axp22x.c revision 1.3.2.2
1 1.3.2.2 jdolecek /* $NetBSD: axp22x.c,v 1.3.2.2 2017/12/03 11:37:02 jdolecek Exp $ */ 2 1.3.2.2 jdolecek 3 1.3.2.2 jdolecek /*- 4 1.3.2.2 jdolecek * Copyright (c) 2014 Jared D. McNeill <jmcneill (at) invisible.ca> 5 1.3.2.2 jdolecek * All rights reserved. 6 1.3.2.2 jdolecek * 7 1.3.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 jdolecek * modification, are permitted provided that the following conditions 9 1.3.2.2 jdolecek * are met: 10 1.3.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 jdolecek * documentation and/or other materials provided with the distribution. 15 1.3.2.2 jdolecek * 16 1.3.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.3.2.2 jdolecek * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.3.2.2 jdolecek * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.3.2.2 jdolecek * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.3.2.2 jdolecek * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.3.2.2 jdolecek * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.3.2.2 jdolecek * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.3.2.2 jdolecek * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.3.2.2 jdolecek * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.3.2.2 jdolecek * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.3.2.2 jdolecek * POSSIBILITY OF SUCH DAMAGE. 27 1.3.2.2 jdolecek */ 28 1.3.2.2 jdolecek 29 1.3.2.2 jdolecek #include <sys/cdefs.h> 30 1.3.2.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: axp22x.c,v 1.3.2.2 2017/12/03 11:37:02 jdolecek Exp $"); 31 1.3.2.2 jdolecek 32 1.3.2.2 jdolecek #include <sys/param.h> 33 1.3.2.2 jdolecek #include <sys/systm.h> 34 1.3.2.2 jdolecek #include <sys/device.h> 35 1.3.2.2 jdolecek #include <sys/conf.h> 36 1.3.2.2 jdolecek #include <sys/bus.h> 37 1.3.2.2 jdolecek #include <sys/kmem.h> 38 1.3.2.2 jdolecek 39 1.3.2.2 jdolecek #include <dev/i2c/i2cvar.h> 40 1.3.2.2 jdolecek 41 1.3.2.2 jdolecek #include <dev/sysmon/sysmonvar.h> 42 1.3.2.2 jdolecek 43 1.3.2.2 jdolecek static const char *compatible[] = { 44 1.3.2.2 jdolecek "x-powers,axp221", 45 1.3.2.2 jdolecek NULL 46 1.3.2.2 jdolecek }; 47 1.3.2.2 jdolecek 48 1.3.2.2 jdolecek #define AXP_TEMP_MON_REG 0x56 /* 2 bytes */ 49 1.3.2.2 jdolecek 50 1.3.2.2 jdolecek struct axp22x_softc { 51 1.3.2.2 jdolecek device_t sc_dev; 52 1.3.2.2 jdolecek i2c_tag_t sc_i2c; 53 1.3.2.2 jdolecek i2c_addr_t sc_addr; 54 1.3.2.2 jdolecek 55 1.3.2.2 jdolecek struct sysmon_envsys *sc_sme; 56 1.3.2.2 jdolecek envsys_data_t sc_sensor_temp; 57 1.3.2.2 jdolecek }; 58 1.3.2.2 jdolecek 59 1.3.2.2 jdolecek static int axp22x_match(device_t, cfdata_t, void *); 60 1.3.2.2 jdolecek static void axp22x_attach(device_t, device_t, void *); 61 1.3.2.2 jdolecek 62 1.3.2.2 jdolecek static void axp22x_sensors_refresh(struct sysmon_envsys *, envsys_data_t *); 63 1.3.2.2 jdolecek static int axp22x_read(struct axp22x_softc *, uint8_t, uint8_t *, size_t); 64 1.3.2.2 jdolecek 65 1.3.2.2 jdolecek CFATTACH_DECL_NEW(axp22x, sizeof(struct axp22x_softc), 66 1.3.2.2 jdolecek axp22x_match, axp22x_attach, NULL, NULL); 67 1.3.2.2 jdolecek 68 1.3.2.2 jdolecek static int 69 1.3.2.2 jdolecek axp22x_match(device_t