1 /* $OpenBSD: qcpmic.c,v 1.3 2025/01/03 14:13:55 kettenis Exp $ */ 2 /* 3 * Copyright (c) 2022 Patrick Wildt <patrick@blueri.se> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/param.h> 19 #include <sys/malloc.h> 20 #include <sys/systm.h> 21 #include <sys/timeout.h> 22 23 #include <machine/bus.h> 24 #include <machine/fdt.h> 25 26 #include <dev/fdt/spmivar.h> 27 28 #include <dev/ofw/openfirm.h> 29 #include <dev/ofw/fdt.h> 30 31 /* PMIC Registers. */ 32 #define PMIC_REV2 0x101 33 #define PMIC_REV3 0x102 34 #define PMIC_REV4 0x103 35 #define PMIC_TYPE 0x104 36 #define PMIC_TYPE_VAL 0x51 37 #define PMIC_SUBTYPE 0x105 38 #define PMIC_FAB_ID 0x1f2 39 40 struct qcpmic_softc { 41 struct device sc_dev; 42 int sc_node; 43 44 spmi_tag_t sc_tag; 45 int8_t sc_sid; 46 47 void *sc_ih; 48 49 struct timeout sc_tick; 50 }; 51 52 int qcpmic_match(struct device *, void *, void *); 53 void qcpmic_attach(struct device *, struct device *, void *); 54 55 const struct cfattach qcpmic_ca = { 56 sizeof(struct qcpmic_softc), qcpmic_match, qcpmic_attach 57 }; 58 59 struct cfdriver qcpmic_cd = { 60 NULL, "qcpmic", DV_DULL 61 }; 62 63 uint8_t qcpmic_read(struct qcpmic_softc *, uint16_t); 64 65 int 66 qcpmic_match(struct device *parent, void *match, void *aux) 67 { 68 struct spmi_attach_args *saa = aux; 69 70 return OF_is_compatible(saa->sa_node, "qcom,spmi-pmic"); 71 } 72 73 void 74 qcpmic_attach(struct device *parent, struct device *self, void *aux) 75 { 76 struct spmi_attach_args *saa = aux; 77 struct qcpmic_softc *sc = (struct qcpmic_softc *)self; 78 struct spmi_attach_args sa; 79 char name[32]; 80 int node; 81 82 sc->sc_node = saa->sa_node; 83 sc->sc_tag = saa->sa_tag; 84 sc->sc_sid = saa->sa_sid; 85 86 if (qcpmic_read(sc, PMIC_TYPE) != PMIC_TYPE_VAL) { 87 printf(": unknown PMIC type\n"); 88 return; 89 } 90 91 printf("\n"); 92 93 for (node = OF_child(saa->sa_node); node; node = OF_peer(node)) { 94 memset(name, 0, sizeof(name)); 95 if (OF_getprop(node, "compatible", name, sizeof(name)) == -1) 96 continue; 97 if (name[0] == '\0') 98 continue; 99 100 memset(&sa, 0, sizeof(sa)); 101 sa.sa_tag = sc->sc_tag; 102 sa.sa_sid = sc->sc_sid; 103 sa.sa_name = name; 104 sa.sa_node = node; 105 config_found(self, &sa, NULL); 106 } 107 } 108 109 uint8_t 110 qcpmic_read(struct qcpmic_softc *sc, uint16_t addr) 111 { 112 uint8_t reg = 0; 113 int err; 114 115 err = spmi_cmd_read(sc->sc_tag, sc->sc_sid, SPMI_CMD_EXT_READL, 116 addr, ®, sizeof(reg)); 117 if (err) 118 printf("%s: error (%u) reading 0x%x", sc->sc_dev.dv_xname, 119 err, addr); 120 121 return reg; 122 } 123