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- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2024 The FreeBSD Foundation
- *
- * This software was developed by Mitchell Horne <mhorne@FreeBSD.org> under
- * sponsorship from the FreeBSD Foundation.
- */
- /*
- * StarFive syscon driver.
- *
- * On the JH7110, the PLL clock driver is a child of the sys-syscon device.
- * This needs to probe very early (BUS_PASS_BUS + BUS_PASS_ORDER_EARLY).
- */
- #include <sys/param.h>
- #include <sys/bus.h>
- #include <sys/kernel.h>
- #include <sys/module.h>
- #include <sys/mutex.h>
- #include <machine/bus.h>
- #include <dev/ofw/openfirm.h>
- #include <dev/ofw/ofw_bus.h>
- #include <dev/ofw/ofw_bus_subr.h>
- #include <dev/syscon/syscon.h>
- #include <dev/syscon/syscon_generic.h>
- #include <dev/fdt/simple_mfd.h>
- enum starfive_syscon_type {
- JH7110_SYSCON_SYS = 1,
- JH7110_SYSCON_AON,
- JH7110_SYSCON_STG,
- };
- static struct ofw_compat_data compat_data[] = {
- { "starfive,jh7110-sys-syscon", JH7110_SYSCON_SYS },
- { "starfive,jh7110-aon-syscon", JH7110_SYSCON_AON },
- { "starfive,jh7110-stg-syscon", JH7110_SYSCON_STG },
- { NULL, 0 }
- };
- static int
- starfive_syscon_probe(device_t dev)
- {
- enum starfive_syscon_type type;
- if (!ofw_bus_status_okay(dev))
- return (ENXIO);
- type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
- if (type == 0)
- return (ENXIO);
- switch (type) {
- case JH7110_SYSCON_SYS:
- device_set_desc(dev, "JH7110 SYS syscon");
- break;
- case JH7110_SYSCON_AON:
- device_set_desc(dev, "JH7110 AON syscon");
- break;
- case JH7110_SYSCON_STG:
- device_set_desc(dev, "JH7110 STG syscon");
- break;
- }
- return (BUS_PROBE_DEFAULT);
- }
- static device_method_t starfive_syscon_methods[] = {
- DEVMETHOD(device_probe, starfive_syscon_probe),
- DEVMETHOD_END
- };
- DEFINE_CLASS_1(starfive_syscon, starfive_syscon_driver, starfive_syscon_methods,
- sizeof(struct syscon_generic_softc), simple_mfd_driver);
- EARLY_DRIVER_MODULE(starfive_syscon, simplebus, starfive_syscon_driver, 0, 0,
- BUS_PASS_BUS + BUS_PASS_ORDER_EARLY);
- MODULE_VERSION(starfive_syscon, 1);
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