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/* $OpenBSD: qcpmic.c,v 1.2 2024/08/14 10:54:58 mglocker Exp $ */
/*
* Copyright (c) 2022 Patrick Wildt <patrick@blueri.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/timeout.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/fdt/spmivar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_clock.h>
#include <dev/ofw/ofw_power.h>
#include <dev/ofw/fdt.h>
/* PMIC Registers. */
#define PMIC_REV2 0x101
#define PMIC_REV3 0x102
#define PMIC_REV4 0x103
#define PMIC_TYPE 0x104
#define PMIC_TYPE_VAL 0x51
#define PMIC_SUBTYPE 0x105
#define PMIC_FAB_ID 0x1f2
struct qcpmic_softc {
struct device sc_dev;
int sc_node;
spmi_tag_t sc_tag;
int8_t sc_sid;
void *sc_ih;
struct timeout sc_tick;
};
int qcpmic_match(struct device *, void *, void *);
void qcpmic_attach(struct device *, struct device *, void *);
const struct cfattach qcpmic_ca = {
sizeof(struct qcpmic_softc), qcpmic_match, qcpmic_attach
};
struct cfdriver qcpmic_cd = {
NULL, "qcpmic", DV_DULL
};
uint8_t qcpmic_read(struct qcpmic_softc *, uint16_t);
int
qcpmic_match(struct device *parent, void *match, void *aux)
{
struct spmi_attach_args *saa = aux;
return OF_is_compatible(saa->sa_node, "qcom,spmi-pmic");
}
void
qcpmic_attach(struct device *parent, struct device *self, void *aux)
{
struct spmi_attach_args *saa = aux;
struct qcpmic_softc *sc = (struct qcpmic_softc *)self;
struct spmi_attach_args sa;
char name[32];
int node;
sc->sc_node = saa->sa_node;
sc->sc_tag = saa->sa_tag;
sc->sc_sid = saa->sa_sid;
if (qcpmic_read(sc, PMIC_TYPE) != PMIC_TYPE_VAL) {
printf(": unknown PMIC type\n");
return;
}
printf("\n");
for (node = OF_child(saa->sa_node); node; node = OF_peer(node)) {
memset(name, 0, sizeof(name));
if (OF_getprop(node, "compatible", name, sizeof(name)) == -1)
continue;
if (name[0] == '\0')
continue;
memset(&sa, 0, sizeof(sa));
sa.sa_tag = sc->sc_tag;
sa.sa_sid = sc->sc_sid;
sa.sa_name = name;
sa.sa_node = node;
config_found(self, &sa, NULL);
}
}
uint8_t
qcpmic_read(struct qcpmic_softc *sc, uint16_t addr)
{
uint8_t reg = 0;
int err;
err = spmi_cmd_read(sc->sc_tag, sc->sc_sid, SPMI_CMD_EXT_READL,
addr, ®, sizeof(reg));
if (err)
printf("%s: error (%u) reading 0x%x", sc->sc_dev.dv_xname,
err, addr);
return reg;
}
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