2 jdolecek sysctl_teardown(&cpufreq_log); 291 1.2.2.2 jdolecek } 292 1.2.2.2 jdolecek 293 1.2.2.2 jdolecek static int 294 1.2.2.2 jdolecek cpufreq_dt_parse(struct cpufreq_dt_softc *sc) 295 1.2.2.2 jdolecek { 296 1.2.2.2 jdolecek const int phandle = sc->sc_phandle; 297 1.2.2.2 jdolecek const u_int *opp; 298 1.2.2.2 jdolecek int len, i; 299 1.2.2.2 jdolecek u_int lat; 300 1.2.2.2 jdolecek 301 1.2.2.2 jdolecek sc->sc_supply = fdtbus_regulator_acquire(phandle, "cpu-supply"); 302 1.2.2.2 jdolecek if (sc->sc_supply == NULL) { 303 1.2.2.2 jdolecek aprint_error_dev(sc->sc_dev, "couldn't acquire cpu-supply\n"); 304 1.2.2.2 jdolecek return ENXIO; 305 1.2.2.2 jdolecek } 306 1.2.2.2 jdolecek sc->sc_clk = fdtbus_clock_get_index(phandle, 0); 307 1.2.2.2 jdolecek if (sc->sc_clk == NULL) { 308 1.2.2.2 jdolecek aprint_error_dev(sc->sc_dev, "couldn't acquire clock\n"); 309 1.2.2.2 jdolecek return ENXIO; 310 1.2.2.2 jdolecek } 311 1.2.2.2 jdolecek 312 1.2.2.2 jdolecek opp = fdtbus_get_prop(phandle, "operating-points", &len); 313 1.2.2.2 jdolecek if (len < 8) 314 1.2.2.2 jdolecek return ENXIO; 315 1.2.2.2 jdolecek 316 1.2.2.2 jdolecek sc->sc_nopp = len / 8; 317 1.2.2.2 jdolecek sc->sc_opp = kmem_zalloc(sizeof(*sc->sc_opp) * sc->sc_nopp, KM_SLEEP); 318 1.2.2.2 jdolecek for (i = 0; i < sc->sc_nopp; i++, opp += 2) { 319 1.2.2.2 jdolecek sc->sc_opp[i].freq_khz = be32toh(opp[0]); 320 1.2.2.2 jdolecek sc->sc_opp[i].voltage_uv = be32toh(opp[1]); 321 1.2.2.2 jdolecek 322 1.2.2.2 jdolecek aprint_verbose_dev(sc->sc_dev, "%u.%03u MHz, %u uV\n", 323 1.2.2.2 jdolecek sc->sc_opp[i].freq_khz / 1000, 324 1.2.2.2 jdolecek sc->sc_opp[i].freq_khz % 1000, 325 1.2.2.2 jdolecek sc->sc_opp[i].voltage_uv); 326 1.2.2.2 jdolecek } 327 1.2.2.2 jdolecek 328 1.2.2.2 jdolecek if (of_getprop_uint32(phandle, "clock-latency", &lat) == 0) 329 1.2.2.2 jdolecek sc->sc_latency = lat; 330 1.2.2.2 jdolecek else 331 1.2.2.2 jdolecek sc->sc_latency = -1; 332 1.2.2.2 jdolecek 333 1.2.2.2 jdolecek return 0; 334 1.2.2.2 jdolecek } 335 1.2.2.2 jdolecek 336 1.2.2.2 jdolecek static int 337 1.2.2.2 jdolecek cpufreq_dt_match(device_t parent, cfdata_t cf, void *aux) 338 1.2.2.2 jdolecek { 339 1.2.2.2 jdolecek struct fdt_attach_args * const faa = aux; 340 1.2.2.2 jdolecek const int phandle = faa->faa_phandle; 341 1.2.2.2 jdolecek bus_addr_t addr; 342 1.2.2.2 jdolecek 343 1.2.2.2 jdolecek if (fdtbus_get_reg(phandle, 0, &addr, NULL) != 0) 344 1.2.2.2 jdolecek return 0; 345 1.2.2.2 jdolecek /* Generic DT cpufreq driver properties must be defined under /cpus/cpu@0 */ 346 1.2.2.2 jdolecek if (addr != 0) 347 1.2.2.2 jdolecek return 0; 348 1.2.2.2 jdolecek 349 1.2.2.2 jdolecek if (!of_hasprop(phandle, "operating-points") || 350 1.2.2.2 jdolecek !of_hasprop(phandle, "clocks") || 351 1.2.2.2 jdolecek !of_hasprop(phandle, "cpu-supply")) 352 1.2.2.2 jdolecek return 0; 353 1.2.2.2 jdolecek 354 1.2.2.2 jdolecek return 1; 355 1.2.2.2 jdolecek } 356 1.2.2.2 jdolecek 357 1.2.2.2 jdolecek static void 358 1.2.2.2 jdolecek cpufreq_dt_init(device_t self) 359 1.2.2.2 jdolecek { 360 1.2.2.2 jdolecek struct cpufreq_dt_softc * const sc = device_private(self); 361 1.2.2.2 jdolecek int error; 362 1.2.2.2 jdolecek 363 1.2.2.2 jdolecek if ((error = cpufreq_dt_parse(sc)) != 0) 364 1.2.2.2 jdolecek return; 365 1.2.2.2 jdolecek 366 1.2.2.2 jdolecek cpufreq_dt_init_sysctl(sc); 367 1.2.2.2 jdolecek } 368 1.2.2.2 jdolecek 369 1.2.2.2 jdolecek static void 370 1.2.2.2 jdolecek cpufreq_dt_attach(device_t parent, device_t self, void *aux) 371 1.2.2.2 jdolecek { 372 1.2.2.2 jdolecek struct cpufreq_dt_softc * const sc = device_private(self); 373 1.2.2.2 jdolecek struct fdt_attach_args * const faa = aux; 374 1.2.2.2 jdolecek 375 1.2.2.2 jdolecek sc->sc_dev = self; 376 1.2.2.2 jdolecek sc->sc_phandle = faa->faa_phandle; 377 1.2.2.2 jdolecek 378 1.2.2.2 jdolecek aprint_naive("\n"); 379 1.2.2.2 jdolecek aprint_normal("\n"); 380 1.2.2.2 jdolecek 381 1.2.2.2 jdolecek pmf_event_register(self, PMFE_THROTTLE_ENABLE, cpufreq_dt_throttle_enable, true); 382 1.2.2.2 jdolecek pmf_event_register(self, PMFE_THROTTLE_DISABLE, cpufreq_dt_throttle_disable, true); 383 1.2.2.2 jdolecek 384 1.2.2.2 jdolecek config_interrupts(self, cpufreq_dt_init); 385 1.2.2.2 jdolecek } 386 1.2.2.2 jdolecek 387 1.2.2.2 jdolecek CFATTACH_DECL_NEW(cpufreq_dt, sizeof(struct cpufreq_dt_softc), 388 1.2.2.2 jdolecek cpufreq_dt_match, cpufreq_dt_attach, NULL, NULL); 389
Indexes created Fri Oct 03 02:09:57 GMT 2025