parent, cfdata_t match, void *aux) 70 1.3.2.2 jdolecek { 71 1.3.2.2 jdolecek struct i2c_attach_args *ia = aux; 72 1.3.2.2 jdolecek 73 1.3.2.2 jdolecek if (ia->ia_name != NULL) 74 1.3.2.2 jdolecek return iic_compat_match(ia, compatible); 75 1.3.2.2 jdolecek 76 1.3.2.2 jdolecek return 1; 77 1.3.2.2 jdolecek } 78 1.3.2.2 jdolecek 79 1.3.2.2 jdolecek static void 80 1.3.2.2 jdolecek axp22x_attach(device_t parent, device_t self, void *aux) 81 1.3.2.2 jdolecek { 82 1.3.2.2 jdolecek struct axp22x_softc *sc = device_private(self); 83 1.3.2.2 jdolecek struct i2c_attach_args *ia = aux; 84 1.3.2.2 jdolecek 85 1.3.2.2 jdolecek sc->sc_dev = self; 86 1.3.2.2 jdolecek sc->sc_i2c = ia->ia_tag; 87 1.3.2.2 jdolecek sc->sc_addr = ia->ia_addr; 88 1.3.2.2 jdolecek 89 1.3.2.2 jdolecek aprint_naive("\n"); 90 1.3.2.2 jdolecek aprint_normal("\n"); 91 1.3.2.2 jdolecek 92 1.3.2.2 jdolecek sc->sc_sme = sysmon_envsys_create(); 93 1.3.2.2 jdolecek sc->sc_sme->sme_name = device_xname(self); 94 1.3.2.2 jdolecek sc->sc_sme->sme_cookie = sc; 95 1.3.2.2 jdolecek sc->sc_sme->sme_refresh = axp22x_sensors_refresh; 96 1.3.2.2 jdolecek 97 1.3.2.2 jdolecek sc->sc_sensor_temp.units = ENVSYS_STEMP; 98 1.3.2.2 jdolecek sc->sc_sensor_temp.state = ENVSYS_SINVALID; 99 1.3.2.2 jdolecek sc->sc_sensor_temp.flags = ENVSYS_FHAS_ENTROPY; 100 1.3.2.2 jdolecek snprintf(sc->sc_sensor_temp.desc, sizeof(sc->sc_sensor_temp.desc), 101 1.3.2.2 jdolecek "internal temperature"); 102 1.3.2.2 jdolecek sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_temp); 103 1.3.2.2 jdolecek 104 1.3.2.2 jdolecek sysmon_envsys_register(sc->sc_sme); 105 1.3.2.2 jdolecek } 106 1.3.2.2 jdolecek 107 1.3.2.2 jdolecek static void 108 1.3.2.2 jdolecek axp22x_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 109 1.3.2.2 jdolecek { 110 1.3.2.2 jdolecek struct axp22x_softc *sc = sme->sme_cookie; 111 1.3.2.2 jdolecek uint8_t buf[2]; 112 1.3.2.2 jdolecek int error; 113 1.3.2.2 jdolecek 114 1.3.2.2 jdolecek iic_acquire_bus(sc->sc_i2c, 0); 115 1.3.2.2 jdolecek error = axp22x_read(sc, AXP_TEMP_MON_REG, buf, sizeof(buf)); 116 1.3.2.2 jdolecek iic_release_bus(sc->sc_i2c, 0); 117 1.3.2.2 jdolecek 118 1.3.2.2 jdolecek if (error) { 119 1.3.2.2 jdolecek edata->state = ENVSYS_SINVALID; 120 1.3.2.2 jdolecek } else { 121 1.3.2.2 jdolecek /* between -243.7C and 165.8C, step +0.1C */ 122 1.3.2.2 jdolecek edata->value_cur = (((buf[0] << 4) | (buf[1] & 0xf)) - 2437) 123 1.3.2.2 jdolecek * 100000 + 273150000; 124 1.3.2.2 jdolecek edata->state = ENVSYS_SVALID; 125 1.3.2.2 jdolecek } 126 1.3.2.2 jdolecek } 127 1.3.2.2 jdolecek 128 1.3.2.2 jdolecek static int 129 1.3.2.2 jdolecek axp22x_read(struct axp22x_softc *sc, uint8_t reg, uint8_t *val, size_t len) 130 1.3.2.2 jdolecek { 131 1.3.2.2 jdolecek size_t i; 132 1.3.2.2 jdolecek int error; 133 1.3.2.2 jdolecek 134 1.3.2.2 jdolecek for (i = 0; i < len; i++) { 135 1.3.2.2 jdolecek error = iic_smbus_read_byte(sc->sc_i2c, sc->sc_addr, 136 1.3.2.2 jdolecek reg + i, &val[i], 0); 137 1.3.2.2 jdolecek if (error) 138 1.3.2.2 jdolecek return error; 139 1.3.2.2 jdolecek } 140 1.3.2.2 jdolecek 141 1.3.2.2 jdolecek return 0; 142 1.3.2.2 jdolecek } 143
Indexes created Mon Oct 20 03:09:53 GMT 2025